5 7
10-7. SERVO-SYSCON CIRCUIT
A.
B.
PLAYBACK PICTURE
IS NOT GOOD.
NOISE APPEARS ALTHOUGH
ADJUSTING TRACKING.
IS CTL PULSE OUTPUT AT
P1N 92 OF IN01.
IS CTL PULSE INPUT
AT P1N 91 OF IN01.
THE VOLTAGE OF PIN 2 OF
IN01 NOT CHANGING ?
CHECK IN01
ADJUST TRACKING
NOISE APPEARS ALTHOUGH
CHANGE CASSETTE TAPE.
CHECK QCN05, CCN52 ,
CCN15, RCN35, CN59,
CN34, CN35.
CTL HEAD HEIGHT IS
NORMAL AND THERE IS
NOT DUST ?
CHECK CN01,RCN01
CHECK AND RE-ADJUST
THE PATH OF DECK.
ADJUST THE HEAD HEIGHT
AND REMOVE DUST ?
CHECK CONNECTOR PAY03
NG
NG
NG
NG
NG
OK
OK
OK
OK
OK
OK
PLAYBACK PICTURE
IS NOT GOOD.
NOISE APPEARS ON THE
SCREEN ON THE WHOLE
ARE SW PULSE AND HA SW
APPLIED TO PREAMP
CIRCUIT
IS ENVE. WAFEFORM
SUPPLIED TO PIN4 OF PY04
CHECK FLOW A.
ADJUST THE PG IN
SVC MODE
IS SW PULSE SUPPLIED
FROM PIN 18 OF IN01.
CHECK CONNECTOR,
HEAD-AMP AND HEAD DUST
CHANGE DRUM ASS'Y
CHECK CONNECTOR PY04.
CHECK DRUM P.G INPUT.
CHECK PATTERN.
CHECK VIDEO CIRCUIT.
NOISE APPEARS ON THE
SCREEN AT THE BOTTOM.
NG
NG
NG
NG
NG
NG
OK
OK
OK
OK
OK
Содержание MV1421
Страница 1: ...SERVICE MANUAL MV1421 1422 4822 34cm 48cm Televideo Effective December 1999 MV4822SERV ...
Страница 6: ...4 3 BLOCK DIAGRAM 3 1 Audio Signal Flow ...
Страница 7: ...5 3 2 Video Signal Flow ...
Страница 8: ...6 3 3 TV and monitor power switching ...
Страница 22: ...20 3 Block Diagram ...
Страница 53: ......
Страница 54: ......
Страница 55: ......
Страница 117: ...2 Main PCB Assy Circuit Diagram SECTION BEFORE AFTER MAIN TUNER ...
Страница 118: ...3 SECTION BEFORE AFTER SUB TUNER ...
Страница 125: ...10 Exploded View MV1421 model ...
Страница 126: ...11 Exploded View MV1422 model ...
Страница 127: ...12 Exploded View MV4822 model ...
Страница 128: ...13 Exploded View DVT 20F9 model ...
Страница 129: ...14 Exploded View DVT 21F1 model ...
Страница 130: ...15 Exploded View DVT 21F2 model ...