PCB Repair Logs Millipede - Revision history

Brad at 04:08, 6 February 2013

2013-02-06T04:08:12Z

← Older revision		Revision as of 12:08, 6 February 2013
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	<tr class=">		<tr class=">
	<td colspan="2" class="" style="text-align:center;">[[Image:marquee_millipede.png\|200px]]</td>		<td colspan="2" class="" style="text-align:center;">[[Image:marquee_millipede.png\|200px]]</td>
			</tr>
			<tr class="">
			<th scope="row" style="text-align:left; white-space: nowrap;">Manufacturer</th>
			<td class="" style="">[[PCB_Manufacturers_Atari\|Atari]]</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_Millipede\|Millipede]]</td>
	</tr>		</tr>
	</table></p>		</table></p>

Brad at 00:05, 15 August 2012

2012-08-15T00:05:28Z

← Older revision		Revision as of 08:05, 15 August 2012
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	Usisng a modern standard Arcade PSU (+5,+12 and -5) use the +12 volts across for the +22 and +10.3 volts.<br>		Usisng a modern standard Arcade PSU (+5,+12 and -5) use the +12 volts across for the +22 and +10.3 volts.<br>

	I originally had +5 going to the 10.3 which leads to a TL082~~. This~~ is not enough. I ****ed around for ages wondering why there was no video and the CPU was not running.		I originally had +5 going to the 10.3 which leads to a TL082 and this is not enough. I ****ed around for ages wondering why there was no video and the CPU was not running.
	I disabled the reset circuit by lifting a resistor to make the reset line go high. ~~this~~ made the board start watchdogging. Adding 12V to the line got the circuit running properly.		I disabled the reset circuit by lifting a resistor to make the reset line go high. This made the board start watchdogging. Adding 12V to the line got the circuit running properly.

	When first turning on the board all you see is a white flash then a dead blank screen. I later found out this was because I had wired the RGB at the wrong end of the connector(dickhead me) there still would have been nothing because of the fried Hsync circuit.		When first turning on the board all you see is a white flash then a dead blank screen. I later found out this was because I had wired the RGB at the wrong end of the connector(dickhead me) there still would have been nothing because of the fried Hsync circuit.
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	Fix: Bad 74ls74@H6 and bad 74ls07@2D pin 1 ans 2 of the 07 were shorted.		Fix: Bad 74ls74@H6 and bad 74ls07@2D pin 1 ans 2 of the 07 were shorted.

	The board is showing a heap of sprites and garbage on the screen. The cpu is watchdogging. Turns out a graphic rom was swapped for a program rom, Kicking myself I didn't notice sooner		The board is showing a heap of sprites and garbage on the screen. The cpu is watchdogging. Turns out a graphic rom was swapped for a program rom. Kicking myself I didn't notice sooner

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

Brad at 00:04, 15 August 2012

2012-08-15T00:04:42Z

← Older revision		Revision as of 08:04, 15 August 2012
Line 22:		Line 22:
	Original Atari Millipede. Gavin got this board from the states for me.		Original Atari Millipede. Gavin got this board from the states for me.

	'''Beginning Notes:'''		'''Beginning Notes:'''<br>
	You need the +22 volts for video to work.		You need the +22 volts for video to work.<br>
	You need the +10.3 volts for the reset circuit to work.		You need the +10.3 volts for the reset circuit to work.<br>
	The -22 is for the earom to save the high scores.		The -22 is for the earom to save the high scores.<br>
	Usisng a modern standard Arcade PSU (+5,+12 and -5) use the +12 volts across for the +22 and		Usisng a modern standard Arcade PSU (+5,+12 and -5) use the +12 volts across for the +22 and +10.3 volts.<br>
	+10.3 volts.
	I originally had +5 going to the 10.3 which leads to a TL082. This is not enough. I ****ed around for ages wondering why there was no video and the CPU was not running.		I originally had +5 going to the 10.3 which leads to a TL082. This is not enough. I ****ed around for ages wondering why there was no video and the CPU was not running.
	I disabled the reset circuit by lifting a resistor to make the reset line go high. this made the board start watchdogging. Adding 12V to the line got the circuit running properly.		I disabled the reset circuit by lifting a resistor to make the reset line go high. this made the board start watchdogging. Adding 12V to the line got the circuit running properly.

Brad at 00:03, 15 August 2012

2012-08-15T00:03:43Z

← Older revision		Revision as of 08:03, 15 August 2012
Line 20:		Line 20:

	<br>		<br>
			Original Atari Millipede. Gavin got this board from the states for me.

			'''Beginning Notes:'''
			You need the +22 volts for video to work.
			You need the +10.3 volts for the reset circuit to work.
			The -22 is for the earom to save the high scores.
			Usisng a modern standard Arcade PSU (+5,+12 and -5) use the +12 volts across for the +22 and
			+10.3 volts.
			I originally had +5 going to the 10.3 which leads to a TL082. This is not enough. I ****ed around for ages wondering why there was no video and the CPU was not running.
			I disabled the reset circuit by lifting a resistor to make the reset line go high. this made the board start watchdogging. Adding 12V to the line got the circuit running properly.

			When first turning on the board all you see is a white flash then a dead blank screen. I later found out this was because I had wired the RGB at the wrong end of the connector(dickhead me) there still would have been nothing because of the fried Hsync circuit.

			Found a 259 @ 12E that was super heating with outputs dead. Replaced it. I found there was no Hsync.
			Fix: Bad 74ls74@H6 and bad 74ls07@2D pin 1 ans 2 of the 07 were shorted.

			The board is showing a heap of sprites and garbage on the screen. The cpu is watchdogging. Turns out a graphic rom was swapped for a program rom, Kicking myself I didn't notice sooner

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

Brad: Created page with "==Millipede==
2012-08-15T00:02:31Z
Created page with "==Millipede== <p><table class="infobox vevent" style="width:22em;" cellspacing="5"> <caption class="summary" style=""><b>Millipede</b></caption> <tr class="> <td colspan="2" ..."
New page
==Millipede==

<p><table class="infobox vevent" style="width:22em;" cellspacing="5">
<caption class="summary" style=""><b>Millipede</b></caption>
<tr class=">
<td colspan="2" class="" style="text-align:center;">[[Image:marquee_millipede.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/1-Arcade-King Arcade King]<br>
'''Forum Thread:''' [http://www.aussiearcade.com.au/showthread.php/5811-Millipede Millipede PCB Repair]<br>

<br>

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Millipede