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CONTENTS

SAFETY PRECAUTIONS..........................................................................................................................................................2
SERVICE HINTS.......................................................................................................................................................................3
ADJUSTMENT PROCEDURE AND FACTORY SETTINGS .....................................................................................................4
WAVEFORM PATTERN TABLE ...............................................................................................................................................5
ALIGNMENT SETTINGS...........................................................................................................................................................6
BLOCK DIAGRAMS ..................................................................................................................................................................7
PARTS LOCATION .................................................................................................................................................................10
REPLACEMENT PARTS LIST ................................................................................................................................................11
SCHEMATIC DIAGRAMS .......................................................................................................................................................20
CONDUCTOR VIEWS.............................................................................................................................................................27

SAFETY PRECAUTIONS

GENERAL GUIDE LINES

1.  It is advisable to insert an isolation transformer in the

a.c. 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 that 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 a.c. outlet.

5.  Potentials as high as 27,7kV {23,7kV} 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.

6.  After servicing make the following leakage current

checks to prevent the customer from being exposed

to shock hazard.

LEAKAGE CURRENT COLD CHECK

1.  Unplug the a.c. cord and connect a jumper 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 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.

LEAKAGE CURRENT HOT CHECK

1.  Plug the a.c. cord directly into the a.c. outlet. Do not

use an isolation transformer for this check.

2.  Connect a 2k  10W resistor in series with an

exposed metallic part on the receiver and an earth,

such as a water pipe.

3.  Use an a.c. voltmeter with high impedance to

measure the potential across the resistor.

4.  Check each exposed metallic part and check the

voltage at each point.

5.  Reverse the a.c. plug at the outlet and repeat each of

the above measurements.

6.  The potential at any point should not exceed

1,4Vrms. 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 a picture tube test jig for service, ensure

that the jig is capable of handling 27,7kV {23,7kV}

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

 26,7kV  ± 1kV   {22,7kV ± 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.

HOT CHECK CIRCUIT

a.c. VOLTMETER

WATER PIPE

(

EARTH)

TO INSTRUMENT'S EXPOSED

METALLIC PARTS

Fig. 1.

2k  10 Watts

2

Summary of Contents for TC-14JR1P

Page 1: ...o 33 4 MHz 32 4 MHz Colour 34 47 MHz PAL 34 5 MHz SECAM 34 65 MHz SECAM Terminals AV1 IN Video 21 pin 1V p p 75 Audio 21 pin 500mVrms 10k RGB 21 pin AV1 OUT Video 21 pin 1V p p 75 Audio 21 pin 500mV rms 1k RCA IN Video 1V p p 75 RCA IN Audio 500mV rms 10k High Voltage 26 7kV 1kV 22 7kV 1kV Picture Tube A51EAL155X13 51cm A34EAC01X13 34cm Audio Output 6W M P O 3W R M S 8 Impedance Headphones 8 Imped...

Page 2: ...t 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 LEAKAGE CURRENT HOT CHECK 1 Plug the a c cord directly into the a c outlet Do not use an isolation transformer for t...

Page 3: ...SERVICE HINTS How to remove the rear cover 1 Remove the 5 screws as shown in Fig 2 LOCATION OF CONTROLS 3 Fig 2 Fig 3 Screews E Board Y Board Focus Screen ...

Page 4: ...itch off the TV set at the power button Service Aids To aid in the service of our current chassis there are a number of Service Aids which have been made available LUCI interface kit Linked Utility Computer Interface Part number TZS6EZ002 This contains interface and cables for connecting TV service connector and a PC as well as diagnostic software As new models are introduced upgrade software will...

Page 5: ...WAVEFORM PATTERN TABLE 5 CONDITIONS Contrast MAX Brightness MID Colour MID CATS OFF Sharpness MID ...

Page 6: ...the Normalization button NOTE The figures used below are nominal and used for representative purposes only Alignment Function Setting indication Note All setting values are approximate Settings Special features 1 Vertical amplitude V Amp 31 Optimum setting 2 Vertical position V Pos 22 Optimum setting 3 Horizontal centre H Ctr 07 Optimum setting 4 Red cutoff R Cut 148 Optimum setting 5 Green cutoff...

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Page 10: ...PARTS LOCATION NOTE The numbers on the exploded view below refer to the exploded view section of the Replacement Parts List 10 2 5 18 9 8 13 22 17 19 3 10 14 15 11 1 21 4 16 12 6 7 20 ...

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Page 20: ... of printing and are subject to change without notice REMARKS a Do not touch the hot part or the hot and cold parts at the same time as you are liable 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 instrument such as an oscilloscope to the hot and cold circuits simultaneously as this may cause fuse failure Connect the ...

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Page 27: ...CONDUCTOR VIEWS FOR MODELS TX 21JT1P TC 21JR1P TX 14JT1P TC 14JR1P Y BOARD TNP8EY011 TRAN S Q351 B2 Q352 C1 Q353 A2 Q354 C1 DIODES D351 C1 D352 C1 D353 C1 D354 C1 T P S TPY4 B2 TPY5 B1 A 1 2 C B 27 ...

Page 28: ... G6 D3108 C6 NO NO Q1201 G1 D555 F6 Q1202 E2 D556 F6 I C S Q1203 E2 D557 E5 IC251 D3 Q1204 E2 D801 G2 IC451 E6 Q1205 C3 D802 G2 IC601 B4 Q1207 C4 D803 H2 IC602 B3 Q1208 C4 D804 H2 IC603 B3 Q1209 C4 D805 F2 IC801 G3 Q1210 E3 D808 G3 IC851 E5 Q1211 C3 D809 G3 IC852 E4 Q1212 D2 D810 G4 IC853 D5 Q1213 C4 D811 G3 IC1201 D2 Q1214 C4 NO NO D812 G3 IC1202 D1 Q1215 B4 NO NO D814 E2 IC1204 G1 Q1216 D2 NO NO...

Page 29: ...29 1 2 3 4 5 6 H G E F A B C D E BOARD TNP8EE007 ...

Page 30: ...30 NOTES ...

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