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Troubleshooting
NO POWER
IC301
SYSTEM
CONTROL
Check that the LAMP_POW
signal at pin 2 of IC2882 is
correct.
Refer to next page
IIC BUS
17-18
16
IC1803
14
15
13
19
IC1804
18
IC1806
IC1808
6
2-5
8
Check that the 5V_SW signal
at pin 11 of K3D is correct.
H : Power ON
Check that the LAMP_BST_SW
signal at pin 12 of K3D is correct.
H : Power ON
IC2882
2
4
-32-
KEY SWITCHES
KEY SW
POWER LED
READY LED
TEMP LED
LAMP REP. LED
FAN_DRIVE
(Power-On: H)
FAN CONT1
POWER_FAIL
(Abnormal: L)
KEY SW.
LAMP_ERR
(Abnormal: H)
Check that the
POWER FAIL signal
at pin 6 of IC1808 is
correct.
L : abnormal
AC INPUT
LAMP_BST_SW
LAMP_ERR
IC2883
LAMP_SW
PSDA
PSDA
ON/OFF BUTTON
INDICATOR
Check that the LAMP
LAMP
indicator and READY
indicator are lighting.
If both of indicators
READY
are not lighting,check
the primary side of
TEMP
the power supply
WARNING
circuit or S6V of
LAMP
standby power supply
REPLACE
circuit.
IC1851
POWER_FAIL
POWER_FAIL
FAN
Is fuse (F601) blown?
SW904
F601
INTER LOCK
FUSE
SW.
SW902
THERMAL SW.
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