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Car Audio MCD-968MP

Service
Service

Service Manual
TABLE OF CONTENTS
Page
Technical Specifications.......................................................... 1-2
Measurement setup. ............................................................... 1-3
.
Service Aids, Safety Instruction, etc.............................. 1-4 to 1-5
Preparations & Controls................................................ 1-6 to 1-7
Maintenance & Troubleshooting.............................................. 1-8
Disassembly Instructions & Service positions ............................2
Set Block diagram.......................................................................3
Set Wiring diagram......................................................................4
Key Board. ..................................................................................5
.
Servo Board................................................................................6
Main Board..................................................................................7
Set Mechanical Exploded view & parts list..................................8
1-2
SPECIFICATIONS

General
Power supply 12V DC(11V-16V)
Test voltage 14.4V, negative ground
Maximum power output 45Wx4 channels
Continuous power output 25Wx4 channels (4 10% T.H.D.)
Suitable speaker impedance 4-8 ohm
Pre-Amp output voltage 2.0V(CD play mode: 1KHz, 0 dB, 10 K load)
Fuse 15A
ESP(optional): 30s(CD-DA)/120s (MP3)
Weight 2.38kg
Dimensions(WxHxD) 188x100x168mm

FM Stereo Radio
Frequency range 87.5 - 108.0 Mhz (Europe mode)
87.5 - 107.9 Mhz (USA mode)
Usable sensitivity 8 dB
Frequency response 30 Hz-15kHz
Stereo separation 30dB(1 kHz)
Image response ratio 50dB
IF response ratio 70dB
Signal/noise ratio 55dB

AM(MW) Radio
Frequency range 522-1620 khz (Europe mode)
530-1710 khz (USA mode)
Usable sensitivity(S/N=20dB) 30 dB

Disc Player
System Disc digital audio system
Frequency response 20 Hz - 20 kHz
Signal/noise ratio >86 dB
Total harmonic distortion Less than 0.20%(1 kHz)
Wow and flutter Below measurable limits
Channel separation >60 dB

Components
Mounting collar 1
Wire connector 1
Operating instructions 1
Rubber cushion 1
Remote Control 1

Note: Specifications and the design are subject to change without notice due to improvements in technology.
1-3
MEASUREMENT SETUP
1-4
HANDLING CHIP COMPONENTS
1-5
1-6
PREPARATIONS

Wiring Diagram

( White)
Line-out ( Red )

Antenna Fuse 15A
1-7
CONTROLS
Power on : Press button of PWR or any other button to turn on the unit.

-Power ON/OFF
-Radio
-Disc play(when disc is in)
-FM Stereo Radio/AM Radio/BAND SELECT
-Mute
-Rotete the control to adjust volume level.
-Push once or more to select Volume/Bass/Treble/Balance/Fader, rotate the control to adjust level.
-Push for more than 2 seconds to menu function.
-SEEK mode
-Disc play/pause top play(press more than 2 sec.)
-Program scan play (10 sec.)
-Track repeat play
-Track random play
-MP3 Folder down: MP3 track -10 down
-MP3 Folder up: MP3 track +10 up
-Radio Tune
AMS
-Radio preset scan
-Radio auto preset
-MP3 search mode
-Time setup(press more than 2 sec.)
-Display switch
-Sound select
-Loudness(press more than 2 sec.)
-Reset switch
-Disc Eject
. - Radio Preset
Press to tune in a preset station. Hold for more than 2 seconds to store station.
1-8
MAINTENANCE AND TROUBLESHOOTING

Maintenance

Clearing disc
When a disc becomes dirty, clean it with a cleaning cloth.
Wipe the disc from the center out.

Cleaning the disc lens
After prolonged use, dirt or dust may accumulate at the lens. To ensure good playback quality, clean the disc with Philips CD lens Cleaner or any
commercially available cleaner. Follow the instructions supplied with cleaner.

Cleaning the heads and the Tape Parts
To ensure good playback quality, clean the heads A , the capstan B , and pressure roller C after every 50 hours of tape operation. Used a
cotton swab slightly moistened with cleaning fluid or alcohol.
You can also clean the heads by playing a cleaning tape once.

Troubleshooting

If you suspect something is wrong, immediately switch power off. Do not use the unit in abnormal condition, for example without sound, or with
smoke or foul smell, can cause fire or electric shock. Immediately stop using it and call the store where you purchased it. Never try to repair the
unit yourself because it is dangerous to do so.

General
Car's engine switch is not on: Turn your car's key to ACC or ON.
No power or Cable is not correctly connected: Check connection.
no sound Fuse is burnt. Replace fuse: Check volume or mute on / off.
If the above solutions cannot help: Press the RESET button.
Disc

Disc is inside but Disc is upside down: Place disc in the correct direction,and the label side up.
no sound. Disc is dirty or damaged: Clean disc or change another disc.

Disc sound skips,
Disc is dirty or damaged: Clean CD or change another CD.
tone quality is low.

Sound skips due Mounting angle is over 30o: Adjust mounting angle to less than 30o.
to vibration. Unstable mounting: Mount the unit securely with the mounting parts.

Radio

Much noise in
Station is too far, or signals are too weak: Select other stations of higher signal level.
broadcasts

Preset station
Battery cable is not correctly connected: Connect the battery cable to the terminal that is always live.
lost

Error Display Messages

Disc mechanism error: Press button more than 2 seconds to eject the disc. In case that the disc
cannot be ejected by pressing button, press the RESET switch and press the button 2 seconds
to eject the disc. If still not ejecting, consult your dealer.

Disc upside down.

Disc format is not support or file date is wrong, check the disc.
2-1 2-1

DISMANTLING INSTRUCTIONS

1 Remove the front panel.

Pull out the
FPC wire.

2 Remove the top, bottom cover and heatsank.

Loosen the 2 pcs screw
to remove the top cover.
Loosen the 11 pcs screw
to remove the heatsank.

Loosen the 2 pcs screw
to remove the bottom
cover.

3 Loosen 4 pcs screw to remove the deck and mainboard.

Loosen the 2 pcs screw
to remove the mainboard.

Loosen the 2
pcs screw.

Pull out the 2
FPC wires.

Loosen the 2 pcs screw.
2-2 2-2

DISMANTLING INSTRUCTIONS

Service PositionA Service Position C

Service Position B Service Position D
3 3

SET BLOCK DIAGRAM
4 4

SET WIRING DIAGRAM
5-1 5-1
LCD PIN CONNECTION

KEY BOARD

TABLE OF CONTENTS
PIN SEGMENT DISPLAY
LCD Display ..................................................................... 5-1
Key Board Circuit Diagram .............................................. 5-2
Key Board Layout Diagram ............................................. 5-3
Elect rical Parts List ....................................... ...... . 5-4
5-2 5-2

KEY BOARD - CIRCUIT DIAGRAM
5-3 5-3

KEY BOARD - LAYOUT DIAGRAM
TOP VIEW

KEY BOARD - LAYOUT DIAGRAM
BOTTOM VIEW
5-4 5-4

ELECTRICAL PARTS LIST - KEY BOARD ELECTRICAL PARTS LIST - KEY BOARD
GREEN LIGHT RED LIGHT
Part N O. Description Q TY Loc ation Part N O. Desc ription Q TY Loc ation
12160 40001 02 RES,1 K,

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