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Dd20 | Editsuite.com

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Dd20

2 replies [Last post]
Thu, 02/16/2006 - 10:07
GBL
User offline. Last seen 15 years 2 weeks ago. Offline
Joined: 16 Feb 2006

Got a bit of a problem...

Suspect PSU failure, PSU 2, wont fire up, meaning Input Proc card (and some others) wont switch on.

Swapping PSU's around means that the mixer wont power up past the duff PSU, but this means I cant be entirely sure if its the Input Proc card or the Output Proc Card, or the PSU...

Any neat ideas about how to check card?

Anybody got any spare parts for DD20!? Or had a similar experience?

Thanks,

Greg

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Fri, 02/17/2006 - 07:01
#1
GBL
User offline. Last seen 15 years 2 weeks ago. Offline
Joined: 16 Feb 2006
Thanks. Saw above on thompsongrassvalley/support FAQ etc. I just can't believe that there is NO redundancy in the system at all! I'm just debating with myself about wether or not to send the PSU away to Germany or get it done locally. Any idea about lead/return times? TGV dont seem to have much idea, and say it will be there when it gets there etc... Greg
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Fri, 02/17/2006 - 04:12
#2
TechSupportWST
User offline. Last seen 15 years 2 weeks ago. Offline
Joined: 5 Dec 2005
When mains turned ON, the powersupplies of the E-Box do not switch on simultaneous. It will be done in following order: (see E-Box from front) power1 power2 power3 power4 power5 2nd 5th 1st 3rd 4th -5V (VEE) -5V (VEE) 5V (VCC) 5V (VCC) 5V (VEE) Function of the Relaisbord RC1931: The 5 powersupplies are switched on one after the other in the above indicated sequence. The Relaisboard always checks first for proper operation of the power supply just being switched on before the next power-supply would be turned on. for exaple: If powersupply (power4) would be faulty the power5 and power2 does NOT switch on. Porpose for that design: As first the VCC (+5V) must be switched ON for an assemble of boards, then VEE (-5V). Switching ON order: VCC1-->VEE1 VCC2 plus VCC3 -->VEE2. Because the rise time of the voltages is different (caused by the dispersion of the devices inside the powermodules) it is neccessary to force the powersupplies to switch ON in a special order. List of boards which are supplied by the powersupplies: VCC1 / +5V / 1st PS switched ON VEE1 / minus 5 V / 2nd PS switched ON ? all boards ME1 (ME, Key, Wipe) ? Outputprocessor ? Inputprocessor on the left (Input 17...32) VCC2 / +5V / 3rd PS switched ON ? Inputprocessor on the right (Input 1...16) ? all boards ME2 (ME, Key, Wipe) VCC3 / +5V / 4th PS switched ON ? all boards ME3(PP) (ME, Key, Wipe) ? Montage Processor ? Controller RY1917 VEE2 / minus 5V / 5th PS switched ON ? Inputprocessor on the right (Input 1...16) ? all boards ME2 (ME, Key, Wipe) ? all boards ME3(PP) (ME, Key, Wipe) ? Montage Processor ? Controller RY1917 Hope this helps!
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