CMM7720
20
OPTIONS
General
PROBLEM
CAUSE
ACTION
Unit will not
turn on
(no power)
Red and/or Yellow wire not connected or
incorrect voltage
Check connections for proper voltage
(11~16VDC)
Black wire not connected
Check ground connection
Blown fuse on unit or vehicle
Replace fuse(s)
Unit has power
(but no sound)
Speaker wires not connected
Check all connections, including speakers
Speakers are blown
Replace speakers
One or more speaker wires touching each
other or touching chassis ground
Insulate all bare speaker wires from each
other and chassis ground
Unit blows
fuse(s)
Yellow or red wire touching chassis ground
Check for pinched or shorted wires
Speaker wires touching chassis ground
Check for pinched or shorted wires
Incorrect fuse rating
Use fuse with correct rating
Unit has audio
(but no video)
Parking brake safety circuit not connected
Parking brake not applied
Check connections at parking brake
Apply parking brake as described in
manual
Video Playback Codec is not supported
See Media Codec Support section
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 Name:
Dealer Phone:
Purchase Date:
For Your Records
Dealer Info
Troubleshooting
Customer Support
1-888-921-4088
(Monday-Friday, 9AM-5PM EST)
Visit https://www.jensenmobile.com
