LG LST-4200A Service Manual - Page 49

Power Block Diagram

Get LG LST-4200A PDF manuals and user guides View all LG LST-4200A manuals
Add to My Manuals
Save this manual to your list of manuals

Page 49 highlights

4. POWER BLOCK DIAGRAM BD101 R105 + C103 NOISE FILTER BLOCK (C101,L101, C102) ! FUSE (F101) ! BR BL (BK)(WH) ! Y-CAP C113 ! Y-CAP C112 SNUBBER BLOCK (D102,C105 C106,R104) ! T101 TRANS 1 15 14 13 3 12 DRIVE & S/W BLOCK (IC101, D103, R103, 11 C111, C109 , R101, R102,R106,BC101) 5 10 RECTIFIER & SMOOTING BLOCK (D107,C126) RECTIFIER & SMOOTING BLOCK (D108,C124,L106,C125) RECTIFIER & SMOOTING BLOCK (D110,C122) RECTIFIER & SMOOTING BLOCK (D109,C120) 9 RECTIFIER & SMOOTING BLOCK 8 (D105,C118, L104,C119) 9V REG & S/W BLOCK (IC154,C154,R154) 12V REG & S/W BLOCK (IC155,C155,R151) 3.3V REG & S/W BLOCK (IC153,C153,R152) RECTIFIER & SMOOTING BLOCK 6 7 (D106,C116, L103,C117) PHOTO COUPLER (IC102) ! ERROR AMP (IC103) FEED-BACK BLOCK R116,R117, C114,R118. R119.R120 R121) 5.0VA REG BLOCK (IC156,C156) 5.0V REG & S/W BLOCK (IC152,C152,R153) TO Main (P101) P. CTL 'H' 30VA 12VA 9VA 5V 5VA 3.3V -29VA FD(-) FD(+) 3-43 3-44

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
3-43
3-44
4. POWER BLOCK DIAGRAM
PHOTO COUPLER
(IC102)
T101
TRANS
RECTIFIER &
SMOOTING BLOCK
(D107,C126)
P. CTL 'H'
30VA
9VA
ERROR
AMP
(IC103
)
13
12
10
7
11
14
15
FEED-BACK
BLOCK
R116,R117,
C114,R118.
R119.R120
R121
)
RECTIFIER &
SMOOTING BLOCK
(D108,C124,L106,C125)
RECTIFIER &
SMOOTING BLOCK
(D110,C122)
RECTIFIER &
SMOOTING BLOCK
(D105,C118,
L104,C119)
RECTIFIER &
SMOOTING BLOCK
(D109,C120)
RECTIFIER &
SMOOTING BLOCK
(D106,C116,
L103,C117)
5V
5VA
TO Main
(P101)
8
9
9V REG & S/W
BLOCK
(IC154,C154,R154)
12V REG & S/W
BLOCK
(IC155,C155,R151)
3.3V REG & S/W
BLOCK
(IC153,C153,R152
)
5.0VA REG
BLOCK
(IC156,C156)
5.0V REG & S/W
BLOCK
(IC152,C152,R153
)
FD(+)
FD(-)
-
29VA
FUSE
(F101)
NOISE FILTER
BLOCK
(C101,L101,
C102)
SNUBBER
BLOCK
(D102,C105
C106,R104)
DRIVE & S/W BLOCK
(IC101, D103, R103,
C111, C109 , R101,
R102,R106,BC101)
BD
101
R105
1
3
5
6
Y-CAP
C113
Y-CAP
C112
+
BR
BL
(BK)(WH)
C
103
!
!
!
!
!
!
3.3
V
12VA