6 6
F. TROUBLE SHOOTING OF LUMINANCE IN THE PLAYBACK MODE.
IS Y-FM SIGNAL FROM PIN 7 OF
IY04 FED TO PIN 15 OF IY01 ?
CHECK PREAMP CIRCUIT
IS ON/OFF 5V SUPPLIED TO PIN 36
AND PIN 47 OF IY01 AT 5 VOLTS ?
CHECK ON/OFF 5V
IS THE LUMINANCE SIGNAL FROM
PIN 15 OF IY01 FED TO PIN 25 OF
CHECK QCY07, LY08, LY06,
CCY93, CCY42, CCY92, RCY52.
IS THE LUMINANCE SIGNAL FROM
PIN 25 OF IY01 FED TO PIN 26 OF
CHECK QCY03, RCY53, RCY39,
CCY70, CCY46, RCY02.
IS THE LUMINANCE SIGNAL FROM
PIN 26 OF IY01 FED TO PIN 38 OF
CHANGE IY01
TO TV PART.
OK
OK
OK
OK
OK
NG
NG
NG
NG
NG
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 ...