Sunday, September 16, 2012

VIEWSONIC N4261W-1M 42 inch LCD TV - FIRMWARE UPDATE

OPERATION OF RS232 WRITING
  • RS-232 mounted one the main board is the main interface writing new firmware.  Can update new firmware to U40 by RS-232.
  • Writing firmware needs;

  1. RS-232 interface built in PC.
  2. RS232 cable.
  3. Pixelworks Flash Upgrade software.
  4. Connect RS232 interfaces between PC and TV set.
FIRMWARE WRITING PROCEDURE
  • Execute Pixelworks Flash Upgrader software.
  • Select Baud rate by 115200.
  • Download "appcode.crams" file.
  • Choose "Flash" Mode entering standby status for writing firmware.
  • Turn ON the TV set.
  • "Bytes Bar" will appear on the screen in few seconds indicating firmware is downloding.
  • The download process will take about4 minutes.  It won't change the original code when download process intercepted.  Once download process finished, system have to take at least 30 seconds updating new firmware.  Make sure power is supplied without interruption; otherwise the system will shut down.
  • System will restart automatically after finishing writing process.
FUNCTION TEST

Check item
Describe

POWER
PRESS [POWER] TO TURN ON OF OFF LCD TV.
REMOTE CONTROL EFFECTIVE RANGE
THE EFFECTVIE RANGE IS 5 MENTER FROM LCD SENSOR.
INDICATOR LED
TURN ON:  GREEN LIGHT.
TURN OFF: RED LIGHT DPMS STATE FOR PC/HDMI MODE : RED LIGHT.
EARPHONE
PLUG IN THE EARPHONE, CHECK THE SPEAKERS IS MUTE.
PLUG IN THE EARPHONE, CHECK THE EARPHONE WORKING.
PLUG IN THE EARPHONE.  ADJUST THE VOLUME AND MAKE SURE THE VOLUME OF EARPHONE FOLLOW THE ADJUSTING.
MENU
PRESS ‘MENU’ KEY TO MAKE SURE THE OSD PICTURE WILL SHOW OUT.
CHANNEL
PRESS ‘CHANNEL’ UP/DN TO CHECK THE CHANNEL NUMBER CHANGE NORMALLY.
PRESS ‘RECALL’ TO CHECK SWITCHING PREVIOUSLY VIEWED CHANNEL NORMALLY.
PRESS NUMBER KEY AND [-/100] TO ENTER THE CHANNEL NUMBER.
VOLUME
PRESS ‘+’ / ‘-‘ TO CHECK THE VOLUME INCREASES OR DECREASES.
SOURCE
PRESS ‘SOURCE’ KEY AND CHECK EACH SIGNAL SOURCE IS NORMALLY.  PRESS HDMI | PC } S-VIDEO | AV | COMPONENT | TO ENTER HDMI, PC, S-VIDEO, AV, COMPONENT MODE.
SCREEN
PRESS ‘WIDE’ WILL SWITCHES IN SEVERAL SCREEN MODE  : AUTO, 4:3, 16:9, 14:9.
PRESS ‘DISPLAY’ WILL SHOW THE INPUT SIGNAL SOURCE.
AUDIO
PRESS ‘MUTE’ TO DISABLE AUDIO.
PRESS ‘MTS/SAP’ TO SWITCH SAP, MONO, STEREO MODE.