Prology CMD-220 Service manual
Car Audio
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
Troubleshooting ...................................................................... 1-6
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
CMD220
1-2
SPECIFICATIONS
General
Power supply 12V DC(11V-16V)
Test voltage 14.4V, negative ground
Maximum power output 50Wx4 channels
Continuous power output 25Wx4 channels (4 10% T.H.D.)
Suitable speaker impedance 4-8 ohm
Pre-Amp output voltage
4.0V(CD play mode: 1KHz, 0 dB, 10 K load)
Fuse 15A
ESP(optional) 30s(CD-DA)/120s (MP3)
Weight 2.38kg
Dimensions(WxHxD) 188x100x168mm
Aux-in ≥300mv
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
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)
Wowandutter Belowmeasurablelimits
Channel separation >60 dB
Components
Mounting collar 1
Wire connector 1
Operating instructions 1
Rubber cushion 1
Note:Specicationsandthedesignaresubjecttochangewithoutnoticeduetoimprovementsintechnology.
1-3
MEASUREMENT SETUP
1-4
HANDLING CHIP COMPONENTS
1-5
1-6
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
Disc
Radio
Error Display Messages
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 upside down:
Place disc in the correct direction,and the label side up.
Disc is dirty or damaged: Clean disc or change another disc.
Disc is dirty or damaged:
Clean CD or change another CD.
Mounting angle is over 30o: Adjust mounting angle to less than 30o.
Unstable mounting:
Mount the unit securely with the mounting parts.
Station is too far, or signals are too weak:
Select other stations of higher signal level.
Battery cable is not correctly connected:
Connect the battery cable to the terminal that is always live.
Disc upside down.
Disc format is not support or le date is wrong, check the disc.
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 is inside but
no sound.
Disc sound skips,
tone quality is low.
Sound skips due
to vibration.
Much noise in
broadcasts
Preset station
lost
No power or
no sound
2-1 2-1
DISMANTLING INSTRUCTIONS
1. Remove the front panel.
2. Remove the top, bottom cover and heatsank.
Loosen the 2 pcs screw
to remove the top cover.
Pull out the
FPC wire.
Loosen the 11 pcs screw
to remove the heatsank.
Loosen the 2 pcs screw
to remove the bottom
cover.
4. Loosen 4 pcs screw to remove the deck and mainboard.
Loosen the 2
pcs screw.
Pull out the 2
FPC wires.
Loosen the 2 pcs screw
to remove the mainboard.
Loosen the 2 pcs screw.
DISMANTLING INSTRUCTIONS
2-2 2-2
Service Position A Service PositionC
Service Position B Service Position D
SET BLOCK DIAGRAM
3 3
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