Read Sony MDX-C8970 (serv.man2) Service Manual online
SERVICE MANUAL
MDX-C8970
SUPPLEMENT-1
File this supplement with the service manual.
US Model
Subject: Main/Display/Relay Boards Modification
CONTENTS
1.
DISCRIMINATION
....................................................
2
2.
DIAGRAMS
2-1. Note for Printed Wiring Boards and
Schematic Diagrams .......................................................
3
2-2. Schematic Diagram – MAIN Board (1/5) – ..................
5
2-3. Schematic Diagram – MAIN Board (2/5) – ..................
6
2-4. Schematic Diagram – MAIN Board (3/5) – ..................
7
2-5. Schematic Diagram – MAIN Board (4/5) – ..................
8
2-6. Schematic Diagram – MAIN Board (5/5) – ..................
9
2-7. Printed Wiring Board
– MAIN Board (Component Side) – .............................. 10
2-8. Printed Wiring Board
– MAIN Board (Conductor Side) – ................................ 11
2-9. Printed Wiring Board – DISPLAY Board – ................. 12
2-10. Schematic Diagram – DISPLAY Board – ..................... 13
2-11. Printed Wiring Board – RELAY Board – ...................... 14
2-12. Schematic Diagram – RELAY Board – ......................... 15
2-10. Schematic Diagram – DISPLAY Board – ..................... 13
2-11. Printed Wiring Board – RELAY Board – ...................... 14
2-12. Schematic Diagram – RELAY Board – ......................... 15
3.
ELECTRICAL PARTS LIST
............................... 16
(ECN-CSB00896)
2
1.
DISCRIMINATION
Former :1-674-589-11
New
New
:1-674-589-12
Former :1-674-590-11
New
New
:1-674-590-12
Former :1-674-591-11
New
New
:1-674-591-12
– MAIN BOARD (Component Side) –
– RELAY BOARD (Component Side) –
– DISPLAY BOARD (Conductor Side) –
3
2.
DIAGRAMS
2-1.
NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
(In addition to this, the necessary note is printed in each block)
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
f
: internal component.
•
C
: panel designation.
Note on Printed Wiring Boards:
• X
: parts extracted from the component side.
• Y
: parts extracted from the conductor side.
•
f
: internal component.
• b
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated)
•
U
: B+ Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
• Signal path.
F
: FM
f
: AM
E
: MD
Note: The components identified by mark
0
or dotted line
with mark
0
are critical for safety.
Replace only with part number specified.
Caution:
Pattern face side:
Pattern face side:
Parts on the pattern face side seen from
(Conductor Side)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Component Side)
the parts face are indicated.
4