It's debatable if a cracked gear would fall under "For parts or not working" , since these units are actually producing sound even with a cracked...
Yes, with no tape inserted, EQ set to 70μs, Dolby C (so you have the lowest noise floor) start measuring the output of head preamp (emitter of...
National/Panasonic RQ-KJ1/WJ1/SJ1/J2 All of these units are identical apart from the outer casing. The devices use a flex-type double sided PCB...
Looks like the lever near is what pushes the lead swich, but it must sit lower for that to happen. The end marked X should go into the recess below.
To eliminate the possibility this crackling being motor hum, would desolder the motor and see if the problem goes away. Dolby IC is very...
Indeed check the sidecar on other walkman if possible. Also get a gumstick and check if the unit actually works. On these walkmans, corrosion on...
The term "static" is a bit generic, would be useful to describe in more detail: is it a hum, a crackling sound or just the noise floor of R...
Not sure if it's worth trying to repair that disc... Given there's quite a bit of force when clutch is slipping, chances are it will fail again....
That plastic membrane is part of the bushing, it's there to keep the motor shaft at the correct height. Don't know why on some motors it is made...
Cell phone chargers are indeed switchmode, have been like that for a very long time. @overmodulated Yes an unregulated power supply will have...
DC jack is a 2.1 x 5.5mm. For the PCB mount one you will have to find one with correct footprint.
You got the pinout wrong, see picture attached. Pinout is pretty much standard on SOT-23 transistors. Q302 is added in this circuit to boost the...
I would start with Vcc (pin 3 of IC301), which should be 2.25V with a 3V battery voltage. This voltage is generated by Q302 + internal circuit of...
Fact you have the same 0.55% in both directions is suggesting the geartrain is not the root cause of the problem. This is assuming the belt is...
If you should attempt to replace the belts yourself depends on your soldering skills as you need to remove the PCB in order to get to the belts....
@RedHackeT For uploading photos, keep in mind there is a size limit of 2000 x 1600 pixels and 10MB. In many instances you need to resize the...
Yes, usually autoreverse decks/walkmans don't obtain absolutely perfect frequency response on both sides. However, if the rollers alignment is...
Yes, of course a multimeter can be used to adjust/measure the tape speed. Only disadvantage is, of course, you won't see the W&F but just the...
If it outputs on line out fine, problem is related to the headphone amplifier. Would assume the volume potentiometer is working fine, changing...
The PC version is usually a lot less problematic than the P version in regard to leaky capacitors. Usually the PC version uses Nippon Chemicon...
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