Philips 26MD257B/37 Service Manual page 138

36 TPM1.0U LA
Scaler Board Schematic Diagram-LVDS INPUT
1 2
A
DV33
DV33
B
C
D
FOR LARGE PANEL(26"/32"/37"/42")
DV33 +5V_SW DV33
OPWM1(PWM for Bright_Adj):
Max: 0V
Min: +3V3 R851 R852
R866 NC/4K7 1/10W 4K7 1/10W
4K7 1/10W
E
0R05 1/10W
R858 R853
OPWM1 Q851
1
MMBT3904
4K7 1/10W
R859
OPWM2
NC/0R05 1/10W
F OPWM2(PWM for Bright_Adj):
BRIGHT ADJUST
Max: +3V3
Min: 0V
+5V_SW
DV33SB
R854
PWR_S6(OPCTRL6):
R856 NC/4K7 1/10W
Inverter on: Low
10K 1/10W
Inverter off: High
R857
G PWR_S6
1
4K7 1/10W
INVERTER ON/OFF
H
1 2
3 4 5
CN850
2 1
4 3
6 5
8 7
10 9
12 11
14 13
16 15
18 17
20 19
22 21
24 23
26 25
28 27
30 29
32 31
34 33
36 35
38 37
40 39
60949
MAX_BRIGHT
R858 R859
ADJUST VOLT
3V3 YES
0 NO
R850
BRIGHT_ADJ
100R 1/10W
C851
NC/10U 16V
Bright_Adjust
C851
Control
DC Control YES
PWM Control NO
LPL 26/32/37/42
DV33
R855
2K 1/10W
INVERTER_ON_OFF
Q850
MMBT3904
3 4 5
7. Circuit Diagrams and PWB Layouts
6 7 8
S-16
1 2
PANEL_VCC
FB851
220R/2000mA
1 2
FB852
220R/2000mA
1 2
FB853
220R/2000mA
C850
1,2,12,13,14,15,17
100N 16V
2,3,4,5,6,7,11,13,14
1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,17
NO
YES
6 7 8
9 10
PANEL_VCC
2 PANEL_VCC
+5V_SW
+5V_SW
DV33
DV33
DV33SB
2,5,6,7,15 DV33SB
AGND_LVDS
AGND_LVDS
OPWM2
5 OPWM2
OPWM1
5 OPWM1
PWR_S6
5 PWR_S6
BRIGHT_ADJ
1 BRIGHT_ADJ
INVERTER_ON_OFF
1 INVERTER_ON_OFF
CTRL_1
5 CTRL_1
CTRL_2
5 CTRL_2
A0P
5 A0P
A0N
5 A0N
A1P
5 A1P
A1N
5 A1N
A2P
5 A2P
A2N
5 A2N
CK1P
5 CK1P
CK1N
5 CK1N
A3P
5 A3P
A3N
5 A3N
A4P
5 A4P
A4N
5 A4N
A5P
5 A5P
A5N
5 A5N
A6P
5 A6P
A6N
5 A6N
CK2P
5 CK2P
CK2N
5 CK2N
A7P
5 A7P
A7N
5 A7N
LVDS SIGNAL
9 10
11
A
B
C
D
E
F
G
H
11