11
BLOCK DIAGRAM-1 (POWER SECTION)
T
O
SYS
-16VG, -21VG, -27VG
5.4V
A
T
O
SYS/HIFI
HOT
CIRCUIT
BD101
R101
R141,142,143
D141
C103
C1
13
C1
12
HOT
GND
F101
WH
(BL)
BK
(BR)
PW101
6
9
10
11
7
8
12
2
1
4
3
13
14
15
1
2
IC102
IC103
4
T101
TRANSFORMER
4
2
3
1
RECTIFIER
& SMOOTHING
+
T
O
SYS
T
O
TU/IF
24/15/12V
T
O
SYS
13V
A
33V
TO
HIFI/SYS
12V
A
12V(DRUM)
T
O
SYS, DRUM
5.2VT
T
O
A
V
,
TU/IF
,
SYSCON
5.2V
TO
A
V,Hi-Fi,
SYS
TIMER "H"
D151
D152
D153
D154
D155
D158
SNUBBER
BLOCK
Drive Block FET141
R144,R145,D142,ZD142
(D102,R104,
C105,C106)
(D109, C120,
L104,C121)
FLD Drive
(F102, D107, C1
18,
ZD104, C155, D108,
FR01, C1
19)
NOTES :
Symbol denotes AC ground.
Symbol denotes DC chassis ground.
!
!
!
!
!
!
FROM -COM
5.2VG
TO
System
FROM -COM
P
.CTL"H"
LINE FIL
TER
BLOCK
(C101,L102,
C102)
RECTIFIER
& SMOOTHING
(D105, C1
15)
36V S/W
BLOCK
(Q154, R157,
R158,R155)
5VT
SW
BLOCK
(Q152, R153,
R154, D156)
5V S/W
BLOCK
PWR CTL
BLOCK
Q163
(Q151, R151,
R152)
(Q162, C124,
R161)
FEED-BACK
BLOCK
(R1
16,R1
17,R1
18
R1
19,R120,R121
C1
14)
12V
A
REG.
BLOCK
(Q155,R105, R159,
C153,ZD151,C151)
F.
-com
ST
ANDBY
"H"
Switching
Q153, Q156
RECTIFIER
& SMOOTHING
(D106, C1
16,
L103,C1
17)
5VG S/W
BLOCK
(Q166, R172,
R173)
S/W BLOCK &
OVER CURRENT
LIMIT
BLOCK
(IC141,C142,C141,R146,C143,
ZD141,R149,R147,R148)
AC INPUT
!
!
!
!
!
!
D159
D160
Q157
Q164,
Q165
