It must be an IR LED. I would choose this one: https://www.tme.eu/en/details/kp-2012sf4c/ir-leds/kingbright-electronic/ I think you must either...
BIAS ADJUSTMENT - You will need a function generator, digital audio player or computer. If using a DAP or computer sound card, it is necessary to...
RECORD LEVEL ADJUSTMENT - You will need a function generator, digital audio player or computer. If using a DAP or computer sound card, it is...
DOLBY LEVEL ADJUSTMENT - You will need either a digital oscillscope (an analog one with digital measurements will also work) or TrueRMS...
This is a complete step-by-step tutorial for how to adjust the Dolby levels, record levels and adjust the bias on your WM-D6 or WM-D6C. Applies to...
@Mighty Mightor Try what @Silver965 has suggested first. I assumed that the LED is working given the forward voltage drop it has when on, but...
You mentioned something about shorting the collector and emitter togeher and then the motor would run. Did I understand that correctly ?
Seems that strange thing was the pad underneath it. From what I can see, that's there to set the proper height of the sensor and hence the...
I have looked into the service manual, as I can't remember exactly how the connector looks. It is some time since I last repaired one of these....
I encourage you to repair it. However, if you decide not to do so, I am interested in buying it. With the volume turned at maximum, can you hear...
@Mighty Mightor Something indeed seems strange, but I cannot judge by a picture. You must make measurements to confirm that the phototransistor is...
Yes, I would resolder all 4 pins for good measure. And yes, solder on the back of the PCB.
Given the shipping conditions, try to resolder the connections of the sensor. But don't apply to much heat, as it is plastic and it's easy to...
@Mighty Mightor I have tested on my HS-PC202 MKIII and can tell that your problem is caused by that photo-detector. When I move the PCB away from...
The relay is a double pole double throw one, so it has both channels into a single relay. I've marked on the PCB layout what is the one you are...
Check to see if they are leaky first. The corrosion I see on the PCB is not on that area and it may not even be related to leaky capacitors....
Something that I immediately noticed in your picutres is corrosion on the PCB, possibly from leaked capacitors. Given your symptom, I would check...
The old SONY network walkmans have similar characteristics to your MPMan. For example, the SONY NW-E95 operates on a single AAA battery, powers...
@MisterX Very cool design ! I have found this ebay listing which states it uses a 5GB hard-drive: https://www.ebay.com/itm/265106381024 Seems...
I can try to guide you in finding what the problem is, but I need a little bit more info as I'm not familiar with this unit and cannot find a...
Separate names with a comma.
