I have been tasked with getting a friends D6C working correctly again. So far I've changed the belts and the flywheel rubber, so it plays fine, but I have a grey wire lose inside the case, I'm pretty sure I've traced where it goes but would like to be 100% certain. It comes from the corner of the board near the headphone jacks from the other side of the board, I've soldered it where I think it goes but doesn't seem to make any difference with how the unit sounds. I have the service manual, and looking at the diagrams I think I know where it goes, but the scans of the manual I have aren't all that clear, so if anyone has a photo of the board without the black tape on it, I'd love to see it! I'll try and post a pic later of where the wire is and where I've been connecting it too when I get home later. The other problem is a bit weird and I guess may be related to the above problem, I've noticed that playback is fine with the speed control switch set to the on position, speed adjusts up and down just fine, but switch it off and the sound is 'wobbly' at best. I'm hoping the problem is related to the grey wire described above, but its guesswork at best! Anyone have any ideas? Thanks in advance Martin
I could not find any grey wires jumping the board next to h/p connectors, and then realized that mine is D6, not D6C. Here is D6 photo before restoration: D6C went through quite a few "upgrades" with the first ones looking like D6, then like this: and finally like this (these two photos got "borrowed" from the tapeheads thread): And then there was Light!... sorry, iPod!!! So... unless you post the photo of your D6C folks won't know what to look for
I'm still trying to get some photos off my phone but as I've just upgraded it to an S9, its not 'talking' to my PC at the moment (d'oh!) The wires are on the reverse of the pics you have posted, but I guess the D6 may be different to the D6C. I have soldered the wire back on where I think it goes but its still the same, so still no idea why it does what it does. Thanks for the pics tho, always fascinated by seeing stuff like that!
I'm not sure which version D6C you have but here is the PCB layout for the early 1984 version: WM-D6C 1984 PCB Layout
Wow thanks Deb64! When I can get my phone to play ball with my pc I'll post up some images which will hopefully help. I think its a later version with more surface-mount components, but I don't know how you actually identify which version it is!
Right, a couple of images of the cable and where I've soldered it to. I've studied the wiring diagram til I'm blue in the face and this is where it looks like it goes to, doesn't affect its operation whether its attached or not! Shown with the white arrows....
I think the grey wire is the one which connects from the tape type switch (Norm, CrO2, Metal) on the LED board to pin 2 of the CP302 record EQ switching module. This won't affect the sound on playback but will make a difference to the equalisation when recording. The wire is shown as No.8 on the layout diagram. This wire is nothing to do with the motor drive circuitry. Unfortunately the speed stability problem not something which I can diagnose remotely. I would need to hear the problem and check through the circuit with an oscilloscope. If you would like me to take a look at it, please PM me.
Hi Debs, thanks for your reply. I'm at a stage where I want to throw this thing now. After replacing all the rubbers inside and it working and playing tapes fine, I went to test it the other night and its back to how it was when I was given it to fix! At first it showed no signs of life, checked the batteries they were fine, now it occasionally plays tapes albeit badly. Sometimes the motor doesn't even spin yet the battery light comes on. I think I need to send this away to someone as its a bit beyond me now and I'm losing the will!
check my thread my unit was working perfectly fine after some time not in use i was play some tapes and i noticed that vibration was there and now a wobble sound,even the same grey wire was disconnect maybe because the wire holding tape.work fine dow with speed trimmer on,i suspect now crystal oscillator X701 http://stereo2go.com/forums/threads/wm-d6c-buzzing-problem.2797/
