“anti-static” brushing clothes together, or lifting your foot from can generate electrical charges sufficient to damage a carpeted floor can generate enough static ESDs. electricity to damage an ESD. Indicates ESDs on the Schematic Diagram in this manual. PN22N*...
10 % to 80 % Storage Temperature -4°F to 113°F (-20°C to 45°C) Humidity : 5 % to 95 % • PN22N* complies with TCO 99 recommendations for reduced electromagnetic fields. • Designs and specifications are subject to change without prior notice. PN22N*...
Reserved Reserved GND-Sync./Self-raster Sense 2 GND-Sync./Self-raster GND-Sync./Self-raster DDC Data V-Sync. DDC Data DDC Data H-Sync. GND-B H-Sync. Not Used V-Sync. Not Used Not Used DDC Clock H-Sync. DDC Clock DDC Clock Figure 2-1. Male Type Figure 2-2. Male Type PN22N*...
B : Horizontal sync width O : Frame time total P : Vertical sync width C : Back porch D : Active time Q : Back porch R : Active time E : Front porch S : Front porch PN22N*...
3 Disassembly and Reassembly This section of the service manual describes the disassembly and reassembly procedures for the PN22N* monitors. WARNING: This monitor contains electrostatically sensitive devices. Use caution when handling these components. 3-1 Disassembly Cautions:1. Disconnect the monitor from the power source before disassembly.
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V_DY and anode cap on the Main PCB Assembly. 4. Remove 5 screws on the Main PCB. 3-1-8 Removing the Bracket Remove the 10 screws on the Front Cabinet. 3-2 Reassembly Reassembly procedures are in the reverse order of Disassembly procedures. PN22N*...
91 kHz/85 Hz. 4-1-1 (c) WARM-UP TIME The monitor must be on for 30 minutes before starting alignment. Warm-up time is especially PN22N* MITSUBISHI critical in color temperature and white balance adjustments. 700V 4-1-1 (d) SIGNAL Analog, 0.7 Vp-p positive at 75 ohm, internal...
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5. Signal generator, or Computer with a video board that uses the ET-4000 chipset (strongly recommended if using Samsung DM 200 software) and that displays: 1280 x 1024 @ 85 Hz, or 1600 x 1200 Figure 4-1. Setup 1, With Signal Generator @ 85 Hz (maximum).
292.5 mm. (Tolerance: ± 3 mm.) 4-2-1 (c) HORIZONTAL POSITION ADJUSTMENT CONDITIONS Scanning frequency: 91 kHz/85 Hz Display image: Crosshatch pattern Brightness: Cut-off Contrast: Maximum Click on the << or >> box next to H_POSI to center the horizontal image on the raster. PN22N*...
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Crosshatch pattern 10 Seconds . Brightness: Cut-off Contrast: Maximum 4-2-10 Save the Data Click on the << or >> box next to PARALL to To save the adjustment data for a mode, press make the image are rectangular. FACTORY SAVE. PN22N*...
<< or >> box next to G_CUT to decrease 3. Select COLOR FACTORY SAVE to save the or increase the green cutoff (bias) and data. repeat procedures 2 and 3. PN22N*...
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B_GAIN to make the video white. to the procedure on page 4-5. (For 5000K color adjustment: x = 0.346 ± 0.02, y = 0.359 ± 0.02.) 2. Refer to the procedure for 9300K, section 4-3-2 (c) steps 2 and 3. PN22N*...
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4-3-7 Color Purity Adjustment Color purity is the absence of undesired color. Conspicuous mislanding (unexpected color in a uniform field) within the display area shall not be visible at a distance of 50 cm from the CRT surface. PN22N*...
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4 Alignment and Adjustments Memo PN22N*...
Check signal source H/V sync video level. Make No H/V sync (power off mode) LED toggle green color, blinks? Check IC201 Pin 30 and 31. IC201 Pin9 High? Check IC201 Pin 9. Heater voltage is off? Check IC201 Pin 10. Done PN22N*...
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Check DY connector connection. CH1 RMS = 188.4 V Q404 Gate ICS202 Pin 26 Check some parts around ICS202. waveform is right? CH1 RMS = 7.67 V Check some parts around Q405 Collector QS202 and QS203. CH1 RMS =353.2 V PN22N*...
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IC403 Pin 7 and 8 voltage varies Check +12 V line. with different H_Lin. DAC values? Check some parts around IC403. Check L403. 5-1-6 Invariable H_Size ICS201 Pin 20 voltage varies with Check and replace ICS201. different H_Size DAC values? PN22N*...
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ICS201 Pin 20 CH1 RMS = 11.52 V 5-1-8 Side Pin or Trap Failure ICS202 Pin 24 output exists? Check and replace ICS202. 5-1-9 Para. or Pin Balance Failure ICS202 Pin 24 output varies with different DAC values? Replace ICS202. PN22N*...
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Check and replace ICS202. CH1 RMS =3.668 V IC301 #6 IC301 Pin 1 input exists? Check R300 and R304. CH1 RMS = 8.72 V Check and replace some parts IC301 Pin 6 output exists? around IC301. Check V DY connector connection. PN22N*...
IC301 check bias voltage. different DAC values?. CH1 RMS =3.668 V Done 5-1-13 High Voltage Failure Q524 Drain Check +12 V line. Q524 Drain driving pulse exist? Check and replace Q522, Q523, Q524, and IC501. Done CH1 RMS = 207.2 V PN22N*...
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IC503 #3 Some parts around Q551, Q552, Q553, Q554, and Replace failed part. IC503 are right? CH1 RMS = 1.770V Some parts around T502 are right? Replace failed part. Check the connection between FBT Pin 13 and CRT Socket PCB. PN22N*...
CH1 RMS = 1.969 V IC102, #2, 6, 11 Check +80 V line. Cathode DC levels are right? Check and replace IC150. Check G2 wire, G2 voltage is right? CH1 RMS = 2.896 V CRT Socket board and FBT. Change CRT. Done. PN22N*...
Replace IC201. Done 5-1-18 Sub-Micom Failure WAVEFORMS +5VS line is right? Check ICS204. ICS201, #14 ICS201 Pin 14 is right? Check X201, CS205 and CS206. CH1 RMS = 2.904 V All in/optput values are right? Replace ICS201. Done 5-10 PN22N*...
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CH1 RMS = 4.28V IC102 #20 (=IC103 #7) IC103 Pin 20, 21 and 22 outputs Check and replace IC103. are right? CH1 RMS = 3.664 V Check and replace IC101. IC102 #21 (=IC103 #8) Done CH1 RMS =4.064V PN22N* 5-11...
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5-1-21 Degaussing Failure Check degaussing connector. Check and replace IC201. IC201 Pin 40 output is right? Check user function key. Check +13V_3 line Q630 base input is right? and replace Q630. RL601 operation is right? Check D-coil and TH602. Done 5-12 PN22N*...
5-2-2 Shut Down Blinking LED’s? Check power supply. Check horizontal, vertical deflection Scan failure? system and check power supply secondary voltages. High voltage failure? Check high voltage system. Video failure? Check Video board. Check and replace IC201 and ICS201. Done PN22N* 5-13...
CH1 RMS = 77.68 V Check IC151 Pin 10, 11 and 12. Proper DC voltage is Check QR40,QR41, QG40, QG41 on all cathodes? QB40, and QB41. Check G2 wire, G2 voltage(700V) is right? G2 control, volume, and FBT. Change the CRT. Done 5-14 PN22N*...
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Check G2 control volume and FBT. Blank pulse is on Check Q301. Q301 collector? Pulse is on emitter of Q301? Check Q101 and related components. G1 voltage is right? Check C159 and R154. IC150 output voltage is right? Check IC150. Done PN22N* 5-15...
D-SUB connector. Sync. is right? Check Signal cable. Signals at Pin 29, 30 and 5 of Replace IC201. IC201 are right? ICS202 Pin 1 and 2 input are right? Check wire dressing and connections. Check ICS202 Pin12. Done 5-16 PN22N*...
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5 Troubleshooting 5-2-6 Misconvergence Try readjusting convergence. The convergence is now Done within spec.? Readjust convergence. The convergence is now Done within spec.? Change CRT and readjust convergence. Done PN22N* 5-17...