Service Manuals, User Guides, Schematic Diagrams or docs for : . Various CCFL CIRCUITS CCFL Circuits ALPS Inverter UHP061104 for NEC LCD1830
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V++
CN1 F1 Power supply: 13V
(Voltage dependable on monitor brightness setting?)
1
2 R1
3
2
Q3 + C1 2k2
4 330u D3a Q2
5
6 Lamp On/Off 1
7 Off: 0V BR
On: 3.7V 15
10k R2 R31
43
10k
Q4a
5
D2
4
3
2
1
Q10
C3
V+ Cmp
FR
3
C9 Enable 5102
100n Fast switching off Q1
R8 R7 R6
6k8 15k 10k
R10
R19 C15 R17 R20 C17 1k0
5
6
7
8
3
1
680k 2.2uF 270k 680k 2.2uF 5 Q5 C4
+ 2 7 LM339 R32
D4 4 U1B + 1 2 2k2
R34 - 6 U1A
-
1
1
C26 Q12 Q13 10k 6V2 'C2'
1.4uF C8 C7 26
U1C
12
2 2
3
9 V++ C10 ?
14 + R9
25 25 8 1k0
-
3
3
D3b
L1
R3 1k6
V+ Cmp 33uH
2
R18 C6 Q6
100k C16
U1D 1.0uF C5 1
- 10 2.2uF D1
13
+ 11 15
6
Q4b
3
2
R36 R4
4k7 1k3
D2
1
1
Q14
C27 1.4uF 1 T1 9
2 V++
8
26 R33 5
Idem. 10k 2
3
CN4 P.1
1
Q11
Lamp
2 C20
3 ?
C11 7
26
D12a D12b ?
3
D11b D9b Measure lamp current 4 6 C21
0.27V CN5 P.2 CN4P.2
?
Lamp
0053 1707S
CN5 P.1
R30 C25 D11a R28 R29 C24 D9a R25
68k ? 680 68k ? 680
Q8 Q9
FMMT619
540 540
FMMT619 R1112 R1112 Title
Inv erter Board ALPS UHP061104 NEC LCD1830
Size Document Number Rev
B Rev erse engineering: Marc Nijdam 1.0
Date: Tuesday , Nov ember 01, 2005 Sheet 1 of 1
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