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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