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MX-GA8
JVC MX-GA8 Service Manual
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1-26 (No.MB080)
5.2
Tuner Malfunction(FM/AM) : COMMON
Main board
CW102 PIN NO2, 9V
Voltage normal?
ICO1(LV23000)of tuner board,
Tuner BAND Switching?
(pin29)
ICO1(LV23000)
VT Level Changeable?
(pin28)
ICO1(LV23000)
if input normal?
(pin 1,4)
Check the Main board
EZD02, ER104.
Check the Tuner board
ICO1(LV23000)
pin 15,16,17,18
Check the Frpnt board
UIC01(micon -com)
Check the Front board
ICO1(LV23000) Oscillator
XTAL(75KHz)
Check the Tuner board,
FM pack,MW OSC,
MW ANT.
Check the Main board
EIC01(TDA7442D) Function IC
No
No
No
No
Yes
Yes
Yes
Yes
25
27
Table of Contents
Table of Contents
1
Specification
2
Precaution
3
Safety Precautions
3
Warning
3
Critical Parts for Safety
3
Preventing Static Electricity
4
Grounding to Prevent Damage by Static Electricity
4
Attention When Traverse Unit Is Decomposed
4
Handling the Traverse Unit (Optical Pickup)
4
Specific Service Instructions
5
Removing the CD Tray Fitting
6
Removing the Metal Cover
6
Main Body
6
Disassembly
6
Removing the CD Changer Unit
7
Removing the Front Panel Assembly
8
Removing the Heat Sink & Amp. Board
9
Removing the Tuner Board
9
Removing the Rear Panel
9
Removing the Main Board
10
Removing the Power Cord
10
Removing the Power Ics
10
Removing the Power Transformer
10
Removing the Headphone Jack Board
11
Removing the Front Board
11
Front Panel Assembly
11
Removing the CD Switch Board
11
CD Changer Unit
12
Removing the CD Tray
12
Reinstall the CD Tray
12
Removing the Sensor Board
13
Removing the Turn Tray Motor
13
Removing the CD Mechanism Holder Assembly
15
CD Mechanism Section
16
Removing the Pickup Unit
16
Removing the Motor Board
16
Removing the Feed Motor
16
Remove the Erase Head
17
Cassette Mechanism Section
17
Removing the R/P Head
17
Removing the Motor
18
Removing the Mechanism Board
18
Removing the Flywheel
18
Speaker Section
19
Removing the Side Panel
19
Removing the Side Speaker
19
OSC Voltage
20
Tuner
20
Adjustment Location of Tuner PCB
20
Adjustment
20
FM THD Adjustment
21
AM(MW) I.F Adjustment
21
FM Auto Search Level Adjustment
21
FM Search Level Adjustment
21
Cassette Deck
22
To Adjust Tape Speed
22
Recording /Play Head
22
To Adjust Playback Level/Rec
23
Adjust Deck 1 Play Level
23
Adjust Desk 2 Play Level/ REC BIAS
23
Power Malfunction : COMMON
24
Amplifier
24
Troubleshooting
24
No Output : MXGA7/GA8
25
Tuner Malfunction(FM/AM) : COMMON
26
Tape : COMMON
27
CD
28
POWER on and CD FUNCTION
28
MP3 Parts
29
Mp3 Function
29
Contents
31
Block Diagram
33
Standard Schematic Diagrams
34
Main Section
34
Amp. Section
35
Front Section
36
Pirnted Circuit Boards
37
Power Board
37
Front Board
38
Trans Board
38
Parts List
41
CD Changer Mechanism
42
Exploded View of General Assmbly and Parts List
42
General Assembly
44
Speaker Assmbly and Parts List
45
CD Changer Mechanism Assembly and Parts List
46
Cassette Mechanism Assembly and Parts List
48
Cassette Mechanism
49
Electrical Parts List
50
Main Board
50
Front Board
52
Packing Materials and Accessories Parts List
58
Packing and Accessories
59
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JVC MX-GA8 Specifications
General
Brand
JVC
Model
MX-GA8
Category
Stereo System
Language
English
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