TA-FB930R
SERVICE MANUAL
Photo: BLACK model
SPECIFICATIONS
AEP Model
MICROFILM
INTEGRATED STEREO AMPLIFIER
1
TABLE OF CONTENTS
1. GENERAL .......................................................................... 3
2. ELECTRICAL ADJUSTMENT ..................................... 4
3. DIAGRAMS
3-1. Circuit Boards Location........................................................5
3-2. Schematic Diagram – Input Section – .................................. 6
3-3. Printed Wiring Board – Input Section – ................................ 7
3-4. Schematic Diagram – Main Section – .................................. 8
3-5. Printed Wiring Board – Main Section – ................................ 9
3-6. Schematic Diagram – Panel Section –................................ 10
3-7. Printed Wiring Board – Panel Section – ............................. 11
3-8. Schematic Diagram – Power Section –...............................12
3-9. Printed Wiring Board – Power Section – ............................ 13
3-10. IC Block Diagrams............................................................ 14
3-11. IC Pin Function .................................................................14
4. EXPLODED VIEW
4-1. Case Section........................................................................15
4-2. Front Panel Section............................................................. 16
4-3. Chassis Section ................................................................... 17
5. ELECTRICAL PARTS LIST ........................................ 18
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY MARK ! OR DO TTED LINE
WITH MARK ! 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 PUBLISHED BY SONY.
2
Front Panel Descriptions
2
22
21
20
SECTION 1
GENERAL
78
3
4
6 5 11 0
18 19
17
16
9
15
14
11
12
13
1 PROTECTION indicator
2 U (Power) button
3 Remote sensor
4 EON LINK indicator
5 TAPE 1/DAT indicator
6 TAPE 2/MD indicator
7 AUX indicator
8 CD indicator
9 TUNER indicator
10 PHONO indicator
11 INPUT SELECTOR knob
12 VOLUME knob
13 SOURCE DIRECT button and indicator
14 TAPE MONITOR knob
15 SUBSONIC button
16 LOUDNESS button
17 BALANCE knob
18 TREBLE knob
19 BASS knob
20 SPEAKERS knob
21 PHONE jack
22 EON LINK button
This section is extracted from
instruction manual.
3
SECTION 2
ELECTRICAL ADJUSTMENT
Bias Adjustment
NOTE:
1. Perform the adjustment after the unit has warmed up sufficiently .
2. Perform the bias adjustment if the power transistor has been
replaced.
Procedure:
1. Rotate fully the bias adjusting semi-fixed resistors (RV500,
RV600) to the MIN position (counterclockwise).
2. Connect a digital voltmeter to the CN500 and CN600.
1 pin 3 pin
CN500 (L-CH)
CN600(R-CH)
+
+
3. Set the slide regulator to 0V, and press the U button (ON) on
the set.
4. Raise gradually the slide regulator voltage up to the rated voltage.
5. At this time, confirm that the SP relay is turned on (it will click).
6. Adjust the RV500 and RV600 so that a reading of digital
voltmeter is 10 ± 1 mV.
7. Return the slidack to 0 V, and press the U button (OFF) on the
set.
–
–
Adjustment Location :
[MAIN BOARD] – COMPONENT SIDE –
1
3
CN500 (L-CH)
RV500
Bias (L-CH)
RV600
Bias (R-CH)
CN600 (R-CH)
1
3
+
DIGITAL
VOLTMETER
+
DIGITAL
VOLTMETER
4
SECTION 3
DIAGRAMS
3-1. CIRCUIT BOARDS LOCATION
SIRCS board
SIRCS SUB board
HP board
TONE board
PANEL board
S-D LED board
PS board
OUTLET board
SP-TM board
VOL board
MAIN board
PHONO board
INPUT board
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
For schematic diagrams.
Note:
• 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.
¢
•
• 2 : nonflammable resistor.
• 5 : fusible resistor.
• C : panel designation.
Note: The components identified by mark ! or dotted line
• U : B+ Line.
• V : B– Line.
• H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground
• Voltages are tak en with a V OM (Input impedance 10 MΩ).
• Waveforms are taken with a oscilloscope.
• Circled numbers refer to waveforms.
• Signal path.
• Abbreviation
: internal component.
with mark ! are critical for safety.
Replace only with part number specified.
under no-signal (detuned) conditions.
no mark : POWER ON
Voltage variations may be noted due to normal production tolerances.
Voltage variations may be noted due to normal production tolerances.
F : TUNER
G : German model.
EE : East European model.
AUS : Australian model.
SP : Singapore model.
MY : Malaysia model.
4
W or less unless otherwise
WAVEFORM
1
3.8Vp-p
4MHz
IC902 1 XOUT
For printed wiring boards.
Note:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• b : Pattern from the side which enables seeing.
• Indication of transistor
C
E B
These are omitted
55
TA-FB930R
3-2. SCHEMATIC DIAGRAM – INPUT SECTION –
(Page 8)
(Page 10)
(Page 10)
66
3-3. PRINTED WIRING BOARD – INPUT SECTION –
(Page 11)
(Page 11)
(Page 9)
• See page 5 for Circuit Boards Location.
TA-FB930R
• Semiconductor
Location
Ref. No. Location
D100 A-8
D101 A-10
D102 B-10
D103 B-10
D104 C-10
D105 D-10
D106 D-10
D107 B-8
D108 B-6
D140 B-4
D240 B-4
Q100 B-7
Q101 B-7
Q102 B-7
Q103 B-7
Q104 B-6
Q105 B-6
Q140 C-4
Q240 B-4
77
TA-FB930R
3-4. SCHEMATIC DIAGRAM – MAIN SECTION –
• See page 14 for IC Block Diagrams.
(Page 10)
(Page 10)
(Page
12)
(Page 12)
(Page
88
10)
(Page 6)