| Author |
Message |
| VTSS |
 Posted: Tue Mar 24, 2009 4:41 am Post subject: |
|
| After a few minutes of studying the service manual I noticed the "System Control" outputs/inputs. System control 3 has both a + and - 12v output. The fans came wired in parallel, and nearly burned up when I connected them to the 12v source. After re wiring the fans in series I was able to make it all work. Thanks to everyone that helped. |
|
 |
| Guest |
| Posted: Tue Mar 24, 2009 1:50 am Post subject: |
|
| jts1957 wrote: | I assume they run with no problem on a 5 volt external supply.
Must be too much of a load when hooked to the standby supply.
Could try off one of the 9 volt or higher supplies, maybe with a three-terminal 5 volt regulator IC? |
I tried running it off one of the 9v supplies. Amp powered up no problem, but as soon as I turned the fan on the display lights shut off but the unit stayed on. After turning the fan off, the lights come back on but are all messed up (some lit up that werent before, some blinking) |
|
|
| livewire |
| Posted: Mon Mar 23, 2009 8:43 am Post subject: Electronics General |
|
| The download manual is self sufficient usually for all well defined brands.Have to go through it pretty thoroughly and is sure to get what is needed to fix up the system. |
|
|
| jts1957 |
| Posted: Mon Mar 23, 2009 5:33 am Post subject: |
|
I assume they run with no problem on a 5 volt external supply.
Must be too much of a load when hooked to the standby supply.
Could try off one of the 9 volt or higher supplies, maybe with a three-terminal 5 volt regulator IC? |
|
|
| VTSS |
| Posted: Mon Mar 23, 2009 5:23 am Post subject: |
|
| It is one fan housing with two 80mm fans in it, each drawing .21A |
|
|
| jts1957 |
| Posted: Mon Mar 23, 2009 4:54 am Post subject: |
|
How big is this 5 volt fan? How much current does it draw?
5.6 volt is stand-by source - 2SD1387 should handle up to 2 amps if I read the datasheet correctly. |
|
|
| VTSS |
| Posted: Mon Mar 23, 2009 4:36 am Post subject: |
|
| Got the fan wired to a switch. The fan powers up no problem when the amp is off. However, when I turn the amp on and then flip the switch for the fan, the amp shuts down. |
|
|
| Guest |
| Posted: Mon Mar 23, 2009 4:24 am Post subject: |
|
| Got it, thanks everyone |
|
|
| Guest |
| Posted: Mon Mar 23, 2009 4:20 am Post subject: |
|
| Wired fan to Q804, unit would not power on. I tested Q804 with a multimeter, it shows 5v when the amp is off. The fan needs 5v DC, any DC points anywhere? |
|
|
| jts1957 |
| Posted: Sun Mar 22, 2009 4:16 pm Post subject: |
|
| Both points reference chassis ground. |
|
|