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SERVICE MANUAL
AV AMPLIFIER
AEP Model
UK Model
E Model
Australian Model
SPECIFICATIONS
TA-S7AV
Ver 1.0 2001.04
9-873-836-11
Sony Corporation
2001D0500-1
Home Audio Company
C
2001.4
Shinagawa Tec Service Manual Production Group
TA-S7AV is the Amplifier section
in MHC-S7AV.
Amplifier section
European model:
Front Speaker:
DIN power output (rated) 95 + 95 watts
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
120 + 120 watts
(6 ohms at 1 kHz, 10%
THD)
Music power output (reference)
200 + 200 watts
(6 ohms at 1 kHz, 10%
THD)
Center Speaker:
DIN power output (rated) 30 watts
(8 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
40 watts
(8 ohms at 1 kHz, 10%
THD)
Music power output (reference)
75 watts
(8 ohms at 1 kHz, 10%
THD)
Rear Speaker:
DIN power output (rated) 30 + 30 watts
(8 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
40 + 40 watts
(8 ohms at 1 kHz, 10%
THD)
Music power output (reference)
75 + 75 watts
(8 ohms at 1 kHz, 10%
THD)
Other models:
The following measured at AC 120, 220, 240 V,
50/60 Hz
Front Speaker:
DIN power output (rated) 95 + 95 watts
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
120 + 120 watts
(6 ohms at 1 kHz, 10%
THD)
Center Speaker:
DIN power output (rated) 30 watts
(8 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
40 watts
(8 ohms at 1 kHz, 10%
THD)
Rear Speaker:
DIN power output (rated) 30 + 30 watts
(8 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
40 + 40 watts
(8 ohms at 1 kHz, 10%
THD)
Inputs
VIDEO (AUDIO) IN:
voltage 250 mV,
(phono jacks)
impedance 47 kilohms
MD IN:
voltage 450 mV,
(phono jacks)
impedance 47 kilohms
OPTICAL IN:
(Square optical connector jacks, rear panel)
wavelength
700 nm
MIC:
sensitivity 1 mV,
(Except for
impedance 10 kilohms
European model)
(phone jack)
Outputs
MD OUT:
voltage 250 mV
(phono jacks)
impedance 1 kilohms
PHONES:
accepts headphones of
(stereo mini jack)
8 ohms or more
FRONT SPEAKER:
accepts impedance of 6 to
16 ohms
REAR SPEAKER:
accepts impedance of 8 to
16 ohms
CENTER SPEAKER:
accepts impedance of 8 to
16 ohms
SUB WOOFER OUT:
Voltage 1 V,
impedance 1 kilohms
General
Power requirements
European model:
230 V AC, 50/60 Hz
Australian model:
230 ­ 240 V AC,
50/60 Hz
Mexican model:
120 V AC, 60 Hz
Korean model:
220 V AC, 60 Hz
Power consumption
European model:
300 watts
0.6 watts (during Power
Saving Mode)
Other models:
300 watts
Dimensions (w/h/d)
Approx. 280 x 128 x 350 mm
Mass
Approx. 7.7 kg
Design and specifications are subject to change
without notice.


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2
TA-S7AV
TABLE OF CONTENTS
1.
SERVICING NOTES ............................................... 3
2.
GENERAL ................................................................... 4
3.
DISASSEMBLY
3-1. Disassembly Flow ...........................................................
5
3-2. Cover ...............................................................................
6
3-3. Front Panel Section .........................................................
6
3-4. Back Panel (AV) Section ................................................
7
3-5. FRONT AMP Board .......................................................
7
4.
TEST MODE .............................................................. 8
5.
DIAGRAMS
5-1. Note for Printed Wiring Boards
and Schematic Diagrams ................................................ 10
5-2. Printed Wiring Boards ­ FRONT AMP Section ­ ........ 11
5-3. Schematic Diagram ­ FRONT AMP Section (1/2) ­ .... 12
5-4. Schematic Diagram ­ FRONT AMP Section (2/2) ­ .... 13
5-5. IC Pin Function Description ........................................... 14
5-6. Printed Wiring Board
­ SURROUND AMP Section ­ ...................................... 14
5-7. Schematic Diagram
­ SURROUND AMP Section ­ ...................................... 15
5-8. Printed Wiring Boards ­ CONTROL Section ­ ............ 16
5-9. Schematic Diagram ­ CONTROL Section ­ ................. 17
5-10. Printed Wiring Boards ­ POWER Section ­ ................. 18
5-11. Schematic Diagram ­ POWER Section ­ ..................... 19
6.
EXPLODED VIEWS
6-1. Cover Section .................................................................. 20
6-2. Front Panel Section ......................................................... 20
6-3. Chassis Section ............................................................... 21
7.
ELECTRICAL PARTS LIST ............................... 22
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED
LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.


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3
TA-S7AV
SECTION 1
SERVICING NOTES
This set is a component of the MHC-S7AV.
The MHC-S7AV system configuration is as shown below, and
therefore it does not operate normally unless all four components
are connected.
In performing the repair, connect all components with the system
cables.
Note: The precaution to the users is described on the label stuck
on the back panel (CD player) and in the troubleshooting section
in the Operation Manual.
System Configuration:
POWER SUPPLY
AC IN
TA
SYSTEM & CD
µcon
ST
CDP
TC
µcon
TC
DISPLAY
MODEL IDENTIFICATION
­ Back Panel ­
PART No.
Model
PART No.
AEP model
4-232-337-0[]
UK model
4-232-337-3[]
Australian model
4-232-337-5[]
Mexican model
4-232-337-7[]
Korean model
4-232-337-8[]
FRONT AMP BOARD SERVICE POSITION
In checking the FRONT AMP board, prepare jig
(extension cable J-2501-019-A: 1.25 mm Pitch, 25 core, Length
300 mm) (Australian, Mexican and Korean models)
(extension cable J-2501-087-A: 1.25 mm Pitch, 23 core, Length
300 mm) (AEP, UK models)
(Fig A)
Turn over the FRONT AMP board with Heat Sink,
SURROUND AMP board and RELAY board connected.
Remove the back panel
(AV) section.
Remove the fan motor
connector lead wire.
FRONT AMP board
(CN104)
Connect jig (extension
cable J-2501-019-A (Australian,
Mexican and Korean models),
J-2501-087-A (AEP, UK models)
to the FRONT AMP board (CN104)
and PANEL board (CN700).
PANEL board (CN700)
(Fig A)


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4
TA-S7AV
SECTION 2
GENERAL
This section is extracted from
instruction manual.
Parts Identification
The items are arranged in alphabetical order.
Refer to the pages indicated in parentheses ( ) for details.
A
P
o
O
p
B
C
4
3
5
6
2
7
8
9
q;
qa
qs
qd
qf
qg
1
CINEMA STUDIO A­C 3 (24)
DIGITAL 7 (31, 35)
ENTER/O/o/P/p 2 (10, 12,
13, 15, 21, 22, 26­30)
EQ qa (27)
EQ ON/OFF qs (10, 27)
FILE SELECT q; (23, 28)
FUNCTION 6 (10, 14, 15, 20,
21, 31)
MIC jack (Except for European
model) 9 (31)
MIC LEVEL (Except for
European model) 8 (31)
MULTI CHANNEL DECODING
indicator 4 (25)
PHONES jack qg
SET UP qd (10, 12, 26, 28, 29)
SUR qf (25)
VOLUME 5
@/1 (power) 1 (9, 10, 17, 35)
Main unit
x
hH
H
hH
O
o
Pp
M
m
X
>
.
12 3
wg
qh
qa
wk
wj
wh
wa
4
5
6
7
qs
qf
qd
qg
8
9
q;
qk
ql
w;
qj
wd
ws
wf
es
ea
e;
wl
Remote Control
CD H es (14, 15)
CHECK 5 (15)
CLEAR 6 (15)
CLOCK/TIMER SELECT qj
(30)
CLOCK/TIMER SET qk (13, 21,
29)
DBFB qg (23)
DISPLAY ws (13, 16, 18, 29, 35)
D.SKIP 4 (14)
ENTER wg (10, 12, 13, 15, 17,
18, 21, 22, 26­30)
EQ qd (27)
EQ ON/OFF qf (10, 28)
FUNCTION wf (10, 14, 15, 20,
21, 31)
GROOVE wa (23)
SET UP qs (10, 12, 26, 28, 29)
SLEEP 7 (29)
SUR wd (25)
TAPE A hH ea (19, 35)
TAPE B hH e; (19, 20, 35)
TUNER/BAND wl (17)
TUNING + 9 (17)
TUNING ­ wh (17)
TV CH +/­ ql
TV VOL +/­ w;
TV @/1 2
TV/VIDEO 1
VOL +/­ qh
BUTTON DESCRIPTIONS
@/1 (power) 3
X (pause) q;
x (stop) 8
. (go back) wk
> (go forward) wj
m (rewind) wh
M (fast forward) 9
O
/o/P/p qa


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5
TA-S7AV
· This set can be disassembled in the order shown below.
3-1.
DISASSEMBLY FLOW
SECTION 3
DISASSEMBLY
3-2. COVER
(Page 6)
3-3. FRONT PANEL SECTION
(Page 6)
3-4. BACK PANEL (AV) SECTION
(Page 7)
3-5. FRONT AMP BOARD
(Page 7)
SET
Note 1: The process described in
can be performed in any order.
Note 2: Without completing the process described in
, the next process can not be performed.