HP 98770 CE Handbook Download

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Summary of Contents for 98770 CE

Page 1: ...HP 9800 Computers 98770 CE Handbook Part No 98770 90039 E1083 Requires Binder No 9282 0683 Flin HEWLETT PACKARD Printed in J SA Second Edition October 1983 ...

Page 2: ...d to another language without the prior wri1ten consent of Hewle1t Packard Company The information contained in this document is subject to change without notice Restricted Rights Legend Use duplication or disclosure by the Government is subject to restrictions as set forth in paragraph b 3 B of the Rights in Technical Data and Software clause in DAR 7 104 9 a Hewlett Packard Company 3404 East Har...

Page 3: ...stdlldtlOII 1 1 hdpl 1 Q 77 IH11Jq11ldlH1l1 h 1 r I S770 1 1I1Jl l H tlll IIdpl 1 1 q ffl I H Tl hil lt f h 8770 dJlI tlll llh h 1 17 1 6770 i l lIph r lb Chdplel S l S770 Hepldl PIII 111 Prlft hrlptPI 9 98770 Dld lfdm Chdptl f 10 IJI 770 Hl tefPIH P In 1 11 98770 Wn I P Notl ...

Page 4: ...the USA and Canada this warranty applies for ninety 90 days from the date of delivery Hewlett Packard will at its option repair or replace equipment which proves to be defective during the warranty period This warranty includes labor parts and surface travel costs If any Equipment returned to Hewlett Packard for repair must be shipped freight prepaid Repairs necessitated by misuse of the equipment...

Page 5: ...ption Display Features Cathode Ray Tube Scan Refresh Rate Vertical Scan Rate Vertical Retrace Time Horizontal Scan Rate Horizontal Retrace Time Dot Scan Rate 5 C to 40 C ambient 40 C to 65 C 80 32 cm 46cm 45cm 29 45 kg 65 lbs 110 volts ac 88 to 127 Vac 220 volts ac 198 to 250 Vac 48 to 66 Hz inclusive 500 watts maximum typical 14 inch diagonal delta gun black matrix Non interlaced raster scan 60 H...

Page 6: ...en blue cyan magenta yellow Full screen and small crosshair blinking underline Dots are spaced 343 mm center to center Approximately 10 000 inches per second Modifications for 9000 Series 500 Model 20 The 98770A display unit is used with the 9000 computers and must be modified by the addition of a printed circuit board This board is installed inside its own housing that is attached to the undersid...

Page 7: ...uropean 9845C 840 Katakana Also 98771A standard Also 98771A 772 Related Documentation 98770 90032 Service Manual 09845 92051 Color Graphics Programming Manual 09845 93005 Installation Operating and Test Manual 98770 90039 CE Handbook Section Product Support Package 98770 66527 Test Fixture 98770 90031 Service Manual 09845 91031 Test Cartridge TBIN 09845 92041 System Exerciser Cartridge B C 09845 9...

Page 8: ...1 4 98770 Product Information ...

Page 9: ...O POWER SWITCH IT IS SWITCHED ON VIA A RELAY WHICH IS ACTIVATED WHEN THE 9845C MAIN FRAME IS SWITCHED ON ALWAYS SWITCH THE 9845C POW ER SWITCH TO THE OFF POSITION BEFORE CONNECTING THE 98770A POWER CORD Before applying power to the computer check the following items 98770A is properly installed Voltage selector switches set properly on both display and mainframe Proper fuse installed in both displ...

Page 10: ...ase parts and tube face occasionally with mild soap and water or alcohol Do not use harsh abraSive or other general purpose cleaners Use care to assure that no liquid gets inside of case A6 Test Switch Figure 2 1 98770A Back Panel AC Power Connector Voltage Selector Switches ...

Page 11: ...ts Interfacing The 98770A interfaces to the 9845C base via the Alpha Control Assembly 98770 66534 and the Graphics Interface Assembly 09845 66504 Alpha information is stored in block 0 read write memory and is refreshed to the display via the IDA bus Graphics information is transfer red via the I O bus to the display where it is interpreted and entered into the display memory Status Word The Statu...

Page 12: ...3 2 98770 Configuration ...

Page 13: ...s Proceed to Raster Checks No Proceed with nitial Checks Correct any fault Proceed to Inoperative Unit Checks Inoperative Unit Problem Chart Remove top cover Symptom Fuse keeps blowing Neither back panel fan runs Fan above voltage selector switches doesn t run Probable Cause Fault in Power Supply Rear Panel Assembly Transformer Spark Gap Fault in Rear Panel Assy Turn On Relay Transformer Fuse loca...

Page 14: ...A6 80V overvoltage A44 AS A6 High Voltage lSV or 2SV overvoltage AS A44 A3 A2 A6 12V overvoltage A44 AS AS Heat Sink over temperature AS defective fan blocked air inlet Switching transformer primary overcurrent S 2V overvoltage AS A6 A32 A13 A33 AS3 AS4 Light Pen A2 SV overvoltage A32 A11 A13 A33 AS3 AS4 A6 A2 Linear 2 Switching Regulator inhibited AS Power Supply Linear 1 Switching Regulator inhi...

Page 15: ...p If lit brite power supply is functional Skip to Step 2 2 If off dark Power supply is not powered or inoperative Replace power supply and AS assembly and do this section again see AS and power supply procedure See Page 4 S Check Which LED s Are Lit The following list is for Left indicator group of LED s unless otherwise stated LED 1 Lit SO Volt supply overcurrent 1 Unplug power cord 2 Disconnect ...

Page 16: ...ove AS and try to rotate fan by hand a If frozen will not rotate replace fan b If it spins disconnect the fan and check the voltage at the connector 2S Vdc Check the wiring to fan See Page 9 3 9 4 9 S 4 Do AS and power supply procedure See Page 4 8 S Plug in and turn ON If LED S still lit go to minimum configuration tests LED 6 Lit Switching transformer primary overcurrent 1 Unplug power cord 2 Re...

Page 17: ...06 2 The All board 98770 66511 3 The A32 board 98770 66532 4 The A33 board 98770 66533 13 53 54 5 The 98775 66501166504 board if present 6 Three 503 boards 98770 66503 Note the order of removal to avoid reconvergence 7 The 502 board 98770 66502 8 Remove the CRT assembly be careful to disconnect YOKE wiring under the CRT Preliminary Procedure Plug unit into power source and listen to wake up sounds...

Page 18: ...r HV crackle b Fail If any LED lit except 4 replace high voltage assembly c Test run repeat Step 3 4 Install the A6 assembly Install all mounting screws a Pass Power supply up display visible but no horizontal sync Retrace lines visible convergence close but colors separated no alpha no graphics 4 LED lit other LED s dark b Fail Replace A6 assembly c Test run repeat Step 4 5 Connect Video cable fr...

Page 19: ...pply up No change in display b Fail Replace the 511 board c Test run repeat Step 9 10 Install the A32 board a Pass Power supply up No change in display b Fail Replace the A32 board c Test run repeat Step 10 11 Install the 98775 66501 board if present a Pass Power supply up No change in display b Fail Replace the 98775 66501 board c Test run repeat Step 11 12 Connect the video cable Assure that the...

Page 20: ...not the problem Turn OFF unplug and reinstall original AS and power supply Check out the primary wiring and the mother board assembly Return to Inoperative Unit procedure or Minimum Configuration procedure If unit does function do the following steps 1 Remove new supply and reinstall original supply leaving new AS installed Plug in and turn ON a If unit operates AS is the problem Leave new AS in u...

Page 21: ...oltage A44 AS Power Supply Yoke Assembly A44 AS A44 AS A44 AS Cable not connected A6 A13 A33 AS3 AS4 9877S 66S01 66S04 A6 A13 A33 AS3 AS4 CRT A2 A2 AS A3 A2 AS A3 AS A6 Cable to A6 disconnected A6 A13 A33 AS3 AS4 9877S 66S01 66S04 Graphics Problem Chart Symptom Incorrect lines being drawn Extra or missing lines Improper or no area fill Improper line type or no line type control Random or repetitiv...

Page 22: ...ers missing character in lines or incor rect Incorrect colors or highlighting One or more cursors missing or incorrect No alpha blanking No graphics blanking Cause A13 A33 A53 A54 A34 A13 A33 A53 A54 All A32 98775 6650I 66504 A13 A33 A53 A54 A34 A13 A33 A53 A54 A34 A13 A33 A53 A54 A34 A13 A33 A53 A54 A13 A33 A53 A54 A13 A33 A53 A54 ...

Page 23: ... adjustment pattern Convergence alignment pattern Character set with highlighting features and color Optional character set with highlighting and color Color and highlighting in various combinations Alpha on and off test Graphics Tests Key ITJ eJiD CTI CD OU OU CIJ CD CD G J Other Tests Key Test Full graphics raster in different colors one color per key Graphics memory test Displays the three grap...

Page 24: ... Check the characters to ensure they are clear and readable If necessary remove the display s top cover and adjust the focus control to achieve the best overall character focus refer to Chapter 6 for adjustment procedures It may not be possible to achieve perfect focus in all areas of the display c J Convergence Alignment Pattern Press CJ all thirteen s and the corresponding step number are displa...

Page 25: ...test checks the character ROM and the highlight and color latch on the A13 A33 A53 or A54 assembly CD Optional Character Sets Press CD if an optional character ROM is installed Option 771 or 772 the optional characters are displayed If test fails replace the A13 A33 A53 A54 assembly Note If the optional character ROM is not installed inverse video charac ters will be displayed ...

Page 26: ...of the graphics color keys CJ J through DiD If test fails replace the A13 A33 AS3 AS4 assembly CD Alpha On and Off Test Press CD the alpha display should disappear Press CD again the alpha display should appear again Press CD again to enable next test This test checks the alpha blanking circuit on the A13 A33 AS3 AS4 assembly ...

Page 27: ...n Y Dot Location Memory Number Actual Data Expected Data GRAPHICS X OOOOO Y OOOOO MEM OOOOO HAS 000000 NOT 000000 The 98770A Service Manual shows how to isolate this error message to a single memory chip CTI Graphics Cursors Press CTI initially the small horizontal line cursor appears Press CTI again and the full screen cross hair cursor appears Press CTI once more to view the small cross hair cur...

Page 28: ...ask ensure that the center line is aligned to the center line of the alignment mask Then align the bottom and top lines with those on the mask Refer to Chapter 6 for vertical linearity adjustment procedures Press CL the next pattern is vertical lines for horizontal linearity Press CL the following display appears This display tests the ability of the vector generator to compute and draw vectors Th...

Page 29: ...y shows the 16 area fill patterns and the 8 line types Press o J the display shows three overlapping blocks The three memories are assigned different colors for this section and the next two sections The colors are rotated in the three memories ...

Page 30: ...5 8 98770 Diagnostics Press CD Press CD Press CONTINUE to return to the main program ...

Page 31: ...of the keys on the lower front bezel of the display An X appears above the key that was pressed Must be in Main Menu not Graphics CLJ Light Pen Test Press CLJ a self test is performed on the light pen s position circuits Press CONTINUE position the pen over the cursor and press the pick button ok should appear on the display This tests the ability of the light pen to pick a point Press CONTINUE po...

Page 32: ...5 10 98770 Diagnostics 98458 Test Tape Diagnostics Refer to Installation Operation and Test for the HP 9845 09845 93005 shipped with each unit or to the 98780A CE Handbook chapter ...

Page 33: ...justment Preliminary High Voltage Focus Purity Color Intensity Convergence Prelim Raster Position Raster Size Raster Shape Vertical Linearity Convergence Final Page 0 3 6 3 6 4 6 4 6 5 6 6 6 7 6 7 6 8 6 10 6 6 Where to Start Adjusting Assembly Replaced CRTlYoke High Voltage Unit 98770 66502 98770 66503 98770 66506 98770 66544 Start at and do all subsequent Preliminary Adjustments High Voltage Puri...

Page 34: ...6 2 98770 Adjustments A6 Adjustments Back Fan Focus Adjustment Top and Bottom Pincushion Vertical Centering Top and Bottom Ratio Convergence Adjustments A44 Adjustments Right Side Front A2 Adjustments ...

Page 35: ... throughout the raster 6 Adjust the A44 height width vertical and horizontal centering so all raster edges are at least 1 cm inside the screen edges Touch up the A2 purity controls if necessary for optimum red purity 7 Perform a preliminary color intensity adjustment per the procedure on page 6 5 High Voltage t lW iji DO NOT ATTEMPT TO MEASURE THE CRT ANODE VOLTAGE This adjustment sets the high vo...

Page 36: ...s interactive with the Raster Position adjustment and affects Convergence Procedure 1 Execute DEGAUSS from the keyboard Exit Test Binary first by pressing DiD 2 Set the A13 A33 A53 or A54 switch forward for a red raster 3 Adjust the brightness control and the color intensity control A6 as necessary to produce a medium bright red intensity level 4 Adjust the A44 width height and centering controls ...

Page 37: ... 3 color intensity controls CCW A6 until none of the three rasters are visible Use an insulated tool only If necessary remove the metal shield iuma REMOVING THE METAL SHIELD EXPOSES LETHAL VOLT AGES PRESENT ON THE A6 ASSEMBLY 2 Adjust the green color intensity control clockwise to produce a dim but entirely visible green raster Turn this control 113 turn more CW from this setting 3 Adjust the red ...

Page 38: ...convergence steps a converge the red and green to make yellow b converge the blue to make white c If on Convergence steps 1 6 or 8 refer to procedural step 4 below d press CONTINUE 4 On steps 1 6 and 8 you may have to adjust the blue lateral adjustments A2 If the blue is to either side of the converged use the appropriate blue lateral adjust ment to center the blue horizontally on the converged re...

Page 39: ...r the raster horizontally with the horizontal center control 2 Center the raster vertically with the vertical center control 3 Touch up convergence as necessary see CONVERGENCE page 6 6 4 Check and perform if necessary the raster size raster shape and purity adjustments Raster Size Two adjustments raster width and raster height are used to dimension the raster to the proper size You may have to re...

Page 40: ... make the edges of the raster equal in height J Wrong T 1 Correct 0 0 Left and Right Sides Equal 1 1 Note If the raster appears tilted after this adjustment with the bezel seated evenly remove the bezel assembly loosen the four screws securing the CRT assembly and tilt the CRT assembly as necessary to correct the raster tilt Tighten the four screws securing the CRT assembly reseat the bezel assemb...

Page 41: ...n Wrong Straight Left and Right Edges Correct 4 Adjust the top and bottom pincushion control A44 to straighten the top and bottom edges of the raster Incorrect Top and Bottom Ed Pincushion Wrong Straight Top and Bottom Edges Correct 5 Recheck adjustments made in steps 1 through 4 then recheck the raster size adjustments I to see if they have been effected ...

Page 42: ...r A54 to its center normal position 2 Adjust the vertical center control to align the center line of the display with the center of the CRT found above 3 Refer to drawing 2 and adjust the vertical height and null controls as necessary to position the outside lines of the display Assure that the center line remains at the center of the CRT 4 Adjust the vertical linearity control to obtain near equa...

Page 43: ... 4 1 __ L tl 2 Vertical Centering 9 75Cm 1 19 5cm j 1 3 Horizontal Centering Final Convergence As the previous adjustments may have affected convergence a final convergence adjustment should be made at this time see CONVERGENCE page 6 6 I ...

Page 44: ...6 12 98770 Adjustments ...

Page 45: ...98770 Peripherals 7 1 Chapter 7 Peripherals I ...

Page 46: ...7 2 98770 Peripherals ...

Page 47: ...d to the component level either on site or at the local field office This procedure is recommended only when replaceable components are not soldered in or when the probability of inducing further damage in the course of doing the repair is minimal All components which may be replaced by the CE are listed as level 2 parts under the assembly part number in the parts list Other failures should be rep...

Page 48: ...n male J20 21 1251 3767 Connector 7 pin male J5 1251 4672 Connector 10 pin header J12 1251 4882 Connector 7 pin post type JlO 1251 5153 Connector single contact J6 1251 7623 Connector 10 pin male Al 98770 66501 Motherboard old version A2 98770 66502 Convergence Waveform Assembly A3 98770 66503 Convergence Output Assembly A4 98770 66504 Deflection HV Assy old version See 98770 66544 A5 98770 66505 ...

Page 49: ...98770 69532 1 IG _ 1 0 98770 69533 1 Display Logic Assy Exchange 1 I 5 98770 69554 1 Display Logic Assy Exchange 1 0 98770 69971 1 CHTNoke Assy Exchange 1 1 98770 69980 1 Power Supply Exchange 1 1 98775 66501 0 Ught Pen Control Assy old version See 98775 66504 1 4 98775 66504 1 Ught Pen Control Assy 1 1 98775 67971 1 Ught Pen Assy Exchange part 98775 69971 1 5 98775 69971 1 Ught Pen Assy Exchange ...

Page 50: ...053 016 Blue Lateral Output 015 1853 0059 Convergence Output 2N3791 1853 0059 2N3791 RED 021 019 High Voltage Output Convergence Output 1854 0848 I 1853 0059 2N6584 2N3791 GREEN 026 023 Horizontal Linearity Convergence Output Output 1853 0059 1854 0264 2N3791 BLUE 2N3715 028 029 Vertical Output Horizontal Linearity 1854 0264 Output 2N3715 21V 1853 0059 2N3791 033 Vertical Output 034 1853 0059 Hori...

Page 51: ...Diagrams 9 1 Chapter 9 Diagrams Assemblies Under the Top Cover A5 Removal Screws A3 3 each Convergence Output 98770 66503 A13 A33 A53 A54 Display Logic Assembly A11 Vector Generator 98770 66511 A32 Graphics Memory 98770 66532 Light Pen Control 98775 66504 A2 Convergence Waveform 98770 66502 I ...

Page 52: ... Ground Connector Chassis Assemblies CRT Connector A6 Power Cable DC Internal Fan High Voltage Drive Cable DC Fan Spark Gap Line Filter Power On Relay One Amp Fuse for 15V Internal Eariy units oniy Motherboard Brightness Control Cable to A2 Assembly Start Up Transformer Cable to A24 Assembly on Bezel ...

Page 53: ...SWITCH S1 98 8 Rear of Machine SWITCH S2 See wiring d lagrams that follow Primary W trIng 98770 D lagrams 9 3 I ...

Page 54: ...928 _ u O W H T 4 E G R A OJl 4 5 D E SPARK GAP S2 o S2 958 WHT GRN GRA Jl 7 8 T H J 110 VAC 8 1 G R A oJHO ll l M 918 WHT BRN GRA 98 WHT GRA 958 WHT GRNIGRA 98 WHT GRA RELAY 8 GRA 948 2A 1A WHT YELIGRA o BlK 2 L _ 04 BlK YEl Switch in nov Position ...

Page 55: ...f _9 02 8c J Jr_ _ _ _ _ 9 4 8 ____ oJI 4 5 WHT YEL GRA D E S2 958 Or W cH T G R N G R A OJI 7 8 T I I I SPARK GAP 8 r O 220VAC S2 1 1 H J I 918 WHT BRN GRA C A OJ1 10 II L M 98 WHT GRA 958 WHT GRN GRA 948 WHT YEL GRA Switch in 220V Position I ...

Page 56: ...98770 Diagrams CRT Handling Deflection Yoke Cable Connector Rear Ground Cable Connection Purity and Blue lateral Yoke Connector CRTN oke Cables Convergence Yoke Cable Connector CRT Assembly Storage Position ...

Page 57: ...lation 98770 Diagrams 9 7 Video Cable 8120 2988 Light Pen PC Assembly Installation Original Video Cable A13 to Rear Connector 8120 2988 Video Cable Connections Light Pen Video Cable Forward Connector to A6 8120 3073 I ...

Page 58: ...ly Checks The power supply test points are shown in Figure 3 2 Table 3 2 lists the voltage tolerances for each supply Test Points on Top Cover Power Supply Test Points Right Indicator Group Test Points on Side Left Indicator Group ...

Page 59: ...ilter Capacitor Assembly Filter capacitors for the output voltages of the switching regulators Voltages enter the 98770 motherboard via this assembly 98770 66509 A9 Control Assembly Filament supply rectifiers and filter Regulators for filament 15 INT and 12 supplies Pulse width modulators Frequency response shaping HSYNC synchronizer phase locked loop Voltage current sense LED indicator drivers 98...

Page 60: ...11 5Vln m 15VINT Reclilierand Regula10r 1SVINT Sel Up FllamenlVoUaqe 63Vdc Tran5formf r Fllamenl vOHage TemperalureSensor Inpu From AS RegulatofsOn 5 _m __ _____________ 1 30 1 ...

Page 61: ...ipheral External Bus Grant EBG External Bus Grant PSMC Peripheral Synchronous Memory Complete tOL End of Line RAS Row Address Strobe FB Full Brightness RAV Red Alpha Video FLB Full Lme Buffer RGV Red Graphics Video FLG Flag RNP Reset New Page GAV Green Alpha Video ROW Row Select RV Red Video GGV Green Graphics Video RVD Red Video Data GS Graphics Select GV Green Video SCM Store Color Mask GVD Gree...

Page 62: ... Flat Washer 0624 0347 Screw Flathead Plastite 2d S041 2386 Door 9164 0119 Magnet on rear of door 98770 64401 Base 3a 98780 67977 Locking assembly Right Foot 3b 98780 67978 Locking Assembly Left Foot 7120 8677 Set Error Cards 7101 0569 1 Cover Error Cards 0624 0400 4 Screw 3c 98770 61605 Brightness Control Assembly 2190 0918 Lock Washer 0624 0403 ScreI A 3d NA Cover Hold Down Latch Includes the ne...

Page 63: ...e Board Waveform Board Convergence Bracket T ock VJasher D nh l I crc M3 5 X 0 6 lOmm 3 I Top Cover Bracket Lock Wasr er X 0 6 6mm Panhead Screw M3 S Flat Washer Round Spacer u rX O 6 25mm Panhead P C Tie Down Bra et Flathead Screw M3 5 X 0 6 mm LP Tie Down Bracket Rear Panel Assembly bly Includes Pnmary Wmng Assem The Next Seven Parts Barrier Block Relay Power Switch AC Power Connector Slide Swit...

Page 64: ...5 9 13 98770 Diagram I ...

Page 65: ...f J _ _ _ _ _ _ I l ____r_ v _X c ou n te r L oa d r F t__ Dki I H Blank Video Mixer 98770 Diagrams 9 15 Fu 1 Bright n Red In Green In Blue In Full Bright Out From Display Logic A13 From Mainframe From Display Logic A13 A33 A53 A54 Red Out To Green Out Video 1 B I u e O u t Amplifiers A6 f Sync Control L ___ J o l 0 l c w 1st Hit Y Cursor Address I Register Interrupt Control g s o x XCursor r Addr...

Page 66: ...O I Icra Program Multlplo or _ Bit Slico r Ino Typo Sequencer PrOc llors and LEP Count r Memory I Gln rator J elK LSYNC 1 I Addr j I Momory Cyclo r I Et L f S y C_______ T L 1 ol ocllon IYoke Addressing I I Writ Enable I vertICQI I Horizontal Logic I i tt and Pin Cushion Pin Cushion Vertical f 6AQW f r _ C cl Select Logic J c I ITop and and Regulator Top and I r r II I J S do r 1 EAL 91 I Me I Pm ...

Page 67: ...98770 Reference 10 1 Chapter 10 Reference I ...

Page 68: ...10 2 98770 Reference ...

Page 69: ...98770 Service Notes 11 1 Chapter 11 Service Notes I ...

Page 70: ...11 2 98770 Service Notes ...

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