bromley.tech Posted January 29, 2015 Share Posted January 29, 2015 HI all, I was wondering whether I could have some help with trying to get our schools Zero 88 Betapack 3 working. We regularly use it, and its only now, days before our school show that channel 1 of one dimmer and channel 5 of another don't seem to be working. We've checked everything (or at least what I know of) to solve the problem. We've checked to see whether it's the light, but that works, we've checked the circuit, but that works, I've double checked my soft and hard patching, and that works, leaving only the dimmer. I don't know whether its a fuse thats gone, but I believe that is on a mini RCB. Is it fixable, or an internal problem for a professional to sort out? Hope someone can help :-) Aiden Link to comment Share on other sites More sharing options...
jonhole Posted January 29, 2015 Share Posted January 29, 2015 Give our service department a call tomorrow - they can usually diagnose problems over the phone - 01633 833101 Link to comment Share on other sites More sharing options...
MATTJSTMARYS Posted January 29, 2015 Share Posted January 29, 2015 We had something similar the other day. Someone had turned preheat down to zero when trying to manually control channels. Matt Link to comment Share on other sites More sharing options...
dmoorcroft Posted January 30, 2015 Share Posted January 30, 2015 I'd try using the dimmer pack manually to rule out patching / desk issues If not all channels output then I'd check that someone hasnt set the topset to "0" The manual is pretty handy -clicky Link to comment Share on other sites More sharing options...
constabeats Posted February 6, 2015 Share Posted February 6, 2015 I've had this issed with the BetaPacks before. Was a setting on it which prevented the channel from coming on. I called the support and they walked me through there and then. Tech Support at Zero is great! Link to comment Share on other sites More sharing options...
SamDram Posted February 9, 2015 Share Posted February 9, 2015 Sometimes it can be as simple as having the wrong setting on the dimmerpack. As mentioned above, check the Topset of the affected channels is not set to 0 (should be 100...assuming you want to be able to reach 100% load).Also, make sure they are patched on the dimmer correctly. Best option yet, give Zero88 a call. They are good guys! Link to comment Share on other sites More sharing options...
Nicktaylor Posted February 18, 2015 Share Posted February 18, 2015 A betapack 3 I have has decided to have channel five and six effectively switch on and off. I have looked through the control modes and they are both on normal. I have also I think reset the unit but the channel stil goes to full at maybe 5% of DMX. Any ideas otherwise onto Zero 88 Link to comment Share on other sites More sharing options...
IRW Posted February 18, 2015 Share Posted February 18, 2015 A betapack 3 I have has decided to have channel five and six effectively switch on and off. I have looked through the control modes and they are both on normal. I have also I think reset the unit but the channel stil goes to full at maybe 5% of DMX. Any ideas otherwise onto Zero 88 Triac! Link to comment Share on other sites More sharing options...
timsabre Posted February 18, 2015 Share Posted February 18, 2015 Not triac, if it was that it would be stuck on full all the time. It's something to do with the ramp generator which runs pairs of channels. But I can't remember the details. Link to comment Share on other sites More sharing options...
boatman Posted February 18, 2015 Share Posted February 18, 2015 It's either the 100k resistors or the opto-isolator in the sync circuit. Whilst you've got it open change the resistors in the sync circuit for channels 3 & 4 as well. Link to comment Share on other sites More sharing options...
DrV Posted February 18, 2015 Share Posted February 18, 2015 It's either the 100k resistors or the opto-isolator in the sync circuit. Whilst you've got it open change the resistors in the sync circuit for channels 3 & 4 as well.You're thinking of the older Betapack 1 & 2. The 3 has an altogether different arrangement - 3 separate mains transformers, 3 separate power supplies and a microcontroller for each pair of channels. I've never seen this symptom but there is a 4M7 0.5W resistor in each sync circuit which might be to blame (R30 for channels 5 & 6). Also look for bulged electrolytic caps at that end of the board. You could also try swapping the microcontroller with the one next door (IC9 & 10) - they are on sockets. Dave. Link to comment Share on other sites More sharing options...
IRW Posted February 19, 2015 Share Posted February 19, 2015 Not triac, if it was that it would be stuck on full all the time. Oops! Missed that bit! Link to comment Share on other sites More sharing options...
DrV Posted February 22, 2015 Share Posted February 22, 2015 I've never seen this symptom but there is a 4M7 0.5W resistor in each sync circuit which might be to blame (R30 for channels 5 & 6).Having said the above, a few days later and I have on the bench a Betapack 3 with exactly this symptom caused by... R30 open circuit! Spooookyyy... Dave Link to comment Share on other sites More sharing options...
TomHoward Posted February 22, 2015 Share Posted February 22, 2015 We have a betapack3 with channels 3&4 dead that I have been meaning to open for a while. Is R30 labelled on the board or do I need a service manual of some sort?I'm fairly sure its not software set but I'll double check the topset first given the comments above. Link to comment Share on other sites More sharing options...
TomHoward Posted January 5, 2017 Share Posted January 5, 2017 I've still got this on the bench and finally opened this up today - only been there about 4 years. It's only channel 4 that won't light, Ch3 is okay in the end. R29 is good, which is the 4M7 for chs 3&4. I've swapped the microcontroller with the one from ch1&2 but problem stays with 4. Tried the phone no above but late in the day now. Do you have any other suspicions? Link to comment Share on other sites More sharing options...
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