Hitachi 61HDX98B Manual page 94

T R O U B L E S H O O TING (NO R A S T E R N O P O W E R
DP-85 CHASSIS TROUBLESHOOTING
1.) No Raster and No Power
(Deflection PWB)
B
A
(Signal PWB)
No Relay Click Heard
(Signal PWB)
No
Is Voltage
at pin (33) of
I001 5V?
Yes
(Signal PWB)
No
Is Voltage
at pin (53) of
I0015Vdc?
Yes
(Signal PWB)
Check Q007
(Power PWB)
D960, S901
(Deflection PWB)
Is Voltage at pin (5)
of IP01 21V-24V?
(Deflection PWB)
Has Protector
EP91 blown
(Deflection PWB)
IP01, DP04,
Replace EP91
DP-8 X S eries Chassis.
(Power PWB)
Green LEDs Should be ON
(Signal PWB)
Check
Q001, D007,
L001, L004
(Signal PWB)
Is Voltage
at pin (6) of I001?
AC Clock In
2.5Vdc?
Yes
(Signal PWB)
Check I001
I003 Reset IC
X001 Crystal
No
Yes
No
Yes
Check
(Signal PWB)
Check
No
Q015, Q016
I003 Reset IC
X001 Crystal
(Power PWB)
I906, D909
(Deflection PWB)
Check
DP02, RP05,
RP06, CP05
(Deflection PWB)
Check
IP01
P A G E 0 9 - 0 2