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L70S+,L70S+(Lift Stand)/L72S, L72S(Lift Stand) TFT LCD Color Monitor TECHNICAL SERVICE MANUAL L70S+/L70S+(Lift Stand),L72S,L72S(Lift Stand) Technical Service Manual Safety Precaution WARNING Service should not be attempted by anyone unfamiliar with the necessary precautions on this monitor. The followings are the necessary precautions to be observed before servicing. 1. When managing this monitor , cover with shield plate to avoid to scrach on LCD surface. 2. When replacing a chassis in the cabinet, always be certain that all the protective devices are put back in place, such as nonmetallic control knobs, insulating covers, shields, isolation resistor capacitor network etc. 3. Before returning the monitor to the customer, always perform an AC leakage current check on the exposed metallic parts of the cabinet, such as signal connectors, terminals, screw heads, metal overlays, control shafts etc, to be sure the monitor is safe to operate without danger of electrical shock. General Information 1. Description This 17" LCD color display monitor is operated in R, G, B drive mode input. 2. Operating instructions 2-1. Front Power Switch , Menu, Select, Down, Up, DPMS (Power) LED 2-2. Rear Input connector (AC & Signal Cable) 2-3. OSD Controls H/V Position, Clock Phase, Brightness, Contrast, Recall, Color Control, Language, Auto Adjust, Miscellaneous, Audio control, Auto Color 3. Electrical Characteristic 3-1. Power Supply AC/DC - Input Voltage : 90V~264V Input Current : 1.0 A Max Input Ferquency : 50 ~ 60Hz - Output Voltage 12V/5V Output Current 2A/1.5A 3-2. Video Input Signal Level : 0.7 Vp-p analog signal(at 75 ohm termination to ground) Polarity : Positive 3-3. Horizontal Synchronization Signal Level : TTL High : 2.4V min Low : 0.4V max Polarity : - or + Frequency : 31kHz ~ 80kHz 3-4. Vertical Synchronization Signal Level : TTL High : 2.4V min Low : 0.4V max Polarity : - or + Frequency : 56Hz ~ 75Hz --1-- Control Description Front View Power Switch / LED Indicator Support Modes H Frequency V Frequency H V Dot Clock NO Resolution (Hz) (kHz) Polarity Polarity (MHz) 1 720 x 400 31.5 70.1 0 1 28.322 2 640 x 480 31.5 59.9 0 0 25.175 3 640 x 480 37.5 75.0 0 0 31.500 4 800 x 600 37.9 60.3 1 1 40.000 5 800 x 600 46.9 75.0 1 1 49.500 6 1024 x 768 48.4 60.0 0 0 6