Panasonic TC-21S1M Colour Television Owner’s Manual

ORDER NO. SM-—95004
Service Manual
Colour Television
TC—21S1M
Z5 — Chassis

TC-21S1M Colour Television

Specifications

Power Source:| 220V — 240V AC, 50Hz| High Voltage:| 27.5kV+0.7kV / —1.0kV (zero beam current)
---|---|---|---
Power Consumption:| 39W| Picture Tube:| A51EAL55X13
51cm V 90° measured diagonally
Video / Audio Terminals:|
AV1 IN| Video
Audio| (21 pin )
(21 pin )| 1 Vp—p
500mV rms| 75Ω
10kΩ| Accessories supplied:| 1 x BNC to 21 pin Euro connector cable
AV1 OUT| Video
Audio| (21 pin )
(21 pin )| 1Vp—p
500mV rms| 75Ω
1IC2| Dimensions:|
Height:
Width:
Depth:| 477mm
518mm
478mm
RCA IN| Video
Audio| | 1Vp—p
500mV rms| 75Ω
1k52
Net Weight:| 21Kg

IMPORTANT

This receiver uses a HOT chassis, after service please ensure that the chassis is returned to its correct position.
Particular care being taken to the position of the customer controls.
Failure to do so could endanger customer safety.

Panasonic (U.K.) Ltd.
WILLOUGHBY ROAD,
BRACKNELL, BERKS,
RG12 4FP

Safety Precautions

General Guide Lines

1. It is advisable to insert an isolation transformer in the AC supply before servicing a hot chassis.
2. When servicing, observe the original lead dress in the high voltage circuits. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit.
3. After servicing, see that all the protective devices such as insulation barriers, insulation papers, shields and isolation R—C combinations are correctly installed.
4. When the receiver is not being used for a long period of time, unplug the power cord from the AC outlet.
5. Potentials as high as 29kV 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 notbe attempted by anyone who is not familiar with the precautions necessary when working on high voltage equipment. Always discharge the anode of the picture tube to the chassis before handling the tube.
6. After servicing make the following leakage current checks to prevent the customer from being exposed to shock hazards.

Leakage Current Cold Check

1. Unplug the AC cord and connectajumper between the two prongs of the plug.
2. Turn on the receiver’s power switch.
3. Measure the resistance value with an ohmmeter, between the jumpered AC 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 Q and 20M Q. When the exposed metal does not have a return path to the chassis the reading must be infinite.

Leakage Current Hot Check

1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.
2. Connect a 2k ohm 10W resistor in series with an exposed metallic part on the receiver and an earth such as a water pipe.
3. Use an AC voltmeter with high impedance to measure the potential across the resistor.
4. Check each exposed Metallic partand check the voltage at each point.
5. Reverse the AC plug at the outlet and repeat each of the above measurements.
6. The potential at any point should not exceed 1.4 Vrms. 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 Warning

1. The potential sources of X—Radiation in TV sets are the high voltage section and the picture tube.
2. When using apicture tube test jig for service ensure that the jig is capable of handling 29kV without causing X— Radiation.

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: — 27.5kV +0.7kV / —1.0kV
   if the meterindicationis out of tolerance, immediate service and correction is required to prevent the possibility of premature component failure.

3. To prevent an X— Radiation possibility, it is essential to use the specified tube.

SHUT DOWN CIRCUIT TEST

This test must be made as a final check before the set is returned to the customer.

1. Receive the Phillips pattern.
2. Check that the shut—down circuit functions when —60V is applied to TPE7, but does not function when —40V is applied.

Location Of Controls

How to move the chassis into the Service position

1. Hold and lift the rear of the E— PCB chassis and gently pull the chassis toward you.

2. Release the respective wiring clips and rotate the chassis clockwise.
   a). Place the lower edge of the chassis against the ‘L’ shaped stopper located in the chassis rail whilst sliding the upper edge of the board into the chassis holding rib Fig. 3.
   OR
   b) Slidethe lower edge ofthe chassis into the power cable holder case whilst sliding the upper edge ofthe board into the chassis holding rib Fig. 4.

3. After servicing ensure all wiring is returned to its original position before returning the receiver to the customer.

ADJUSTMENTS

B VOLTAGE
1. Operate the TV set.
2. Set controls:
Bright (R318) ………. minimum
Sub Bright R306 ……. minimum
Contrast…………… minimum
Beam Current………. Zero| 1. Confirm the indicated test points for the specified voitage.

HIGH VOLTAGE
1. Receive a crosshatch pattern.
2. Set Contrast, Bright and Sub—Bright controls to their minimum positions
(Zero beam current).| 1. Connect a high voltage meter (Electrostatic type) to an anode of the picture tube.
2. Confirm that the high voltage is within a range of 27.5kV +0.7kV / —1.0kV
SUB CONTRAST
1. Receive a Philips pattern. (Input level 75dB).
2. Connect an oscilloscope to TPE15.
3. Set controls to:
Brightness minimum
Contrast maximum
Colour minimum
Pix minimum| 1. Adjust Sub brightness R306 to set the black level to 0.2V.
2. Adjust the Sub contrast (R316) to set the drive voltage to
2.0V+/— 0.1V—p|
---|---|---
SUB COLOUR
1. Receive a PAL colour bar pattern.
2. Set controls to:
Brightness minimum
Contrast maximum
Colour centre
3. Connect an oscilloscope to TPE15.| 1. Adjust the sub colour (R607) for 1.2Vp—p +/— 0.1V at TPE15 as shown in Fig.5.|

CONDUCTOR VIEWS

E Board.

Y BOARD TNP8EY008

Y Board.

WAVEFORM PATTERN TABLE

VIDEO SIGNAL

BLOCK DIAGRAM

AUDIO SIGNAL
BLOCK DIAGRAM

POWER SUPPLY
BLOCK DIAGRAM

CONTROL SIGNAL
BLOCK DIAGRAM

SCHEMATIC DIAGRAM FOR MODELS

TC-21S1M
(Z-5 CHASSIS)

IMPORTANT SAFETY NOTICE
Components identified by mark have special characteristics important for safety. When replacing any of these components, use only manufacturer’s spectied parts.

Notes:

1. RESISTOR
   All resistors are carbon ¼W reaistor, unless marked.
   Unit of resistance is OHM (M2) (K=1,000, M=1,000,000).

2. CAPACITOR
   Ail capacitors are ceramic 50V capacitors, unless marked as follows:
   Unit of capacitance is μF, unless otherwise stated.

3. COIL
   Unit of Inductance is μH, unless otherwise stated.

4. TEST POINT

5. EARTH SYMBOL

6. VOLTAGE MEASUREMENT
   Voltage Is measured by a DC voltmeter.Measurement conditions are as follows:Power source| AC 220V – 240V, 50Hz
   ---|---
   Receiving Signal| Colour Bar signal (RF)
   All customer controls| Maximum position

7. : Indicates the Video signal path
   : Indicates the Audio signal path
   : Indicates the Vertical/Horizontal signal path

8. This schematic diagram Is the latest at the time of printing and is subject to change without notice.

Remarks

1. The Power Circuit contains a circuit area which uses a separate power supply to isolate the earth connection. The circuit is defined by HOT and COLD Indications in the schematic diagram. All circuits, except the Power Circuit, are COLD.

Precautions
a. Do not touch the hot part, or the hot and cold parts at the same time, as you are Hable to a shock hazard.
b. Do not short-circuit the hot and cold circuits as electrical components may be damaged.
c. Do not connect an Instrumont, such as an oscilloscope, to the hot and cold circuits simultaneously, as this may cause fuse failure.
Connect the earth of the instruments to the earth connection of the circuit being measured.
d. Make sure to disconnect the power plug before removing the chassis.

The following resistors are fusible safety components and are rated at the following values :

V— BOARD TNP8EY008 TC.21S1M

V — BOARD TNP8EV002 TC—21S1M

E — BOARD TNP8EE004 TC-21S1M

PARTS LOCATION

TC-21S1M

REPLACEMENT PARTS LIST

Important Safety Notice
Components identified by the 4 mark have special characteristics important for safety.
When replacing any of these components, use only the manufacturer’s specified parts.

CAPACITORS
C022| ECEAIHGE330| ELECT| 50V| 33μF
C208| ECEAIHU2R2| ELECT| 50V| 2.2μF
C209| ECEAICU100| ELECT| 16V| 10μF
C214| ECEAIHU2R2| ELECT| 50V| 2.2μF
C215| ECUV1H2232ZFX| S.M. CAP| 50V| 22μF
C216| ECEAICU220| ELECT| 16V| 22μF
C241| ECEAICN470| ELECT| 16V| 47μF
C251| ECEAICU471| ELECT| 16V| 470μF
C252| ECUVIH153ZFX| S.M. CAP| 50V| 15nF
C252| ECUV1H183KBX| S.M. CAP| 50V| 18nF
C253| ECEAIHFS2R2| S.M. CAP| 50V| 2.2μF
C254| ECEAIEU101| ELECT| 25V| 100μF
C255| ECEA1CGE330| ELECT| 16V| 33μF
C256| 2.22237E+11| FILM| 160V| 330nF
C257| 2.22237E+11| FILM| 160V| 150nF
C258| ECEAIEGE222| ELECT| 25V| 2200μF
C259| ECEAIEU102| ELECT| 25V| 1000μF
C261| ECUVIH104ZFW| S.M. CAP| 50V| 100nF
C263| ECEAIHU2R2| ELECT| 50V| 2.2μF
C302| ECUV1H104ZFW| S.M. CAP| 50V| 100nF
C303| ECUV1H223ZFX| S.M. CAP| 50V| 22nF
C304| ECEA1AU33| ELECT| 10V| 330μF
C305| ECQM1H104)| FILM| 50V| 100nF
C308| ECUV1H473ZFX| S.M. CAP| 50V| 47nF
C309| ECEAICU100| ELECT| 16V| 10μF
C311| ECUV1H103ZFX| S.M. CAP| 50V| 10nF
C312| ECEAIAU471| ELECT| 10V| 470μF
C313| ECUVIH103ZFX| S.M. CAP| 50V| 10nF
C351| ECUV1H561KBX| S.M. CAP| 50V| 560pF
C352| ECUV1H681KBX| S.M. CAP| 50V| 680pF
C353| ECUV1HS561KBX| S.M. CAP| 50V| 560pF
C355| ECKC3D152| CERAMIC| 2KV| 1.5nF
C357| ECKC2H152J| CERAMIC| 500V| 1.5nF
C358| ECEAIHU220| ELECT| 50V| 22μF
C360| ECEAICUI01| ELECT| 16V| 100μF
C362| ECUV1H102ZFX| S.M. CAP| 50V| 1μF
C368| ECEA2EU010| ELECT| 250V| 1μF
C369| ECEA1HUR47| ELECT| 50V| 0.47μF
C401| ECQM1H104J| FILM| 50V| 100nF
C402| ECUVIH471UCX| S.M. CAP| 50V| 470pF
C450| ECUV1H103KBX| S.M. CAP| 50V| 10nF
C451| ECUV1H103KBX| S.M. CAP| 50V| 10nF
C451| ECUV1H473ZFX| S.M. CAP| 50V| 47nF
C452| ECKC2H471J| CERAMIC| 500V| 470pF
C454| ECKC2H471J| CERAMIC| 500V| 470pF
C454| ECQB1H102J| FILM| 50V| 1nF
C455| ECEA1HU101| ELECT| 50V| 100pF
C457| ECEA1EU222| ELECT| 25V| 2200μF
C458| ECEA1CN470| ELECT| 16V| 47μF
C458| ECQM1H104J| FILM| 50V| 100nF
C459| ECEA1EU330| ELECT| 25V| 33yF
C459| ECEA1EU470| ELECT| 25V| 47μF
C461| ECEA1VGE102| ELECT| 35V| 1000LF
C501| ECUV1H472KBX| S.M. CAP| 50V| 4.7nF
C502| ECEA1HU010| ELECT| 50V| 1pF
C503| ECUV1H222KBX| S.M. CAP| 50V| 2.2nF
C504| ECUV1H821JCX| S.M. CAP| 50V| 820pF
C505| ECQM1273KZW| FILM| 100V| 27nF
C506| ECEA1JU100| ELECT| 63V| 10pF
C507| ECEAIHFS2R2| S.M. CAP| 50V| 2.2μF
C508| ECEA1CU100| ELECT| 16V| 10pF
C509| ECEA1AGE471| ELECT| 10V| 470μF
C511| ECEA1HGE100| ELECT| 50V| 10pnF
C512| ECKC2H103J| CERAMIC| 50V| 10nF
C512.| ECKC2H222J| CERAMIC| 500V| 2200pF
C553| ECWH12H822J| CERAMIC| 500V| 8.2nF
C554| ECQM4333JC| FILM| 400V| 33nF
C555| ECQM4333JC| FILM| 400V| 33nF
C556| ECKC3D152J| CERAMIC| 2KV| 1.5nF
C557| ECKC3D122J| CERAMIC| 2KV| 1200pF
C558| ECWF2H474J| FILM| 500V| 470nF
C559| ECEA2CGR47| ELECT| 160V| 0.47μF
C561| ECKC2H471J| CERAMIC| 500V| 470pF
C562| ECEA2EGE100| ELECT| 250V| 10μF
C563| ECKC2H471J| CERAMIC| 500V| 470pF
C564| ECEA1EU471| ELECT| 25V| 470μF
C565| ECEA2CU2R2| ELECT| 160V| 2.2μF
C565| ECEA2CU4R7| ELECT| 160V| 4.7μF
C566| ECKC2H471J| CERAMIC| 500V| 470pF
C567| ECKC2H561J| CERAMIC| 500V| 560pF
C568| ECEA1VU101| ELECT| 35V| 100μF
C569| ECEA1VU471| ELECT| 35V| 470μF
C571| ECUV1H122UX| S.M. CAP| 50V| 1.2nF
C571| ECUV1H223KBX| S.M. CAP| 50V| 22nF
C572| ECKC2H152J| CERAMIC| 500V| 1.5nF
C572| ECQE1223JF3| FILM| 100V| 22nF
C601| ECUV1H222KBX| S.M. CAP| 50V| 2.2nF
C602| ECUV1H150JRX| S.M. CAP| 50V| 15pF
C602| ECUV1H331JCX| S.M. CAP| 50V| 330pF
C604| ECUV1H392KBX| S.M. CAP| 50V| 3.9nF
C605| ECQB1H104J| FILM| 50V| 100nF
C606| ECUV1H104ZFW| S.M. CAP| 50V| 100nF
C607| ECUV1H104ZFW| S.M. CAP| 50V| 100nF

FUSES

F801| 2153.15H| FUSE
F8,011| EYF52BC| FUSE HOLDER
F8,012| EYF52BC| FUSE HOLDER
INTEGRATED CIRCUITS

IC012| UPC574J| REGULATOR
IC251| AN5265| AUDIO OUTPUT I.C.
IC451| TDA3654| VERTICAL OUT 1.0.
IC601| TDA8362N4| VIDEO PROCESSOR
IC602| TDA4665-V3| DELAY UNE
IC603| TDA8395PN2| SECAM DECODER
IC801| STR51424-M| POWER SUPPLY REGULATOR
1C851| L78M05MRB| 5V REGULATOR
IC852| L78M12MRB| 12V REGULATOR
IC1202| MN152811TBS| MICRO PROCESSOR
IC1203| MN128OR| RESET
IC1205| ST24CO2CB1| EEPROM

SOCKETS/TERMINALS/LINK WIRES

COILS

CONTROLS

TRANSISTORS

RESISTORS

1518

Documents / Resources

| Panasonic TC-21S1M Colour Television [pdf] Owner's Manual
TC-21S1M Colour Television, TC-21S1M, Colour Television, Television
---|---

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