Electronics > Repair
Series defect on agilent 167xx boards?
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Hamster:
@markL Check for broken traces on your chipsel error, see my post above, i have had several cards give this erorr and it was a trace at the back side of the board ...

MarkL:

--- Quote from: Hamster on April 13, 2022, 07:47:00 pm ---@markL Check for broken traces on your chipsel error, see my post above, i have had several cards give this erorr and it was a trace at the back side of the board ...

--- End quote ---
Thanks, but it was actually DogP's card that had the ChipSel errors.  I was just playing along and posting probe results from a working card trying to help.

I agree that bad traces are the #1 problem on these cards.  But in this case DogP figured out it was a bad clock PLL chip.  Read back a few posts for the details on the symptoms and resolution.

Thanks for posting your symptoms and the areas you fixed.  Hopefully they'll be of help to others.  I'm not surprised on the "COMP_ZOOM_ERROR" fix.  The traces you fixed go to the voltage reference input on some of the comparators.
Hamster:
Ahh..

DogP did you ever source a SY89421V  ? I have a couple of 1675X boards that are "beyond" repair that can be scavenged off.
DogP:

--- Quote from: Hamster on April 13, 2022, 11:36:19 pm ---DogP did you ever source a SY89421V  ? I have a couple of 1675X boards that are "beyond" repair that can be scavenged off.

--- End quote ---
Yes I did... MarkL was kind enough to send one my way, which got it back up and running.

A couple side notes -
I was able to track down another set of cables, so now I've got a both 1675x cards running (master/slave) with a full set of cables.
I also upgraded the HDD to CF by modifying one of the cheap ACARD AEC-7722 SCSI to IDE adapters.  That brought the boot time down from 3:25 to 2:55, and got rid of the loud OEM HDD... enabling fast boot knocked another 12 seconds off that.  I still need to permanently mount the adapter inside the chassis though.

DogP
MateKrisz:
Hi all,

I need reopen this topic, because of I have same problem with the cards.
I have a HP 16702A, with the following cards:
2x 16534A - both working fine.
2x 16555D - primary is good, secondary is bad
1x 16720A - bad

The 16720A surface is looks good, no corrosion on the PCB.
When I run the pv utility, the following tests are failed:
loopback
clock_test
wait_test
instint_test

In case with 16555D I got the fail results when I ran the following tests:
pld_dpath_stest
vram_serial_stest
encoder_stest

Possible to find a schematic for these cards? I found a "service manual" but it is not highly detailed.

MateKrisz

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