HP 32SII success and woes

[Sanjeev Visvanatha]

(02-16-2015 09:36 AM)jebem Wrote:  Now, the real challenge here is to find out the correct value of it.
Can you identity the printed numbers on it?
Also, if you have access to a multimeter, please try to measure it in circuit; take two readings, first using positive probe on the left side of the resistor, second reading using the positive probe on the right side.
(of course all this must be done after removing the batteries and short-circuiting the 10uF capacitor for at lest 1 minute).

There are no markings on the SMD resistor. It is a jumper as we have concluded before.

The capacitor is marked 106 16k, the same as the HP 10B I have and the link quoted above.

I only have access to an analog multimeter. With it set at 10x, the resistance of the jumper reads ~0.0 Ohms.

The resistance across the capacitor reads about 16 Ohms.

The resistance across the same spec capacitor on the HP 10B PCB I have is 17.5 Ohms.

(02-16-2015 09:36 AM)jebem Wrote:  Now, that is interesting information!
If the problem lies inside the SoC, for instance with a few bad logic gates, then it is probable that varying the power supply up or down can allow these gates to start switching in sync with the rest of the circuitry.
If you have access to a laboratory adjustable regulated power supply, it was interesting to find out at what voltage level does it start misbehaving

I do not have access to a power supply.

Can I test the capacitor further with a basic analog multimeter?