SAMSUNG 2494HM free download

File name 07_Schematic_Diagram_E.pdf

7. Schematic Diagram 7. Schematic Diagram 7-1. Circuit Descriptions 7-1 7. Schematic Diagram Location Scaler IC202 Flash Memory IC206 EEPROM IC100,IC101,IC105 DVI/HDMI Switch Audio AMP IC803 Function Besides the ADC, LVDS, and scaling part, an MCU is embedded as well. All of them are integrated into one chip. Stores the program and OSD of the MCU embedded in the Scaler. This is a flash type memory and the firmware can be rewritten to it. The memory which receives the Analog, digital and HDMI DDC. Sends either the DVI or HDMI signals according to the input. Controls the input audio signals. Remark SE859MD-LF MX25L4005M2C 24LC02B PI3HDMI1210BE TPA3004 7-2 7. Schematic Diagram 7-2. Schematic Diagram - This Document can not be used without Samsung's authorization. 7-3 7. Schematic Diagram - This Document can not be used without Samsung's authorization. 7-4 7. Schematic Diagram - This Document can not be used without Samsung's authorization. 7-5

File name SAMSUNG LS24KIORFV-EDC.pdf

4. Troubleshooting 4. Troubleshooting 4-1. Troubleshooting 1. Before troubleshooting, setup the PC `s display as below. · Resolution: 1920 x 1080 · H-frequency: 75 kHz · V-frequency: 60 Hz 2. If no picture appears, make sure the power cord is correctly connected. 3. Check the following circuits. · No raster appears: Function PBA. Main PBA. IP-Board · 5V develop but no screen : Main PBA · 13V, 5V does not develop: IP-Board, Main PBA 4-1 4. Troubleshooting 4-2. When the Power Does Not Turn On Symptom - The LED on the front panel of the monitor does not work when the power is connected and the Power button is pressed. - Check if the Power switch on the rear panel of the monitor has been turned on. - Check the SMPS fuse and the IP-Board output power. Major checkpoints - Check the connection between the IP-Board and the Main Board inside the monitor. - Check the power part of the Main Board and check if a similar symptom appears at another output terminal. CN600 IC203 Diagnostics Check the connection status of the Function assy. Main Board Front Can DC 5V be measured on pins 6, 7 of the CN600 connector when pins 3, 4, and 5 are 0V? Yes Can DC 3.3V be measured on pin 3 of the IC203 when pin 1 is DC 5V? Yes Check and replace the main board related to the scaler. Caution No Replace the IP board. No Check the circuits related to the IC203. Make sure to disconnect the power before working on the IP board. 4-2 4. Troubleshooting 4-2-1. Circuit Diagram and Waveform for Power Failures 4-3 4. Troubleshooting 4-3. When a blank screen is displayed (Analog) Symptom - The LED power is on but no picture is displayed on the screen when the D-SUB cable is connected - Even though the LED power turns on, the screen is blank when connecting the VGA cable. Major checkpoints - Check the D-sub cable connections. - Check whether the LVDS cable is connected correctly to the panel. - Check whether the lamp connector of the panel is connected correctly to the IP board. CN400 IC202 X200 R106 R110 R121 R115 R116 Main Board Front Check the signal cables and their connections. Yes Diagnostics Check if X200 is oscillating normally. Yes Check if R, G and B inputs are measured at R106, R110 and R121. Yes Check if Hsync and Vsync are measured at R115 and R116. Yes Check if Hsync and Vsync are measured at pins 32 and 33 of IC202. Yes Do output signals appear at pins 8 to 30 of CN400? Yes Is DC 5V measured at pins 1, 2, and 3 of the CN400? Yes Replace the LCD panel. No Check the +5V_Panel signal and the BL_EN signal. No Check the circuit around IC202. No Check the input part. No Check the input part. No Check and replace related circuits if necessary. No Check the input part. Caution Make sure to disconnect the power before working on the IP board. 4-4 4. Troubleshooting 4-3-1. Circuit diagrams and waveforms (analog) when a blank screen is displayed on the monitor 4-5 4. Troubleshooting 4-6 4. Troubleshooting 4-4. When a Blank Screen