Sony TAF-448-EB Service manual
TA-F448EB
SERVICE MANUAL
SPECIFICATIONS
Amplifier section
DIN power output
85 W + 85 W (4 ohms at 1 kHz)
55 W + 55 W (8 ohms at 1 kHz)
Total harmonic distortion
Less than 0.008% (at 10 W output)
Frequency response
PHONO (20 Hz – 20 kHz): RIAA equalization curve ±0.5 dB
TUNER, CD, AUX, TAPE1/DAT, TAPE2/MD: 7 Hz – 100 kHz dB
+11
–3
AEP Model
UK Model
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
S/N (network A)
PHONO: 94 dB
TUNER, CD, AUX, TAPE1/DAT, TAPE2/MD: 105 dB
Output voltage/impedance
RECOUT: 150 mV, 1 kilohm
PHONES: 10 mW (at 8 ohms)
Speakers impedance
4 – 16 ohms, 8 – 16 ohms (SPEAKERS A + B)
Damping factor
100 (8 ohms, 1 kHz)
Dimensions (approx.) (w/h/d)
430 × 135 × 365 mm
incl. projecting parts and controls
Mass (approx.)
6.8 kg
Design and specifications are subject to change without notice.
INTEGRATED STEREO AMPLIFIER
MICROFILM
TABLE OF CONTENTS
1. GENERAL
................................................................... 3
2. DISASSEMBLY.......................................................... 5
3. ELECTRICAL ADJUSTMENTS ......................... 7
4. DIAGRAMS................................................................. 8
4-1. Printed Wiring Boards ..................................................... 10
4-2. Schematic Diagram ......................................................... 15
5. EXPLODED VIEWS ................................................. 19
6. ELECTRICAL PARTS LIST................................ 22
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK ! OR DOTTED
LINE WITH MARK ! ON THE SCHEMA TIC 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 –
SECTION 1
GENERAL
This section is extracted
from instruction manual.
– 3 –
– 4 –
SECTION 2
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
CASE ASS'Y
1
two screws
(case 3 TP2)
3
two screws
(case 3 TP2)
4
case ass'y
2
three screws
(case 3 TP2)
FRONT PANEL SECTION
8
screw
(BVTP2.6
2
×
8)
connector
(CN701)
7
two screws
(3
×
8)
3
connector
(CN405)
4
connector
(CN809)
5
connector
(CN104)
3
two screws
(case 3 TP2)
6
five screws
(3
×
8)
9
front panel section
– 5 –
1
connector
(CN201)
8
screw
(BVTP3
×
8)
INPUT BAORD, MAIN (B) BAORD
9
Break the soldering of
three power transformer
leads.
!º
three screws
(3
×
!¡
four screws (H)
!¢
heat sink
8)
8
connector
(CN405)
7
two connectors
(CN403A, 404A)
!¡
four screws (H)
!£
two screws
(transistor)
!¢
A
heat sink
2
connector
(CN104)
4
Remove the INPUT board
to direction of the arrow
5
two connectors
(CN16, 103)
3
three screws
(3
×
8)
A
.
MAIN (A) BOARD
!£
two screws
(transistor)
!™
MAIN (B) board
2
five screws
!º
screw
(3
×
8)
1
two connectors
(CN301, 302)
6
two connectors
(CN401, 402)
3
MAIN (A) board
– 6 –
1
connector
(CN201)
Loading...