Difference between revisions of "PCB Repair Logs Black Dragon"
From Aussie Arcade Wiki
Jump to navigationJump to search (Created page with "==Black Dragon== <p><table class="infobox vevent" style="width:22em;" cellspacing="5"> <caption class="summary" style=""><b>Black Dragon</b></caption> <tr class="> <td colspa...") |
m |
||
| Line 19: | Line 19: | ||
'''Forum Thread:''' [http://www.aussiearcade.com.au/showthread.php/23513-Black-Dragon-Repair Black Dragon PCB Repair]<br> | '''Forum Thread:''' [http://www.aussiearcade.com.au/showthread.php/23513-Black-Dragon-Repair Black Dragon PCB Repair]<br> | ||
<br> | <br> | ||
Brad's Original Black Dragon (Tiger) PCB | |||
PCB was missing 2 roms a 27512 @ 9B and 27256 @ 2N | |||
The rom at 2N is for all the in game foreground text and 9B is part of the background. | |||
First things first replaced the 2 missing roms. | |||
'''Problem:''' Foreground text is all messed up.<br> | |||
<br> | |||
<br> | |||
[[File:Pcb repair black dragon 1.jpg]] | |||
<br> | |||
<br> | |||
'''Fix:''' Pin 23 (A11) on rom 2N was stuck High. Tracked back to pin 2 of a 74ls253 @ 3N. Replacing the chip fixed the problem.<br> | |||
'''Problem:''' Character Graphics have faint horizontal lines through them.<br> | |||
<br> | |||
<br> | |||
[[File:Pcb repair black dragon 2.jpg]] | |||
<br> | |||
<br> | |||
'''Fix:''' Faulty 74ls253 @ 2K. Both chips were TI (Texas Instruments) branded IC's<br> | |||
<br><br> | |||
[[File:Pcb repair black dragon 3.jpg]] | |||
<br> | |||
<br> | |||
Board now 100% | |||
<br>[[PCB_Repair_Index|Back to PCB Repair Index]] | <br>[[PCB_Repair_Index|Back to PCB Repair Index]] | ||
Revision as of 07:29, 21 August 2012
Black Dragon
| 200px | |
| PCB Image | Reserved |
|---|---|
| Pin Out | Reserved |
Repairer: Arcade King
Forum Thread: Black Dragon PCB Repair
Brad's Original Black Dragon (Tiger) PCB
PCB was missing 2 roms a 27512 @ 9B and 27256 @ 2N
The rom at 2N is for all the in game foreground text and 9B is part of the background.
First things first replaced the 2 missing roms.
Problem: Foreground text is all messed up.
Fix: Pin 23 (A11) on rom 2N was stuck High. Tracked back to pin 2 of a 74ls253 @ 3N. Replacing the chip fixed the problem.
Problem: Character Graphics have faint horizontal lines through them.
Fix: Faulty 74ls253 @ 2K. Both chips were TI (Texas Instruments) branded IC's
Board now 100%
