I finally have my Astron Belt put together and am now focusing on getting it working. As it stands now, I am not getting much signs of life, so any help is appreciated.
*What I have tried or verified*
- The 3 main fuses are fine
- The laserdisc player is getting power (twice two) and does turn on,
but doesn't start the disc on its own (if I hit play it spins).
- Verified the monitor is good
- Tested all voltages. As first, the +5v line was showing +10v, but
all other lines were showing less than a volt. Replaced the switcher
with a new and saw similar results. Went back to the original and
tried connecting the various wires one at a time to see if one is
dragging down the PS. Found all lines are closer to their respective
voltages now (+5v is a little high, while -12v is a tad low). However,
with +12v disconnected (no load) it reads +11.98v, when attached it
drops to +0.3. I detached two of the three wires and still see it
dropping (plan to try the third wire shortly). The +5v LED is lit on
the boardset.
- I made the power connector myself, based on specific details from
another collector with the game.
- Verified the correct # of PROMs and set is installed (Hitachi), but have
not verified each PROM against as master image.
- The marquee light works.
There is no video on the monitor (the monitor is on and with the black level turned-up I can see white), no sounds, etc. The cable is original, but I don't know if it was altered. One end was verified, but I don't know what the monitor side of the cable is suppose to be pinned as, so I guessed. However, since I get nothing (at all) on the monitor, I don't think the cable is the issue.
I realize this isn't much to go on, but anyone have any ideas on what to check next? I can't determine if the PS +12v is bad or if something on the boardset is dragging it down. Should I get video even without the +12v, either from the laserdisc player or the CPU board? I tried powering the game without the coin door, control panel, speakers, etc. being attached to the harness, but nothing changed. detaching the +12v from the PS did nothing to help it boot either.
Scott C.
*What I have tried or verified*
- The 3 main fuses are fine
- The laserdisc player is getting power (twice two) and does turn on,
but doesn't start the disc on its own (if I hit play it spins).
- Verified the monitor is good
- Tested all voltages. As first, the +5v line was showing +10v, but
all other lines were showing less than a volt. Replaced the switcher
with a new and saw similar results. Went back to the original and
tried connecting the various wires one at a time to see if one is
dragging down the PS. Found all lines are closer to their respective
voltages now (+5v is a little high, while -12v is a tad low). However,
with +12v disconnected (no load) it reads +11.98v, when attached it
drops to +0.3. I detached two of the three wires and still see it
dropping (plan to try the third wire shortly). The +5v LED is lit on
the boardset.
- I made the power connector myself, based on specific details from
another collector with the game.
- Verified the correct # of PROMs and set is installed (Hitachi), but have
not verified each PROM against as master image.
- The marquee light works.
There is no video on the monitor (the monitor is on and with the black level turned-up I can see white), no sounds, etc. The cable is original, but I don't know if it was altered. One end was verified, but I don't know what the monitor side of the cable is suppose to be pinned as, so I guessed. However, since I get nothing (at all) on the monitor, I don't think the cable is the issue.
I realize this isn't much to go on, but anyone have any ideas on what to check next? I can't determine if the PS +12v is bad or if something on the boardset is dragging it down. Should I get video even without the +12v, either from the laserdisc player or the CPU board? I tried powering the game without the coin door, control panel, speakers, etc. being attached to the harness, but nothing changed. detaching the +12v from the PS did nothing to help it boot either.
Scott C.
