VESTEL DVD 4250D – HOW TO ENTER SERVICE MODE – SMPS BOARD CIRCUIT DIAGRAM – FIRMWARE UPDATE
Service
mode_SMPS (Power Supply Regulator Board) schematic_Software Update _ VESTEL
4250D – DVD PLAYER
CD Update Procedure of 4250D
Download
the update file from the convenient link according to your default language
choice.
While there is no CD in the DVD (No Disc Mode) , press “Menu - 1 3 5 7” buttons on the remote control in order to reach the Service Menu of DVD Player. (Note the software version described as “b.xx “ to be able to compare the sw. Version after update process.)
Copy the update file to the desktop and rename it according to the update file name in the hidden menu of the device. [For example If C2M1AS__ is written then rename it like C2M1AS__.rom
If P6M1AS__ is written then rename it like P6M1AS__.rom]
(If you receive the update file already renamed (with addition of .rom) from the customer technical support department by giving the SAP code of the product then burn the already renamed file with nero program as it is shown below.)
While there is no CD in the DVD (No Disc Mode) , press “Menu - 1 3 5 7” buttons on the remote control in order to reach the Service Menu of DVD Player. (Note the software version described as “b.xx “ to be able to compare the sw. Version after update process.)
Copy the update file to the desktop and rename it according to the update file name in the hidden menu of the device. [For example If C2M1AS__ is written then rename it like C2M1AS__.rom
If P6M1AS__ is written then rename it like P6M1AS__.rom]
(If you receive the update file already renamed (with addition of .rom) from the customer technical support department by giving the SAP code of the product then burn the already renamed file with nero program as it is shown below.)
Burn
the renamed files by Nero program with below set up.
ISO9660
> ISO LEVEL-1 > MODE -1 > NO MULTISESSION > JOYLET OFF >
FINALIZE ON
After
burning process is completed, place the update CD into the DVD tray and press
play button.
Wait
to see the update process steps as shown below. When the sw. Update is
completed unit will switch itself to standby mode.
LOADING
> READING > ERASE > WRITING > DONE
Finally,
press the eject button and take out the update CD while DVD Player remains at
standby Mode.
Updating
process has been completed. To check whether it is updated correctly or not,
repeat the first step for comparing software version.
If
the previous and letter names are different, CD is update has completed
successfully. If the name remains same than go through the steps from the
beginning.
If the AC source breaks down while the updating the
unit (main board) will be totally out of order. This kind of units/boards is
out of Warranty.
Brief Information of Naming the File
Software
version differs from each other depending on front models. 23xx and 24xx are
called Old VFD and 25xx and 26xx are called Mini VFD. Each character in the
file name is an abbreviation of a description as illustrated below.
SMPS SCHEMATIC
POWER SUPPLY [SMPS]
> Socket PL2 is the 220VAC input.
> Socket PL3 is used for the power button on the front panel.
> 3.15A fuse F1 is used to protect the device against short circuit.
> Voltage is rectified by using diodes D1, D2, D3 and D4. Using capacitor C33 (47?f) a DC voltage is produced. (310- 320VDC).
> The current in the primary side of the transformer TR2 comes to the SMPS IC (TNY267P). It has a built-in oscillator, over current and thermal protection circuitry and runs at 133kHz. It starts with the current from the primary side of the transformer and follows the current from the feedback winding.
> Voltages on the secondary side are as follows: 12 Volts at pin11 at C42, 5 Volts at C40,3.3 Volts at C38, -22Volts at C44,-12 Volts at D22.
> D14 TL431 is a constant current regulator. TL431 watches the 5 volts and supplies the required current to IC2. There are a LED and a photo transistor in IC2. The LED inside the IC2 transmits the value of the current from D25 to phototransistor. Depending on the current gain of the phototransistor IC3 keeps the voltage on the 5-volt-winding constant.
> –22 Volts is used to feed the VFD (Vacuum Fluorescent Display) driver IC on the front panel.
> Socket PL2 is the 220VAC input.
> Socket PL3 is used for the power button on the front panel.
> 3.15A fuse F1 is used to protect the device against short circuit.
> Voltage is rectified by using diodes D1, D2, D3 and D4. Using capacitor C33 (47?f) a DC voltage is produced. (310- 320VDC).
> The current in the primary side of the transformer TR2 comes to the SMPS IC (TNY267P). It has a built-in oscillator, over current and thermal protection circuitry and runs at 133kHz. It starts with the current from the primary side of the transformer and follows the current from the feedback winding.
> Voltages on the secondary side are as follows: 12 Volts at pin11 at C42, 5 Volts at C40,3.3 Volts at C38, -22Volts at C44,-12 Volts at D22.
> D14 TL431 is a constant current regulator. TL431 watches the 5 volts and supplies the required current to IC2. There are a LED and a photo transistor in IC2. The LED inside the IC2 transmits the value of the current from D25 to phototransistor. Depending on the current gain of the phototransistor IC3 keeps the voltage on the 5-volt-winding constant.
> –22 Volts is used to feed the VFD (Vacuum Fluorescent Display) driver IC on the front panel.
