Does anyone know where I can get a circuit and repair manual for this amp? One channels gone so need the power out tranny numbers🙁
Thanks for replying Andrew I have done that and it appears to be faulty power output transistors due to a resistorr going high, Musical fidelity like other manufacturers have put thier own numbers on them so I dont know the real numbers to get some replacements or to see if thier even still available nowadays a headache for people like me who like the retro sound also to replace the amp would cost a fortune for a new equivalent
MUSICAL-FIDELITY ELEKTRA E100 SCH Service Manual download, schematics, eeprom, repair info for electronics experts
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Output devices are listed as F15N & F15P - Custom Musical Fidelity numbers, so unfortunately some more investigation will be required!
A google search seems to suggest that a decent T03 bipolar transistor pair should do the job.
Wait for the text saying This file is downloadable free of charge: ...processing... to change to Get Manual & then click on that text.
Output devices are listed as F15N & F15P - Custom Musical Fidelity numbers, so unfortunately some more investigation will be required!
A google search seems to suggest that a decent T03 bipolar transistor pair should do the job.
the resistor going high does not damage the output transistors. If anything the higher resistance value would try to protect the output transistors.
It probably happened the other way around.
Someone abused the amplifier to force it to attempt to deliver excessive current and that overheated the output transistors. One or more may have shorted as a result of that abuse and the shorted transistor then connected the supply rail direct to the resistor which then gave up after the abusive incident.
Unfortunately a damaged output transistor often takes out the driver transistors and occasionally takes out the stage before that.
You need to check the circuit AFTER you have removed the output transistors using a high resistance temporary load and reconnect the feedback from that temporary load to the input.
It probably happened the other way around.
Someone abused the amplifier to force it to attempt to deliver excessive current and that overheated the output transistors. One or more may have shorted as a result of that abuse and the shorted transistor then connected the supply rail direct to the resistor which then gave up after the abusive incident.
Unfortunately a damaged output transistor often takes out the driver transistors and occasionally takes out the stage before that.
You need to check the circuit AFTER you have removed the output transistors using a high resistance temporary load and reconnect the feedback from that temporary load to the input.
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