Difference between revisions of "PCB Repair Logs Shadow Dancer"
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'''Forum Thread:''' [http://www.aussiearcade.com.au/showthread.php/23439-Shadow-Dancer-Repair-Log Shadow Dancer PCB Repair]<br> | '''Forum Thread:''' [http://www.aussiearcade.com.au/showthread.php/23439-Shadow-Dancer-Repair-Log Shadow Dancer PCB Repair]<br> | ||
<br> | <br> | ||
'''Symptom:''' Many letters displaying the wrong letter and some background graphics corrupted<br> | |||
'''Diagnosis:''' The test mode didn’t have a very comprehensive RAM test so swapped in the ROM board, protected 68000 and IC4 from Moonwalker and ran that. The Memory Test indicated that RAMs at IC33, 34, 35 and 36 were faulty, but in fact the LS374 at IC37 had bad outputs<br> | |||
Layout of RAM IC tests for Moonwalker running on this board:<br> | |||
<br> | |||
IC5 IC6<br> | |||
IC16 IC17<br> | |||
IC33 IC34<br> | |||
IC35 IC36<br> | |||
IC41 IC42<br> | |||
IC69 IC70<br> | |||
<br> | |||
Written down the above as with the wrong letters being used in some cases it was hard to make out what was being displayed, so also ran the test on Moonwalker itself to determine the layout. | |||
<br>[[PCB_Repair_Index|Back to PCB Repair Index]] | <br>[[PCB_Repair_Index|Back to PCB Repair Index]] | ||
Revision as of 13:08, 20 August 2012
Shadow Dancer
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| PCB Image | Reserved |
|---|---|
| Pin Out | Reserved |
Repairer: VectorGlow
Forum Thread: Shadow Dancer PCB Repair
Symptom: Many letters displaying the wrong letter and some background graphics corrupted
Diagnosis: The test mode didn’t have a very comprehensive RAM test so swapped in the ROM board, protected 68000 and IC4 from Moonwalker and ran that. The Memory Test indicated that RAMs at IC33, 34, 35 and 36 were faulty, but in fact the LS374 at IC37 had bad outputs
Layout of RAM IC tests for Moonwalker running on this board:
IC5 IC6
IC16 IC17
IC33 IC34
IC35 IC36
IC41 IC42
IC69 IC70
Written down the above as with the wrong letters being used in some cases it was hard to make out what was being displayed, so also ran the test on Moonwalker itself to determine the layout.
