Zenith XBV613 Service Manual - Page 30

Block Diagrams

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BLOCK DIAGRAMS 1. POWER(SMPS) BLOCK DIAGRAM BD101 T101 ! TRANS + C103 SNUBBER BLOCK (D101,C105 C106,R104) 6 78 RECTIFIER & SMOOTING BLOCK (D124,C124,C134, R133,L124,C126) NOISE FILTER BLOCK (C101,L102, C102) ! FUSE RESISTOR (FR101) ! Y-CAP C110 BR BL (BK)(WH) DRIVE & S/W BLOCK (IC101, D102, R105, C104, C108 , C109, 5 C107,ZD102) 2 1 3 RECTIFIER & SMOOTING BLOCK (D123,C127,C137, L127) RECTIFIER & SMOOTING BLOCK (D121,C126,R136) RECTIFIER & SMOOTING BLOCK (D122,D125,C128, L128,C138) ! Y-CAP C111 PHOTO COUPLER (IC102) ! ERROR AMP (IC103) FEED-BACK BLOCK (R141,R142, C143,R143. R144.R145 R146) 12V REG BLOCK (Q166,ZD151,C160, R166,C159) 9V REG BLOCK (Q164,ZD152,C161, R168,C166) MOTOR VCC 14VA REG12V REG9V 8V REG BLOCK (D126,IC141,R167, 8V C165) 3.8V REG BLOCK (IC131,C158,R165) 3.8V 33V S/W BLOCK (Q161,R154,R155 Q173,R174,R177) 5V S/W BLOCK (Q165,C164,R172, R174) 5VT S/W BLOCK (Q163,C162,D127, R156,R157) PWR CTL BLOCK (Q162,C161,R164, R163) 33V 5.3VA 5.0V M5V/5VT PWR CTL'H' 3-19 3-20

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3-19
3-20
BLOCK DIAGRAMS
1. POWER(SMPS) BLOCK DIAGRAM
BD101
T101
TRANS
+
BR
BL
(BK)(WH)
C103
!
!
!
!
!
FUSE
RESISTOR
(FR101)
NOISE FILTER
BLOCK
(C101,L102,
C102)
PHOTO COUPLER
(IC102)
ERROR
AMP
(IC103)
SNUBBER
BLOCK
(D101,C105
C106,R104)
DRIVE & S/W BLOCK
(IC101, D102, R105,
C104, C108 , C109,
C107,ZD102)
Y-CAP
C111
Y-CAP
C110
FEED-BACK
BLOCK
(R141,R142,
C143,R143.
R144.R145
R146)
RECTIFIER &
SMOOTING BLOCK
(D124,C124,C134,
R133,L124,C126)
RECTIFIER &
SMOOTING BLOCK
(D123,C127,C137,
L127)
RECTIFIER &
SMOOTING BLOCK
(D121,C126,R136)
RECTIFIER &
SMOOTING BLOCK
(D122,D125,C128,
L128,C138)
MOTOR VCC
14VA
REG12V
8V
3.8V
5.3VA
M5V/5VT
33V
12V REG BLOCK
(Q166,ZD151,C160,
R166,C159)
8V REG BLOCK
(D126,IC141,R167,
C165)
5VT S/W BLOCK
(Q163,C162,D127,
R156,R157)
3.8V REG BLOCK
(IC131,C158,R165)
33V S/W BLOCK
(Q161,R154,R155
Q173,R174,R177)
5V S/W BLOCK
(Q165,C164,R172,
R174)
PWR CTL'H'
5.0V
9V REG BLOCK
(Q164,ZD152,C161,
R168,C166)
REG9V
PWR CTL BLOCK
(Q162,C161,R164,
R163)
6
5
7
8
2
3
1