Author Topic: Problem with Samsung HT-DB120  (Read 174 times)

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Offline etetTopic starter

  • Newbie
  • Posts: 2
  • Country: bg
Problem with Samsung HT-DB120
« on: May 01, 2024, 04:39:35 pm »
Hi,
this system has mainboard HT-DB120/THA25.
Display working and also i can switch modes, but there
is no audio.
I noticed that resistor R100 is heating up.
I found wiring in attach, but there is diferences.
1. In this wiring 1st pin of resistor is attached to diode bridge and
second pin is attached to Collector of PQ5. On PCB is not the same.
2. Resistor R100 is labaled as 10ohm, but it is 22ohm. Even colour
code (red, red, black, gold) show 22 ohm.
3. Emitter of PQ5 must go to PIC4 (7812), but this also is not true.
So, it seems that this is not right wiring that i found.
I check also other 5-6 sites, but all is the same.
Can somebody help?
 

Online FIXITNOW2003

  • Contributor
  • Posts: 45
  • Country: gb
Re: Problem with Samsung HT-DB120
« Reply #1 on: May 02, 2024, 06:12:18 am »
these do suffer with bad caps ,have you an ESR meter , C30/31 give various problems
 


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