Depends on the skills you have in regard to repairing motors. It's doable, but requires one to pay careful attention since motor is very small. For opening you first need to remove the pulley. Because it's brass, it needs to be heated (with the tip of a soldering iron) so metal expands. Forcing it up will damage the motor. Then the back plate needs to be de-crimped and removed together with rotor. Removing just the plate will damage the brushes. Same is true for re-assembly, these 2 must be put into the case as an assembly. If you have ever opened a big deck type motor, you will know how it's built. This is the same but much smaller. In regard to oiling, problem is the back bushing. Oil will never get there no matter how much you put on the front bearing. However in the front bearing you can add a bit more oil, as it's possible problem is only on the front. If you decide to pursue this motor repair, please take pictures and share them on the forum on a dedicated thread.
Yikes, that sounds quite risky. Thank you for the detailed description! I have opened and cleaned the motors on a Nakamichi DR-8, so I understand the basic concept. I think removing the brass pulley sounds like the trickiest part. I'll let the mechanism run for a bit more to see if it fixes itself, but I think you're right in saying that it's the back bearing. I will post pictures if I decide to pursue the motor disassembly. Thanks again!
Removing the brass pulley is the easiest part in my opinion. Heating it with a soldering iron will expand it enough so it will come off easily. Tricky part, in my opinion, is the disassembly of motor itself in a way that doesn't damage the brushes. Unfortunately it is possible the problem is on the back bearing given from has already been lubed and issue persists. Seen this (the back bearing problem) on JVC full logic walkmans that have a pretty similar motor, but on AIWA not aware of it being a common fault. But it's worth adding a bit more oil on the front bearing before drawing conclusions.
I have a problem with the speed of the tape, it seemed that it was only a clutch problem described here: https://stereo2go.com/forums/threads/aiwa-hs-p202-pc202-clutch-repair.8730/ but after repair I still can't set the correct speed. The adjustment works in the range from 1900 Hz to 2950 Hz only for a 3150 Hz cassette. There is no significant resistance to movement, the belt was changed , with a 2V power supply, the current is around 0.1A. What could be the cause?
A cracked clutch retainer won't cause speed issues, only decreased takeup torque. The 100mA current draw is with cassette in or without ? Manual doesn't have a spec for current, but 100mA with cassette in sounds in the right ballpark (although haven't measured a known good unit to know the exact value). What difference in current draw do you get between no cassette and cassette in ? Would expect it to drop by ~ 30% (30mA) without cassette.
This unit with cassette ~100mA without cassette ~80mA My best AIWA had ~95mA with cassette and ~60mA without cassette. I'm thinking about trying to set motor and governor matching resistors.
Update. After further checking it turns out that resistors R63 and R64 have a different value than manual. Manual is for version PC202mkII and not PC202mkIII but these values should not change.
