Sony D6 Playing Fast and No Sound

It seems that whomever tinkered with this before forgot to put the little metal lever back into its slot, the one that's triggered by the play button. I think they also assembled the clutch gear assembly wrong, I had to flip the little spring in there. After putting those back to their places, the machine runs much happier, as am I. Now, onwards to LEDs! Thanks again, Deb, for troubleshooting and providing so much support and information!

 

Just finished checking the chip, I am getting 5.97V, on pin 8, not quite 6V. Also no power on pin 9 what so ever. As for the other pins that needs 2.1, I get 1.9 instead. Is this a damaged chip?

 

Glad to hear that you have the take up spool drive sorted out.
Regarding the LEDS, I would check that you have 0V on pins 6 and 7 of the TA7654P chip. If you have then I think the most likely problem is the chip.

 

Thanks for the hastly reply, Deb, really appreciate it. I think I tested the voltage wrong previously with my meter?(I'm not sure) Sorry, im still a bit new when it comes to using a multimeter.

Here are my new readings: When I have the red probe touching the red wire right under the chip, and black probe touching the pins, i get 5.9V on all the pins except pin 8 to 13. On pin 9 there are 0.2V present. If I used my meter wrong again please let me know how I can use it properly, apologies and thank you.

 

The voltages shown in the service manual are all referenced to OV or ground. You need to connect the black probe (meter ground) to OV on the walkman. On the meter board, this is where the black wire connects to the board next to pin 7 of the TA7654P. Then use the red probe to measure the voltages on the other pins of the chip.

 

Thanks for the reply Deb. Seems like I did it right the first time around. I was a bit confused as you mentioned to check for voltages on pin 6 or 7, when I have ground pin already on pin 7. So I assumed I did something wrong. Maybe I misunderstood your meaning when you asked for voltages on pins 6 and 7; did you mean to connect the probes to pin 6 and 7 or separate readings for both pins? If you meant the first then the reading is 0V. Thanks.

 

I would check both pins separately, just in case you have a cracked PCB track or a dry solder joint. They are unlikely but not impossible.