Panasonic TX-14b4tp b Tc-14b4rp b Ch z185

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Transcript of Panasonic TX-14b4tp b Tc-14b4rp b Ch z185

ORDER No. SM-02011

Colour Television

TX-14B4TP TX-14B4TP/B TC-14B4RP TC-14B4RP/BZ-185 ChassisSPECIFICATIONSPower Source: Power Consumption: Stand-by Power Consumption: 220-240V a.c., 50Hz 39W Terminals: AV1 IN Video (21 pin) 1V p-p 75 Audio (21 pin) 500mV rms 10k RGB (21 pin) Audio (RCA x 1) 500mV rms 10k Video (RCA x 1) 1V p-p 75 Video (21 pin) Audio (21 pin) 1V p-p 75 500mV rms 1k

2.9W

Receiving System:

SECAM B/G , D/K PAL B/G , D/K , H , 525/60 M.NTSC NTSC (AV only)

AV1 OUT

Picture Tube:

A34EAC01X06 34cm

High Voltage: Receiving Channels: VHF E2-E12 VHF H1-H2 (ITALY) VHF A-H (ITALY) VHF R1-R2 VHF R3-R5 VHF R6-R12 UHF E21-E68 CATV (S01-S05) CATV S1-S10 (M1-M10) CATV S11-S20 (U1-U10) CATV S21-S41 (HYPERBAND) Intermediate Frequency: Video/Audio Video 38.9MHz Audio 33.16MHz, 33.4MHz 32.4MHz, 33.05MHz Colour 34.47MHz (PAL) 34.5MHz, 34.65MHz (SECAM) Audio Output: (Music Power)

26.5 1kV 2.5W 8 Impedance

Headphones: Accessories supplied :

8 Impedance 3.5mm Remote Control 2 x R6 (UM3) Batteries

Dimensions: Height: Width: Depth: Net weight:

342mm 366mm 376mm 9.6kg

Specifications are subject to change without notice. Weights and dimensions shown are approximate.

CONTENTSSAFETY PRECAUTIONS..........................................................................................................................................................2 SERVICE HINTS .......................................................................................................................................................................3 ALIGNMENT PROCEDURE AND OPTION SETTINGS............................................................................................................4 WAVEFORM PATTERN TABLE ...............................................................................................................................................5 BLOCK DIAGRAMS ..................................................................................................................................................................6 PARTS LOCATION ...................................................................................................................................................................7 REPLACEMENT PARTS LIST ..................................................................................................................................................8 SCHEMATIC DIAGRAMS .......................................................................................................................................................16 CONDUCTOR VIEWS.............................................................................................................................................................18

SAFETY PRECAUTIONSGENERAL GUIDE LINES1. 2. It is advisable to insert an isolation transformer in the a.c. supply before servicing a hot chassis. When servicing, observe the original lead dress in the high voltage circuits. If a short circuit is found, replace all parts that have been overheated or damaged by the short circuit. After servicing, see that all the protective devices such as insulation barriers, insulation papers, shields and isolation R-C combinations are correctly installed. When the receiver is not being used for a long period of time, unplug the power cord from the a.c. outlet. Potentials as high as 27.5kV are present when this receiver is in operation. Operation of the receiver without the rear cover involves the danger of a shock hazard from the receiver power supply. Servicing should not be attempted by anyone who is not familiar with the precautions necessary when working on high voltage equipment. Always discharge the anode of the tube. After servicing make the following leakage current checks to prevent the customer from being exposed to shock hazard. Unplug the a.c. cord and connect a jumper between the two prongs of the plug. Turn on the receivers power switch. Measure the resistance value with an ohmmeter, between the jumpered a.c. plug and each exposed metallic cabinet part on the receiver, such as screw heads, aerials, connectors, control shafts etc. When the exposed metallic part has a return path to the chassis, the reading should be between 4M ohm and 20M ohm. When the exposed metal does not have a return path to the chassis, the reading must be infinite. Plug the a.c. cord directly into the a.c. outlet. Do not use an isolation transformer for this check. Connect a 2k 10W resistor in series with an exposed metallic part on the receiver and an earth, such as a water pipe. Use an a.c. voltmeter with high impedance to measure the potential across the resistor. Check each exposed metallic part and check the voltage at each point. Reverse the a.c. plug at the outlet and repeat each of the above measurements. The potential at any point should not exceed 1.4V rms. In case a measurement is outside the limits specified, there is a possibility of a shock hazard, and the receiver should be repaired and rechecked before it is returned to the customer.

X-RADIATION WARNING1. 2. The potential sources of X-Radiation in TV sets are the high voltage section and the picture tube. When using a picture tube test jig for service, ensure that the jig is capable of handling 27.5kV without causing X-Radiation.

3.

4. 5.

HOT CHECK CIRCUITa.c. VOLTMETER

6.

2k 10 Watts TO INSTRUMENTS EXPOSED METALLIC PARTS

WATER PIPE (EARTH)

LEAKAGE CURRENT COLD CHECK1. 2. 3.

Fig. 1.

NOTE: It is important to use an accurate periodically calibrated high voltage meter. 1. Set the brightness to minimum. 2. Measure the high voltage. The meter should indicate 26.5kV 1kV. If the meter indication is out of tolerance, immediate service and correction is required to prevent the possibility of premature component failure. 3. To prevent any X-Radiation possibility, it is essential to use the specified tube.

LEAKAGE CURRENT HOT CHECK1. 2.

3. 4. 5. 6.

2

SERVICE HINTSHow to remove the rear cover1. Remove the 10 screws as shown in Fig.2.

SCREWS

SCREWS

Fig.2.

LOCATION OF CONTROLS

Y-Board

E-Board

Focus Screen Fig.3.

3

ALIGNMENT PROCEDURE AND OPTION SETTINGEntering SERVICE mode Service mode is entered by selecting the mute remote key and local down simultaneously with the sharpness DAC set to Minimum and programme position 99 selected. Service mode 2 is selected by pressing the Recall remote key while in service mode 1. Service mode navigation - Up /Down remote keys :cycle through the service items available. - -/+ remote keys :Decrement/Increment the values within range. - TV/AV :Store the current data. - 0 7 digit keys :Toggle bits 0-7 in option byte (service mode 2). Order Item Range

1

Cut off (VG2)

LED ON , LED OFF

2 3 4 5 6 7 8 9 10 11 12 13

Vertical slope Vertical Shift Vertical amplitude Horizontal shift Red Cut Green Cut Red Drive Green Drive Blue Drive AGC Sub-Colour Sub-Brightness

0-63 0-63 0-63 0-63 0-63 0-63 0-63 0-63 0-63 0-63 0-63 0-63

Sub-Colour:

Set sub-colour to 16.

Sub-Brightness: Set sub-colour to 33. G2 alignment: Before entering into service mode, recall the nominal picture setting :remote key N. From this setting, increase brightness by 11 steps and reduce sharpness to minimum. Tune a colour bar signal on Prg 99 and enter into SVC mode. In SVC mode , select G2 item and press or + remote key to control software disable vertical deflection. The user must then adjust G2 voltage on FBT, to find the point where LED is ON. Press or + remote key to return to normal SVC mode. - Select a dark picture and adjust Red Cut and Green Cut to the desired colour temperature. - Select a bright picture, set Blue Drive to 32 and adjust Red Drive, and Green Drive to the desired colour temperature.

White balance:

4

CIRCUIT BLOCK DIAGRAM

8

PARTS LOCATION

NOTE: The numbers on the exploded view below refer to the mechanical section of the Replacement Parts List.

8 &9 2 15

12

7

3 6 4

5

16 10

11

14 13 1

7

REPLACEMENT PARTS LISTImportant Safety NoticeComponents Identified by mark have special characteristics important for safety. * When replacing any of these components, use only manufacturers specified parts. In case of ordering these spare parts, please always add the complete Model-Type number to your order.

Cct Ref

Parts Number

Description

Cct Ref D811 D820 D821 D822 D824

Parts Number DTZX5V6B DBYW76 DBYW36 DTZX9V1B 1N4148 1N4148 1N4148 1N4148 DBAV21 DBAV21 DBAV21 DTZX12C DTZX5V6B DTZX5V6B DTZX5V6B DTZX5V6B DTZX5V6B DTZX5V6B DTZX5V6B TX0202DA DT122B8010

Description DIODE DIODE DIODE DIODE DIODE DIODE DIODE DIODE DIODE DIODE DIODE DIODE DIODE DIODE DIODE DIODE DIODE DIODE DIODE THYRISTOR DIODE

COMMON PARTSEXPLODED VIEW1 2 3 4 5 6 4858314010 4859902910 485Y-14B4C 50H0000211 A34EAC01X06 DC-1450 SPEAKER POWER CORD Y P.C.B. F.B.T. C.R.T DEGAUSS COIL

D825 D840 D841 D904 D905 D906 DA02 DA05

MISCELLANEOUS COMPONENTS. . . SCT1 4858191200 GPBMA1V5012 TZS7ED008 PCS633A CUSHION CARTON ROD ANTENNA CRT SOCKET

DA06 DA08 DA09 DA10 DA11 DA27 I810 R801

I.C.sI101 I301 I601 I801 I804 I806 I820 I822 I823 I901 TDA9830 TDA8357J TDA7267A STRF6653 KP1010C SE110N KA7805 KA7808 LP295033 TDA6107Q AM DEMODULATOR VERTICAL AMPLIFIER MONO AMPLIFIER POWER SUPPLY SWITCHING OPTO COUPLER ERROR AMPLIFIER 5V REGULATOR 8V REGULATOR 3.3V REGULATOR RGB OUTPUT

TRANSISTORST801 50M3535A1 TRANS SMS

TRANSFORMERST401 50D10A2 TRANSFORMER

COILSL101 L301 L350 L401 L500 L501 L502 L510