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COLOR MONITOR DP17L* (For implementing TDA9113) SERVICE Manual SUPPLEMENT-1 Supplement to the Service Manual DP17L* This supplement contains information which differs from service manual DP17LS/LT Use both this supplement and service manual part number BH68-00129A. COLOR MONITOR CONTENTS 1. Troubleshooting 2.
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Samsung Electronics Co., Ltd. October 2000 Printed in Korea P/N : BH68-00129A-02...
1 Troubleshooting 1-1 Parts Level Troubleshooting Notes: 1. If a picture does not appear, fully rotate the brightness and contrast controls clockwise and reinspect. 2. Check the following circuits. • No raster appears: Power circuit, Horizontal output circuit. • High voltage develops but no raster appears: Video output circuits. •...
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1 Troubleshooting 1-1-2 DPMS Failure WAVEFORMS Check signal source H/V sync video level. 100V (IC601, #1) Make No H/V sync (power off mode) CH1 P-P = 100V CH1 RMS = 325.8 V LED blinks Check IC201 Pin 40. +12 V line off Check IC201 Pin 5.
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1 Troubleshooting 1-1-3 H_Deflection Failure Does PWM output signal appear Does DC 12V appear at Check 12V line. at Pin 28 (H_out) of IC401? Pin 29 of IC401? WAVEFORMS Check IC401. 2.00 V (IC401, #28) Does Horizontal paluse signal Check IC401. appear at at Pin 26 of IC401? CH1 P-P = 2.00V CH1 RMS = 5.868V...
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1 Troubleshooting 1-1-5 H_Lin. Failure IC201 Pin 21 voltage varies with Replace IC201. different H_Lin. DAC values? IC603 Pin 9 voltage varies with Check +12 V, –10 V line. different H_Lin. DAC values? Check some parts around IC603. Check Q412, Q413, T402. 1-1-6 Invariable H_Size IC401 Pin 28 voltage varies with Check and replace IC401.
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1 Troubleshooting 1-1-8 Side Pin or Trap Failure WAVEFORMS IC401 Pin 24 output exists? Check and replace IC401. 1.00 V (IC401, #24) Refer to 5-1-7 Abnormal H_Size . CH1 P-P = 1.00V CH1 RMS = 3.008 V 1-1-9 Para. or Pin Balance Failure IC401 Pin 24 output varies with Refer to 5-1-7 Abnormal H_Size .
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1 Troubleshooting 1-1-11 V Deflection Failure WAVEFORMS 13 V, –10 V line is on? Refer to 1-1-1 No Power Supply 500 V (IC401, #23) IC401 Pin 23 output exists? Check and replace IC401. CH1 P-P = 500 V CH1 RMS = 1.425 V 10.0 V (IC301, #6) Check and replace some parts IC301 Pin 6 output exists?
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1 Troubleshooting 1-1-13 High Voltage Failure WAVEFORMS Check and replace IC401 IC401 Pin 28 OSC pulse exists? 2.00 V (IC401, #28) and +12 V line. Q402 Gate driving pulse exists? Check and replace Q401. CH1 P-P = 2.00 V CH1 RMS = 5.868 V 2.00 V (Q402, Gate) Check and replace Q403, Q402 Drain pulse exists?
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1 Troubleshooting 1-1-15 Dynamic Focus Failure WAVEFORMS IC401 Pin 32 output is right? Replace the IC401. 2.00 V (IC401, #32) Some parts around Q551 are right? Replace failed part. CH1 P-P = 2.00V CH1 RMS = 6.124V 50.0 V (T502, #6) T502 Pin 6 input is right? Check and replace C432.
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1 Troubleshooting 1-1-16 No Video WAVEFORMS Check signal cable and connection. 1.00 V (IC101, #5, 8, 10) IC101 Pin 5, 8 and 10 inputs Check the signal cable connection. are right? CH1 P-P = 1.00V CH1 RMS = 2.452V 1.00 V (IC101, #21,24,26) IC101 Pin 21, 24 and 26 Check I C bus and +12 V line.
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1 Troubleshooting 1-1-17 Micom Failure WAVEFORMS IC201 Pin 11 input voltage is 5V? Check IC604. 1.00 V (IC201, #13, 14) IC201 Pin 13 and 14 inputs Check C202, C203, X201. are right? CH1 P-P = 1.00 V CH1 RMS = 2.108V IC201 Pin 18 input is right? Check IC605.
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1 Troubleshooting 1-1-18 OSD Failure WAVEFORMS Check CN104 and connector Ass’y. 1.00 V (IC104, #6) Check and replace Q102. IC104 Pin 6 input is right? Check CN102 Pin 14. CH1 P-P = 1.00V CH1 RMS = 4.516V 1.00 V (IC104, #17) Check and replace Q101.
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1 Troubleshooting 1-1-19 User Control Failure Does the DC level change at Check the button. Pin 36 of IC201 when you push the (SW201 ~ SW204) button S/W? Check IC201. 1-1-20 Degaussing Failure Check degaussing connector. RL601 operation is right? Check D-coil and TH601.
1 Troubleshooting 1-2 General Troubleshooting 1-2-1 No Picture LED blinks? Refer to 1-2-2 Shut down. LED is green color? Check Micom. Check G2 voltage, high voltage, R, G, B cathode voltage. 1-2-2 Shut Down Blinking LED’s? Check power supply. Check horizontal, vertical deflection Scan failure system and check power supply secondary voltages.
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1 Troubleshooting 1-2-3 Missing Color WAVEFORMS Are proper Video levels 10.0 V (R,G,B, Video) Check signal generator. on CN101 (D-Sub) Pin 1, 3 and 5? Are proper Video signal on all Refer to 1-1-16 No Video. cathodes? CH1 P-P = 10.0V CH1 RMS = 17.02V Check IC101 Pins 15, 16 and 17.
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1 Troubleshooting 1-2-4 Visible Retrace Check white balance adjustment. Check D502, D503, Q501, Is G2 voltage right? and adjust G2. Is blank pulse on Pin 17 of IC401? Check IC401. WAVEFORMS 5.00 V (Q303, Collector) Is V_FLB pulse on Check Q303. Collector of Q303? CH1 P-P = 5.00V CH1 RMS = 28.33V...
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1 Troubleshooting 1-2-5 Unsynchronized Image Check input signals Pin 2 and 3 of CN202. Are signals right? Check Video Cable. Signals at Pin 28 and 29 of Check IC201. IC201 are right? Signals at Pin 1 and 2 of Check IC401. IC401 are right? Check circuits on Main board.
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1 Troubleshooting 1-2-6 Misconvergence Try readjusting convergence. Is the convergence now Done within spec? Readjust convergence. Is the convergence now Done within spec? Change CRT and readjust convergence. Done DP17L* 1-17...