1
AEP Model
UK Model
E Model
Australian Model
SPECIFICATIONS
SERVICE MANUAL
INTEGRATED STEREO AMPLIFIER
TA-FB740R
Amplifier section
DIN power output
100 W + 100 W (4
at 1 kHz)
60 W + 60 W (8
at 1 kHz)
Total harmonic distortion
Less than 0.008% (at 10 W output 1 kHz)
Frequency response
PHONO (20 Hz - 20 kHz): RIAA equalization curve
±0.5 dB
TUNER, SACD/CD, AUX, TAPE1/DAT, TAPE2/MD:
7 Hz - 300 kHz +0
3 dB
S/N (network A)
PHONO
TUNER, SACD/CD, AUX, TAPE1/DAT, TAPE2/MD:
105 dB
90 dB
Output voltage/impedance
REC OUT 1, 2: 150 mV, 1 k
PHONES: 10 mW (at 8
)
Speakers impedance
4 - 16
, 8 - 16 (SPEAKERS A+B)
Damping factor
500 (8
, 1 kHz)
General
System
Power amplifier: Pure-complementary SEPP OCL
power amplifier with all stages directly coupled
Preamplifier: Low-noise, equalizer amplifier
Power requirements
230 V AC, 50/60 Hz
Power consumption
180 W
Dimensions (approx.) (w/h/d)
430
× 150 × 420 mm
incl. projecting parts and controls
Mass (approx.)
8.6 kg
Supplied accessories
· Remote commander (remote) (1) RM-S336
· Sony batteries R6 (size-AA) (2)
Design and specifications are subject to change without
notice.
2
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 PUBLISHED BY SONY.
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
3
Front Panel Descriptions
SECTION 1
GENERAL
This section is extracted from
instruction manual.
Rear Panel Descriptions
SPEAKERS
EON CONTROL
R
B
A
L
++
RL
++
TAPE1/DAT
L
REC OUT
IN
IMPEDANCE USE 416
A+B USE 816
BI WIRE USE 416
IN
R
L
R
TAPE2/MD
REC OUT
IN
AUX
IN
SACD/
CD
IN
TUNER
IN
L
R
PHONO
IN
SIGNAL
GND
U
AC OUTLET
SWITCHED 100W MAX
4
2
3
5
1
0
qa
9
8
7
6
1 PHONO
2
U (SIGNAL GND)
3 SPEAKERS A/B
6 Mains lead
7 TAPE1/DAT
8 TAPE2/MD
4 EON CONTROL IN
5 AC OUTLET
(Except UK, Singapore, Malaysia)
9 AUX
0 SACD/CD
qa TUNER
1 PROTECTION indicator
2 POWER button
3 Remote sensor
4 TAPE 1/DAT indicator
5 TAPE 2/MD indicator
6 AUX indicator
7 CD indicator
8 TUNER indicator
9 PHONO indicator
10 INPUT SELECTOR knob
11 VOLUME knob
12 SUBSONIC button
13 SOURCE indicator
14 SOURCE DIRECT button and indicator
15 LOUDNESS button
16 TAPE MONITOR knob
17 BALANCE knob
18 TREBLE knob
19 BASS knob
20 SPEAKERS knob
21 PHONE jack
22 EON LINK button
23 EON LINK indicator
22
23
13
12
14
15
16
17
18
19
20
21
3
2
1
9
78
46
5
10
11
4
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
2 pin
+
+
CN500 (L-CH)
CN600(R-CH)
3. Set the slide regulator to 0V, and press the POWER 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 7 ± 1 mV.
7. Return the slidack to 0 V, and press the POWER button (OFF)
on the set.
Adjustment Location :
[MAIN BOARD] COMPONENT SIDE
+
CN600
(R-CH)
CN500
(L-CH)
12
21
RV600
Bias (R-CH)
RV500
Bias (L-CH)
DIGITAL
VOLTMETER
DIGITAL
VOLTMETER
+
55
SECTION 3
DIAGRAMS
3-1. CIRCUIT BOARDS LOCATION
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 1/4 W or less unless otherwise
specified.
·
f
: internal component.
· 2 : nonflammable resistor.
· 5 : fusible resistor.
· C : panel designation.
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.
· U : B+ Line.
· V : B Line.
· H : adjustment for repair.
· Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : POWER ON
· Voltages are taken with a VOM (Input impedance 10 M
).
Voltage variations may be noted due to normal produc-
tion tolerances.
· Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
· Circled numbers refer to waveforms.
· Signal path.
F
: TUNER
WAVEFORM
1
IC902 1 XOUT
· Indication of transistor
C
These are omitted
E
B
4MHz
3.8Vp-p
PANEL board
INPUT board
MAIN board
SP-TM board
PHONO board
PS board
OUTLET board
(EXCEPT UK, SP, MY)
VOL board
SIRCS board
SIRCS SUB board
HP board
SP-SW board
· Abbreviation
G
: German model
SP
: Singapore model
MY
: Malaysia model
AUS
: Australian model
EE
: East European model
Note: The components identified by mark 0 or dotted line
with mark 0 are critical for safety.
Replace only with part number specified.