Sony STS-5 Service manual
ST-S5
SERVICE MANUAL
Ver 1.0 2001.04
ST-S5 is the tuner section
in MHC-S7AV.
SPECIFICATIONS
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range 87.5 – 108.0 MHz
Antenna FM lead antenna
Antenna terminals 75 ohm unbalanced
Intermediate frequency 10.7 MHz
AEP Model
UK Model
E Model
Australian Model
AM tuner section
Tuning range
AEP, UK models:
Other models: 531 – 1,602 kHz
Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz
Dimensions (w/h/d)
Mass
Design and specifications are subject to change
without notice.
531 – 1,602 kHz
(with the interval set at
9 kHz)
(with the interval set at
9 kHz)
530 – 1,710 kHz
(with the interval set at
10 kHz)
Approx. 280 x 108 x 340 mm
Approx. 2.1 kg
FM STEREO/FM-AM
9-873-832-11 Sony Corporation
2001D0500-1 Home Audio Company
C 2001.4 Shinagawa Tec Service Manual Production Group
SUPERHETERODYNE TUNER
ST-S5
TABLE OF CONTENTS
1. SERVICING NOTES ................................................ 3
2. GENERAL
Location of Controls ....................................................... 4
Setting the Time .............................................................. 5
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 6
3-2. Cover ............................................................................... 7
3-3. Front Panel Section ......................................................... 7
3-4. PANEL Board, SIRCS Board ......................................... 8
3-5. Tuner pack (FM/AM)...................................................... 8
3-6. MAIN Board ................................................................... 9
3-7. DSP Board....................................................................... 9
4. TEST MODE.............................................................. 10
5. DIAGRAMS
5-1. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 11
5-2. Schematic Diagram – MAIN Board (1/2) – .................. 12
5-3. Schematic Diagram – MAIN Board (2/2) – .................. 13
5-4. Printed Wiring Board – MAIN Board – ........................ 14
5-5. Printed Wiring Board – DSP Board –............................ 15
5-6. Schematic Diagram – DSP Board (1/2) – ..................... 16
5-7. Schematic Diagram – DSP Board (2/2) – ..................... 17
5-8. Printed Wiring Boards – PANEL Section – .................. 18
5-9. Schematic Diagram – PANEL Section – ....................... 19
5-10. IC Pin Function Description ........................................... 21
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED
LINE WITH MARK 0 ON THE SCHEMATIC DIA GRAMS
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 PUBLISHED BY SONY.
6. EXPLODED VIEWS
6-1. Cover, Front Panel Section ............................................. 28
6-2. Chassis Section ............................................................... 29
7. ELECTRICAL PARTS LIST ............................... 30
2
SECTION 1
PART No.
SERVICING NOTES
ST-S5
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:
AC IN
TA
POWER SUPPLY
ST
SYSTEM & CD µcon
DISPLAY
• MODEL IDENTIFICATION
– Rear Panel –
MODEL PART No.
AEP and UK models 4-232-327-0
Australian model 4-232-327-1[]
Mexican model 4-232-327-4
Korean model 4-232-327-9
[]
[]
[]
CDP
TC
TC µcon
3
ST-S5
LOCATION OF CONTROLS
– Front Panel –
SECTION 2
GENERAL
This section is extracted from
instruction manual.
– Rear Panel –
2
3
qh qj
1
4 5 6 7
8
qk
ql
–
–
09qa
w;
+
+
wawswdwfwgwh
CLOCK/TIMER wg (13, 21, 29)
DISPLAY qh (13, 16, 18, 29, 35)
ENTER w; (17, 18)
IR receptor wh
PRESET +/– ws (17, 18)
PTY (AEP, UK models only)
STEREO/MONO qj (17)
TIMER SELECT wf (22, 30)
TUNER/BAND wd (17)
TUNER MEMORY qk (17)
TUNING +/– ql
1 ANTENNA terminal
2 SYSTEM CONTROL 1 connector (TO TA-S7AV)
3 SYSTEM CONTROL 2 connector (TO TA-S7AV)
4 SYSTEM CONTROL 3 connector (FROM CDP-S3)
5 OPTICAL IN terminal
6 OPTICAL IN terminal (FROM CDP-S3)
7 SYSTEM CONTROL 4 connector (TO TC-S3)
8 OPTICAL OUT terminal
9 SUB WOOFER OUT jack
0 MD IN/OUT jack
qa VIDEO (AUDIO) IN jack
(17)
wa
(18)
4
Setting the time
1
Turn on the system.
2
Press CLOCK/TIMER (or CLOCK/TIMER
SET on the remote).
When you set the time for the first time,
proceed to step 5.
3
Press O or o repeatedly to select
“CLOCK SET”.
4
Press ENTER (A/V amplifier or remote).
5
Press O or o repeatedly to set the hour.
6
Press ENTER (A/V amplifier or remote).
7
Press O or o repeatedly to set the
minutes.
8
Press ENTER (A/V amplifier or remote).
Tip
If you have made a mistake or want to change the
time, start over from step 2.
Note
The clock settings are canceled when you disconnect
the power cord or if a power failure occurs.
Remote Control
123
ST-S5
es
ea
e;
wl
wk
wj
wh
wg
wf
wd
ws
wa
w;
ql
qk
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, 26–30)
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)
TA P E A hH ea (19, 35)
TA P E B hH e; (19, 20, 35)
H
hH
hH
.
>
x
Mm
X
O
Pp
o
4
5
6
7
8
9
q;
qa
qs
qd
qf
qg
qh
qj
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
5
ST-S5
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SET
3-2. COVER
(Page 7)
SECTION 3
DISASSEMBLY
3-3. FRONT PANEL SECTION
(Page 7)
3-4. PANEL BOARD,
SIRCS BOARD
(Page 8)
3-5. TUNER PACK (FM/AM)
(Page 8)
3-6. MAIN BOARD
(Page 9)
3-7. DSP BOARD
(Page 9)
6
Note: Follow the disassembly procedure in the numerical order given.
)
3-2. COVER
3
cover
2
two screws
(case 3 TP2)
1
screw
(+BVTT3
×
6 (S))
ST-S5
3-3. FRONT PANEL SECTION
3
two claws
4
front panel section
2
1
wire (flat type) (19 core)
(CN502)
two screws
(case 3 TP2
2
three screws
(BVTP3
3
two claws
3
claw
×
8)
7
ST-S5
3-4. PANEL BOARD, SIRCS BOARD
6
SIRCS board
5
two claws
2
two screws
(BVTP2.6
×
8)
4
PANEL board
2
four screws
(BVTP2.6
1
wire (flat type) (19 core)
(CN602)
×
8)
2
screw
(BVTP2.6
(AEP, UK models)
×
8)
3-5. TUNER PACK (FM/AM)
1
wire (flat type) (11 core)
(Korean, Mexican and Australian models)
wire (flat type) (15 core)
(AEP, UK models)
(CN506)
3
two claws
3
tuner pack (FM/AM)
2
two screws
(BVTP3 × 8)
8
r
3-6. MAIN BOARD
4
1
wire (flat type) (19 core)
(CN502)
screw
(BVTP3
1
wire (flat type) (21 core)
(CN509)
6
MAIN board
×
8)
1
wire (flat type) (23 core)
(CN508)
2
five connectors
(CN510, 5031, 5032, 5041, 5042)
4
two screws
(BVTP3 × 8)
3
three screws
(BVTP3 × 8)
ST-S5
5
PC board holder
3-7. DSP BOARD
1
1
wire (flat type) (23 core)
(CN603)
6
DSP board
wire (flat type) (21 core)
(CN602)
2
connector
(CN601)
4
three screws
(BVTP3 × 8)
3
three screws
(BVTP3
×
8)
2
connector
(CN601)
5
PC board holde
9
ST-S5
SECTION 4
TEST MODE
Note: Use flowing buttons in the test mode.
no mark: Button of tuner unit (ST-S5)
1
*
: Button of amplifier unit (TA-S7AV)
2
*
: Button of CD unit (CDP-S3)
[MC Cold Reset]
• The cold reset clears all data including preset data stored in the
RAM to initial conditions. Execute this mode when returning
the set to the customer.
Procedure 1:
1. Press the ?/1 *1 button to turn the power ON.
2. While pressing the [DIGITAL]*1 button, press the
[DISPLAY] button.
3. The set is reset, and becomes standby state.
Procedure 2:
1. Press the ?/1 *1 button to turn the power ON.
2. While pressing the both [PLAY MODE]*2 and x *2 buttons,
press the M *2 button.
3. The set is reset, and becomes standby state.
[MC Hot Reset]
• This mode resets the set with the preset data kept stored in the
memory. The hot reset mode functions same as if the power
cord is plugged in and out.
Procedure 1:
1. Press the ?/1 *1 button to turn the power ON.
2. While pressing the both [STEREO/MONO] and [CINEMA
STUDIO C]*
3. The set is reset, and becomes standby state.
Procedure 2:
1. Press the ?/1 *1 button to turn the power ON.
2. While pressing the both [PLAY MODE]*2 and x *2 buttons,
press the m *2 button.
3. The set is reset, and becomes standby state.
[Change-over the AM Tuning Interval]
(EXCEPT AEP and UK models)
• The AM tuning interval can be changed over 9 kHz or 10 kHz.
Procedure:
1. Press the ?/1 *1 button to turn the power ON.
2. Turn the [FUNCTION] *
the [TUNER/BAND] button to select the BAND “AM”.
3. Press the ?/1 *1 button to turn the power OFF.
4. While pressing the [ENTER] button, press the ?/1 *1 button,
and the display on the fluorescent indicator tube changes to
“AM 9 K STEP” or “AM 10 K STEP”, and thus the tuning
interval is changed over.
1
buttons, press the [TIMER SELECT] button.
1
knob to select “TUNER”, and press
[GC Test Mode]
Enter the GC Test Mode mode
Procedure 1:
1. Press the ?/1 *1 button to turn the power ON.
2. While pressing the both [STEREO/MONO] and [CINEMA
STUDIO C]*
1
buttons, press the [CLOCK/TIMER] button.
3. LEDs and fluorescent indicator tube are all turned on of all
units.
Procedure 2:
1. Press the ?/1 *1 button to turn the power ON.
2. While pressing the both [PLAY MODE]*2 and x *2 buttons,
press the Z (DISC 1)*2 button.
3. LEDs and fluorescent indicator tube are all turned on of all
units.
Version Display Mode
Procedure:
1. Enter the GC test mode.
2. Each time the [TUNER MEMORY] or [DISC 1]*2 button is pressed,
microcomputer or mechanism deck version is displayed of each
unit.
3. Press the [TUNING +] or [DISC 3]*2 button to detail is displayed
the version.
Key Check Mode
Procedure:
1. Enter the GC test mode.
2. Press the [TUNING -- ] or [DISC 2]*2 button to set the key check
mode.
3. In the key check the mode, the fluorescent indicator tube
displays “K 0 J 0 V 0” . Each time a button is pressed, “K”
value increases. However, once a button is pressed, it is no
longer taken into account.
VACS Level Display Mode
Procedure:
1. Enter the GC test mode.
2. Press the
[TUNING +] or [DISC 3]*
2
button to display VACS
level on the fluorescent indicator tube.
Segment Check Mode
Procedure:
1. Enter the GC test mode.
2. Press the [ENTER] or x *2 button to set the segment check
mode.
3. In the segment check the mode. Each [ENTER] or x *
button is pressed, the fluorescent indicator tube displays is
switching variously.
2
[Change-over of VACS ON/OFF]
1. Press the ?/1 *1 button to turn the power ON.
2. While pressing the both [STEREO/MONO] and [CINEMA
STUDIO C]*
1
buttons, press the [CINEMA STUDIO B] button,
and VACS ON/OFF is change over.
10
Releasing the GC Test Mode
• T o release from this mode, press three buttons in the same manner
as entering this mode or disconnect the power cord.
SECTION 5
DIAGRAMS
ST-S5
5-1. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Printed Wiring Board:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side: Parts on the pattern face side seen from
(Conductor Side) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Component Side) the parts face are indicated.
• Indication of transistor.
C
Q
B
B
B
E
Q
CE
These are omitted.
These are omitted.
Q
CE
These are omitted.
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and 1/
specified.
f
•
• 5 : fusible resistor.
• C : panel designation.
Note: The components identified by mark 0 or dotted line
• A : B+ Line.
• B : B– Line.
• Voltages and waveforms are dc with respect to ground
• V oltages are taken with a V OM (Input impedance 10 MΩ).
• Waveforms are taken with a oscilloscope.
• Signal path.
• Abbreviation
: internal component.
with mark 0 are critical for safety.
Replace only with part number specified.
under no-signal (detuned) conditions.
no mark : TUNER (FM/AM)
( ) : CD PLAY
〈〈 〉〉 : AC OFF
Voltage variations may be noted due to normal production tolerances.
Voltage variations may be noted due to normal production tolerances.
F : TUNER (FM/AM)
E : TAPE PLA Y
G : RECORD
J : CD PLAY
c : DIGITAL INPUT
N : MIC INPUT
AUS : Australian model
KR : Korean model
MX : Mexican model
: Impossible to measure
∗
4
• Circuit Boards Location
DSP board
W or less unless otherwise
TUNER PACK
SIRCS board
MAIN board
PANEL board
1111
ST-S5
5-2. SCHEMATIC DIAGRAM – MAIN Board (1/2) –
(1/2)
CN5031
(Page 13)
(Page 13)
SYSTEM CONTROL 4
(TO TC-S3)
(Page 17)
(Page 16)
OPTICAL IN
(FROM CDP-S3)
OPTICAL IN
(CHASSIS)
(Page 16)
M(A)-GND
EVER+5V
D-GND
D+5V
MIC-SIG
MIC-GND
FL-OUT
FRONT-GND
FR-OUT
CENTER-OUT
CENTER-GND
SL-OUT
S-GND
SR-OUT
OPTICAL RECEIVER
VCC
GND
OUT
IC951
TORX178B
OPTICAL RECEIVER
VCC
GND
OUT
IC952
TORX178B
NO507
4P
REC OUT-R
PB-R
TC A-GND
PB-L
REC OUT-L
TUNER L-IN
VCD L-IN
TC L-IN
TC REC L-OUT
A-GND
TC REC R-OUT
TC R-IN
VCD R5-IN
TUNER R-IN
A+10V
MIC-IN
A-GND
FL-OUT
F-GND
FR-OUT
A-GND
LS-OUT
S-GND
RS-OUT
C-GND
C-OUT
LINE-MUTE
DBFB FEEDBACK
D-GND
D-OUT
D-GND
DSP-DECODE
DSP-CS
AMP-DATA
DSP-ACK
AMP-CLK
CODEC-SMUTE
AMP-LAT
DIR-Rx
DIG-Tx
DIR-XSTATE
DSP-Rx
DIR-CS
DIG-CLK
DIR-UNLOCK
D-GND
D+5V
A-GND
A+5V
CN5041
10P
(A-GND)
R952 L951
470
C916
10000p
CN510
CN508
23P
CN509
21P
5P
AA6
AA5
AA4
AA3
AA2
AA1
C955
10000p
R951
470
C957
10000p
220µH
C956
C964
10
10000p
50V
5P
BB1
BB2
BB3
BB4
C977
10
50V
BB3
BB4
BB1
BB2
C978
10 50V
C968
10000p
C970
10000p
DD1
DD2
DD3
DD4
AA6
AA5
AA4
AA2
AA1
AA3
NO901 NO991
3P 3P
+10V REGULATOR
IC903
L955
470µH
C966
10000p
C907
220
10V
DBFB FEEDBACK
D920
10000p
11ES2-NTA2
C902
470
10V
C971
E8
E7
E9
E6
E10
E5
E11
E4
E12
E3
E13
E2
E14
E1
NJM7810FA
IO
G
C905 C904 C952
470
16V
+5V REGULATOR
IC904
µPC7805AHF
IO
G
+7V REGULATOR
IC901
TA78057S
IO
G
Q902
2SC2001-K1K2
+3.3V REGULATOR
R911
220
R912
510
50V
3300
16V
C906
0.1
470
10
10V
D942 R942
D901
D3SBA20
C953
4700
25V
D922
11ES2
D903
11ES2
D904
11ES2
D923
11ES2
C551C918C903
10
50V
R943
0.1
3.3k
D551
1SS133T-72
RESET SIGNAL
GENERATOR
IC551
M51943BSL
IO
G
C941
10
50V
1SS133T 1k
R552R551
10k470
C991
0.1
C992
0.1
R941D941
1k1SS133T
I
+15V REGULATORG
IC991
O
NJM7815FA
1
2
3
4
5
6
7
8
9
AB20
AB21
10
11
(Page 13)
R555
4.7k
12
R554C553
47k0.1
Q551
2SC2603
RESET
SWITCH
D552R553C552
1SS133T47k0.1
13
14
15
16
17
1212
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