MDX-C7890R - Sony Car Audio Service Manual (repair manual)

Model
MDX-C7890R
Pages
47
Size
809.52 KB
Type
PDF
Document
Service Manual
Brand
Device
Car Audio
File
mdx-c7890r.pdf
Date

View Sony MDX-C7890R Service Manual online

MICROFILM
SERVICE MANUAL
FM/MW/LW MINIDISC PLAYER
AEP Model
SPECIFICATIONS
MDX-C7890R
Model Name Using Similar Mechanism
MDX-C7900R
Base Mechanism Type
MG-164KT-138
Optical Pick-Up Name
KMS-241A/J2N
– 2 –
1.
SERVICING NOTES
................................................ 2
2.
GENERAL
................................................................... 3
3.
DISASSEMBLY
......................................................... 9
4.
ELECTRICAL  ADJUSTMENTS
Test Mode ........................................................................ 14
MD Section ..................................................................... 14
Tuner Section .................................................................. 14
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C dur-
ing repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
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.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
3-023-589-01 (AEP: TYPE 2)
3-023-590-01 (AEP: TYPE 1)
S
®
MDX-C7890R
MODEL NO.
FM/MW/LW  MINIDISC  PLAYER
POWER  SELECT  SWITCH
C E
A
• TYPE A/B Discrimination
[MAIN  BOARD]
 
(Component Side)
• Model  Identification
– Model Number Label –
IC700
MB90574PFV-G-113-BND ( TYPE A )
MB90F574PFV-G-113 ( TYPE B )
Laser Diode Properites
• Material: GaAlAs
• Wavelength: 780 nm
• Emission Duration: continuous
• Laser Output Power: less than 44.6 µW*
* This output is the value measured at a distance of 200 mm
from the objective lens surface on the Optical Pick-up Block.
SAFETY-RELATED  COMPONENT  WARNING!!
COMPONENTS  IDENTIFIED  BY  MARK  
!
  OR  DOTTED
LINE  WITH  MARK  
!
  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.
SECTION  1
SERVICING  NOTES
5.
DIAGRAMS
5-1. Printed Wiring Boards
– MECHANISM DECK Section – ................................. 17
5-2. Schematic Diagram
– MECHANISM DECK Section – ................................. 19
5-3. Schematic Diagram – MAIN Section – .......................... 23
5-4. Printed Wiring Board  – MAIN Section – ...................... 27
5-5. Printed Wiring Board  – PANEL Section – .................... 31
5-6. Schematic Diagram  – PANEL Section – ....................... 33
5-5. IC Pin Function Description ........................................... 35
7.
EXPLODED  VIEWS
................................................ 52
8.
ELECTRICAL  PARTS  LIST
............................... 56
TABLE  OF  CONTENTS
– 3 –
SECTION  2
GENERAL
This section is extracted from
instruction manual.
– 4 –
– 5 –
– 6 –
– 7 –
– 8 –
– 9 –
Note:
 Follow the disassembly procedure in the numerical order given.
SECTION  3
DISASSEMBLY
FRONT  PANEL
COVER  ASS’Y, PANEL (SUB) ASS’Y
1
Push the button (release).
2
3
Remove the front panel of the arrow.
3
four screws
(PTT2.6 
×
 6)
3
screw
(PTT2.6 
×
 6)
1
1
2
cover ass’y
4
panel (sub) ass’y
– 10 –
MECHANISM  DECK (MG-164KT-138)
MAIN  BOARD
1
two screws
(PTT2.6 
×
 4)
2
mechanism deck
(MG-164KT-138)
5
insulating sheet
4
main board
3
three screws
(PTT2.6 
×
 6) (ground point)
1
two screws
(PTT2.6 
×
 10)
2
heat sink
1
eight screws
(PTT2.6 
×
 10)

Download Sony MDX-C7890R Service Manual (Repair Manual)

Here you can view online and download Sony MDX-C7890R Service Manual in PDF. MDX-C7890R service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony MDX-C7890R Car Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.