I have a 8050 drive in my collection for about 25 years, now that I have a working PET 8032-SK, wanted to see if the two will work together.
After a bit of a cleaning, powered it up, middle led stays green, Drive 1 led lights up long, goes off, lights up short, then stays off.
Drive 0 led never lights up (the led is good, as on power off I can see a faint light on all three leds). Never operated such drives so have no idea how it should behave.
According to the manual on page 12, all three LED's should flash, so I wonder what to check next. Initially I thought it's the 6532's according to the flash codes, but as it's not repeating the flashes, I assume there are no errors on power up diagnostics.
Keeping the drive powered for a minute, something blew inside, probably a capacitor by the smell, I still not found which one (there was smoke between the transformer and the 15mF big green cap when opening it up). The LED's behavior has not changed after a power cycle. AC voltage with no load on the transformer checks out, maybe a bit exceeding specs on pin 5 & 6 with the 11.2V measured. DC +12v, +5v checks out on pins of P3 even if CR5 and CR6 are hot to the touch (can't keep hand on them - LE: as they were working but had a crack, replaced both with BY255, now it's cool). Switching UE1 with UC1 no change. Service manual is not really helpful other then providing the schematics.
I'm afraid hooking it up to a working PET like this, so any suggestion is welcomed. Board assy 8050002 and 8050006.
After a bit of a cleaning, powered it up, middle led stays green, Drive 1 led lights up long, goes off, lights up short, then stays off.
Drive 0 led never lights up (the led is good, as on power off I can see a faint light on all three leds). Never operated such drives so have no idea how it should behave.
According to the manual on page 12, all three LED's should flash, so I wonder what to check next. Initially I thought it's the 6532's according to the flash codes, but as it's not repeating the flashes, I assume there are no errors on power up diagnostics.
Keeping the drive powered for a minute, something blew inside, probably a capacitor by the smell, I still not found which one (there was smoke between the transformer and the 15mF big green cap when opening it up). The LED's behavior has not changed after a power cycle. AC voltage with no load on the transformer checks out, maybe a bit exceeding specs on pin 5 & 6 with the 11.2V measured. DC +12v, +5v checks out on pins of P3 even if CR5 and CR6 are hot to the touch (can't keep hand on them - LE: as they were working but had a crack, replaced both with BY255, now it's cool). Switching UE1 with UC1 no change. Service manual is not really helpful other then providing the schematics.
I'm afraid hooking it up to a working PET like this, so any suggestion is welcomed. Board assy 8050002 and 8050006.
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