Hitachi 42PD8900TA Service Manual page 38

Power unit
(1)
NO POWER
OK
impedance check
FUSE,R004,R005
NG
STB
OK
check voltage
D011(k)-Q101 Heat
Sink
under 130V
See NO PICTURE Q101, IC101
& SOUND 1 etc
(2)
NO PICTURE
& SOUND 1
STB
OK
OK
Vcc
See NO PICTURE
& SOUND 2
(3)
NO PICTURE
& SOUND 2
impedance check
Vs LINE
OK
impedance check
Va LINE
OK
SW ON
Va:no uprise Vs:no uprise
Vs:down after up Va:down after up
Q301,Q303, Q501,D510,
PC301,PC302 Q500,PC501,
D310,etc PC502,etc
42PD8900TA
NO Vs,Va,Vcc,STB
NG
over 130V
IC101, D150
etc
When only R005/R004 is defective,
replace together R005 and RL002.
NO Vs,Va,Vcc
NG
check voltage
NG
D021(A)-Q101 Heat
Sink
IC001,D601 D604,RL001,
PC601,PC003,IC202,etc
NO Vs,Va,Vcc
NG
NG
open connector
CN64
OK
impedance check
Va LINE
NG
D351
38
impedance NG
check D001
OK
NG
impedance check
Q003/Q004
OK
Q003/Q004
R004,R005 etc
impedance NG
check Q101
OK
Q101,IC101
R004,R005 etc
impedance NG
check Q201
OK
Q201,IC220
Q200,D210 etc
NG
impedance
check Q301
OK
Q301,IC303
D310 etc
See NO POWER
over 130V
PC201,PC202,D210 etc
open connector
CN64
impedance check
Vs LINE
NG
PDP module
D551,D550
Va NG
D001
OK
PDP module
Vs NG