Andreas,

I'm kind of new to the 16500/16700 family.  What I understand is that HP used a glue to attach the board spacers that become corrosive over time and could eat through traces and pc boards.

Other than that It is a good instrument.

             Mike

On 9/27/2026 2:53 AM, hupfadekroua via cctalk wrote:
Hi all,

I‘m quite interested in your experience with 16500 Maimframes.

Mine is not very good, since I tried some of them.

Each one died with a defective PSU Board, some died very spectacular.

Since the psu board is very complex as well as there seems to be no schematics 
available I gave up on these systems.

I‘d like to give them another try.

Best

Andreas

Am 26.09.2026 um 21:37 schrieb Adrian Godwin via cctalk <[email protected]>:

I have some 16500A frames which uses a similar panel. The rotary encoder
and contrast/brightness controls are a little different but the IR section
may be the same.

On Sat, Sep 26, 2026 at 6:06 PM Mike Katz via cctalk <[email protected]>
wrote:

Glen,

I bought a 16500C on ebay but it was not packed well and the front panel
metal frame was broken as well as one of the tabs that holds the pems
nuts on the front panel.  It is also missing, i think, one of the 4
position black IR "directors" that mount on top of the photo transistors
on the curved circuit boards at the bottom of the display.

If I have to I can harvest them from my 16500b but I prefer not to ruin
a perfectly good unit to repair another.

The part numbers that I can find are:

MP1    16500-40201  Front Panel
MP22  5021-5807      Frame Front

I cannot find a parts list for the IR Detector circuit board.

I am also still looking for the 80 pin high density cable to connect the
16500B main circuit board to the lan interface board. The part # for the
additional cable that I am looking for is 16500-61614.

Do you know where I can find either a dead 16500C I can harvest the
parts from or know where I can get the parts?

Thank you,

                Mike
[email protected]



On 9/20/2026 12:44 AM, Glen Slick via cctalk wrote:
On Sat, Sep 19, 2026, 9:33 PM Mike Katz via cctalk<[email protected]

wrote:

The distance is about 4 inches or less I believe.  I can measure it.

The 80 conductor 16550A cable might be too short. Also, it might be keyed
the wrong way even if it was long enough. The 16550A cable polarization
tab
is keyed pin 1 to pin 1, while the 16500B / 16500L/H cable might be
reverse
keyed between the two ends. I'd have to pull the lid off of a 16500B to
check.


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