MV-1FZ - sound audio issues

Update:
Speaking with Xi Xian, the chips from my Mv-1F will work on my MV-1FZ.

I have uploaded my progress. I now just need to solder in the new chips and then fix the traces identified.


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The SM1 is socketed and the component is missing and the 6116 looked like someone removed it and ripped up traces/pins and burned solder points where the chip goes in. I got this board a long time ago with a copy of Sengoku, the seller said the audio wasn't working, blah blah. So, for $70 shipped, I thought it was a good deal. My mistake...

The solder for the SM1 was so messy, removing it was a chore. I checked all the traces on the solder side to verify I didn't ruin any traces when I was desoldering it.

One last thing, the LSPC2-A2 between 133-176, looks brown at one point, approximately 4-5 pins, I can't tell if it's dirt or corrosion. I checked these traces and they are still actively sending a signal.



Wynd

update

This is the pinout for the 6116 SRAM on the MV1F mobo. If you are experiencing a Z80 error and have corrosion from a leaking battery check for continuity with these.

1 - SM1(5), Z80(37)
2 - SM1(6), Z80(36)
3 - SM1(7), Z80(35)
4 - SM1(8), NEO-D0(32), Z80(34)
5 - SM1(9), NEO-D0(31), Z80(33)
6 - SM1(10), NEO-D0(30), Z80(32)
7 - SM1(11), Z80(31)
8 - SM1(12), Z80(30)
9 - SM1(13), NEO-C1(74), Z80(14)
10 - SM1(14), NEO-C1(75), Z80(15)
11 - SM1(15), NEO-C1(76), Z80(12)
12 - GND
13 - SM1(17), NEO-C1(77), Z80(8)
14 - SM1(18), NEO-C1(80), Z80(7)
15 - SM1(19), NEO-C1(81), Z80(9)
16 - SM1(20), NEO-C1(82), Z80(10)
17 - SM1(21), NEO-C1(83), Z80(13)
18 - NEO-D0(12)
19 - SM1(23), Z80(40)
20 - NEO-D0(39)
21 - NEO-D0(40)
22 - SM1(26), Z80(39)
23 - SM1(27), Z80(38)
24 - VCC

I'm assuming the 6115 and SM1 from a MV-1f can be used on a MV-1fz.

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Speaking with Xi Xian, the chips from my Mv-1F will work on my MV-1FZ.

The issue now, is that the pin holes for the 6116 are literally gone, I don't know what they were thinking, so I'm going to have to identify the 5-8 that are bad and see where they go and solder lines directly to them from the parts and solder side of the board.. Wish me luck

For the LSPC2, use a fiberglass pen/nylon pen to get rid of the corrosion/color. Brush softly.

I assume this is what you're talking about

http://www.radioshack.com/product/index.jsp?productId=3998315

That's it.