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#1
12-17-2025, 01:49 PM
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RCA VPT695HF troubles
The head was stuck when I got this, but I freed it just rotating it by hand. I replaced the one belt this uses, and then it played tapes. But the picture was 'smeared' out and with dark and light vertical bars -- but I then tried it with the composite output and it looked fine --
Figuring the trouble was in the modulator - I removed the modulator from the main board it was soldered to-- took it apart and saw 3 electrolytic capacitors, one of which was visibly bulged out and thought just to replace the 3 capacitors and put it back together and see what happens -- but I broke some surface mount component on the modulator board trying to solder on one of the new capacitors Now does anyone know where I can get a schematic of the modulator to see what it is I broke, or what other VCRs I could interchange the whole modulator unit from? Thanks. (I just fixed and sold an RCA VPT630HF - now I wish I had kept it - I bet I could have just swapped the whole modulator into this one) 
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#3
12-17-2025, 07:39 PM
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I worked on a couple of those between 1989 and 1996. Nice Hitachi built RCA branded 'Dimensia' HI-FI VHS Digital VCR with picture-in-picture, likely the top of the "P" line (1987) with the 640 and your 630 immediately under it.
I wish I could help with the problem. But, if the RF modulator is a complete replaceable assembly there may have never been a schematic available for it. I just looked through my old notes but I never had an RF modulator problem in either of the two units I had on the bench back then. I also looked to see if its FCC ID # (ABL9670052) was shared with any other models, but according to my cross-reference research it is not, it's a lone wolf. The VPT640HF and VPT630HF's FCC ID # was AHA9670051. It is possible that the 630 (and 640) shared the same RF modulator. I'm sorry that I don't still have service data available to confirm. Good luck with it! Brian Last edited by Blast; 12-17-2025 at 07:43 PM.
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#4
12-22-2025, 07:41 PM
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Thanks for looking this up. I was hoping I could just swap a modulator out of a any RCA VPT model VCR... Anyway, here's pictures of the modulator. I put an arrow to the surface mount component I broke.
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#5
12-22-2025, 10:02 PM
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| Audiokarma |
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#6
12-23-2025, 05:06 AM
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Is there a part number on it?
https://www.ebay.com/itm/282765327965 https://www.ebay.com/itm/282765280036 https://www.ebay.com/itm/282765344247
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#8
12-23-2025, 06:22 PM
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If I were really hellbent on fixing the RF output, I might be inclined to figure out what model VCRs those I linked are used in and compare the schematics. Heck, maybe they are really all the same. In other words, if it fits and the connections are the same, just use it. Or you could try to figure out what part is broken by comparing other parts on the PCB and take a stab at surface mount soldering.
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#9
12-24-2025, 11:57 PM
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According to
https://partstore.encompass.com/item...tachi/5589001/ Models Hitachi Compatible Models VT2500AU VT2600A VT2605A VT2700 VT3605A
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#10
12-25-2025, 07:13 AM
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Quote:
I have not seen any of the other Hitachi models listed.
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| Audiokarma |
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#12
12-25-2025, 07:52 AM
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Quote:
In the 80's and 90's our shop repaired LOTS of RCA VCR's (we were warranty authorized) but very little Hitachi, by comparison. And of all those, very few RF modulator replacements. I did make repairs involving resoldering abused in/out jacks back on the convertors. But modulator failure due to electronic failure was rare in RCA.
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