problem with Marantz amp PM-80SE

Crecencio · 5th June 2005, 04:07 PM

I am trying to repair a Marantz PM-80SE no output.
Does anyone have a service manual of this amplifier?
I already did some measurements open and check transistors
Caps resistors voltages supply rails. Seem look okay. But no quiscent current bias not working output device doesn’t warm-up
Replaced STK 3102 IV by an STK 3102 III but no change. IV III stands for what? Are these upgrade versions, datasheet pin out are same. Any help is greatly appreciated.

Thanks
Crecencio

Netlist · 5th June 2005, 05:09 PM

Where did you find the datasheets? I'm too lazy at the moment to search.

As for the amp, try looking for burned safety resistors.

/Hugo

5th June 2005, 04:07 PM	#1
Crecencio diyAudio Member Join Date: Apr 2005 Location: India Goa	problem with Marantz amp PM-80SE I am trying to repair a Marantz PM-80SE no output. Does anyone have a service manual of this amplifier? I already did some measurements open and check transistors Caps resistors voltages supply rails. Seem look okay. But no quiscent current bias not working output device doesn’t warm-up Replaced STK 3102 IV by an STK 3102 III but no change. IV III stands for what? Are these upgrade versions, datasheet pin out are same. Any help is greatly appreciated. Thanks Crecencio

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5th June 2005, 05:09 PM	#2
Netlist diyAudio Moderator Join Date: Jan 2003	Where did you find the datasheets? I'm too lazy at the moment to search. As for the amp, try looking for burned safety resistors. /Hugo

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