Hitachi ED-X10 Service Manual page 13

Power can not be turned on
Are
voltage
supplied at pins (6)
and (8) of E800 on the PWB
assembly MAIN in
standby mode?
(6): +6.0V
(8): +4.0V
YES
(10): GND
Are
voltage supplied
at pins (1) and (4) of E800
on the PWB assembly
MAIN in standby
mode?
(1): +15V
(3): GND(for +15V)
YES
(4): +17V
(10): GND(for +17V)
Does LAMP
(D303) or TEMP (D302)
indicator light or
blink?
NO
PWB assembly MAIN
ED-X10/ED-X12(CC9XM2)
*: Be sure to unplug the power cord before measuring resistance.
Measure
resistance* between pins
NO
(6) and (10), and between
pins (8) and (10) of
E800.
Disconnect TSW
from power unit circuit, and
measure resistance of
TSW.
Power unit (circuit)
Mea-
sure resistance*
NO
between pins (1) and (3),
and between pins (4) and
(10) of E800.
Power unit (circuit)
YES
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13
0Ω
Open
Open
Short
Fuse on the power unit
(circuit)
0Ω
Open
PWB assembly MAIN
Power unit (circuit)
Termal switch (TSW)
PWB assembly MAIN
Power unit (circuit)