REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Tuesday, 5 February 2019

XOCECO DYNEX LC-26KT46 LC 32KT46 LC37KT46 LC42KT46 - SMPS SCHEMATIC - SERVICE MODE - FIRMWARE UPDATE

Xoceco Dynex LC-26KT46 LC 32KT46 LC37KT46 LC42KT46 - SMPS schematic - Service mode - Firmware update

Fy10 DYNEX 9226/32/37/42KT4610 - Xoceco Dynex DX L3710A, DXL4210A LC26KT46 LC32KT46 LC37KT46 LC42KT46 Service mode Software update SMPS circuit diagram
      KT Chassis, LCD TV Service Manual, Fy10 DYNEX
    Model    Panel type    Part No.          Software name
DX-L15-10A SVA         9215KT4601     LC15KT46SVA.BIN
DX-L19-10A CPT         9219KT4601     LC19KT46CPT.BIN
DX-L22-10A CMO 9222KT4601     LC22KT46CMO.BIN
DX-L26-10A CMO 9226KT4602     LC26KT46CMO.BIN
DX-L32-10A AUO         9232KT4601     LC32KT46AUO.BIN
DX-L37-10A AUO         9237KT4601     LC37KT46AUO.BIN
DX-L42-10A AUO         9242KT4601     LC42KT46AUO.BIN
Factory Mode 
Enter into Factory menu, select and to do Other Settings SHIPMENT item, then the TV will automatically preset the user menu to default. After alignment this User Menu Preset procedure must be done.
SHIPMENT will do the following :
1) Clear all program information
2) Clear V-CHIP information
3) Analog value default setting for all sources
4) Power on mode set to Off
The way to use Factory Menu or Service Menu
a) Press INPUT button, then in turn press “2”, “5”, “8”, “0” to enter the Factory Menu.
b) Press CH+ or CH- to select items, then press OK to enter.
c) Press CH+ or CH- to move the highlight up or down.
d) Press VOL- or VOL+ to adjust the selected item.
e) Press MENU to return to the previous menu.
f) Press EXIT to close the Factory Menu.
g) After closing the Factory menu, you can press SLEEP to enter the Factory Menu directly if power is still on.
h) In Factory Menu, select “On” for “Aging Mode” to turn on aging mode.
Software upgrade instructions
This series’ TV chassis provides two software upgrade ports, one is SERVICE PORT, the other is RS232 jack. To use SERVICE PORT, only a USB device is required and the speed is faster, so it is recommended to use the SERVICE PORT. To use RS232 jack, the speed is slower, and more devices are required such as a PC, a set of fixture for upgrade and upgrade software. It is recommended that only SERVICE PORT fails in upgrade, then use RS232 jack.
Making use of SERVICE PORT for upgrade
Copy file with extension name of BIN (*.BIN) for upgrade to the USB device, save it at root catalog. To upgrade different TV model, the adopted files are
different. It is required to correctly name the *.BIN files, and the above table lists the TV models and file names for your reference.
Method 1
1 Disconnect the AC power, insert USB device into the SERVICE PORT.
2 Reconnect the power, the TV will automatically upgrade the software. It will take some minutes. During the process, the power indicator will flicker in
red and blue. After completion, the TV will auto power on and the power indicator lights blue. If the process takes more than 5 minutes, that means the upgrade fails. Please check the BIN format file and USB device again.
3 When upgrade completed, remove the USB device, disconnect the AC power and then reconnect the power. The SERVICE PORT upgrade is finished completely.
Method 2
1 Connect the power. Insert the USB device into the SERVICE PORT. 2. Enter into Factory menu, access SW Upgrade option. The TV will automatically scan the USB device and files in BIN format. If USB device is normal and BIN file is correct, the TV will upgrade by itself. If fails, then check BIN file and USB device again.
3 When upgrade completed, remove the USB device, disconnect the AC power and then reconnect the power. The SERVICE PORT upgrade is finished completely.
Making use of RS232 for upgrade
Tips: A PC and the upgrade fixture designed for this KT# chassis are required. Use Mstar on-line writing tool – Mstar ISP Utility, the needed time is longer.
1. Power on the TV, connect the upgrade fixture correctly, open the upgrade software, click “Connect” icon.
If the connection fails 
2. Click “Config” icon (see below figure). Adjust “ I2C Speed Setting” option,lower the setting of “Speed”. Then click “Connect” icon again.  Wait until right connection information appears.
3. Click “OK” , then click “Device”
a) Mark “WP Pin pull to high during ISP” option.
b) Mark “New Setting Below” option.
c) Mark Bit7ˈ Bit5ˈ Bit4ˈ Bit3ˈ Bit2 from “Status Register” option. That is,the value of “Register Setting Value” should be “BC”.
4. Click “Read” icon, download upgrade software,
5. Click “Auto”
a) Mark “Erase Device” option, select “File Area”.
b) Mark “Blank”, “Program”, “Verify”, “Exit ISP” options.
c) Click “Run” button, on the right will appear information of upgrade hints. When “Pass” appears, that means the upgrade is successful.
6. After completion, disconnect the power then reconnect it. The upgrade is finished now.
SMPS circuit diagrams (Click on the schematics to magnify)
LC-26KT46 Power Board
LC 32KT46 Power board
LC37KT46 Power board
LC42KT46 Power board
Working Principle of the LCD TV
  The analog and digital RF signal received by antenna will be sent to integrative tuner TUNER2(TD1136/FV, contains HF and IF amplifier circuits), which selects appropriate channel and sends the selected IF signal to the next level by the control of SDA, SCL. The analog RF signal sent to tuner, via high amplify and mixed frequency to get IF signal VIF.Then it will be divided into two ways, one way will be sent to acoustic surface-wave ZF3 to IF filter and get better IF characteristics, then it will be sent to NF1(M61111FP) through pin20, 21 to do intermediate amplification, phase-locked loop VCO and synchronous wave detection and output VIDEOTV(ATV) from pin1; another way will be sent to acoustic surface-wave ZF4 to IF filter and gent better IF characteristics, then it will be sent to NF1(M61111FP) to do intermediate amplification and wave detection and output SIF from pin10.
  The digital RF via high amplify and mixed frequency in the tuner, output deferential digital IF signal from pin16, 17, the signal will be sent to NJ01(MSB1501L) to do intermediate amplification and demodulation, then demodulate the transform stream TS which contains video/audio and other information.
  ATV, SIF, TS, audio/video signal of AV, S-VIDEO , VGA and HDMI;.Component video signal selected by switch NB09(PI5V330W) from Component 1 and Component 2, Then one of video signal selected by switch NB10(PI5V330W) from Component and VGA . AV, S-VIDEO ,Component audio signal selected by switch NB11 (HEF4052BT), HDMI audio/video signal selected by internal switch from HDMI1, HDMI2, HDMI3; all of the signals will be sent to the main IC NS01(MSD229EL) switch select, video decode and process.  In MSD229EL, TS of DTV via TS demultiplex, distinguish the different programs and pick-up the corresponding audio/video stream and data stream,  after MPEG-2 uncompress, video coder and audio D/A transform, recover the analog video signal YCbCr and audio signal L/R.  ATV output from M61111FP will be sent to MSD229EL video switch, A/D convert and digital decode. The video selected by switch embed in MSD229EL will be sent out in two ways: one is sent to decode and process; the other is Video OUT.
  All of the video data (include DTV video) via switch select, video decode and process will be sent to MSD229EL to do D/A transition, image scale, OSD superposition, then LVDS conversion to signal acceptable for LCD panel, namely four pairs of low differential signal and one pair of clock signal, then it will be sent to LCD panel for picture display.  All of the audio signals will be sent to MSD229EL to do audio switch selection and sound effect processing, then output L/R to sound amplifier NV03 (R2S15112FP) amplifying to speaker. The audio L/R also sends to Audio OUT.
  The unit is control by the MCU built in MSD229EL, it connects MSB1501L and E2PROM through IIC bus line and controls the whole unit working
Posted By: FRANK at 06:45
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