Sony TADX-80 Service manual
TA-DX80
SERVICE MANUAL
Ver 1.0 2001.03
TA-DX80 is the amplifier section in
MHC-DX80, MHC-VX888.
SPECIFICATIONS
The following measured at AC 120, 220, 240 V 50/60 Hz
DIN power output (rated) 75 + 75 watts
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
100 + 100 watts
(6 ohms at 1 kHz, 10% THD)
Inputs
MD/VIDEO (AUDIO) IN: voltage 450 mV/250 mV,
(phono jacks) impedance 47 kilohms
MIC: sensitivity 1 mV,
(phone jack) impedance 10 kilohms
Outputs
PHONES: accepts headphones of
(stereo mini jack) 8 ohms or more
FRONT SPEAKER: accepts impedance of 6 to 16 ohms
SURROUND SPEAKER: accepts impedance of 6 ohms
E Model
General
Power requirements
Mexican models: 120 V AC, 60Hz
E91 models: 220 V AC, 50/60 Hz
Other models: 120 V, 220 V or 230 – 240 V AC, 50/60Hz
Power consumption 180 watts
Dimensions (w/h/d) Approx. 150 × 360 × 343 mm
Mass: Approx. 5.5 kg
Design and specifications are subject to change without notice.
• Abbreviation
E91: 220 V AC area in E model
9-929-592-11 Sony Corporation
2001C0500-1 Audio Entertainment Group
C 2001.3 General Engineering Dept.
Adjustable with voltage selector
INTEGRATED STEREO AMPLIFIER
TA-DX80
SECTION 1
SERVICING NOTE
TABLE OF CONTENTS
1. SERVICING NOTE .................................................. 2
2. GENERAL ................................................................... 3
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 4
3-2. Case ................................................................................. 4
3-3. Front Panel Section ......................................................... 5
3-4. MAIN Board ................................................................... 5
4. DIAGRAMS
4-1. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 5
4-2. Printed Wiring Board – MAIN Board – ........................ 6
4-3. Schematic Diagram – MAIN Board – ........................... 7
4-4. Printed Wiring Boards
– INLET/PANEL/TRANS Boards – .............................. 8
4-5. Schematic Diagram
– INLET/PANEL/TRANS Boards – .............................. 9
4. EXPLODED VIEW ................................................... 10
5. ELECTRICAL PARTS LIST ............................... 10
MODEL IDENTIFICATION
– REAR VIEW –
MODEL NO.
T A-DX80
INTEGRATED STEREO AMPLIFIER
Mexican model : AC: 120 V - 60 Hz 180 W
E91 model : AC: 220 V - 50/60 Hz 180 W
Other models : AC: 120/220/230 – 240 V - 50/60 Hz 180W
• Abbreviation
E91: 220 V AC area in E model
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be damaged 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 view –
SECTION 2
GENERAL
1 Indicator
2 LINK/SURROUND/SUB WOOFER indicator
3 SURROUND SPEAKER MODE switch
4 SURROUND SPEAKER LEVEL control
TA-DX80
This section is extracted from
instruction manual.
– Rear view –
1 SYSTEM CONTROL connector
2 SPEAKER terminal
3 VOLTAGE SELECTOR switch
(EXCEPT Mexican and E91 models)
4 - AC IN terminal
1
• Abbreviation
E91: 220 V AC area in E model
2
3
4
3
TA-DX80
s
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
3-2. CASE
(Page 4)
SECTION 3
DISASSEMBLY
3-3. FRONT PANEL
SECTION
(Page 5)
Note: Follow the disassembly procedure in the numerical order given.
3-4. MAIN BOARD
3-2. CASE
1
screw (case3 TP2)
(10 mm)
1
screw (case3 TP2)
(8 mm)
(Page 5)
2
three screw
(BVTP3 × 8)
1
screw (case3 TP2)
(10 mm)
1
screw (case3 TP2)
(8 mm)
2
four screws
(BVTP3 × 8)
3
case
4
y
)
SECTION 4
B
These are omitted.
CE
Q
B
These are omitted.
CE
Q
DIAGRAMS
TA-DX80
3-3. FRONT PANEL SECTION
4
front panel section
1
wire (flat type) (15 core
(CN111)
3
claw
4-1. 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.
• : Pattern from the side which enables seeing.
• Indication of transistor.
• Abbreviation
E91 : 220 V AC area in E model
MX : Mexican model
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.
• 5 : 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.
• A : B+ Line.
• B : B– Line.
• Voltages are dc with respect to ground under no-signal
conditions.
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage var iations may be noted due to normal production tolerances.
no mark : POWER ON
• Signal path.
F : AUDIO
• Abbreviation
BR : Brazilian model
E91 : 220 V AC area in E model
MX : Mexican model
4
W or less unless otherwise
3-4. MAIN BOARD
8
MAIN board
5
3
screw
(BVTP3
two screws
(BVTP3
×
×
10)
10)
1
wire (flat type) (15 core)
(CN111)
2
connector
(CN501)
2
three screws
(BVTP3
×
8)
3
two screws
(BVTP3
7
×
8)
heat sink ass
6
two screws
(BVTP3
×
16)
4
55
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