background image

 
 
 
 
3.8 

Moisture in Display

 

3.8.1 

Water seen inside display after washing the mounting area

   

 

Radio is not designed to withstand pressurized streams of water. When rinsing the radio or around the radio, a 
very low pressure spray is recommended.   

 

Monitor the radio for strange or erratic behavior. If the issue persists, internal damage has occurred- seek to 
repair or replace. 

            3.8.2 

Slight Fog after operation 

 

Normal in cold weather but monitor

 

 

            3.8.3 

Heavy Condensation

 

 

The condensation may evaporate without harm to the radio.   

 

Monitor for strange or erratic behavior. If the issue persists, internal damage has occurred. Seek to repair or 
replace. 

 
3.9

 CD player won’t work 

 

If new radio, check to make sure the transit screws are removed. These are the 2 screws on the top of the radio. 

 

Make sure there is only 1 CD in the mechanism at a time.   

 

The MR18.3 only supports Analog CDs (i.e., store bought CDs)   

 

Reset the radio. See 

7

 for more information. 

 

If nothing else works, initiate warranty claim if you are under warranty.   

 
3.10

 CD door won’t close/open 

 

Initiate a warranty claim if you are under warranty

 
 

4.0 External Amplifier Issues

 

 
4.1 

Strong Hiss 

 

Reduce the input gain on the amplifier until the hiss is reduced to an acceptable level while still maintaining 

performance. Note, if both amplifier and stereo output can produce distortion, the input gain is much higher than it 
needs to be. In most situations, reduce gain levels will not produce detectable performance conditions. 

 

4.2 

Amplifier volume fluctuates or amplifier turns off and on

 

 

Check the grounds to both amplifier as well as radio. Corrosion on any of the contacts will reduce the ground 

 

Check the system voltage while operating the radio and amplifier. If the voltage fluctuates and drops below 11.5 volts, 

load test the battery, check the charging system, and check all power and ground wires/contacts for looseness or 
corrosion. 

 

Ground the amplifier’s chassis to the stereo’s chassis.   

4.3 

Audio is extremely low 

 

Check the amplifier’s gain setting and increase if necessary.

 

 
 
 
 
 
 
 
 
 

Summary of Contents for JBLMR18.3

Page 1: ...wer 3 3 Buttons controls not responding or behaving erratically 3 4 Poor reception or no reception 3 5 No audio speaker audio is unevenly distributed or some speakers not working 3 6 Low audio 3 7 Flu...

Page 2: ...er wires as this will cause permanent damage to the radio s output IC Tape off any unused speaker wires individually to prevent accidental shorting which can also harm the output IC Antenna must be in...

Page 3: ...tuations a bad fuse can be spotted visually this may not always be the case The best method would be to use a multi meter or a test light Ensure the battery power supply is putting out at least 12V wh...

Page 4: ...remotes remote adaptors and extensions If the stereo returns to normal operation plug one attachment in at a time until the discovering the defective part Check all remote connections for water intrus...

Page 5: ...iPod or MP3 player make sure the volume is turned up Check speaker connections Ensure each speaker wire is routed to the appropriate speaker terminal for which it is intended Inspect all speaker wire...

Page 6: ...for more information If nothing else works initiate warranty claim if you are under warranty 3 10 CD door won t close open Initiate a warranty claim if you are under warranty 4 0 External Amplifier Is...

Page 7: ...corrosion or rust Replace Sirius tuner 5 2 2 Displays Check Antenna Antenna to satellite line of site is disrupted Check antenna connection to tuner for disconnection or looseness Check the same conne...

Page 8: ...othpick gently work the cooking spray between the shaft and rubber membrane lubrication the entire perimeter of the shaft DO NOT INSERT TOOTHPICK MORE THAN 1 16 INCH AS THIS CAN PUNCTURE THE RUBBER SE...

Page 9: ...sting Twist the knob in one direction and let go The knob should quickly bounce back to center Repeat the step above but now in the opposite directly Check other controls on the stereo for proper oper...

Page 10: ...8 0 Location of Production and Serial Numbers These numbers are found on the silver label location on the bottom of the radio s chassis See below example...

Reviews: