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OWNER’S MANUAL
PLL SYNTHESIZER STEREO RADIO WITH
COMPACT DISC PLAYER DIGITAL
MS-503
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INSTALLATION
Here is the installation diagram.
Precautions
1. Choose the mounting location where the
unit will not interfere with the normal
driving functions of the driver.
2. Avoid installing the unit where it would
be subject to high temperature, such as
from direct sunlight, or from hot air, from
the heater, or where it would be subject
to dust, dirt or excessive vibration.
3. For safe installation, use the mounting
hardware provided by the manufacturer.
Bracket
Fire Wall
DASH BOARD
HEX NUT
SPRING WASHER
TAPPING SCREW
PLAIN WASHER
CONSOLE
MOUNTING HOUSING
METAL MOUNTING STRAP
HEX BOLT
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TRIM
PLATE
SLEEVE
SLOT
RELEASE KEY
REMOVE THE UNIT FROM THE DASH BOARD
1. Insert the supplied key into the slot as shown, and slide the unit out of the dash
board while holding the trim plate.
2. Remove the metal strap attached to the back of the unit.
3. Remove the key from the slot.
4. Disconnect all the wires of the unit and the antenna plug.
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WIRING CONNECTION
1. All connections should be soldered and insulated with electrical tape.
2. Be sure to connect the red power input lead to + 12V power terminal after all the
other leads have been properly connected.
3. Run all ground wires to a common ground.
ANTENNA RELAY WIRE
A blue wire has been provided for relay controlled antenna. The relay will automatically
activate antenna upward when unit is turn on and retract when unit is turn off.
CAUTION:
Do not hook up blue wire to motor wire or damage may occur to the unit.
WIRING CONNECTION
Note:
1. For 2-speakers system, green, violet, white/black and grey/black wire leads are
unconnected and isolated.
2. For 2-speakers system, keep the fader rotation at center position to maintain the
existing volume level.
MEMORY
BACK-UP
FRONT
Lch SPK.
WHITE
WHITE/BLACK
MAIN UNIT
IGNITION
SWITCH (B+)
POWER
ANTENNA
REAR
Lch SPK.
RED
GROUND (B–)
YELLOW
BLACK
CHOKE BOX
BLUE
RCA CABLE
(GREY)
ANTENNA CONNECTOR
GREEN
GREEN/BLACK
4-SPEAKERS SYSTEM
Lch
SPK.
WHITE
GREEN/BLACK
2-SPEAKERS SYSTEM
GREY
GREY/BLACK
VIOLET
VIOLET/BLACK
4-SPEAKERS SYSTEM
FRONT
Rch SPK.
REAR
Rch SPK.
Rch
SPK.
GREY
VIOLET/BLACK
2-SPEAKERS SYSTEM
Rch RED
Lch WHITE
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GENERAL OPERATION
• ON/OFF
Rotate the inner knob (1) to turn on or off the unit and adjust the sound output level.
• BALANCE
Rotate the outer knob (2) to adjust sound balance between left channel and right
channel.
• SELECT MODE
Press TUNER button (4) to switch to radio mode. When the compact disc is
inserted in the disc slot, press CD button (10) to switch to CD mode.
• LIQUID CRYSTAL DISPLAY
Exhibit current frequency and activating functions on the display (18).
Note: If the unit has FADER function, the operation of knobs (1), (2) and (3) have
some changes as below:
- ON/VOL push BAL
Rotate the inner knob (1) to turn on or off the unit and adjust the sound
output level. Push inward and rotate the knob to adjust the sound balance
between left and right speakers.
- FADER
Rotate the outer knob (2) to adjust the sound balance between front and rear
speakers.
- BASS push TRE
Rotate the knob (3) to adjust the sound quality of low frequency level.
Push inward and rotate the knob to adjust the sound quality of high frequency
level.
9 123 11 13 10
4
6147
8
16
5
15
18
17
1
2
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RADIO OPERATION
• SELECT BAND
Press BAND button (5) to change bands as below:
• SELECT STATION
Press MANU/SKIP buttons (7) or (6) to tune the frequency downward or
upward by step. Hold it for fast tuning.
• PRESET PROGRAMME MEMORY
In radio mode, press MANU/SKIP buttons (7) or (6) to seek the desired
frequency in the current band, then press MEM button (8) and “MEMORY” is
flashing on the display, and press PSET/RPT button (15) to choose the memory
number and press MEM button (8) again to store up the chosen station.
• CALLING UP THE STORED STATION
In radio mode, press PSET/RPT button (15) to call up the first stored station in
current
band. Repeatedly pressing to call up the stored stations in current band in
turn.
• TIME SETTING
Press DISPLAY button (9) to change the display and the clock is showing on the
display. Press MEM button (8) in clock display and the hour is flashing, press
MANU/SKIP buttons (7) or (6) to adjust the hour. Press MEM button (8) once
more in clock display and the minute is flashing, press MANU/SKIP buttons (7)
or (6) to adjust the minute. Finally press MEM button (8) to store up the setting.
FM AM
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CD OPERATION
• DISC PLAY
Push a compact disc with the label
side facing up into the disc slot (11)
and you will hear a click sound.
If no sound heard, the CD should be
incorrectly inserted into the disc slot.
(As figure shows)
When there have correspondingly
showing on the display, press button
(13) to start playing the first track of the
disc. The display will indicate the track
number and playing time.
During the playing, press button (13) to temporarily stop the playing or press
button (14) to stop the playing.
Press (eject) button (12) to eject CD from the slot. The unit switches to radio
operation.
• SELECT TRACKS
In CD operation, press MANU/SKIP buttons (7) or (6) to move to the previous
track or the following track. Track number shows on display.
In CD operation, hold MANU/SKIP buttons (7) or (6) to fast reverse or fast
forward. CD play starts from when you release the button.
• PRESET THE MEMORY PLAY
In CD operation, press button (14) to stop playing, press MEM button (8), there
have correspondingly showing and “MEMORY” “TRACK” are flashing on the
display. Then press MANU/SKIP buttons (7) or (6) to select the track.
Press MEM button (8) again to store up the chosen track and next preset is ready.
When the preset is finished, press button (13) again to start to memory playing.
Note: If pressing button (14), all program memory is cleared.
• REPEAT
In CD operation, press PSET/RPT button (15) to continuously repeat the same disc.
Press once more to continuously repeat the same track. Press it at the third time
to release the mode.
• PLAY IN RANDOM ORDER
In CD operation, press RND button (16) to play all tracks on current CD in random
order. Press it again to cancel the function.
• PREVIEW ALL TRACKS
In CD operation, press button (14) to stop playing and press INT button (17) to
play first several seconds of each track on current CD. Press again to stop intro
and recover normal playing.
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SPECIFICATION
GENERAL
Power Supply Voltage : 12 Volts DC, Negative Ground
Dimensions Chassis : 50 mm (H) x 178 mm (W) x 155 mm (D)
Tone Controls
- Bass (at 100 Hz) : ± 10 dB
- Treble (at 10 KHz) : ± 10 dB
Maximum Power : 4 x 10 watts
Load Impedance : 8 Ampere (max.)
CD PLAYER
Frequency Response : 20 Hz - 20 KHz
Channel Separation : > 50 dB
Signal to Noise Ratio : > 60 dB
RADIO
FM
Frequency Coverage : 87.5 to 107.9 MHz
IF : 10.7 MHz
Sensitivity (30 dB S/N) : 5 µV
Stereo Separation : > 25 dB
AM
Frequency Coverage : 520 to 1710 KHz
IF : 450 KHz
Sensitivity (20 dB S/N) : 32 dB
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TROUBLE SHOOTING
Before going through the check list, check wiring connection. If any of the problems
persist after check list has been made, consult your nearest service dealer.
Symptom Cause Solution
No power. The car ignition is not on. If the power supply is properly
connected to the car accessory
terminal, switch the ignition key to
“ACC”.
The fuse is blown. Replace the fuse.
No sound. Volume is in minimum. Adjust volume to a desired level.
Wiring is not properly Check wiring connection.
connected.
The operation The built-in microcomputer Press the RESET button.
keys do not is not operating properly Front panel is not properly fixed into
work. due to noise. its place.
Sound skips. The installation angle is Adjust the installation angle to less
not more than 30 degrees. than 30 degrees.
The disc is extremely dirty Clean the compact disc, then try to
or defective disc. play a new one.
The radio does The antenna cable is not Insert the antenna cable firmly.
not work. The connected.
radio station
automatic The signals are too weak. Select a station manually.
selection does
not work.
88-C0781-02
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