Fan Control Circuit - Panasonic PT-VX400U Service Manual

Chassis Block Diagrams

Fan control circuit

Q7805
S16.5V
349
FAN_SW3
Power-On:H
POWER_SW
190
FAN_SW1
420
FAN_SW2
373
FAN_CON_C
30
FAN_CON_A
128
FAN_CON_B
215
P_FAIL
SIGNAL/MODE
FAN_SW1
FAN_SW2
P_FAIL
29
FAN_ERR_C
267
FAN_ERR_B
ERROR on
FN901
FN902
FN903
FN904
FN905
FN906
293,212
SCL0
SDA0
MAIN
C7801
~
C7804
K7801
1
K8Q
Q7811 Q7812 Q7807
3
1
FANC
IC7841
4
2
Q7842
IC7811
1,14
<TPS54286>
5
6
Q7814
Q7801
Q7802
POWER-ON STAND-BY
H L
NORMAL ERROR
H L
P_FAIL FAN_ERR_B FAN_ERR_C
L - -
L - -
L - -
L L -
L L -
- - H
IC8831 IC8821
TEMP. SENSOR C TEMP. SENSOR B
< > < >
ADT75BRMZ ADT75BRMZ
(LAMP) (PANEL)
SUB POWER
BOARD
TPFANC
D3802
TPFANA
3
FANA
12
8
7
Q7813 Q7864
TPFANB
FANB
P_FAIL
FAN_ERR
Power Error: On
FAN_ERR_B
23
SCIOUT
IC9001
DIMMER CONTROL
<LE308030F0A>
R/C
IC8811
TEMP. SENSOR A
< >
ADT75BRMZ
(ROOM)
-62-
K8G
K8N
D3621
D3613
K8M
D3622
K8L
D3623
K8K
D3626
D3614
K8J
D3627
Q3601
P_Fail: H
D3636
D3637
K8H
Q3603
IC9886
INVERTER
1
K8S
4
2
Error: H
MAIN BOARD
FN906
1
2
FN901
1
2
FN902
1
2
FN903
1
2
FN904
1
2
FN905
1
2
1
LAMP
BALLAST
BOARD
1
SW901
1
LAMP
COVER
SW
2