Hitachi CP-X505 Service Manual page 14

Power can not be turned on
Are
voltage
supplied at pins
(9),(12) and (14) of E800 on
the PWB assembly MAIN in
standby mode?
(9): +6.0V
(12): +4.0V
YES
(14): GND
Are
voltage sup-
plied at pins (2) and (7)
of E800 on the PWB assembly
MAIN in standby
mode?
(2): +15V
(4): GND(for +15V)
YES
(7): +17V
(11): GND(for +17V)
Does
LAMP (DK03) or
TEMP (DK02) indicator light
or blink?
Measure
resistance*
between pins (1) and
(2) of E808 when the
S941 is pushed.
0Ω
PWB assembly MAIN
CP-X505(EDX35N)
*: Be sure to unplug the power cord before measuring resistance.
resistance* between
NO
pins (9) and (14), and
between pins (12) and
Disconnect TSW
from power unit circuit, and
measure resistance of
Power unit (circuit)
NO
tance* between pins (2)
and (4), and between pins
(7) and (11) of
Power unit (circuit)
YES
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Open
PWB assembly SW
E808, E941
Lamp door Re-attach lamp
door
14
Measure
0Ω
(14) of E800.
Open
Open
TSW.
Short
Fuse on the power unit
Mea-
sure resis-
0Ω
E800.
Open
PWB assembly MAIN
Power unit (circuit)
Thermal switch (TSW)
(circuit)
PWB assembly MAIN
Power unit (circuit)