Panasonic TX-25MK1P Service Manual
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Panasonic TX-25MK1P Service Manual

Euro-4 chassis
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SPECIFICATIONS
Power Source:
220-240V a.c., 50Hz
Power Consumption:
130W
Stand-by Power
Consumption:
1,8W
Aerial Impedance:
75Ω unbalanced, Coaxial Type
Receiving System:
PAL B/G, H, D/K, PAL-525/60
SECAM B/G, D/K
M.NTSC
NTSC (AV only)
Receiving Channels:
VHF E2-E12
VHF H1-H2 (ITALY)
VHF A-H (ITALY)
VHF R1-R2
VHF R3-R5
VHF R6-R12
UHF E21-E69
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 (A2 Stereo)
33,05MHz (NICAM)
32,66MHz, 32,4MHz (Czech Stereo)
Colour
34,47MHz (PAL)
34,5MHz, 34,65MHz (SECAM)
Terminals:
AUDIO MONITOR OUT
Audio (RCAx2) 500mV rms 1kΩ
AV1 IN
Video (21 pin) 1V p-p 75Ω
Audio (21 pin) 500mV rms 10kΩ
RGB (21 pin)
AV1 OUT
Video (21 pin) 1V p-p 75Ω
Audio (21 pin) 500mV rms 1kΩ
Colour Television
EURO-4 Chassis
AV2 IN
Video (21 pin)
Audio (21 pin)
S-Video IN
(21-pin)
AV2 OUT
Video (21 pin)
Audio (21 pin)
Selectable output (21 pin)
AV3 IN
Audio (RCAx2)
Video (RCAx1)
28,2kV ±1kV
High Voltage:
Picture Tube:
A59ECF50X42
Audio Output:
2 x 15W (Music Power)
8Ω Impedance
Headphones:
8Ω Impedance
3,5 mm
Accessories
supplied :
Remote Control
2 x R6 (UM3) Batteries
Dimensions:
Height:
535mm
Width:
601mm
Depth:
440mm
Net weight:
25kg
Specifications are subject to change without notice.
Weights and dimensions shown are approximate.
NOTE:
This Service Manual should be used in conjunction with
the EURO-4 Technical guide.
ORDER No. 99-SM-002
TX-25MK1P
1V p-p 75Ω
500mV rms 10kΩ
Y: 1V p-p 75Ω
C:0,3V p-p 75Ω
1V p-p 75Ω
500mV rms 1kΩ
500mV rms 10kΩ
1V p-p 75Ω
59cm

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Summary of Contents for Panasonic TX-25MK1P

  • Page 1 ORDER No. 99-SM-002 Colour Television TX-25MK1P EURO-4 Chassis SPECIFICATIONS Power Source: 220-240V a.c., 50Hz AV2 IN Video (21 pin) 1V p-p 75Ω Audio (21 pin) 500mV rms 10kΩ Power Consumption: 130W S-Video IN Y: 1V p-p 75Ω (21-pin) C:0,3V p-p 75Ω...

  • Page 2: Table Of Contents

    CONTENTS SAFETY PRECAUTIONS................................2 SERVICE HINTS ..................................3 ADJUSTMENT PROCEDURE AND SELF-CHECK ........................4 WAVEFORM PATTERN TABLE ...............................5 ALIGNMENT SETTINGS................................6 BLOCK DIAGRAMS ..................................7 PARTS LOCATION .................................11 REPLACEMENT PARTS LIST ..............................12 SCHEMATIC DIAGRAMS ...............................20 CONDUCTOR VIEWS................................24 SAFETY PRECAUTION GENERAL GUIDE LINES It is advisable to insert an isolation transformer in the Check each exposed metallic part and check the a.c.

  • Page 3: Service Hints

    SERVICE HINTS How to remove the rear cover Remove the 9 screws as shown in Fig.2. SCREWS Fig.2. LOCATION OF CONTROLS FOCUS SCREEN E-BOARD H-BOARD Y-BOARD Fig.3.

  • Page 4: Adjustment Procedure And Self-Check

    ADJUSTMENT PROCEDURE Item / Preparation Adjustments +B SET-UP Set the +B voltage up as follows:- Adjust R811 so that B2 shows 148V±1V Receive a Greyscale signal. Confirm the following voltages. Set the controls :- ± 0,25V ± 0,25V ± 0,5V ±...

  • Page 5: Waveform Pattern Table

    WAVEFORM PATTERN TABLE Vert Drive VFLB Vert Out IC451 Pin 2 IC451 Pin 3 IC601 Pin 31 20mS 20mS 20mS H - Out H - Out H - Pulse IC601 Pin 50 IC701 Pin 5 Base Q503 64µS 64µS 64µS HFLB HFLB Video Out...

  • Page 6: Alignment Settings

    ALIGNMENT SETTINGS (The figures below are nominal and used for representative purposes only.) Set the Bass to maximum position, set the Treble to minimum position, press the down button (- / v) on the customer controls at the front of the TV and at the same time press the INDEX button on the remote control, this will place the TV into the Service Mode.

  • Page 11: Parts Location

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

  • Page 12: Replacement Parts List

    SPEAKER IC1051 RPM6937-V4 LED RECEIVER ENG27507GR TUNER IC1101 SDA5450C47 MICRO PROCESSOR EUR511200 REMOTE CONTROL IC1102 27C2001-G11 EPROM * TBM8E1929 PANASONIC BADGE IC1103 XDG2-03BP EAROM * TBM8E1952 MODEL LABEL IC1104 MN1381-R(TA) RESET TBX8E070 POWER BUTTON IC1105 MN1381-T(TA) RESET TKP8E1289 LID DOOR...
  • Page 13 Cct Ref Parts Number Description Cct Ref Parts Number Description D701 MA165TA5 DIODE Q353 TYMQ0002 TRANSISTOR D702 MTZJT-775.1C DIODE Q354 BC857B TRANSISTOR D704 MA29TA5 DIODE Q451 BC857B TRANSISTOR D705 MTZJT-775.6C DIODE Q503 2SD2398-M2 TRANSISTOR D801 RBV4-08 DIODE Q551 BU4508AXLB TRANSISTOR D803 1SR124-4AT82 DIODE...
  • Page 14 Cct Ref Parts Number Description Cct Ref Parts Number Description L851 EXCELSA35T COIL JA37 ERJ6GEY0R00 S.M.CARB 0.1W L852 ELEIE470KA COIL JA38 ERJ6GEY0R00 S.M.CARB 0.1W L853 EXCELSA35T COIL JA39 ERJ6GEY0R00 S.M.CARB 0.1W L854 EXCELSA35T COIL JA40 ERJ6GEY0R00 S.M.CARB 0.1W L855 EXCELSA35T COIL JA43 ERJ8GEY0R00...
  • Page 15 Cct Ref Parts Number Description Cct Ref Parts Number Description R262 ERJ6GEYJ103 S.M.CARB 0.1W R554 ERG1SJ101 METAL R263 ERJ6GEYJ473 S.M.CARB 0.1W R555 ERQ12HKR33 METAL 0.5W R264 ERJ6GEYJ103 S.M.CARB 0.1W R558 ERDS1TJ124 CARBON 0.5W 120K R265 ERD25TJ2R2 CARBON 0.25W R559 ERQ12HKR33 METAL 0.5W R266...
  • Page 16 Cct Ref Parts Number Description Cct Ref Parts Number Description R860 ERQ1CJP2R2 FUSIBLE 1W 10% R1126 ERJ6GEYJ101 S.M.CARB 0.1W R861 ERD25TJ221 CARBON 0.25W R1127 ERJ6GEYJ101 S.M.CARB 0.1W R862 ERD25TJ272 CARBON 0.25W R1128 ERJ6GEYJ682 S.M.CARB 0.1W R863 ERDS1TJ560 CARBON 0.5W R1129 ERJ6GEYJ682 S.M.CARB 0.1W...
  • Page 17 Cct Ref Parts Number Description Cct Ref Parts Number Description 10µF R2311 ERJ6GEYJ102 S.M.CARB 0.1W C108 ECA1CM100GB ELECT R2312 ERJ6GEYJ103 S.M.CARB 0.1W C109 ECUV1H102JCX S.M. CAP 10nF C110 ECJ2VF1H103Z ELECT 350V R3001 ERJ6GEYJ101 S.M.CARB 0.1W 0.33µF R3002 ERJ6GEYJ471 S.M.CARB 0.1W C111 ECA1HMR33GB ELECT...
  • Page 18 Cct Ref Parts Number Description Cct Ref Parts Number Description 680nF 1.5nF C560 ECA2GHG2R2B ELECT 400V C819 ECQB1H152K FILM 1000µF 470pF C561 ECA1EHG102B ELECT C850 ECKC3D471JB CERAMIC 100pF 220µF C562 ECKC2H101J CERAMIC 500V C851 ECA2CM221E ELECT 160V 20µF 100µF C563 ECA2EHG220B ELECT 250V...
  • Page 19 Cct Ref Parts Number Description Cct Ref Parts Number Description 270pF C2105 ECUV1H102JCX S.M. CAP C3033 ECUV1H271JCX S.M. CAP 270pF C2106 ECUV1H102JCX S.M. CAP C3034 ECUV1H271JCX S.M. CAP 270pF C2107 ECUV1H102JCX S.M. CAP C3035 ECUV1H271JCX S.M. CAP 100nF C2108 ECUV1H102JCX S.M.

  • Page 20: Schematic Diagrams

    SCHEMATIC DIAGRAMS FOR MODEL TX-25MK1P (EURO-4 CHASSIS) IMPORTANT SAFETY NOTICE Components identified by mark have special characteristics important for safety. When replacing any of these components, use only manufacturers' specified parts. NOTE RESISTOR All resistors are carbon ¼W resistor, unless marked otherwise.

  • Page 24: Conductor Views

    CONDUCTOR VIEWS E-BOARD TNP8EE009 TRAN’S DIODES D558 Q3601 L8 D3102 B7 D557 Q3007 M9 D3101 B7 D556 Q3006 N10 D2304 G7 D555 Q3001 N8 D2303 G7 D554 Q2304 I7 D2161 G9 D553 Q2303 M6 D2105 G10 D552 Q2302 I7 D2104 F9 D551 Q2301 L6 D2103 G10...
  • Page 25 Y - BOARD TNP8EY012 TRANSISTORS Q909 Q908 Q907 Q906 Q905 Q354 Q353 Q352 Q351 DIODES D906 D905 D904 D902 D901 D364 D363 D362 D361 D360 D359 D358 D357 D356 D355 D354 TEST POINTS TPY6 B8 TPY5 D5 TPY4 E5 TPY3 F6 TPY2 E7 TPY1 G6 IC’S...
  • Page 26 H - BOARD TNP8EH002 TRANSISTORS Q3401 Q3402 I.C.’S IC3401 C2...

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