WTD: Heath 10D-203-3 Oscilloscope schematics

[Frank Traut]

....and troubleshooting guide if it exists. A Google Groups search
and internet search yielded nothing. I've got a 'silly scope here
with a missing fuse and ALL wires cut going from the line cord/fuse
holder<>circuit boards. The wires were cut 1/4" down, so I can still
make out the colouring on the insulators. Still, they do not match
up totally and there are more leads from the circuit boards than
there are on the fuse assembly. As she sits now, she's little more
than a semi-pretty decoration :-( This is the Bell+Howell Schools
version, made by Heathkit it 1984. That much I was able to ascertain.

Please e-mail if you have any info and/or schematics. Thanks!!

 

[Joerg]

Frank Traut wrote:

...and troubleshooting guide if it exists. A Google Groups search
and internet search yielded nothing. I've got a 'silly scope here
with a missing fuse and ALL wires cut going from the line cord/fuse
holder<>circuit boards. The wires were cut 1/4" down, so I can still
make out the colouring on the insulators. Still, they do not match
up totally and there are more leads from the circuit boards than
there are on the fuse assembly. As she sits now, she's little more
than a semi-pretty decoration :-( This is the Bell+Howell Schools
version, made by Heathkit it 1984. That much I was able to ascertain.

Please e-mail if you have any info and/or schematics. Thanks!!

Check this out, maybe the 10-10 is similar enough but I don't know that
scope:

http://www.vintage-radio.info/heathkit/

--
Regards, Joerg

http://www.analogconsultants.com/

"gmail" domain blocked because of excessive spam.
Use another domain or send PM.

 

[Frank Traut]

Joerg wrote:

Check this out, maybe the 10-10 is similar enough but I don't know that
scope:

http://www.vintage-radio.info/heathkit/

Thank you. In my search, I saw that site. Not sure if 10-10 *is* similar
enough either. Upon further inspection, I noticed 2 wires cut from the
yoke of tube also.

 

[Frank Traut]

Joerg wrote:

Check this out, maybe the 10-10 is similar enough but I don't know that
scope:

http://www.vintage-radio.info/heathkit/

Thank you. In my search, I saw that site. The 10-10 is definitely
not similar enough as the 10D-203 as I saw symbols for tubes. Mine
is a solid state unit. And upon further inspection, I noticed 2 wires
cut from the yoke of tube also :-( So, 4 snipped by the AC input
line, 8 snipped from a PCB and 2 (or one cut in half) on the tube.
There may be a capacitor missing as well (not sure if one is supposed
to be there or not).

I'm sure there is a short or bad component somewhere, so even after
wiring this thing properly, will still have to troubleshoot it. All
components look good cosmetically though. No obvious fried signs.
Can test for bad diodes easily enough though, once I have a better
idea of how to get power to this thing.