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Old 9th January 2014, 07:57 AM   #1
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Join Date: Jun 2011
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Default Pls identify these ICs

Hello Again!

Could somebody tell me the part number of these encircled ICs, pls see attached file. Thank you very much!


I start learning how to fix driver board, previously I just replaced it.Click the image to open in full size.
Attached Images
File Type: jpg magus.jpg (217.8 KB, 124 views)
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Old 9th January 2014, 12:38 PM   #2
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Does either of the 8-pin ICs have a resistor connected directly between pin 8 and either pin 1 or 7?

Can you read the numbers on the 14 pin IC?
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Old 10th January 2014, 12:47 AM   #3
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Quote:
Originally Posted by Perry Babin View Post
Does either of the 8-pin ICs have a resistor connected directly between pin 8 and either pin 1 or 7?

Can you read the numbers on the 14 pin IC?
ohh Im sorry Perry. They have part numbers, I thought it was tampered. It is LM6172 and LM292, 14pins is 74HC02.

Thanks again!
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Old 10th January 2014, 03:54 AM   #4
timwebb is offline timwebb  United States
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massvie amp?
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Old 10th January 2014, 04:44 AM   #5
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Quote:
Originally Posted by timwebb View Post
massvie amp?
Locally, they called it as Magus amp:-) I dont know what's in the US version. Yeah it's look like a massive amp for its PCB color and SMT layout.
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Old 30th January 2014, 12:25 AM   #6
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Hello!

Please help it takes a long time to repair this driver board. Somebody tell me what is the part number of big IC 14pins? I know it is 74HC02 NOR gate but when I replaced it, my amp keeps burning.

I also confused to the orientation of this IC in the driver board, If I connect the pin 14 to VCc, 7 is GND which is normal, the output of the NOR gates connects to other NOR gate and input itself. If I reversed the orientation they are feasible but pin 14 is now GND and 7 is VCC.

I really confused...is there logic IC that has different Gate orientation?

Thanks! If somebody will share their schematic...kindly do it as badly needed.

Kindly check the first post for the picture of the amp.
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Old 30th January 2014, 05:27 AM   #7
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ohhh..I think this is 74HC00 NAND GATE. pinout is exactly to my PCB and the power supply, application will be similar seems they are universal gates. Thanks!
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Old 30th January 2014, 05:28 PM   #8
timwebb is offline timwebb  United States
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I think we need to make a sticky of parts conversations and driver board pictures.
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Old 3rd February 2014, 01:38 AM   #9
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The driver picture is in the first post attachment. By the way it works now...I used NAND gates since IC pinout had match the PCB layout.
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