PCB Repair Logs Moon Patrol - Revision history

Brad at 04:33, 6 February 2013

2013-02-06T04:33:53Z

← Older revision		Revision as of 12:33, 6 February 2013
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	<tr class=">		<tr class=">
	<td colspan="2" class="" style="text-align:center;">[[Image:marquee_moon_patrol.jpg\|200px]]</td>		<td colspan="2" class="" style="text-align:center;">[[Image:marquee_moon_patrol.jpg\|200px]]</td>
			</tr>
			<tr class="">
			<th scope="row" style="text-align:left; white-space: nowrap;">Manufacturer</th>
			<td class="" style="">[[PCB_Manufacturers_Irem\|Irem]]</td>
			</tr>
			<tr class="">
			<th scope="row" style="text-align:left; white-space: nowrap;">Year</th>
			<td class="" style="">1982</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_Moon_Patrol\|Moon Patrol]]</td>
	</tr>		</tr>

Brad at 04:04, 5 September 2012

2012-09-05T04:04:32Z

← Older revision		Revision as of 12:04, 5 September 2012
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	Board MP-712A		Board MP-712A

	This is the Sound Board<br>		This is the Sound Board<br>
	'''Problem:''' no sound at all.<br>		'''Problem:''' no sound at all.<br>
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	update: 3/12/05		'''update:''' 3/12/05<br>
	Board ran for about 3 hours today before going into self destruct mode again. Screen now is full of "M"s the buggy also fires M's upwards. The problem goes away when you turn the voltage right down.		Board ran for about 3 hours today before going into self destruct mode again. Screen now is full of "M"s the buggy also fires M's upwards. The problem goes away when you turn the voltage right down.

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	My attention turned to the 74ls374@4D going through the pins with the logic probe i noticed pin 3 was erratic i tried shorting pin 3 and 4 together and it cleared up the screen. Instead of actually checking the datasheet to see if it was a input or output i proceeded to replace the 374. surprise surprise no change...in fact it was worse because when you turned down the voltage the problem doesn't go away at all now.		My attention turned to the 74ls374@4D going through the pins with the logic probe i noticed pin 3 was erratic i tried shorting pin 3 and 4 together and it cleared up the screen. Instead of actually checking the datasheet to see if it was a input or output i proceeded to replace the 374. surprise surprise no change...in fact it was worse because when you turned down the voltage the problem doesn't go away at all now.

	Pin 3 of the 374 a input was also sitting high now doing nothing, I traced it back to a 74LS365@5d a 6-bit 3-state non inverting buffer/line driver which is right next to it pin 9. **** I don't have any of these, I tried a similar chip a 367 2/4-bit 3-state non inverting buffer/line driver. which cleared up the problem. Almost the same chip..almost.		Pin 3 of the 374 a input was also sitting high now doing nothing, I traced it back to a 74LS365@5d a 6-bit 3-state non inverting buffer/line driver which is right next to it pin 9. **** I don't have any of these, I tried a similar chip a 367 2/4-bit 3-state non inverting buffer/line driver. which cleared up the problem. Almost the same chip..almost.<br>
	'''Fix:''' 74LS365@5D<br>		'''Fix:''' 74LS365@5D<br>
	<br>		<br>

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

Brad at 04:03, 5 September 2012

2012-09-05T04:03:47Z

← Older revision		Revision as of 12:03, 5 September 2012
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	'''Fix:''' Green cap @ C37 104k leg was broken.<br>		'''Fix:''' Green cap @ C37 104k leg was broken.<br>
	<br>		<br>
	Board MP-712C		Board MP-712C<br>
	This is the character board, buggy aliens ships etc. This board had so many faults it wasn't funny, just as you thought I had fixed it another problem would surface. I can only nail this down to how old the board is and how badly a lot of the ICs were corroded.		This is the character board, buggy aliens ships etc. This board had so many faults it wasn't funny, just as you thought I had fixed it another problem would surface. I can only nail this down to how old the board is and how badly a lot of the ICs were corroded.

	I wont be able to list all the problems as there were too many. The board was completely dead as the CPU and Sound boards were. Looking at the the board there were a few chips that had no markings on them obviously damaged from heat. I also noticed the board was shorted from +5 to neg so basically it was a matter of finding the bad chips. I started replacing all the chips that marking were burnt off.		I wont be able to list all the problems as there were too many. The board was completely dead as the CPU and Sound boards were. Looking at the the board there were a few chips that had no markings on them obviously damaged from heat. I also noticed the board was shorted from +5 to neg so basically it was a matter of finding the bad chips. I started replacing all the chips that marking were burnt off.

	Board Mp-712D		Board Mp-712D<br>
	This board controls the background graphics and scoreboard.		This board controls the background graphics and scoreboard.

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	The colour prom at A2 legs were rusted and broke off so I had to get a replacement.		The colour prom at A2 legs were rusted and broke off so I had to get a replacement.

	Ok now the board fired up but background was messed up and sometimes blacked out, no scoreboard and no ground.		Ok now the board fired up but background was messed up and sometimes blacked out, no scoreboard and no ground. 74LS157@L2 fixed the background and 74LS157@E2 fixed the scoreboard and ground.
	74LS157@L2 fixed the background and		Ok now we have all the back and foreground back a new problem arises.
	74LS157@E2 fixed the scoreboard and ground.
	Ok now we have all the back and foreground back a new problem arises.
	Background flashing badly.		Background flashing badly.
	74LS86@L6		74LS86@L6
	Flashing has stopped hover one problem remains. the furtherest scrolling background is jittering like some sort of memory loop.		Flashing has stopped hover one problem remains. the furtherest scrolling background is jittering like some sort of memory loop.<br>
	'''Fixed:''' 74LS175@M5<br>		'''Fixed:''' 74LS175@M5<br>
	<br>		<br>

Brad at 04:02, 5 September 2012

2012-09-05T04:02:57Z

← Older revision		Revision as of 12:02, 5 September 2012
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	Board MP-712A		Board MP-712A
	This is the Sound Board		This is the Sound Board<br>
	'''Problem:''' no sound at all.<br>		'''Problem:''' no sound at all.<br>
	'''Fix:''' The cpu and two 8910 sound chips were all bad replacing them fixed the board.<br>		'''Fix:''' The cpu and two 8910 sound chips were all bad replacing them fixed the board.<br>

Brad at 04:02, 5 September 2012

2012-09-05T04:02:25Z

← Older revision		Revision as of 12:02, 5 September 2012
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	Board MP-712A		Board MP-712A
	This is the Sound Board		This is the Sound Board
	'''Problem:''' no sound at all.		'''Problem:''' no sound at all.<br>
	'''Fix:''' The cpu and two 8910 sound chips were all bad replacing them fixed the board.		'''Fix:''' The cpu and two 8910 sound chips were all bad replacing them fixed the board.<br>
	'''Update:''' after the board was fixed it has been going into meltdown mode. After a few hours the sound decided to die.		'''Update:''' after the board was fixed it has been going into meltdown mode. After a few hours the sound decided to die.<br>
			<br>
	I started by replacing all the caps which ddint fix the problem however fixed the crackle and amp from getting too hot. However when the board was cold the sound would run for 10-20 seconds then crackle out. The problem was a 74LS138@1E		I started by replacing all the caps which ddint fix the problem however fixed the crackle and amp from getting too hot. However when the board was cold the sound would run for 10-20 seconds then crackle out. The problem was a 74LS138@1E

	'''Problem:''' No explosion noise.		'''Problem:''' No explosion noise.<br>
	'''Fix:''' Green cap @ C37 104k leg was broken.		'''Fix:''' Green cap @ C37 104k leg was broken.<br>
			<br>
	Board MP-712C		Board MP-712C
	This is the character board, buggy aliens ships etc. This board had so many faults it wasn't funny, just as you thought I had fixed it another problem would surface. I can only nail this down to how old the board is and how badly a lot of the ICs were corroded.		This is the character board, buggy aliens ships etc. This board had so many faults it wasn't funny, just as you thought I had fixed it another problem would surface. I can only nail this down to how old the board is and how badly a lot of the ICs were corroded.
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	74LS86@L6		74LS86@L6
	Flashing has stopped hover one problem remains. the furtherest scrolling background is jittering like some sort of memory loop.		Flashing has stopped hover one problem remains. the furtherest scrolling background is jittering like some sort of memory loop.
	'''Fixed:''' 74LS175@M5		'''Fixed:''' 74LS175@M5<br>
			<br>
	Board is now fixed.		Board is now fixed.

	'''Notes:'''		'''Notes:'''<br>
	This board has in fact the Moon Ranger roms on it. When I was fixing the boards the Moon Ranger looked messed up and spelt out Moon Rangor.		This board has in fact the Moon Ranger roms on it. When I was fixing the boards the Moon Ranger looked messed up and spelt out Moon Rangor.
	It is the same for every screen shot I have seen on the net. Found out by accident when I was working on the bottom board that Moon Ranger requires a different rom No.11 on the bottom board. when you mixed moon ranger roms on the bottom and moon patrol the T is messed up in patrol. I assumed this was a bad rom but after fixing all boards this clears up the Ranger .		It is the same for every screen shot I have seen on the net. Found out by accident when I was working on the bottom board that Moon Ranger requires a different rom No.11 on the bottom board. when you mixed moon ranger roms on the bottom and moon patrol the T is messed up in patrol. I assumed this was a bad rom but after fixing all boards this clears up the Ranger .
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	Pin 3 of the 374 a input was also sitting high now doing nothing, I traced it back to a 74LS365@5d a 6-bit 3-state non inverting buffer/line driver which is right next to it pin 9. **** I don't have any of these, I tried a similar chip a 367 2/4-bit 3-state non inverting buffer/line driver. which cleared up the problem. Almost the same chip..almost.		Pin 3 of the 374 a input was also sitting high now doing nothing, I traced it back to a 74LS365@5d a 6-bit 3-state non inverting buffer/line driver which is right next to it pin 9. **** I don't have any of these, I tried a similar chip a 367 2/4-bit 3-state non inverting buffer/line driver. which cleared up the problem. Almost the same chip..almost.
	'''Fix:''' 74LS365@5D		'''Fix:''' 74LS365@5D<br>
	<br>		<br>

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

Brad at 04:01, 5 September 2012

2012-09-05T04:01:44Z

@@ Line 18: / Line 18: @@
 '''Forum Thread:''' [http://www.aussiearcade.com.au/showthread.php/42164-Moon-Patrol-Repair Moon Patrol PCB Repair]<br>
 <br>
 <br>
 <br>[[PCB_Repair_Index|Back to PCB Repair Index]]

Brad: Created page with "==Moon Patrol==
2012-09-05T03:58:51Z
Created page with "==Moon Patrol== <p><table class="infobox vevent" style="width:22em;" cellspacing="5"> <caption class="summary" style=""><b>Moon Patrol</b></caption> <tr class="> <td colspan="..."
New page
==Moon Patrol==
<p><table class="infobox vevent" style="width:22em;" cellspacing="5">
<caption class="summary" style=""><b>Moon Patrol</b></caption>
<tr class=">
<td colspan="2" class="" style="text-align:center;">[[Image:marquee_moon_patrol.jpg|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/1-Arcade-King Arcade King]<br>
'''Forum Thread:''' [http://www.aussiearcade.com.au/showthread.php/42164-Moon-Patrol-Repair Moon Patrol PCB Repair]<br>
<br>

<br>

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