Assuming the unit works perfectly in both playback and record ? Can the bias be set to match input/output levels at 10kHz ? Would also be...
It's hard to point out what the exact problem could be. Something as simple as corrosion inside the FWD/REV switch creating a small parasitic...
The pulley that drives the geartrain on AR90 mechanisms existed both in brass and plastic versions depending on model and generation. In my...
Flutter can be from many things, including (but not limited to): a loose belt, unstable tape path at the capstan/roller due to improper alignment,...
In regard to auto-stop making noise, double check the black lever is installed inside the plastic slider as shown in picture attached. Ignore the...
HF response limitation is from the head, specifically how fine the gap is. Electronics have HF response that goes significantly above 20kHz. In...
What about the recording itself ? Does the unit record correctly or not ? You can see the signal path splits into 3 (red - VU-meter section,...
Have the impression seen this fault before, but can't remember what the problem was (will update if I do). Suggestion is to check if you can...
This wasn't a good idea in my opinion. Unless the unit was dropped, there's little reason to suspect the trimpots moved by themselves causing the...
Something seems off. Assuming the same WLA-PBD1 tape was used to calibrate both the known-good recorder and this deck, the tape itself shouldn't...
If it's that long thin type, you're not going to find a replacement in the same footprint. Solution is to replace with SMD tantalum instead....
Part 121 looks like a shim to adjust erase head height or a cable holder. Would assume you didn't remove the erase head, so your washer is likely...
Hello and welcome to the forum, @Sonny Foster ! Always nice to see people into vintage electronics restorations, especially walkmans. Feel free...
First thing I would check are the output coupling capacitors C118/C218, this symptom is typical of coupling caps that have very high impedance....
Fact you need to turn the trimpots close to the max setting to get the desired value indicates something is wrong. There are a couple of things...
Keep in mind that brown thing on the transformer is glue, not damage. T1 is part of a DC-DC converter circuit (+7.8V) that powers the servo PLL....
Yes the bushings are replaceable, but I highly doubt there are many who actually have the right tools to replace them. Not to mention the spare...
W&F obtainable on these units will depend a lot on capstan bearing wear and can vary anywhere between 0.15% WRMS (a best case scenario) to 0.30%...
Ok, so connect the + side of the head coils input to the COM. But make sure you only use the unit in PLAY this way, not record, as in record...
Hello and welcome to the forum, @TheLagster30 ! Glad to see a skilled technician joining the forum. There are a few of us here that do repairs...
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