www.pulse-audio.co.uk
| APA Series User Manual
OPERATION
MAINTENANCE
No user serviceable parts inside, refer all servicing issues to qualified service personnel.
Clean case with a lint-free dry or slightly damp cloth, keep ventilation grille and fans clear of debris.
TROUBLESHOOTING
Errors and omissions excepted.
Copyright© 2014. Pulse
Check mains for correct voltage as indicated near to the IEC mains inlet on the rear panel. Connect to mains
supply using the IEC cable provided.
Connect the outputs A+B to speakers via speaker connectors, jack or binding posts, ensuring that the minimum
impedance is no lower than 4 per channel
When using 8 speakers, connect the speakers in pairs to each other and then connect one of each pair to an
amplifier channel output.
Connect the mixer or audio source to either the combo or RCA input sockets
With channel A+B levels down, switch the power on.
Gradually increase channel levels and check for sound from speakers.
If there is no sound, turn down channel levels, switch off and disconnect mains and check connections if front
panel PROTECT LEDs are lit, refer to qualified service personnel.
NO OUTPUT -
Check mains power is on and fuse is OK
Check leads and connections
Check PROTECT LEDs are not lit
Check speakers are working on another amplifier
DISTORTED OUTPUT -
Check the total speaker impedance is not below 4Ω per channel
Turn down the input level from audio source
Check audio source file being played is not distorted
Turn down channel gain controls
If protect mode is active, refer to qualified service personnel