Ma Audio HK-4000D User Manual - page 4
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TROUBLE SHOOTING
SYMPTOM
NO SOUND.
CHECK POINT
Is the power LED illuminated?
CURE
1. Check fuses in amplifier.
2. Be sure Turn-on lead is connected.
3. Check signal leads.
4. Check gain control.
5. Check Tuner/Deck volume level.
6. Clean contacts on fuse holders.
CHECK POINT
Is the Overload LED illuminated?
CURE
Check for speaker short or amplifier overheating.
SYMPTOM
AMP NOT SWITCHING ON.
CHECK POINT
No power to power wire.
CURE
Repair power wire or connections.
Check point
No power to remote wire with Head Unit on.
CURE
Check connections to radio.
Check point
Fuse broken.
CURE
Replace Fuse.
SYMPTOM
NO SOUND IN ONE CHANNEL.
CHECK POINT
Check Speaker Leads.
CURE
Inspect for short circuit .
Check for open Connection.
CURE
Check Speaker Leads Reverse Left and
Right RCA inputs to determine if it is
occurring before the amp.
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TROUBLE SHOOTING continued...
SYMPTOM
AMP TURNING OFF AT MED/HIGH VOLUME.
CHECK POINT
Check Speaker load impedance.
CURE
Inspect that speaker load impedance recommendations are
followed. Check wiring configuration for speakers.(To Verify
proper load impedance, use an OHM meter to measure the total
load for each channel of the amplifier.
SYMPTOM
SYSTEM PROTECTION LED IS LIT
CHECK POINT
Temperature Shut-down.
CURE
Check for proper air ventilation
Change amplifier location
CHECK POINT
Speaker output shorted.
CURE
Check speaker wiring
Check for blown speaker by disconnecting
one at a time and check for LED change.
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