6 7
G. TROUBLE SHOOTING OF PAL COLOUR IN THE PLAYBACK MODE.
IS THE SIGNAL FROM PIN 7 OF
IY04 FED TO PIN 15 OF IY01 ?
CHECK PREAMP CIRCUIT
IS THE PAL COLOUR SIGNAL FROM
PIN 7 OF IY04 FED TO PIN 15 OF
IY01 THROUGH AMP CIRCUIT ?
CHECK AMP CIRCUIT
IS ON/OFF 5V SUPPLIED TO PIN 36
AND PIN 47 OF IY01 AT 5 VOLTS ?
CHECK ON/OFF 5V
IS THE PAL COLOUR SIGNAL FROM
PIN 15 OF IY01 FED TO PIN 48 AND
PIN 50 OF IY01 ?
CHECK IY01
IS THE SIGNAL FROM PIN 48 AND
PIN 50 OF IY01 FED TO PIN 3 AND
PIN 1 OF IY02 RESPECTIVELY ?
CHECK IY01
IS THE SIGNAL OBTAINED FROM
PIN 13 OF IY02 ?
CHECK IY01
IS THE COLOUR SIGNAL FROM PIN
13 OF IY02 FED TO PIN 45 AND
THROUGH PIN 52 AND 46 OF IY01 ?
CHECK IY01, QCY01,
RCY08, CY18.
IS COLOUR ROTARY SUPPLY TO
PIN 66 OF IY01 ?
CHECK COLOUR ROTARY
TO TV PART.
NG
NG
NG
NG
NG
NG
NG
NG
OK
OK
OK
OK
OK
OK
OK
OK
THE AMP CIRCUIT CONSIST OF
QCY08, QCY11 AND ADJACENT CIRCUIT.
Summary of Contents for MV1421
Page 1: ...SERVICE MANUAL MV1421 1422 4822 34cm 48cm Televideo Effective December 1999 MV4822SERV ...
Page 6: ...4 3 BLOCK DIAGRAM 3 1 Audio Signal Flow ...
Page 7: ...5 3 2 Video Signal Flow ...
Page 8: ...6 3 3 TV and monitor power switching ...
Page 22: ...20 3 Block Diagram ...
Page 53: ......
Page 54: ......
Page 55: ......
Page 117: ...2 Main PCB Assy Circuit Diagram SECTION BEFORE AFTER MAIN TUNER ...
Page 118: ...3 SECTION BEFORE AFTER SUB TUNER ...
Page 125: ...10 Exploded View MV1421 model ...
Page 126: ...11 Exploded View MV1422 model ...
Page 127: ...12 Exploded View MV4822 model ...
Page 128: ...13 Exploded View DVT 20F9 model ...
Page 129: ...14 Exploded View DVT 21F1 model ...
Page 130: ...15 Exploded View DVT 21F2 model ...