Sony TA-DX8 Service manual
TA-DX8
SERVICE MANUAL
TA-DX8 is the amplifier section in
MHC-DX8, MHC-VX88.
SPECIFICATIONS
E Model
Australian Model
INTEGRATED STEREO AMPLIFIER
TABLE OF CONTENTS
MODEL IDENTIFICATION
1. GENERAL ................................................................... 3
2. DISASSEMBLY ......................................................... 4
3. DIAGRAMS
3-1. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 5
3-2. Printed Wiring Board – MAIN Board – ........................ 6
3-3. Schematic Diagram – MAIN Board – ........................... 7
3-4. Printed Wiring Boards
– PANEL/PRIMARY/SECONDARY Boards –............. 8
3-5. Schematic Diagram
– PANEL/PRIMARY/SECONDARY Boards –............. 9
4. EXPLODED VIEW ................................................... 10
5. ELECTRICAL PARTS LIST ............................... 10
– REAR VIEW –
MODEL NO.
INTEGRATED STEREO AMPLIFIER
Mexican model : AC: 120V - 60Hz
Australian model: AC: 230 – 240V - 50/60Hz
Other models : AC: 120/220/230 – 240V - 50/60Hz
T A-DX8
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 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
• LOCATION OF CONTROLS
– Front and Top view –
SECTION 1
GENERAL
12 3
1 SATELLITE MODE switch
2 ON/OFF switch
3 SATELLITE LEVEL control
4 Indicator
4
– Rear view –
1 SYSTEM CONTROL connector
2 SPEAKER terminal
3 VOLTAGE SELECTOR switch
(EXCEPT Mexican and Australian models)
1
2
3
3
SECTION 2
)
)
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
COVER
1 two screws
(case3 TP2)
2 two screws
(BVTP3 × 10
2 four screws
(BVTP3 × 10)
3 cover
FRONT PANEL SECTION
4 front panel section
1 two screws
(case3 TP2)
1 wire (flat type) (15 core
(CN111)
3 claw
2 three screws
(BVTP3 × 8)
4
SECTION 3
y
B
These are omitted.
CE
Q
B
These are omitted.
CE
Q
DIAGRAMS
MAIN BOARD
3 screw
5 two screws
(BVTP3 × 8)
(BVTP3 × 8)
1 wire (flat type) (15 core)
(CN111)
2 connector
(CN501)
6 two screws
(BVTP3 × 16)
3 two screws
(BVTP3 × 8)
3-1. 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.
• b : Pattern from the side which enables seeing.
• Indication of transistor.
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.
• 2 : nonflammable resistor.
• 1 : fusible resistor.
• C : panel designation.
Note: The components identified by mark 0 or dotted line
with mark 0 are critical for safety.
Replace only with part number specified.
• U : B+ Line.
• V : B– Line.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production tolerances.
• Signal path.
F : AUDIO
• Abbreviation
AUS : Australian model
IA : Indonesian model
MX : Mexican model
4
W or less unless otherwise
8 MAIN board
7 heat sink ass’
4
55
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