Question about Zenith IQZ60Z97D 60 in. Rear Projection Television

1 Answer

Buckshot again no improvement

I upgraded the stk ic's to 150's I replaced the 1ohm resistors r 4161,r1460,r4162,r4163. r4161 was at 2.4 and the rest were at 1.5 I also checked r 4151 it was at 999ohm so I left it alone. there was no 4160 resistor on the conv board or the schematics I still have the same 3 bowed lines on top from corner to corner and the green bow across the bottom any suggestions .still no picture or menues.

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  • rick werbeski Apr 23, 2007

    the r4151 is supposed to be 1k so I thought 999 ohm is almost perfect. I dug into the smps module and pulled the r3243 which is supposed to be 110k and it weighed in st 1.2 meg and climbing so I will pick one up after my 4 12hour dayshifts and put it in I think this might be it because this resistor cuts power to the whole converegence circuit I think?? I will let you know if it does it and thanks form your input if the high heat (150) stk's won't go I will put the old 110's back in

  • rick werbeski Apr 23, 2007

    Oh ya the r4151 is a 1k smd resistor(soo tiny I would rather not change it if possible)

  • rick werbeski Apr 26, 2007

    the r4151 is fine I changed the r 3243 and the tv came on perfectly .Also the stk 150's that I put in as an upgrade for the stk 110s also are working great I am now finishing the 88 step service menu setup and the convergence and picture are very nice

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The 999 ohm is probably the bad one thats high for a conv ckt. also i would use the amps the tv calls for that upgrade stuff does not always work out like you think it should.

Posted on Apr 23, 2007

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I have red convergance problem.. This is the second time I have replaced all diodes and the stk chips. they dont have any 110 stk chips so i am using 150 stk chips. I replaced all diods and now RK 62...


Alot of techs recommend using the higher wattage ICs to replace the stock ones, which is never a good idea since the resistors get stressed. Upgrading to the STK394-160 IC is the only upgrade Hitachi recommends but then the values of the resistors need to be changed since the stock resistors will not work with the upgraded ICs

Oct 09, 2010 | Hitachi 61HDX98B 61" Rear Projection...

1 Answer

STK392-110 Upgrade to STK392-150


Hi and welcome to FixYa,

Offhand, should be none. The resistor should not be upgraded unlike the STKs. Technically, the ohmage/resistance values should still be the same. If you change to a higher wattage, then, what is improved is the heating capacity, meaning it will be more tolerant to the heat but the resistance value should still be the same.

The STK upgrade is actually more to improved heat handling/transfer capacity of the STK ICs. The technically correct description is high power used in low capacity hence will not heat as much as the originally installed.

Good luck and Thank you for using FixYa. Happy Holidays.

Dec 20, 2008 | Hitachi 50UX57B 50" Rear Projection...

1 Answer

Colors are out of line


When A REAR PROJECTION TV has coloured outlines or a 3D image the Convergence Circuits most likely need attention.

Replacing the output amplifiers (located within the Convergence IC's) allows the pictures to line up correctly, and no more color outlines.

This is the most common fault in all makes of rear projection TVs.

Some models of TV require major disassembly and considerable shop/manufacturer's support to repair because of their design that causes other power supply or vertical deflection problems. The poorly designed products require a "bench" repair that can typically cost from $350 t0 $700.

Some TVs are designed for on-site repair and have more reliable circuit design that does not usually cause damage to other parts of the TV when convergence chips fail. The ones that usually allow reliable on-site repair are JVC, Samsung, Sony and Hitachi.

It is normal to have some resistors in the circuit burn up or increase in value from the heat (from 2.2 ohms to 5 or 10 ohms). These resistors must be replaced with the right value or the chip may fail again.

This is not a simple repair like changing batteries or a fuse. Reading through the other posts shows many that try and end up with bigger problems.

Your JVC uses STK 392-110 IC's. Misinformed people replace the IC's with other "new and improved" IC's, like STK 392-150. These are devices with different characteristics and require different value resistors in the circuit. Replacing with the STK 392-150 will cause overheating of the resistors and a damaged IC.

If you are in Calgary, I can help. If not, get someone that has experience working on your JVC. My website is below with some costs and explanation.

calgaryconvergencerepair.weebly.com/convergence-explanation.html

Good Luck,

Easyab

Jul 11, 2008 | JVC AV-56WP74 56" Rear Projection...

1 Answer

Jvc 65 inch I'art tv


1024x768 Normal 0 When A REAR PROJECTION TV has coloured outlines or a 3D image the Convergence Circuits most likely need attention.

Replacing the output amplifiers (located within the Convergence IC's) allows the pictures to line up correctly, and no more color outlines.

This is the most common fault in all makes of rear projection TVs.

Some models of TV require major disassembly and considerable shop/manufacturer's support to repair because of their design that causes other power supply or vertical deflection problems. The poorly designed products require a "bench" repair that can typically cost from $350 t0 $700.

Some TVs are designed for on-site repair and have more reliable circuit design that does not usually cause damage to other parts of the TV when convergence chips fail. The ones that usually allow reliable on-site repair are JVC, Samsung and Hitachi.

It is normal to have some resistors in the circuit burn up or increase in value from the heat (from 2.2 ohms to 5 or 10 ohms). These resistors must be replaced with the right value or the chip may fail again.

This is not a simple repair like changing batteries or a fuse. Reading through the other posts shows many that try and end up with bigger problems.

Your JVC uses STK 392-110 IC's. Misinformed people replace the IC's with other "new and improved" IC's, like STK 392-150. These are devices with different characteristics and require different value resistors in the circuit. Replacing with the STK 392-150 will cause overheating of the resistors and a damaged IC.

If you are in Calgary, I can help. If not, get someone that has experience working on your JVC. My website is below with some costs and explanation.

calgaryconvergencerepair.weebly.com/convergence-explanation.html

Good Luck,

Easyab

Jul 06, 2008 | JVC AV-56WP74 56" Rear Projection...

1 Answer

Jvc convergence


1024x768 Normal 0 Convergence

When A REAR PROJECTION TV has coloured outlines or a 3D image the Convergence Circuits most likely need attention.

Replacing the output amplifiers (located within the Convergence IC's) allows the pictures to line up correctly, and no more color outlines.

This is the most common fault in all makes of rear projection TVs.

Some models of TV require major disassembly and considerable shop/manufacturer's support to repair because of their design that causes other power supply or vertical deflection problems. The poorly designed products require a "bench" repair that can typically cost from $350 t0 $700.

Some TVs are designed for on-site repair and have more reliable circuit design that does not usually cause damage to other parts of the TV when convergence chips fail. The ones that usually allow reliable on-site repair are JVC, Samsung and Hitachi.

It is normal to have some resistors in the circuit burn up or increase in value from the heat (from 2.2 ohms to 5 or 10 ohms). These resistors must be replaced with the right value or the chip may fail again.

This is not a simple repair like changing batteries or a fuse. Reading through the other posts shows many that try and end up with bigger problems.

Your JVC uses STK 392-110 IC's. Misinformed people replace the IC's with other "new and improved" IC's, like STK 392-150. These are devices with different characteristics and require different value resistors in the circuit. Replacing with the STK 392-150 will cause overheating of the resistors and a damaged IC.

If you are in Calgary, I can help. If not, get someone that has experience working on your JVC. My website is below with some costs and explanation.

calgaryconvergencerepair.weebly.com/convergence-explanation.html

Good Luck,

Easyab

Jun 18, 2008 | JVC AV-56WP74 56" Rear Projection...

1 Answer

JVC Television


1024x768 Normal 0 Convergence


When A REAR PROJECTION TV has coloured outlines or a 3D image the Convergence Circuits most likely need attention.

Replacing the output amplifiers (located within the Convergence IC's) allows the pictures to line up correctly, and no more color outlines.

This is the most common fault in all makes of rear projection TVs.

Some models of TV require major disassembly and considerable shop/manufacturer's support to repair because of their design that causes other power supply or vertical deflection problems. The poorly designed products require a "bench" repair that can typically cost from $350 t0 $700.

Some TVs are designed for on-site repair and have more reliable circuit design that does not usually cause damage to other parts of the TV when convergence chips fail. The ones that usually allow reliable on-site repair are JVC, Samsung and Hitachi.

It is normal to have some resistors in the circuit burn up or increase in value from the heat (from 2.2 ohms to 5 or 10 ohms). These resistors must be replaced with the right value or the chip may fail again.

This is not a simple repair like changing batteries or a fuse. Reading through the other posts shows many that try and end up with bigger problems.

Your JVC uses STK 392-110 IC's. Misinformed people replace the IC's with other "new and improved" IC's, like STK 392-150. These are devices with different characteristics and require different value resistors in the circuit. Replacing with the STK 392-150 will cause overheating of the resistors and a damaged IC.

If you are in Calgary, I can help. If not, get someone that has experience working on your JVC. My website is below with some costs and explanation.

calgaryconvergencerepair.weebly.com/convergence-explanation.html

Good Luck,

Easyab

Jun 05, 2008 | JVC AV-56WP74 56" Rear Projection...

2 Answers

Ic question


No change in resistors is necessary. The -150 can handle more power but will only handle that which is presented. I'm assuming that you are talking about the convergence STKs.
Dan

Mar 19, 2008 | Televison & Video

1 Answer

Tv troubleshoot for me


chances are that IC804 has failed. You have two ICs that allow you to converge the three colors. IC804 is used for Red Horizontal and Vertical Convergence and also for Green Vertical Convergence. IC805 is used for Blue Horizontal and Vertical Convergence and also for Green Horizontal Convergence. These ICs run very hot and have a very high failure rate which sometimes will cause damage to resistors in their associated circuits. They are both STK-110 and it's best to replace them both at the same time. It's also a good idea to upgrade them to either STK-150 or STK-180. These will run a lot cooler than the STK-110.

Before replacement do inspect for any open or overheated resistors as I stated earlier. Being you only have problems with Red Convergence the plus and minus power supplies should be okay since they are common to both ICs.

Try www.tritronicsinc.com. They have the Hitachi CZ00433 (STK392-150) in stock for $20.11 ($32.43 retail). These are Hitachi OEMs. I've had very good results replacing STK392-110s with these chips. Do check for open or overheated resistors before replacing these chips

Dec 29, 2007 | JVC AV-48WP74 48" Rear Projection...

4 Answers

PT-51HX40b BP819


Only use the same part number when replacing convergence amps, or you will need to replace all of the power resistors with recommended values for the convergence amps subsituted.

Dec 08, 2007 | Panasonic PT-51HX40 51" Rear Projection...

1 Answer

Hitachi 65xwx20b convergence


Your message says you "replaced stk392-150", did you replace both of the stk`s or just one of them??? One is for RGB vertical the other is for RGB horizontal, you should always replace both stk`s as a set, Hitachi recommends you use a "replacement kit"
part number X480306", this kit includes both stk`s with a new & supposedly improved set of stk`s as well as all resistors that are required for proper set-up, they strongly recommend you change all of the parts in their kit. The only other thing besides IC`s & resistors that could cause your problem is:
1) bad dcu output (you need a scope to check this)
2) you`ve lost either the +15 volt line or the -15 volt line to the IC`s, "Fxxx" chemical fuse open in power supply.

Dec 01, 2007 | Televison & Video

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