These amps sometimes used the npn pairs in the output stage if you look at stingray amps there the same.
Have you tried cold checking all the...
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laney GH 100l
Hello to all.
I was given a Laney GH100l to check over as it's sounding a little odd..seems to ring out on e 6th string..plus it's been to a...
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It would seem post one still has faults with the amp. Some more voltages need checking out. Even look over oc tracks as been pointed out. The ht 45v +/-...
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Hello to all,
I've had one of these amps on the bench today with the same humm..after looking over the circuit it reminded me of a trace elliott...
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macro-tech 3600vz
Hi all,
I've a faulty crown 3600vz with non powering up problem, first left channel went down found shorted to-3 say about 4 and .47 ohm resistors...
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If you look at the low rail voltage regs check these for open Circuit.
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welcome to the show ....these amp's take time to work on as there are no ref points on the pcb and rail volts are 80+/- and give nasty shock's be careful...Last edited by plec.22; 06-18-2015, 10:30 AM.
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music man 210-hd
My friend brought this amp from on line site...with seller's notice work's great but needs looked at!!
He did try a new fuse but no luck, ok...
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One way to solve amplifier fault such as this one, is not to pop replacement parts in and power up but to use it's work channel to check input circuits followed...
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Hi all, I've the older lx7 with channel 9 and 10 not working with sound trying to get through, it's distorted.. at first thinking it's the classic fader...
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Vibrato Non working with this amp..Just to ad on this topic,,, after checking things out, I found a 470 ohm gone High in the reverb Part its value reading...
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kam kk400 amplifier..
Kam kk400 karaoke amplifier..china amps..
This one would power up but had no audio out fault plus there's not much in the way of schematic...
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Thank you for schematics Jazz bass, it makes things clear to see what's going on instead of cold checking the 'see it on the board parts'...it's still on...
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More checking last night found over heated 10k resistor within psu..fets ok...Just need schematic to see whats going on here...
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I did solve the main fault's in the end...repair to preamp supply plus a few safety resistors in the fx pcb board.
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was thinking psu main caps, but will remove heatsink and look over the pcb.
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same fault as above on pro12...o/p fets no shorts there how ever the unit will quick power up then off.
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that's what is trying to do..quick power then fades off...thanks for the schematic on the 15..
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wharfendale titan pro 12.. wont power up..
Hello all..I've got a non powering titan pro 12... It trys with quick flash of the led that's about it. I/p fets are ok no other shorts found...does anyone...
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It takes lots of service time to check this unit out...stick the coffee on...
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