Sony MDXC-8970-R Service manual
MDX-C8970R
SERVICE MANUAL
SUPPLEMENT-1
File this supplement with the service manual.
Subject: Main/Display/Relay Boards Modification
AEP Model
UK Model
(ECN-CSB00896)
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
3. ELECTRICAL PARTS LIST ............................... 16
1. DISCRIMINATION
– MAIN BOARD (Component Side) –
– DISPLAY BOARD (Conductor Side) –
Former :1-674-590-11
New :1-674-590-12
Former :1-674-589-11
New :1-674-589-12
– RELAY BOARD (Component Side) –
Former :1-674-591-11
New :1-674-591-12
2
2. DIAGRAMS
IC803
MSM534001E-49TSKFDR3 (TYPE C: ENGLISH, FRENCH)
MSM534001E-50TSKFDR3 (TYPE A: ENGLISH, SPANISH)
MSM534001E-51TSKFDR3 (TYPE B: ENGLISH, GERMAN)
2-1. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
(In addition to this, the necessary note is printed in each block)
Note on Printed Wiring Boards:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
f
•
• b : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
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.
: internal component.
Note on Schematic Diagrams:
• 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.
f
•
• C : panel designation.
Note: The components identified by mark 0 or dotted line
• U : B+ Line.
• H : adjustment for repair.
• Pow er voltage is dc 14.4V and fed with regulated dc po wer
• V oltages are taken with a VOM (Input impedance 10 MΩ).
• Waveforms are taken with a oscilloscope.
• Circled numbers refer to waveforms.
• Signal path.
• Model Identification
: internal component.
with mark 0 are critical for safety.
Replace only with part number specified.
supply from ACC and BATT cords.
Voltage var iations may be noted due to normal produc-
tion tolerances.
Voltage var iations may be noted due to normal produc-
tion tolerances.
F : FM
f : MW/LW
E : MD
The destination is expressed with the model according to
the language of Program Rom mounted in the set.
How to identify the model is described below.
4
W or less unless otherwise
– POWER BOARD (Component Side) –
3
4
2-2. SCHEMATIC DIAGRAM – MAIN Board (1/5) –
MDX-C8970R
(Page 6)
(Page 9)
(Page 7)
(Page 8)
Note on Schematic Diagram:
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
55
no mark : FM
MDX-C8970R
2-3. SCHEMATIC DIAGRAM – MAIN Board (2/5) –
(Page
5)
(Page
7)
(Page 8)
Note on Schematic Diagram:
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
66
no mark : FM
2-4. SCHEMATIC DIAGRAM – MAIN Board (3/5) –
(Page 9)
MDX-C8970R
(Page 5)
(Page 6)
(Page
8)
(Page 9)
Note on Schematic Diagram:
• Voltages and waveforms are dc with respect to ground
77
under no-signal (detuned) conditions.
no mark : FM
( ) : MW
[]: LW
〈〈 〉〉 : MD PLAY
MDX-C8970R
2-5. SCHEMATIC DIAGRAM – MAIN Board (4/5) –
(Page 6)
(Page 5)
(Page
7)
(Page 15)
Note on Schematic Diagram:
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
〈〈 〉〉 : MD PLAY
88
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