Circuit Diagrams; Smps - Power Circuit Diagram - LG BP340 Service Manual

CIRCUIT DIAGRAMS

1. SMPS - POWER CIRCUIT DIAGRAM

12
11
10
D503 D503 D501 D501
9
+ +
CE501 CE501
CY501 CY501 10uF/400V 10uF/400V
NC 100pF/250VAC NC 100pF/250VAC
8
D504 D504 D502 D502
7
F501 F501
10ohm/2W 10ohm/2W
6
5
4
CN501 CN501
2PIN/7.92mm 2PIN/7.92mm
3
2
Warning
1
Parts that are shaded are critical with
respect to risk of fire or electrical shock.
A B C D
L502 L502
NC 680uH 10% NC 680uH 10%
LF501 LF501
+ +
CE502 CE502
30mH 30mH
15uF/400V 15uF/400V
U501 TNY176DG U501 TNY176DG
5
S Drain
FB501 FB501
NC
NC FB80@100MHz NC FB80@100MHz 6
S
BP/M
7
S
8
S EN/UV
Alternative & Selective
AC Input:110-240Vac
CE501/CE502:22uF/400V
AC Input:220-240Vac
CE501/CE502:15uF/400V
AC Input:100-120Vac
CE501/CE502:22uF/250V
India:
CE501/CE502::22uF/450V
E F G H
IMPORTANT SAFETY
WHEN SERVICING THIS CHASSIS, UNDER NO
CIRCUMSTANCES SHOULD
DESIGN BE MODIFIED OR ALTERED WITHOUT
PERMISSION FROM THE LG CORPORATION. ALL
COMPONENTS SHOULD BE REPLACED ONLY WITH
TYPES IDENTICAL TO THOSE IN THE ORIGINAL
CIRCUIT. SPECIAL COMPONENTS ARE SHADED
CY502 CY502
1000pF/250VAC 1000pF/250VAC
C501 C501
R503 R503 R502 R502 1500pF/1KV 1500pF/1KV
150K 150K 150K 150K
7
R501 R501
22 22
T501 T501
D505 D505
FR107/1A/1000V FR107/1A/1000V
3
4
3
2 1
+ +
1 CE506 CE506
10uF/50V 10uF/50V
5
EE19 EE19
R504 R504 ZD501 ZD501
C505 C505
100K 100K 2200pF/50V/X7R 2200pF/50V/X7R BZX79C9V1 BZX79C9V1
I J K L M
3-13 3-14
ON THE SCHEMATIC FOR EASY IDENTIFICATION.
THE ORIGINAL THIS CIRCUIT DIAGRAM MAY OCCASIONALLY
DIFFER FROM THE ACTUAL CIRCUIT USED. THIS
WAY, IMPLEMENTATION OF THE LATEST SAFETY
AND PERFORMANCE IMPROVEMENT CHANGES
INTO THE SET IS NOT DELAYED UNTIL THE NEW
SERVICE LITERATURE IS PRINTED.
C504 C504
1000pF/1KV 1000pF/1KV R505 R505
22 22
D550 D550
L501 L501
10
3.3uH/3A 3.3uH/3A
SR2100/2A/100V SR2100/2A/100V
9
+ +
CE507 CE507
1000uF/16V 1000uF/16V
R506 R506
200 200
R507 R507
2.2K 2.2K
U502 U502
LTV-817S-B LTV-817S-B
ZD504 ZD504
BZX79C11 BZX79C11
R9 R9
0 0
N O P Q
NOTE :
1. Shaded( ) parts are critical for safety. Replace only
with specified part number.
2. Voltages are DC-measured with a digital voltmeter
during Play mode.
+12V
+ +
CE508 CE508
470uF/16V 470uF/16V
R S T