Mitsubishi Electric 1786FD2 Service Manual page 82

MEA 1786FD2 CRT Monitor Service Guide
6. CHECK IC201(TDA4856)
CHECK PIN6,PIN8
OK
OUTPUT
(FREQ & DUTY)
CHECK
Q301,Q310,Q311
Q201
NG
OK
NG
CHECK OUTPUT
STAGE
REPLACE
DEFLECTION OUTPUT
ABNORMAL
YES CHECK PIN10(VCC)
=12V ?
NG
CHECK PIN30 NO
>4.4V ?
YES
CHECK
R251,R253
CHECK
R249,C216
R215,R214
C210
YES
REPLACE
IC201
OK
CHECK FBT(T301)
NO
YES
CHECK
SUSPEND SIGNAL
="HIGH"
NG
REPLACE
NO
CHECK
Q702
NG
OK
CHECK
POWER SUPPLY
Trouble Shooting
CHECK +14V
YES
CHECK Q701
EMITTER
NO
=14V
CHECK
POWER SUPPLY
YES
NG
CHECK
REPLACE
Q702
Q701
OK
CHECK +14V
TRACE SHORT?
REPLACE
SHORT
COMPONENTS
7