Marantz PM6005 Amplifier Repair (With Audio Tutorial)

Fault 1
Amplifier switching to protection mode.
High DC offset measured on the left channel, Q6027 - 2SA1266 found to have gone low Gain. (Component Tester Required)
Transistor replaced fixing the issue.
DC offset for the left and right channels set to 0 millivolts plus and minus.
3 millivolts.
Bias for each channel set to 20 millivolts.
Fault 2
Optical input socket damaged, replacement fitted part number JSR 2124.
Amplifier fully tested working correctly.

[@pabloosvaldopenizzotto1098]

Not an easy fault to find! Great job and great tutorial! Thank you

[@robertedmead3684]

Great video as always not a easy common fault to find with the leaky transistor many thanks for your time and effort.

[@robertedmead3684]

Hi Again. Just thought i would put this out there yesterday afternoon i finished working on a older style Rotel Amp RA-820 AX Where by when first run up there was no sound on one channel Turned out to be a O/C Resistor R635 .22ohm 2 watt on the center rail output to speaker but then found the original problem was a bias resistor on base of Q606 had gone open causing all the amp to unbalanced giving a 15 volt dc offset on the output . Replaced all components on both channels ran amp for 10 mins checked bias all ok. I apologize to the gentle of Audio Amp Servicing for putting this on his channel. Kind regards Robert

[@AudioAmplifierServicing]

Robert thank you for sharing your experience on the channel.

[@oldfatbastad6053]

I have the 5005 and its a great amp so i expect the 6005 to be just as good :)
Cant stand the new front facia design they have, yuck.

[@theaustralianconundrum]

Why on Earth would a 2014 build integrated from Marantz of this era go bad? 20 years is what we have come to? That's crazy as these were 300 quid at the time (2024 money = 460 quid in 2024. This is NOT cheap stuff and definitely reeks of built in selected low quality components to guarantee Marantz a nice new purchase just 20 years later. It's a disgrace.

[@oldfatbastad6053]

some time back AAS had an expensice cambridge audio amp(not that old) in and couldnt fix it due to non availibility of a part, 600quid piece oof scrap.