Panasonic TX-21AD2 Service Manual
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Panasonic TX-21AD2 Service Manual

Panasonic TX-21AD2 Service Manual

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Service Manual
Service Manual
Specifications
Power Source :
Power Consumption :
Aerial Impedance :
Receiving System :
Receiving Channels :
Intermediate Frequency :
Video
Sound
Colour
Video / Audio
Terminals :
AUDIO MONITOR OUT
AV1 IN
AV1 OUT
AV2 IN
Panasonic
220-240V AC 50Hz
80W
75W unbalanced, Coaxial Type
PAL I, PAL 60,
UHF E21 - E69
39.5 MHz
33.5 MHz
35.07 MHz
Audio(RCA x 2)
500mV rms,1k W
Video (21 pin )
1V p-p 75W
Audio (21 pin )
500mV rms,10k W
RGB (21 pin )
Video (21 pin )
1V p-p 75W
Audio (21 pin )
500mV rms, 1k W
Video (21 pin )
1V p-p 75W
Audio (21 pin )
500mV rms,10 k W
S-Video IN
Y : 1V p-p 75W
(21 pin )
C : 0.3V p-p 75W

Colour Television

TX-21AD2
EURO-2 Chassis
AV2 OUT
AV3 IN
High Voltage :
Picture Tube :
Audio Output :
Internal Speaker
Headphones
Accessories supplied :
Dimensions :
Net Weight
Specifications are subject to change without notice.
Weight and dimensions shown are approximate.
This service manual should be used in conjunction
NOTE :
with the EURO 2 technical guide.
SM - 96004
Video (21 pin ) 1V p-p 75W
Audio (21 pin ) 500mV rms, 1kW
Audio (RCA x 2)500 mV rms,10k W
Video (RCA x 1)1V p-p 75 W
27kV _1kV at zero beam current
51 cmV measured diagonally.
2 x 20W (Music Power)
8W Impedance
8 W Impedance
Remote Control
UM3 Battery
T.V. Stand
Height : 465mm
Width :
558mm
Depth :
495mm
23kg
Panasonic CS (UK)
WILLOUGHBY ROAD,
BRACKNELL
BERKS,
RG12 8FT.

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  • Page 1: Colour Television

    S-Video IN Y : 1V p-p 75W This service manual should be used in conjunction NOTE : (21 pin ) C : 0.3V p-p 75W with the EURO 2 technical guide. Panasonic CS (UK) Panasonic WILLOUGHBY ROAD, BRACKNELL BERKS, RG12 8FT.

  • Page 2: Safety Precautions

    Contents Safety Precautions Location of Controls Chassis Service Position Service Mode Self Check Adjustment Procedure Alignment Settings Waveform Pattern Table Block Diagrams P.C.B. Views Schematic Diagrams Parts Location Replacement Parts List Safety Precautions General Guide Lines It is advisable to insert an isolation transformer in the AC su p ply Check each exposed Metallic part and check the voltage at each before servicing a hot chassis.

  • Page 3: Location Of Controls

    Location Of Controls FOCUS SCREEN Fig.2 Service Hints How to remove the rear cover Remove the 5 fixing screws (A) as shown in Fig.3/Fig.4. SCREW Fig.4 SCREWS (A) Fig.3.
  • Page 4 How to move the chassis into the Service position NOTE: To place the chassis into the advised service position the T.V. must be on the T.V. stand provided with the set. To place the chassis into service position hold and lift the rear of the E-PCB chassis and gently pull the chassis toward you as shown in Fig.5. B-PCB service position Release the respective wiring clips and rotate the chassis horizontally through 90_ anti-clockwise, then lift the front of the chassis as shown in...

  • Page 5: Service Mode

    TX-21AD2 Service Mode The remote control is used for entering and storing adjustments, with the exception of cut-off adjustments which must always be done prior to service adjustment. Perform adjustments in accordance with screen display. The display on the screen also specifies the CCU variants as well as the approx.

  • Page 6: Self Check

    TX-21AD2 SELF CHECK Self check used automatically check lines Hexadecimal code set. To enter the Self Check mode press Function down button, on the Preset Panel, at the same time pressing the Status button, on the Remote Control, and the screen will show:-...
  • Page 7 TX-21AD2 Alignment Settings (The figures used below are nominal and used for representative purposes only) Alignment Function TX-21AD2 Settings / Special features Vertical amplitude V-AMP Optimum setting Vertical symmetry V-SYM Optimum setting Vertical linearity V-LIN Optimum setting -020 Vert. D.C.
  • Page 8 PIN 6 E8 PIN 5 E8 PIN 3 E8 PIN 42 I601 50u sec/div PIN 4 E8 PIN 44 PIN 7 PIN 18 2u sec/div 5u sec/div (Chroma) PIN 6 PIN 34 PIN 3 PIN 6 IC801 5m sec/div 5m sec/div 5u sec/div 5m sec/div COLLECTOR...
  • Page 9 X103 TUNER FILTER IC102 VIDEO Q103 BUFFER Q3006 TUNER BUFFER VIDEO IN Q3001 IC3001 BUFFER Q3005 BUFFER 10 8 Q3004 BUFFER IC3501 MEMORY IC601 VIDEO IC3502 TELETEX H OUT Q302 Q307 Q301 Q351 BUFFER OUTPUT AMP IC351 Q304 Q308 Q303 Q352 RGB AMPS BUFFER...
  • Page 10 MUTE SIGNAL LEFT AUDIO IC102 X103 Q102 Q101 RIGHT AUDIO TUNER SIF/VIF/DEMODULATOR FILTER BUFFER IF SIGNAL Q202 Q201 BUFFER Q2102 AV1 IN BUFFER I251 AV1 OUT AUDIO OUTPUT IC2101 Q2101 AUDIO BUFFER PROCESSOR AV2 IN AV2 OUT AV3 IN AV2 OUT Q2310 Q2309 Q2306...
  • Page 11 IC701 HORIZ OUTPUT IC851 IC102 IC2301 IC103 IF PROCESSOR 8V REG 12V REG IC1202 5VSB EEPROM IC451 MEMORY VERTICAL IC601 VIDEO TUNER I466 AUDIO OUTPUT IC2101 SOUND PROCESSOR 200V IC3001 SWITCHING D554 Q551 Q503 LINE DRIVER OUTPUT IC1203 IC1201 EAROM MICROPROCESSOR PROGRAMME CONTROL...
  • Page 12 TP’S TRANS TPY1 Q351 TPY2 Q352 TPY3 Q353 TPY4 TPY5 IC’S TPY6 IC351 Y BOARD TNP117069...
  • Page 14 SCHEMATIC DIAGRAM FOR MODELS TX-21AD2 (EURO-2S CHASSIS) IMPORTANT SAFETY NOTICE Components identified by mark have special characteristics important for safety. When replacing any of these components, use only manufacturer's specified parts. Notes RESISTOR All resistors are carbon ¼W resistor, unless marked.
  • Page 19 The numbers on the exploded view below refer to the miscellaneous section of the Replacement Parts List.

  • Page 20: Replacement Parts

    CHASSIS FRAME C201 ECUV1H070DCX S.M. CAP EAG1218A2 SPEAKER C202 ECUV1H070DCX S.M. CAP TKP8E1139 SPEAKER C203 ECUV1H470JX S.M. CAP 47pF TBM153022 PANASONIC BADGE C204 ECUV1H560JCX S.M. CAP 56pF TBX8E030 POWER BUTTON C205 ECUV1H100DCX S.M. CAP 10pF TKP8E1138AD2 DOOR C207 ECUV1H220JCX S.M. CAP...
  • Page 21 C460 ECQV1H105JZ FILM C818 ECKC2H472J CERAMIC 500V 4.7nF C462 ECEA1VGE332 ELECT 35V 3300mF C820 ECOS2GA151CB ELECT 150mF C463 ECQB1H222J FILM 2200pF C821 ECKCNS332J CERAMIC 1.2KV 3.3nF C501 ECEA1AU330 ELECT 33mF C851 ECKC2H681J CERAMIC 500V 680pF C506 ECUV1H103ZFX S.M. CAP 10nF C852 ECEA1HU102 ELECT...
  • Page 22 C2313 ECUV1H103KBX S.M. CAP 10nF D253 MA700TA5 DIODE C2314 ECUV1H104ZFX S.M. CAP 100nF D254 MA700TA5 DIODE C2315 ECUV1H103KBX S.M. CAP 10nF D310 MA165TA5 DIODE C2316 ECUV1H103ZFX S.M. CAP 10nF D311 MA29TA5 DIODE C2317 ECA1CM470GB ELECT 47mF D312 MA29TA5 DIODE C2318 ECUV1H222KBX S.M.
  • Page 23 D3018 MA165TA5 DIODE JA23 ERJ6GEY0R00 WIRE LINK D3019 MA165TA5 DIODE JA24 ERJ6GEY0R00 WIRE LINK D3501 MA165TA5 DIODE JA25 ERJ6GEY0R00 WIRE LINK JA25 ERJ8GEY0R00 WIRE LINK FUSES JA26 ERJ6GEY0R00 WIRE LINK JA27 ERJ6GEY0R00 WIRE LINK F801 19181-3.15 FUSE JA28 ERJ6GEY0R00 WIRE LINK F851 TR5-T1250...
  • Page 24 L1201 TLT047K991R COIL Q2310 BC860B TRANSISTOR L1202 TLT047K991R COIL Q3001 2SC1318-S TRANSISTOR L1203 TLT047K991R COIL Q3004 BC847B TRANSISTOR L1204 EXCELDR35V COIL Q3005 BC847B TRANSISTOR L2101 TLT100K991R COIL Q3006 2SC1318-S TRANSISTOR L2102 TLT3R9K991R COIL Q3011 BC857B TRANSISTOR L2103 EXCELSA35T COIL Q3012 2SD1328STX TRANSISTOR L2104...
  • Page 25 R266 ERD25TJ2R2 CARBON 0.25W 5% 2R2W R501 ERJ6GEYJ331 S.M.CARB 0.1W 5% 330W R267 ERF7ZK4R7 WOUND 10% 4R7W R502 ERJ6GEYJ560 S.M.CARB 0.1W R268 ERJ6GEYJ103 S.M.CARB 0.1W 5% 10KW R503 ERJ6GEYJ273 S.M.CARB 0.1W 5% 27KW R269 ERJ6GEYJ273 S.M.CARB 0.1W 5% 27KW R504 ERJ6GEYJ101 S.M.CARB 0.1W...
  • Page 26 R820 ERD75TAJ825 CARBON 0.75W 5% 8M2W R2302 ERJ6GEYJ222 S.M.CARB 0.1W 5% 2K2W R852 ERJ6GEYJ271 S.M.CARB 0.1W 5% 270W R2303 ERJ6GEYJ471 S.M.CARB 0.1W 5% 470W R853 ERJ6GEYJ101 S.M.CARB 0.1W 5% 100W R2304 ERJ6GEYJ471 S.M.CARB 0.1W 5% 470W R854 ERDS1TJ474 CARBON 0.5W 5% 470KW R2313 ERJ6GEYJ101...
  • Page 27 R3053 ERJ6GEYJ101 S.M.CARB 0.1W 5% 100W R3054 ERJ6GEYJ101 S.M.CARB 0.1W 5% 100W R3055 ERJ6GEYJ101 S.M.CARB 0.1W 5% 100W R3056 ERJ6GEYJ101 S.M.CARB 0.1W 5% 100W R3057 ERJ6GEYJ101 S.M.CARB 0.1W 5% 100W R3058 ERJ6GEYJ153 S.M.CARB 0.1W 5% 15KW R3059 ERJ6GEYJ153 S.M.CARB 0.1W 5% 15KW R3060 ERJ6GEYJ470...

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