Block Diagram Main Display Supply (42") - Philips VE8 Service Manual

Block Diagrams, Test Point Overview, and Waveforms

Block Diagram Main Display Supply (42")

MAIN DISPLAY SUPPLY
A1 STANDBY, MAINS FILTER, PFC+AUX
5101
5103
1308
MAINS
1110
FILTER
2
T2.5AH/250V
1
A2 HIGH VOLTAGE INVERTOT
Q529.1A LA 6. 35
LOW POWER OSCILLATOR
+
HIGH EFFICIENCY DRIVER
+160V
6101
TS6B
- +
GNDHOT2
CONTROL
3134 6136 6137 6138 3118
GNDHOT1
+160V
7201
UBA2071ATS 16
VDD
3205
24
GH
22
SH
CONTROLLER
3207
18
GL
3272
1
IFB
3
VFB
15 enable
EN
13
PWMD
10 17
GNDHOT2
5002
2166 6124
5 6
7
1
3185
7104
TCET1102
STANDBY
6150 GNDHOT1
5002
16
2108
5102
15
2
14
3
4
12
7101
NCP1606BDG T3.5AH/125V
7102
5
5 11
ZCD|STDDWN
3108 3108
7
DRV
6 10
CONTROLLER 3111
4
CS
GNDHOT1 9
8
VCC
T3.5AH/125V
6105
GNDHOT1
7105
TCET1102
3118
1
FB
GND
6
GNDHOT1
HOT GROUND COLD GROUND
7210
5202
6
1 5
7211
GNDHOT2
2246 3273 2236 2231
2 4
3
3224
+160V
GNDHOT2
3240 6203
7214
TCET1102
3242 6208
7220
7212
3265 6215
+12V +12V
6210 3236
4
7202
TCET1102
3
3206
GNDHOT2
HOT GROUND COLD GROUND
+3V3-STANDBY
A3 DC-DC
5401
3408 +12V
7402
CONTROL
STANDBY
OVER VOLTAGE
+12V
PROTECTION
6120 +24V
2120
1140 6117 -VSND
2120
1141 6115 +VSND
2127
7165
TS2431
2223
3223
7203
7213 3221
1M09
+12V
1
2
N.C.
3
4
1M59
1T60
1T59
1
S_SCL
2
TO 1M59
S_SDA 3 B06A
SSB
I2C-SEL1 4
5 TO 1M59
I2C-SEL2
AL3
6
+3V3 AMBI-L
7
1T90
1M90
1
2
3
TO 1M90
4
AL3
AMBI-L
5
6
1M95
1
+3V3-STANDBY
2
STANDBY
3
4
5
TO 1M95
6
B01B
+12V
SSB
7
8
9
+VSND
10
GND-SND
11
-VSND
1P16
1
2 TO
BACK LIGHTS
3
1P19
1
2 TO
BACK LIGHTS
3
1M99
8
N.C.
BOOST 7
6 TO 1M99
DIM
B01B
SSB
Lamp on/off 5
4
3
2
1
+12V
I_17661_020.eps
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