Question about Toshiba 43H70 43" Rear Projection Television

2 Answers

Replacing the 2 stk392-110 on toshibe tn43v71 need resistor watts

I am replacing the six 2.2 ohm resistors r7725,r7728,r7735,r7710,r7720,r7715 and the six 68 ohm resistors r7711,r7721,r7716,r7726,r7731,r7736 on the toshibe tn43v71 while I am replacing the two stk 392-110 convergence ic's Need to know what are the wattages of these resistors please?
I am doing all of this because I have no picture and all I have is a blinking red power light buton. I was reading there might be a blown pico or glass fuse. I can not locate these fuses by the heat sinks of the convergence ic does anyone know whre these are also
Thanks again for any assistance

Posted by on

  • mrzalex Sep 14, 2009

    I still do not know what the wattage of these resistors are? And I do not know the placement of the possible blown fuse

×

Ad

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 585 Answers

Hi my name is Eric,
I hope I can help you with your issue ,
 They are 1 watt resistors all of them, 2 watt is also fine but do not use less than 1 watt.
 
 
If you feel good about my solution please click accept.

I will reply asap
Thanks
Eric

I’m happy to help further over the phone at https://www.6ya.com/expert/eric_ab7c09ec01841771

Posted on Sep 14, 2009

Ad
  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 1,723 Answers

The higher the wattage rating of the resistor the larger is the physical size. Resistors that dissipate very large amounts of power (watts) are usually wirewound resistors. Wirewound resistors with wattage ratings up to 50 watts are not uncommon. Figure 1-30 shows some resistors which have different wattage ratings. Notice the relative sizes of the resistors. If they are tiny,they are low wattage...1/8th watt.

replacing the 2 stk392-110 on toshibe tn43v71 need - 51b8376.gif


If you need further help, I’m available over the phone at https://www.6ya.com/expert/craig_3fa289bf857b1a3c

Posted on Sep 13, 2009

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Looking for resistor value on Toshiba PB7243 Power convergence PCB Resistor is R7731 part of bias for convergence IC I think.. but looks burnt


R7711, R7721,
R7116, R7726, R7736, and R7731. are MF, 1.2 ohm, 2W resistors--MF means metal film or metal oxide--check all of them if you are replacing the two STK-392-110 CHIPS---

They are protect resistors in case some part of either chip shorts--if even one is bad--you need to replace both chips at the same time and adjust.

If you need help or advice let me know--I am here to help.

If this information helped you rate this solution as I do this here for free.

SD TECH

156dc47.jpg

Jan 02, 2010 | Toshiba 55H70 55" Rear Projection...

1 Answer

Toshiba TP50F50 rear projection tv power light blinks on&


did you purchase these because you thought this was part of the problem? if is a convergance problem you should have some picture it would be distorted or color bars would be on the left or right of the screen. if the light is flashing and you have no picture at all or any audio you have a power supply problem. it is not letting the proper voltage energize the main board.

Sep 02, 2008 | Toshiba TP50F50/51 50" Rear Projection...

1 Answer

My colors all of a sudden went out of wack


Today, I started researching the exact same problem on the same model TV. From what I've learned, it seems this model TV (and many others with this part) suffers from a part that runs hot and is not very reliable. The part so frequently goes bad, that one person on the forums bought the parts for "when" not if it goes bad. So, you are far from alone.

The failing part apparently responsible for the color convergence problem you are experiencing is the STK392-110. There are two of them in your TV and together they control the color convergence of the 55H70. Basically, these 2 ICs need to be replaced with the newer and more reliable replacements, the STK394-160 (alternatively, you can also use the STK392-150 or STK329-180, but the STK394-160 is the latest and greatest equivalent for the original part). It is best not to replace the STK392-110 with another STK392-110 (which is what many repair shops will do).

To perform the replacment, you have 2 choices:

1. Hire out a repair at $400-$700. However, often TV breaks again with same problem in less than 6 months because many TV repairman replace only the bad ICs but not the "feeder" parts (i.e. resistors) so these bad feeder parts fry the new ICs also in one week to 3 months. If you hire it repaired, make sure the repairmen has checked the resistors around the IC to ensure they are within tolerance. Also, the repairmen should use thermal compound to reseat the ICs back to the heatsinks. Otherwise the repair won't last.

2. Fix it yourself for under $60. The process can be tricky, but if you are slightly technically inclined and know how to use a soldering iron, you can fix it yourself with less risk of it breaking shortly after.

IMO, option #1 doesn't make sense for a TV that is over 4 years old. That's just too much good money after bad. If option #2 is not feasible, personally, I'd rather put the $400 to $700 or more toward a newer model.

However, if the thought of holding a soldering iron doesn't intimidate you, then option #2 can make a great TV _better_ than new. So, assuming you choose to fix it yourself, this is what you'll need to do (AFAIK). First of all, make sure you only get Sanyo original parts (lots of Chinese knock-offs that don't last). The original STK394-160 is best purchased from a reputable Hitachi licensed dealer (Hitachi apparently makes the 55H70 and Toshiba puts in name on it). B&D, acme-sales, vance, tritronics are all good choices to buy reliable, Sanyo parts from. The STK394-160 is newer and harder to find. Best way to obtain this part if via the Hitachi kit part number X480293. I just purchased the part number X480293 , which I just purchased from Tritronics for $37 + $9 shipping at:

http://www.tritronicsinc.com/storefrontB2CWEB/itemdetail.do?action=prepare_detail&itm_id=567178&itm_index=0

This repair kit includes 2 STK394-160 ICs. Both will need to be replaced (even if only one is bad). This kit includes both ICs, plus some extra resistors. While the ICs are used in many TVs, the resistors have Ohm values that are specific to each TV. So, the resistors in the kit will likely be of no use to you on the 55H70. Still, it is a good idea to test all the resistors in your TV (R7711, R7721,
R7116, R7726, R7736, and R7731. are MF, 1.2 ohm, 2W resistors according to service manual) with a meter and make sure they are still reading the manufacturer values they are suppose to. If their resistance has changed from original specs, they will likely destroy the new ICs. Look for bad solder joints and resistors that test bad or look fried and replace and resolder. Pull the old STK392-110 ICs and replace with the new STK394-160 ICs. Be very careful while inspecting those solder joints and resistors because missing even one minor problem can prevent success. Also, remember to use the thermal compound to reseat the ICs against the heatsinks.

If this doesn't work and you have checked all the resistors and solder joints, the convergence yoke may also have problems. But cross that bridge when/if you come to it.

Some useful links with more instruction and pictures on how to do this replacement:

http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html
http://www.fixya.com/support/t287302-put_stk392_110_part_in_tv_fix_double
http://www.hometheatershack.com/forums/service-support/5600-crt-based-rptv-convergence-repairs-5.html
http://www.fixya.com/support/t284130-green_pillow_after_conv_ics_replaced
http://www.fixya.com/support/t116226-convergence_ic_stk392_110_vs_stk392_110t

Note: I'm no expert and basically in the same boat as you. Just sharing what I've learned. So, any experts, please let me know if I missed or incorrectly stated anything.

Dean

Dec 13, 2008 | Toshiba 55H70 55" Rear Projection...

1 Answer

Color bowing


Replace both STKs if they are 392-110s upgrade to 180s also ck these low ohm resistors r7711 R7716 and R 7720 1.8 ohms

Dec 09, 2008 | Toshiba 57H81 57" Rear Projection...

1 Answer

Color bowing top and bottow of tv


Replace both STKs upgrade to 392-180s if they are 110s also ck R7711 R7716 and R7720 1.8 ohms.

Dec 09, 2008 | Toshiba 57H81 57" Rear Projection...

1 Answer

Color bowing at top and bottom of toshiba 50fx30b


Replace both of your STKs 392-110s go to 180s also ck R7711 ,R7716 and R7720 1.8 ohms

Dec 09, 2008 | Toshiba 57H81 57" Rear Projection...

1 Answer

Toshiba 42h82 convergence resistor and pico locations


(6) 1.8 ohm 1watt metal film resistors for R7711, R7716, R7721, R7726, R7731 and R7736 yes the STK 392-150 will work fine.

Sep 24, 2008 | Toshiba 57H82 57" Rear Projection...

1 Answer

Convergence Problems/Toshiba TP50F50/51 50 in. Rear.


yes, but make sure you get the parts from a reputable seller.. They do have knock offs as well as chips that didnt pass the full test sold cheap which will work temporarly and then fail again.

Sep 02, 2008 | Toshiba TP50F50/51 50" Rear Projection...

1 Answer

Replacing Convergence IC's, I found a bad resistor needing replacment


They are both 1.8 ohm 1watt fusible resistors. Metal film 5% 1.8 ohm 1watt will substitue them

Aug 08, 2008 | Toshiba 50H71 50" Rear Projection...

Not finding what you are looking for?
Toshiba 43H70 43" Rear Projection Television Logo

Related Topics:

432 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toshiba Televison & Video Experts

The Knight
The Knight

Level 3 Expert

75581 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Jaime Hernandez

Level 3 Expert

2336 Answers

Are you a Toshiba Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...