Monday, January 18, 2016

SHARP LC-42RD2E Service mode and software update – LCD television repair and service - manual service

Category: LCD television Repair and Service 

Contents of this article 

  • Service mode access  
  • Software Update 





SHARP LC-42RD2

Entering and exiting the adjustment process mode
1) Unplug the AC power cord of running TV set to force off the power.
2) While holding down the “VOL (-)” and “INPUT” keys on the set at once, plug in the AC power cord to turn on the power.
The letter k appears on the screen.

3) Next, hold down the “VOL (-)” and “P (DOWN )” keys on the set at once.
Multiple lines of orange characters appearing on the screen indicate that the set is now in the adjustment Process mode.
If you fail to enter the adjustment process mode (the display is the same as normal startup), retry the procedure.
4) To exit the adjustment process mode after the adjustment is done, unplug the AC power cord to force off the power. (When the power is turned off
with the remote controller, once unplug the AC power cord and plug it in again. In this case, wait 10 seconds or so before plugging.)
SOFTWARE UPDATING
There are 2 methods to update software in the VCTp: I2C method, RS-232C HyperTerminal and RS-232C Tera Term method.
# RS-232C method is allowed when the TV is working properly and the action should be only software upgrade.
RS-232C Method Description (HyperTerminal).
The hardware tools requirement are:
1. A Modem-null (Cross type) DB9 female to DB9 female cable.
2. An adaptor DB9 male to mini-Din 9 pin male cable (Sharp Code: QCNWGA015WJPZ)
3. Make the connections as indicated in the figure:


Before using RS-232C updating method is necessary to configure a Terminal PC software. HyperTerminal has been selected as a Terminal software because it’s include in all Windows versions as an accessory, and you can find it inside “Accessories\Communications” folder. For this reason, please follow carefully the next steps:
1) First time HyperTerminal is used, it’s necessary to configure some settings. Follows next action to configure two connection: low speed
(9600bps) and high speed (115200bps).
2) Create a New Connection file with name “P55_9600bps”.
3) Select a free COM port and select the Port Settings
4) Click on “File\Properties” menu for selecting the General and ASCII properties
5) Select “New Connection” in the File Menu.
6) Answer “Yes” to close current connection and “Yes” to save session “P55_9600bps”.
7) Create a new connection with the name “P55_115200bps”.
8) Select a the same COM port used in item 2 and select the Port Settings properties
Select the same General and ASCII properties as item 3.
10)Close HyperTerminal session, answering “Yes” to close current connection and “Yes” to save session “P55_115200bps”.
To start updating session, click over “P55_9600bps” icon that you can find in the “START\All programs\Accessories\ Communications\HyperTerminal\HyperTerminal” folder and follow next procedure:
1) Check the connection between TV set and PC, sending a wrong command, as for example: “aaa”. TV set returns an “ERR” label as an syntaxis
ERROR (Not correct order or sequence).
2) Send the command “DWMD” to enter TV set in Download Mode. The TV set answer sending same symbol continuosly. If this symbol character
doesn’t appear, please don’t worry and pass to next step.
3) Close this connection and open “P55_115200bps” connection clicking over the “P55_115200bps” that you can find in “START\All programs\Accessories\ Communications\HyperTerminal\HyperTerminal” folder.
4) Using “Transfer\Send file...” menu, select desired file (.bin format) and the transmission protocol (Xmodem).
5) After press “Send” button the updating process starts.
6) When flash update process finishes, the “Flash Programming Complete” label appears in the screen, the device automatically go to switch off, and in a few seconds go to switch on again.
IMPORTANT NOTE:
During the updating time, please don’t use the PC for other purpouses, in order to abolish communication problems between TV set and PC. If TV set was not updated properly, the TV won’t have the software to startup again, and you must follow the “I2C method” to update another time the TV set.
RS-232C Method Description
The hardware tools requirement are:
1. A Modem-null (Cross type) DB9 female to DB9 female cable.
2. An adaptor DB9 male to mini-Din 9 pin male cable (Sharp Code: QCNWGA015WJPZ)
3. Make the connections as indicated.

Software requirements:
To upgrade VCTp software from RS-232C external connector is necessary to use a Tera Term (Pro) free software.
The URL of Tera Term home page is:
http://hp.vector.co.jp/authors/VA002416/teraterm.html
(The address may be changed in future)
Tera Term (Pro) supported operating systems:
MS-Windows 95 or upper
MS-Windows NT 3.5 and 4.0 or upper
Note.- For Windows 3.1 use Tera Term version 1.X.
Copy all the distribution files to an empty floppy disk or temporary directory (for example C:\ TEMP).
Run SETUP.EXE and follow the instruction given by it.
After the installation, the distribution? les are no longer needed, you can delete them or may keep them in the floppy disk.
How to use Tera Term Pro:
When the Tera Term (Pro) program is used, it’s necessary to shape some settings. Follows next action to configure the connection:
1) Select: Serial > COM X > O.K.
2) Select: Terminal
3) Choose the same options as the above picture.
4) Select: Setup > Serial port > O.K. Appear the follow screen:
5) Select follows settings:
Serial port to use: COM x
Baud rate: 9600
Data: 8 bits
Parity: none
Stop: 1 bit
Flow control: none
Enter O.K.
6) Check the connection between TV set and PC, sending a wrong command, as for example: “aaa”. TV set returns an “err” label as an syntaxes
ERROR (Not correct order or sequence).
Send a “DWMD” (capital letters) command to enter TV set in Download Mode. Change a baud rate to 115200.
Select: Setup > Baud rate > 115200 > O.K.
7) Select: File > Transfer > XMODEM > Send
8) Choose the file for upgrade and click “Open”.
9) After select “Open” the upgrade process starts.
10)When flash update process finishes, the “Flash programming complete” label appear in the screen, the device automatically go to switch off, and in a few seconds go to switch on again.
IMPORTANT NOTE:
During the updating time, please don’t use the PC for other purposes, in order to abolish communication problems between TV set and PC. If TV set was not updated properly, the TV won’t have the software to startup again, and you must follow the “I2C method” to update another time the TV set.