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KL-W7000A/W9000A
RM-Y980
1-2. SELF DIAGNOSIS CIRCUIT (A BOARD <1/3>)
IC1101
SYSTEM CONTROL
O POWER LED
35
O BS LED
37
O STBY LED
38
I LAMP PROT
39
FAN PROT 1
40
I TMP PROT
41
I FAN PROT 2
42
I FILTER COV
43
I LAMP COV
44
POW CTL
67
POWER
LAMP
STBY
LED
LED
LED
D8002
D8005
D8007
(LAMP DRIVER)
PROT
FAN 1
Q5420 etc.
(C BOARD)
TEMP
PROT
FAN 2
G BOARD
1. Incomplete installation of filter or lump
cover
When either S9551 (filter) or S9501 (lump cover) is opened,
the voltage of pin $£ and pin $¢ on IC1101 is increased over
0 V. The circuit detects that and drops the voltage of pin ^¶
on IC1101 to 0 V.
2. Burnt out of the lump
When the lump is burnt out, the voltage of pin #ª on IC1101
is increased over 5 V. The circuit detects that and drops the
voltage of pin ^¶ on IC1101 to 0 V.
3. Rising in temperature
When temperature of inside of the unit rises up, the voltage
of pin $¡ on IC1101 is increased over 5 V. The circuit de-
LAMP
tects that and drops the voltage of pin ^¶ on IC1101 to 0 V.
4. Poor ventilation (Standstill of the fan)
When the fan stops or is out of order, the voltage of either
pin $º or pin $™ on IC1101 is increased over 5 V. The cir-
cuit detects that and drops the voltage of pin ^¶ on IC1101 to
0 V.
S9551
(TB BOARD)
S9501
(TA BOARD)
– 6 –
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