Marantz CD63 & CD67 mods list

[Fidelity Audio]

The KI tx is connected up two ways, one way works on some pcbs and not on others. You will have continuity before the fuses as you are measuring the resistance of the transformer winding.

Measure DN01 02 03 04 for shorts also

Brent

[Fidelity Audio]

After that you need to check QM01 Q106 and Q105. One of these could have failed. Remove all the connections to the mech. Test again and see if it blows a fuse

Brent

[jimh0612]

Just found R851 and R854 are blown so will change these tonight and report back.

Cheers
Jim

[jimh0612]

not sure how to check the servo chips, but I can tell you it's blowing the fuses without any connections, just a naked pcb out of the chassis. DN diodes all ok.

Jim

[Fidelity Audio]

They are for the display control voltage (q851 854). 10K and 47K. This should not be causing you fuse blowing problem

Brent

[Fidelity Audio]

Pin 9 to 15 on all three chips are connected to the -ve rail, measure this on each chip to gnd.

Pin 2 is for +ve and measure this to gnd on each chip

Brent

[jimh0612]

OK thanks. Will try checking all the pins on the servo chips tonight. Do I need to check them all from each to ground or across each other - the combinations could be mindblowing!

Jim

[jimh0612]

Ooops - keep cross posting.

Need to get to work so will check that tonight.

Thanks for all the help - dunno what I'd do without you.

Aaaahhhhh!

Jim

[Fidelity Audio]

LOL

Yes all to gnd and then across the two. Make sure the fuses are removed

Brent

[delphiplasma]

Just been looking at that old debate, CD vs. Vinyl. The main bugbear with CD appears to be compression.

I was wondering how those Apple I pods compare, with their lossless audio format, which is suppose to be superior to CD. If you converted your Vinyl collection to this format, would that mean the IP is the next best thing to a turntable, rather than the CD?

Has CD had its day!!??