PCB Repair Logs Jungle King Bootleg - Revision history

Brad at 00:25, 15 August 2012

2012-08-15T00:25:36Z

← Older revision		Revision as of 08:25, 15 August 2012
Line 52:		Line 52:
	Coin input was not working on coin 1 then coin 2 later died. Long story short seems they are both connected to 2 large transistors that would appear to be dead which in turn is connected to a 74ls08 IC28. Cutting the pins which lead to the Transistors fixed the coin problems. These pins should be at a high state but were stuck low. Pin 3,4,9 and 10 were removed. Bit of a bodgy fix but I have no idea why the circut was made that way. The credit will not come up until after you take you finger off the coin button on the test rig this is how it should be.		Coin input was not working on coin 1 then coin 2 later died. Long story short seems they are both connected to 2 large transistors that would appear to be dead which in turn is connected to a 74ls08 IC28. Cutting the pins which lead to the Transistors fixed the coin problems. These pins should be at a high state but were stuck low. Pin 3,4,9 and 10 were removed. Bit of a bodgy fix but I have no idea why the circut was made that way. The credit will not come up until after you take you finger off the coin button on the test rig this is how it should be.

	~~Summery~~.		Summary.
	1 bad CPU, 3 bad 74ls74s and 2 bad AY-3-8910's		1 bad CPU, 3 bad 74ls74s and 2 bad AY-3-8910's

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

Brad at 00:25, 15 August 2012

2012-08-15T00:25:23Z

← Older revision		Revision as of 08:25, 15 August 2012
Line 20:		Line 20:
	<br>		<br>

			3 Layer Bootleg with 56 pin edge connector.
			Big board this one and in Immaculate condition.
			Thanks to Jomac for the board

			Board dead no activity from any chip on the board. No Clock either.

			Found a bad Z80-A CPU and 2 dead 74ls74s on the bottom board IC88 and IC75. The ICs were Fairchild. There are no other Fairchild chips ob the board other than the bottom cpu board I'm betting they are the problem.(and I was right)

			Instead of a dead black screen now I get a blue screen. I decided to try putting it in test mode and got. The board is now alive and is pulsing normally.
			RAM CHECK MODE
			NO RAM ERROR.

			Just found out this is normal lol but its a good sign.

			Found another bad 74ls74 IC89 with dead outputs.
			Board now fires up and is running .

			Sound.

			Missing music and other sound effects im not sure which. Credit noise is there and when Tarzan jumps from tree to tree and splat noise when he hits the ground.

			There are 2 out of the 4 bad AY-3-8910...no suprises there.

			IC 50 credit sound.Jump sound
			IC 63 music
			IC 51 splat noise-rope swing
			IC 49 ????

			The Tarzan call is working.

			Coin input was not working on coin 1 then coin 2 later died. Long story short seems they are both connected to 2 large transistors that would appear to be dead which in turn is connected to a 74ls08 IC28. Cutting the pins which lead to the Transistors fixed the coin problems. These pins should be at a high state but were stuck low. Pin 3,4,9 and 10 were removed. Bit of a bodgy fix but I have no idea why the circut was made that way. The credit will not come up until after you take you finger off the coin button on the test rig this is how it should be.

			Summery.
			1 bad CPU, 3 bad 74ls74s and 2 bad AY-3-8910's

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

Brad: Created page with "==Jungle King (Bootleg)==
2012-08-15T00:23:55Z
Created page with "==Jungle King (Bootleg)== <p><table class="infobox vevent" style="width:22em;" cellspacing="5"> <caption class="summary" style=""><b>Jungle King (Bootleg)</b></caption> <tr c..."
New page
==Jungle King (Bootleg)==

<p><table class="infobox vevent" style="width:22em;" cellspacing="5">
<caption class="summary" style=""><b>Jungle King (Bootleg)</b></caption>
<tr class=">
<td colspan="2" class="" style="text-align:center;">[[Image:marquee_jungle_king.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/5809-Jungle-King Jungle King (Bootleg) PCB Repair]<br>
<br>

<br>[[PCB_Repair_Index|Back to PCB Repair Index]]
Jungle King (Bootleg)