PCB Repair Logs Aliens - Revision history

Brad at 22:52, 4 February 2013

2013-02-04T22:52:59Z

← Older revision		Revision as of 06:52, 5 February 2013
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	<th scope="row" style="text-align:left; white-space: nowrap;">Manufacturer</th>		<th scope="row" style="text-align:left; white-space: nowrap;">Manufacturer</th>
	<td class="" style="">Konami</td>		<td class="" style="">[[PCB_Manufacturers_Konami\|Konami]]</td>
	</tr>		</tr>
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Brad at 06:12, 4 February 2013

2013-02-04T06:12:57Z

← Older revision		Revision as of 14:12, 4 February 2013
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	<td colspan="2" class="" style="text-align:center;">[[Image:marquee_aliens.png\|200px]]</td>		<td colspan="2" class="" style="text-align:center;">[[Image:marquee_aliens.png\|200px]]</td>
			</tr>
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			<th scope="row" style="text-align:left; white-space: nowrap;">Manufacturer</th>
			<td class="" style="">Konami</td>
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			<th scope="row" style="text-align:left; white-space: nowrap;">Year</th>
			<td class="" style="">1990</td>
	</tr>		</tr>
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Brad at 05:32, 4 February 2013

2013-02-04T05:32:24Z

← Older revision		Revision as of 13:32, 4 February 2013
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	<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="">[http://wiki.aussiearcade.com.au/index.php/File:Jamma_pinout.png Jamma Pinout]</td>
	</tr>		</tr>
	</table></p>		</table></p>

Brad at 05:23, 4 February 2013

2013-02-04T05:23:50Z

← Older revision		Revision as of 13:23, 4 February 2013
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	The scrap Aliens board is still scrap, have found and bridged 5 open circuit tracks around the CPU and it is still firmly dead, I may get back to it one day but I may not.		The scrap Aliens board is still scrap, have found and bridged 5 open circuit tracks around the CPU and it is still firmly dead, I may get back to it one day but I may not.
			<br>
			<br>
			===Board 4===
			<br>
			'''Repairer:''' [http://www.aussiearcade.com.au/member.php/11905-retroyoda retroyoda]<br>
			'''Forum Thread:''' [http://www.aussiearcade.com.au/showthread.php/56573-Konami-Aliens-%281990%29-repair-log-no-blue-red-video-output-bad-audio Aliens PCB Repair]<br>
			<br>
			Hi chaps,
			I recently bought a set of 4 "untested" arcade boards which included a 1990 Konami Aliens board. This one looked to be in the best condition, so thought this would be ideal for my first attempt at an arcade board repair.

			I started by inspecting the board, and noted that there were some deep scratches on the underside of the board, and I noticed a bent pin on one of the custom Konami surface-mount ICs which was shorting out against the pin beside it, and a large capacitor in the corner of the board which was bulged and leaking.

			I used a needle to straighten the bent pin on the custom IC, and decided to ignore the capacitor for the time being since I figured it was probably just part of the audio circuitry. After testing the scratched traces on the underside of the board with a digital multimeter, I concluded that although the scratches looked nasty, they weren't affecting the continuity of the traces.

			After powering up the board, it proceeded to perform a quick self-test and then moved on to the title screen albeit only in green!
			I started a game and all sprites and backgrounds were fine, music and sound effects were ok but very crackly.

			I powered off again and started tracing my way back from the JAMMA connector to figure out why there were absolutely no red or blue video signals being displayed. The first components I came to were some flat component packs labelled Konami 052535 which had no visible damage. All solder connections and surrounding traces and components tested checked out ok so I had a look on the internet to see if I could find what the mysterious 052535 parts were.

			I found somewhere selling them for £7 each, also found a couple of repair logs noting that missing colour output problems had been resolved by replacing these parts, and after yet more searching finally found someone who had disassembled one of these components for analysis:

			http://mrsportysrb.blogspot.co.uk/20...52535-joy.html

			I went back to the board to take some readings off these components while it was running and noted that all three parts appeared to be receiving similar input signals, yet there were no output signals on two of the three parts. This pretty much assured me that I'd found the source of the problem, so after looking at the breakdown of this component again I figured that the problem would most likely be caused by a failed transistor. I decided to bridge pins 2 and 3 with a 200 Ohm resistor on the blue channel and give it a try.

			I powered up the board and all the blue colours were back! I did the same again for the red video channel, and replaced the faulty audio cap and now all colours are working, and audio is working properly again.

			Recommended fix for a totally missing colour on this board is to replace the relevant Konami 052535 part.<br>
			<br>
	[[PCB_Repair_Index\|Back to PCB Repair Index]]		[[PCB_Repair_Index\|Back to PCB Repair Index]]

Brad at 00:31, 6 September 2012

2012-09-06T00:31:30Z

Show changes

Brad at 00:22, 6 September 2012

2012-09-06T00:22:34Z

← Older revision		Revision as of 08:22, 6 September 2012
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			__TOC__
			===Board 1===
			<br>
	'''Repairer:''' [http://www.aussiearcade.com.au/member.php/3136-VectorGlow VectorGlow]<br>		'''Repairer:''' [http://www.aussiearcade.com.au/member.php/3136-VectorGlow VectorGlow]<br>
	'''Forum Thread:''' [http://www.aussiearcade.com.au/showthread.php/24821-Konami-s-Aliens-Repair-Log Aliens PCB Repair]<br>		'''Forum Thread:''' [http://www.aussiearcade.com.au/showthread.php/24821-Konami-s-Aliens-Repair-Log Aliens PCB Repair]<br>
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	CA324 amp at location C6 is for the speech and sound f/x <br>		CA324 amp at location C6 is for the speech and sound f/x <br>

			===Board 2===
			<br>
			'''Repairer:''' [http://www.aussiearcade.com.au/member.php/1983-Womble Womble]<br>
			'''Forum Thread:''' [http://www.aussiearcade.com.au/showthread.php/47205-Konami-Aliens-Repair-Log Aliens PCB Repair]<br>
	<br>		<br>
	[[PCB_Repair_Index\|Back to PCB Repair Index]]		[[PCB_Repair_Index\|Back to PCB Repair Index]]

Brad at 03:16, 21 August 2012

2012-08-21T03:16:46Z

← Older revision		Revision as of 11:16, 21 August 2012
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	'''Repairer:''' [http://www.aussiearcade.com.au/member.php/3136-VectorGlow VectorGlow]<br>		'''Repairer:''' [http://www.aussiearcade.com.au/member.php/3136-VectorGlow VectorGlow]<br>
	'''Forum Thread:''' [http://www.aussiearcade.com.au/showthread.php/24821-Konami-s-Aliens-Repair-Log Aliens PCB Repair]<br>		'''Forum Thread:''' [http://www.aussiearcade.com.au/showthread.php/24821-Konami-s-Aliens-Repair-Log Aliens PCB Repair]<br>
			<br>
			'''Symptom:''' Main sprites are either breaking up and parts randomly appearing all over the place, or main sprites okay but whole or complete pieces of other sprites randomly popping up<br>
			'''Diagnosis:''' Self test didn’t indicate a RAM or ROM problem, but determined that the outputs of the 6116 ‘skinny’ RAM at location I3 were intermittently flaky. That RAM later started to show up in the self test as faulty<br>
			'''Cure:''' Replaced 6116 RAM at location I3<br>
			<br>
			'''Symptom:''' Parts of the letters missing on the text of the self test screen, plus ‘sparkles’ appearing in the graphics along with variable sprite faults<br>
			'''Cure:''' Some poorly connected pins on the surface mount Konami custom ( 051962 ) at location J16<br>
	<br>		<br>

			'''Info:'''<br>

			CA324 amp at location C11 is for the in game music<br>
			CA324 amp at location C6 is for the speech and sound f/x <br>

	<br>[[PCB_Repair_Index\|Back to PCB Repair Index]]
			<br>
			[[PCB_Repair_Index\|Back to PCB Repair Index]]

Brad: Created page with "==Aliens==
2012-08-21T03:15:38Z
Created page with "==Aliens== <p><table class="infobox vevent" style="width:22em;" cellspacing="5"> <caption class="summary" style=""><b>Aliens</b></caption> <tr class="> <td colspan="2" class=..."
New page
==Aliens==

<p><table class="infobox vevent" style="width:22em;" cellspacing="5">
<caption class="summary" style=""><b>Aliens</b></caption>
<tr class=">
<td colspan="2" class="" style="text-align:center;">[[Image:marquee_aliens.png|200px]]</td>
</tr>
<tr class="">
<th scope="row" style="text-align:left; white-space: nowrap;">PCB Image</th>
<td class="" style="">Reserved</td>
</tr>
<tr class="">
<th scope="row" style="text-align:left; white-space: nowrap;">Pin Out</th>
<td class="" style="">Reserved</td>
</tr>
</table></p>

'''Repairer:''' [http://www.aussiearcade.com.au/member.php/3136-VectorGlow VectorGlow]<br>
'''Forum Thread:''' [http://www.aussiearcade.com.au/showthread.php/24821-Konami-s-Aliens-Repair-Log Aliens PCB Repair]<br>
<br>

<br>[[PCB_Repair_Index|Back to PCB Repair Index]]
Aliens