WALKER II - ServiceDocs.Com

SERVICE MANUAL

WALKER II EU

W A L K E R I I E U

SPECIFICATIONS

General

Frequency coverage 26.965 ~ 27.405MHz

Operating mode F3E (FM), A3E (AM)

Number of channels 40 EU / 40 PL / 80 d / 40 EC / 40 UK+40 CEPT / 27 In

Antenna Impedance 50Ω

Working temperature –10℃~+55℃

Frequency Tolerance Better than 0.002%

Input Voltage 13.2V DC

Grounding Method Negative ground

Current Drain Transmitter 3.0A Max.

Receiver About 300mA 0.8A (VOL Max.) Dimensions (W x H x D) With projections

Microphone: 60 x 41 x 82 mm Body: 170 x 202 x 52 mm

Weight Approx.1Kg

RECEIVER

Receiving System Dual conversion superheterodyne

IF Frequencies Double Conversion 1st 10.695MHz/ 2nd 455KHz

Sensitivity -112dBm for 20dB SINAD in AM Mode

-117dBm for 20dB SINAD in FM Mode

Audio Output Power 3 watts max @8Ω

Audio Distortion Less than 5% @ 1KHz

Image Rejection 70dB

Adjacent Channel Rejection 60dB

Frequency Response 300Hz to 3000Hz

Squelch Less than 1.0μV

TRANSMITTER

Output Power FM/AM: 4.0 W

Modulated signal distortion Inferior to 5%

Frequency Response 300Hz to 3000Hz Output Impedance 50ohms, Unbalanced Harmonic Suppression More than -54dBm

WALKER II EU

CIRCUIT DESCRIPTION

Frequency configurationThe receiver utilizes double conversion. The first IF is 10.695MHz and the second IF is 455kHz. The

first local oscillator signal is supplied from the VCO module. The VCO module in the transmitter generates the necessary frequencies. Fig. 1 shows the frequencies.

ANT SWRF

AMP

MCF

10.695MHz

IF SYSTEM

455KHzCF

ANT

AFAMP SP

RFAMP

RFAMP

VCO MODULE MICMICAMP

RX

FM TX

10.240MHz

AM MODAM MOD

1`ST MIX

26.965-27.405MHz

POWER

AM MODSUPPILES

Fig. 1 Frequency configuration

Receiver The frequency configuration of the receiver is shown in Fig. 2.

Front - end RF amplifier An incoming signal from the antenna is applied to an RF amplifier (Q103) after passing through a transmit/receive switch circuit (D108 and D109 are off). After the signal is filtered through a band pass filter (L103, L104 and L105) to eliminate unwanted signals before it is passed to the first mixer.

First Mixer The signal from the RF amplifier is heterodyned with the first local oscillator signal from the VCO module at the first mixer (Q104) to create a 10.695MHz first intermediate frequency (1st IF) signal. The first IF signal is filtered through a band pass filter (L106, L107and L108) and then fed through the monolithic crystal filter (MCFs : CB100) to further remove spurious signals.

The band-pass filters are tuned to a desired frequency by varicaps (D112, D113, D114,). A tuning voltage corresponding to the desired signal is applied to each varicap through the DC amplifier of the U303B to tune to the receive frequency.

IF amplifierThe first IF signal go into second mixer Q113, second mixer mix first IF and 10.24MHZ second IF output

Y100. The signal is heterodyned again with a second local oscillator signal. The second IF signal is then fed through a 455kHz ceramic filter (CF100) to further eliminate unwanted signals. The signal is amplified by Q114 and Q105, and then the second IF signal enter U101 (FM processing IC) in FM mode or changed

WALKER II EU

CIRCUIT DESCRIPTION

according to D117 diode DC and receive audio signal output.

ANT SW

FM IF DET

ANT

1st Local OSC

U101

IF AMPQ113

MCFCB100RF AMP

Q103

OSC 10.240MHz

CF100455kHz

(VCO MODULE)

1ST MIXERQ104

FM AF

BPF

AM DETD117

AM AF

BPF

CF500

10.695MHz

AF AMPU307B

BPF

RF AMPQ105

AF SWU304

RF AMPQ114

U303BDC AMP

Tuning voltage

D112,D113,D114

FROMU302E

(DC CONT)

FROMSP MUTE line

AF PAU305

JACK(EXT SP)

SP

(MPU)

AF MUTEQ317

ELECTRICAL

U302A,U302BVOLUME

SPEAKER SWD306, Q318K300

Fig. 2 Receiver section configuration

AF amplifierThe FM IC output the FM AF passes through the AF amplifier (U307B) or The AM AF through the D117

and AF amplifier (U307B), and AF switch (U304),and Electrical Control Volume IC(U302). After goes to AF power amplifier IC (U305). Is routed to an audio power amplifier (U305) where it is amplified and output to the speaker. To output sounds from the speaker, U701 sends a high signal to the SPMUT line the turns Q317.

SquelchA squelch circuit is provided to prevent no-signal noise or weak signals from outputting to a speaker

during transmission.

Transmitter Transmit audio

The audio signal from the microphone goes through the MIC amplifiers (U300 and U301), and resulting signal goes to the VCO module through the VCO modulation terminal for direct FM modulation. The AM modulation signal enter into RF amplifier after passing through power supplies Q306, Q307 and Q311.

MIC

MIC AMPU300

VCO MODULE

AM MOD

Q306,Q307,Q311

(AM

)

(FM)

RF AMP

Q110

RF AMP

Q121

DRIVE AMP

Q120

POWER AMP

Q118, Q119

LPF

ANT

MIC AMPU301

RF AMPQ111

Fig. 3 Transmit circuit

WALKER II EU

CIRCUIT DESCRIPTION

Power Amplifier CircuitThe transmit output signal from the VCO module passes through the buffer amplified (Q111) and

amplified by Q110、Q121 and Q120. The amplified signal goes to the final amplifiers (Q118 and Q119) through a low-pass filter. The lowpass filter removes unwanted high-frequency harmonic components, and the resulting signal is transmitted through the antenna terminal.

Power Supply The power supply voltage is maintained to 8.0V, 5.0V and 3.3V by the series regulator (U501, U500 and

U503). It is used as MCU power 3M3, 8N, 8T and 8R. 8V is a common 8V. 8R is 8V for reception and output during reception. 8T is 8V for transmission and output during transmission. 5V is a common 5V.

Control Circuit MPU

The microprocessor (U701) operates at a clock of 12MHz. The control circuit consists of a microprocessor (U701) and its peripheral circuits. It controls the TX-RX

unit. U701 mainly performs the following: 1) Switching between transmission and reception by the PTT signal input.2) Sending frequency program data to the VCO module.3) Controlling squelch on/off by the DC voltage from the squelch circuit.4) Controls the second MPU.5) Controls the compander unit.6) Controls the power supply unit.

Display Circuit The MPU (U701) controls the display LCD and LEDs. The LCD driver (U800) and MPU (U701)

communicate through the DAT, CLK, CS lines.

WALKER II EU

Designators Comment FootprintC800 103P S0402C801 103P S0402C802 103P S0402C803 103P S0402C804 103P S0402C805 225P/10V S0402C806 225P/10V S0402C807 103P S0603C808 103P S0603C809 226P/25V S0805C810 226P/25V S0805C811 226P/25V S0805C812 103P S0402C813 475P/16V S0603D800 CESDBLC5V0D5 SOD523D801 R6GHBHC R6GHBHCD802 R6GHBHC R6GHBHCD803 R6GHBHC R6GHBHCD804 R6GHBHC R6GHBHCD805 R6GHBHC R6GHBHCD806 R6GHBHC R6GHBHCD807 R6GHBHC R6GHBHCD808 R6GHBHC R6GHBHC

DS800 HSA27718-UPTSZ-01 HSA27719-UNTSZ-01J800 CB-HKCZ-0012 QFM16-6F2J801 5V 2.1A SIP2T2J802 CGJ-JCJ-0467 CGJ-JCJ-USB180J803 0.5S-1-12PB SIPM12J804 0.5S-1-10PB SIPM10R800 75K/F S0603R801 43.2K/F S0603R802 100R S0402R803 1K S0402R804 1K S0402R805 1K S0402R806 1K S0402R807 49.9K/F S0603R808 49.9K/F S0603R809 100K S0402R810 100K S0402R811 100K S0402R812 100K S0402R813 100K S0402R814 100K S0402R815 100K S0402R816 100K S0402R817 100K S0402R818 100K S0402R819 100K S0402R820 100K S0402R821 2K2 S0402R822 2K2 S0402R823 2K2 S0402R824 2K2 S0402R825 2K2 S0402R826 2K2 S0402R827 2K2 S0402R828 2K2 S0402

LCD UNIT

WALKER II EUDesignators Comment Footprint

R829 2K2 S0402R830 51K S0402R831 51K S0402R832 51K S0402R833 51K S0402R834 51K S0402R835 51K S0402R836 10R S2010R837 1K S0402R838 1K S1206R839 10R S0603R840 10R S0603R841 33R S0603R842 10R S0603R843 10R S0603R844 33R S0603R845 390R S0603R846 390R S0603R847 680R S0603R848 1K5 S2010S801 MODE SKW(6*3.5*5)S802 VOX SKW(6*3.5*5)S803 F SKW(6*3.5*5)S804 CGJ-BDKG-0006 SW-R11NP

SW800 CGJ-BDKG-0006 SS-22D03SW801 CGJ-BDKG-0006 SS-22D03SW802 CGJ-BDKG-0006 SS-22D03U800 TM1622 LQFP64-7*7U801 TM1829 SOP8

Designators Comment FootprintJ702 CB-LJX-0107 SIP2T12W901 CGJ-JZKG-0001 VRHK9.5W902 CGJ-QTKG-0053 R09449GOW903 CGJ-YLKG-0050 R09448GS

Designators Comment FootprintC100 36P/J S0805C101 101P/J S0402C102 33K-NTC S0402C103 103P S0402C104 103P S0402C105 103P S0402C106 103P S0402C107 103P S0402C108 103P S0402C109 103P S0402C110 103P S0402C111 103P S0402C112 103P S0402C113 103P S0402C114 103P S0402C115 103P S0402C116 103P S0402C117 103P S0402C118 103P S0402C119 103P S0402C120 103P S0402C121 0R S0402

MAIN UNIT

VOL UNIT


C122 475P/25V S0805C123 NC S0402C124 NC S0402C125 121P/J S0402C126 121P/J S0402C127 0R S0402C128 27P/J S0402C129 39P/J S0402C130 12P/J S0402C131 12P/J S0402C132 12P/J S0402C133 56P/J S0402C134 56P/J S0402C135 56P/J S0402C136 475P/16V S0603C137 475P/16V S0603C138 105P/16V S0402C139 6P/B S0402C140 6P/B S0402C141 6P/B S0402C142 102P/J S0402C143 102P/J S0402C144 102P/J S0402C145 102P/J S0402C146 7P/B S0402C147 7P/B S0402C148 221P/J S0402C149 221P/J S0402C150 221P/J S0402C151 221P/J S0402C152 221P/J S0402C153 104P S0402C154 104P S0402C155 6P/B S0402C156 22P/J S0402C157 101P/J S0402C158 101P/J S0402C159 101P/J S0402C160 101P/J S0402C161 101P/J S0402C162 101P/J S0402C163 101P/J S0402C164 101P/J S0402C165 20P/J S0402C166 20P/J S0402C167 13P/J S0402C168 16P/J S0402C169 NC S0805C170 NC S0805C171 103P S0402C172 103P S0603C173 103P S0603C174 103P S0603C175 471P S0603C176 103P S0603C177 103P S0603C178 103P S0603C179 151P/J S0402C180 151P/J S0402C181 103P S0402


C182 225P/10V S0402C183 181P/J S0402C184 104P S0402C185 104P S0402C186 104P S0402C187 104P S0402C188 104P S0402C189 104P S0402C190 103P S0402C191 103P S0402C192 103P S0402C193 103P S0402C194 103P S0402C195 103P S0402C196 103P S0402C197 103P S0402C198 103P S0402C199 103P S0402C200 102P/J S0402C201 102P/J S0402C202 102P/J S0402C203 102P/J S0402C204 102P/J S0402C205 821P/J S0402C206 33P/J S0402C207 33P/J S0402C208 33P/J S0402C209 223P S0402C210 101P/J S0402C211 101P/J S0402C212 101P/J S0402C213 225P/10V S0402C214 225P/10V S0402C215 221P/J S0402C216 683P S0402C217 123P S0402C218 333P S0402C219 225P/10V S0402C220 225P/10V S0402C221 222P S0402C222 103P S0402C223 NC S0402C224 225P/25V S0805C225 103P S0402C226 56P/HJ S0805C227 36P/HJ S0805C228 39P/HJ S0805C229 33P/HJ S0805C230 472P S0402C231 152P/HJ S1206C232 152P/HJ S1206C233 152P/HJ S1206C234 331P/J S0402C235 103P S0603C236 103P S0603C237 103P S0603C238 224P S0402C239 102P S0603C240 102P S0603C241 331P/J S0603


C242 391P/J S0603C243 NC S0603C244 224P S0402C245 224P S0402C246 391P/J S0603C247 68P/J S0603C248 103P S0402C249 103P S0402C250 103P S0402C251 103P S0402C252 392P/J S0402C253 391P/J S0402C254 101P/J S0402C255 39P/HJ S0805C256 101P/HJ S0805C257 68P/HJ S0805C258 101P/HJ S0805C259 47P/HJ S0805C260 101P/HJ S0805C261 68P/HJ S1206C262 331P/HJ S1206C263 102P S0603C264 103P S0603C265 102P S0603C266 181P/J S0603C267 101P/J S0603C268 43P/J S0603C269 472P S0402C270 103P S0402C271 104P S0402C272 103P S0402C273 NC S0402C274 NC S0402C275 104P S0402C276 NC S0402C277 NC S0402C300 475P/16V S0603C301 103P S0402C302 105P/16V S0402C303 225P/10V S0402C304 105P/16V S0402C305 104P S0402C306 225P/10V S0402C307 105P/16V S0402C308 103P S0402C309 103P S0402C310 103P S0402C311 104P S0402C312 104P S0402C313 103P S0402C315 104P S0402C316 104P S0402C317 104P S0402C318 104P S0402C319 104P S0402C320 104P S0402C321 224P S0402C322 103P S0402C323 103P S0402C324 103P S0402


C325 102P S0402C326 681P/J S0402C327 183P S0402C328 473P S0603C329 473P S0603C330 104P S0402C331 104P S0603C332 103P S0603C333 103P S0603C334 103P S0402C335 103P S0603C336 103P S0603C337 103P S0402C338 103P S0402C339 103P S0402C340 472P S0402C341 475P/16V S0603C342 NC S0402C343 105P/16V S0402C344 104P S0402C345 104P S0402C346 47P/J S0402C347 475P/16V S0603C348 103P S0402C349 105P/16V S0402C350 103P S0402C351 103P S0603C352 271P/J S0402C353 56P/J S0402C354 475P/16V S0603C355 475P/16V S0603C356 103P S0402C357 104P S0402C358 104P S0402C359 103P S0402C360 473P S0402C362 102P S0603C363 102P S0603C364 102P S0603C365 151P/J S0402C366 104P S0402C367 104P S0402C368 104P S0402C369 104P S0402C370 104P S0402C371 104P S0402C372 104P S0402C373 273P S0402C374 102P S0402C375 103P S0603C376 NC S0402C377 224P S0603C378 103P S0603C379 103P S0603C380 103P S0603C381 103P S0603C382 222P S0402C383 222P S0402C384 NC S0402C385 NC S0402


C386 NC S0402C387 NC S0402C388 NC S0402C389 NC S0402C390 NC S0402C391 NC S0402C392 NC S0402C393 NC S0402C394 NC S0402C395 NC S0402C396 NC S0402C397 NC S0402C398 NC S0603C399 NC S0402C400 NC S0402C401 NC S0402C500 104P S0603C501 104P S0603C502 103P S0603C503 103P S0603C504 103P S0603C505 103P S0603C506 103P S0402C507 103P S0402C508 103P S0402C509 103P S0402C510 103P S0402C511 103P S0402C512 103P S0402C513 103P S0402C514 103P S0402C515 103P S0402C516 103P S0402C517 471P/J S0402C518 471P/J S0402C519 225P/10V S0402C520 225P/10V S0402C521 225P/10V S0402C522 225P/10V S0402C523 475P/16V S0603C524 105P/16V S0402C525 105P/16V S0402C526 105P/25V S0603C527 333P S0603C528 105P/25V S0603C529 105P/25V S0603C530 103P S0603C531 103P S0603C600 NC S0402C601 NC S0805C602 NC S0402C603 NC S0603C604 NC S0402C605 NC S0402C606 NC S0402C607 NC S0402C608 NC S0402C609 NC S0402C610 NC S0402C611 NC S0402


C612 NC S0402C613 NC S0402C614 NC S0402C615 NC S0402C616 NC S0402C617 NC S0402C618 NC S0402C619 NC S0402C622 NC S0402C623 NC S0402C625 NC S0402C626 NC S0402C627 NC S0402C651 225PA S0402C652 225PA S0402C653 225PA S0402C654 104PC S0402C655 104PC S0402C656 104PC S0402C658 101PH/J S0402C659 221PH/J S0402C660 NC S0402C661 NC S0402C700 103P S0402C701 103P S0402C702 103P S0402C703 103P S0402C704 103P S0402C705 103P S0402C706 102P S0402C707 103P S0402C708 102P S0402C709 103P S0402C710 104P S0402C711 103P S0402C712 103P S0402C713 103P S0402C714 225P/10V S0402C715 103P S0402C716 225P/10V S0402C717 103P S0402C718 103P S0402C719 103P S0402C720 8P/B S0402C721 8P/B S0402C722 103P S0402C723 103P S0402C724 103P S0402C725 103P S0402C726 104P S0402C727 105P/16V S0402C728 103P S0402C729 103P S0402C730 104P S0402C731 103P S0402

CB100 10.695MHZ M10.7CF100 LT455HT K455E5D100 1SS400 SOD523D101 1SS400 SOD523D102 1SS400 SOD523


D103 1SS400 SOD523D104 1SS400 SOD523D105 1SS400 SOD523D107 1SS400 SOD523D108 1SS356 SOD323D109 1SS356 SOD323D110 1SS356 SOD323D111 NC SOT523-123D112 JDV2S14E(FH) SOD523D113 JDV2S14E(FH) SOD523D114 JDV2S14E(FH) SOD523D115 BAR43S SOT23-123(1)D116 BAR43S SOT23-123(1)D117 BAR43S SOT23-123(1)D118 1N728WS SOD323D119 1N728WS SOD323D120 LL4148 SOD80D121 LL4148 SOD80D122 BA892 SOD523D123 BA892 SOD523D300 1SS400 SOD523D301 1SS400 SOD523D302 12V SOD523D303 PMBD353 SOT23-123(1)D304 1SS400 SOD523D305 1SS355 SOD323D306 1SS355 SOD323D307 1SS400 SOD523D308 3V3 SOD523D309 1SS400 SOD523D310 1SS400 SOD523D500 B540C DO-214ABD501 SM540BF SMB-FLD502 SM540BF SMB-FLD503 5V6 SOD323D600 NC SOD523D601 NC SOT523-123D703 ESDBL3V3F1 DFN1006D704 DTESDBLC5V0LED02 DFN1006D705 DTESDBLC5V0LED02 DFN1006D706 ESDBL3V3F1 DFN1006D707 ESDBL3V3F1 DFN1006D708 ESDBL3V3F1 DFN1006D709 ESDBL3V3F1 DFN1006D710 ESDBL3V3F1 DFN1006D711 ESDBL3V3F1 DFN1006D712 ESDBL3V3F1 DFN1006D713 ESDBL3V3F1 DFN1006D714 ESDBL3V3F1 DFN1006D715 ESDBL3V3F1 DFN1006E100 ANT ANTE300 100uF/25V SRB0.125(6MM)E301 100uF/25V SRB0.125(6MM)E302 470uF/25V SRB0.160(8MM)E303 470uF/25V SRB0.160(8MM)E500 470uF/25V SRB0.160(8MM)E501 470uF/25V SRB0.160(8MM)E502 100uF/25V SRB0.125(6MM)E503 220uF/16V SRB0.125(6MM)E504 100uF/16V SRB0.10(5MM)


E505 100uF/16V SRB0.10(5MM)E507 470uF/25V SRB0.160(8MM)E508 470uF/10V SRB0.125(6MM)J300 SP SIP2T2J500 RH3.5X1.0X12.0 DC-1.0/2.5MM-V1.0J502 5V 2.1A SIP2T2J701 CON3 CON2.0-3J702 CON10 SIP2T10J703 0.5S-1-12PB SIPM12J704 0.5S-1-10PB SIPM10

JK300 EX SP PJ-302JK301 PA SP PJ-302JK302 EXT-MIC EJ-2503-35-GPK300 HLS6-4100H-DC12V HLS6-4100HL100 FHW0805UC1R0JGT S0805L101 NC S0805L102 NC S0805L103 FHW0805UCR33GGT S0805L104 FHW0805UCR33GGT S0805L105 FHW0805UCR33GGT S0805L106 NLV25T-1R0J S2520L107 NLV25T-1R0J S2520L108 NLV25T-1R0J S2520L109 22uH S0603L110 6.8uH S0603L111 NLV32T-471J S3225L112 NLV32T-101J S3225L113 470nH S0603L114 8.2uH S0603L115 JMPL116 NC S2520L117 0R S0603L118 NCL119 6.5TRL120 6.5TRL121 6.5TRL122 6.5TRL123 3.5TRL124 WBRID-237555 WBRID-2375XXL125 WBRID-237555 WBRID-2375XXL126 3.5(2DU)L127 4.5TRL128 5.5TRL129 100nH S0603L130 FHW0805UCR33GGT S0805L131 220nH S0603L300 10uH S0603L301 DK3*5*1 AXIAL10L302 10uH S0603L500 HMI0630-100M INDUCTORS-7.8*7.0MML501 CBM100505U301T S0402L502 CBM100505U301T S0402L503 LWS33-0009 L7*13L504 HMI0530-4R7M LWS-5952L600 NC S0603L601 NC S0603L602 NC S0603L603 NC S0603L650 CBM100505U221T S0402L651 220nH S0402


L700 CB-LJX-0097 JMPQ100 RT1N141U EMT3Q101 RT1N141U EMT3Q102 RT1N141U EMT3Q103 MMBTSC2714Y SOT23Q104 MMBTSC2714Y SOT23Q105 MMBTSC2714Y SOT23Q106 MMBTSC2714Y SOT23Q107 MMBTSC2714Y SOT23Q108 MMBTSC2714Y SOT23Q109 MMBTSC2714Y SOT23Q110 KTC3770S-B SOT23Q111 MMBTSC2714Y SOT23Q112 2SC4082 SC70Q113 2SC2714(QY) SOT23Q114 2SC2714(QY) SOT23Q115 KTC3875S(GR) SOT23Q116 KTC3875S(GR) SOT23Q117 LMBT3906LT1G SOT23Q118 IRF520 TO-220AB-DDDQ119 IRF520 TO-220AB-DDDQ120 IRF520 TO-220AB-DDDQ121 2SC2314(F) TO126Q122 RT1N141U EMT3Q300 RT1N141U EMT3Q301 RT1N141U EMT3Q302 RT1N141U EMT3Q303 RT1N141U EMT3Q304 RT1N141U EMT3Q305 RT1N141U EMT3Q306 TIP36C TO-247(3P)Q307 2SB1132 SOT89Q308 KTC3875S(GR) SOT23Q309 LMBT3906LT1G SOT23Q310 LMBT3906LT1G SOT23Q311 2SC2712(GR) SOT23Q312 RT1N141U EMT3Q313 L2SD1781KRLT1G SOT23Q314 2SC2412K(R) SOT23Q317 UMC5N SOT353Q318 DTC114YKA SOT23Q500 2SB1132 SOT89Q501 UMC5N SOT353Q502 UMC5N SOT353Q503 RT1N141U EMT3R100 330R S0805R101 3K3 S0402R102 3K3 S0402R103 3K3 S0402R104 2K4 S0402R105 4K7 S0402R106 1K S0402R107 1K S0402R108 1K S1206R109 470R S0402R110 470R S0402R111 470R S0402R112 470R S0402R113 470R S0402R114 470R S0402


R115 470R S0402R116 4K7 S0402R117 10K S0402R118 10K S0402R119 10K S0402R120 10K S0402R121 10K S0402R122 10K S0402R123 10K S0402R124 10K S0402R125 10K S0402R126 10K S0402R127 10K S0402R128 10K S0402R129 100K S0402R130 100K S0402R131 100K S0402R132 100K S0402R133 100K S0402R134 100K S0402R135 100K S0402R136 100K S0402R137 330R S0402R138 220R S0402R139 220R S0402R140 220R S0402R141 220R S0402R142 330K S0402R143 330K S0402R144 240K S0402R145 10R S0402R146 1K S0402R147 1K S0402R148 1K S0402R149 0R S0805R150 0R S0402R151 220R S0402R152 0R S0402R153 470R S0402R154 220K S0402R155 3K9 S0402R156 1K5 S0402R157 1M S0402R158 1M S0402R159 3K3 S0402R160 3K3 S0402R161 220R S0402R162 680R S0402R163 680R S0402R164 100R S0402R165 22K S0402R166 22K S0402R167 2K2 S0402R168 2K2 S0402R169 2K2 S0402R170 2K2 S0402R171 510R S0402R172 150R S0603R173 2K2 S0402R174 150R S0603


R175 47R S0402R176 15R S0402R177 33K S0402R178 39K S0402R179 47K S0402R180 47K S0402R181 47K S0402R182 47K S0402R183 47K S0402R184 39K S0402R185 47K S0402R186 330R S0402R187 330R S0402R188 470K S0402R189 4K7 S0402R190 0R S0603R191 150K S0402R192 2K4 S0402R193 120K S0402R194 22K S0402R195 68K S0402R196 68K S0402R197 33K S0402R198 47K S0402R199 10K S2010R200 120R S0805R201 82R S0805R202 330R S1206R203 270R S0603R204 330R S0805R205 1K2 S1206R206 270K S0603R207 820R S0805R208 300K S0603R209 100K S0402R210 2K2 S0603R211 15R S0603R212 10R S0402R213 82R S0402R214 8K2 S0402R215 390R S0402R216 47K S0402R217 56R S0402R218 56R S0402R219 220R S0402R220 220R S0402R221 220R S0402R222 5K1 S0402R223 12K S0402R224 220K S0402R225 220K S0402R226 39K S0603R227 5R6 S0805R228 100K S0402R229 100K S0402R230 150K S0402R231 150K S0402R232 220R S0402R233 12K S0402R234 10K S0402


R235 10K S0402R236 NC S0805R300 1K8 S0402R301 5K6 S0402R302 4K7 S0402R303 560R S0402R304 30K S0402R305 47K S0402R306 56K S0603R307 39K S0402R308 NC S0402R309 NC S0402R310 2K2 S0402R311 6K8 S0402R312 3K9 S0402R313 15K S0402R314 10K S0402R315 12K S0402R316 15K S0402R317 10K S0402R318 10K S0805R319 12K S0402R320 10K S0402R321 22K S0402R322 10K S0402R323 10K S0402R324 10K S0402R325 10K S0402R326 10K S0402R327 1K S0402R328 10K S0402R329 10K S0402R330 8K2 S0402R331 100K S0402R332 100K S0402R333 100K S0402R334 100K S0402R335 100K S0402R336 100K S0402R337 100K S0402R338 1M S0402R339 1M S0402R340 NC S0402R341 220K S0402R342 220K S0402R343 220K S0402R344 820K S0402R345 270K S0402R346 8K2 S0402R347 2K7 S0402R348 4K7 S0402R349 8K2 S0402R350 1K S0402R351 1K S0402R352 1K S0402R353 1K S0402R354 1K S0402R355 22K S0402R356 22K S0402R357 22K S0402


R358 2K2 S0402R359 2K2 S0402R360 2K2 S0402R361 2K2 S0402R362 3K3 S0805R363 3K3 S0402R364 3K3 S0402R365 5K6 S0402R366 5K6 S0402R367 5K6 S0402R368 10K S0402R369 4K7 S0402R370 2K S0402R371 220R S0402R372 220R S0603R373 1K S0402R374 1K S0402R375 56K S0402R376 100R S0402R377 220K S0402R378 220K S0402R379 47K S0402R380 33K S0402R381 560R S0805R382 15R S0805R383 39K S0402R384 NC S0402R385 2K2 S0402R386 1K S0402R387 22R S0805R388 22R S0402R389 0R S0402R390 100R S1206R391 220K S0402R392 100K S0402R393 150K S0402R394 330K S0402R395 560K S0402R396 30K S0402R397 100K S0402R398 2K2 S0402R399 47K S0402R400 2K2 S0603R401 100K S0603R402 51R S0805R403 3K9 S0402R404 470R S0603R405 1K S0402R406 22K S0402R407 1K S0402R408 1K S0402R409 12K S0402R410 47K S0402R411 NC S0402R412 NC S0402R413 NC S0402R414 NC S0402R415 NC S0402R416 NC S0402R417 NC S0402


R418 NC S0402R419 NC S0402R420 NC S0402R421 NC S0402R422 NC S0402R500 47K S0603R501 1K S0603R502 10K S0402R503 0.091R/F S1206R504 0.091R/F S1206R505 10.5K/F S0603R506 3.3K/F S0603R600 NC S0603R601 NC S0402R602 NC S0402R603 NC S0402R604 NC S0402R700 4K7 S0402R701 4K7 S0402R702 10K S0402R703 10K S0402R706 100R S0402R707 100R S0402R708 100R S0402R709 100R S0402R710 100R S0402R711 100R S0402R712 10K S0402R713 100R S0402R714 100R S0402R715 100R S0402R716 100R S0402R717 100R S0402R718 100R S0402R719 NC S0402R720 10K S0402R721 100K S0402R722 10K S0402R723 10K S0402R724 100R S0402R725 10K S0402R726 10K S0402R727 NC RES0.4(1/4W)R728 22K S0402R729 10K S0402R730 10R S0402R731 150K S0402R732 47K S0402R733 68K S0402R734 2K2 S0402R735 NC S0402

Shield100 CB-PBJ-0061 WALKER-S1-V1.0Shield101 CB-PBJ-0062 WALKER-S2-V2.0Shield650 CB-PBJ-0058 CB-VCOA

TP600 NC TEST POINT 1U100 TA75S01F SOT25U101 AA32416 SSOP16U104 BA2904SFV ICS-SSOP-B8U300 TA75S01F SOT25U301 BA2904SFV ICS-SSOP-B8


U302 UTC-M62364 SSOP24U303 SGM8272YMS8G/TR ICS-MSOP8U304 SGM4157YC SOT363U305 YD1517P SDIP18U306 SGM4157YC SOT363U307 BA2904SFV ICS-SSOP-B8U308 NC SOT363U309 NC MSOP10(0.5)U310 NC SOL-16U500 ME6118A50B3G SOT223-123U501 L7808CV TO220-V-123-V2.0U502 ME6206-33M SOT23-123U503 ME6206-33M SOT23-123U504 XL4201 SOP8-EU600 NC QFN4X4-20U601 NC SOT23-123U650 QA8558 QFN4X4-20U701 GD32F330RBT6 SQFP10X10-64X600 NC XTAL3.2*2.5X650 QSSMD-0064 TCXO-2520X700 12MHZ XTAL3.2*2.5Y100 10.24MHZ XTAL_SMD5032Y101 JTBM455C24 K450V2

WALKER II EU Testing mode

。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。

Note：Testing voltage 13.2V/27,205Mhz 。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。

Test mode: In radio off status, Knob CB/PA：in CB position, Knob EMG1：Off position ,Knob

ANL/NB/HICUT：off position, Press PTT + Mode + F + turn on radio and enter

into testing mode, Press microphone [UP] or [DN] to adjust menu ,turn channel

knob to adjust parameter.

AM/FM LP adjustment： In testing mode, select PL channel, turn off the signal of

modulation, Under the launching state Rotary channel switch adjust the power to 3.8W

FM deviation testing mode： In testing mode, select FM channel, 1.25k 30mV,

Under the launching state Rotary channel switch adjust the deviation to 1.8Khz

Note：MIC GAIN turned full clockwise

AM LP amplitude adjustment：In testing mode, select AL channel, 1.25K 30mV,

Under the launching state Rotary channel switch adjust the amplitude to 87%


AM HP amplitude adjustment：In testing mode, select AM channel, 1.25K 30mV,

Under the launching state Rotary channel switch adjust the amplitude to 90%


PC BOARD VIEWS

WALKER II EU

W A L K E R I I E U

SCHEMATIC DIAGRAM

R111470R

R110470R

L103

FHW

0805

UC

R33

GG

T

L104

FHW

0805

UC

R33

GG

T

L105

FHW

0805

UC

R33

GG

T

8RR11710K

R1164K7

R1471K

R142330K

R1500R

R137330R

L100

FHW

0805

UC

1R0J

GT

R112470R

D1101SS356

D1081SS356

Q103MMBTSC2714Y

R1042K4

R1054K7

R109470R

Q10

4

MM

BT

SC27

14Y

R100330R

R14510R

8R

R1461K

D11

2JD

V2S

14E(

FH)

R129100K

D11

3JD

V2S

14E(

FH)

R130100K

D11

4JD

V2S

14E(

FH)

R131100K

8T

D1031SS400

D1001SS400

D1021SS400

L102

NC

L101

NC

D1091SS356

R1013K3

D1011SS400

D111NC

R1061K D104

1SS400

CB100

10.695MHZ

L110

6.8uHL109

22uH

L106

NLV

25T-

1R0J

R167

2K2

R152

0R

R11910K

R114

470R

Q114

2SC2714(QY)

R165

22K

Q105

MMBTSC2714Y

R132100K

R162

680R

R17547R

R176

15R

L112

NLV

32T-

101J

R118

10K

R151220R

R171510R

R164100R

8V

D105

1SS400

R113470R

Q113

2SC2714(QY)

R138220R

IN1 OUT 5

22

33

44

CF100

LT455HT

R1561K5

L111

NLV

32T-

471J

R159

3K3

R1571M

R161220R

8V

L107

NLV

25T-

1R0J

L108

NLV

25T -

1R0J

8V

R163680R

Q10

6M

MB

TSC

2714

Y

R12010K

R17733K

L113

470n

H

R1692K2

Q10

7M

MB

TSC

2714

Y

R17839K

R115470R

Q10

8M

MB

TSC

2714

Y

R17947K

R141220R

R140220R

R139220R

L1148.2uH

23

1

D115BAR43S

R18047K

Q11

5K

TC38

75S(

GR

)

R186330R

R18147K

R188470K

Q11

6K

TC38

75S(

GR

)

R18547K

R12110K

R12210K

Q117LMBT3906LT1G

R12810K

R12310K

R136100K

Q109MMBTSC2714Y

8N

R1682K2

R1922K4

R125

10K

R187330R

5V

Y10

1JT

BM

455C

24

OSC

IN

1

OSC

OU

T2

MIX

OUT

3

VC

C4

IF I

N5

DE

C6

FIL

OU

T

FIL

IN

AF

OU

T9

QU

AD

10

IF O

UT11

RSSI

12N

-DET

13

N-R

EC

14

GN

D15

MIX

IN

16

U101AA32416

R18247K

R1481K

R19733K

R12610K

R19668K

R19568K

R134100K

R135100K

8V

R143330K

23

1

D117BAR43S

R18439K

R1581M

R12710K

R19422K

R19847KD107

1SS400

R16622K

Q102RT1N141U ANL-EN

R191150K

R209100K

23

1

D116BAR43S

R12410K

R133100K

AG

C

R1894K7

Q101RT1N141U

3

14

52

U100

TA75S01F

8V

RX

-IF

RX

-IF

RX

-RF

1LO

NB

-IN

NB

-OUT

NB

-OU

T

NB

-IN

PLL-D

ATA

RX

-IF

SQ

RX

-IF

AG

C

RFG

RFG

FRMUT

RX-AF

ASC

L1196.5TR

L1206.5TR

R19910K

L1233.5TR

AM MOD

Q119

IRF520

R1081K

R206270K

Q118

IRF520

R2051K2

R207820R

R202330R

Q120

IRF520R208300K

L127

4.5T

R

Q1212SC2314(F)

R2275R6

R203270R

R2102K2

1 2

3 4

L1263.5(2DU)

L125

WB

RID

-237

555

8T

D12

0LL

4148

D12

1LL

414 8

R22639K

L124WBRID-237555

L1285.5TR

R204330R

L129100nH

E100ANT

R224220K

R225220K

Q110KTC3770S-B

L130

FHW

0805

UC

R33

GG

T

R21856R

R2148K2

R1732K2

Q111MMBTSC2714Y

R215390R

R21210R

R21647K

8T

R1023K3

8R

D123BA892

L131220nH

PLL

-TR

X

PLL

-DA

TA

PLL

-CL

K

R220220R

R221220R

R1702K2

R1033K3

D122BA892

RX

-RF

R172150R

R174150R

R211

15R

R190

0R

FTA

F

R219220R

5V

R21756R

R200120R

R20182R

D1191N728WS

D1181N728WS

L115JMP

L1216.5TR

L1226.5TR

AM MOD

AG

C

1LO

8T

FTA

F

PLL-T

R X

PLL-D

ATA

PLL-C

LK

FTA

F

PLL

-TR

X

PLL

-CL

K

PLL

-DA

TA

AN

L-E

N

AR

MU

T

RX

-AF

ARM

UT

RX

-AF

AN

L-EN

FRM

UT

SQRFG

FRM

UT

RFG SQ

ASC

ASC

SWR

CA

LL

SWR

CA

LL

SWR

CA

LL

Y10

010

.24M

HZ R107

1K

Q1122SC4082

C16816P/J

R154220K

R153470R

5V

R1553K9

BPF

-VC

BPF

-VC

BPF-V

C

BPF-

VC

321

U104CBA2904SFV

5 67

U104BBA2904SFVR230

150K

R228100K

R231150K

R229100K

84

U104DBA2904SFV

8V

AG

C

AG

C

R232220R

R222

5K1

R22312K

R23312K

R23410K

R23510K C223

NC

C238224P

C119103P

C152221P/J

C120103P

C248103P

C249103P

C173103P

C178103P

C177103P

C172103PC237

103P

C236103P

C239102P

C224225P/25V

C176103P

C235103P

C240102P

C175471P

C264103P

C265102P

C263102P

C174103P

C16713P/J

C125121P/J

C126121P/J

C254101P/J

C269472P

C26843P/J

C24768P/J

C267101P/J

C246391P/J

C266181P/J

C243NC

C241331P/J

C242391P/J

C233152P/HJ

C231152P/HJ

C232152P/HJ

C26168P/HJ

C262331P/HJ

C22933P/HJ

C22736P/HJ

C22839P/HJ

C25

539

P/H

J

C25

610

1P/H

J

C25

768

P/H

J C258101P/HJ

C25947P/HJ

C260101P/HJ

C22656P/HJ

C169NC

C170NC

C250103P

C251103P

C271104P

C275104P

C203102P/J

C118103P

C113103P

C114103P

C115103P

C116103P

C117103P

C234331P/J

C20833P/J

C230472P

C163101P/J

C209223P

C20633P/J

C20733P/J

C204102P/J

C151221P/J

C205821P/J

C145102P/J

C210101P/J

C138105P/16V

C220225P/10V

C198103P

C225103P

C270103P

C194103P

C195103P

C196103P

C197103P

C211101P/J

C21

322

5P/1

0V

C21

422

5P/ 1

0V

C244224P

C245224P

C189104P

C215221P/J

C216683P

C154104P

C217123P

C202102P/J

C164101P/J

C150221P/J

C199103P

C219225P/10V

C221222P

C218333P

C188104P

C222103P

C10233K-NTC

C122475P/25V C103

103PC104103P

C105103P

C10036P/J C101

101P/J

C1210R

C123NC

C273NC

C1270R

C124NC

C274NC

C12939P/J

C106103P

C136475P/16V

C107103P

C13012P/J

C13356P/J

C1396P /B

C142102P/J

C143102P/J

C1467P /B

C108103P C272

103P

C1406P /B C134

56P/J

C109103P

C144102P/J

C1477P /B

C1416P /B

C13556P/J

C1556P /B

C148221P/J

C110103P

C111103P

C137475P/16V

C153104P

C15622P/J

C13112P/J

C13212P/J

C157101P/J

C158101P/J

C159101P/J

C160101P/J

C161101P/J

C162101P/J

C16520P/J

C16620P/J

C112103P

C190103P

C184104P

C183181P/J

C179151P/J

C180151P/J

C12827P/J

C171103P

C181103P

C182225P/10V

C149221P/J

C191103P

C185104P

C186104P

C187104P

C193103P

C200102P/J

C201102P/J

C192103P

Shie ld100CB-PBJ-0061

Q100RT1N141U

Q122RT1N141U

ARMUT

R1490R

L116NC

R236NC

AM TT

AM TT

L1170R

L118

NC

Shield101CB-PBJ-0062

C277NC

C276NC

PLL-STB

PLL-CLK

PLL-DATA

RF

FTA

F

VCO-V3VCO-V3.SCH

PLL-STB

PLL-CLK

PLL-DATA

RF

FTA

F

ASC

SAV

Rectangle

SAV

Rectangle

SAV

Rectangle

W A L K E R I I E U

SCHEMATIC DIAGRAM

3

21

84

U301ABA2904SFV

R332100K

R333100K

R361

2K2

R3308K2

R3381M

D300

1SS400

R32010K

Q309LMBT3906LT1G R370

2K

R356

22K

R3391M

R3541K

Q313L2SD1781KRLT1G

R344820K

R341

220K

R342

220KR343220K

8V

R3472K7 8V

R340NC

R31710K

MIC

MU

T

R35722K

TO

NE

5

67

U301BBA2904SFV

R331100K

Q303

RT1N141U

TX

AF

Q308KTC3875S(GR)

8V

R334100K

R3643K3

R3484K7

AM MOD

Q306TIP36C

Q3072SB1132

R31810K

Q3112SC2712(GR)

R381560R

R38215R

E300100uF/25V

R3675K6

R3665K6

R362

3K3

13V

R372220R

D30212V

R3655K6

Q312RT1N141U

Q310LMBT3906LT1G

R3633K3

5

67

U303BSGM8272YMS8G/TR

R3582K2

R38033K

R37556KR325

10K

R32810K

R32122K

R322

10K

R337100K

R32410K

R335100K

R32310K

R31615K

R31912K

R35522K

R3501K

Q302RT1N141U

AT

MU

T

R345270K

R3468K2

FTA

F

3

21

84

U303ASGM8272YMS8G/TR

4 3A2

U302BUTC-M62364

1 2A1

U302AUTC-M62364

RXEN

L301DK3*5*1

Q304RT1N141U

R371220R

RFG

MIC

MU

T

L30010uH

R3001K8

R303560R

R36810K

R30430K

R30739K

R3024K7

R30547K

3

14

52

U300

TA75S01F

Q300RT1N141U

Q301

RT1N141U

R3015K6

5V

R39630K

R395560K

R38339K

5V

R3852K2

R3498K2

R39947K

R336100K

SPM

UT

TO

NE

B1

1

GN

D2

B0

3A

4

VC

C5

S6

U304SGM4157YC

TX

AF

R32910K

RX

-AF

TB

KE

N

R3271K

5V

R3982K2

1314

A5

U30

2EU

TC-M

6236

4

1615

A6

U302F

UTC-M62364

VC

C5

LD

6

CL

K7

DI

8D

O17

REF

18R

ET

19G

ND

20

U302IUTC-M62364

5V

5V

R3592K2

R3602K2

R3511K

R3521K

R3531K

A/D

-LD

E302

470u

F/2

5V

A/D

-DA

T

A/D

-CL

K

-IN

V1

1

SGN

D2

SVR

R3

OU

T1

4

PGN

D5

OU

T2

6

VP

7

M/S

S8

-IN

V2

9

U305YD1517P

E301100uF/25V

C375103P

13VR38722R

R3694K7

R30656K

13V

R401100K

B12

E11 C1 5

C2 4E23Q317

UMC5N

R4002K2

8V

D3011SS400

E303470uF/25V

12

J300

SP

K300HLS6-4100H-DC12V

13V

R40251R

Q318DTC114YKA

PAE

N

JK300

EX SP

JK301

PA SP

R3123K9

Q3142SC2412K(R)

R378220K

R3116K8

R38822R

R310

2K2

23

1

D303PMBD353

R391220K

R376

100R5V

R392100K

R3731K

R313

15K

R37947K

R394330K

R393

150K

R374

1K

VO

X-IN

MIC-SEL

MIC

-SEL

SB

D3051SS355

D3061SS355

TX

AF

BPF

-VC

R32610K

910

A3

U30

2CU

TC-M

6236

4

R397100K

Q305

RT1N141U

R3861K

R390

100R

R403

3K9

RFG

BPF-VCBPF-VC

RFG

R404470R

D3071SS400AM MOD

R4051K

B1

1

GN

D2

B0

3A

4

VC

C5

S6

U306SGM4157YC

5V

R4081K

VO

X-S

EL

JK302

EXT-MIC

L30210uH

R41047K

R40912K

R40622K

5V

R4071K

VOX-DET

MIC

VO

LH

D3083V3

A/D-DATA/D-DAT

A/D-CLKA/D-CLK

A/D-LDA/D-LD

VO

X

INT-VOX

PAENPAEN

SPMUTSPMUT

TONETONE

RX-AFRX-AF

TBKENTBKEN

MICMUTMICMUT

MICMIC

MIC-SELMIC-SEL

VOX-SELVOX-SEL

ATMUTATMUT

VOXVOX

INT-VOXINT-VOX

VOX-DETVOX-DET

FTAFFTAF

VO

X-IN

INT

-VO

X-IN

VOLHVOLH

RXENRXEN

2122

A7

U30

2GU

TC-M

6236

4

1211

A4

U302DUTC-M62364

2423

A8

U30

2HU

TC-M

6236

4

567

U307BBA2904SFV

C348103P

C382222P

C383222P

C340472P

C301103P

C300475P/16V

C304105P/16V

C343105P/16V C346

47P/J

C308103P

C305104P

C315104P

C316104P

C302105P/16V

C321224P

C322103P

C352271P/J C353

56P/J

C326681P/J

C325102P

C351103P C381

103PC354475P/16V

C320104P

C359103P

C339103P

C35

547

5P/1

6V

C324103P

C349105P/16V

C323103P

C34

747

5P/1

6V

C303225P/10V

C365151P/J

C373273P

C357104P

C358104P

C350103P

C366104P

C367104P

C368104P

C338103P

C370104P

C369104P

C376NC

C372104P

C371104P

C374102P

C377224P

C378103P

C335103P

C336103P

C363102P

C364102P

C337103P

C341475P/16V

C344104P

C313103P

C310103P

C306225P/10V

C360473P

C345104P

C309103P

C319104P

C327183P

C356103P

C317104P

C330104P

C318104P

C328473P

C362102P

C329473P

C331104P

C332103P

C333103P C379

103PC380103P

C334103P

ESCLESCL

ESDAESDA

C390NC

B1 1

GND 2

B0 3A4

VCC5

S6

U308NC R416

NCR417NC

C388NC

R421NC

C397NC

R415NC

C387NC

C386NC

C391

NC

R418NC

R419NC C389

NC

R420NC

C392NC

C393NC

C396NC

R422NC

5V

C398NC

VC

C1

REF

2

AG

ND

3

DG

ND

4

CLK

5

VC

O6

CCI

7

CCO

8O

P1-O

UT

9

OP1

-IN

10

OP2

- OU

T11

OP2

-IN

12

LPF

2-IN

13

LPF2

-OU

T14

LPF1

-OU

T15

LPF

1-IN

16

U310NC

C399NC

C400NC

C401NC

R413

NC

C395NC

5V

C394NC

VOX-IN

5V

ESDA

ESCL R384

NC

R411NC

C342NC

R414

NC

C385NC

R309NC

A01

SCL2

SDA3

VSS4

P1B5 P1W 6

P0W 7

P0B 8

A1 9

VDD 10

U309NC

C384NC

R412NC

R308NC

D3041SS400

TO

NE

-C

D3091SS400

D3101SS400C307

105P/16VR377220K

R31512K

C312104P

R31410K

TO

NE

-D/A

C311104P

TO

NE

-C

TONE-D/ATONE-D/A

R389

0R

W A L K E R I I E U

SCHEMATIC DIAGRAM

C651225PA

C656104PC

C655104PC

C654104PC

3V3

C658101PH/J

PLL-STB

PLL-CLK

PLL-DATA

RF

FTAF

C653225PA

C652225PA

L650CBM100505U221T

Shield650CB-PBJ-0058

C661NCC660

NC

XOUT 3GND2

VC1 VCC 4

X650

QSSMD-0064

C659

221PH/J

L651

220nH

VCC

D0 1VDD 2

XI 3XO 4

BUSM 5SPK

6

AV

DD

7

MIC

N8

MIC

P9

RFI

10

RFO11

NC12

BAIS13

SCL14

SCN15

SDA

16

D4

17

D3

18

D2

19

D1

20

G21

U650

QA8558

VCC

W A L K E R I I E U

SCHEMATIC DIAGRAM

X70012MHZ

XOUT

XIN

XOUTXIN

NRSTRXDTXD

VBAT1

PC13/RTC2

PC14/OSC32I3

PC15/OSC32O4

OSCI5

OSCO6

NRST7

PC0/AD108

PC1/AD119

PC2/AD1210

PC3/AD1311

VSSA12

VDDA13

PA0/AD014

PA1/AD1/TM2215

PA2/UT2/AD216

PA3/

UR

2/A

D3

17

VS

18

VD

19

P A4/

AD

4/T

M14

120

PA5/

AD

521

PA6/

AD

6/T

M31

22

PA7/

AD

7/T

M32

23

PC4/

AD

1424

PC5/

AD

1525

PB0/

AD

8/T

M33

26

PB1/

AD

9/T

M34

27

PB2/

V28

PB10

/SC

L2/

TM

23/V

29

PB11

/SD

A2/

TM

24/V

30

VSS

31

VD

D32

PB12/V 33PB13/TM11N/V 34PB14/TM12N/V 35PB15/TM13N/V 36PC6/TM31/V 37PC7/TM32/V 38PC8/TM33/V 39PC9/TM34/V 40PA8/TM11/V 41PA9/UT1/TM12/V 42PA10/UR1/TM13/V 43PA11/TM14/V 44PA12/V 45-PA13/V 46VS 47VD 48

-PA

14/V

49-P

A15

/V50

PC10

/ V51

PC11

/ V52

PC12

/V53

PD2/

TM

3-E

TR

/V54

PB3/

TM

22/V

55-P

B4/

TM

31/V

56PB

5/T

M32

/V57

PB6/

SCL1

/V58

PB7/

SDA

1/V

59B

OO

T0

60PB

8/V

61PB

9/V

62V

SS63

VD

D64

U701GD32F330RBT6

3M3

3M3

R719NC

R71210K

3M3

SQASC

CA

LLSW

R

INT

-VO

X

VO

X

PTT

VOLH

KEY1

KEY2

KEY3

CH-UP

CH-DN

MIC

LCD-CLK

LCD-DAT

LCD-CS

SQ-A/DVOL-A/DRFG-A/DPOW-A/DMICG-A/D 1

2345678910

J702CON10

3M313V

13.2V

R73

010

R

123456789101112

J7030.5S-1-12PB

3M3

R721100K

R72210K

R72010K

R72310K

5V

R72910K

PTT

KEY1

KEY3KEY2

SQ-A

/DVOL-A/DRFG-A/DPOW-A/D

MICG-A/D

LCD-CLKLCD-DATLCD-CS

CH

-UP

CH

-DN

AGC

BPF-VCCALLSWRASCSQRFGARMUTANL-ENRX-AF

FRMUTPLL-DATAPLL-CLKPLL-STBFTAF

RFGBPF-VC

A/D-LDPAENSPMUTTONERX-AFTBKENMICMUTMICMIC-SELVOX-SEL

VOXINT-VOXVOX-DETFTAFVOLHRXEN

RXD

TXD

TONE

AR

MU

TA

NL

-EN

ATMUT

PLL

-DA

TA

PLL

-CL

KPL

L-ST

B

RXENTXENNBEN

RX

ENT

XEN

NB

EN

A/D

-LD

PAE

N

SPMUTTBKEN

MICMUT

MIC

-SE

LV

OX

-SEL

VOX-DET

A/D-CLKA/D-DAT

EX

T

A/D

-CL

KA

/D-D

AT

12345678910

J7040.5S-1-10PB13V

LEDR715 100R

R716 100R

R717 100R

R718 100R

R724 100R

D71

1ES

DB

L3V

3F1

D71

2ES

DB

L3V

3F1

D71

3ES

DB

L3V

3F1

D71

4ES

DB

L3V

3F1

D71

5ES

DB

L3V

3F1

R709 100RR710 100RR711 100RR713 100RR714 100R

D70

6ES

DB

L3V

3F1

D70

7ES

DB

L3V

3F1

D70

8ES

DB

L3V

3F1

D70

9ES

DB

L3V

3F1

D71

0ES

DB

L3V

3F1

R703R702

3M3

R706 100R

R707 100R

R708 100R

D70

3ES

DB

L3V

3F1

D70

4D

TES

DB

LC5V

0LED

02

D70

5D

TES

DB

LC5V

0LED

02

R7004K7

R7014K7

3M3

LE

D

ATMUT

3

21

84

U307A

BA2904SFV

METER-D/A

R72510K

METER

METER

METER-D/A

CALLSWRINT-VOX

VOX-DET

R72610K

3M3

NRST

C707103P

C709103P

C711103P

C713103P

C715103P

C701103P

C702103P

C703103P

C704103P

C705103P

C700103P

C706102P

C708102P

C717103P

C718103P

C719103P

C728103P

C725103P

C730104PC724

103PC716225P/10V

C722103P

C714225P/10V

C7208P /B

C7218P /B

C723103P

C710104P

C726104P C712

103PC727105P/16V

C729103P

EXT

R72822K

R731150K

1 2 3

J701CON3

L700

CB

-LJX

-009

7

R732

47K

R727NC

3M3R73368K

C731103P

R7342K2

R735NC

5V

ESCLESDA

ESCLESDA

FRM

UT

TONE-D/A

TONE-D/A

FTAFPLL-TRXPLL-CLK

PLL-DATA

ARMUT

RX-AFANL-EN

FRMUT

RFGSQ

SWRCALL

BPF-VC

AGC

RF-V3RF-V3.SCH

FTAFPLL-TRXPLL-CLK

PLL-DATA

ARMUT

RX-AFANL-EN

FRMUT

RFGSQ

ASCSWR

CALLBPF-VC

AGC

WX-V3

RFGBPF-VC

A/D-DATA/D-CLK

A/D-LDPAEN

SPMUTTONERX-AF

TBKENMICMUT

MICMIC-SELVOX-SEL

ATMUTVOX

INT-VOXVOX-DET

FTAFVOLHRXEN

ESCLESDA

TONE-D/A

AF-V3AF-V3.SCH

RFGBPF-VC

A/D-DATA/D-CLK

A/D-LDPAEN

SPMUTTONERX-AF

TBKENMICMUT

MICMIC-SELVOX-SEL

ATMUTVOX

INT-VOXVOX-DET

FTAFVOLHRXEN

ESCLESDA

TONE-D/A

RXENTXENNBEN

PWR-V3PWR-V3.SCH

RXENTXENNBEN

10K 10K

W A L K E R I I E U

SCHEMATIC DIAGRAM 8V

J500RH3.5X1.0X12.0 E502

100uF/25V

13V

E503220uF/16V

SB

Vout 3

Vss

1

Vin2

U503

ME6206-33M

5V

L501CBM100505U301T

E500470uF/25V E501

470uF/25V

L500HMI0630-100M

D500B540C

Vin3V

ss1

Vout 2

U500ME6118A50B3G8V

E504100uF/16V

5V

E505100uF/16V

C515103P

3V3

Vout 3

Vss

1

Vin2

U502

ME6206-33M

5V

L502CBM100505U301T

3M3

B1 2

E1 1C15

C24 E2 3Q501

UMC5N

8N 8V

B1 2

E1 1C15

C24 E2 3Q502

UMC5N

8R 8V

RXEN TXEN

NBEN

Q5002SB1132

R50047K

R5011K

Q503RT1N141U

8T

R50210K

8V

D501SM540BF

Vin1

Vss

2

Vout 3U501

L7808CV

L503

LWS33-0009

R50510.5K/F

R5063.3K/F

R50

30.

091R

/F

CS

5

VC 7

NC 6

NC 1

VIN 8SW2

FB4

GN

D3

U504XL4201

E507

470uF/25V

R50

40.

091R

/F

E508470uF/10V

12

J5025V 2.1A D502

SM540BF

13.2V

13.2V

D5035V6

L504HMI0530-4R7M

C500104P

C502103P

C501104P

C503103P

C504103P

C505103P

C506103P

C507103P

C513103P

C508103P

C509103P

C510103P

C511103P

C521225P/10V

C522225P/10V

C519225P/10V

C520225P/10V

C517471P/J

C518471P/J

C524105P/16V

C525105P/16V

C512103P

C514103P

C516103P

C523475P/16V

C531103P

C530103P

C527333P

C526105P/25V

C529105P/25V

C528105P/25V

W A L K E R I I E USCHEMATIC DIAGRAM

C802103PC

806

225P

/10V

R802100R 3M3

C800103P

C805225P/10V

R80

61K

CS1

NC2

RD3

WR4

DATA5

VSS6

OSCI7

VDD8

VLCD9

IRQ10

BZ11

NC12

BZ13

T114

T215

T316

CO

M0

17

CO

M1

18

NC

19

CO

M2

20

CO

M3

21

CO

M4

22

CO

M5

23

CO

M6

24

CO

M7

25

SEG

026

SEG

127

SEG

228

SEG

329

SEG

430

SEG

531

SEG

632

NC 33NC 34NC 35SEG7 36SEG8 37SEG9 38SEG10 39SEG11 40SEG12 41SEG13 42SEG14 43SEG15 44SEG16 45SEG17 46SEG18 47SEG19 48

NC

49N

C50

NC

51N

C52

SEG

2053

SEG

2154

SEG

2255

SEG

2356

SEG

2457

SEG

2558

SEG

2659

SEG

2760

SEG

2861

SEG

2962

SEG

3063

SEG

3164

U800

TM1622

SEG7SEG8SEG9SEG10SEG11SEG12SEG13SEG14SEG15SEG16SEG17SEG18SEG19

SEG

0SE

G1

SEG

2SE

G3

SEG

4SE

G5

SEG

6

COM

0CO

M1

COM

2CO

M3

COM

4CO

M5

COM

6CO

M7

S802VOX

S803F

R818100K

R817100K

R819100K

R820

100K

R8292K2

3M3

R835

51K

R8282K2

3M3

R834

51K

R8272K2

3M3

KEY3

R803 1K

R804 1KR805 1K

C804103P

11 2 2

3 3

44 5 5S804CGJ-BDKG-0006

12

43

56

J800CB-HKCZ-0012

13V

1234

J802CGJ-JCJ-0467

UART-TXUART-RX

12

J8015V 2.1A

USB 5V

USB GND

R80749.9K/F

R80849.9K/F

R80143.2K/F

R80075K/F

1

2

3

1

2

3

SW800CGJ-BDKG-0006

R810100KR809

100K

R811100K

R812100K

R8232K2

3M3

R83151K

R8222K2

3M3

R83051K

R8212K2

3M3

KEY2

C801103P

1

2

3

1

2

3

SW801CGJ-BDKG-0006

S801MODE

R814100KR813

100K

R815100K

R816100K

R8262K2

3M3

R83351K

R8252K2

3M3

R83251K

R8242K2

3M3

KEY1

C803103P

SEG

20SE

G21

SEG

01

SEG

12

SEG

23

SEG

34

SEG

45

SEG

56

SEG

67

SEG

78

SEG

89

SEG

910

SEG

1011

SEG

1112

SEG

1213

SEG

1314

SEG

1415

SEG

1516

SEG

1617

SEG

1718

SEG

1819

SEG

1920

SEG

2021

SEG

2122

CO

M0

23

CO

M1

24

CO

M2

25

CO

M3

26

CO

M4

27

CO

M5

28

CO

M6

29

CO

M7

30

DS800HSA27718-UPTSZ-01

123

123

SW80

2C

GJ-

BD

KG

-000

6

CO

M0

CO

M1

CO

M2

CO

M3

CO

M4

CO

M5

CO

M6

CO

M7

SEG

0SE

G1

SEG

2SE

G3

SEG

4SE

G5

SEG

6SE

G7

SEG

8SE

G9

SEG

10SE

G11

SEG

12SE

G13

SEG

14SE

G15

SEG

16SE

G17

SEG

18SE

G19

SEG

20SE

G21

D80

0C

ESD

BLC

5V0D

5

VOLH

PTTMIC

12345678910

J8040.5S-1-10PB

13V

VOLHPTT

MIC

UART-TX

UART-RX

DO5

G 2

B 3

GND 4

R 1

DI6

NC7

VDD8

U801TM1829 13V

LE

D

C813475P/16V

C812103P

R838

1K

R8371K

52

64

31 D801R6GHBHC5

2

64

31 D802R6GHBHC5

2

64

31 D807R6GHBHC

R83910R

R84010R

R84133R

52

64

31 D803R6GHBHC5

2

64

31 D804R6GHBHC5

2

64

31 D808R6GHBHC

R84210R

R84310R

R84433R

52

64

31 D805R6GHBHC5

2

64

31 D806R6GHBHC

R845390R

R846390R

R847680R

13V

KEY1

KEY2

KEY3

CH-UP

CH-DN

LCD-CLK

LCD-DAT

LCD-CS

123456789101112

J8030.5S-1-12PB

3M3

LED

CH

-UP

CH

-DN

LCD-CLKLCD-DAT

LCD-CS

R836

10R

C810226P/25V

C811226P/25V

C809226P/25V

R8481K5

ME

BA

K

C808103P

C807103P

PA

OFF

HIC/NB/ANL

EMG1

EMG2

W A L K E R I I E U

13

2W901CGJ-JZKG-0001

13

2

46

5

W902CGJ-QTKG-0053

13

2

87

46

5W903

CGJ-YLKG-0050

SQ-A/DVOL-A/DRFG-A/DPOW-A/DMICG-A/D 1

23456789101112

J702CB-LJX-0107

3M3

13V

13.2V

METER

13V

13.2V

3M3

3M3

SCHEMATIC DIAGRAM

WALKER II EU

BLOCK DIAGRAM

NB RF AMPQ106, Q107

NB DETD115

NB RF AMPQ115, Q1116

NB ATTQ109

1ST RF AMPQ103

1ST MIXER

8R

CB10010.695MHz

MCF

8R

2nd LO

(10.24MH

z) CF100(455KHz)

Q104

10.24MHzY2

8N

(1st LO)

SWRLPFQ118, Q119FINAL AMP

Q120DRIVE AMP

Q121

RF PREDRIVE AMP

ANT

26.965-27.405MHz

Q113IF AMP

D116

AGC DETU100

AGC AMP

U101

FM IF IC

D117

AM DET

(FM)

(AM)

ASC

U307B(2/2)AF AMP

5V

MAIN UNIT

(AM MOD)

(FM MOD)

Y101

ANT SW& ATT

8T LCD UNIT

PLL(CLK, DATA, STB)

TONE

SWR

TBKEN

ASC

VOX

ESCLESDA

INT-VOX

8N 8N

Q317MUTE SW

SPMUT

MPUU701

PTT

VOX-SEL

BPFBPF

SQ

BPF

D500PROTECTOR

(455KHz)

MIC

8V

Q101AGC SW

VOX-DETSPMUT

U800LED-CLK

LCD-CS

LED-DAT

3M3

LCD DRIVE

DS800

COM

0~7

SEG

0~21

LCD

LED DRIVE

U801

LCD BACK LIGHT LED MATRIXD801~D808

LED13V

BPF

BPF

8V

Q114, Q105IF AMP

8V

SC-CON

AGCAGC

U304

MIC-SEL

AF SW

SQ CALL

5V

OSC AMPQ112

TBKEN

5V

VOLUMEW903(1/3)

SQ VRW903(3/3)

RF BPFTUNE

D112,D113

RF BPFTUNED114

BPF-VC

U303B(2/2)DC AMP

Q102ANL SW

ANL-EN

2

1 5

4

MICCONNECTOR

PTT

3

6

13V

U103VCO MODULE

3V3

Q111RF AMP

5V

D123

DET

8R

D122

DET

8T

Q305HIC SW

13V

U305POWER AMP IC

13V

8V

U5005V AVR

5V

Q502DC SW

Q501DC SW

8N 8R

RXENNBEN

Q500DC SW

8T

POWER SWW903(2/3)

13.2V

TXEN

U5033.3V AVR

3V3 U5023.3V AVR

3M3CHAR MODULE

U504

JACK(USB)J502

12MHzX700

U5018V AVR

Q503DC SW

D118SWR DET

U104C (1/2)

DC AMP

U5104B (2/2)

DC AMP

CALLSWR

8V

D119SWR DET

Q110RF AMP

8T

D101U303A(1/2)

RFG AMP

D104

U302F

RFG CONT

Q108 Q117

Q100MUTE SW

FRMUT

Q122MUTE SW

ARMUT

U30

2D

SW CONT

VOLUME CONT

U302A U302B

JACK(EXT SP)JK300

SP

D306,K300SPEAKER SW

PA EN

JACK(PA SP)JK301

Q318PA SW

U301A

8VTONE

Q303,D300

MUTE SW

MICMUT

Q309AGC

Q308,Q313AGC

AMMOD

LPF FILTER

U301B

LPF FILTER5V

Q300

MIC SW

MIC-SEL

MIC AMP CONT

U302HU300

MIC AMP

Q314

MIC AMP

5V

D303

VOX DET

VOX

JACK(EXT MICJK302

U306

MIC SW

VOX-DET

5V

Q13AMC ET

AM MODPOWER REGQ306,Q307

13.2VAM MOD

POWER CONT

AM MUTE SWQ302 ATMUTE

DC AMP

U303B(2/2)U302E

AM AMC CONT

U302FDC AMP

U303A(1/2)

13V

AM MOD CONT

U302G

Q311

D304VOX DET

INT-VOX

METER

POWER VRW901

MIC GAIN VRW902(1/2)

RF GAIN VRW902(2/2)

A/D

-LD

A/D

-CLK

A/D

-DI

U302I

CONT 5V

VOX-SEL

TONE MICMUT

PAENA/F-SEL

RXENTXEN

NBENSC-CON

ANL-EN

13V

S804CH SWCH-UP

CH-DNS802VOX

S803F

KEY3

EMG1/EMG2

SW801

PA/CB

SW802

KEY2

HIC/NB/ANL

SW800KEY1

S801MODE

U307A(1/2)

DC AMPMETER-D/A

U302E

DC CONT

WALKER II - ServiceDocs.Com

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