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Old 30th January 2011, 03:43 AM   #1
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Default Alpine MRP-M1000

I got this amp in for repair and it had 32 defective outs and a D600K .

I then noticed that ZD4901 is defective also. Its a HZK12A2L diode.

Wondering if anyone know if theres a diode i can put in that location for right now to troubleshoot the amp somemore before i order parts.

So wondering if theres a good diode i can sub for right now to troubleshoot somemore.
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Old 30th January 2011, 04:28 AM   #2
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It's a 12v. 1/2w Zener. A standard 1/2w (or greater) Zener could be used for testing.
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Old 30th January 2011, 04:58 AM   #3
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Would a 1n4148 or 1n4150 work?
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Old 30th January 2011, 05:12 AM   #4
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Those are switching diodes, not Zener diodes. A 1N5242 or a 1N4742 would work.
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Old 30th January 2011, 05:23 AM   #5
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Ok put a 1n4742a in the amp and it draws excessive current then it goes dead then draws excessive current.

When the amp does this all outputs heat up and D9902 gets hot .

Any ideas?
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Old 30th January 2011, 05:54 AM   #6
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The driver ICs may have failed also.
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Old 30th January 2011, 10:51 PM   #7
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Does anyone know where i can get the driver ic's for this amp?

Allied electronics show 2 different 1's a 15 lead and a 16 lead .

I have the 16 lead 1 but they show no stock on that 1.

The parts number is IR2010S
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Old 30th January 2011, 10:57 PM   #8
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INTERNATIONAL RECTIFIER|IR2010SPBF|IC, MOSFET DRIVER, HIGH/LOW SIDE | Newark.com

The 15 pin description is likely a typo. Call or email them to confirm if you want to buy from allied.
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