File name p08_p15.pdf8 105E CM23 GSIII Electrical Instructions
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0. General: 2. EHT voltage (3540)
When carrying out the electrical setting, in many cases a video - Connect a dc voltmeter between capacitor 2643 joint and ground.
signal must be applied to the monitor. A computer with : - Apply a video signal in the 640 x 480 with 31.5 kHz/60 Hz mode.
- Select the "crosshatch" pattern. Adjust trimming pot-meter 3540
- "ATI VGA1024" interface card until the DC voltmeter reads : 66.5 +/- 0.2V (for PHILIPS CRT),
- PGA1024 (4822 212 30916) But 66.5V for CPT CRT
- PGA1280 (4822 212 30917)
3. Monitor the following auxiliary voltages
are used as the video signal source. The signal pattern are selected
from the "service test software" package. see user guide 4822 727 +12V source across C2158 +12.7V +/- 0.5 VDC
19896 (ATI 1024), or 4822 727 20273 (PGA 1280). - 12V source across C2162 - 12.7V +/- 0.5 VDC
+8V source across C2172 +8.0V +/- 0.4 VDC
+6V source across C2164 +6.2V +/- 0.3 VDC
0.1 Factory preset timing mode -178V source across C2647 -178V +/- 8.0 VDC
+180V source across C2153 +183V +/- 1.5 VDC
- Installation instruction for the ATI card: +5V source across C2168 +5.0V +/- 0.25VDC
- Place the ATI interface card into the computer. +80V source across C2156 +81.0 V +/- 0.5 VDC
- Select the "vsetup" file from the utility disk belonging to the card.
- Select "8 bits" or "16 bits" rom operation depending on your 4. General conditions for alignment
computer type.
- Select "analog monitor". 4.1 During all alignments, supply a distortion free AC mains voltage
- Select the monitor type from video ROM BIOS. to set via an isolating transformer with low internal impedance.
- Select "MAGNAVOX CM5000" for the resolutions: 4.2 Align in pre-warmed condition, at least 30 minutes warm-up with
Reolution H.freq./V.freq. H. V. nominal picture brightness.
640 x 480 31.5 kHz/70 Hz - + 4.3 Purity, geometry and subsequent alignments should be carried
640 x 480 31.5 kHz/60 Hz - - |