Can a Zenith 9-160-030 sub for a 9-160-05?

[Electronic M]

Like the title says, I want to know if they can safely interchange.

I have a NICELY working 13" that uses the 030 and a nonworking 19" space phone set that uses the 05. The 05 looks like it has had a hard life....many burned and bridged traces lots of wear, evidence of servicing, etc, and I'd like to confirm it is the problem by substitution with a known good module before I jump in and try to fix it at the component level (assuming there is enough left of the 05 to fix).

[Gunslinger]

I think the 03 was subbed to an 05. you're going backwards.

[Findm-Keepm]

Originally Posted by Electronic M

Like the title says, I want to know if they can safely interchange.

I have a NICELY working 13" that uses the 030 and a nonworking 19" space phone set that uses the 05. The 05 looks like it has had a hard life....many burned and bridged traces lots of wear, evidence of servicing, etc, and I'd like to confirm it is the problem by substitution with a known good module before I jump in and try to fix it at the component level (assuming there is enough left of the 05 to fix).

Edit - Not according to Zenith. The -04 is the only sub for the -05



CRSP CRSP CRSP - that is the Zenith compatibility manual - remember the title, and the search is easier:

http://videokarma.org/showpost.php?p...89&postcount=7

Cheers!

[Electronic M]

Originally Posted by Findm-Keepm

CRSP CRSP CRSP - that is the Zenith compatibility manual - remember the title, and the search is easier:

http://videokarma.org/showpost.php?p...89&postcount=7

Cheers!

It's the first time I've worked on a SS Zenith.

Thanks, but that manual lists no subs for 9-160-03 (but it does not say to NOT use any specific variant), and 05 crosses to 04.....It is inconclusive. Perhaps I should just hook it in, start my variac at 70V, and hope I get picture and not smoke.

[andy]

...

[Findm-Keepm]

Originally Posted by andy

It will probably work, but I would imagine the HV for a 13" is lower than a 19". If you don't have HV, it's almost has to be the 9-160.

??? Not according to the CRSP - Zenith's definitive word on modules. In the beginning of the System 3 series, Zenith had a high rate of return on modules, and determined that techs weren't following the manual - weren't checking for proper Horiz drive, B+ and so on when swapping modules. The CRSP wasn't in independent service techs hands, so they got a mailing list for shops and mailed each one a CRSP. The result was a drop in module returns (Surprise, that module is not for that set....!) and in a humorous note, some techs wrote Zenith and asked for a subscription to the CRSP. Zenith actually added those independents to a list, and when the CRSP got updated, they got new CRSP manuals.

At one Zenith Seminar in early 84 (I attended with my dad's former boss, A Zenith dealer), they showed a set that was serviced using the wrong module, not sure of the combo, but swapping the wrong module had damaged another module. They also showed off a mod to the ultrasonic remote tester that allowed a tech to check for horizontal drive, a test that allowed you to isolate the fault to the correct module. The ultrasonic remote tester we had already had the IR mod, but I brought back the mod sheet and modded ours - just a resistor and coupling cap - the whole tester was built around an op amp driving an LED to show the pulsing of the remote signal, or with the Horizontal drive mod, the pulsing of the drive signal.

Bottom line is, use the CRSP and avoid the problems. It also lists all the duramodules and some digital modules. I have scanned about 80% and posted in various threads - just search CRSP.

Cheers,

[zeno]

I swapped hundreds of 9-160's
IIRC -03 subs to -05
-04 subs to -06
there was also a -08 ( rare) that subbed back to one of them.
An 05 or an 06 will sub ANY 9-160 between them.

IIRC you can not put the wrong one in due to the
yoke plug without forcing it & busting the skt.

IIRC also the newer subs used a multivibrater to kick
start the set & the old ones a transformer etc.

On some, remotes IIRC there is also a cable that gets
left off on a sub. Plugged on top & had 2 wires. Just
tie it off out of the way.

73 Zeno

[walterbeers]

Seems to me when I was working on those Zeniths back in the days, I used to sub those. However I would look at both of those boards and see what differences and changes were made between them. I don't believe you will smoke anything out by subbing them. I'd go ahead a give it a try. Can't hurt. If it doesn't work, at least then you will know.

[radiotvnut]

I've repaired a lot of them and have even replaced arcing flyback transformers on them; but, I always installed a used flyback (usually, in something I was fixing for resell) because the local parts house didn't have them. I was told that Zenith didn't offer the flyback by itself and when it failed, they wanted you to replace the whole board.

[zeno]

Never put an FBT in one. The FBT probably was a $30+ part & the whole board a little over $50 Xchange. Swapping the board takes 5 mn,
changing the FBT adds time & wait for part. In the house only
changed board or resoldered. If it had a shorted HOT we changed the board. Other things like PC cons, filter cans, the 32 V regulator
we would fix only on carry ins.
We tried a few HOT's but like a Sony they often ran perfect for weeks
then on a turn on BANG. If you gotta make a living you dont
want that over your head. Fix it fast & keep the customer happy.
Gotta remember this is one of the 3 most complex sets built as
far as PS/Hoz sweep goes. RCA SCR & ITR sets ( and clones) & Sonys with 2 SG613's were the others.

73 Zeno

Originally Posted by radiotvnut

I've repaired a lot of them and have even replaced arcing flyback transformers on them; but, I always installed a used flyback (usually, in something I was fixing for resell) because the local parts house didn't have them. I was told that Zenith didn't offer the flyback by itself and when it failed, they wanted you to replace the whole board.

[Electronic M]

Okay, I'm going to at next opportunity try to swap the boards. If it works with the 160 from my good set, then I'll try to fix the bad board, and if that fails buy another.

[rrrhre2s]

and if that fails buy another

I thought the stream of 9-160 modules dried up 15 years ago ?

Or do you mean another set ?

Beware I have had the 9-152 to damage the 9-160 rare but possible.

Found the training manual for the 9-160 service seminar, quaint reading today.

I had forgotten just how complicated that board was in it's day.

Anybody forgotten the Motorola (Quasar) JA panel ? (was too far ahead of the technology at the time)

rrrhre2s

[jbattles]

They never seemed complicated to me. Very easy to figure out. I never bought a rebuilt board. I always fixed them myself those sets paid the bills.

[jstout66]

The filter cap went south on my Zenith System 3.
It uses the 9-160-05 board
Was wondering on the big 2 section cap, if that is what one tries to get when replacing caps on the board (if even still available) or if you just replace it with 2 caps?
Also.. for those who have rebuilt this board, anything else to watch out for, or re-do?

[zeno]

Use 2 caps & be sure any grounds tied by the old can are retied.
Go over the PCB real good for cold joints, there ARE some.
Check the 200 V supply filter cap. Right rear near FBT.
IIRC 10 mfd 415V. There was also a lytic in the H drive that
could int kill the HOT but I dont remember the details.

73 Zeno