Service Mode Panasonic GP41 chassis (ic zig-zag)

SERVICE MODE GP41 PANASONIC chassis (using a zig-zag ic VCT)

How to enter service mode:

Minimum volume set.
Press the timer button until the timer display appears.
Press the DISPLAY button on the remote (hold) + press the Vol-Down on the front panel
So going into SERVICE MODE.1
To transfer the SERVICE MODE.2 and 3.


SERVICE MODE.1 used to adjust the geometry.

To select an item use the "3" and '4 '
To change the data value using the buttons Vol Up / Down
Every time change data should be stored directly in with the "OK"
To exit the service menu buttons N (Normal)

MODE.2 SERVICE is for beet Option arrangements that govern the features of relevant models, such as mono, stereo AV, or RF stereo etc.

Option to switch use the "8" or "9"
To change the bit value use the buttons Vol Up / Down
If you change the data value should be directly deposited with the button OK
To exit the service menu buttons N (Normal)

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Reset Motherboard

Although seem trivial, but the steps to reset the BIOS incorrectly can cause the BIOS or motherboard components more damaged, at least that's what it used to be I have ever experienced. For steps Read more:
1. Make sure the computer is not connected to utility power. This can be done by unplugging the power from a stop contact kobel and also unplug the power supply (24-pin power cable) of the computer's motherboard
2. Wait a few moments to make sure the electric current has been lost. To accelerate the loss of (waste) of electric current on the motherboard, we can hit the power button on the computer.
3. Search button or a jumper labeled CLR CMOS. For this there is a jumper consists of 3 pin and 2 pin. To clear the CMOS or reset the BIOS, press the reset button. For the tpe 3 pin jumper position, move to the other side while the jamper type jumper 2 pin, then we should look for first jumpers to menjumper second pin. Let a few seconds in that position
4. After that the move back to its original position jumper position for a type 3 pin or unplug the jumper for type 2 pin. Input cable power supply motherboard. Make sure all terangkai correctly then then connect your computer to an electric .
5. restart the computer. If the reset is successful then the actual BIOS BIOS will return to its original position. And in the case of damage to the computer is not booting, the BIOS reset, after the computer booted normally would be able to return
6. If you reset the BIOS is not successful, do steps 1-2 again, then disconnect the batter y for the BIOS and did go back to step 3-5.
7. If managed well, repeat steps 1-3 again, unplug all the cables on the motherboard, power supply off the battery BIOS and Memory (RAM) your computer. Repeat steps 3-5.
8. The last step is to reset the BIOS if the above has not succeeded is back doing steps 1-2, then off all components on the motherboard, Processor, RAM and other additional Card like VGA Card. Clean of dirt and the motherboard again repeat step 3, this time set aside once for 30 minutes. Then just repeat steps 3-5.

Tank you succes

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Repair power suply

this several trik or manner always we do moment repair part power suply that broken.

*free formerly transistor horisontal-out. because we often do repair pcb without installed crt, so this matter has aimed to prevent so that flyback hasn't spurt when later power suply ok.
*turn on lamp 100w according to series in stripe ac input. usually our lamp continues in dudu fuse (fuse holder) and fuse temporary we are free. the aim so that if still there problem not until botch transistor power or ic power suply. in this way ptc-degaussing we temporary free, because can disturb.
*do cheque according to visual, to look for possibility solderan crack or there elko puffy.
*investigate with volt-meter to ascertain to what elko big hasn't keep load. *sometimes elko big still to keep load so that moment done measurement with ohm metar can causes avo-meter broken or there fire jump so that component power suply add to broken.
*do cheque elko with esr meter in primary part circuit also secondary to look for elko that broken.
*sometimes elko big still always keep load each time try power suply bringed life. so we are pair resistor 20k/2w that solderred direct in second end elko big with a purpose to so that load is throwed away self automatically by resistor this.
*investigate with ohm meter, may be there part short in stripe 300v (primary part) and stripe b+ (secondary part). its way position ohm-meter 1x. paste up probe red in ground (negatip) and probe black stripe positip. normal needle avo doesn't deviate otherwise there short

to ascertain that part power suply ok, so we do manner as follows.

*free serial lamp 100w and reset fuse.
*pair lamp 100w in stripe b+ with ground as load
*if power suply normal, so lamp bright flame and tension b+ measuresed normal.
*there are some type power suply doesn't want to work if direct loaded lamp. to this is so animate power suply beforehand and lamp as new load is installed then.

power suply with tension stand-by low.

*there are some type power suply where is tension b+ very low on course stand-by. *tension b+ normal new if power “on”. so don't until deceived to expected that power suply broken
example polytron can be forced “on” by suck solderan base t505 (picture under)

example sharp can be forced “on’ with men”short” basis-emitor q755 (be picture)

to ascertain that powr suply ok, so we can force “on” with example as follows

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Windows 7 Black Screen

Manner repairs windows 7 black screen this me write based on insident kemaren when repair computer with os windows 7 only display black sail (black screen) in monitor. windows 7 black screen this happen after user success logging but windows can not start up bormally, existing only dark sail display with cursor mouse that stills can menggerak-gerakan.

to repair windows 7 black screen i try to step into windows safe fashion, but the insident being equal, only menampila black sail and can not mengapa-apain again. final i release jurus next in computer repair stage that is with try to return setingan windows to previous condition via utility system restore, and praise be to god in this way error windows 7 black screen can be repaired.

Next my manner repairs windows display 7 black screen by using utility system restore:

1. as usual, will step menu advance boot option with will button f8 at the (time) of windows startup.
2. choose repair your computer
3. in window system recovery option choose (to click) tool system restore
4. will choose restore point that be where setingan windows be returned (restore). to see restore point other can be done with click button show more restore points. click next to continue.
5. will follow step next where will windows will restarting and begin process restore
6. after process restore system windows success, we try to logging again. when not logging, example caused by service doesn't functioned to try computer is restartinged to return.
7. by on windows damage 7 black screen success repaired.

besides by using utility system restore, to repair windows 7 black screen this us also can use manner as follows:

1. download beforehand application fixshell. exe here
2. step into menu advance boot option with depress f8 and choose windows safe fashion with command prompt.
3. run command: sfc/ scannow to repair windows system file and return explorer. exe
4. when does windows window explorer can functioned, run application fixshell. exe on.
5. restart computer.

the above is true manner to repair windows display 7 black screen or known also with term black screen of death (bsod), that is by using utility system restore or application fixshell. good can help. .

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Flash Dvd

mt1389 chip prosesor dvd decoder many used in device dvd product player mediatek. all parts controller and decoder for player device dvd enter mendalamnya, among others: cpu based on 8031/2 (51 assember language), risc interfaces, servo controller, audio dsp, mpeg4, mpeg1/2, jpeg decoder, usb controller, rs-232 controller, output dac, general purpose io (gpio) and others. with system all-in one, make possible to make a decoder/player dvd in size mini and only with single chip controller.

mpeg board that use chip a lot of found market and of course many worn in famous brands also not because the economical value.

before step farther, ever reader hears or may be ever ask:

the goods same but caw remot/button fits?
the goods same but unegual logo?
the goods same but the facilities differ, one there usb other not?


like system embed another, to be able to work normally, prosesor this is necessary use memory rom and external louvre. rom be worn to will laid program that be run by prosesor (the easy if in pc = harddisk), stored program in rom common/usually is called firmware.

manner programmings mpeg dvd there are some manner that is:

use flash programmer external, with release ic, programminged, then installed again and tried.
use the player self with cd file containing rom- (upgrade cd). this manner only can be used if player under normal circumstances.
with pc/computer. mempasaran often met ic flash/rom that solderred direct in pcb, how does the program manner?

to limit theme, only lengten manner programmings mpeg dvd use pc/computer uses interfaces rs-232 (usually called com).

besides mt1389 product mediatek, there chip other of a kind product sunplus, zoran, samsung and others. prosesor can be programminged to repeat with pc. but only will lengten mt1389 author.

in this article, found some part that is:
my part is foreword,
part ii device that wanted,
part iii programming,
and latest part iv peel firmware mt1389.

device that wanted


to programming/mengeflash mpeg with chip mt1389xx, wanted devices as follows:

hardware (hardware)

1. one ware pc/laptop with os windowsxp with minimal facilities there port serial (com) free. com must can menyet at a speed of 115200 bps.
2. one unit rs-232 to logiclevel converter.
3. power supply 5v/2a that stabil to give tension in mpeg that programminged.
4. if computer/pc there is no port serial (com), but there usb, wanted one interfaces usb to rs-232 converter. connection manner (usb) – (usb to rs-232) – (rs-232 to logiclevel converter)

rs-232 to logiclevel converter, can be got at handphone repair stationer. usually used to fill ringtone hp long kind (age formerly class siemen m35 or nokia 3315). interfaces ware/cable pure rs-232 to logiclevel converter with power ration is got from port com in pc.
or, if we like to make self, there two alternative scheme rs-232 to logiclevel converter that test can be used, kind and the scheme as follows:

• use ic max232. ic this detectable at electronic stores with digital specialization, price around ?

• use transistor. although series next leave an impression cheap and simple, but enough good to programming mt1389.

two series take power rations from mpeg board (3v3). to can work normally, use cable head (prepacked ground) longly less than 150 cm (1,5 m).
usb to rs-232 converter/cable, obtainable at computer device seller stores. don't forget install driver and accomodate number com (example com1).

software (software)

author uses software mtktool version 2.42.12, please download in link next http: //monitor. net. ru/forum/files/mtktool_2.42.12_734. rar
after downloaded, extract in folder aloof, unnecessary menginstall, to run program lives double clicks mtktool. exe
programming


location pin/port pemrogaman in mpeg board


you can look for pin/konektor in mpeg board with pin consist of gnd, tx, rx, and gnd (usually in hind side pcb). kadangkala there also mpeg mediatek not found name explanation pin (only consist of pin empty or pin tp). if you find mpeg mediatek berjenis this, to pin tx and rx detectable with massage stripe from ic pin 106=rxd, 107=txd in ic mt1389 256 pin/foots.


successor device


devices ever author have worn with result well enough. along with period development, in this time many found computer not wear/memfasilitasi with interfaces com, existing only usb. for that, author in this time use cable modem to hp nokia with type dku-5 product china/prolific. cable pure usb to rs-232 converter with output logiclevel, so unnecessary use rs-232 to logiclevel converter (ouput can direct mengoneksikan to mpeg direct). the installing even also easier, live install driver, set number com, konek to mpeg and colok to usb.
cable many at sell at konter servis hp or device stores hape and computer. author buys cable dku-5 cheap/usually in the amount rp 35.000. if cable price dku-5 original or good quality, can achieve hundreds thousands rupiah.


device connection



if you use one of [the] interfaces rs-232 to logiclevel like scheme that lengtened in part 2 by connect konektor db9f to konektor com1 available at computer. if computer not available interfaces com, you can connect input db9f to output usb to rs-232 converter beforehand, then input usb to rs-232 mencolokkan to usb free/empty. while connection ke-mpeg- accustommed with scheme.



if you use rs-232 to logiclevel that worn to fill ringtone hp long type:

• cut cable output, usually consist of 3 cables each black coloured, white and blue.

• correlate/solder white cable to pin rx/rxd in mpeg board and correlate/solder blue cable to pin tx/txd in mpeg board.

• correlate black cable to pin gnd in mpeg board.

•  input interfaces (db9f) to com free computer.

if you use cable modem dku-5:

• cut cable output, cable full 6 cables each white coloured, blue, orange, green, black and red.

• correlate/solder white cable to pin rx/rxd in mpeg board and correlate/solder blue cable to pin tx/txd in mpeg board.

• correlate black cable to pin gnd in mpeg board.

• the other cable is not used.

konek power supply 5v appropriate in mpeg that programming/memflash. if in mpeg board there konektor power 12v and -12v, there is no need to use/not given supply. only 5v (digital/principal) that given supply tension.


to be more detail, see picture/illustration next:

picture 1: on: cable rs-232 to logiclevel converter to fill ringtone hp long type (m35/nok3315), under: cable usb to rs-232 converter.

picture 2: close up cable connection. 

picture 3: connection that worn author up to now, use dku-5.

begin to programming


after all connections has been corrected to repeat, now moment it is running program to mengeflash. previous, animate mpeg board with give supply 5v then run application mtktool. exe (link downloads is on part 2), if com and connection menyet truly, will appear application window mtktool will like next:

menu/button function explanation as follows:

• menu port, used to choose port that worn to programming.

• menu baudrate used to choose baudrate (speed) port.

• menu window, consist of: cascade = display all windows; bridge = click this menu if uses bridge/usb to rs-232 converter (not dku-5); partial erase = click/contreng this menu is if we like to wipes certain memory address; auto set flash baud rate = click/contreng this menu is to mensetting program so that mengeset speed baudrate automatically; flash upgrade = display window upgrade.

• box ‘load bin file’ be used to will determine file name yg be programmed to flash eeprom (mpeg). click browse menganan box to open file.

• box ‘backup file’ used to determine reading result file name from flas eeprom (mpeg). click browse menganan box to melokasi (save axis) result file reading/backs up.

• checkbox verify, contreng this box is to memverify repeats automatically when does program writing (writing).

• high speed, contreng this box is if we like to fashion high speed (hardware must support).

• usb to uart bridge controller, contreng this box is if uses usb to rs-232 converter (dku-5 and com direct don't contreng).

back up/read data flash eeprom (firmware)


in affair programming/flashing, back up data step that must be carried out, the aim to check to what connection has appropriate/fitted all at once to keep reading result file from flash eeprom found mpeg (read firmware). while the step:

• fill in file name in box ‘backup file’ for result file backs up. file name best loaded with number design/sasis/pcb in mpeg (for example al1389e-2al-1. bin), the aim simplify to look for firmware when wanted. because firmware design/sasis/pcb different has firmware different also. according to default, file location found in where is application mtktool installed.

• click button backs up. if process backs up to walk successful, the display likes in picture (dependings to setting).

• if walk successful (s/d 100%), repeat process backs up by the name of file back up different (for example al1389e-2al-2. bin).

• now is comparing first file with second file by using program fc. exe (filecompare windows load) by order of:

- enter formerly to commandprompt, click start–run-ketik cmd – ok
- in prompt behind sign ‘>’ type fc /b nama_file_pertama nama_file_kedua
- file name in command fc belong by the name of the folder. example:
fc /b d: \dvd\mtk\al1389e-2al-1. bin d: \dvd\mtk\al1389e-2al-2. bin

• if second file fit/same, please save/mengarsipkan for collection increase bin/firmware because at all time can be programmed in mpeg that has number sasis/design/pcb same.

picture: back up/reading process that walk pure.

flash upgrade/programming


before mengeflash a mpeg dvd, best will back up formerly firmware in mpeg that be programminged! ! !

• fill in file name in box ‘load bin file’, if hesitant/not learn by heart the file location/name, use button browse menganan box to look for.

• click button check sum, register check sum that displayed in logarithm box.

• ascertain check box verify contreng.

• click button upgrade. if process upgrade walk successful, see to what check sum file (see logarithm in latest line) what equal to chek sum that registerred previous. otherwise same, repeat step upgrade.

• reset mpeg lethally power supply mpeg then animate again. see to what mpeg can work normally.

picture: process upgrade 100%

NoteBene

• cable dku-5 author wears to use driver prolific with series pl2303hxa. if you use cable dku-5 original nokia driver wear driver dku-5 from cd the cable load (driver the original).

in one file binnary/firmware result download/read from mpeg can mempecah in a few part. parts example from firmware code/program part and data. to limit topic/theme, only lengten about logo data, data/table remote key and data/table keyboard or panel button.

device that wanted

• software/program mtkremaker. you can downloaded it in link next: http://personal. inet. fi/cool/mediatek/programs/mtkremaker/mtkremaker023b6. zip

• software mtkmpegtool. you can downloaded it in link next: http://personal. inet. fi/cool/mediatek//programs/mtkmpegtool/mtkmpegtool01b1. rar

• software hex editor, author uses software xvi32 hex viewer.

• notepad or editor text.

software mtkremaker used to edit file binnary/firmware, mtkmpeg tool used to convert picture file (bmp, jpg, etc) into format mpg. while software hex editor, used to edit data table file remote or table vfd key.

edit logo

picture 1: previous logo. 

picture 2: logo after replaced.

the steps:

• will make to back up formerly file that be editted (mengopi). file will kopian/back up later be editted

• run program mtkremaker. open file kopian/backs up. click in data part – skin – mpeg 0 (detail see picture 3)

• click right in picture chooses save image, save by the name of logo file. bmp in program folder mtkmpegtool.

• please edit picture file, maintain the size same (in byte) the originally. save with format jpg (don't jpeg2000) be logo. jpg.

• make text file (with notepad) type line next: jpeg2yuv. exe -ip -l0 -n1 -v0 -f25 -j logo. jpg | mpeg2enc. exe -f3 -n p -b 1000 -a 1 -v 0 -o logo. mpg (detail see picture 4). then save file by the name of convert. bat in folder equal to logo file. file convert. bat, mpeg2enc. exe, jpeg2yuv. exe and logo. jpg must stay in folder same.

• run file convert. bat to convert logo file. jpg be logo. mpg

• return to mtkremaker, click right in list mpeg 0, click replace. contents/open logo file. mpg click open.

• save file firmware, after stored, write/upgrade to mpeg board (the steps in part 3).

picture 3: edit logo.

picture 4: convert. bat

replaced table remote

the steps:

• will make to back up formerly file that be editted (mengopi). file will kopian/back up later be editted.

• run program mtkremaker. open file kopian/backs up. in list, look for item that named rc_remotetab (usually in code). click right item choose save, save by the name of remote. bin

• back up file remote. bin beforehand.

• open file remote. bin with program hex editor, edit button by edit notation available (in hexadecimal). don't add or decrease file long/size. because code number remote not yet known, so to adjust remote only with tries. . . . ? ? ?

• after finished editted, save file remote. bin. total byte or file size before and after be editted must same.

• return to mtkremaker. click right in item rc_remotetab choose replace, open/contents with file remote. bin that editted.

• save file firmware, after stored, write/upgrade to mpeg board (the steps in part 3).

picture 5: rc_remotetab

picture 6: edit remote hex


edit table vfd key

its way equal to edit table remote, only in item vfd_buttontab. file name to keep table best called key. bin.

picture 7: edit button

thank pronunciation

author has said maximum thank to mabreaker that do watchfulness, make and prepare resource to this article writing.

casing

this article has only review for self development and doesn't suggest to whoever to meng-crack firmware dvd, because may be firmware found on product dvd protected by law. all risk is underwrited self. thank.

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Flyback for anode voltage generator

flyback as high voltage generator anode crt (high voltage)

• horizontal pulse is used to restrain so that electron light does cleaner picture horizontally from sail left part to starboard. then with horizontal pulse high-speed will return electron light will get left sail to will begin to repeat penyapuan horizontal line next again.

• electron light return pulse so that return to this sail left part is called" horizontal pulse retrace" . this pulses is maked use to arouse high voltage anode by turn on a tranfo in part horisontal-output. therefore tranfo this called tranfo flyback.

• horizontal pulse current retrace that changes by lea in primary part flyback can menginduksi high voltage (hv) in secondary spool around 25 up to 30kv ac. and use mengode this tension menyearahkan is tension dc. as high voltage filter layer aquadaq in tube crt.

• vr or potensio as tall voltage divider is installed insides bodi flyback to get high voltage for focus around 6kv and tension screen around 500v. except that is flyback also used to produce another low tensions like to suply vertical part, heater and 180v for video drive, and tension other for example for video circuit part or audio part (voice).

television sony that use tube trinitron want tension screen around 400" 800v. tension screen is not got from tranfo flyback, but got by menyearah horizontal pulses by turn on a mengode in sexy transistor collector.



why does high voltage generator use flyback?

horizontal pulse frequency magnitude around 15khz. profit with high frequency use to arouse high voltage that coil total tranfo to raise tension that wanted relatip not as much as if membanding use tranfo konvensionil such as those which worn in electricity ac with frequency 50hz (tranfo adaptor). if use transformer such as those which used in adaptor, sure more many will want spool, consume place, and heavy. because put hand to high frequency, so kernel tranfo flyback use ingredient from ferrite



Blooming and breathing

• as high voltage rectifier hv used line dioda seri, so that cause has resistansi internal relatip tall. little current change can cause high voltage drops.

• high voltage drops will causes the speed electron light will decreased and easier is bent by def yoke, so that finally raster will developing horizontal direction and vertical (the term blooming. . . . ). finally if contrast or britnes picture fluctuate can menimbulan disturbance raster pulsate (the term breathing. . . . . ).

• in simple television to Run defect breathing usually is installed a resistor 1 up to 3 ohm 2 watt in stripe b+. if contrast or britnes picture will increase finally current b+ will increase and cause tension drops in resistor growing larger (tension drops v = i am x r). finally tension to horizontal output drops and horizontal deflection also drops so that raster doesn't so to developing.

• big sail television usually wears circuit counters breathing by using pin-eht input found on ic jungel. pulse from flyback related to pin-eht and will related with correction part ew that otomastis will restrain hor-size and vert-size

pulses from tranfo flyback given to part circuit other with function to:

pulse is given to ic mikrokontrol as pulse hor sync, where with pulse vert sync from part vertikal-out worn for character generator osd (on screen menyplay). if this pulse is brokened off so will causes osd will not appear.
pulse is given to ic jungel /video chroma functioned for pulse blangking, signal generator sand-castle, colour processor and as pulse for horizontal afc. 2. if this pulse is brokened off can causes raster blank and osd doesn't appear, or picture a little shift kekiri so that visible there black block in sail starboard.
in several long television models (also in computer monitor) pulse from flyback worn for synchronization to part smps (switch fashion power supply). functioned to cause the loss of frequency disturbance smps towards picture. if this pulse is brokened off can causes problem like, power suply there Ound ngik, power suply not work, back ground picture there disturbance likes wood fiber.

Nb:layer aquadaq black coloured conductor layer membagian outside glass tabubg crt. this layer forms a kind of condenser with layer anode existing insides crt. therefore aquadaq must always be banded to ground well.

Courtesy: Marsono tv

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Download Widows 8

Microsoft merilis windows 8 in conference build that is spreaded out at anaheim, california, tuesday (13/9/2011). windows 8 that introduced really new version to all developers or called developer preview.

but such, can not mean you not can try it. everybody can try it free with mengunduh from sites that provided microsoft. there three versions that provided each two for system 64 beets and one to 32 beets. next three versions that provided next link to download each version.

Link Download WINDOWS8

- Windows Developer Preview English, 32-bit (x86) - Windows Developer Preview English, 64-bit (x64) - Windows Developer Preview with developer tools English, 64-bit (x64)

in chance this me a little will distribute information will hit windows 8 that merilis a few moments then. a lot try to detect several weakness and windows surplus 8 this. let us see several explanations whom i borrow ideas  before My friend does to download windows 8.

microsoft merilis windows 8 in conference build that is spreaded out at anaheim, california, tuesday (13/9/2011). windows 8 that introduced really new version to all developers or called developer preview.

but such, can not mean you not can try it. everybody can try it free with mengunduh from sites that provided microsoft. there three versions that provided each two for system 64 beets and one to 32 beets. next three versions that provided next link to mengunduh each version.
download windows 8

- windows developer preview english, 32-bit (x86) - windows developer preview english, 64-bit (x64) - windows developer preview with developer tools english, 64-bit (x64)

file size from each choice above vary, begin from 2,8 gb for the things topmost 3,6 gb for the things middle and 4,8 gb for the things most under. such as those which declared by microsoft, windows 8 versions developer preview this is not yet finals so that after finished mengunduh, you must keep it at cd or flashdisk.

if choose version with “developer tools”, only can do clean install. but, if you choose other, you can do upgrade from windows xp, windows vista, or windows 7.

before mengunduh, you must genuinely realize that this operating system not yet finals so that still there deficit passim. you also necessary ascertain that hardware that has support windows 8. microsoft declares that any ware that support windows vista and windows 7 can support windows 8.

for windows 8 x86 (32 minimal spesification beet)s prosesor 1 ghz, louvre 1 gb and storage capacity 16 gb. temporary to x64 (64 beet)s, you want prosesor 1 ghz, louvre 2 gb and storage capacity 20 gb. bonchalant choice that mengunduh, you want merectx 9 compliant gpu with wddm 1.0 or driver higher.

may be sekian formerly simple information i borrow ideas from the official site, good friend – friend can read before do to download windows 8.

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