Philips LC3141 Service Manual - Page 7

Power Supply Board - electronics

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to PSB to SSB Lamp supply board 1902 +300V 1 2 3 Lamp Lit 2 1 Lamp EN Control Lamp is on Start LC3131/LC3141 5-5 5-6 LC3131/LC3141 DRIVE PROCESSING Supply Lamp D8 I2C3 D5 I2C Microprocessor STRB3 Sub-sampling R RDA GDA BDA D3 Gamma D6 Sub-sampling G D5 LCD R Clock driver (level conversion) D6 LCD G Clock driver (level conversion) POWER SUPPLY BOARD K4 100- 2 250V 1 AC Autovoltage +295V +295V Standby supply +5 STBY Main supply +15V +14V +5V1 26645004_034.eps 160402 K1 2 To lamp 1 supply panel 2 3-4 7-9 10 To system 8 electronics board 5-6 D4 Uniformity Correction D2 I2C I/O expanders D7 Sub-sampling B NRS LCCOM UD LR D4 NERP D7 LCD B Clock driver (level conversion) Clock generation D3 7050/7051 L3EO7030 F0A DRE0-9 3 12 Contrast Bright Gamma 3V3 1 59 Polarity Invert 49 26645004_035.eps 130502 RD0-9 Serial Interface POW-ON 1 K3 26645004_042.eps 160402 PCS 107 370 PCS 107 371 30 29 28 SCS SDATA SCLK 80 GAMMA CORRECTION WHITE POINT SETTING 26645004_036.eps 160402

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LC3131/LC3141
LC3131/LC3141
5-5
5-6
PCS 107 370
PCS 107 371
26645004_034.eps
160402
Control
Supply
Lamp
Lamp is on
Start
to SSB
3
Lamp Lit
Lamp EN
2
1
1
2
+300V
1902
Lamp supply board
to PSB
26645004_042.eps
160402
POWER SUPPLY BOARD
K4
K1
To lamp
supply
panel
To system
electronics
board
100-
250V
AC
2
1
2
1
2
3-4
7-9
10
8
5-6
1
Auto-
voltage
+295V
+295V
+5 STBY
+15V
+14V
+5V1
POW-ON
Standby
supply
Main
supply
K3
DRIVE PROCESSING
26645004_035.eps
130502
Clock
driver
(level conversion)
Clock
driver
(level conversion)
Clock
driver
(level conversion)
Sub-sampling
R
Sub-sampling
G
Gamma
RDA
NRS
LCCOM
UD
LR
NERP
GDA
BDA
I/O
expanders
D3
Microprocessor
D8
D2
Uniformity
Correction
D4
D4
D7
D6
D5
D7
D6
D5
Sub-sampling
B
LCD
R
LCD
G
LCD
B
Clock generation
I
2
C
I
2
C
I
2
C3
STRB3
26645004_036.eps
160402
Contrast
Bright
Serial
Interface
59
1
3V3
49
3
12
30
SCS
SCLK
SDATA
29
28
80
DRE0-9
RD0-9
7050/7051
L3EO7030 F0A
D3
Gamma
Polarity
Invert
GAMMA CORRECTION
WHITE POINT SETTING