Fan Control Circuit - Panasonic PT-CW230E Service Manual

Chassis Block Diagrams

Fan control circuit

12
13
14
IC7881
DAC
<M62393>
15
4
5
2,3
135
143
98
SDA2_DAC
223,304
16VF
Q7811
FAN_CONT1
Q7821
FAN_CONT2
Q7831
FAN_CONT3
Q7841
FAN_CONT4
Q7851
FAN_CONT5
Q7861
FAN_CONT6
Q7801 Q7802
FAN_SW_BUFF
PFAIL LOGC ICs
PFAIL
IC5851, IC5852
Error: H
SIGNAL/MODE
POWER-ON
FAN_SW_BUFF
H
POWER-ON
LAMPCTRL
H
NORMAL
PFAIL
L
<LAMP>
SCL2_DAC
IC8821
TEMP.
SENSOR B
Q7871
<MCP9801>
Q7872
2 1
SCL2
SDA2
D7811
IC7811
FAN1
D7821
IC7821 FAN2
D7831
FAN3
IC7831
D7841
FAN4
IC7841
D7851
FAN5
IC7851
D7861
FAN6
IC7861
Q7891
PFAIL_FAN
Error: L
Fan Error: On
STAND-BY
L
STAND-BY
L
ERROR
2
H
1
LAMPCTRL
TEMP SENSOR 1
<ROOM>
IC8801
TEMP.
SENSOR A
<MCP9801>
2 1
4 3
-42-
D7812
K8B K07A
9
D7702
11
D7703
13
D7704
15
D7705
17
5
D7706
Fan Error: H
40
FANNET
IC4721
NAND
4
TEMP SENSOR 2
<DMD>
IC8811
TEMP.
SENSOR C
<MCP9801>
2 1
4 3
K8E K8H
MAIN
FN901
K8F
1
2
FN902
K77B
1
2
FN903
K77C
1
2
FN904
K77D
1
2
FN905
K77E
1
2
FN906
K77F
1
2
LAMP
K47A
BALLAST
BOARD
4
SW901
K47B
LAMP
2
COVER
1 1
SW
3