【January 13, 2010 increase: Click here to view the highly recommended black failure on maintenance BenQ displays detailed explanation】. .
http://www。.594ku。.com/article/?id=219。.
Also can refer to the following several diary:. .
BENQ BenQ monitor repairs FP71G + please watch the following articles:.
http://www. .594 Ku. .com / article /? id = 4. .
http://www。.594ku。.com/article/?id=93。.
http://www. .594 Ku. .com / article /? id = 205. .
Friends of BENQ.
FP71G + monitor is broken, because my display is the black model and I have had, I repaired, so the friend brought me to repair the machine. .
Tell a friend ask me to help her fix, if I say that they do not exceed the cost of 10 dollars, that girl troubles me secretly moved to shop, Cook said to 200 ocean, she moved back again, hehe.
Because of the previous maintenance experience, I ask him what the phenomenon (with the signal the green light, no signal yellow) do not see the display on the first go to the C5707, FU9024 (FR9024), 0. .22 Capacitance bought, and. .
I'm sure her fault and I was more or less the same.
Open the lid, first resistance measurement Insurance 3A, the result infinite resistance, a good sign! And thought the same. Look FU9024, heat metal that side there are many spots, and some yellow, clear high current burns out. Use. .
Resistance of two stalls C5707 resistance between the legs, to zero, it seems that both are bad. Look again at 0. capacitance No .22UF any deformation, regardless of it.
New ones FR9024 (FR9024 and FU9024 parameters the same, but longer if the pin FR and somewhat yellowed, so my son) and two C5707, install a good, open. .
.Yeah! see machine. "BENA" typefaces.
Pleased to disconnect the power immediately, tighten the screws well, received a computer. . Read display, wow, that Desktop. .
Approximately 2 seconds suddenly goes black.. my mother zahuishi? sinking feeling.
Remove the circuit board to check again, check the fuse with a resistance profile, FR9024, C5707, no abnormality was found. .
Power on or power-on, BENQ "appears for 1 second after a black screen, why? why? possible reason: 1. screen backlight is broken; 2, high-voltage ring is broken; 3, TL1451 bad.
The. .
The following is the work of the investigation, first check the output voltages, FR9024 results continue to appear in digital form. ** 0 Volts, and that group's normal circuit voltage is FU9024 0 ~ 13V-beating.
After 2 seconds a black screen until the end. Now to find a fault, it is the maintenance of this group of power boost circuit simply did not work. .
TL1451 11 feet output is a PWM signal, the signal passes through two SMD transistor control FR9024 repulsive, to be sure there is a problem in this part of the circuit, because the newly loaded FET.
FR9024 is bought back, and I suspect that this time the two SMD transistor or TL1451 problem. For the time being did not mind, I first FR9024 taken out from the circuit board, with a 2A fuse. .
Connect the original FR9024 DS pads on both ends is forced to back-level circuit power, check point backlight tubes. The result is a display of two backlight tubes lit properly, this description changed.
The two C5707 is a good, able to work. Now back to check FET FR9024 part of the problem. .
I used the original when measuring voltage 20V FR9024 g foot pads on the voltage, the results show that is about 13V, shouldn't this be driven FR9024 breakover voltage, but why not previously to the circuit for the later stages.
CLP Power? Is it? . .
FR9024 is bad?.
But I remember the previous measurement is not short-circuit between DSG, although no breakdown phenomenon, but not enough to say it is good. So I changed up another FR9024 welding, electricity. .
Show "BENQ" after the English words "signal cable appears not connected," HA!.
The maintenance is the biggest achievement for me to study this carefully monitor the power supply circuit, high voltage circuit. Another feeling is to go online to ask people or less, the efficiency is very low, the best way is to hold circuit research. .
The analysis of the possible causes.
Why add that under the black after 2 seconds, it is because a group of two step-up circuit in the other group were not normal normal, triggered a balance of protection automatically closed. .
This week a big task finished, but there is also a difficult task: website; there is JAC excavators that instrument programs haven't write; there is a test. So 。.
busy!. .
Recommendations and then read this article: http://www. .594ku. .com/article/? id = 4.
For questions, please comment below bar message. .
The red circle in the figure of the parts.
FU9024 circuit. .
PWM control to the average voltage circuit size, adjust the brightness.
C5707 peripheral boost circuit. .
> High voltage DC-AC function.
Added:. .
2588848 letters to the Editor:.
Taobao received today sent the parts store, which I fixed capacitor leakage, weighs. .
Put.
3A Insurance-for-down, test does not blow, there is resistance. Remove the capacitance test, no breakdown, and then go up to try welding machine (projected light to turn off). Meanwhile, the capacitor on the left of the C5707 also for a new, added. .
Original replaced by 9024 and right-5707, only the capacitance is not changed.
Connected to the books VGA port, power up, the light, and saw the desktop. Switch back and forth several times (no time off), black, and the lights flashing, the slanting can see the BENQ logo. Measurement of power again. The same. .
Both sides of the capacitor is short, 5707 3A insurance did not burn, 9024 measurements and the other is the same.
Under the 5707 re-welding the two measurements, the left did not burn, burned right. Power Plate bottom two signs are "S4" black do not know what components, on-board measurement of resistance is the same, turned around red, black ink test. .
Amount, which is not the same.
Do not know the other will not burn. .
BenQ this plate, there seems to be a problem as long as the capacitor will these burning pipes.
Also, you made. .
Tianjin maintenance data in, as long as an appropriate 5707, a group of another also needs to be replaced, otherwise, or easy burning later. I do not know are not necessarily need to do to get what you want and after.
Experience, thank you. .
Reply to: spring water.
I feel capacitance variation, reducing the possibility of bigger capacity. Because the capacitance reduction will lead to increased frequency and increased the burden of C5707, C5707 burn up. .
In addition, the two best are parameters C5707 consistent, that is, it is best to use the same model, same batch, you also purchase C5707 will normally be the same batch.
9024 also get a new one even better, because when the C5707 circuit, and 9024 of the current will be bigger and may cause quality deterioration. .
I suggest you can do on C5707, powered welding, first check the fuse (fuse, his resistance should be close to zero, if not, then there is a problem with the fuse) have no voltage output, para.
Second, the output of cloth checks 9024 whether the output voltage fluctuations, can explain if PWM is normal. Fault lies in the C5707, 0. .22 Capacitance, high voltage transformers above. .
The Board has two sets of PSA is right, you can power the measurement of the multimeter circuit between the two groups each point-to-ground resistance (measured after the black and red pen interchangeable multimeter test can detect transistor is the reverse of the situation.
Conditions), with that group to compare the group of normal out of trouble, may be identified through differences in resistance breakdown. .
Step by step to troubleshoot faults!.
2,588,848 letter:. .
Thank you again made some maintenance inspection experience, live measurement or less afraid to engage. Fear is an electro to 240V, high pressure area.
Online Shop today received a replacement capacitor, yellow (275V..
15cm pitch) you the kind of change, a little, I bend 90 °, capacitor parallel diagonal board installed in the empty room, and two off 5707. Change two new 5707.
9024 and the insurance because the measure 3A without bad, no-change, and 17:00 to open your mail, 3 points before the weld, repaired, normal use for more than two minutes, and 9024 to ignore it. .
Welding fine, fine for about 10 minutes later, I opened the metal cover and touched a few components, four voltage are hot, new capacitance ratio following 160V capacitance seems to heat up a bit. 5707 and 9024 are.
Not very hot. .
This screen is not open air conditioning in summer, the continuous use of burning, you should first is the expansion of the capacitor. It is not difficult to understand, Internet hot, black many situations.
By BenQ capacitance map design should be replaced by a pair of capacitors. .22 160, so the two capacitors, one will be much smaller chance of bad. .
We hope this fix, you can use a little long.
2009-05-29 webmaster added:. .
Thanks friends for a YJH circuit board picture, I picture identifies this article involves components; in addition, I opened the shop, facilitate getaobao purchased components.
The figure I use the zero-maintenance device, from left and then click Yes. .
Safety capacitor 0. .22uF275V, 3A250V C5707 transistor, fuse, FU9024 FET.
Need to purchase these components friends go to my shop to buy Taobao:. .
http://shop34032082。.taobao。.com/。.
Note: The shop is no longer product. Please go to http://shop35248517. . Taobao. . Com /. .
Note that the replacement should be as far away as possible from C5707.0 .22uF capacitance, because of the fear of capacitance and C5707 hot! is a little heat, heat capacitance itself himself.
Replacement components test machine before you remember to fuse another good, because before the fuse can protect the power circuit level. Otherwise, if the replacement of the circuit is short-circuit may burn out problems even before the class power. .
Netizen.
Comment. .
88888 2010-04-05 12: 12: 10 115. .214. .106. *.
My black and your not the same black screen of display lights off that is why the ah. .
Sand waves 2010-03-22 22: 50: 03 .115.125... * .90.
3A of the insurance has been burning, how does matter ah. .
Passers-by 2010-01-20.
09:16:54 114. .95. .2. .*. .
FP71G + black has a lazy solution, powered by the power switch on the screen (right), the LEDs light up, and then use a leftmost clamps that key, can be a normal display.
Said. .
If the indicator light, tools need a big clip.
Display 2009-11-29. .
11: 10: 36 183. .66. .122. *.
A question Kazakhstan. .
My monitor BenQ fp71g + is also in the preceding paragraph, it is not the time to several hours they become pink screen back I think that is a computer graphics of ask.
Questions directed at the system for driver == Well, but there is always behind you is the color of a dialog box that displays those buttons in front of a lot of inconvenience to me today where the surface of a determined effort to cut the signal line. .
The only power and signal line results less color do is inside the thread cannot cut?.
j598 is not that 9024? 2009-09-21 11:18:47 60. .217. .248. .*. .
Ask the teacher: j598 is not just a beginner in Tianjin 9024?.
Springs Re: Hello! J598 is not. .
9024. I checked the other two components of PDF documents, performance parameters, the order is consistent, the pin can be used to replace, FR9024 FU9024, 11P06 can also.
Dishes 2009-09-05. .
20: 31: 30 61. .178. .22. *.
Ooo, ooo, I board the following two blue components (the middle white substance attached) as the capacitance to the demolition explosive paste, and re-discovered on top a capacitor Figure pin loosened. Also. .
There is, how do I buy the capacitor will be below the blue?.
Springs back: "I board the following two..
The blue component (in the middle of the white substance attached), "the white substance is used to prevent fixed components of the symbol. Are you the kind of small capacitance no, you must use the cubes of safety capacitor, please be sure to note.
Italy. .
Rhymeli 2009-07-29 21:47:26 58。.248。.216。.*。.
You really Liaoshirushen Well, today I put the computer Naqu a maintenance point of the city computer repair, and really bad the three who 5707,9024, and as man received a total of 80 yuan. .
However it is better than the official point of 130 + change fee is much cheaper, because I did you talk to him on a Web page, said that he thought I really understand why can't bargain fares, thank you!.
Springs back: You're welcome! Oh, I am glad to listen. .
To the maintenance of good news for you.
sala 2009-07-11 21:01:50 59. .60. .66. .*. .
Why does my Board and your completely different?.
Spring Reply: Yes FP71G +? If. .
The trouble is, take a photo show me, EMAIL: springhsq (#) .com. 163.
Thank you!. .
Computer alfy 2009-07-09 19: 03: 57, 116. .232. .121. *.
I replaced the bad PE548 with 9024 also replaced the C5707 is also good, and Weld's also all that can be filled or burned a power line I used my 9024 insurance, copper wire also connected. .
Blew what's going on here.
Novice rookie 2009-06-21 15:18:31 222. .71. .51. .*. .
Hello, I would like to ask how to detect 9024 voltage (table pen testing which two feet?), AC or DC?.
Spring return: FU9024 is FET. .
Tube, multimeter is not very good. You can Baidu search field effect tube measuring or bad article.
ken 2009-04-14. .
22: 24: 25 61. .140. .164. *.
Can you tell me that the two groups with high-pressure plate of red and blue line is how even the What? Split down today does not remember the line order;. .
Spring return: I'm very sorry, I don't even remember.
The. .
Elf 2009-03-03.
10:54:48 60. .167. .179. .*. .
Buy online, a part of the capacitance is 275V, changed after running normally, the capacitor is slightly warm, but should be nothing. just didn't notice during welding line took the circuit.
, So when the iron in the discharge of damaged pine fragrance must be James, the first under the capacitor, and then under the 5707, due to its feet very hard, first proposed flip back and forth under the broken legs broken and welded again, using a needle to break the arrived out of it though. .
Trouble but the temperature is not high, and will not damage the circuit board. I want to do it yourself is professionals, have attention to detail. addition direction cannot be reversed, mark corresponds to white metal white. the Board recommends that after welding.
The line connected and running some time in the loading screw and housing. . So as not to not work also removed. . Problems that spring is right, have to thank him for his guidance. . Web site sent me five sets of parts with only a 30 yuan, a friend of mine to contact me. .
(5707, 9024. .0. .22UF275V, 3A) a total of four sets of 13967316066. Thanks again for spring!..
BenQ garbage 2009-02-16 18:03:50 222. .247. .190. .*. .
BenQ LCD is garbage.
4562009-01-21. .
11: 32: 54 116. .28. .83. *.
9024 is that?. .
Elf 2009-01-20.
20:25:11 218. .75. .62. .*. .
But you said those parts can send me? I will pay for it, thank you!.
Elf 2009-01-20. .
20: 22: 34 .62 .75.218... *.
How to contact you ah. I am also a trap. Give me a call? 13514919503 Wuhu. .
99999999999 2008-12-24 20: 23: 48 210. .45. .251. *.
Does BenQ Monitors in the 1203's film of the specific model. .
Spring reply: Hello, I'm very sorry, I'm not.
Professional appliance repair personnel, no contact with the chip. .
Fellow 2008-12-20.
14:56:22 121. .9. .250. .*. .
Amazing! learn skills.
zjq0308 2008-09-04 09:12:23 218. .15. .233. .*. .
Analysis too well, let me pose this electronic enthusiasts are not afraid of the LCD.
Gained 2008-08-20. .
12: 31: 30 218. .24. .205. *.
Analysis very well, especially with the 2A short the board the insurance point to light up a lamp, this trick too with no way out! . .
Pedestrians ?2008-08-17.
17:51:05 222. .216. .36. .*. .
Sharing of experiences, the good one!.
Springs back: You're welcome! . .
Pedestrians ?2008-08-12.
00:03:58 192. .168. .1. .*. .
Today, I also have a computer that would would loom.
I never have taken LCD `~``。 .
Fix look tomorrow would ~.
