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Does it have an NTSC equivalent? Line TBC? |
The good news is that I've no longer issues of any kind at machine start, also after the unit was left unplugged for few hours. I don't know if the previous behavior is normal when a unit is not used for long time.
Today I've removed the bottom panel of the VCR to inspect the toothed belts that are actually in very good conditions (very elastic). I also inspect the boards as much as possible without disassembling all the VCR and I cannot see any visible damage or problem. I've also notice that all the moving parts (both plastic and metal) have good grease applied so I guess some maintenance was done not too far ago. The thrift shop dealer said that the guy who brought him the AG-4700 was a (former?) employee of the Italian national broadcasting company (RAI) that was dismissing old equipment. I don't know if the story is true and of course I don't know if the VCR was a business or private unit. It's true that Turin (where I live, in north-west of Italy) was the first RAI headquarter when it was just a radio broadcaster and today there are still: a production center, a research center (CRIT) and a research and restoration center for the audio/video archive (TECHE RAI) that uses hundred of machines to digitalize the analogic material. |
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Maybe I haven't find the right words and there is some missunderstood of what i have written. In passive mode the output from the Panasonic AG is the raw picture as the Panasonic can give it out. Without any improvments. The blur/sharpness slider has no function. If AI (Analysis Intelligenz) is on the recorder tries to find the best compromise between sharpness and grain for the tape. This works during playback and recording. The sharpnes/blur slider has no function too if it is on. If you caompare the output from player/recorder mode and the blur/Sharpness slider is in center position you will not see a big difference. But only in passive mode with Ai off it's the true output without any improvments from the panasonic AG4700/HS1000. But remember every recorder have there own properties, that's why true/good professionals have a few different recorders (I'm not a professional but have 10 SVHS/VHS recorders). For example the output from the Panasonic FS200 in edit mode is diffferent and it will be diffferent with a JVC or any other too. Some increase chroma, luma, colour shift 1 or 2 lines or other things. Quote:
In most cases I use the canopus nx to capture. If the jitter correction isn't good enough from the canopus I use a dvd recorder in passthrough mode with the canopus or an dvd recorder with HDMI Output in passthrough mode to the HDMI Input of the Blackmagic Intensity Shuttle. Before someone say that's not recommended hardware. I live in PAL country and what I have read here and on other forums some hardware works better with NTSC and some with PAL. (For example I have an external TBC and 2 ATI cards a 7200 and a 9000,too). I have found a video on youtube and the Hitachi VT-S772A looks quite similar with the pal version. He has the "magic" door opener too. One thing I have forgotten to say. The player is only the first device in the capture chain. If the capture card produce errors (for example clipping, audio out of sync, moire or any other things....) the best recorder in the world couldn't help. |
Do you know what A/D converter chip the canopus nx card uses? From what I've seen the older canopus DV boxes used a Philips/NXP SAA7114H chip, though it seems that chip would be a bit outdated when the nx cards were released.
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You might know that 2 version of the card exist. For the PCI-X bus and PCI Express. I have both cards but the PCI Express card is in use so have I disassembled the PCI-X card but I think both have the same chips.
I couldn't find any Philips chip on the board. It looks like that it use a NEC chip. But have yourself a closer look at the pictures. |
Ah, looks like there's an Analog Devices chip, can't spot which model though, that would explain it's ability to correct some jitter. Blackmagic intensity and Aja Kona also use ADV chips.
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Yesterday I inspected the AG-4700 better, looking for issues or bad electrolytic SMD capacitors.
I have to admit that it has been a quite scary experience, because the mainboard is heavy, full of small boards welded and "thousands" of wires (some very short) pulling in each direction. Attachment 9061 I had to take out the TBC, the front panel, the display board and the VITC board before I was able to remove the mainboard (it has been a pain). Starting from the TBC everything seems fine and there are no SMD capacitors. Attachment 9060 Regarding the mainboard I also could not spot any electrolytic SMD capacitors on the other boards (the Y/C board was hard to inspect) and I think this is the reason why the deck is still working. Unfortunately I could not take any photo of the other boards because my hands were busy at holding the mainboard and I didn't want to unplug all the wires and cables and put all together back again. Surprisingly this morning the AIW 9600 arrived. I have not installed the board yet but I can confirm it's brand new. |
AG-4700 is HS-1000 with different color and higher price tag. Same video head, same mech. From my memory, all the PCBs look the same.
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I know that AG-4700 and HS-1000 are the same machine. I was just saying that maybe these boards are a bit more reliable compared to other panasonic VCRs such as the AG-1980 (full of SMD caps)
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This is not statistically significant, but.. I had maybe 3-4 FS200(AG-1980) and half a dozen HS1000 or clones. A couple of FS200 had the cap/psu problems atleast, no problems with HS1000 in that area. HS1000 is also more recent so it has that advantage.
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On a spare parts list the Panasonic HS-1000 head drum has number E-378 and the the head drum for the AG4700 number E-347. |
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The blue capstans are hardened but not chromed, which resists erosion, polishing and slip after 1000's of hours use. |
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The NV-HS1000 we got here has the same VEH0651 upper drum.
Maybe there is some variation between different versions of the same model, in this thread there is a picture of one that looks markedly different. There does seem to be a few sub-versions of both the NV-HS1000 and the AG-4700. The differences are probably mostly related to tuners and with/without NICAM but I guess there could be more. There's also a similar NV-HS800 that seems to lack some features like the TBC. |
I've changed the drum versions between HS1000's and they work fine without any adjustments. IIRC HS-950 has same upper drum also and you could get them for 50€ in good condition, when new drum as spare part cost like 300€. :)
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http://www.gummimeyer.de/Audio%20Vid...rsatzteile.pdf Maybe it's only the order number because my HS1000 has the number VEH0651,too. |
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