Hitachi C47-WD7000 Service Manual page 18

TROUBLE SHOOTING
CHECK DCU input ;
is Voltage at LK04/KC01
(LK03/KC02)5V?(-5V?)
CHECK DCU input ;
LK02 (V.BLK)
(*1) PDCU 4 pin (RH)
PDCU 6 pin (GH)
PDCU 8 pin (BH)
GND
16～17[ms]
A
OK
...(*3)
OK
(*2) PDCU 5 pin (RV)
PDCU 7 pin (GV)
PDCU 9 pin (BV)
GND
Vpp =2～5 [V]
IK01
NG
SW ＋7V line (EK01)
QK01
NG
DEFLECTION circuit
CHECK
RK53,54,57,58,69,70,73,74,61,62,
65,66
CY Amp (IK40,41),
16～17[ms]
18
CHECK
CHECK
(*3) LK02 (V. BLK.)
GND
16～17[ms]
Vpp =4～5 [V]