Troubleshooting; Fcc Compliance - Jensen MPR2121 Installation & Owner's Manual

Problem
Unit will not turn on
(no power)
Unit has power
(but no sound)
Unit blows fuses
NO FILE appears
on display
NO SUPPORT appears
on display
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that may cause
undesired operation.
Warning: Changes or modifications to this unit not expressly approved by the party responsible
for compliance could void the user's authority to operate the equipment.
Note: This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment generates,
uses and can radiate radio frequency energy and, if not installed and used in accordance with
the instructions, may cause harmful interference to radio communications. However, there is
no guarantee that interference will not occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception, which can be determined by turning
the equipment off and on, the user is encouraged to try to correct the interference by one or
more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver
is connected.
• Consult the dealer or an experienced radio/TV technician for help.

Troubleshooting

Cause
Yellow wire not connected or incorrect
voltage Red wire not connected or
incorrect voltage
Black wire not connected
Fuse blown
Speaker wires not connected
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
No playable MP3 files found
on the device
An invalid ID3 tag version is present

FCC Compliance

Action
Check connections for proper
voltage (11~16VDC)
Check connection to ground
Replace fuse
Check connections at speakers
Insulate all bare speaker wires
from each other and chassis
ground
Check for pinched wire
Check for pinched wire
Use fuse with correct rating
Check the device for valid
MP3 files
Version 1.0 to 2.0 ID3 tags are
supported.
MPR2121
13