Mystery MCD-968MP, MCD-969MP Schematics
Car Audio
MCD-968MP
Service
Service
Service Manual
TABLE OF CONTENTS
Page
Technical Specications ......................................................... 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
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
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 μ
Frequency response 30 Hz-15kHz
Stereo separation 30dB(1 kHz)
Image response ratio 50dB
IF response ratio 70dB
Signal/noise ratio 55dB
2.0V(CD play mode: 1KHz, 0 dB, 10 K load)
1-2
AM(MW) Radio
Frequency range 522-1620 khz (Europe mode)
530-1710 khz (USA mode)
Usable sensitivity(S/N=20dB) 30 dB μ
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 utter Below measurable limits
Channel separation >60 dB
Components
Mounting collar 1
Wire connector 1
Operating instructions 1
Rubber cushion 1
Remote Control 1
Note: Specications and the design are subject to change without notice due to improvements in technology.
MEASUREMENT SETUP
1-3
HANDLING CHIP COMPONENTS
1-4
1-5
PREPARATIONS
Antenna
Fuse 15A
Line-out
( White)
( Red )
Wiring Diagram
1-6
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 re 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
No power or
no sound
Disc
Car's engine switch is not on: Turn your car's key to ACC or ON.
Cable is not correctly connected: Check connection.
Fuse is burnt. Replace fuse: Check volume or mute on / off.
If the above solutions cannot help: Press the RESET button.
Disc is inside but
no sound.
Disc sound skips,
tone quality is low.
Sound skips due
to vibration.
Disc is upside down:
Disc is dirty or damaged: Clean disc or change another disc.
Disc is dirty or damaged:
Mounting angle is over 30o: Adjust mounting angle to less than 30o.
Unstable mounting: Mount the unit securely with the mounting parts.
Radio
Much noise in
broadcasts
Preset station
lost
Station is too far, or signals are too weak:
Battery cable is not correctly connected: Connect the battery cable to the terminal that is always live.
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.
Place disc in the correct direction,and the label side up.
Clean CD or change another CD.
Select other stations of higher signal level.
Disc upside down.
Disc format is not support or le date is wrong, check the disc.
DISMANTLINGINSTRUCTIONS
1Removethefrontpanel.
2Removethetop,bottomcoverandheatsank.
Loosenthe2pcsscrew
toremovethetopcover.
2-1
2-1
Pulloutthe
FPCwire.
Loosenthe11pcsscrew
toremovetheheatsank.
Loosenthe2pcsscrew
toremovethebottom
cover.
3Loosen4pcsscrewtoremovethedeckandmainboard.
Loosenthe2
pcsscrew.
Pulloutthe2
FPCwires.
Loosenthe2pcsscrew
toremovethemainboard.
Loosenthe2pcsscrew.
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