#31
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Anyway, glad mine already got the orange one. Found this thread about the matching numbers for my tripler : http://www.videokarma.org/showthread.php?t=248180 So any of those replacement tripler would do? Thanks! |
#32
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History ( IIRC ) C line flat chassis 2 safety caps 22-5001 D & E line flat chassis 5 caps 22-5001 E line upright runs under 401 5 caps E- line upright runs 401 & higher one big 4 lead cap from E line on they all use one cap. Any white safety caps in any of these chassii should be changed to the newer orange drop style. Be sure to use the right one as there are several different ones. 73 Zeno |
#33
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Morning everyone,
In my search for a replacement sound module for the 9-103-04 in the CCII, I have come across a 9-103-04A. Could anyone tell me if this board is a known replacement for the 9-103-04? Findm? Thanks! |
#34
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if different. The A may be a minor revision. 73 Zeno |
#35
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Alright, I pluged the module exactly like the the 9-103-04, it worked , but it did not solved the problem.
I found this thread by DHR4683 : http://videokarma.org/showthread.php?t=265234 That last gasp CCII has the 9-103-04A board (the A is listed has a replacement part for the 9-103-04 in the schematics glued on in inside of the cabinet!), but what I find strange is that the board in this one is not wired the same as mine...shouldn't those board be wired exacly the same in order to work? Maybe mine was tempered with? Edit : I really have the impression that the volume slider is the problem...could those wear so bad that cleaning could not work? Thanks! Last edited by Dreamsbeard; 08-06-2016 at 10:42 AM. |
Audiokarma |
#36
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Sometimes wiring changes were made...It it takes the same power and signals in and spits the correct signals out, that is all the TV cares about.
Slider pots tend to be MUCH less reliable than rotational ones IMO. If you know the pot's resistance try subbing a rotating type and see if that helps.
__________________
Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 |
#37
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Thinking back over CC2's there were several plug ins. They
are marked by white paper or plastic tabs on the chassis contacts. Speakers ( 2 brown) A cap that just killed the bass on small speaker models. ( 17 & 19" & maybe low end 23 & 25" ) Volume control (not all). The VC changed a DC level to the IC NOT the usual coupling cap-VC-coupling cap. Mute between channels. (? blue-white ?) also raster mute went to the 9-88-# on these IIRC. Sliders can get very bad. Try cleaning with WD40. Unhook everything but SPKR & VC to narrow down. GL 73 Zeno |
#38
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I tried with another speaker...bad sound still there. I will get some wd40, but I juiced that sliding pot pretty good with my go to cleaner and it didn't do a thing. Will try the WD40 anyway, That cap that killed low frequency sure does sound good because its how I would describe the sound : high frequency are there but anything that is in the low spectrum is kind of garbles and muted... I imagine that cap is on the sound module? And if it is, could it be a high enough failure part that both my sound module could be bad? |
#39
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Thanks! |
#40
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Just looked at the photo. Looks like this has wires for
the VC & probably audio mute between channels or tone. Does it have a tone control ? Anyhows on the IF strip it shows where some of the wires go, check the layout chart also & be sure every things where it belongs. Looks like it has an oval SPKR so no bass cut cap. I will see if I got the manual but my squaw is on vacation & I just bought her a new car so she wants to go places, not fix TV's !!! I will get to it though........ BTW Analog meters are best for some tests & alignments. If you got one unhook the VC & see if it gives smooth ops across its range. The value should be printed on it. Zenith used heavy US made sliders but they still sucked like all others compaired to regular pots. 73 Zeno |
Audiokarma |
#41
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Both came from that bargain basement stash you pointed out a while back. |
#42
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Rather than replace the module, do you have a Sam's for the set that might give you DC voltages around the audio IC in your pic?
Are there separate discrete transistors for audio IF, or are all functions built into that IC? Another thought is look up that IC by number online, which should give clues as to the expected voltages and waveforms around that IC. If a DC voltage is off, either a resistor drifting high, or a leaking /shorted cap might be the culprit. Is the IC getting hot? Also, check the inputs to the module. The problem may not be the sound module at all. I'm thinking there will be sound "takeoff" point coming from the video IF, but I am generalizing and not as familiar as others with 70s SS sets. There are not that many parts on the audio module. Can you check for ESR on the electros, as well as resistor values? Your cleaner spraying of the volume pot should have changed the sound (even if only slightly) if it were the problem. Still, they are very problematic... Good luck! 😀 |
#43
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#44
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I read 0 - 75k ohms on that pot, Zeno does that sound about right to you? If so, will try to substitute with a rotary one just to see. Thanks! |
#45
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75K probably OK but seems like a high value 2 me.
Try hanging a different speaker on it also, could be the voice coil is stuck. Unplug the in set SPKR for test, use almost any SPKR for the test......... 73 Zeno LFOD ! |
Audiokarma |
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