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(Topic ID: 333036)

Firepower II solenoid and switches active after game over

By sparrowsinfrost

1 year ago


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#7 1 year ago
 
JWK

sparky672

Pinside member

US Manhattan, IL

11y 55,050 1,730 1

OP
Quoted from sparrowsinfrost:

... R24 was replaced at some point, it does seem to be the correct part it has a reading g of 1.68, the other similar resistors are reading 2.1 ish (2.7 ohm in manual) ... it is connected to R195 that is inline with the blanking. r195 reads 0.68, the other resistors of this type read 4.6 (4.8 in manual).

You absolutely cannot measure resistors while they are wired into a circuit. You are effectively reading the resistance of everything else that is electrically in parallel. The more things in parallel, the lower the reading.

If you seriously suspect a bad resistor, you would at least have to lift one of the legs out of the circuit before measuring it.

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#13 1 year ago
 
JWK

sparky672

Pinside member

US Manhattan, IL

11y 55,050 1,730 1

OP
Quoted from sparrowsinfrost:

so I have to desoder every resistor in order to test it?

Yes! Resistors cannot be measured when wired into a circuit.

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