not returning record after play

[sock]

ok so i swapped the chip and bingo it came to life had to the opto wheel to line up the pick up arm i also set the cam switches as per the manual, so this is where I'm at, input a record it scans finds the record and puts it on the turntable the tone arm then plays the track but at the end of the track the tone arm just stays there ive checked the end of play switch and it is making contact if i press the reject button it cuts the amp but the arm stays on the record let the button off and the amp comes back on the only way to end play is to flick the lever to scan then back to operate then it will lift the arm and put the record back in the drum and will then select the next record and play it ..sorry for the long post

[jukenorman]

Refer to sequence 17. I take it that the reversing relay is not energising when the record reject switch operates? The manual switch is just in parallel with the record reject switch. It would be my guess that micro switch 1 is faulty - simply because these are what normally give problems. So what to do is link it out (see the accompanying schematic to sequence 17), operate the reject switch and that will show whether the problem is the switch or the SCR circuit. You're nearly there!

PS - 4069 hex inverter chips are really cheap, you may as well sort out the hit tracker.

Norman.

[sock]

thanks Norman will check that out later when home ,it felt good yesterday when after 15 years asleep it played a record.

[sock]

ok so switch 1 was intermediate some times it worked so replaced with a spare that works
but im a little confused im not sure if the wires are on the right poles my schematic is not full size so hard to make out colour identification i have 2 mec boards and both are the same what i don't get is the end of play switch and the reject switch both kill the amp is it possible that there is a wire the wrong way round on switch 1 or 3 i'll have another look tomorrow it's fried my tired brain tonight but on the plus side i sorted the amp and it sounds nice regards keith

[jukenorman]

That's the 481 cam switches, they'll be wired the same.

[sock]

thanks Norman I will have another look at it later today

[sock]

ok so after checking the 4 micro switches checking all the wires from the 4 switches to the mec board checking caps on both mec boards this is what happens when I select a record the basket spins with the optp led flashing also the timer led flashing then the index led is on the record starts to play music led on so if I leave it playing with those 2 leds on when it comes to the end of play tone arm stays as before and record doesn't return but if while the record is playing I move the scan lever slowly towards off you hear the relay click and the index led is now off this doesn't interup the sound or stop the deck I then return the lever back to operate the record then plays to the end of the song and will then return the record to the basket and select the next record and play it .so when the record lands on the deck should the index led go out if so what controls that or is the logic board at fault?

[sock]

ok after reading another post about voltage at micro switch 1 while playing a record and with the index led on it 28.4 then still playing but after I do the trick with the scan lever it reads 33.4 so my power supply is good

[jukenorman]

You need to go back a step to sequence 16 - it'll be the latching relay that you are hearing clicking? You probably have an issue with micro switch 3, it's nearly always the micro switches lol!

Norman.

[sock]

I took all the switches off and tested them all tested ok. so when a record is playing what leds should be on ? I also with the power off tested the micro switches in home and wound the arm by hand until in playing a record position and following the schematic tested ok. so what is holding the relay on until I slide the scan lever until it clicks the relay off and turns the index led off? could it be something to do with the hex chip I swapped from the hit tracker? I have ordered some new hex chips ,if I can get this sorted I can start refevbing the cabin

[jukenorman]

Did you say you had a logic probe? If so, you need to do some checking at sequence 14 as to why the latch coil is remaining energised - it must be staying energised if the the index LED is lit. It's also very difficult second guessing what happens when you operate the scan switch. It could well be associated with the hex chip.

Norman.

[sock]

thanks Norman I was leaning to that answer aswell so once a record is on the turn table the index light should be off?

[jukenorman]

The manual explains it quite well and the associated schematics show the hot circuits. My understanding is that the latch coil of the latch relay energises at sequence 13 and the LED should illuminate - this is when the gripper motor starts. In sequence 14, micro switch 1 operates and there is some logic shown on the schematic to turn off transistor Q406 which then de-energises the latch coil at which point the index LED should go out. My guess is that you need to check this logic to determine why Q406 is not being turned off. Can I reiterate that the sequences in the manual guide you through the various stages very well.

Although to cause a bit of confusion, in my manual, the index LED is not shown lit in sequence 13 schematic when it should be.


Norman.

[sock]

my is the same that's why I was asking thanks again

[sock]

well Norman I've found the problem k401 and k403 are missing from the logic board they have been taken off do you know what the components are? I think i may get another logic board