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Old 03-02-2012, 06:34 AM   #8
PlainBill
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Default Re: How do I test integrated circuits with a multimeter?

Quote:
Originally Posted by Koda View Post
I hoped to avoid removing dozens of smd capacitors and resistors from boards to test them.
It's possible to do this if you have a schematic. Even without a schematic it may be possible to spot a gross problem. Part of the challenge is knowing what the circuit does.

With a schematic you can check the value of the resistors and capacitors and use a 'not less / greater than' rule. A good resistor in circuit will never read greater than it's true value because parallel resistances will reduce the resistance. A good capacitor in circuit will never read less than it's rated capacitance because any parallel capacitances will increase the capacitance.

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