5 4
10. TROUBLE SHOOTING CHARTS
10-1. NO RASTER
10-2. NO OSD DISPLAY
CHECK MAIN B+ ( 123V LINE )
NG.
I806 6Vout ?
Q803 BASE = H ?
CHECK HEAT VOLTAGE,
16.5V, 45V, 190V LINE
SW08,P803 SOLDER ?
TOP210 PIN VOLT ?
D825~D828,F801,R803 ?
PA805 VCR H = H ?
XN01,XN02,X701 OSC ?
RN46,47,48'S PULSE ?
IN01,I701 RESET = H ?
I701 EXCHANGE
5V VCC VOLT ?
PATTERN SHORT ?
IN01,I701 EXCHANGE ?
PA406 MON. ON = H ?
DECK SEPERATION
CHECK T801 SECONDARY
VOLTAGE 8.5V,14V,13.5V ?
CHECK H DRIVE PULSE
AT PIN3 OF PA406
CHECK H.VCC AT
PIN 37 OF I501
X501,X502 OSC OK ?
CHECK Q401,Q402,T401,C418
R401,R402,R407,R409
I301,D301,D302
CHECK DATA,CLOCK AT
PIN 7,8 OF I501.
CHECK PULSE AT PIN 6,13,38
OF I501.
CHECK PULSE R,G,B,FB AT
PIN 18,19,20,21 OF I501
CHECK CONNNECTOR PA904
P401,PA408
DECK EXCHANGE
CHECK I801 #9 VOLT
I801 #7, #1 VOLT
CHECK R817,D801~D804
EXCHANGE I801
CHECK D811 ~ D815
CHECK I802,804,805
OK
NG.
NG.
NG.
NG.
NG
NG
NG
OK
OK
OK
OK
OK
OK
OK
OK
OK
NG
OK
CHECK H,V SYNC SIGNAL
AT PIN 45,46 OF I701
CHECK V SYNC
OF P405.
CHECK H SYNC
(SC) OF PA405
CHECK OSD OSC
PULSE.
CHECK I301 AND
ADJACENT CIRCUIT.
CHECK D501
CHECK CONNECTOR
(PA406) AND PATTERN
CHECK L,C or I701
CHECK 23,24,25,26
PULSE AND VOLT
CHECK BRIGHT,CONTRAST
CONTROL = MINIMUM ?
NG
NG
NG
NG
NG
NG
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 ...