samsung CRT security monitor wont power on model ssc-12

[vinceroger69]

Re: samsung CRT security monitor wont power on model ssc-12

have you tried heating the standby area of the board up? i wonder if its got a bad start up capacitor

[dick_barton]

Re: samsung CRT security monitor wont power on model ssc-12

That is the opto-isolator and as far as I can work out is the only one on the power supply. If you can measure what voltages you have between the pins mentioned earlier.

[shelby5041]

Re: samsung CRT security monitor wont power on model ssc-12

i am novice vinveroni....and dont have all the ability or equipment you guys have..i have basics and know very very basics....but i have repaired with peoples help such as yours in the past

[shelby5041]

Re: samsung CRT security monitor wont power on model ssc-12

on pt101 which pins are 1234 and i test with power on i assume and what do i need to worry about not doing as far as safety

[shelby5041]

Re: samsung CRT security monitor wont power on model ssc-12

i am charging my dig cam battery so maybe later i will be ablwe to post some slighly better photos....

[shelby5041]

Re: samsung CRT security monitor wont power on model ssc-12

i would like to know the purpose of c501 and c502 since both are bulged......

i found the c501 on the micom page of schematics

have no clue what micom is

[dick_barton]

Re: samsung CRT security monitor wont power on model ssc-12

If they are bulged then they definitely need to be replaced. Unfortunately the schematic doesn't show C502 but C501 is connected to the 5V supply so would have a major affect on the running of the set. 5V is used for all the logic IC's

I would change them and then see if it does the job before doing anything else. While you have the board away from the set to remove the faulty capacitors make sure no other capacitors are showing signs of stress. It would be a good time to change any.

[shelby5041]

Re: samsung CRT security monitor wont power on model ssc-12

those are the only 2 that show bulged.....and i do see a lot of reference to 5v attached to the c501 on the schematic micom page

do you think its a small possibility these 2 caps are the issue?

and why no c502 on schematics?

c502 on my board is a 470uf 35v cap and c501 is 47uf 16v

[shelby5041]

Re: samsung CRT security monitor wont power on model ssc-12

i should be able to change without removing the board....there is a steel plate underneath i can remove to get to bottm of bord to desolder...

i dont want to remove the board sine the crt is in the way and i cant get to the screws unless i remove the crt..which i dont want to do

[dick_barton]

Re: samsung CRT security monitor wont power on model ssc-12

those are the only 2 that show bulged.....and i do see a lot of reference to 5v attached to the c501 on the schematic micom page

do you think its a small possibility these 2 caps are the issue?

and why no c502 on schematics?

c502 on my board is a 470uf 35v cap and c501 is 47uf 16v

C502 is probably on the 15V supply

[shelby5041]

Re: samsung CRT security monitor wont power on model ssc-12

i took some more pics but it just doesnt work..too many things in way crt wires etc...

[shelby5041]

Re: samsung CRT security monitor wont power on model ssc-12

mr buton

i changed out the 2 suspect caps c501 and c502(my esr meter is at work so i couldnt actually test them so i just changed them like you recommended)

unfortunately ..no change

still only get 2.5v to the camera board instead of 12v

[shelby5041]

Re: samsung CRT security monitor wont power on model ssc-12

correction..barton

[shelby5041]

Re: samsung CRT security monitor wont power on model ssc-12

hi barton and vinceroni and others

i would like to attempt to repair this monitor with your help if possible

i did change the 2 caps and no change..i still only get 2.5v going to camera board and should be 12v

what component could be causing the low voltage? and no power up at all...dead..
and since i can not locate the same monitor or board anywhere online i need to repair

thank you

[vinceroger69]

Re: samsung CRT security monitor wont power on model ssc-12

start by changing all the capacitors on the standby/power suppy area thats always a good starting point

[shelby5041]

Re: samsung CRT security monitor wont power on model ssc-12

not sure which caps to look for....for whatever reason the schematics do not match my board as far as components...

[shelby5041]

Re: samsung CRT security monitor wont power on model ssc-12

just messing around here...

i have a power supply that i can try to connect leads to and try to connect to the 12v connectors going to the camera board..shouldnt this power on the board and hence the front camera lights indicators on the front of monitor turn on?..

also on my universale power supply adapter that has 5 diff v settings..when i put it on 12v i test it at 19v and when i put it on 9v it tests at like 14v..why such a diff?..if i go to 7v it tests at just over 12v so i guess i would use that to go to the 12v input to test the camera board?

[dick_barton]

Re: samsung CRT security monitor wont power on model ssc-12

just messing around here...

i have a power supply that i can try to connect leads to and try to connect to the 12v connectors going to the camera board..shouldnt this power on the board and hence the front camera lights indicators on the front of monitor turn on?..

also on my universale power supply adapter that has 5 diff v settings..when i put it on 12v i test it at 19v and when i put it on 9v it tests at like 14v..why such a diff?..if i go to 7v it tests at just over 12v so i guess i would use that to go to the 12v input to test the camera board?

Remove the fuse so that you cannot accidentally power up the TV via the mains.
The set itself is rated at 34 Watts so a regulated supply of 12V x 3Amp should be capable of running it although I suspect 12V x 4 Amps or more if the camera's also have their power supplied by the TV.

The readings you are getting from the power supply is because it's an unregulated power supply which I would not use in this case. There are cheap laptop power supplies with regulated 12V supplies available everywhere.

[shelby5041]

Re: samsung CRT security monitor wont power on model ssc-12

ok when i hook up an external 12v power source to the 12v camera board input the lights on the front of the monitor for cameras do turn on and seem to function

[shelby5041]

Re: samsung CRT security monitor wont power on model ssc-12

i used the 7v setting which put out 12.2 volts tested....