AOC D42H931G, Service Manual

Page: 43 / 119

43
7. Adjustment
White Balance
Tools: Pencil/Gauge one Static ring one
Glove one pair RS232 wire two
VGA wire some
Material: VGA, YPbPr wire some Record card some
Beautiful grain rubber some
Instruments: K8256/Chroma-22291 one
FI box one
ISP card between PC and chroma, monitor one
Locates the fixture one
( Sign use voltage instrument if has not used the voltage is 220V )
PC ( Brings a minute four serial port line) one
Preparation
Connect K-8256/Chroma-22291 with power line, and then turn on PC.
Preparation before adjustment: connect PC, K-8256A/Chroma-22291 and main board, and then connect the signal
wire: connect signal generator port with correspond machine signal port. POWER ON each signal source.
Adjusting Operation
1. Press MENU+1999 to enter factory mode, set the first option ”EEPROM INITIAL”, make ”OFF” to “on”, after again
opens automatically, start to do ADC.
2. Doing ADC needs to connect the VGA wire, YPbPr wire.
3. Firstly, opening ADC Formula, then press
4. If it shows ”NG” in red in adjustment, it shows that adjustment fail. Press ”End” to end progress, check the VGA
and YPbPr Mode, check the picture normal, if it shows ”PASS” in green, it shows the end of the adjustment. Pull out
the signal wire and the power wire, press the air-switch to let the machine to the next station.
Spec&Caution
1. Check main board and FI box connection ok.
2. Before adjustment, please check each equipment is ok and the connection is right. After connecting every wire,
then power on.
Remark: K8256/Chroma-22291 can be used to generate PC and AV signal,
substitutes original PC and the
YPbPr supply oscillator, by saves the instrument.
3. After this adjustment, it is no allowed to enter the factory mode again in later operation.
4. After adjustment, fill in the record card when meeting the bad machine and adhere it to bezel.
5. Put OK/NG card away according to the condition of machine when having a rest.
6. White balance Auto Color program name is Auto Color.exe, configuration files: Auto_Color.ini.
Connection of Equipment
To Monitor To Chroma To RS232 wire
英华家电维修资料专用 QQ:505966338