starfighter2
Member
I have display issues with a tempest that I got not working. the game seems to play blind, cannot see anything in test mode. The following was the things I tried today. If anyone has an idea wht to look at next I would appriciate any recommendations.
1. Test the Tempest monitor: was able to connect to my start wars arcade game with WG6100 game and the video was really good. So the monitor should not be the issue.
2. Test tempest board with star wars WG6100 monitor. Get the same issues
3. Test tempest board with aux board connected. The only thing that will display is the tempest logo that starts of small then grows with three different colors. Other than that nothing
4. Put into test mode, will not display anything.
5. Increase screen, see only dot and can see red spot killer lot on
6. There was a low hum, so since I had a cap kit for the ARII, did that, no more hum but no change to the video. I also reflowed all the connectors on the ARII board
7. Reflowed connectors on the aux and main board, no change
8. Also had a backup CPU and changes that, no change
9. Tested without the aux board in test mode, no video
10. Tested all the ROMs on the main board all checksums are the same except 113 which in MAME is 00028392 and the ROM 000282A9, but I saved the rom to the zip file and MAME played the game with no issues.
11. Also one of the transistors in the video output section was bad, replaced that with no change.
12. Tested to verify that both ground and power rails had continuity for all columns
13. On the board I get the following voltages:
a. +5 tab = 5.06
b. -6.8 tab = 6.77
c. -15 tab = -15.31
d. X out tab = -2.03
e. Y out = .45
f. +15 tab = 15.10
g. DAC +5 tab = 5.06
Let me know if you have any other thoughts on what and how to test next
1. Test the Tempest monitor: was able to connect to my start wars arcade game with WG6100 game and the video was really good. So the monitor should not be the issue.
2. Test tempest board with star wars WG6100 monitor. Get the same issues
3. Test tempest board with aux board connected. The only thing that will display is the tempest logo that starts of small then grows with three different colors. Other than that nothing
4. Put into test mode, will not display anything.
5. Increase screen, see only dot and can see red spot killer lot on
6. There was a low hum, so since I had a cap kit for the ARII, did that, no more hum but no change to the video. I also reflowed all the connectors on the ARII board
7. Reflowed connectors on the aux and main board, no change
8. Also had a backup CPU and changes that, no change
9. Tested without the aux board in test mode, no video
10. Tested all the ROMs on the main board all checksums are the same except 113 which in MAME is 00028392 and the ROM 000282A9, but I saved the rom to the zip file and MAME played the game with no issues.
11. Also one of the transistors in the video output section was bad, replaced that with no change.
12. Tested to verify that both ground and power rails had continuity for all columns
13. On the board I get the following voltages:
a. +5 tab = 5.06
b. -6.8 tab = 6.77
c. -15 tab = -15.31
d. X out tab = -2.03
e. Y out = .45
f. +15 tab = 15.10
g. DAC +5 tab = 5.06
Let me know if you have any other thoughts on what and how to test next