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Title
Size Document Number Rev.
Date: Sheet
of
Project Code
Reviewed By Approved By
Prepared By
Model Name
PCB P/N
PCB Rev.
Benq Corporation
OEM/ODM Model Name
48.J8601.S04
MAIN BOARD
420
DAVID HN LIN KELVIN LIAO
99.J8677.B12-C3-304-004S04
ANGEL HU
<Size>
PB610099.J8677.001
1
Tuesday, October 07, 2003
<OEM/ODM>
To repair lamp light detect signal from ballast before send to DDP1000 and main board.
L: Lamp on
H: Lamp off
L: Lamp on
H: Lamp off
3.3V for main board
3.3V for DDP1000
LAMPLITZ connected to NPN collection pin
and R6 change to 0 ohm
Generate 10mA and 0 mA to
ballast lamp sync signal
OPEN
L: Lamp on
H: Lamp off
OPEN
OPEN
L: ECO-MODE
H: Normal
C9
0.1U
25V Z
J704
20D0049108
1
2
3
4
5
6
7
8
R12
2K
Q6
MMBT2222A
1
32
TP243
R783
10K
J702
20D0038108
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
G1
G1
G2
G2
TP241
RC3
10K
R711
270
TP250
+
C828
10U M
20V
12
TP247
UL1
74AHC1G08
1
2
3
4
5
RC4
10K
C8
0.1U
25V Z
L712
80 OHM
CP8
0.1U
R7
1M
Q706
2N3904
1
32
R11
100
TP242
TP244
C823
0.1U K
C826
0.1U K
+
C7
22U
25V
12
CP1
0.1U
U4
LD1117-3.3V
GND
1
VOUT
2
VIN
3
VO
4
+
C820
10U M
20V
12
U52
74AHC1G08
1
2
3
4
5
TP248
TP251
U3
LD1117-3.3V
GND
1
VOUT
2
VIN
3
VO
4
L744
80 OHM
C827
0.1U K
Q1
MMBT2222A
1
3 2
TP245
UC2
PCA9515DP
NC
1
SCL0
2
SDA0
3
GND
4
VCC
8
SCL1
7
SDA1
6
EN
5
L710
80 OHM
L713
80 OHM
+
CP3
10U M
6.3V
12
TP249
TP252
L711
80 OHM
TP246
C824
0.1U K
R734
0
TP240
+
C821
10U M
20V
12
R735
0
R5
100KF
+
C829
22U
6.3V
12
L714
80 OHM
R784
10K