LC-26SA1E - Sharp TV Service Manual (repair manual). Page 16

LC-26SA1E/RU, LC-32SA1E/RU

5 – 1

LC-26SA1E

Service Manual

 

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.

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)

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. 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