Hitachi CP-X2520 Service Manual page 12

CP-X2520 ( M2-25ED ) / CP-X3020 ( M2-30ED )
Power can not be turned on
Are
voltage
supplied at pins (3)
and (5) of E800 on the PWB
assembly MAIN in standby
mode?
(3): +15V
(5): GND
YES
Are voltage
supplied at pins (7),
(9), (11) and (15) of E800 on the
PWB assembly MAIN in
standby mode?
(7): +17V
(9): GND(for +17V)
YES
(11): +6.0V
(15): GND
Does
LAMP (D303) or
TEMP (D302) indicator light
or blink?
NO
Measure
resistance* between
pins (1) and (2) of S801 when
the lamp door is secure.
0Ω
PWB assembly MAIN
*: Be sure to unplug the power cord before measuring resistance.
Measure resistance*
NO
between pins (3) and (5) of
E800.
Disconnect TSW
from power unit circuit, and
measure resistance of
TSW.
Power unit (circuit)
Measure
resistance* between
NO
pins (7) and (9) and between
pins (11) and (15) of
E800.
Power unit (circuit)
YES
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Open
Lamp door
Re-attach lamp
door
Re-attach PWB
assembly MAIN
12
0Ω
Open
Open
0Ω
0Ω
Open
PWB assembly MAIN
Power unit (circuit)
Thermal switch (TSW)
PWB assembly MAIN
Power unit (circuit)