Block Diagram - Sony SA-WFT7 Service Manual

3-2. BLOCK DIAGRAM

PRE AMP
REVERSE
IC501 (1/2)
J701
3 1
INPUT
PHASE AMP
IC503 (2/2)
6
SUB+9V
SIGNAL AMP
IC401
5 7 2 1
S301
POWER
F901
~
AC IN
SA-FT7ED/WFT7/SS-CNF7ED/FRF7ED/WS-FT7
S501
PHASE
VR502
NORMAL
FILTER AMP AMP
LEVEL
IC503 (1/2) IC502 (2/2)
3 PROTECTION
1 5 7
Q502,503
4
FILTER
7
Q501
VR501
BASS BOOST
VOLTAGE
DETECT
Q403
AUTO POWER OFF DETECT
IC402
SIGNAL RELAY/LED
6 7
DETECT DRIVE
Q401,402
Q201-203,206
S401
POWER SAVE
OFF
AUTO
T201
POWER
TRANSFORMER
RECT
SUB+9V
D201-204
D206 AC OFF
DETECT
Q208
+6.2V REG
SUB+9V +6.2V
Q404
+15V REG
+25V +15V
Q505,506,551
-15V REG
-25V -15V
Q507,508,552
DRIVER AMP
IC601
AMP AMP
IC501 (2/2) IC502 (1/2)
5 7 3 1 46
IN L+
50 IN R-
D604
DC VOLTAGE
MUTE
+25V DETECT 55 MUTE
Q602,603,607
Q604-606
36
OVERLOAD
PROTECT
Q204,205,207
GREEN
LD801
ON/STANDBY
RED
RY201
RY202
RY201
RECT
D101
DC-DC CONVERTER
RY202
IC101
18 VD
DC DETECT
2 F/B
PH101
11 11
SA-FT7ED/WFT7/SS-CNF7ED/FRF7ED/WS-FT7
28
GNLS
22
GNL
21 POWER
AMP
GPL 18
Q651-654
17
GPLS
5
GPRS
GPR 4 POWER
AMP
64
GNR
Q671-674
DC
63 OFFSET
GNRS
Q690,692,693
37 57
ON/OFF
16
VG H DRIVE
T101
Q101
DC-DC CONVERTER
TRANSFORMER
ON/OFF
RECT
VG L 12 DRIVE
D151
Q102
OCP 9
8
VCI
D107
• Signal path
: LINE
SP901
SPEAKER
INPEDANCE
DETECT
Q600,689,691
+25V
-25V
D159