PCB Repair Logs Led Storm - Revision history

Brad at 03:52, 6 February 2013

2013-02-06T03:52:50Z

← Older revision		Revision as of 11:52, 6 February 2013
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	<tr class=">		<tr class=">
	<td colspan="2" class="" style="text-align:center;">[[Image:marquee_led_storm.jpg\|200px]]</td>		<td colspan="2" class="" style="text-align:center;">[[Image:marquee_led_storm.jpg\|200px]]</td>
			</tr>
			<tr class="">
			<th scope="row" style="text-align:left; white-space: nowrap;">Manufacturer</th>
			<td class="" style="">[[PCB_Manufacturers_Capcom\|Capcom]]</td>
			</tr>
			<tr class="">
			<th scope="row" style="text-align:left; white-space: nowrap;">Year</th>
			<td class="" style="">1988</td>
	</tr>		</tr>
	<tr class="">		<tr class="">
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	<tr class="">		<tr class="">
	<th scope="row" style="text-align:left; white-space: nowrap;">Pin Out</th>		<th scope="row" style="text-align:left; white-space: nowrap;">Pin Out</th>
	<td class="" style="">~~Reserved~~</td>		<td class="" style="">[[PCB_Pinouts_Jamma\|Jamma]]</td>
	</tr>		</tr>
	</table></p>		</table></p>

2012-08-20T04:19:26Z

← Older revision		Revision as of 12:19, 20 August 2012
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	<br>		<br>
	'''Symptom:''' One layer of background graphics corrupted/repeated vertically and some bit shimmering<br>		'''Symptom:''' One layer of background graphics corrupted/repeated vertically and some bit shimmering<br>
	'''Cure:''' Did a bit of prodding around on the lower board and found that touching a group of pins on the surface mounted (64 pin 1mm flat pack) 23C4000 caused the shimmering problem to change a bit. Isolated the fault to pin 31 on that chip which is A5 (an input with no signal) and checked where it should be coming from (pin 13 of the PAL at location 1K). The trace between these two points had been severed by an extremely tiny bit of corrosion where the track met a plated through hole. Fixed this and all was well.<br>		'''Cure:''' Did a bit of prodding around on the lower board and found that touching a group of pins on the surface mounted (64 pin 1mm flat pack) 23C4000 caused the shimmering problem to change a bit.

			Isolated the fault to pin 31 on that chip which is A5 (an input with no signal) and checked where it should be coming from (pin 13 of the PAL at location 1K). The trace between these two points had been severed by an extremely tiny bit of corrosion where the track met a plated through hole.

			Fixed this and all was well.<br>



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2012-08-20T04:18:56Z

← Older revision		Revision as of 12:18, 20 August 2012
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	'''Forum Thread:''' [http://www.aussiearcade.com.au/showthread.php/23431-LED-Storm-Repair-Log LED Storm PCB Repair]<br>		'''Forum Thread:''' [http://www.aussiearcade.com.au/showthread.php/23431-LED-Storm-Repair-Log LED Storm PCB Repair]<br>
	<br>		<br>
			'''Symptom:''' One layer of background graphics corrupted/repeated vertically and some bit shimmering<br>
			'''Cure:''' Did a bit of prodding around on the lower board and found that touching a group of pins on the surface mounted (64 pin 1mm flat pack) 23C4000 caused the shimmering problem to change a bit. Isolated the fault to pin 31 on that chip which is A5 (an input with no signal) and checked where it should be coming from (pin 13 of the PAL at location 1K). The trace between these two points had been severed by an extremely tiny bit of corrosion where the track met a plated through hole. Fixed this and all was well.<br>



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