Block Diagram Supply 37 - Philips LC4.31E Service Manual

Block Diagrams, Test Point Overviews, and Waveforms

Block Diagram Supply 37"

SUPPLY 37"
A1 MAINS FILTER + STANDBY
5305
1308
5306 1350
1314
2
2 3
MAINS
T5AH
1 FILTER
1 4
HOT
COLD
6306
DF06M
1315
- +
T1A
2303
LC4.31E AA 6.
A2 SUPPLY
3318 2319 6304
25V_HOT
6307
GBJ6J
400V_HOT
- +
399V_HOT
5007 5008
7001
MC34067P
11
OSCC
3007
399V_HOT CONTROL
7
ERROR
7011
25V_HOT
7012
11
SOST
SOFT
START
5
VREF
+
CURRENT
1 4 PROTECTION
7004
7307
7009
TCET1102
2 3
OVER
VOLTAGE
PROTECTION
SA2 STANDBY
+5V2
1 1
2 2
Prot-OVV
CONTROL
3 3
PROT_AUDIOSUPPLY
7505/7509/7560
5504 5505
1 1
2 2
1
2
N.C.
3
4
EN 24
HOT
4
BIAS SUPPLY
3
3000 6025 6024
5017 5010
400V_HOT
2003
7005
STP15NK50
5001
7007
HIGH
15
6
SIDE
VCC
DRIVE
7
5012
14 4
OA
12 2
7006
OB
STP15NK50
7008
10
FI
LOW
10
SIDE
DRIVE
9
PRINTED
COMPONENT
HOT
SA2
SA1
COLD
HOT
5500
5110
6
5
7100
7101 5104 7
3
7105
8
2
7102
STP15NK50
1
10
3104
CONTROL
3V MAX
3150
1V MAX STBY
3127 3128
4 1
7501
TCET1102
3 2
3100
3158
6150 6151 3155 3156
PROT-OVV
1 4
7150
TCET1102
2 3
HOT COLD
COLD
3057
1
7002
TCET1102
2
7003
3031 DC_PROT
5011
6019
STPS20L40CFP
6019
STPS20L40CFP
+12V
2020
2029
5025 +24Va
6021 2022
6041
2045
5026
7010
TS2431
5002
VS Voltage
Adj.
2042 +24Vb
5021
6031
6040
5022 2049
1M02
DC_PROT
1007 2009 VSND_POS
5020
T5A
6029
5018 GND_SND
6030
2021 5019
VSND_NEG
COLD
7507
7506
7512
STANDBY
7511
6504 3509
VTUN
RES
6140
+11V
2141
+12V
+8V6
7131
6107
RES
2513
5103 5506 +5V2
2512
3124 6122 3113
STANDBY
STANDBY: LOW = ON
HIGH = STBY
7531
OVERVOLTAGE
PROTECTION
+5V_SW
CONNECTIONS
SA1
1316
1
2
3 TO
DISPLAY
4
5
1317
1
2
+12V_A
4 4 3 TO
DISPLAY
3 3 4
2 2 5
+12V_+24V
1 1
1319
1
2
3 TO
DISPLAY
4
5
TO 1301
B01B K3
1M10
IBO ZAPPER
1
(ONLY DVB SETS)
2
TO 1329
B01B D
SIDE AV
7
6
5
TO 1M02
4 SA3
3
AUDIO
2
1
1M03 TO 1M03
(1J00)
STANDBY 7
SA2
B01B B16
4
SSB
1M46
11
9
TO 1M46
4
(1J01)
B01B B16
1
SSB
2
7
G_16210_060.eps
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