93
DP
55
2
.
23
TROUBLE SHOOTING
2
.
23
.1 TROUBLE SHOOTING for POWER CIRCUIT
No raster and no power (How to check LED’s Diagnosis)
Is click sound
of Relay heard?
Are 2 Green LEDs
turned OFF at the
same time?
I942, I901,
I901, I904, F902
Check
Check
No
Raster
Has Fuse FP01
blown?
F903, I902,
Q982, I941
YES
YES
YES
YES
NO
Is base Voltage
Of Q709 normal?
Does raster
Appear with (7) and (17)
Of PPT3 shorted?
Are Voltages
At both ends of T702
(primary side)
normal?
PDT2 pin(9)
-H out,
PDT3 pin(3)
-DEF 10.5V
etc.
T702, R748,
R730
etc.
Q777, QH01,
T701, TH01
etc.
NO
NO
YES
YES
Is Voltage
at pin(6) of PPT3
(R946) 2.5V?
Check
Check
Check
Check
IP01, TP01,
DP05, DP02,
etc.
Replace FP01
Check
Q943, S902
Check
DIGTAL
MODULE
YES
Check
Find LED(s) that is
Turned dark or OFF
Earlier than the other.
Check
(Signal Power)
(Signal Power )
(Signal Power)
(Def P
ower
)
(Def P
ower
)
(Def
Power
)
(Signal Power)
(Def P
ower
)
Is Voltage
at D943(K) 5V?
(DJ03 ON?)
SW+28/-28V line
EP40, EP41,
DP40, DP42,
etc.
SW+115V line
EP45, DP46,
Q777, QH01,
Q701, TH01,
T701
etc.
Q980, Q981,
Q901 etc.
(Def P
ower
)
NO
NO
NO
YES
NO
NO
NO
1.Turn OFF
the power SW.
2.Wait for 3 seconds.
3.Turn ON again after
several seconds,and
observe green LEDs
carefully.
YES
(Signal Power)
Is Voltage
at pin(A) of Q982
5.8V?
(DJ02 ON?)
DP59
DP48
Содержание 51F710A/DP55
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Страница 102: ...DP55 CIRCUIT BLOCK DIAGRAM TABLE OF CONTENTS 101 ...
Страница 103: ...DP55 CONNECTION DIAGRAM TABLE OF CONTENTS 102 ...
Страница 107: ...106 DP55 CPT P W B TABLE OF CONTENTS ...
Страница 109: ...TABLE OF CONTENTS FINAL WIRING DIAGRAM TABLE OF CONTENTS TABLE OF CONTENTS DP55 108 ...
Страница 110: ...TABLE OF CONTENTS FINAL WIRING DIAGRAM TABLE OF CONTENTS TABLE OF CONTENTS DP55 109 ...
Страница 111: ...TABLE OF CONTENTS TABLE OF CONTENTS TABLE OF CONTENTS FINAL WIRING DIAGRAM TABLE OF CONTENTS TABLE OF CONTENTS DP55 110 ...
Страница 112: ...TABLE OF CONTENTS TABLE OF CONTENTS TABLE OF CONTENTS FINAL WIRING DIAGRAM TABLE OF CONTENTS TABLE OF CONTENTS DP55 111 ...
Страница 113: ...TABLE OF CONTENTS TABLE OF CONTENTS TABLE OF CONTENTS FINAL WIRING DIAGRAM TABLE OF CONTENTS TABLE OF CONTENTS DP55 112 ...
Страница 114: ...TABLE OF CONTENTS TABLE OF CONTENTS TABLE OF CONTENTS FINAL WIRING DIAGRAM TABLE OF CONTENTS TABLE OF CONTENTS DP55 113 ...
Страница 153: ...BACK TO TABLE OF CONTENTS PRINTED CIRCUIT BOARDS DP55 SIGNAL PWB Solder side DP55 152 ...
Страница 157: ...BACK TO TABLE OF CONTENTS PRINTED CIRCUIT BOARDS DP55 DEFLECTION PWB Solder side DP55 156 ...
Страница 161: ...BACK TO TABLE OF CONTENTS PRINTED CIRCUIT BOARDS DP55 CPT PWB Solder side DP55 160 ...
Страница 187: ......
