Read Sony MHC-VX888 / TA-DX80 Service Manual online
SERVICE MANUAL
INTEGRATED STEREO AMPLIFIER
E Model
SPECIFICATIONS
TA-DX80
Ver 1.0 2001.03
9-929-592-11
Sony Corporation
2001C0500-1
Audio Entertainment Group
C
2001.3
General Engineering Dept.
TA-DX80 is the amplifier section in
MHC-DX80, MHC-VX888.
MHC-DX80, MHC-VX888.
The following measured at AC 120, 220, 240 V 50/60 Hz
DIN power output (rated) 75 + 75 watts
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)
(6 ohms at 1 kHz, 10% THD)
Inputs
MD/VIDEO (AUDIO) IN: voltage 450 mV/250 mV,
(phono jacks)
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:
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
General
Power requirements
Mexican models:
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
Adjustable with voltage selector
Adjustable with voltage selector
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
2
TA-DX80
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
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 PUB-
LISHED BY SONY.
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.
MODEL IDENTIFICATION
– REAR VIEW –
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
MODEL NO.
TA-DX80
INTEGRATED STEREO AMPLIFIER
Mexican model : AC: 120 V - 60 Hz 180 W
E91 model
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
SECTION 1
SERVICING NOTE
3
TA-DX80
SECTION 2
GENERAL
This section is extracted from
instruction manual.
instruction manual.
• LOCATION OF CONTROLS
– Front view –
1 Indicator
2 LINK/SURROUND/SUB WOOFER indicator
3 SURROUND SPEAKER MODE switch
4 SURROUND SPEAKER LEVEL control
1 SYSTEM CONTROL connector
2 SPEAKER terminal
3 VOLTAGE SELECTOR switch
(EXCEPT Mexican and E91 models)
4 - AC IN terminal
• Abbreviation
E91: 220 V AC area in E model
– Rear view –
1
2
3
4
4
TA-DX80
• This set can be disassembled in the order shown below.
3-1.
DISASSEMBLY FLOW
SECTION 3
DISASSEMBLY
Note:
Follow the disassembly procedure in the numerical order given.
3-2.
CASE
3-3. FRONT PANEL
SECTION
(Page 5)
(Page 5)
3-2. CASE
(Page 4)
3-4. MAIN BOARD
(Page 5)
1
screw (case3 TP2)
(8 mm)
(8 mm)
1
screw (case3 TP2)
(10 mm)
(10 mm)
1
screw (case3 TP2)
(10 mm)
(10 mm)
1
screw (case3 TP2)
(8 mm)
(8 mm)
2
three screws
(BVTP3
(BVTP3
×
8)
2
four screws
(BVTP3
(BVTP3
×
8)
3
case