samsung CRT security monitor wont power on model ssc-12

[shelby5041]

hi

i have an old school black and white samsung crt security monitor that will not power on..its a 4 camera monitor with auto switching built in

it made in 2003

a couple years ago the display was going real dark on it but would power on fine...and now it wont power on at all..no power light ..nothing...dead...

not sure if these are both from same issue...but i would like to repair if possible as its a specific onior that i cant buy anymore and be compatible with my cameas

i dont want tyo install a new system right now...its too much work

i want to fix if possible...

thank you

[shelby5041]

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

and there is no clicking sound or any sounds at all when trying to turn on


on the back is a main power switch in addition to the power switch on front of monitor

the main glass fuse is ok

[petehall347]

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

start with obvious things like power switch .
just a note the last crt sets i fixed had problems with the H.O.T transistor . if i remember rightly they resided near the fly-back transformer .
see if you can find a schematic for it .

[dick_barton]

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

I believe that this is the manual so if you could take some voltage readings.

[shelby5041]

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

thank you

here are some photos..

[shelby5041]

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

more pics.....

[shelby5041]

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

i am novice

[shelby5041]

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

im looking at power schematic and i see the main fuse i see the c101 and i see the sw101 switch they are referring to...i can see them all on my unit...

[petehall347]

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

be careful inside this set as very voltages danger ..

[shelby5041]

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

yes....i know...and im very novice...so not sure i will continue...

i did test the main switch on back and the actual switch does function using my meter..

i have messed with lots of lcd tvs and a few plasma tvs.. over the years and have repaired many...is this crt more dangerous?

[shelby5041]

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

and have worked on the older projection tvs doing convergence repairs...which was a great gig....

[shelby5041]

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

even though the monitor does not power on i am going to check and see if i at least got 12v going to the board for the cameras...

[shelby5041]

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

ok i dont even have 12v going to the camera board....which should have power all the time regardless if monitor display is on or off....

[shelby5041]

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

so this may tell me that its not a monitor power switch issue and is a main power issue..hope someone can heklp me out here

[shelby5041]

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

actually i get 2.5v to the camera board not 0v

and i power monitor on and off from the back power switch and voltage does go to 0 when off and about 2.5v when on ...it should be 12v

[shelby5041]

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

sorry for the responses but im just sitting here looking at the boards and thinking out load....i see 2 caps that are slightly bulged but they are away from the power switch they are in middle of board C501 and C502...right next to the large black cylinder looking part that has a single wire coming out of it going into the crt....i doubt these caps could have anything to do with the monitor not powering on?

[RukyCon]

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

sorry for the responses but im just sitting here looking at the boards and thinking out load....i see 2 caps that are slightly bulged but they are away from the power switch they are in middle of board C501 and C502...right next to the large black cylinder looking part that has a single wire coming out of it going into the crt....i doubt these caps could have anything to do with the monitor not powering on?

It's probably a good idea to replace them as they may cause problems later in life.

The black cylinder part [i think] is the flyback transformer.

[shelby5041]

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

thank you and yes i understand but right now all i want to do is to get the monitor to power on and get power to the camera board...anyhting else im not worried about at this point

[dick_barton]

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

Page 35 of schematic

It's quite possible that TOP224YC has failed however some initial checks can be done

What DC voltage do you have between the two legs of C103
What DC voltage do you have between pins 1 & 2 of PC101 (PCF801)
What DC voltage do you have between pins 3 & 4 of PC101 (PCF801)
What DC voltage do you have between Pin 2 & 3 of U101 (TOP224Y)

With power off test diodes ZD101, ZD102, D101, D102, D104 using meter in diode mode.

Finally I would remove and measure and if necessary replace C106, C114 & C117

[shelby5041]

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

thanks a lot mr barton

i will check when i get some time....im very anxious to see if i can this this sytem working again since right now i have no security/video protection at my home.

does c501 or c502 have anything to do with my issue or can i rule them out 100%....as far as the power issue....also do you know what c501 and c502 purpose are?

like i said originally the monitor/system worked great ...for over 12 years it was on 24/7.....i didnt have the display on though..i would only turn that on once in a while ..so not sure why the display went real real dark a couple years ago and then now the system seems to not power on at all...

i believe the front power switch is for turning on display only...with the front switch off...the system still was actually on and the front led lights would be on and switch from camera 1 to cam 2 to camera 3 to cam 4..since this was a switching cam system...and i could have valume up and hear sounds from each cam as they switched......all of this worked with front power switch off if i recall...