Tektronix 7603 100 MHz OSCILLOSCOPE MAINFRAME.

[BILL bs.xxxxxxxxxx.corn]

Need Scan of Service Manual, the EHT PSU for the Tube, this has been
given to me but in a Bag of bits..

So can and one Please scan the Circuit section and the parts layout..

Thanks.

As this might save me a lot of time..

 

[Andy Cuffe]

Need Scan of Service Manual, the EHT PSU for the Tube, this has been
given to me but in a Bag of bits..

So can and one Please scan the Circuit section and the parts layout..

Thanks.

As this might save me a lot of time..

Have you checked ebay? There are lots of people selling CD-roms of
Tektronix service manuals for under $10. I've bought a few and I've
been very happy with them.
Andy Cuffe

[email protected] <-- Use this address until 12/31/2005

[email protected] <-- Use this address after 12/31/2005

 

[John-Del]

You didn't mention your problems with it, but in 20 something years
using a 7603, the only problems I've had are the huge electrolytics
caps in the power supply can. They are typically Mallory's, and they
fail suddenly. If they are all original, you will likely find several
completely open, and the rest perfect. Change them all.

John

 

[BILL bs.xxxxxxxxxx.corn]

You didn't mention your problems with it, but in 20 something years
using a 7603, the only problems I've had are the huge electrolytics
caps in the power supply can. They are typically Mallory's, and they
fail suddenly. If they are all original, you will likely find several
completely open, and the rest perfect. Change them all.

John

The EHT 10KV or what ever has been had a go at, and I have a bag of bits from
it..

 

[tekman]

The EHT 10KV or what ever has been had a go at, and I have a bag of bits from
it..

18 kV EHT is delivered by the voltage multiplier. The wire from the
ferrite transformer to the multoplier can by easily located.

Unsolder this wire. Does the HV inverter circuit now start up?
If so, replace multiplier.

In the 7603 I had to repair, it was amin failutre the dried out
electrolytics in the LV supply and secound this multiplier.

So, your chances are high to find the solution to your "bag of bits"
;-)

hth,
Andreas

 

[BILL bs.xxxxxxxxxx.corn]

18 kV EHT is delivered by the voltage multiplier. The wire from the
ferrite transformer to the multoplier can by easily located.

Unsolder this wire. Does the HV inverter circuit now start up?
If so, replace multiplier.

In the 7603 I had to repair, it was amin failutre the dried out
electrolytics in the LV supply and secound this multiplier.

So, your chances are high to find the solution to your "bag of bits"
;-)

hth,
Andreas

This Scope was found at the local Tip with some work been done on the UHT
thing, another chap tried to get it working, but failed so I ended up with it,
with some parts removed, and in a bag, that is why I am after a scan of the
EHT section of the service manual, to see what is missing and to find out
were these parts go..