Does anyone here have a scanned copy of the schematics for NAD 3100???
I can get a hardcopy in January, but would like to see if I can fix these two amplifiers before 2003😉
I can get a hardcopy in January, but would like to see if I can fix these two amplifiers before 2003😉
I don`t think the relay`s have anything to do with this fault.
The amplifier goes in protection mode when I turn it on, and the green power led lights only for a couple seconds before it goes out again. The main power are up, +/-60 and +/-45V are ok.
The amplifier goes in protection mode when I turn it on, and the green power led lights only for a couple seconds before it goes out again. The main power are up, +/-60 and +/-45V are ok.
I'm afraid you're right, you're going to need the schematic.
When the relays go bad they click like normal when they pull in, but the sound is weak and sometimes distorted.
My guess is that your DC off-set is drifting, maybe some freeze-mist would help you find the problem.
When the relays go bad they click like normal when they pull in, but the sound is weak and sometimes distorted.
My guess is that your DC off-set is drifting, maybe some freeze-mist would help you find the problem.
I have removed the outputstage (both channels), but stil the amplifier goes in protection😕
I`m going to look more at it now, would really like to find the fault before the holliday is over
I`m going to look more at it now, would really like to find the fault before the holliday is over
Check the offset voltage and look at the output with the input shorted. If ok look for a defective component in the protection circuit.
Jam
Jam
Protection circuit
Hi!
Have you checked the protection-circuit in it self?
I once had a NAD 1300 Pre-amp, witch one day never wanted to turn on, the delay-circuit/relay driver was dead.
(I just removed the relay, and put in a pair jumpers).
Arne K
NORWAY
Hi!
Have you checked the protection-circuit in it self?
I once had a NAD 1300 Pre-amp, witch one day never wanted to turn on, the delay-circuit/relay driver was dead.
(I just removed the relay, and put in a pair jumpers).
Arne K
NORWAY
It`s working again!
Just a smal regulator (+18V) transistor that was blown.
One outputstage was also blown, but it was the defect +18V regulator that kept the protection on even without outputstage mounted...
Thanks for the input!
Just a smal regulator (+18V) transistor that was blown.
One outputstage was also blown, but it was the defect +18V regulator that kept the protection on even without outputstage mounted...
Thanks for the input!
Dear Sir,
Can you please send the schematic diagram of NAD 3100 to my e-mail address rd_bumagat@yahoo.com.ph. Thanks for the help.
Rey
Can you please send the schematic diagram of NAD 3100 to my e-mail address rd_bumagat@yahoo.com.ph. Thanks for the help.
Rey
NAD 3100 schematics
I have a silent NAD 3100, and no schematics. Anyone who have got this precious documentation? Many thanks in advance. Bernhard
I have a silent NAD 3100, and no schematics. Anyone who have got this precious documentation? Many thanks in advance. Bernhard
NAD 3100 schematics
I recently bought a repair manual with full schematics from
Mike Thomason [mike@vintageaudiomanuals.com]
The price was very reasonable (approx $21). It arrived within 2 weeks
I recently bought a repair manual with full schematics from
Mike Thomason [mike@vintageaudiomanuals.com]
The price was very reasonable (approx $21). It arrived within 2 weeks
nad 3100 schematic
hi.got a wierd one to fix so need schematic if you can help.can't measure any shorts. nothing burnt.one of the lt caps has exactly the same voltage as the ht cap.more than it should be able to stand.but it measures ok and is not hot or fizzing as you would expect ??? nigel77@hotmail.co.uk
hi.got a wierd one to fix so need schematic if you can help.can't measure any shorts. nothing burnt.one of the lt caps has exactly the same voltage as the ht cap.more than it should be able to stand.but it measures ok and is not hot or fizzing as you would expect ??? nigel77@hotmail.co.uk
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