Hitachi CM801U Service Manual - Page 3

CONTROLS Front Cover CRT Surface Control Panel FRONT VIEW Power Switch Tilt & Swivel Base 14.141NE V.HMV I O fm\eSJ(dui d \121 IL NAN 4 N. 'IC__ II I! Select Switch Adjust Switch 'STORE" 'ADJUSTMENT* "DEGAUSSING" 'POWER ON/OFF' Rear Panel AC Inlet Serial Communication Terminal REAR VIEW 13W3 Type D-Sub Connector Terminal or D-Sub Mini 15-pin Connector Terminal -4- SIGNAL TIMING CHART Signal VGA 640 X 480 1 Video 2 Sync. Type Voltage Set up Type R/G/B Analog 0.7 Vp-p None H/V Separate VESA 800 X 600 (85Hz) R/G/B Analog 0.7 Vp-p None H/V Separate VESA 1024 X 768 (85Hz) R/G/B Analog 0.7 Vp-p None HIV Separate Macintosh II Two-Page 1152X870 R/G/B Analog 0.7 Vp-p None H/V Separate Amp. TTL Level (Nega.) TTL Level (Posi.) -71. Level (Posi.) TTL Level (Nega.) 3 Video frequency 25.175 MHz 56.250 MHz 94.500 MHz 100.000 MHz 4 Character (Letter) 640 dots X 480 lines 800 dots X 600 lines 1024dots X 768Iines 1152 dots X 870 lines 5 Horizontal Frequency 31.469 kHz 53.674 kHz 68.677 kHz 68.681 kHz Front porch Sync. width Back porch B1avt'-Z1 pi 0.636 ps ( 16cl) 0.569 ps ( 32c1) 0.508 ps ( 48c1) 0.320 ps ( 32c1) 3.813 ps ( 96c1) 1.138 ps ( 64c1) 1.016 ps ( 96c1) 1.280 ps ( 128c1) 1.907 ps ( 48c1) 2.702 ps ( 152c1) 2.201 ps ( 208c1) 1.440 ps ( 144c1) 6.356 ps ( 160cl) 4.409 ps ( 248c1) 3.725 ps ( 352c1) 3.040 ps ( 304c1) 6 Vertical Display time 25.422 ps ( 640c1) 14.222 ps ( 800c1) 10.836 ps (1024d) 11.520 ps (1152c1) H.period (1H) 31.778 ps ( 800c1) 18.631 ps (1048c1) 14.561 ps (1376c1) 14.560 ps (1456c1) Frequency 59.940 Hz 85.062 Hz 85.000 Hz 75.060 Hz Front Porch Sync width Back porch Blanking width Display time V.period (1V) 0.320 ms ( 10H) 0.019 ms ( 1H) 0.015 ms ( 1H) 0.044 ms ( 3H) 0.064 ms ( 2H) 0.056 ms ( 3H) 0.044 ms ( 3H) 0.044 ms ( 3H) 1.047 ms ( 33H) 0.503 ms ( 27H) 0.524 ms ( 36H) 0.568 ms ( 39H) 1.431 ms ( 45H) 0.578 ms ( 31H) 0.582 ms ( 40H) 0.655 ms ( 45H) 15.253 ms ( 480H) 11.179 ms ( 600H) 11.183 ms (768H) 12.667 ms ( 870H) 16.683 ms ( 525H) 11.756 ms ( 631H) 11.765 ms ( 808H) 13.322 ms ( 915H) 7 Scan System 8 Remark (Non-interlaced) (Non-interlaced) (Non-interlaced) (Non-interlaced) Only CM801* & CM802* 9 Signal name 30C 54A 68A 70A * VGA is a registered trademark of Internat'onal Business Machines Corporation. * VESA is a trademark of a nonprofit organization, Video Electronics Standard Association. * Macintosh II is a trademark of Apple Computer, Inc.. -5-