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Walkman wm-fx28 won't play tapes

It was playing fine, then in the time it took to switch out tapes, it stopped playing

Posted by Anonymous on

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Sony Walkman WM-D6C

If your WM-D6C has a serial number below 267201 (take out the battery block and you'll see the serial number sticker there) then the problem is electronic, not mechanical. It is likely due to the speed controller chip (labeled as IC601 on the circuit board), which is made by Sony and is type CX20084. This chip decides the voltage that is fed to the motor which is only about 2.4 volts, Should the chip be defective then the motor receives about twice this voltage and thus runs too fast. If you take the back off the recorder you will see the circuit board; it looks like a rectangle with a small square extra bit sticking out to the right. It is here that the IC601 resides. It is about the size of a small pinky finger nail and has 8 tiny legs down each side. Measure the voltage on pin 15 (put one voltmeter probe (+) on the second leg down on the right side (pin 15) and the other one (-) on the battery negative), it should read about 4.8 volts, which it feeds into the base of transistor (Q601) that in turn will then feed 2.4 volts to the motor (if everything is working OK). If the chip is damaged, then the voltage on pin 15 will be close to zero, and the transistor Q601 will not be "held back" and so will feed about 5 volts to the motor. CX20084 is (unfortunately) obsolete, someone in the UK sells them for about $50, but an excellent company in Hong Kong (utsource.net) sells them for $5 (plus $8 S&H). Taking out the old chip and putting in a new one is close to microsurgery, you will need a micro soldering iron (18Watt Antex), a good eye, a powerful magnifying glass and a steady hand, but it can be done - I've done it! There is a possible second reason that could cause the motor to run too fast. There is a pick up coil on the main flywheel called FG901. If this is damaged it will be open circuit and then the only use for your recorder is probably a paper weight. You can test this by going back to chip IC601 and locating pin 1 (top left pin; a small circle on the body of the chip is next to pin 1), Pin 1 is connected to the positive side of a capacitor,  C602 (0.47 microF), check the resistance from the negative side of C602 to the ground (take battery out, and use battery (-) as ground). You should get about 600 - 650 ohms reading. If you get nothing, sorry there is not much you can do about it as these pick up coils are definitely not available. Finally, chip 601 (CX20084) goes bad if you connect the batteries back to front. Good luck. Giles..

Posted on Jan 16, 2009

  • 11 Answers

SOURCE: Sony Walkman cassette player/recorder will not rewind the tape

Fat chance to repair yourself! we repair that WmD6c but very hard to do!

Posted on Feb 26, 2009

caroldon
  • 17129 Answers

SOURCE: I have a sony walkman WM-3. It suddenly stopped

Please check for the belts if the battery you have installed is new and the set gives a hum on play. If not you will have to check the power switch, the mechanism switch and the line to the main board.
If the motor turns but not the capstan and the reel then change the belt, the rollers or the pulley. I hope this will get your set back to action. Good day

Posted on Jul 21, 2010

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2 Answers

I have a sony walkman WM-3. It suddenly stopped playing. Do you do repairs ?


Please check for the belts if the battery you have installed is new and the set gives a hum on play. If not you will have to check the power switch, the mechanism switch and the line to the main board.
If the motor turns but not the capstan and the reel then change the belt, the rollers or the pulley. I hope this will get your set back to action. Good day

Jul 19, 2010 | Sony Walkman WM-D6C Personal Cassette...

1 Answer

It wont play tapes


If the walkman comes on but just wont play tapes then more offten then not the belt has broken or clutch has worn out and will have to be replaced.
you will have to open the walkman up in order to do it, you can get a new belt from any electronics parts supply store (not radioshack) there usualy around $1 and are easy to put on.

Jul 19, 2009 | Sony Walkman WM-FS399 Personal Cassette...

1 Answer

Tape speed distorts and slows


motor belts are cheap. try replacing the belt that drives the wheel. this become distorted specially when the unit has not been use for quit long time. if you think its not about belt, clean up the rubber that touches the tape when played, also the tape head with 70% alcohol. hope this help.

Mar 24, 2009 | Sony Walkman WM-FX290 Personal Cassette...

2 Answers

Sony Walkman cassette player/recorder will not rewind the tape


Fat chance to repair yourself! we repair that WmD6c but very hard to do!

Feb 23, 2009 | Sony Walkman WM-D6C Personal Cassette...

1 Answer

Motor is ALWAYS running on this thing?


No not normal motor shuts off when not in play or other drive functions! we repair that model! want to sell it?

Nov 11, 2008 | Sony Walkman WM-D6C Personal Cassette...

2 Answers

Plays too fast


WMD6C has a pitch control on the back of the unit that can change the speed of the tape, so switch it off, but if that is not the problem then inside the unit it has a servo set speed pot on the main board.
Dave, Electronic Doctors email eledocs@hotmail.com

Nov 08, 2008 | Sony Walkman WM-D6C Personal Cassette...

1 Answer

Tape witll not play


your tape player may be jammed up and not playing your cass.

Jul 04, 2007 | Sony Walkman WM-FS593 Personal Cassette...

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