It seems this D6C may have more than one problem: - the high pitched whining noise; given it's realted to removing the 2 ground screws, it's...
First of all, keep in mind you need to allow some time for the unit to stabilize (5-10 seconds) before reading the speed/W&F figure. In the first...
Now in practice brushed motors will last a very long time. But if a walkman is used like 5h a day, every day, the motor will eventually fail after...
Yes, as stated in previous post in phase --> 45 degree line, but: 1. You need a full track test tape (meaning recorded on mono head); 2. On such a...
Regarding Lissajous curves, there are many patterns depending on phase and frequency difference between 2 signals (in case of test tape there is...
Not sure I understand what you measured with the scope, are you reffering to azimuth ? XY 45 degree line means the channels are in phase. For...
The VU-meter peaking may be caused by imperfect contacts in the REC/PB switch. That should be cleaned. Also, has this unit been powered with...
Demagnetizing the head won't solve the lack of HF, as it's a problem that exists only on one side so it's a tape path problem. Head azimuth is...
Pinch roller backets simply pull up, but there is a bit of force required. Use a flat screwdriver underneath the bracket to pull the roller...
Rotation is transferred to the table reels through the big idler by touching the FG magnet part of the flywheel. But for that to happen, the...
For this application, you use the substance as-is, no need to dillute with water. Soak a cottom swab in it, put unit in FF or REW and keep the...
C102/202 are SMD tantalums on this models, these are on the other side of the PCB near head preamp IC. See picture attached. If you bought the kit...
Regarding the FF/REW, does the motor move at all when FF/REW buttons are pressed ? Is the motor position correctly adjusted (perpendicular to...
Muffled sound is not related to the caps. Failing caps would affect the other end of the spectrum (sub-bass), but even then they would have to be...
Looks like it. However these tantalum capacitors have higher ESR than electrolytics, that alone doesn't tell much. The unfortunate part is the...
The ATT switch is only related to MIC input. The thumping sound happends during record, playback or both ? Not working after re-assembly...
What's interesting is the motor works when powered separately. I would test the motor on a power supply and vary the voltage, maybe there's a dead...
These thin motors do look intimidating to open, but now that I see it opened realise the risk isn't that high. This is a coreless motor, similar...
In the video it's presented a motor that has the servo circuit built-in and it's that built-in servo making the motor run fast. A motor could...
Can you do a recording of the thumping sound ?
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