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Was curious and started searching somewhat too. Found these other 4 pages of the same guide.

Without full schematic you might have to (partly) reverse engineer that DMM.

What is the main driver for the LCD? In that 90s a ICL7106 would have been very common, although that is only a 3,5 digit ADC.

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Hey, gang!

I bought a great little DMM bargain in the form of a thandar TM451 (4? digit) and the calibration is not far out, but it looks a little complicated to do.

Opening it up shows a few boards all marked DMM2650 - so a search found that it was probably made by Sansei - but there's also a SIXING branded one from China...

https://duckduckgo.com/?q=Sansei+DMM2650&atb=v273-1&ia=images

I also found 5 interesting pages of a Chinese guide?


I think I have some hints from the service manual for the thandar TM351 (3? digit) - it seems to have complications like frequency compensation in the AC ranges.

Thanks,

Q.

Hello,

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Might anyone have a clue to find out english manuals for a Panasonic VP-7637A Stereo Modulator ?

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I found a Japanese version of the manual, but the reading with the phone translator definitely need to be improved...

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Thanks for helping,

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Best Regards,

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Fran?ois / F4HTX

Hi, I have the Hioki 3166 with the floppy disk drive, but I don't have the windows software for viewing the logs and cannot find it on the Hioki website. I wonder if anyone here is able to help, perhaps someone has the software or knows of an alternative I could use? Thanks.

I'm looking for an Anritsu ML83a power meter. Please let me know if you have one to sell.

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James Morris

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I have uploaded a bunch of manuals here:

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Specifically these will be of interest:

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Regards,

Jared

Hi,

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Is anyone here who owns service manual for Advantest R3765CH network analyzer ??

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Thanks

Arek?

Hello everyone,

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Is there anybody interested in this Yokogawa WT3000 power analyzer with three 30A / 1000V measurement modules?
Its in excellent condition and working properly. It passes all self-tests.

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Payment can be done via IBAN or PayPal. Shipping occurs from Germany and can be worldwide.
Just get in touch to discuss details. It also possible for me to make more high resolution pictures or a video of the product.

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Asking price is €3300.

Hey,
Hope your all well,

I am looking for any information on the Iwatsu 8000 series mainframe scopes.?
I recently obtained a Iwatsu Mainframe and Spectrum Analyzer plug-in unit. While I was able to repair them to the point where they are seemingly functional, I have no information on them. Basically i'm trying to hunt down a manual and/or cal procedure specifically for the spectrum analyzer as it seems to have "quirks" which may be issues. These seem to be very rare in the UK and so id like to be able to maintain it forever hopefully.
The SS-8120 is a 100MHz 1980's era mainframe supporting 3 plug in units.I was able to find a hard-copy of a manual for this which i do intend to scan and archive somewhere online (any ideas where?).Iwatsu also made a storage scope version and several plugins all of which equally have little documentation. ?

The A-880 is a 20Hz-11MHz swept spectrum analyzer with built in RAM storage to work in non storage scopes. It it well built with no custom IC's and using all japanese parts.?
And thats about all i can find.
I can find zero manuals for the SA, at the same time i cant even find evidence if iwatsu ever selling it. I cant even find any spectrum analyzers sold my iwatsu.

If anyone has any information at all, on the mainframes, plugins, iwatsu in general id appreciate it as id hate these instruments to be lost to time.
Thank-You
Isaac Walsh

I haven't found anything on the MG3642, but I have uploaded all I could find on the MG3641A and MG3642A here:

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It may be of limited value though... I'll try an email soon to Anritsu to see what they have to say.

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Regards,

Jared

I found a Japanese manual for the MAK-6630 which I've uploaded here:

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With any luck, the two models should be similar enough to make this manual useful.

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Luckily it appears to be selectable text instead of scanned images, so it should be possible to cut and paste paragraphs into your translator of choice.

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Regards,

Jared

I bought this in a job lot for spares. Turns out that it works...

I opened it up and am lost for words.

Handsome is a word.