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Connec on Diagram

Troubleshoo ng

Problem
Power
1. The power cord is connected in reverse.
indicator is off
2. Fuse or power cord is disconnected.
1. Yellow wiring is not connected to posi ve
electrode of the ba ery.
No display
1. No power.
No sound
2. Speaker wiring is disconnected.
3. No sources in supported format in
SD/MMC/TF and U disk.
4. The edge connector of SD/MMC/ TF
and U disk is dirty lead to poor contact.
1. Internal resistance of power supply is
Sound too low
too loud
(noise)
2. The antenna cable is loose.
1. One of the speakers wiring is
Mono only
disconnected.
2. The power amplifier IC is damaged.
Note:Subject to change without no ce!
Cause
2. The fuse of red wiring is disconnected.
Correctly connect the power cord. Check
and connect both power cord and fuse.
Connect the yellow
wiring to the posi ve electrode of the
ba ery. Replace with 1Afuse.
Connect the power cord. Connect the
speaker wiring. Check the sources in
SD/MMC/TF and U disk. Clean with
absolute alcohol.
Replace a new power supply.
Push the antenna cable firmly into the plug.
Connect the speaker wiring.
Replace with a new power amplifier IC.
8
Solu on

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