| View previous topic :: View next topic |
| Author |
Message |
Guest
|
 Posted: Mon Mar 16, 2009 8:59 pm Post subject: samsung 793df |
 |
|
| Monitor is samsung 793df. Is it dead, no LED light, no stand by, can't switch on. Fuse is OK and nothing burned in power supply (I think). |
|
| Back to top |
|
 |
jts1957
Joined: 24 Nov 2008
Posts: 2476
Location: Far, Far Away
|
| Posted: Tue Mar 17, 2009 12:19 am Post subject: |
|
|
Have you checked voltages at power supply connectors that go to other boards? Should have (at least) a 5 volt and 12 - 24 volt supply.
No "bulging" tops on electrolytics in power supply? |
|
| Back to top |
|
|
Guest
|
| Posted: Tue Mar 17, 2009 4:01 pm Post subject: |
|
|
| No voltage. Capacitors are OK. Replaced DP704 and nothing. |
|
| Back to top |
|
|
jts1957
Joined: 24 Nov 2008
Posts: 2476
Location: Far, Far Away
|
| Posted: Tue Mar 17, 2009 6:18 pm Post subject: |
|
|
| Do you have AC to bridge rectifier? |
|
| Back to top |
|
|
Guest
|
| Posted: Tue Mar 17, 2009 11:47 pm Post subject: |
|
|
| Yes. |
|
| Back to top |
|
|
jts1957
Joined: 24 Nov 2008
Posts: 2476
Location: Far, Far Away
|
| Posted: Wed Mar 18, 2009 3:19 am Post subject: |
|
|
Do you have raw B-Plus at bridge rectifier?
I don't have schematic. What is function of DP704? |
|
| Back to top |
|
|
Justmanuals
Joined: 21 Aug 2004
Posts: 1948
|
|
| Back to top |
|
|
Guest
|
| Posted: Wed Mar 18, 2009 2:38 pm Post subject: |
|
|
| There is voltage on the big electrolytic.[/u] |
|
| Back to top |
|
|
jts1957
Joined: 24 Nov 2008
Posts: 2476
Location: Far, Far Away
|
| Posted: Wed Mar 18, 2009 8:08 pm Post subject: |
|
|
Is raw B-Plus at regulator?
How is "stand by" source derived in this unit? |
|
| Back to top |
|
|
Guest
|
| Posted: Sun Mar 22, 2009 11:52 pm Post subject: |
|
|
| There is raw B-Plus. I think transformer is dead. |
|
| Back to top |
|
|
|
|
|
FAQ
