10-5
NOTE:
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
4. Inverter Block Diagram (sub Inverter CBA)
When you conduct on a component level repair for the Inverter CBA for any models within this service manual,
make sure to refer the right Block Diagrams, Schematic Diagrams/CBA and Parts List.
For the main CBA, the last digit of the board number, which is engraved on every board, should be a number(e.g. BA17F4F0103 2).
For the sub CBA, the last digit of the board number, which is engraved on every board, should be an alphabet(e.g. BA17F4F0103 Z).
INVERTER CBA
CN1001
PROTECT3
10
BACKLIGHT-ADJ
12
VCOM
2
BACKLIGHT-SW
11
TO
SYSTEM
CONTROL
BLOCK
DIAGRAM
(CN650)
T1950
10
11
14
15
2
3
4
5
7
8
14
3 2
Q1970
(FEED BACK)
(ISOLATOR)
Q1971
IC1930
14
3 2
IC1931
Q1931
TO
POWER
SUPPLY
BLOCK
DIAGRAM
(CN600)
HOT
COLD
HOT CIRCUIT. BE CAREFUL.
Q1972
SWITCHING
Q1930
CN1901
Q1932
LCD MODULE
ASSEMBLY
+B1
INV+20V4
HOT-GND3
10
CN1003
VCOM
IC1200
(PWM CONTROL)
BACK
LIGHT
1
2
1
2
CN1101
CN1102
BACK
LIGHT
T1101
Q1201
Q1300
Q1303
Q1700
T1102
OUTPUT
PROTECT
STB
DUTY
LOGIC
PWM
FEED
BACK
SWITCHING
Q1701
SWITCHING
Q1702
SWITCHING
Q1703
SWITCHING
24
21
13
18
12
16
7
17
4
2
Q1202
Q1301
T1100
BACK
LIGHT
1
2
CN1100
4
1
3
7
6
8
5
2
4
1
3
7
6
8
5
2
4
1
3
7
6
8
5
2
SW+10.5V
A17FYBLINV2
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