electrohobby said: The convergence on my PTH5492 went bad. When I enter 56 point convergence, red lines can't be moved, blue lines are only visible on the center 1/3 of the screen and fade out outside of this towards the edges, Only the vertical green lines can be moved. After reading this thread I opened up the set and checked the picofuses under the heatsinks. One is blown. I have ordered 2 STK392-040 from www.pacificsemi.com which have arrived. The parts don't have sanyo written on them though the website says they carry only original sanyo parts. Should I replace just the one on which the picofuse is blown or both? Is there anything that needs to be replaced? I am wondering why the blue lines are not spanning the complete screen.
Thanks to the information on this website. I have fixed my TV. I replaced one picofuse and one STK392-040 for Red and Green convergence on which the fuse was blown. The picture looks as good as before now even though the issue on blue is still there.
You may be right. I guess time will tell if that's true as I have already closed the set:) I have read threads where people have had success by just changing the fuse. A couple of days after the fix I moved some lines on the 56 point convergence chart so that a larger correction was needed from the uncorrected line pattern. The TV started resetting intermittently and just before it would reset, the Red and Green convergence will go off. I re-adjusted the lines to reduce the offset from the uncorrected lines and I haven't seen the resetting issue since. I am keeping my fingers crossed.
I am able to adjust all RGB horizontal & vertical lines on the 56 point convergence. This means all the 6 correction amps (there are 3 in each STK392-040) are working.
I believe that the problem that I am seeing with blue is unrelated to the convergence chip. It seems like an issue related to blue CRT's focus adjustment. I don't know how to fix it but the picture looks fine even with the issue being there.
Hey gang, I just picked up this tv for 20.00 bucks, I used to be an Aircraft Mechanic and have a car with the engine out in the garage. I can solder and all that but frankly would rather not. Can someone give me the part number for the boards so that I can order them. The owner said it was working fine then just stopped. I have this part number and it looks like the right board but it's for a samsung AA9501846D.
Or at least tell me where on the boards to look for the part number.
The best advice I can tell you at this point is to go to tvrepairkits.com and order the complete convergence kit for your model of TV set, no need to search and order multiple parts from different sources and pay multiple shipping fees! The kit comes with original Sanyo STK ICÂ’S , not those cheap aftermarket or china made ICÂ’S full pictorial directions, the thermal paste, resistors, the correct Pico fuses, AND free live on-Line tech assistance in case you run into a problem with the repair. They ship out 2 to 3 day Priority mail, the next day in most cases GOOD LUCK!!!
Larry Dillon. http://www.fixya.com/support/r3342653-convergence_fix
So far I haven't had any issues besides occasional reset and the fuzzy blue lines. TV picture looks normal. If it fails again I will order the kit from tvrepairkits.com.
even though i still have my pth5498, i'm a little surprised to still see this tv set discussed and responded to - a credit to this site.
been 2 years since i replaced my entire convergence board. fixed my red-gun problem and not a hitch since. kind a wish it would break so i could buy a new one.
electrohobby said:
You may be right. I guess time will tell if that's true as I have already closed the set:) I have read threads where people have had success by just changing the fuse. A couple of days after the fix I moved some lines on the 56 point convergence chart so that a larger correction was needed from the uncorrected line pattern. The TV started resetting intermittently and just before it would reset, the Red and Green convergence will go off. I re-adjusted the lines to reduce the offset from the uncorrected lines and I haven't seen the resetting issue since. I am keeping my fingers crossed.
I am able to adjust all RGB horizontal & vertical lines on the 56 point convergence. This means all the 6 correction amps (there are 3 in each STK392-040) are working.
I believe that the problem that I am seeing with blue is unrelated to the convergence chip. It seems like an issue related to blue CRT's focus adjustment. I don't know how to fix it but the picture looks fine even with the issue being there.
The convergence went bad again. I replaced the other fuse and the other IC. It started working again with the back cover off. When I put the back cover on it I was seeing the convergence problem occasionally but it would be fine if I shutdown the TV and let it cool down a bit. Then after a few days fuses blew on both the convergence ICs. I replaced the fuses and the set works fine when I leave it open and put a big fan behind it to suck the hot air out. I ordered a 120 mm 12V fan ($3.55 on Ebay) and have installed it on the heatsinks of the STK ICs. I first powered the fan from an external power supply but have now connected it to 13.5V supply rail inside the TV. The ICs are not heating up much, they are barely warm to touch. TV is working fine. Installing a fan was the cheapest option compared to replacing the whole sub convergence board or replacing the ICs again with original Sanyo parts. And I am not sure if the original Sanyo parts will work fine as well since these ICs may be overheating due to problems with how they are being driven by other parts of the circuit. Installing the fan or replacing the whole board seemed like better options to me.
The best advice I can tell you at this point is to go to tvrepairkits.com and order the complete convergence kit for your model of TV set, no need to search and order multiple parts from different sources and pay multiple shipping fees! The kit comes with original Sanyo STK ICÂ’S , not those cheap aftermarket or china made ICÂ’S full pictorial directions, the thermal paste, resistors, the correct Pico fuses, AND free live on-Line tech assistance in case you run into a problem with the repair. They ship out 2 to 3 day Priority mail, the next day in most cases,and yes, adding an internal fan to cool off the heat sink with the ic's attached to it. Larry
Dillon
Thanks. Even though I haven't changed the ICs and only installed the fan. The TV has been working perfectly over the last week. tvrepairkits.com don't seem to have the kit for PTH5498. Should I still change the ICs?
Also, it seems the problem with the blue convergence lines shown in my profile picture may be because of contaminated coolant. I opened up the blue CRT and the coolant was very dirty. I have to buy the coolant now.
I can get into convergence, I can move green and blue side to side and up n down but when I try to move the red it goes up fine but not left to right...any suggestions, I know this is an old forum.
This means that you need to change one of the STK392-040 ICs. I believe it is the one closer to the back cover of the TV. I would also recommend that you mount a 120mm fan on the heatsinks to keep the ICs cool. I am running the 12V fan with the 13.5V supply line in the TV.
Is there a designated spot to plug a plug n play fan in?
I was able to line everything up to the red and it seems really good now, but it still means that one of the STK392-040 ICs is bad?
Inst_Pudding,
Please check the fuse again. Do not just pop the cap off and visually inspect it. Even if the filament appears to be intact, it's probably not. Like ctf1800 said, it's the fuse.
You need to test the fuse for continuity.
The problem that you explained is due to the blown fuse. There are no convergence IC's in this set. I'm am 99.9% certain your fuse has blown.
Get the fuse here: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=220478092023
After you install the fuse, you MUST resolder the points at the flyback transformer which is located next to the fuse (red wires leading to it). Cracked & cold solder usually develops and will cause FL231 to fail again if you skip this step.
SamsungHelpNeeded said:
or is it a blown fuse like this guy says?
Inst_Pudding,
Please check the fuse again. Do not just pop the cap off and visually inspect it. Even if the filament appears to be intact, it's probably not. Like ctf1800 said, it's the fuse.
You need to test the fuse for continuity.
The problem that you explained is due to the blown fuse. There are no convergence IC's in this set. I'm am 99.9% certain your fuse has blown.
Get the fuse here: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=220478092023
After you install the fuse, you MUST resolder the points at the flyback transformer which is located next to the fuse (red wires leading to it). Cracked & cold solder usually develops and will cause FL231 to fail again if you skip this step.
Are all your lines straight and distributed like the convergence pattern shown in the service manual for this set (Samsung PCL-HCL-ST Models)? If not, your picture would be distorted.
I don't think your fuse is blown but it may blow eventually if one of your ICs is malfunctioning. Each convergence IC has one picofuse that looks like this . Each convergence IC has three amplifiers for vertical and horizontal controls of R, G and B. If the fuse was blown on an IC 3 amplifiers wouldn't work. So, it may be like vertical and horizontal of red and Vertical of Green wouldn't work.
There is no standard connector to attach a fan in the TV. If you look at the service manual there is 13.5V supply coming from the power supply board to the sub-deflection board and then going to the tuner board through connectors. I soldered the fan wires to 13.5 V and Ground points on the connector going from sub-deflection board to the tuner board.
I soldered the fan wires to connector CN801 (see page 175 of Samsung PCL-HCL-ST Models) and mounted the fan on the heatsink. I had to drill a hole through the heatsink to mount the fan. This is the fan I got. It is also OK to use an external power adapter for the fan but then the fan doesn't switch on or off automatically with the TV. I desoldered the 4 LEDs that came installed on the Fan as they were lighting up the inside of the TV and some light was showing through the TV screen.
I don't know where you can get the service manual. Your best bet seems to be to replace the entire convergence board. Luckily its not very expensive ($53 only) . See http://www.encompassparts.com/products/?BP95-00400C
I got a service manual for this tv now and know what all the buttons on the remote do now.
What is the Almighty-Cg, Module theres a button sequence to enter for that data to be input? in Cg-Mode..
Also...
I have moved my convergence screen all the way left by accident and there inst a button listed for moving it right...any ideas.
Sorry to clarify... it is the Convergence Pattern that I moved left. it states that i can adjust the H-POS value in the Convergence Factory Mode. is that the mute 1-8-2? and what value because i cannot find H-POS
mute 1 8 2 power on should get you into the service menu. There you can adjust HShift to shift the picture horizontally. But I don't think you should mess with those values. First try to move the convergence pattern to the right in the factory convergence mode.
Electrohobby,The best advice I can tell you at this point is to go to tvrepairkits.com and order the complete convergence kit for your model of TV set, no need to search and order multiple parts from different sources and pay multiple shipping fees! The kit comes with original Sanyo STK ICÂ’S , not those cheap aftermarket or china made ICÂ’S full pictorial directions, the thermal paste, resistors, the correct Pico fuses, AND free live on-Line tech assistance in case you run into a problem with the repair. They ship out 2 to 3 day Priority mail, the next day in most cases,
Larry Dillon.
electrohobby
I dont think this is what I need to adjust, I tried that but it is the Convergence Pattern that needs to move back right to align the screen center.
The button i pushed moved everything left...newer models have a designated button listed to move the Pattern Right but not stated anywhere in me service manual.
SamsungHelpNeeded said: electrohobby I dont think this is what I need to adjust, I tried that but it is the Convergence Pattern that needs to move back right to align the screen center. The button i pushed moved everything left...newer models have a designated button listed to move the Pattern Right but not stated anywhere in me service manual.
I didn't see any buttons in the my TVs service manual to move the whole convergence pattern. It only allows you move a line at a time by pressing 4 and then using the left or right arrow keys.Can you point me to the service manual? May be if you keep moving it to the left it will circle back?
Larry Dillon said: Electrohobby,The best advice I can tell you at this point is to go to tvrepairkits.com and order the complete convergence kit for your model of TV set, no need to search and order multiple parts from different sources and pay multiple shipping fees! The kit comes with original Sanyo STK IC'S , not those cheap aftermarket or china made IC'S full pictorial directions, the thermal paste, resistors, the correct Pico fuses, AND free live on-Line tech assistance in case you run into a problem with the repair. They ship out 2 to 3 day Priority mail, the next day in most cases, Larry Dillon.
Thanks. I sent an email and heard back from tvrepairkits.com a couple of days ago. They said I am on the right track with changing the CRT fluid and installing the fan. If the ICs stop working again I will buy it from them.
electrohobby: I didn't see any buttons in the my TVs service manual to move the whole convergence pattern. It only allows you move a line at a time by pressing 4 and then using the left or right arrow keys.Can you point me to the service manual? May be if you keep moving it to the left it will circle back?
I try pushing further left but wont cycle back...
Right out of my service manual
17. CONVERGENCE ADJUSTMENT PATTERN MOVE KEY
Move the whole Convergence Adjustment Pattern to the left (MTS Button) or adjust the H-POS value in
Convergence Factory Mode.
(Before beginning Convergence Adjustment, precisely match the center of the TV screen with the center
of the Convergence screen.)
electrohobby said: Thanks. Even though I haven't changed the ICs and only installed the fan. The TV has been working perfectly over the last week. tvrepairkits.com don't seem to have the kit for PTH5498. Should I still change the ICs? Also, it seems the problem with the blue convergence lines shown in my profile picture may be because of contaminated coolant. I opened up the blue CRT and the coolant was very dirty. I have to buy the coolant now. tvrepairkits.com seems a quite expensive ( See http://www.tv-forums.com/forum/TV_Equipment_C4/TV_Repair_Forum_F3/Where_can_I... ) as they are charging $70 for a coolant that is $9 elsewhere.
After changing the coolant of the blue CRT the TVs image quality is now as good as new :)
whats the secret to moving the pattern to the right????
17. CONVERGENCE ADJUSTMENT PATTERN MOVE KEY
Move the whole Convergence Adjustment Pattern to the left (MTS Button) or adjust the H-POS value in
Convergence Factory Mode.
(Before beginning Convergence Adjustment, precisely match the center of the TV screen with the center
of the Convergence screen.)
Thanks to the information on this website. I have fixed my TV. I replaced one picofuse and one STK392-040 for Red and Green convergence on which the fuse was blown. The picture looks as good as before now even though the issue on blue is still there.
you should have replaced both convergence ic's at once as they always go bad in a pair!!!!!!!
Larry D
You may be right. I guess time will tell if that's true as I have already closed the set:) I have read threads where people have had success by just changing the fuse. A couple of days after the fix I moved some lines on the 56 point convergence chart so that a larger correction was needed from the uncorrected line pattern. The TV started resetting intermittently and just before it would reset, the Red and Green convergence will go off. I re-adjusted the lines to reduce the offset from the uncorrected lines and I haven't seen the resetting issue since. I am keeping my fingers crossed.
I am able to adjust all RGB horizontal & vertical lines on the 56 point convergence. This means all the 6 correction amps (there are 3 in each STK392-040) are working.
I believe that the problem that I am seeing with blue is unrelated to the convergence chip. It seems like an issue related to blue CRT's focus adjustment. I don't know how to fix it but the picture looks fine even with the issue being there.
Hey gang, I just picked up this tv for 20.00 bucks, I used to be an Aircraft Mechanic and have a car with the engine out in the garage. I can solder and all that but frankly would rather not. Can someone give me the part number for the boards so that I can order them. The owner said it was working fine then just stopped. I have this part number and it looks like the right board but it's for a samsung AA9501846D.
Or at least tell me where on the boards to look for the part number.
Thanks everyone..
The best advice I can tell you at this point is to go to tvrepairkits.com and order the complete convergence kit for your model of TV set, no need to search and order multiple parts from different sources and pay multiple shipping fees! The kit comes with original Sanyo STK ICÂ’S , not those cheap aftermarket or china made ICÂ’S full pictorial directions, the thermal paste, resistors, the correct Pico fuses, AND free live on-Line tech assistance in case you run into a problem with the repair. They ship out 2 to 3 day Priority mail, the next day in most cases GOOD LUCK!!!
Larry Dillon.
http://www.fixya.com/support/r3342653-convergence_fix
Thanks!
So far I haven't had any issues besides occasional reset and the fuzzy blue lines. TV picture looks normal. If it fails again I will order the kit from tvrepairkits.com.
even though i still have my pth5498, i'm a little surprised to still see this tv set discussed and responded to - a credit to this site.
been 2 years since i replaced my entire convergence board. fixed my red-gun problem and not a hitch since. kind a wish it would break so i could buy a new one.
The convergence went bad again. I replaced the other fuse and the other IC. It started working again with the back cover off. When I put the back cover on it I was seeing the convergence problem occasionally but it would be fine if I shutdown the TV and let it cool down a bit. Then after a few days fuses blew on both the convergence ICs. I replaced the fuses and the set works fine when I leave it open and put a big fan behind it to suck the hot air out. I ordered a 120 mm 12V fan ($3.55 on Ebay) and have installed it on the heatsinks of the STK ICs. I first powered the fan from an external power supply but have now connected it to 13.5V supply rail inside the TV. The ICs are not heating up much, they are barely warm to touch. TV is working fine. Installing a fan was the cheapest option compared to replacing the whole sub convergence board or replacing the ICs again with original Sanyo parts. And I am not sure if the original Sanyo parts will work fine as well since these ICs may be overheating due to problems with how they are being driven by other parts of the circuit. Installing the fan or replacing the whole board seemed like better options to me.
The best advice I can tell you at this point is to go to tvrepairkits.com and order the complete convergence kit for your model of TV set, no need to search and order multiple parts from different sources and pay multiple shipping fees! The kit comes with original Sanyo STK ICÂ’S , not those cheap aftermarket or china made ICÂ’S full pictorial directions, the thermal paste, resistors, the correct Pico fuses, AND free live on-Line tech assistance in case you run into a problem with the repair. They ship out 2 to 3 day Priority mail, the next day in most cases,and yes, adding an internal fan to cool off the heat sink with the ic's attached to it. Larry
Dillon
Thanks. Even though I haven't changed the ICs and only installed the fan. The TV has been working perfectly over the last week. tvrepairkits.com don't seem to have the kit for PTH5498. Should I still change the ICs?
Also, it seems the problem with the blue convergence lines shown in my profile picture may be because of contaminated coolant. I opened up the blue CRT and the coolant was very dirty. I have to buy the coolant now.
tvrepairkits.com seems a quite expensive ( See http://www.tv-forums.com/forum/TV_Equipment_C4/TV_Repair_Forum_F3/Where_... ) as they are charging $70 for a coolant that is $9 elsewhere.
I can get into convergence, I can move green and blue side to side and up n down but when I try to move the red it goes up fine but not left to right...any suggestions, I know this is an old forum.
This means that you need to change one of the STK392-040 ICs. I believe it is the one closer to the back cover of the TV. I would also recommend that you mount a 120mm fan on the heatsinks to keep the ICs cool. I am running the 12V fan with the 13.5V supply line in the TV.
Is there a designated spot to plug a plug n play fan in?
I was able to line everything up to the red and it seems really good now, but it still means that one of the STK392-040 ICs is bad?
or is it a blown fuse like this guy says?
Inst_Pudding,
Please check the fuse again. Do not just pop the cap off and visually inspect it. Even if the filament appears to be intact, it's probably not. Like ctf1800 said, it's the fuse.
You need to test the fuse for continuity.
The problem that you explained is due to the blown fuse. There are no convergence IC's in this set. I'm am 99.9% certain your fuse has blown.
Get the fuse here: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=220478092023
After you install the fuse, you MUST resolder the points at the flyback transformer which is located next to the fuse (red wires leading to it). Cracked & cold solder usually develops and will cause FL231 to fail again if you skip this step.
Are all your lines straight and distributed like the convergence pattern shown in the service manual for this set (Samsung PCL-HCL-ST Models)? If not, your picture would be distorted.
I don't think your fuse is blown but it may blow eventually if one of your ICs is malfunctioning. Each convergence IC has one picofuse that looks like this . Each convergence IC has three amplifiers for vertical and horizontal controls of R, G and B. If the fuse was blown on an IC 3 amplifiers wouldn't work. So, it may be like vertical and horizontal of red and Vertical of Green wouldn't work.
There is no standard connector to attach a fan in the TV. If you look at the service manual there is 13.5V supply coming from the power supply board to the sub-deflection board and then going to the tuner board through connectors. I soldered the fan wires to 13.5 V and Ground points on the connector going from sub-deflection board to the tuner board.
I am assuming that your TV is PTH5498. Right?
I soldered the fan wires to connector CN801 (see page 175 of Samsung PCL-HCL-ST Models) and mounted the fan on the heatsink. I had to drill a hole through the heatsink to mount the fan. This is the fan I got. It is also OK to use an external power adapter for the fan but then the fan doesn't switch on or off automatically with the TV. I desoldered the 4 LEDs that came installed on the Fan as they were lighting up the inside of the TV and some light was showing through the TV screen.
HC-P4363W is the model of samsung tv...I forgot to mention that, do you know where the service manual for that can be found?
See this thread below Convergance problem with a Samsung Rear Projection
I don't know where you can get the service manual. Your best bet seems to be to replace the entire convergence board. Luckily its not very expensive ($53 only) . See http://www.encompassparts.com/products/?BP95-00400C
I got a service manual for this tv now and know what all the buttons on the remote do now.
What is the Almighty-Cg, Module theres a button sequence to enter for that data to be input? in Cg-Mode..
Also...
I have moved my convergence screen all the way left by accident and there inst a button listed for moving it right...any ideas.
Also...
I have moved my convergence screen all the way left by accident and there inst a button listed for moving it right...any ideas.
Sorry to clarify... it is the Convergence Pattern that I moved left. it states that i can adjust the H-POS value in the Convergence Factory Mode. is that the mute 1-8-2? and what value because i cannot find H-POS
mute 1 8 2 power on should get you into the service menu. There you can adjust HShift to shift the picture horizontally. But I don't think you should mess with those values. First try to move the convergence pattern to the right in the factory convergence mode.
Electrohobby,The best advice I can tell you at this point is to go to tvrepairkits.com and order the complete convergence kit for your model of TV set, no need to search and order multiple parts from different sources and pay multiple shipping fees! The kit comes with original Sanyo STK ICÂ’S , not those cheap aftermarket or china made ICÂ’S full pictorial directions, the thermal paste, resistors, the correct Pico fuses, AND free live on-Line tech assistance in case you run into a problem with the repair. They ship out 2 to 3 day Priority mail, the next day in most cases,
Larry Dillon.
electrohobby
I dont think this is what I need to adjust, I tried that but it is the Convergence Pattern that needs to move back right to align the screen center.
The button i pushed moved everything left...newer models have a designated button listed to move the Pattern Right but not stated anywhere in me service manual.
I didn't see any buttons in the my TVs service manual to move the whole convergence pattern. It only allows you move a line at a time by pressing 4 and then using the left or right arrow keys.Can you point me to the service manual? May be if you keep moving it to the left it will circle back?
Thanks. I sent an email and heard back from tvrepairkits.com a couple of days ago. They said I am on the right track with changing the CRT fluid and installing the fan. If the ICs stop working again I will buy it from them.
electrohobby: I didn't see any buttons in the my TVs service manual to move the whole convergence pattern. It only allows you move a line at a time by pressing 4 and then using the left or right arrow keys.Can you point me to the service manual? May be if you keep moving it to the left it will circle back?
I try pushing further left but wont cycle back...
Right out of my service manual
17. CONVERGENCE ADJUSTMENT PATTERN MOVE KEY
Move the whole Convergence Adjustment Pattern to the left (MTS Button) or adjust the H-POS value in
Convergence Factory Mode.
(Before beginning Convergence Adjustment, precisely match the center of the TV screen with the center
of the Convergence screen.)
After changing the coolant of the blue CRT the TVs image quality is now as good as new :)
whats the secret to moving the pattern to the right????
17. CONVERGENCE ADJUSTMENT PATTERN MOVE KEY
Move the whole Convergence Adjustment Pattern to the left (MTS Button) or adjust the H-POS value in
Convergence Factory Mode.
(Before beginning Convergence Adjustment, precisely match the center of the TV screen with the center
of the Convergence screen.)
I bet the ic's have an intermittent condition and yes they probably will go bad and when they do could take out several resistors
Larry Dillon.
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