Help with Chip ID

[polishedball]

AB is Allen Bradly for sure.

If, if, it is a resistor network,

104 should be 10K


Steve

10K or 100K

Some probing indicates it might be 100K but have not removed it from circuit yet and if that is the case I most likely won't as it measures the same as the others when measuring across the chip, IE pin 1 to pin 16, 2 to 15 etc

[mixedgas]

Depends on the convention they are using, but should be a power of 10.

104 should be 100K, your right.



Steve

[Laserman532]

Thanks steve, i would bet a dinner at taco bell you are right, i remember Pat Dugan my electronics guru really liked using those things (to make ckts smaller)...so with that being said...I would assume that is NOT the problem with the ckt. PB, do you have a scope that you could probe around with? Not that I would be much help with...i mean...i know what a scope is..

[polishedball]

Thanks steve, i would bet a dinner at taco bell you are right, i remember Pat Dugan my electronics guru really liked using those things (to make ckts smaller)...so with that being said...I would assume that is NOT the problem with the ckt. PB, do you have a scope that you could probe around with? Not that I would be much help with...i mean...i know what a scope is..

I do, I know I have the input at the card edge, but need to figure out the path it takes from there.

Downstream from the opamp I assume to be good, since with it in the circuit it pulls the actuator open and with it out it closes the actuator.

Next I may snip an replace the zener's perhaps one had a voltage shift. All passive components seem to test the same as there counterparts from the other drives while in circuit.

The LED indications follow correct as well, green open and red closed, but it will never trip it red unless I pull the opamp.

[polishedball]

Repaired! I kept going back to the opamp as it was all that made sense, I must have had a bad part in the bin when i replaced it first. I didn't have another but had a couple duals that I wired (not pretty) in place of the quad temporarily and it is now working again!

Thanks guys.

[Laserman532]

i found that the pots are labled

Attenuation - offset - dampening

when going from left to right...when viewing card so that pots are "up"

Top of card - channel 1-4
next layer - channel 5-8

glad you got it going again!

[mixedgas]

Pat,

Send Taco Bell gift card or round trip ticket to/from Oregon to....

Just kiddin...

Steve