LC-32SA1E (serv.man2) — Sharp TV Service Manual (repair manual). Page 16

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LC-26SA1E/RU, LC-32SA1E/RU
5 – 1
LC-26SA1E
Service Manual
 
CHAPTER 5. 
ADJUSTMENT PROCEDURE
The adjustment values are set to their optimum at the factory before shipping.
If by any chance a value should become improper or a readjustment is required due to part replacement,  make an adjustment according to the fol-
lowing procedure.
[1] After replacement of any PWB and/or IC for repair, note the following.
When replacing the following units,  be sure to prepare the new units loaded with updated software.
• Note that an IC into which ROM data is written is available for MAIN-UNIT servicing (see below)
[2] SOFTWARE UPDATING
There are 3 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.
• I2C method is required when the VCTp fiash is empty or corrupted (it means, any software inside IC running).
1. 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 soft-
ware because it’s include in all Windows versions as an accessory, and you can find it inside “Accessories\Communications” folder. For this rea-
son, 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 properties as follows:
MAIN-UNIT : DUNTKD890FM12 (LC-26SA1E/K/F/I/RU)
DUNTKD890FM13 (LC-32SA1E/K/F/I/RU)
IC1901
VHi24LC2BiNEES    EDID(HDMI)
IC2303
RH-iXB731WJZZS   EDID(PC)
Computer
TV set
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4) Click on “File\Properties” menu for selecting the General and ASCII properties as follows:
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 as follows:
9) 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\HyperTermi-
nal\HyperTerminal” folder and follow next procedure:
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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 pro-
grams\Accessories\ Communications\HyperTerminal\HyperTerminal” folder.
4) Using “Transfer\Send file...” menu, select desired file (.bin format) and the transmission protocol (Xmodem) as show below.
5) After press “Send” button the updating process starts as follows:
6) When flash update process finishes, the”Flash Programming Complete” label appears in the screen.
VERY 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.
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2. RS-232C Method Description (Tera Term)
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:
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:
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1) Select:  Serial
COM X→ O.K.
2) Select:  Terminal
3) Choose the same options as the above picture.

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