Hi All,
It has been 3 year since the last post on this thread, I have a PM66 KI that has been in storage for a few years now, I have own this thing for 20+ year now. On turning it on I do not get the click I am sure was there before.
I don't current have any speaker available to attach to it but i presume there will be no output. Headphones have output but only on both left and right channels when in direct mode. (Without direct mode on the left channel works)
I am confident I can fix the output issue from this thread, However I would also like to try some of the tweaks, assuming I get the output working again.
I have scan read most of the pages in the thread, but could do with a summing up of the question below from those in the know.
1: Is it worth it considering its age and who hard it may be to find component mentioned now?
2: If people can remember, which tweaks gave the best results in terms of sound.
3: which are the easiest to do I am not a electronic expert, but can solder, own a decent multi meter and can follow instructions? (Mostly)
Thanks In Advance
Martin
It has been 3 year since the last post on this thread, I have a PM66 KI that has been in storage for a few years now, I have own this thing for 20+ year now. On turning it on I do not get the click I am sure was there before.
I don't current have any speaker available to attach to it but i presume there will be no output. Headphones have output but only on both left and right channels when in direct mode. (Without direct mode on the left channel works)
I am confident I can fix the output issue from this thread, However I would also like to try some of the tweaks, assuming I get the output working again.
I have scan read most of the pages in the thread, but could do with a summing up of the question below from those in the know.
1: Is it worth it considering its age and who hard it may be to find component mentioned now?
2: If people can remember, which tweaks gave the best results in terms of sound.
3: which are the easiest to do I am not a electronic expert, but can solder, own a decent multi meter and can follow instructions? (Mostly)
Thanks In Advance
Martin
Good day to all.
I am naive in electronic board lecel. Only know how to do simple solder desolder works.
I know it is an old thread. But I am seeking advice to rescue my old pm66se KI.
The amp been idle for too long, recent power up found:
1. Source direct switch when disengage got distorted noise both L&R speaker.
2. Right channel is louder than Left channel even when source direct is enable.
I wish to solve the issue with options
A. Replace the source direct switch
B. Replace the balance switch
C. Or Bypass both A&B
Do you guys know where can I find parts for option A&B?
Can you guys teach me with diagram how can I jumping wires to do the option C?
What is the possible reason caused R ch louder even when source direct is engaged?
Thanks guys for helping me in advance ya.. 🙂
I am naive in electronic board lecel. Only know how to do simple solder desolder works.
I know it is an old thread. But I am seeking advice to rescue my old pm66se KI.
The amp been idle for too long, recent power up found:
1. Source direct switch when disengage got distorted noise both L&R speaker.
2. Right channel is louder than Left channel even when source direct is enable.
I wish to solve the issue with options
A. Replace the source direct switch
B. Replace the balance switch
C. Or Bypass both A&B
Do you guys know where can I find parts for option A&B?
Can you guys teach me with diagram how can I jumping wires to do the option C?
What is the possible reason caused R ch louder even when source direct is engaged?
Thanks guys for helping me in advance ya.. 🙂
Last edited:
Hi compact7,
Clean the switches, replace speaker relays. Beyond that , do not touch it. Don't short switches. If you aren't practiced or understand something, stop. Get someone who is to fix it.
Do not "recap" the unit.
Clean the switches, replace speaker relays. Beyond that , do not touch it. Don't short switches. If you aren't practiced or understand something, stop. Get someone who is to fix it.
Do not "recap" the unit.
Hi anatech,
Thanks for your reply. Appreciate.
It eventually cured by itself. Maybe caps inside had stabled.
Thanks for your reply. Appreciate.
It eventually cured by itself. Maybe caps inside had stabled.
I'm glad it is working. Capacitors don't stabilize, they get worse over time. Never better. Bad solder connections may have the oxides broken by movement and things like that. Switch contacts (& relays) are designed to clean during operation, so that is another possibility.