Hitachi CPX1 Service Manual page 12

Power can not be turned on
Are
voltage
supplied at pins (7)
and (11) of E800 on the PWB
assembly MAIN in standby
mode?
(7): GND
(11): +6.0V
YES
Are
voltage supplied
at pins (1) and (6) of E800
on the PWB assembly
MAIN in standby
mode?
(1): +15V
(3): GND(for +15V)
YES
(6): +17V
(7): GND(for +17V)
What are the state
of LAMP (D303) and TEMP
(D302) indicator?
Not light blink (D303)
Measure
resistance*
between pins (1) and
(2) of S801 when the
lamp door is
secure.
0Ω
PWB assembly MAIN
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CPX1(M1-20)
*: Be sure to unplug the power cord before measuring resistance.
resistance*
NO
between pins (7) and (11) of
Disconnect TSW
from power unit circuit, and
measure resistance of
Power unit (circuit)
sure resistance*
NO
between pins (1) and (3),
and between pins (4) and
(7) of E800.
Power unit (circuit)
else
Go to the next page
Open
Lamp door
Re-attach lamp
door
Re-attach PWB
assembly MAIN
12
Measure
0Ω
E800.
Open
Open
TSW.
Short
Fuse on the power unit
(circuit)
Mea-
0Ω
Open
PWB assembly MAIN
Power unit (circuit)
Termal switch (TSW)
PWB assembly MAIN
Power unit (circuit)