Service Manuals, User Guides, Schematic Diagrams or docs for : COMPAQ Monitor COMPAQ P900 sm[1].part2

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COMPAQ P900 sm[1].part2


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SERVICE MANUAL                                                                                          P900
                                                                                                                    P900

                                                                              US                          Model
                                                                        Canadian                          Model
                                                                             AEP                          Model
                                                                            AUS                           Model
                                                                           Japan                          Model
                                                                   N. Hemisphere                          Model
                                                                              UK                          Model
                                                                                         Chassis No. SCC-L30M-A




                                                                                F99 CHASSIS
                                                SPECIFICATIONS

Picture tube       0.24 mm (center) -0.25mm (edge)       Power Consumption
                   aperture grill pitch                         Maximum                 140 W, 478 BTU/h
                   19 inches measured diagonally                Nominal                 100 W, 341BTU/h
                   90-degree deflection
                                                         Deflection frequency           Horizontal: 30 to 107 KHz (automatic)
Video image area   (17.99" maximum viewing image)                                       Vertical: 48 to120 Hz (automatic)
                   Approx. 365 X 274 mm (w/h)
                   (143/8 x 104/5 inches)                AC input voltage/current       100 to 120 V, 50/60 Hz,
                                                                                        1.8A (RMS) at 100VAC
Resolution         Horizontal: Max. 1920 dots
                   Vertical: Max. 1440 lines                                            220 to 240V, 50/60Hz,
                                                                                        1.0A (RMS) at 240 VAC
Standard image     Approx. 352 x 264 mm (w/h)
area               (137/8 x 102/5 inches)                Dimensions                     449 x 475 x 462 mm (w/h/d)
                                                                                        (172/3 x 187/10 x 181/5 inches)

Input signal       Analog RGB (75 ohms typical)          Mass                           Approx. 26.0 kg (57 lb 5 oz)
         Video     0.7 Vp-p, Positive
                   Separate Horizontal and Vertical
        Sync       TTL level, Positive or Negative
                   Video Composite (Sync on Green)
                   0.3 Vp-p                               Design and specifications are subject to change without notice.



                                                                                COLOR MONITOR
P900

                                      POWER MANAGEMENT MODES

   If you have VESA's DPMS compliance display card or software installed in your PC, the monitor can automatically reduce
   its power consumption when not in use. If input from keyboard, mouse, or other input devices is detected, the monitor
   will automatically "wake up." The following table shows the power consumption and signaling of this automatic power
   saving feature.




                                       SELF DIAGNOSTIC FUNCTION

   When a failure occurs, the STANDBY/TIMER lamp will flash a set number of times to indicate the possible cause of the
   problem. If there is more than one error, the lamp will identify the first of the problem areas.




                                           TIMING SPECIFICATIONS




                                                         --2--
                                                                                                                          P900

                                              SAFETY CHECK-OUT

After correcting the original service problem, perform         LEAKAGE TEST
the following safety checks before releasing the set to        The AC leakage from any exposed metal part to earth ground
the customer:                                                  and from all exposed metal parts to any exposed metal part
1. Check the area of your repair for unsoldered or poorly-     having a return to chassis, must not exceed 0.5 mA (500
   soldered connections. Check the entire board surface        microampere). Leakage current can be measured by any one
   for solder splashes and bridges.                            of three methods.
2. Check the interboard wiring to ensure that no wires         1. A commercial leakage tester, such as the Simpson 229 or
   are "pinched" or contact high-wattage resistors.               RCA WT-540A. Follow the manufacturers' instructions to
3. Check that all control knobs, shields, covers, ground          use these instructions.
   straps, and mounting hardware have been replaced.           2. A battery-operated AC milliammeter. The Data Precision
   Be absolutely certain that you have replaced all the           245 digital multimeter is suitable for this job.
   insulators.                                                 3. Measuring the voltage drop across a resistor by means of
4. Look for unauthorized replacement parts, particularly          a VOM or battery-operated AC voltmeter. The "limit"
   transistors, that were installed during a previous             indication is 0.75 V, so analog meters must have an
   repair. Point them out to the customer and                     accurate low voltage scale. The Simpson's 250 and Sanwa
   recommend their replacement.                                   SH-63TRD are examples of passive VOMs that are
5. Look for parts which, though functioning, show                 suitable. Nearly all battery operated digital multimeters
   obvious signs of deterioration. Point them out to the          that have a 2V AC range are suitable. (See Figure A)
   customer and recommend their replacement.
6. Check the line cords for cracks and abrasion.                                  To Exposed Metal
                                                                                  Parts on Set
   Recommend the replacement of any such line cord
   to the customer.
7. Check the B+ and HV to see if they are specified
   values. Make sure your instruments are accurate; be
   suspicious of your HV meter if sets always have low                                                      AC
                                                                     0.15 



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