INDEX
26
QUATTROCANALI | SERVICE MANUAL
7. Troubleshooting
7.1 Testing the Amplifier with DC Power
Connect the Amplier to an external DC Power Supply.
Slowly increase the voltage to 60Vdc.
Check if the Absorption is within the limits
450mA (±10%) @ 60Vdc
Check the front panel LEDs for normal operation.
7.2 Internal LEDs Checks - Power Supply Section - Normal Operating Conditions
Colour Status LED Action
GREEN*
ON +RAIL None
GREEN*
ON -RAIL None
OFF +RAIL
Check Standby LED
Troubleshooting table Point 7
OFF -RAIL
Check Standby LED
Troubleshooting table -
Points 7, 13, 16 ,17
Main Board PSU Section Main Board
Colour Status LED Action
GREEN
ON PG None
GREEN
ON -15 None
GREEN
ON +15 None
OFF/
BLINKING
PG
Check Standby LED
Troubleshooting table -
Points 7, 13
* The luminisity of these 2 LEDs is dimmed when the amplifier is in “Idle” mode.
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