Sony TAFB-930-R Service manual

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
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
65110
1819
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 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
EB
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)
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