Hi all
I have problem with a PV2600 and i caused it
peavey_pv-2600.pdf
came in for a funny noise from Channel B.. I sorted that by some resoldering. tested it all working, when i screwed it up i didnt see that i had cabled tied the voltage supply cables to channel A a little close to the heatsink. When i screwed the cover on i had pinched the orange cable (LRVB2) 57v+ and it cut into the heatsink
Turned the unit on and a bang. I repaired the cable check and turn on again tripping the safety. On investigation found one of the 2sa1943 s/c and one of the RFZ44 s/c on channel A
nothing else had gone. I replaced and turned on, without a lamp limiter ( broken ) same thing again
so i checked everything this time and too be sure i replaced every semiconductor on the heatsink. inc 2sc4793 and 2sa1837
Checked all resistors found nothing open Checked all diodes all seems ok. There are no s/c across the outputs for speakers
Have check all semi's on channel B all ok no shorts
With both boards in and connected turn on the lamp limiter ( 100watt bulb) pulses then it settles down with both DDT led's lite up and the green power led's pulsing
Lamp limiter is staying dimm and not pulsing sometimes the signal led will come on for channel B
Advice on anything i can check before i plug into the mains supply
BBB
I have problem with a PV2600 and i caused it
peavey_pv-2600.pdf
came in for a funny noise from Channel B.. I sorted that by some resoldering. tested it all working, when i screwed it up i didnt see that i had cabled tied the voltage supply cables to channel A a little close to the heatsink. When i screwed the cover on i had pinched the orange cable (LRVB2) 57v+ and it cut into the heatsink
Turned the unit on and a bang. I repaired the cable check and turn on again tripping the safety. On investigation found one of the 2sa1943 s/c and one of the RFZ44 s/c on channel A
nothing else had gone. I replaced and turned on, without a lamp limiter ( broken ) same thing again
so i checked everything this time and too be sure i replaced every semiconductor on the heatsink. inc 2sc4793 and 2sa1837
Checked all resistors found nothing open Checked all diodes all seems ok. There are no s/c across the outputs for speakers
Have check all semi's on channel B all ok no shorts
With both boards in and connected turn on the lamp limiter ( 100watt bulb) pulses then it settles down with both DDT led's lite up and the green power led's pulsing
Lamp limiter is staying dimm and not pulsing sometimes the signal led will come on for channel B
Advice on anything i can check before i plug into the mains supply
BBB
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