CONFIDENTIAL 1 Precautio 1-1 Safety Precautions WARNINGS Leakage Current Hot Check (Figure 1-1): For continued safety, do not attempt to modify the WARNING: Do not use an isolation transformer during circuit board. this test. Use a leakage current tester or a metering system Disconnect the AC power before servicing.
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CONFIDENTIAL 1 Precautions 1-2 Servicing Precautions WARNING 1:First read the “Safety Precautions” section of this manual. If unforeseen circumstances create conflict between the servicing precautions and safety precautions, always follow the safety precautions. WARNING 2:A high voltage adjusted to the wrong value may cause excessive X-ray emissions. WARNING 3:An electrolytic capacitor installed with the wrong polarity might explode.
110 Watt (max) Dimensions (W x D x H) Unit/Gross AN19LS 17.3 x 17.9 x 18.1 Inches (440 x 454 x 460 mm) / 22.3 x 22.8 x 21.3 Inches (566x 580 x 540 mm) AN19LT 17.3 x 17.9 x 17.9 Inches (440 x 454 x 455 mm) / 22.3 x 22.4 x 21.3 Inches (566x 570 x 540 mm) AN19JS 17.3 x 18.1 x 18.1 Inches (440 x 460 x 460 mm) / 22.0 x 25.0 x 21.3 Inches (560x 635 x 540 mm)
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CONFIDENTIAL 2 Product Specifications 2-2 Pin Assignments Sync Type Macintosh Separate Pin No. GND-R Green Blue H/V Sync. Sense 0 GND (DDC) Green GND-R GND-G GND-G Sense 1 GND-B Reserved Blue GND-Sync./Self-raster Sense 2 DDC Data V-Sync. H-Sync. GND-B V-Sync. DDC Clock H-Sync.
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CONFIDENTIAL 2 Product Specifications 2-3 Timing Chart This section of the service manual describes the timing that the computer industry recognizes as standard for computer-generated video signals. Table 2-1 Timing Chart Mode VESA VGA2/70 Hz VGA3/60 Hz 640/85 Hz 640/75 Hz 1280/75 Hz 800/85 Hz 1024/75 Hz...
CONFIDENTIAL 3 Disassembly and Reassembly This section of the service manual describes the disassembly and reassembly procedures for the AN19L*/AN19J* monitor. WARNING: This monitor contains electrostatically sensitive devices. Use with caution when handling these components. 3-1 Disassembly Cautions:1. Disconnect the monitor from the power source before disassembly. 2.
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CONFIDENTIAL 3 Disassembly and Reassembly 6. Remove the Shield.(TCO 95) 3-1-4 Removing the Main PCB 1. Complete all previous steps. 2. Disconnect the Degaussing Coil at CN603 on the Main PCB. 3. Disconnect all easily accessible ground wires on the PCB and Bottom Chassis. 4.
CONFIDENTIAL 4 Alignment and Adjustments This section of the service manual explains how to make permanent adjustments to the monitor. Directions are given for adjustments using the monitor Interface Board Ver. 2.0 and software (Softjig). 4-1 Adjustment Conditions Caution: Changes made without the Softjig are saved only to the user mode settings. As such, the settings are not permanently stored and may be inadvertently deleted by the user.
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CONFIDENTIAL 4 Alignment and Adjustments 4-2 Display Control Adjustments 4-2-1 HIGH VOLTAGE 4-2-4 Centering Centering means to position the center point of Signal: 1024 x 768 (68 kHz/85 Hz) the display in the middle of the display area. Display image: Don’t care Horizontal size and position and vertical size and Contrast: Minimum...
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CONFIDENTIAL 4 Alignment and Adjustments 4-2-4 (c) HORIZONTAL POSITION ADJUSTMENT 4-2-5 (a) HORIZONTAL LINEARITY ADJUSTMENT CONDITIONS CONDITIONS Scanning frequency: 68 kHz/85 Hz Scanning frequency: 68 kHz/85 Hz Display image: Crosshatch pattern Display image: Crosshatch pattern Brightness: Maximum Use control bar after selecting “H-POSITION” in Contrast: Maximum left menu to center the horizontal image on the...
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CONFIDENTIAL 4 Alignment and Adjustments 4-2-6 Trapezoid Adjustment 4-2-9 Side Pincushion Adjustment CONDITIONS CONDITIONS Scanning frequency: 68 kHz/85 Hz Scanning frequency: 68 kHz/85 Hz Display image: Crosshatch pattern Display image: Crosshatch pattern Brightness: Maximum Contrast: Maximum Use control bar after selecting “PINCUSHION” in left menu to straighten the sides of the image area.
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2. Adjust the luminance of the back raster to adjust the luminance to between 0.5 to 0.7 ft-L using control bar after 65ft -L (± 5ft-L) : AN19LS/AN19JS selecting “GREEN CUTOFF” in the menu. 3. Select “@0: BM OFF” in right menu.
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CONFIDENTIAL 4 Alignment and Adjustments 4-3-2 (d) ABL ADJUSTMENT 4. Select “@7: 5-ft “ in right menu. 5. Check whether the white coordinates of the CONDITIONS video meet the above coordinates spec. Scanning frequency: 68 kHz/85 Hz 6. Select “@8: 24-ft “ in right menu. Display image: Full white pattern Brightness:...
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CONFIDENTIAL 4 Alignment and Adjustments 4-3-4 Focus Adjustment CONDITIONS Scanning frequency: 68 kHz/85 Hz (1024 x 768) Display image: “H” character pattern Brightness: Cut off point Contrast: Maximum PROCEDURE 1. Adjust the Focus VR on the FBT to display the sharpest image possible.
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CONFIDENTIAL 4 Alignment and Adjustments Memo AN19L*/AN19J*...
CONFIDENTIAL 5 Troubleshooting 5-1 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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CONFIDENTIAL 5 Troubleshooting 5-1-2 DPMS Failure WAVEFORMS Check signal source H/V sync. video level. 100 V (IC601, #1) Make No H/V sync. (power off mode) CH1 P-P = 100 V CH1 RMS = 325.8 V LED blinks? Check IC201 Pin 40. +12 V line off? Check IC201 Pin 5.
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CONFIDENTIAL 5 Troubleshooting 5-1-3 H_Deflection Failure Does PWM output signal appear Does DC 12V appear at Check 12 V line. at Pin 1 (H_out) of IC401? Pin 29 of IC401? WAVEFORMS Check IC401. 2.00 V (IC401, #1) Does Horizontal pulse signal Check IC401.
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CONFIDENTIAL 5 Troubleshooting 5-1-5 Invariable H_Size IC401 Pin 24 voltage varies with Check and replace IC401. different EW_Out DAC values? Q402 Gate output duty varies with Check some parts around different BPOUT valus? Q402 and IC401 Pin 24, 26, 28. 5-1-6 Abnormal H_Size IC401 Pin 24 output duty WAVEFORMS...
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CONFIDENTIAL 5 Troubleshooting 5-1-7 Side Pin or Trap Failure WAVEFORMS IC401 Pin 24 output exists? Check and replace IC401. 1.00 V (IC401, #24) Refer to 5-1-6 Abnormal H_Size . CH1 P-P = 1.00V CH1 RMS = 3.008 V 5-1-8 Para. or Pin Balance Failure IC401 Pin 24 output varies with Refer to 5-1-6 Abnormal H_Size .
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CONFIDENTIAL 5 Troubleshooting 5-1-10 V Deflection Failure WAVEFORMS 13 V, –10 V line is on? Refer to 5-1-1 No Power Supply 500 V (IC401, #2) IC401 Pin 2 output exists? Check and replace IC401. CH1 P-P = 500 V CH1 RMS = 1.425 V Check and replace components IC301 Pin 6 output exists? around IC301.
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CONFIDENTIAL 5 Troubleshooting 5-1-12 High Voltage Failure WAVEFORMS Check and replace IC401 Pin 28 BPOUT pulse exists? IC401 and +12 V line. 2.00 V (IC401, #28) Q402 Gate driving pulse exists? Check and replace Q401, Q423. CH1 P-P = 2.00V CH1 RMS = 5.868V Check and replace Q403, Q402 Drain pulse exists?
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CONFIDENTIAL 5 Troubleshooting 5-1-14 No Video WAVEFORMS Check signal cable and connection. 1.00 V (IC102,#5, 8, 10) IC102 Pin 5, 8 and 10 Check the signal cable connection. inputs are right? IC102 Pin 23, 26 and 28 Check I C bus and +12 V line. outputs are right? 1.00 V (IC102, #23,26,28) IC105 Pin 6, 7 and 9...
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CONFIDENTIAL 5 Troubleshooting 5-1-15 No Highlight Zone (AN19JS/AN19LS) WAVEFORMS 1.00 V (IC101, #18, 20, 22) IC101 Pin 2, 4 and 6 inputs are right? IC101 Pin 18, 20 and 22 Check +5V IC101 pin 1, 11. outputs are right? 1.00 V (IC101, #14)
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CONFIDENTIAL 5 Troubleshooting 5-1-17 OSD Failure WAVEFORMS IC103 Pin 5, 24 input is 5V? Check +5V Line. 1.00 V (IC103, #5, 24) Check IC103 Pin 7, 8 I Check I C wavefroms. Data / Clock Line? CH1 P-P = 1.00V CH1 RMS = 4.516V IC103 Pin 6 and 17 Check H-FLB 2, V_BLK.
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CONFIDENTIAL 5 Troubleshooting 5-1-18 User Control Failure Does the DC level change at Pin 36, 37 of IC201 when you Check the of key function button . push the S/W button? Check IC201, CN203. 5-1-19 Degaussing Failure Check degaussing connector CN603. RL601 operation is right? Check D-coil and TH601.
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CONFIDENTIAL 5 Troubleshooting 5-2 General Troubleshooting 5-2-1 No Picture LED blinks? Refer to 5-2-2 Shut down. LED is green color? Check Micom. Check G2 voltage, high voltage and R, G, B cathode voltage. 5-2-2 Shut Down Blinking LED’s? Check power supply. Check horizontal, vertical deflection Scan failure? system and check power...
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CONFIDENTIAL 5 Troubleshooting 5-2-3 Missing Color WAVEFORMS 10.0 V (R,G,B, Video) Proper Video levels are Check signal generator. on CN101 (D-Sub) Pin 1, 3 and 5? Proper Video signal Refer to 5-1-14 No Video. to all cathodes? CH1 P-P = 10.0V CH1 RMS = 17.02V Check IC101 Pin 18, 20 and 22.
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CONFIDENTIAL 5 Troubleshooting 5-2-4 Visible Retrace WAVEFORMS Check white balance adjustment. 5.00V (Q303, Collector) G2 voltage is right? Check D500, D502, Adjust G2. Blank pulse at Pin 17 of IC401? Check IC401. CH1 P-P = 5.00V CH1 RMS = 28.33V 20.00V (CRT Socket, G1) V_FLB pulse at Check Blank pulse at...
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CONFIDENTIAL 5 Troubleshooting 5-2-5 Unsynchronized Image Check input signals Pin 2 and 3 of CN202. Signals are 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.
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CONFIDENTIAL 5 Troubleshooting 5-2-6 Misconvergence Adjust convergence. Convergence is Done now within spec.? Readjust convergence. Convergence is Done now within spec.? Change CRT and readjust convergence. Done 5-16 AN19L*/AN19J*...
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CONFIDENTIAL 5 Troubleshooting 5-2-7 Poor Focus Adjust focus VR of FBT. Align monitor and check for focus Improved focus? change. Check focus leads from FBT to CRT Socket. Check CRT Socket. Replace the CRT and verify focus. 5-2-8 Purity Failure Degause Purity is correct? Done...