This cassette deck was working with no problems but has very recently developed a very high pitched whine and the two meters go off the scale when playing any tape. The sound via a Cambridge Audio amplifier is very muffled.
I've repaired/restored many valve radios, transistor sets, turntables and various bits of hi-fi but this make and model is new to me?
Anyone recognise these symptoms and give me a heads up on where to start looking for the source of the problem?
I've repaired/restored many valve radios, transistor sets, turntables and various bits of hi-fi but this make and model is new to me?
Anyone recognise these symptoms and give me a heads up on where to start looking for the source of the problem?
No experience with this machine, but I have seen similar symptoms in others caused by poor contacts in the multi-pole record/play switch. Maybe try flushing that very well with D5 to test the possibility.
All good fortune,
Chris
All good fortune,
Chris
Somewhat to my amazement a few squirts of Servisol Super 10 seems to have helped with my problem!
Just a few outstanding issues though:-
1. The usual background hum is annoying - any known fixes?
2. The Record button won't stay pressed down?
3. These three plastic fixtures fell out when I opened the case - what are they and where should they go: -
Just a few outstanding issues though:-
1. The usual background hum is annoying - any known fixes?
2. The Record button won't stay pressed down?
3. These three plastic fixtures fell out when I opened the case - what are they and where should they go: -
2. Put in a cassette tape, press and hold rec. & press play in that order. Does it stay down now??
I wonder if those nylon parts were all part of some assembly that has sprung apart. In post #1 you mention it had all been working though. Could they be part of a damping mechanism on the cassette door assuming it has one?
Thanks for your reply but that’s what I was doing - unfortunately still not staying down? Don’t want to force it but it feels as if the mechanism is jammed somewhere?
Thanks Mooly - that’s my instinctive response. The Eject function works but is very fast with no damping so you may be on the right lines?
I bought the cassette player a couple of years ago and it worked fine for playing tapes but I never tried using the Record function.
I have the schematic but not the user manual which I think includes a full exploded view of all parts.
Thanks for looking Mooly.
I watched this short YouTube video and at around 0.30 the EJECT function seems to behave exactly like mine so this may not be where the nylon parts came from?
As the RECORD button doesn't work I think that this may be where I should be concentrating my efforts? There are several links and a metal rod between the RECORD button switch that extend over to the main circuit board - these remind me of the auto-changer mechanisms on Dansettes and similar turntables?
Don't want to start any serious disassembly until I know what I'm looking for so can anyone help explain how the RECORD function works as I'm assuming (hoping) that it simply operates a switch and it's not unique to Sanyos?
I watched this short YouTube video and at around 0.30 the EJECT function seems to behave exactly like mine so this may not be where the nylon parts came from?
As the RECORD button doesn't work I think that this may be where I should be concentrating my efforts? There are several links and a metal rod between the RECORD button switch that extend over to the main circuit board - these remind me of the auto-changer mechanisms on Dansettes and similar turntables?
Don't want to start any serious disassembly until I know what I'm looking for so can anyone help explain how the RECORD function works as I'm assuming (hoping) that it simply operates a switch and it's not unique to Sanyos?
That lid is a bit twangy. Maybe it predates niceties like damped mechs and so on.
The record button normally just mechanically presses and locks/latches in place with the 'Stop' button being able to unlatch it. You haven't got the record prevention tab knocked out of the cassette shell have you?
The button simply operates the record play switch/switches to turn the bias oscillator on and to swap all the signal paths around from play to record mode, but mechanically it is a simple lock/unlock action.
The record button normally just mechanically presses and locks/latches in place with the 'Stop' button being able to unlatch it. You haven't got the record prevention tab knocked out of the cassette shell have you?
The button simply operates the record play switch/switches to turn the bias oscillator on and to swap all the signal paths around from play to record mode, but mechanically it is a simple lock/unlock action.
Thanks the feedback and advice regarding the RECORD functionality, most helpful.
I’m using a new blank cassette so knock out tabs still in place?
I’m putting this back on the shelf meantime as I have some other jobs to attend to but will revisit this at the earliest opportunity - PAUSE button pressed.
I’m using a new blank cassette so knock out tabs still in place?
I’m putting this back on the shelf meantime as I have some other jobs to attend to but will revisit this at the earliest opportunity - PAUSE button pressed.
My instincts are still telling me that there is something not quite right with the RECORD mechanism that extends over to the switch on the main board. Some disassembly will be required but I don't have time to look at that just now - maybe later next week.
Meantime if anyone discovers where the nylon parts came from I'd be very appreciative.
Meantime if anyone discovers where the nylon parts came from I'd be very appreciative.
Just a very quick update (before this Sanyo cassette deck goes back on the shelf) to provide some additional information about the nylon parts - what I hadn't noticed before was that on one side of each part there is lettering which reads 'TAKE OUT'.
So could these just be spacers or similar used when transporting the cassette deck which have fallen into the inside of the case at some point - just guessing but hope that helps resolve the mystery?
So could these just be spacers or similar used when transporting the cassette deck which have fallen into the inside of the case at some point - just guessing but hope that helps resolve the mystery?
Could be a few things. One could be, that one of the rods connected to the record button also have the lock-mechanical function,
and the grease between rod and chassis has hardened over time, so the "lock" stays open??
If so, proper cleaning and re-greasing will do the trick 😉
It's been a while since this Sanyo cassette deck gave me any problems but only recently (?) I've noticed that when trying to RECORD only one channel is working. Both Meters are working as they deflect during normal Play?
Don't know if it's a recurrence of the problem with the multipole 'record/play switches' or an issue with part of the RECORD circuit?
Don't know if it's a recurrence of the problem with the multipole 'record/play switches' or an issue with part of the RECORD circuit?
It is quite possible to be R/P switch related. A way to get an idea might be to manually move the switch to and fro while recoding and then see if the playback of the tape comes through OK at any points.
Do not do this with a tape that has anything you wish to keep as the bias oscillator (erase) will come on each time you move it.
Beyond that it is signal tracing with a scope and known input signal I'm afraid. Likely the switch though at this point.
Do not do this with a tape that has anything you wish to keep as the bias oscillator (erase) will come on each time you move it.
Beyond that it is signal tracing with a scope and known input signal I'm afraid. Likely the switch though at this point.
Thanks Mooly for confirming my suspicions regarding the multipole 'record/play switches' - as you say, seems likely?
Won't be able to look at this until next week due to other priorities.
Won't be able to look at this until next week due to other priorities.