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CMM720
OPTIONS
Troubleshooting
PROBLEM
Unit will not
turn on
(no power)
Unit has power
(but no sound)
Unit blows
fuse(s)
Unit has audio
(but no video)
Customer Support
1-888-921-4088
(Monday-Friday, 9AM-5PM EST)
For Your Records
20
20
CAUSE
incorrect voltage
Black wire not connected
Blown fuse on unit or vehicle
Speaker wires not connected
Speakers are blown
One or more speaker wires touching each
other or touching chassis ground
Yellow or red wire touching chassis ground
Speaker wires touching chassis ground
Incorrect fuse rating
Parking brake safety circuit not connected
Parking brake not applied
Video Playback Codec is not supported
Please keep your original sales receipt and be
prepared to provide this receipt in the event
you require service, as your original receipt
is considered the best proof of purchase and
indicates the date you purchased your JENSEN
product.
Dealer Info
Dealer Name:
Dealer Phone:
Purchase Date:
General
Check connections for proper voltage
(11~16VDC)
Check ground connection
Replace fuse(s)
Check all connections, including speakers
Replace speakers
Insulate all bare speaker wires from each
other and chassis ground
Check for pinched or shorted wires
Check for pinched or shorted wires
Use fuse with correct rating
Check connections at parking brake
Apply parking brake as described in
manual
See Media Codec Support section
ACTION
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