HP HP 8904A Service Manual Download

Page: 1 / 139

Keysight / Agilent 8904A

at our website:

Click HERE

Summary of Contents for HP 8904A

Page 1: ...s underutilized and idle equipment along with credit for buybacks and trade ins Custom engineering so your equipment works exactly as you specify Critical and expedited services Leasing Rentals Demos In stock Ready to ship TAR certified secure asset solutions Expert team I Trust guarantee I 100 satisfaction All trademarks brand names and brands appearing herein are the property of their respective...

Page 2: ...a result of this transition the products and related documentation contained in this shipment may be labeled with either the Hewlett Packardname and logo the Agilent Technologies name and logo or a combination of both Information in this package may refer to Hewlett Packard HP but applies to your Agilent Technologies product Hewlett Packardand Agilent branded products with the same model number ar...

Page 3: ...eproduced by or for the U S Government pursuant to the Copyright License un der the clause at DFARS52 227 7013 APR 1988 Copyright HEWLETT PACKARD COMPANY 1987 EAST 24001 MISSION AVENUE TAF C 34 SPOKANE WASHINGTON U S A 99220 Service Manual HP Part 08904 90008 Other DocumentsAvailiable Operationand Calibration Manual HP Part 08904 90007 Operationand Application Guide HP Part 5953 8491 MicroficheSer...

Page 4: ...1 Regulatory Information Updated March 1999 1 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 5: ... power cord or supplied power cord set SAFETY SYMBOLS AIndicates instrument damage can occur if indicated operating limits are exceeded r n Indicates hazardous voltages 1 Indicates earth ground terminal WARNING A WARNING note denotes a hazard It calls attention to a procedure practice or the like which if not correctly performed or adheredto couldresult in personal injury Do not proceedbeyond a WA...

Page 6: ...o qualified personnel To prevent electrical shock do not remove covers Servicinginstructions are for use by qualifiedpersonnel only To avoid electrical shock do not perform any servicingunless you are qualified to do so The opening of covers or removal of parts is likely to expose dangerous voltages Disconnect the product from all voltage sources while it is being opened The power cord is connecte...

Page 7: ...erature outside the cabinet must be less than the maximum operating temperature of the product by 4 C for every 100 watts dissipated in the cabinet If the total power dissipated in the cabinet is greater than 800 watts then forced convection must be used Product Markings CE the CE mark is a registered trademark of the European Community A CE mark accompanied by a year indicated the year the design...

Page 8: ...rt 7 14 Section 8 Service Introduction to This Section 8 1 How the Section is Organized 8 1 Safety Considerations 8 1 Before Applying Power 8 1 Safety 8 1 Service Tools Helps and Information 8 3 Printed Circuit Board Extractor 8 3 Assembly Parts and Cable Locations 8 3 Other Service Documents 8 3 Recommended Test Equipment and Accessories 8 3 Schematic Symbology and Schematic Diagram Notes 8 3 Pri...

Page 9: ... g i t a l Assembly 8 43 How to Restore Options 001 and 003 i n a Replacement A2 D i g i t a l Assembly How to Replace the Memory Backup Battery 8 48 1 Service Sheets 1 through 4 schematics 8 50 8 46 reu 200CT88 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 10: ...th reference designations in alphanumeric order b Chassis mounted parts with reference designations in alphanumeric order c Mechanical parts with reference designations in numeric order Ordering Parts Instrument Serial Numbers Attached to the rear of the instrument is a serial number plate The first four digits and the letter are the instrument serial number prefix The last five digits serial numb...

Page 11: ... manual to bring it up to date Hewlett Packard offers a Documentation Update Service that will provide you with further updates as they become available If you operate or service instruments of different serialprefixes we strongly recommend that you join this service immediatelyto ensure that you manual is kept current For more information refer to the Documentation Update Service reply card inclu...

Page 12: ...ital to analog dB decibel dBm decibel referred dc direct current deg degree temperature interval or difference angle O C degree Celsius centigrade O F degree Fahrenheit O K degree Kelvin DEPC deposited carbon DET detector diam diameter DIA diameter used in transistor logic to 1 mW degree plane parts list DlFF AMPL differential amplifier div division DPDT double pole double throw DR drive DSB doubl...

Page 13: ...stance inductance capacitance RMO rack mount only r m s root mean square RND round ROM read only memory R P rack and panel RWV reverse working S ng parameter S B slow blow fuse used in parts list SCR silicon controlled rectifier screw SE selenium SECT sections voltage S second time plane angle SI silicon SIL silver SL slide SNR signal to noise ratio SPDT single pole double throw SPG spring SR spli...

Page 14: ... SECTION7 KXIFRONTPANELRETRoFlTWT KEYBOARD ASSEMBLY NOT SEPARATELY REPLACEABLE DIGITALASSEMBLY N W DIGITALASSEMBLY RESTORED DIGITALASSEMBLY NEW DIGITALASSEMBLY RESTORED BA ITERY 2 8V 46A IRUS DIOX PIN WASHERFL NM NO 000 WlN ID 25 IN ID BAlTERY 3V 1 2AHR LMIUM POLYCARBON REFERTO SECTION7 REFER TO SECTION 7 EPROM EPROM EPROM EPROM NO LONGER SEPARATELY REPLACEABLE ReplaceabIe P a r t s llfr Mtr Part ...

Page 15: ...850PF 1 100VDCCER CAPACITOR FXD7200PF 1 1WVDC CER CAPACITOR FXD64PF 1 1OOVDC CER 0 30 CAPACITOR FXD293PF 1 1WVDC CER CAPACITOR FXD OlUF 20 1WVDC CER CAPACITOR FXD584PF 1 100VDC CER CAPACITOR FXD1360PF 1 1WVDC CER CAPACITOR FXD129OPF 1 1WVDC CER CAPACITOR FXD438PF 1 100VDC CER CAPACITOR FXD22PF 5 POOVDC CER 0 30 NOT ASSIGNED CAPACITOR FXD 1UF 10 5OVDC CER CAPACITOR FXD OlUF 10 100VDCCER CAPACITOR F...

Page 16: ...R 0 30 NOT ASSIGNED CAPACITOR FXD4 7PF 5PF 100VDC CER CAPACITOR FXD 1UF lo 5OVDC CER A3C83 89 A3C90 A3C93 A3c94 200 A3C201 A3c202 Ax203 Ax204 A3C205 A3C206 Ax207 A3c208 A3c209 A3C210 A3c211 A3c212 A3C213 A3C214 A3C215 Ax216 A3C217 A3C218 A3C219 A3C220 A3c221 A3C222 A3C223 A3C224 A3C225 A3C226 A3c227 A3C228 A3C229 A3C230 A3C231 A3C232 A3C233 299 A3C300 A3c301 A3C302 A3C303 A3c304 A3C305 400 A3C401 ...

Page 17: ...APACITOR FXD6 8UF 1Oo o 35VDC TA CAPACITOR FXD OlUF lo lOOVDCCER CAPACITOR FXD6 8UF 10 35VDC TA CAPACITOR FXD OlUF lo lOOVDCCER CAPACITOR FXD6 8UF 1Oo o 35VDC TA CAPACITOR FXD OlUF 10 lOOVDCCER CAPACITOR FXD 6 8UF 1Oo o 35VDC TA NOT ASSIGNED CAPACITOR FXD lOOPF 5 lOOVDCCER CAPACITOR FXD 1OOPF 5 lOOVDCCER CAPACITOR FXD4 7PF SPF 1OOVDC CER CAPACITOR FXD4 7PF 5PF 1OOVDCCER CAPACITOR FXD lOOPF 5 lOOVD...

Page 18: ...80 1901 0860 1901 0050 1901 0050 1901 0050 1901 0050 1902 0627 1902 0627 1902 0627 1902 0627 1901 0050 1901 0050 3 3 8 4 8 8 8 DIODE SWITCHING8OV 200MA 2NS DO35 DIODE SWITCHING8OV 200MA 2NS DO 35 DIODE HV RECT WOV 1A DIODE HVRECT 600V 1A DIODE HVRECT 600V 1A DIODE HVRECT 600V 1A NOT ASSIGNED DIODE SWITCHING8OV 200MA 2NS DO35 DIODE SWITCHING8OV 200MA 2NS DO35 DIODE SWITCHING8OV 200MA 2NS 00 35 DIOD...

Page 19: ...D 1A 500MA 100VDC5VDC COlL RELAY REED 1A 500MA 100VDC5VDC COIL RELAY REED 1A 500MA l00VDC 5VDC COIL RELAY REED 1A 500MA lOOVDC 5VDC COIL NOT ASSIGNED RELAY 2C 5VDCCOlL 5A 125VAC NOT ASSIGNED RELAY REED 1A 500MA l00VDC 5VDCCOIL RELAY REED 1A 500MA l00VDC 5VDCCOIL NOT ASSIGNED RELAY REED 1A 500MA l00VDC 5VDGCOlL RELAY REED2A 2A lOOVDC 5VDCCOlL 200VA RELAY REED2A 2A 100VDC 5VDCCOlL 200VA INDUCTOR RF ...

Page 20: ...854 1177 1 1 1 2 8 12 1854 1177 e 28480 18561177 1654 1177 1854 1177 1853 0659 18530659 1854 1177 1854 1177 1854 1177 1854 1177 18530659 18534659 1854 1177 1854 1177 8 28480 28480 28480 28480 28480 28480 1854 1177 18530659 18550276 18554276 18530659 1854 1177 18544813 1853 0462 1853 0462 18544813 1854 1177 18534659 1854 1177 18534659 6 5 6 6 5 6 5 8 8 5 6 5 6 5 TRANSISTOR NPN S I PD 625MW R 200MHZ...

Page 21: ... 05W F TC 0 100 RESISTOR 100 1 05W F TC O 100 RESISTOR 1 33K 1 05W F TC O 100 RESISTOR 1 96K 1 05W F TC 0 100 RESISTOR 196 1 05W F TC 0 100 RESISTOR681 1 05W FTC O 100 RESISTOR 681 1 05W F TC O lOO RESISTOR 10 1 05W F TC O 100 RESISTOR 10 1 05W F TC 0 100 RESISTOR9 09K 1 05W F TC 0 100 RESISTOR 1K 1 05W F TC 0 100 RESISTOR75 1 05W F TC O 100 RESISTOR3 16K 1 05W F TC O lOO RESISTOR 7 968K 1 125W TF...

Page 22: ...P ADJ 17 TRN RESISTOR3 16K 1 05W F TC O 100 RESISTOR 3 16K 1 05W F TC 0 100 RESISTOR 51 1 1 125W F TC 0 100 RESISTOR51 1K 1 05W FTC O lW RESISTOR TRMR20K 10 C TOP ADJ 17 TRN RESISTOR316K 1 125W F TC 0 100 19701 5053R C3 1 8 T0 4642 F C3 1 8 TO 4641 F 0698 7276 0698 7252 5 7 1 1 24546 24546 0698 7266 0757 0417 0698 7229 0698 7229 1 24546 24546 24546 24546 C3 1 8 TO 511R F C3 118 TO 511R F 0698 7248...

Page 23: ...25W F TC 0 25 RESISTOR 500 1 125W FTC 0 25 RESISTOR 500 1 125W FTC 0 25 RESISTOR 1K lo 125W F TC 0 25 RESISTOR 6 81 1 125W FTC 0 100 RESISTOR 75K 1 125W FTC O 100 RESISTOR TRMR20K 1Ph C TOP ADJ 17 TRN RESISTOR 100 1 125W F TC O 100 RESISTOR 100 1 125W FTC 0 100 RESISTOR 1K I 125W FTC O 25 RESISTOR 75K 1 125W F TC 0 100 RESISTOR 1K 1 125W F TC O 100 RESISTOR 1K 1 125W F TC O lOO RESISTOR 2K 1 125W ...

Page 24: ...5 069a0085 0757 0394 0757 0394 069a882i 08904 80004 9100 4444 1251 0600 1251 0600 1251 0600 1251 0600 1251 0600 1251 0600 1251 0600 1251 0600 1251 0600 1251 0600 RESISTOR21 5K 1 125W FTC O 100 RESISTOR2 61K 1 125W FTC O 100 RESISTOR2 61K 1 125W F TC O lOO RESISTOR51 l 1 125W F TC 0 100 RESISTOR 51 1 1 125W F TC O lOO NOT ASSIGNED RESISTOR 5 62 1 125W F TC 0 100 XFMR POT CORE NOTASSIGNED TRANSFORME...

Page 25: ... IC INSTM AMPL CUR 10 DIP PPKG NOT ASSIGNED IC COMPARATOR GP QUAD 14 DIP C PKG NOT ASSIGNED DIODE ZNR 24V 5 DO 35 PD 4W TC 094 NOT ASSIGNED DIODE ZNR 15V 5 DO 35 PD 4W TC 087 NOT ASSIGNED 28480 27014 27014 27014 27014 27014 27014 1 LF356BJ LM6361J SELECTED LM6361J SELECTED LM6361J SELECTED LH0002CN LM339J 3 1826 0759 9 1 04713 A3VR1 18 A3VR19 A3VR20 30 A3VR31 A3VR32 200 A3VR201 A3VR202 205 A3VR206...

Page 26: ...J 17 TURN 07574280 3 1 RESISTOR 1K 1 125W F TC 0 100 07574420 3 1 RESISTOR 750 1 125W F TC O lW 07570290 5 1 RESISTOR 6 19K 1 125W F TC Ot100 21W755 4 1 RESISTOR TRMR 50 10 C SIDE ADJ 17 TURN 06988823 0 1 RESISTOR 8 25 1 125W F TC O lW 07570180 2 1 RESISTOR 31 6 1 125W FTC O 100 19024960 6 2 DIODE ZNR 12V 5 DO35 PD 4W TC O77 19024960 6 2 DIODE ZNR 12V 5 D 135 PD 4W TC 077 Mfr Mfr Part Number Code ...

Page 27: ...Mfr Part Number Code A10 Note The A10 and A3 Assemblies are identical Refer to A3 for individualcomponent part numbers tRefer t o Section 7 for update information 6 18 Factory Selected Component Refer t o Section 5 A Errata part change reu OlNOV89 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 28: ...401TO REAR PANEL OUT 2 LOW W400TO FRONTPANELOUT 1 HIGH AU401 TO FRONTPANELOUT 1 LOW 08904 61007 0 6 COAXCABLEBNCPCB 08904 61007 0 6 COAXCABLEBNCPCB 08904 61007 0 6 COAXCABLEBNCPCB ADDED FOR OPTION 002 A105400TO FRONTPANEL OUT 2 HIGH ADDED FOR OPTION002 A1W401 TO FRONTPANELOUT 2 LOW REAR PANEL 10 MHZ EXl REF INTO A U l O l 08904 61007 0 6 COAXCABLEBNCPCB 089C4 61007 0 6 COAXCABLEBNCPCB 08904 61007 ...

Page 29: ...DDEDFOR OPTION 006 A3400TO A6J1 COAX CABLE FEMALESMCSMC ADDED FOR OPTION 006 A3401 TO A6J2 COAX CABLE ADDED FOR OPTION 00s A6J4TO FRONT PANEL CH1 LOW COAX CABLE ADDED FOR OPTION 006 A6J3TO FRONT PANEL CH1 HIGH COAX CABLE BNC PCB ADDED FOR OPTION 005 A2J12TO REAR PANEL RESET INPUT COAX CABLE BNCPCB ADDED FOR OPTION005 AU11 TO REAR PANEL RESET OUTPUT COAX CABLE BNC PCB ADDED FOR OPTION 005 A2JlO TO ...

Page 30: ...D NLJTSPCLY lm232 THD l IN TW 562 WD W A S H E W INTL T 112 IN 5051N ID PLUGHOLE 500D PLUGHOLE 500D PLUGHOLE 50OD PLUGHOLE 500D W A S H E U INTLT 114 IN 9561KID NLJTHEX DBL CHAM 11432 THD 094 IN T SCREWLOW FEMALE AMPHD C O SCREWLOCK FEMALE AMPHD CONN WASHERU HLCL 3 0 MM 3 1 MM ID WASHER LK HLCL 3 0 MM 3 1 MM ID WASHER LK 505 ID ADDED FOR OPTION 004 NOT ASSIGNED WASHER LK 505 ID ADDED FOR OPTION 00...

Page 31: ...SEMBLY M3 X 0 5 6MM LG 40 41 42 43 44 45 46 2712A to 2917A 2923A and abow 47 4 7 1 05151651 4 SEE SECTION 7 FOR FRONT PANEL RETROFITKIT NOT ASSIGNED SCREW MACHINE ASSEMBLY M3 X 0 5 6MM LG SCREW MACHINE ASSEMBLY M3 X 0 5 6MM LG 48 49 2712A to 2917A 2923A and abow 50 51 52 53 53 54 50 t 05151851 05151851 4 4 28480 05151851 28480 0515 1851 0515 1851 4 SEE SECTION 7 FOR FRONT PANELRETROFIT KIT NOT ASS...

Page 32: ...28480 28480 4014539 50010539 50418801 50414801 50418801 50414801 50414803 5180 1871 1 1 1 2 28480 28480 28480 28480 0890440016 08904 00017 1460 1345 1460 1345 2712A to2917A 7 3 t 7 4 t 2923A and a b m 73 74 05150367 5 2 SCREW MACHINEASSEMBLY M2 5 X 0 45 SEE SECTION 7 FOR FRONT PANELm o mKIT SCREW MACHINEASSEMBLY M2 5 X 0 45 SEE SECTION 7 FOR FRONT PANEL RETROFITKIT NOT ASSIGNED NOT ASSIGNED SCREW ...

Page 33: ...TION 004 SCREW MACHINEASSEMBLY M3 X 0 5 6MM LG SCREW MACHINEASSEMBLY M3 X 0 5 6MM LG SCREWMACHINE ASSEMBLY M3 X 0 5 6MM LG SCREWMACHINE ASSEMBLY M3 X 0 5 6MM LG SCREW MACHINEASSEMBLY M3 X 0 5 6MM LG SCREW MACHINEASSEMBLY M3 X 0 5 6MM LG SCREW MACHINEASSEMBLY M3 X 0 5 6MWLG SCREW MACHINEASSEMBLY M3 X 0 5 6MM LG AY SHLD OUT PUT WASHER LK HLCL 3 5 MM3 6 MM ID ADDED FOR OPTION002 SCREW MACH M3 5 X 0 6...

Page 34: ...002 ADDEDFOR OPTION 002 ADDEDFOR OPTION 002 0515 1851 4 1 SCREW 3 0 6 SEM PNTX 05151851 4 1 SCREW 3 0 6 SEM PNTX 0515 1851 4 1 SCREW 3 0 6 SEM PNTX ADDEDFOR OPTION 002 ADDEDFOR OPTION 002 ADDEDFOR OPTION 002 0515 1851 4 1 SCREW 3 0 6 SEM PNTX 0515 1851 4 1 SCREW 3 0 6 SEM PNTX 0515 1851 4 1 SCREW 3 0 6 SEM PNTX ADDEDFOR OPTION002 ADDEDFOR OPTION 002 ADDED FOR OPTION 002 NOT ASSIGNED 08904 00015 2 ...

Page 35: ...NED LABEL FOR OPTION 006 SCREW 3 06 SEM PNTX ADDED FOR OPTION 006 SCREW 3 0 6 SEM PNTX ADDED FOR OPTION006 SCREW MACHINEASSEMBLY M3 5 X 0 6 ADDED FOR OPTION 006 SCREW MACHINE ASSEMBLY M3 5 X 0 6 ADDED FOR OPTION 006 SCREW MACHINE ASSEMBLY M3 5 X 0 6 ADDED FOR OPTION 006 SCREW MACHINE ASSEMBLY M3 5 X 0 6 ADDEDFOR OPTION 006 CABLE TIE OED WW ADDED FOR OPTION 005 CABLE TIE 062D WW ADDED FOR OPTION 00...

Page 36: ...I ZZ 9 68AON1O naJ Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 37: ...Replaceable Parts Model 8904A L Figure 6 1 Main Deck Assembly Top 2923A and above rev 01NOV89 6 22 4 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 38: ...Model 8904A Replaceable Parts Figure 6 1 Main Deck Assembly Top Option 005 2948A and above rev 30NOV89 6 23 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 39: ...Replaceable Parts Model 8904A Figure 6 2 Main Deck Assembly Bottom reu 3ONOV89 6 24 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 40: ...eplaceable Parts Model 8904A Figure 6 2 Main Deck Assembly Bottom Option 006 2948A and above rev 30NOV89 6 24 1 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 41: ...odel 8904A W 0 W W wl Figure 6 3 Front Panel Assembly 2712A to 2917A See Section 7for Front Panel Retrofit Kit 6 24 2 reu 30NOV89 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 42: ...Model 8904A Replaceable P a r t s Figure 6 3 Front Panel Assembly 2923A and above reu 30NOV89 6 24 3 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 43: ...Model 8904A Replaceable Parts Figure 6 3 Rent Panel Assembly Option 006 2948A and above reu 30NOV89 6 25 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 44: ...Replaceable Parts Model 8904A Figure 6 4 Rear Panel Assembly rev 30NOV89 6 26 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 45: ...Model 8904A Replaceable Parts Figure 6 4 Rear Panel Assembly Option 005 2948A and above rev 30N0V89 6 26 1 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 46: ...Model 8904A Replaceable Parts Figure 6 5 Covers Labels and ROMs rev ZSSEP88 6 27 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 47: ...Replaceable Parts Model 8904A Figure 6 6 Output Cables 1 of 2 reu 30NOV89 6 28 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 48: ...Model 8904A Replaceable Parts Q Figure 6 6 Output Cables Option 005 29484 and above 2 of 2 rev 30N0V89 6 29 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 49: ... Front Panel Output Conversion 7 5 Description 7 5 Parts Required 7 5 Tools Required 7 5 Modification Procedure 7 5 Operation Verification 7 6 Firmware Updates A2U12 and A2U13 7 9 Modification For Possible Ground Wire Shock Hazard 7 10 Modification For Output Overvoltage Protection Improvement 7 13 Modification For Potential Power Supply Short 7 14 Cabinet Parts Color Change 7 14 Modification For ...

Page 50: ...HP 11816A from your local Hewlett Packard Sales office To retrofit Option 002 second internal synthesizer and output order HP 11817A from your local Hewlett Packard Sales office To retrofit Option 003 fast hop and digital modulation capability order HP 11818A from your local Hewlett Packard Sales office To retrofit Option 004 front panel connectors moved to rear panel follow the instructions in se...

Page 51: ...A and 22987A 27887A Firmware History The first two editions of firmware had several problems and were incomplete though useable It is recommended that all instruments be upgraded to Revision 22987A with HP 08904 87010 as A2U12 Problems noted in the previous firmware revision were fixed However the following problem has been noted When used with HP IB controllers which process HP IB commands very f...

Page 52: ...oint Nut Driver No 2 Pozidriv Screwdriver Diagonal Cutters Needle nose Pliers Modification Procedure Removing Bottom Cover 1 Turn the instrument off and unplug the power cord 2 Lay the instrument on its top and unscrew the Pozidriv screw in the middle of the rear edge of the bottom cover This is a captive screw and will cause the bottom cover to push away from the frame Slide the cover back about ...

Page 53: ...e date and option number on the new blank label in the following form day month year Opt 004 Peel off the protective backing and stick the label on the rear panel Do not place the label over the existing serial number tag Operation Verification 1 Connect the power cord and turn the instrument on 2 The instrument should beep immediately upon power up and then again about 4 5 seconds later The displ...

Page 54: ...er No 2 Pozidriv Screwdriver Diagonal Cutters Needle nose Pliers Modification Procedure RemovingBottom Cover 1 Turn the instrument off and unplug the power cord 2 Lay the instrument on its top and unscrew the Pozidriv screw in the middle of the rear edge of the bottom cover This is a captive screw and will cause the bottom cover to push away from the frame Slide the cover back about 6 5 mm 0 25 in...

Page 55: ...in the holes 2 Replace the bottom cover by reversing the removal procedure 3 Remove the Option 004 label from the rear panel Operation Verification 1 Connect the power cord and turn the instrument on 2 The instrument should beep immediately upon power up and then again about 4 5 seconds later The display should read HP 8904A Main Selection Level f l Channel Config 3 Key in the following keys This ...

Page 56: ...ent Changes Model 8904A Figure 7 1 Ront Panel Output Hardware h Figure 7 2 Rear Panel Output Hardware rev lSDEC89 7 7 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 57: ...Instrument Changes Model 8904A w5 Figure 7 3 Output Cable Routing ALL Options 7 8 rev 15DEC89 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 58: ...oes not pull off easily after backing out the screw on the rear edge back out the screw on the rear edge of the bottom cover also 3 Forinstruments with serialprefix 29428 and below inlocate U12 and U13onthe A2 assembly front horizontal board For instruments with serialprefix 2948A and above locate only U12 They are in sockets The reference designator is labeled beside the IC 4 Pry out the old ROM ...

Page 59: ...ial 2 With ground contact interrupted the chassis could become hot if the neutral or high lines of the power cord come in contact with the chassis through some other fault The chassis then becomes a shock hazard Withproper wrapping and soldering of the ground connections the ground wire will maintain a reasonable mechanical connection even though the solder has deteriorated This information explai...

Page 60: ...connection to the line socket A sharp X acto knife is recommended The shrink tubing will not be replaced 5 Inspect the soldered wire connection on both ends of the ground wire and compare the wire wrapping to figure 7 5 One end of the wire goes to the chassis ground lug and the other end to the socket ground connection on the rear panel line socket 6 If the solder joints are properly wrapped and s...

Page 61: ... iron You will also need a roll of solder wick 6 On the line cord socket heat the solder on the lug where the ground wire is attached and apply the solder wick At the same time move the ground wire around and pull the ground wire out of the lug Avoid touching any of the loose wires with the soldering iron 7 Cut an 8 cm 3 2 inch length of new 18 gauge ground wire HP 8150 2919 Strip 8 mm 5 16 inch o...

Page 62: ...4A Multifunction Synthesizer has a potential problem On instruments with serial prefix 2747A and below excessive leakage in four clamp diodes A3CR415 to A3CR418 shifts the trip point of the circuit to a voltage too high to protect the output against inadvertent application of high reverse voltage No failures due to this problem have been observed but all instruments with serial prefix 2747A and be...

Page 63: ...ntly cause the following error to be displayed Reference Loop Reports Out O f Lock To prevent or solve this problem it is recommended that an insulator HP part 08904 00015 be installed on the inside of the bottom cover The insulator has a peal off adhesivebacking Place it just behind the front perforations It should cover any scuff marks left by the heatsinks 7 10 CABINET PARTS COLOR CHANGE Serial...

Page 64: ...thead Pozidriv Flatwasher 3 mm ID Hole Plug 0 5 inch Diameter Display Shield Line Switch Bracket Keypad Keyboard Assembly Al Front Panel Assembly with Captive Lockwasher HPPartNumber 1 CD 0371 3802 0515 1851 0515 2028 3050 0891 6960 0132 08904 00021 08904 00022 08904 40006 08904 60201 08904 61021 3 4 9 7 1 4 1 5 4 8 INSTALLATION PROCEDURE Removing Covers Usestandard electrostatic discharge ESD pre...

Page 65: ...e instrument 9 Remove the LINE keycap from the line switch The switch s stem is easily snapped or pulled out of the switch s body When removing the keycap do not allow the stem to flex and do not hold the body of the switch Pull the keycap straight out 10 Press the new unlabeled keycap HP 0371 3802 on the line switch Transferringthe A5 LCD Display 11 Remove the four Torx screws with lockwashers it...

Page 66: ... are positioned correctly before pushing the front panel completely into the frame 21 Tighten the screws in the frame in the following sequence item 76 80 81 75 78 77 then 79 Tighten the screws to 1 3 N m 11in lb If the top screws bind remove the front panel and try repositioning the display shield installed in step 15 22 Position the line switch in the frame and the hole in the front panel then t...

Page 67: ...hanges Model 8904A Figure 7 6 Dont Panel Assembly 2923A and above 7 18 Firmware UpdatesIHardware Modifications reu 15DEC89 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 68: ...o A1 Keyboard Assembly Interface 8 38 A2 Digital Assembly To A5 Display Assembly Interface 8 41 A3 or A10 Output Assembly 8 42 Phase Synchronization Option 005 8 42 1 How To Restore the Serial Number In a Replacement A2 Digital Assembly 8 43 How To Restore Options 001 003 and 005 In A Replacement A2 Digital Assembly 8 46 How To Replace the Memory Backup Battery 8 48 1 Service Sheet 1 Output Assemb...

Page 69: ...t fuse is installed An uninterrupted safety earth ground must be provided from the main power source to the instrument input wiring terminals power cord or supplied power cord set In addition verify that a common ground exists between the Multifunction Synthesizer and all test equipment Safety Pay attention to warnings and cautions They must be followed both for your protection and to avoid damage...

Page 70: ... sure that only 250 volt fuses with the required rated current and of the specified type normal blow time d e b etc are used for replacement Do not use repaired fuses or short circuited fuseholders To do so could create a shock or fire hazard Disposing of the memory backup battery The memory backup battery on the A2 Digital Assembly is a lithium battery A2 is the large horizontal circuit board und...

Page 71: ...le 6 3 Replaceable Parts in Section 6 Mechanical chassis parts have reference designators with no prefix letter Other Service Documents Service Notes Manual Updates and other service literature are available through Hewlett Packard For further information about Manual Updates refer to Volume 1 paragraph 1 11 RecommendedTest Equipmentand Accessories Test equipment and test accessories required to m...

Page 72: ...he wider stripe and the third number t h e narrower stripe Example denotes white base Seriai Prefix o f instrument to which Schematic directly applies Reference designations within outlined assemblies are abbreviated Full designation includes assembly number for example R l o f assembly A2 is A 2 R I Connector symbols within the borderlines of board assemblies signify connections to the assembly w...

Page 73: ...r knob Numbered Test Point measurement aid provided Encloses wire or cable color code Code used is the same as the resistor color code First number identifiesthe base color second number identifies the wider stripe and the third number identifies the narrower stripe e g 917 denoteswhite base yellow wide stripe violet narrow stripe A direct conducting connection to earth or a conducting connection ...

Page 74: ...Indicates a pushbutton switch with a momentary ON position Feedthroughcapacitor Acts as a feedthrough terminal when mounted on a chassis or a frame Indicates a PIN diode Indicates a current regulation diode Indicates a voltage regulation diode Indicates a capacitive varactor diode Indicates a Schottky hot carrier diode Light emitting diode Multiple transistors in a single package physical location...

Page 75: ...bit Input Input that when active inhibits blocks the active state outputs of a digital device Analog Input Input that is a continuous signal function e g a sine wave Polarity Indicator used with Inhibit Indicator Indicates that the relatively low level signal inhibits blocks the active state outputs of a digital device Output Delay Binary output changes state only after the referenced input m re t...

Page 76: ...ut will be active Amplifier The output will be active only when the input is active can be used with polarity or logic indicator at input or output to signify inversion Signal Level Converter Input level s are different than output level s Bilateral Switch Binary controlled switch which acts as an on off switch to analog or binary signals flowing in both directions Dependency notation should be us...

Page 77: ...ut Data Input Always enabled by another input generallya C input see Dependency Notation When the D input is dependency enabled a high level at D will set the flip flop a low level will reset the flip flop Note strictly speaking D inputs have no active or inactive states they are just enabled or disabled Count Up Input When active increments the contents count of a counter by m counts m is replace...

Page 78: ...entiatesbetween several address inputs indicates dependency or indicates demultiplexingof address inputs and outputs The m suffix indicates the number of cells that can be addressed Enable Dependency Binary affecting input which when active enables all outputs When inactive open collector and open emitter outputs are off and three state out puts are at an external high impedance state When the ena...

Page 79: ...teresis one threshold for positive going signals and a second threshold for negative going signals n Active Active State A binary physical or logical state that corresponds to the true state of an input an output or a function The opposite of the inactive state 8 11 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 80: ...TPUTS TTL 1 I V I EXTERNAL PULL UP RES1STOR NAND GATE H H L H H OR GATE WITH INVERTED INPUTS NOR GATE A B X B AND GATE WITH INVERTED INPUTS a x B BUFFER X Wl L H INVERTER OPEN EMITTER OUTPUTS ECL I V I 1 1 I I EXTERNAL RESISTOR PULL DOWN l v 8 12 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 81: ... the dynamic indicatorand the polarity in dicator symbols I I OUTPUT High to Low Edge Sensitive DELAYED OUTPUT RESPONSE I INPUTJ C OUTPUT Delayed Output I OUTPUT DELAY indicator symbol 7 shows that the out put becomes effective after the input signal returns to its inactive state I Active High Input Delayed Output Active Low Input I INHIBIT INPUTS U INHIBIT indicator symbol indicatesan input that ...

Page 82: ...ectively removing that device from the circuit When the X1 input is active the associated input output pair are bi directionally connected together When X1 is inactive the connection is broken When the controlled or gated input or output already has a functional label D is used here that label will be prefixed by the identifying number If the input or output is affected by more than one gate or co...

Page 83: ...numerical synthesis technique The heart of the synthesizer is a single digital waveform synthesis integrated circuit DWSIC For each channel the DWSIC generates a continuous stream of numbers which represent instantaneous levels of the waveform This digital waveform is then converted to an analog signal by a digital to analog converter or DAC one converter for each output port The analog signal is ...

Page 84: ...ts directed to the instrument s internal computer generates the basic waveforms in their digital form for each channel modulates and combines them still in digital form as requested and delivers them to the appropriate digital to analog converter Figure 8 2 shows a one channel portion of the DWSIC The diagram is highly simplified but detailed enough to illustrate general concepts such as 0 generat...

Page 85: ... feeds back to the Q input of the Phase Accumulator For purposes of illustration assume all data is carried on four bit buses Also assume that inputs to the Frequency Adder are constants so that the P input of the Phase Accumulator is a four bit constant P The Frequency Adder will be discussed later P can theoretically take on values between 0 and 24 1 or 15 in decimal This constant represents a f...

Page 86: ...is the bottom waveform of Figure 8 3 Generating a Sine Wave So far the waveform still a numerical representation is a staircase The staircase itself is one of the waveforms available at the channel outputs After analog conversion and filtering the waveform is a ramp To convert the staircase into a sine wave the data from the Phase Adder is fed into the Waveform Table a look up table resident in a ...

Page 87: ...ave been assumed to be constants which control frequency phase and amplitude In practice the data inputs may vary with time and thus modulate the waveforms This feature requires Option 001 In the Fkequency Adder the Frequency Data is held constant to set the CW frequency the FM Data can be varied to generate FM In the Phase Adder QM Data is varied to generate QM In the Amplitude Multiplier the AM ...

Page 88: ...VEL SUM I PHASE x L FREOUENCY CHANNEL B 9PHASE PHASE L FREOUENCY 0 L FREOUENCY 0 CHANNEL C CHANNEL D Figure 8 6 Conceptual Block Diagram of an Instrument with Options 001 and 002 8 20 Principles of Operation Overall Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 89: ...ains waveform fidelity at low levels The Floating Output Amplifier is a single ended to differential converter with a gain of 1 12 In its float mode either the high or the low output not shown in the block diagram can be floated up to 10 V while the signal from the instrument itself appears on the other output Output impedance is 50R Attenuator 2 can be programmed for 0 or 48 dB Both the high and ...

Page 90: ... I I I I I A5 ASSY I L A I A4 POWER SUPPLY ASSY t 1 I OUTPUT OPT 0021 DWSIC REF OUT DIGITAL PORT OUTPUTS 1 2 Figure 8 8 Interrelationship of Instrument Assemblies Serial prefix 2942A and below 8 22 Principles of Operation Overall rev 15DEC89 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 91: ...PU OUTPUT OPT 005 OPT 005 OUTPUT I 1 RE INPUT I A1 ER I I I DIGITAL PORT I p t ASSY OUTPUTS Figure 8 8 1 Interrelationship of Instrument Assemblies Serial prefix 2948A and above rev 15DEC89 Principles of Operation Overall 8 22 1 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 92: ...and overvoltage interrupts scan the keyboard when a key press is detected interface with HP IB generate the reference clocks switch between internal and external references control the beeper generate and time the display backlight control the front panel displays and annunciators output waveform data to the digital port Because some circuits on the assembly are proprietary and because the assembl...

Page 93: ...tput of the DAC is converted to a voltage by the series combination of resistors R210 R224 and R221 R224 DAC Level is adjusted to give the correct waveform amplitude Connector 54 is a convenientpoint for testing the DAC when jumper 5201 is moved to connect point 2 to point 3 Track and Hold Circuit Service Sheet 1 After data is placed on the input of the DAC the DAC requires 300 ns that is one half...

Page 94: ...204 and CR205 clamp the collectors to lOV Q204 and Q202 are emitter followers which drive one side of transformer T1 Q203 and Q201 similarly drive the opposite side of T 1 but are 180 out of phase Capacitor C201 forces the junction of R201 and R202 to follow the bases and emitters of Q201 and Q203 with a fixed dc offset C205 performs a similar function to the other half of the circuit Sampler Swit...

Page 95: ...ccuracy the output stage assures quick response and output drive For high frequency signal components capacitor C201 bypassesthe input stage so that the input signal appears at the gate of FET Q210 A high input impedance is maintained because capacitors C226 and C225 short resistors R216 and R218 respectively to the output of the output stage which is a unity gain follower Both ends of R216 and R2...

Page 96: ... distortion noise or dc offset The amplifier is a discrete design of a standard inverting operational amplifier The gain is the ratio of the parallel combination of R48 and R231 to R47 The Audio Amplifier has three stages 1 an input stage U9 Q14 and QE 2 an intermediate high gain stage Q20 and Q21 and 3 an output driver stage Q18 and Q19 The virtual ground of the amplifier is the junction of C40 a...

Page 97: ... frequency balance The 16 and 16V power supply regulators Q300and Q301 supply current to only the amplifier This minimizes the effects of the large current needs of the amplifier on the other circuits and minimizes distortion Overvoltage Protectionand Output Circuits Service Sheet 4 Between the Floating Output Amplifier and the output connectors are several circuits Balun T400 improves the balance...

Page 98: ...sing the troubleshooting information on the schematic diagrams NOTE If the A2 Digital Assembly is replaced it will be necessary to restore the instrument s serial number and where applicable Option 001 andfor 003 in non volitile memory Theprocedures to do thisfollow the last troubleshooting procedure The the troubleshooting procedures verify the signals in the 0 A2 Digital Assembly to A3 or A10 Ou...

Page 99: ...p a If the instrument has Option 002 a second output assembly A10 and Output 1 the output from the A3 Output Assembly is to be checked move the A10 Output Assembly out of the way Refer to Figure 8 11 How to Access A3 in Instruments Equipped with Option 002 b Check that switches 1and 2 of the Service Switch S1 on the A2 Digital Assembly are open and switches 3 through 10 are closed NOTE The referen...

Page 100: ...t with needlenose pliers while applying gentle upward pressure with the PC board extractor Extractor should exert pressure on metal shield not on PC board except where post does not extend through shield 5 Lift A10 from instrument and carefully lay A10 aside coax cables will still be connected 6 Replace hold down screw from step 3 with spacer found under A10 into mounting hole in center of A3 This...

Page 101: ...n s 26 a n d 2 7 I I _ _ _ _ _ _ _ _ _ Serial Prefix 2948A and above o n l y N o t Opt 006 I Opt 006 5 lVdc to J P i n 34 8 32 Figure 8 12 Power Supply Testpoints on A3 or A10 Troubleshooting Digital Output Interface rev 15DEC89 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 102: ...72 MHz count of 6 71088 MHz 4a Digital to AnalogConverter Check Using an Oscilloscope a On the Multifunction Synthesizer press SHIFT PRESET After the instrument presets key in For A3 Output Assembly fl Channel Config NEXT NEXT NEXT WAVE FORM t FREQ 25 6 Hz AMPTD 10 V For A10 Output Assembly fl Channel Config WAVE FORM t FREQ 25 6 Hz AMPTD 10V NOTE Setting the frequency to exactly 25 6 H z inputs a...

Page 103: ... Config WAVE FORM L FREQ 25 6 Hz AMPTD 10V NOTE Setting the frequency to exactly 25 6 H z inputs a TTL squarewave to each input of the DAC latches As the DAC s data input lines are probed from the most significant bit the the least significant bit the frequency i s consecutively divided by two c Connect the high impedance input of the counter to the pin of the IC listed below The counter should re...

Page 104: ...Attenuator 12dB Attenuator 6 dB Attenuator On Off Switch 48 dB Attenuator Float Ground Switch A3 Key Sequence SHIFT FILTER 1 fl fl Filter Select AMPTD 1OV 625 rnV 1ov 2 5V 1ov 5v SHIFT OUTPUT 1 ON SHIFT OUTPUT 1 OFF AMPTD 1OV 39 rnV SHIFT FLOAT 1 ON SHIFT FLOAT 1 OFF A10 Key Sequence SHIFT FILTER 2 fl fl Filter Select AMPTD 1OV 625rnV 1ov 2 5V 1ov 5v SHIFT OUTPUT 2 ON SHIFT OUTPUT 2 OFF AMPTD 10V ...

Page 105: ...nnect the oscilloscope or logic probe to pin 11of U2 e Key in 80 then SHIFT As the shift key is pressed the steady state TTL high should go momentarily low then back to high The logic probe should blink The trace on an oscilloscope shouldblink perceptibly or if the oscilloscopeis in the normal trigger mode a single sweep should be triggered f Press SHIFT PRESET After the instrument presets momenta...

Page 106: ...3 7 A3 IC 1 Pin I J1 and J5 A2 Pin IC I Pin I 3 32 U105 2 2 1 15 IU105 I 10 1 DAC DAC A10 I J1 and J6 I A2 3 Pin 14 13 11 6 4 3 14 13 11 6 4 3 J1 and J5 Pin IC u5 u5 u5 u5 u5 u5 u4 u4 u4 u4 u4 u4 13 12 11 10 9 8 7 6 5 4 3 2 u5 u5 u5 u5 u5 u5 u 4 u4 u4 u4 u4 u4 Miscellaneous Control 1 I Miscellaneous Control I t A10 I J1 and J6 I A2 I A3 I J1 and J5 I A2 1 122 IC I Pin 1 19 Pin u35 u35 Pin 1 1 3 5 ...

Page 107: ...ital Assembly are open and b On the Multifunction Synthesizer press SHIFT PRESET After the instrument presets key in switches 3 through 10 are closed SHIFT SERVICE fl Keyboard Check c Press each key and check that the name of the key which appears in the lower left hand of the display agrees with the key pressed NOTE A beep will also be heard after each keypress Press f4 twice to exit this mode 1b...

Page 108: ... High Goes Low Always High Goes Low Always High Goes Low Always High Goes Low Always High Goes Low Always High Always Low Always High Blinks High Blinks High Blinks High Blinks High Blinks High 2 FLOAT and ON Annunciators Check On the Multifunction Synthesizer press SHIFT PRESET After the instrument presets key in the sequence indicated listed in the following table The front panel annunciators sh...

Page 109: ...ets key in SHIFT SERVICE NEXT NEXT f3 Memory Map Access NEXT NEXT The four front panel HP IB annunciators RMT LSTN TALK and SRQ should be on Pins 15 14 13 and 12 respectively of U2 should all be TTL low b Key in 0 F The HP IB annunciators should be off Pins 15 14 13 and 12of U2 should be high Note J1 is the 22 pin connector on the front right edge of A2 Pin 1 is nearest the center of the board The...

Page 110: ...nt right side of A2 An ac waveform of 80 to 300 Vpp should be observed The period should be approximately 2 ms The amplitude will vary with brightness of the display and is adjustable See Adjustment 5 Display Backlighting and Contrast in Section 5 of the Operation and Calibration Manual Display contrast is also adjustable Note that high voltages are measured A no load or short on the backlighting ...

Page 111: ...nt Oscilloscope HP 1740A or Tektronix 2235 Procedure 1 If the A3 Output Assembly is to be checked and the instrument also has an A10 Output Assembly Option 002 present move the A10 assembly out of the way by following the procedure of Figure 8 11 How to Access A3 in Instruments Equipped with Option 002 2 To troubleshoot the Output Assembly a Turn to the schematic diagram Service Sheets 1through 4 ...

Page 112: ...h a period of 74 5 ns a frequency of 13 4 MHz If faulty check the cable which terminates at A2J9 Connect the oscilloscopeto A2TP1 The oscilloscope input should remain at 50R Connect a short BNC cable between the rear panel CLOCK SYNC OUTPUT and CLOCK SYNC INPUT The oscilloscope display should be the same as in step 3 If faulty check the cable which terminates at A2J10 Connect the oscilloscope inpu...

Page 113: ...s followed by detailed notes Normally it is only necessary to follow the simple steps and ignore the notes Refer to the notes when a step doesn t work quite right NOTE If the instrument htls Option 001 003 and or 005 these options can be restored after restoring the serial number Refer to the procedure following this one Procedure 1 Switch LINE to OFF and then back to ON After the instrument power...

Page 114: ... Serial Number Installation Enter 5 d i g i t serial number S N NOTE a The SPECIAL key is labeled in blue above the LAST key The END key b After keying in SHIFT SPECIAL the display should be is labeled in blue above the ENTER key I f l Special 0 f 2 Status Off f 4 Exit I 0 Last s t a t e recalled on Dower UD c After keying in 8 7 the display should be f l Special 87 f 2 Status Off f 4 Exit 0 Last ...

Page 115: ...opportunity to check the serial suffix before it is entered permanently into the instrument It cannot be changed once it has been entered The display should now read something like the following The example shows serial suffix56789 Serial Number Installation ISerial Number S N 56789 installed After the 10 second timeout the display will read I HP 8904A Main Selection Level If l Channel Confin 6 Pr...

Page 116: ...fl Channel Config 2 Press SHIFT PRESET Check that the serial suffix matches the number on the rear panel and check that the option being restored is not already present The display will look something like the following then after about 3 seconds it will time out The example shows an instrument with serial suffix 12345with Options 002 and 001 installed I HP 8904A Opts 02 01 IFirmware Revision 1838...

Page 117: ...performable the instrument will need its serial number entered or it is in need of repair Refer to How to Restore the Serial Number in a Replacement A2 Assembly 4 Locate the Codeword label for the option being restored The Codeword label is located on the right side of the chassis toward the rear of the instrument 5 Key in the Codeword then press ENTER Check the options from the display The displa...

Page 118: ...nd then back to ON After the instrument powers up the display should again read HP 89046 Main Selection Level fl Channel Config 7 Press SHIFT PRESET Confirm that the option has been restored The displaywill look something like following The example shows that Option 003 has been installed I HP 8904A Opts 02 01 03 1 Firmware Revision 18387A Serial No 12345 I 8 If another option is to be restored in...

Page 119: ...n Thesubstitute power supply must be floating if the solder iron has a grounded tip All soldering i s done with the HP8904A completely disconnected from the power line Do not apply too much heat to printed circuit connections when soldering The traces on the multilayer board are easily damaged Do not overstress the interconnecting cables Tools and Supplies Desoldering Tool Resistor 10 kR Needle No...

Page 120: ...F2 8 4 I L 6 81K TO EXTERNAL POWER SUPPLY 1901 88BB P I l 1 2 8 1 7 K 1 Figure 8 12 1 Partial Schematic of A2 Digital Assembly Showing the Battery Backup 4 Refer to Figures 8 12 1 and 8 12 3 for serial prefix 2942A and below or 8 12 4 for serial prefix a Temporarily solder one lead of a 10 kR resistor to the lead on the end of capacitor A2C5 Solder on the component side of the printed circuit boar...

Page 121: ... has serial prefix 2948A and above solder in the battery A2B1 HP 1420 0338 7 Remove the resistor and temporary backup connections on the A2 assembly 8 Re install the A2 assembly and all connectors 9 Place the instrument in its normal operating position Re insert the power cord and switch LINE 10 Press SHIFT PRESET The display should show the correct instrument serial number suffix for 11 Re instal...

Page 122: ...2 c Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 123: ...B1 Figure 8 12 3 Component Locator for A2 Digital Assembly Detailing the Battery Backup Serial Prefix 2948A and Above reu 15DEC89 Troubleshooting Memory Backup Battery 8 48 5 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 124: ...EVAC 15 10 48 6bHZ F 1 LINE NEUTRAL W 18 ASSEMBLY P 4 PART OF W 12 Figure 8 12 4 Line Voltage WiringHarness 8 48 6 Troubleshooting Memory Backup Battery rev 15DEC89 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 125: ...223 A 3 R224 8 1 R225 A 2 R226 A l R227 A l R228 A l R229 A l R230 A 1 8 1 8 1 8 1 A l A 1 A 1 A l A l A l A 1 A 1 A l All A 2 A 2 A 1 8 1 8 1 A 1 A 2 A 2 A 2 R232 A l R421 R233 A 3 R422 R300 8 2 R423 R301 8 2 R424 R400 D 2 R446 R401 D 3 R447 R402 D 3 R448 R404 D 2 R449 R405 D 2 R452 R406 D 2 R453 R407 D 2 R454 R408 0 3 R455 R409 D 3 R456 R410 D 3 R457 R411 D 3 R458 R412 8 3 R459 R413 8 3 R460 R41...

Page 126: ...D TRACE 1 w 51 1 I i 8 8 18 02 Vdo I I I RZ16 5I lK I IPOWER SUPPLY CONDITIONERS 0311 16VOCIF FILTERED 1svoc 12VOC 1ZVDC 1SVDC I I I I I I I I I I DAC LEVEL R211 758 1 r I I i1SVDC R217 I51 1K I e19 5l lK nZl L 8 1 U C222 1 1IU I it R225 3 16K J A I Y t I I m 1 1 C213 i 1 15VDC b 618 nS 4 l0nA CURRENT SOURCE 0318 f5 5 L 1bVDClF IFILTEREDI ss1 8 51 t7 V Artisan Technology Group Quality Instrumentat...

Page 127: ...3 D 3 D 3 8 3 B 3 8 3 8 3 8 3 8 3 8 3 B 3 A COMP R421 R422 R423 R424 R446 R447 R448 R449 R452 R453 R454 R455 R456 R457 R458 R459 R460 R461 R466 R467 R468 R469 R470 I I I W COMP C2 c 3 c 4 C5 C6 C8 c10 C11 c12 C13 C14 C28 C29 C30 C31 C33 C32 C34 C35 C36 C37 C38 C40 C41 C42 C43 C44 C45 C46 C47 C48 C50 C51 C64 C71 C72 c79 C82 C90 C93 C201 C202 C203 C204 I I 0 TPI I 1PS IPB I T P W B X V D 1 c 1 c 1 B...

Page 128: ...ES All serial prefixes On the A3 schematic 0 C230 Under SHARP CUTOFF ELLIPTIC change the value of 2230 to 1000pF rev 28MAR89 ss2 8 52 1 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 129: ...91 I n I 6 8 NIV9 kl31311dWV OIanV 4 81 I 33 IAS L I I 3IldIll3 JJOlfl3 dWHS dlBLL 4 ME3 T 9NIkl3111J 31901 N3AILlO ONV SAVl3kIk Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 130: ... 5 C6 C8 c10 c11 c12 C13 C14 C28 c29 C30 C31 C32 c33 c34 c35 C36 c37 C38 C40 C41 C42 c43 c44 c45 C46 c47 C48 C50 C51 C64 C71 C72 c79 C82 c90 c93 c201 c202 C203 C204 C205 R206 R207 R208 R209 R210 R211 R212 R213 R216 R217 R218 R219 R220 R221 R222 R223 R224 R225 R226 R227 R228 R229 R230 A 1 8 1 B l 8 1 A 1 A 1 A 1 A 1 A 1 A l A l A 1 A 1 A 1 A 2 A 2 A l 8 1 8 1 A l A 2 A 2 A 2 R232 A l R421 R233 A 3 ...

Page 131: ... CHANGES On the A3 schematic 0 R417 R422 Under FLOATING DRIVER AND ON OFF SWITCH change the value of R417 and R422 to 75K ohms rev 28MAR89 ss3 8 54 1 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 132: ...OUTPUT 1 OFF SHIFT WTPUT 2 OFF h MEASURE 8 Vpp I I AT2 3 I 13 I P I 0 K4 5voc P O K3 1 3 1 a 3 I I I I I I 12 dB ATTENUATOR 1 I I K4A SEE NOTE I FLOATING AMP DRIVER AND ON OFF SWITCH SEE NOTE ss4 I I I I I 24 dB ATTENUATOR I I I K2A I I 7 6 dB ATTENUATOR I I K6A SEE NOTE I I I I I I1 I1 I I I R70 1 I 7 968K I I I I I COUP OUT ss2 I I I 3 800K 3 808 p 15voc AOOITIONS TO I N I T I A L INSTRUMENT SET...

Page 133: ... C303 C304 C401 C402 C403 C404 C405 C406 C407 C408 C409 C410 C411 C412 C413 C421 C422 x y 8 1 B I A l 8 1 8 l 8 1 A 1 A l A l A l A l A l A 1 A l A 1 8 1 8 1 A l A l A l A 2 8 2 8 2 A 2 8 2 8 2 8 2 A 3 A 3 A 3 B 3 8 3 8 3 8 3 D 2 c 2 c 3 c 3 D 2 D 2 0 2 0 2 0 2 D 2 D 2 COMP COMP COMP 0402 0403 0404 0405 0406 0407 0408 R1 R2 R3 R4 R5 R9 R10 R40 R41 R42 R43 R44 R45 R47 R48 R49 R50 R51 R52 R53 R54 R5...

Page 134: ...ut 0 125 inch below J8 1 and label it J8 3 Connect a common ground symbol to J8 3 Write the following note directly under the circuit block Jumper J8 connects pins 1and 2 for all instruments except when equipped with option 006 Connect 58 pins 2 and 3 for option 006 equipped instruments ss4 8 56 1 reu 3ONOV89 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg c...

Page 135: ...TOR 11113 b U K 7 4 R I I 4 51 40 1 I 15voc R15 1 1 w I I II I FLOATINO OR ORWNDED AUDIO OUTPUT LIS2 rm OIll m I I I I I FLOATINO OR ORWNDED AUDIO OUTPUT I I A 7 OVERVOLTAGE DETECTOR t I lSWC ss3 2 L I I I 042b 71 I I I Rff I 2VOC ss4 8 57 V Isvoc 4 4 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 136: ...omponent locator on page 8 60 for the A6 High Power output assembly component locations 0 Use SS5 Opt 006 on page 8 61 for the A6 High Power Oustput assembly schematic information rev 15DEC89 ss5 8 59 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 137: ...Model 8904A ss5 8 60 Figure 8 1 7 Component Locator For S55 Service rev 15DEC89 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 138: ...P I 0 A3 A10 OUTPUT ASSEMBLY 1 I J480 I W18 II I I I 3 5 I Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 139: ...quipment Have surplus equipment taking up shelf space We ll give it a new home Learn more Visit us at artisantg com for more info on price quotes drivers technical specifications manuals and documentation Artisan Scientific Corporation dba Artisan Technology Group is not an affiliate representative or authorized distributor for any manufacturer listed herein We re here to make your life easier How...

Search results

Summary of Contents for HP 8904A

Reviews:

Related manuals for HP 8904A

Brands by name

Popular brands

HP HP 8904A, Service Manual

Search results

Summary of Contents for HP 8904A

Reviews:

Related manuals for HP 8904A

Brands by name

Popular brands