Sanyo LCD-20XR1/AU Service Manual

Contents

SYSTEM) for X210, input 9v(±0.05v) and 5v(±0.05v) to J202 and J203, adjust L210 to let x205voltage to be 1.65v(±0.1v).b. Solder to J201, J202, J203 and J53.3.2 AGC adjustmentReceiving 60dB signal of D-8 or A-7(N system), adjust RP201 to let 3v(±0.05v) of X204.Input 100dB of antenna, the picture should not no-sync and distortion. Input 35-40db low signals,the picture should sync and the sound normal, but the color should not disappear.3.3.3 white balance adjustmenta. Install the unitb. Adjust to brightness for backlightc. Access into the D-SUB channel input 16 level gray-scale 640 x 480@60Hz signal of VGAinterface. Press , 2, 5, 8 and 0 buttons access factory menu, perform “reset ex-factory set” andauto color.d. Exit factory menu, input gray(H)-8 signal, adjust picture mode to “nature”.e. Enter factory menu fixed R-OFFSET1 to 0; adjust G-OFFSET1 and B-OFFSET1 to let secondlevel to fit the table1.f. Fixed R-GAIN to 200, adjust G-GAIN and B-GAIN to let seventh level to fit table1.Table1Color temperature 9300KX coordinate 0.285±0.008Y coordinate 0.293±0.008g. Repeat e step to f step, it must be measure a true value.h. The unit without VGA interface of 20” (N system), you should be rework c step: enter VIDEOchannel, input Gray(H)-16 for NTSC system of VIDEO interface, press , 2, 5, 8 and 0 buttons toaccess factory menu, perform “reset ex-factory set” and auto color.4. Performance checka). TV InterfacesConnect RF port to central signal source. Enter station search menu to auto station search. Aftersystem adjustment is correctly, check if there is any station missing and the output of earphone orloudspeaker and the picture is normal.b). Interface of AV/S Terminalsinput AV signal and switch to AV channel, see to the picture is normal, then input S terminal, check ifit can auto identify is normal. Check if sound is normal.c). VGA InterfaceInput VGA signal (K7253 signal generator). Separately input the several types of VGA formatsignals as listed in Table 1. Then check if the picture and sound is normal. If there has beeninterference to the picture then press the auto set key on the remote control once again and check ifthe display is normal.Table 1 Display Format of PCItem Resolution Picture element clock(MHz)H-SYNC(kHz)V-SYNC(Hz) Remark1 640 x 480 @ 60 25.175 31.469 59.9004ALIGNMENT INSTRUCTION