Akai 1710w schematic question

[ledzurso]

I am refurbishing the amp section of this unit. I have replaced the electrolytics and some key power resistors. I have come across one resistor that reads 6.8k (blue, grey, red) but the schematic says 68k (resistor 19).



Can anyone confirm which resistor value that should be?

Also, any other advice about what this unit needs would be much appreciated. It's a working unit. I've cleaned the transport, replaced the A/C cord, as well as all the caps in the rats nest of a layout. I would really love to have a perf board made up for this unit; how nice would that be!



Thank you for your help!

-Kevin

 

[arcaxis]

Parts list shows a 6.8KΩ 1/4w (R19) which I would tend to agree with.

33,000Ω(R20) + 6,800Ω(R19) = 39800Ω

Current through R20 + R19 = 250v / 39800Ω = 6.28ma

Voltage across the 6800kΩ (R19) with 6.28ma flowing through it = 6800Ω x 6.28ma = 42v, which is just a bit higher than the 33v denoted on the schematic. The load of the circuit this voltage divider supplies would maybe bring it down closer to 33 volts.
A resistor of 68kΩ would not give a voltage division needed.

 

[ledzurso]

Parts list shows a 6.8KΩ 1/4w (R19) which I would tend to agree with.

Parts list! Good thinking! That didn't cross my mind. Yes!! thank you so much!