Appendix a - troubleshooting – Abbingdon Music Research AM-77 Reference Class User Manual

Page 50

Appendix A - Troubleshooting

Symptom

Possible cause

Solution

With power ON

• poor/no power plug connection

• insert the power plug firmly into the AC

no power is registered

at mains power point

• blown fuse at mains plug

• check and change IEC/mains plug fuse

No sound

• incorrect audio cable connections

• connect the sources to the AM-77 correctly

• incorrect amplifier operation

• make sure that the input selector on the AM-77 is set to
the desired source

Strange ‘blast’ sound

• check speaker connectors are not

• adjust fitting between speaker and chassis

in contact with the chassis/terminal

• Ensure no contact between chassis and spade
terminals (no ‘short circuiting’)

Remote control does

• remote control batteries have

• replace 2 x AAA batteries

not work

expired

• object obscuring remote sensor on

• remove any objects directly in front of the AM-77

the AM-77, no ‘line of sight’

A ‘humming’ sound

• loose cable connections

• re-attach the loose cables correctly

can be heard

Front switches ‘jump’/

• static electricity

• ‘Touch’ the chassis prior to pressing a sensor to dis

enter Standby

charge. Then press the desired sensor