-12-
BLOCK DIAGRAM -1/6 (POWER SECTION)
T
O
SYS
-19VG,-24VG, -29VG
5.4V
A
T
O
SYS/HiFi
HOT
CIRCUIT
BD101
R101
C103
C1
13
C1
12
HOT
GND
F101
WH
(BL)
BK
(BR)
PW101
4
7
8
9
6
5
10
2
1
4
3
11
12
13
1
2
IC102
IC103
3
T101
TRANSFORMER
4
2
3
1
RECTIFIER
& SMOOTHING
+
TO
S
Y
S
T
O
TU/IF
13V
A
33V
TO
HIFI/SCAR
T
12VT
12V(DRUM)
T
O
SYS
12VT(L/D)
T
O
SYS
5.2VT
T
O
A
V
,
TU/IF
,
SYS
5.2V
TO
Hi-Fi, SYS,A
V
TIMER "H"
D154
D155
D157
D158
D159
D160
SNUBBER
BLOCK
(D102,R104,
C105,C106)
(D109, C120,
L104,C121)
FLD Drive
(F102, D107, C1
18,
ZD104, C155, D108,
FR01,C1
19,L105)
NOTES :
Symbol denotes AC ground.
Symbol denotes DC chassis ground.
FROM -COM
5.2VG
TO
System
FROM -COM
PWR.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, R161)
FEED-BACK
BLOCK
(R1
16,R1
17,R1
1
8
R1
19,R120,R121
C1
14,D190)
DECODER
OPT
(Q167,R125,
R190,R191)
F.
-com
ST
ANDBY
"H"
Switching
(Q153, Q156,
R164,R165)
RECTIFIER
& SMOOTHING
(D106, C1
16,
L103,C1
17)
5VG S/W
BLOCK
(Q166, R172,
R173)
S/W BLOCK &
OVER CURRENT
LIMIT
BLOCK
(IC101,C109,D103,R103,
R109,R126,C135,R127,
D104,C127)
AC INPUT
12VT
REG.
BLOCK
(Q155,R105, R159,
C153,ZD151,C151)
SW
(Q164,
Q156)
R107
R102
(Q157,
R170)
SW
