Sherbourn Technologies 5/5210A - Manual (Page 6)

6
Trouble-Shooting Symptom
Amplifier does not power up and the front LED
does not turn on.
No sound out of all channels.
No sound out of channels 1, 2, 3 and 4.
Does not enter power standby mode under music
trigger mode.
No sound from bridged channels.
Low power from bridged channels.
Low bass
Possible Causes
1. Power cord not connected at the rear “master”
AC receptacle.
1. Load connections not checked with LDS switch.
Make sure switch is set to OFF to complete the
procedure.
2. Trigger mode switch set incorrectly.
3. Music source not turned on.
1. Power cord not connected at the rear “slave”
AC receptacle.
1. Trigger Mode Switch may be incorrectly set to
ON, switch it to MUSIC to correct.
2. Leak through signal or noise from a preamp
keeps the amp on. You may need to switch off the
preamp completely or try 3 and 4 below.
3. System ground current may enter the 7/2100A
or 5/5210A via the signal cable. Earth ground the
preamp or the source CD player/tuner to bypass
the ground current from entering the power ampli-
fier.
4. Insert an isolation transformer with each signal
cable to break a noisy ground system.
1. Signal is not applied to the input of the even
numbered channels.
1. Speaker not connected between the related two
red speaker posts.
1. Speakers may be connected out of phase.