Fan Control Circuit - Panasonic PT-TW230U Service Manual

Chassis Block Diagrams

Fan control circuit

S16V
Power-On:H
190
FAN_SW1
374
FAN_CON_C
30
FAN_CON_A
120
FAN_CON_B
215
P_FAIL
SIGNAL/MODE
FAN_SW1
P_FAIL
293,212
SCL0
SDA0
IC7841
Q7842
IC7811
1,14
<TPS54286>
5,6
7
Q7813
Q7814
Q7801
POWER-ON STAND-BY
H L
NORMAL ERROR
H L
IC9885
11
LAMP_SCI
SUB CPU
<MB95F353>
IC8821
TEMP.
SENSOR B
<MCP9801>
2 1
TPFANC
FANC
TPFANA
D3644
3
FANA
12
D3613
8
Q7864
TPFANB
FANB
D3614
Q3601
P_FAIL
FAN_ERR
Power Error: On
IC4891
NAND
1
2
TEMP SENSOR A TEMP SENSOR C
<ROOM>
IC8811
TEMP.
SENSOR A
<MCP9801> <MCP9801>
2 1
4 3
K8L
-61-
K6K
1
2
D3626
K6J
1
2
D3629
K6F
1
2
D3621
K6G
1
2
D3622
K6E
1
2
D3623
K6P
1
2
D3628
K6Q
1
2
1
D3631
P_Fail: H
K8H
1
1
K8S
4
2
<LAMP>
IC8831
TEMP.
SENSOR C
2 1
4 3
K8I
MAIN BOARD
FN905
FN901
FN902
FN903
FN904
FN906
FN907
LAMP
BALLAST
BOARD
SW901
LAMP
COVER
SW