Hitachi 42HDF39 Service Manual page 25

Power board issues
1. No power
NO POWER
FUSE
OK
STB
check voltage
D020(k)-J051
OK
Under 130V
See NO PICTURE &
SOUND
IC101, R005
2. No picture and sound
NO PICTURE &
SOUND
OK
OK
See NO PICTURE
NO Vs, Va, Vcc, STB
NG
NG
Over 130V
D151, D101 etc
NO Vs, Va, Vcc,
NG
FUSE
NG
Vcc
Under 130V
impedance check
D001
OK
impedance check
Q003/Q004
OK
impedance check
Q201
OK
impedance check
Q301
check voltage
D020(k)-J051
IC001, D601~D604, RL001,
PC001, PC003, IC002 etc
25
NG
NG
Q003/Q004/R005 ect
NG
Q200/Q201/Q202/D210
NG
Q301/Q302/Q303/D310
SEE NO POWER
Over 130V
PC201, PC202, D210
D001
ect
ect
etc