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Aiwa TV-CN143, Service Manual

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SERVICE  MANUAL

DA

TA

COLOR TELEVISION

TV-CN143

NH

S/M Code No. 09-003-415-9S1

SUPPLEMENT

•

 This Service Manual contains the additional information “NOTICES BEFORE

  REPAIRING”, “DISASSEMBLY INSTRUCTIONS” and “ADJUSTMENT” for the
  model TV-CN143 (NH).
  If requiring the other information, see Service Manual of TV-CN143 (NH),
  (S/M Code No. 09-99B-415-9R1).

Summary of Contents for TV-CN143

Page 1: ...415 9S1 S U P P L E M E N T This Service Manual contains the additional information NOTICES BEFORE REPAIRING DISASSEMBLY INSTRUCTIONS and ADJUSTMENT for the model TV CN143 NH If requiring the other in...

Page 2: ...parts in the original positions 5 Take care of the cathode ray tube By setting an explosion proof cathode ray tube in this equipment safety is secured against implosion However when removing it or ser...

Page 3: ...would come off from the CRT anode button easily causing an accident Do not turn the anode cap 3 If the anode cap is turned in the direction of its circumference the hook is likely to come off 2 2 Anod...

Page 4: ...cap after installing it Never re use the hook when it has been deformed 1 If the anode cap is turned after it is installed it may come off Therefore arrange the high voltage cable before attaching the...

Page 5: ...uld turn and cause an installation defect 4 Turn over the rubber cap symmetrically on the left and right See Figure 3 4 Caution Take great care not to damage the anode cap Figure 3 3 5 Fit your forefi...

Page 6: ...turned over and visually check that the hook is engaged securely 9 Release your hand from the rubber cap of the anode cap Caution Cover the anode cap so that it does not lift 10 Hold the skirt of the...

Page 7: ...01 CN802 Degauss cord 1 Disconnect CN903 CRT GND 2 Disconnect CN901 CN902 3 Remove the NK C B in the direction of arrow 1 See Figure 4 1 5 MAIN C B PWB MAIN REMOVAL 1 Remove connector CN401 2 Remove c...

Page 8: ...about 0 3 V with flat envelope Confirm that ratio of the burst signal amplitude and the red signal amplitude is 0 30 0 66 If the output signal does not conform with the specifications calibrate the pa...

Page 9: ...se looking from the CRT s back screen and disengage Be careful not to loose the lock ring too much If the magnet assembly has become shifted during adjustments secure it to the position in Fig 1 4 3 B...

Page 10: ...g at the screen adjust the tilt of the deflecting yoke and tighten the DY lock screw 8 Shift the magnet assembly to the front toward the CRTfunnel stop movement before the adjustment position and then...

Page 11: ...and the surface of the CRT funnel in order to secure the deflecting yoke Refer to Fig 1 9 Position of wedge Fig 1 9 Wedge Wedge Wedge In Fig 1 8 the two 6 pole magnets are stacked together so as to be...

Page 12: ...1 R905 R906 R902 S901 R903 TP902 12 BT301 C332 TP201 AFT IC301 J403 J401 IC402 IC303 L205 VCO L201 SIF TP302 TP203 DE EMPHASIS IC3 IC1 TU101 J402 FOCUS SCREEN T601 FBT SFR T601 FBT 3 TP101 RF AGC TP10...

Page 13: ...Measuring instrument Pattern generator Using the volume keys on the jig remote controller adjust the dot position to the exact vertical centre position in the crosshatch screen Fig 1 2 1 3 V SIZE Vert...

Page 14: ...is case adjustment is possible if there is a load on ANT 1 6 RF AGC RF AGC Adjustment Menu Screen PAGE 1 6 Input signal ANT RF INPUT Test point TP 101 RF AGC TU101 1 pin Measuring instrument Oscillosc...

Page 15: ...6 for several times and adjust for whitest look Focus Adjustment Input signal Dot pattern Adjustment point SFR located at upper part of FBT T601 Measuring instrument Pattern generator Adjust SFR which...

Page 16: ...se the volume keys on the jig remote controller to align each bottom point of the waveform tangential to the linear ramp as shown in Fig 3 3 3 4 SUB COLOR Sub color Adjustment Adjustment Menu Screen P...

Page 17: ...tment method receives nomal broadcasting Mode TUNER Test point INPUT TP 102 IF TU101 11 pin or Receiving condition OUTPUT TP 201 AFT IC301 44 pin Adjustment point L205 P IF Measuring instrument Oscill...

Page 18: ...FINISH key on the jig remote controller Do not press this key during general repairs Aging Mode Operation Method Make sure that confirmation when replacing EEP ROM 1 Enter to the aging mode by pressin...

Page 19: ...ures Sample calculation of displayed hexadecimal figures AFT OK 1234 H MONO Adjustment Mode Operation Method 1 Return to the aging display by pressing the SYSTEM key and press TEST key once again to e...

Page 20: ...2 11 IKENOHATA 1 CHOME TAITO KU TOKYO 110 JAPAN TEL 03 3827 3111 Printed in Singapore 9820572 0251431...

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