HP 8904A Opts | Agilent Technologies 2712A, 2948 specification

Model 8904A

Service

HOW TO RESTORE THE SERIAL NUMBER

IN A REPLACEMENTA2 DIGITAL ASSEMBLY

Description

If the A2 Digital Assembly has been replaced by a new or exchange assem,,;, the instrument’s serial number suffix will need to be entered into non-volatile memory (RAM). The suffix is the last five digits of the serial number. For example, the suffix of serial number 1234A56789 is 56789.

The serial suffix can be entered from the front-panel keyboard by the following procedure. Note, however, that the procedure will only work for an assembly coming from a Hewlett-Packard sales office or service center. If the instrument has lost the contents of its non-volatile memory (for example, if the backup battery fails), the serial number cannot be entered; the A2 Digital Assembly must first be replaced, then the serial number can be entered.

The procedure is written with simple steps 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 powers up, the display should read

I * HP 8904A Main Selection Level * I

f l Channel Confia.

NOTE

After about 3 minutes if no key has been pressed, the backlighting on the display will go off. This is normal. When another key is pressed the backlighting will go back on.

2.Press SHIFT PRESET. The display will look something like the following, then after about 3 seconds it will time out. (The example shows an instrument with Option 002 installed.) Check that the serial suffix is 00000.

HP 8904A Opts 02

Firmware Revision 18387A Serial No 00000

rev.15DEC89

Troubleshooting (Serial Numbers)

8-43

Image 112

Agilent Technologies 2712A, 2948 manual HP 8904A Opts

Contents

Agilent Technologies Innovating the HPWay Multifunction Synthesizer Copyright@ HEWLETT-PACKARD Company Regulatory Information Safety Considerations Safety Considerationsfor this Instrument Product Markings Contents Service cont’d Section Reu.200CT88 Introductionto this Section Replaceable Parts ListReference Designationsand Abbreviations Used in this Manual Replaceable Parts List Updating Manual Updates How to Order Access Nable 6-1.Reference DesignationsAbbreviations 1 ALC Abbreviations 2 Replaceable Parts Rev.01JUL91Description Number Code HPPart Description Number Mfr- Mfr. Part Number Code Fible 6-3.Replaceable PartsCAPACITOR-FXD22PF +-5% Poovdc CER 0+-30 Not Assigned Reference HP Part Description Designation Number Reference HP Part Description Designation Number Mfr Rev.1 7MAY88 Me 6-3. Replaceable PartsReference HP Part Designation Number DIODE-SWITCHING 80V 200MA 2NS DO45 Not Assigned Connector Spin M Post TypeCONNECTOR-RFSMC M PC 5 W H M CONNECTOR-RF SMC M PC W H M Reference Mfr Cable 6-3.Replaceable Parts HP Part DescriptionRESISTOR-TRMR 1K 10% C TOP-ADJ 17-TRN RESISTOR-TRMR20K 10% C TOP-ADJ 17-TRN Mfr. Part Number 0698-3430 Rev.17MAY88 Description Mfr Transistor Array 16-PIN Plstc DIP IC OP AMP Prcn 8-DIP-C PKGIC Instm Ampl CUR 10-DIP-P PKG IC OP AMP LOW-BIAS-H-IMPD 8-DIP4 PKG Nble 6-3. Replaceable Parts HPPart Description A10 L e 6-3. Replaceable Parts Ble 6-3.Replaceable Parts Miscellaneous PartsHPPart Reference HPPart Description Mfr Designation Number Code Deck Assy Rnftsund Plstem DOME-HD .125DIARIVET-BUND PL-STEM DOME-HD .125DIA RIVET-BUND Plstem Domehd .125DIA PANEL, Front AY Not SepararetlyreplaceableKeypad Punched Shield Display Reference HPPart Designation Number QW. Description Qty.Description Designation Code Mfrm Mfr. Part Number Code Lbble 6-3. Replaceable PartsOrder by Description IZZ-9 Main Deck Assembly Top, 2923A and above Model 8904A Main Deck Assembly Bottom Main Deck Assembly Bottom, Option 006 2948A and above Reu.30NOV89 Front Panel Assembly, 2923A and above Rent Panel Assembly, Option 006 2948A and above Reu.30NOV89 Rear Panel Assembly Rear Panel Assembly, Option 005 2948A and above Rev.30N0 Covers, Labels, and ROMs Rev.ZSSEP88 Output Cables 1 Output Cables, Option 005 29484 and above 2 Rev.30N0V89 Table of Contents Rev.15DEC89 Option ConversionsNumber 2942A and below Titled Hardware Modifications Instrument ModificationsRevision 22987A with HP 08904-8701 0 as A2U12 Modification Procedure FRONT-TO-REAR-PANELOUTPUT Conversion DescriptionParts Required Tools Required Fl Channel Config Operation Verification Description REAR-TO-FRONT-PANELOUTPUT ConversionRev.15DEC89 Rear-to-Front-Panel Output Conversion Fl Channel Config Ront Panel Output Hardware Output Cable Routing ALL Options Rev.01JUL91 Firmware UpdatesBardware Modifications Firmware Updates A2U12 and A2U13Different function Modification for Possible Ground Wire Shock Hazard Serial Prefix 2737A and below Parts Location Shown with Power Supply Removed Firmware Updates/Hardware Modifications Ground Wire Wrapping Firmware Updates/Hardware Modifications Parts List Modification for Output Overvoltage Protection ImprovementHPPartNumber ~~ Qty Description Fixed Resistor, 261 or Modification for Potential Power Supply Short Cabinet Parts Color Change 1. Modificationfor Front Panel Assembly Reu.15DEC89 Firmware UpdatesIHardwareModifications Removing the Front Panel Installingthe Front Panel Dont-Panel Assembly, 2923A and above A3 or A10 Output Assembly Phase Synchronization Option Section Service Before Applying Power Safety ConsiderationsHOW the Section is Organized Iwarning Service TOOLS, HELPS, and Information Schematic Symbology and Schematic Diagram Notes Schematic Diagram Notes 1 Pin of socket Schematic Diagram Notes 2 Schematic Diagram Notes 3 Llzble 8-1.Schematic Diagram Notes 4 Digital Symbology Reference Information Schematic Diagram Notes 5 Combinational Logic Symbols and Functions Digital Symbology Reference Information Schematic Diagram Notes 6 Schematic Diagram Notes 7 Only with D-type flip-flops Gate and Dependency-Binary Llable 8-1.Schematic Diagram Notes 8of Miscellaneous Service Schematic Diagram Notes 9 Schematic Diagram Notes 10 Active Levels Schematic Diagram Notes 11 Enable What the Multifunction Synthesizer Can Do Principles of Operation OverallHow Waveforms Are Generated Channel a Generating Staircases in the Phase Accumulator Output of the Phase Adder for P=O, 1, Further Digital Waveform Processing with Options Pulse Phase @PHASE FreouencyFreouency SUM Pulse Level Interrelationshipof the Circuit Assemblies Analog Waveform ProcessingReu.15DEC89 Principles of Operation Overall Synthesizer PASSY- t A2 Digital Assembly General Digital-to-Analog Converter Service Sheet A3 Output Assembly Service Sheets 1 through GeneralTrack-and-Hold Circuit Service Sheet Simplified Diagram of the Sampler Drive 10.Simplified Diagram of the Sampler Amplifier Low-Pass Filters Service Sheet Audio Amplifier Service SheetSine X/X CompensationService Sheet 12, and 24 dB Attenuators Service Sheet Floating Output Amplifier Service Sheet Floating Amplifier Driver and On/Off Switch Service SheetOvervoltage Protectionand Output Circuits Service Sheet Troubleshooting General Rev.15DEC89 Troubleshooting General Procedure A2 Digital Assembly to A3 or A10 Output Assembly InterfaceEquipment 1. How to Access A3 in Instruments Equipped with Option Troubleshooting Digital/Output Interface Serial Prefix Fl Channel Config Period Fl Channel Config Pin Frequency Hz A3/A10 Connection Function A3 Key Sequence A10 Key SequenceIC Pin Level F3 Memory Map Access Clocks A10 PinJ1 and J5 Miscellaneous Control A2 Digital Assembly to A1 Keyboard Assembly Interface Fl Keyboard Check AMPTD, Wave Form Pin Key Pressed Response lTL F3 Memory Map Access Key Sequence Annunciator Status IC on A2 Pin Level lTL A2 Digital Assembly to A5 Display Assembly Interface Description A3 or A10 Output Assembly Phase Synchronizationoption Troubleshooting Phase Synchronization HP 8904A Opts After keying in 8 7, the display should be IFirmware Revision 18387A Serial No IFirmware Revision 18387A Serial No HP 8904A Opts 02/01 After keying in 4 8, the display should be Begin again at step HOW to Replace the Memory Backup Battery Troubleshooting Memory Backup Battery 48.1Tools and Supplies Parts Troubleshooting Memory Backup Battery Rev.15DEC89 Troubleshooting Memory Backup Battery 48.3Page N a 12.4. Line Voltage Wiring Harness A3 Component Coordinates 1 R300 Ipower Supply Conditioners L0nA Current Source A3 Component Coordinates 2 Comp Ss2 On the A3 schematicRev.28MAR89 I813IldIll3 JJOlfl3 dWHS 31901 N3AILlO ONV 15.Service Sheet Information Component Locator Changes Rev.28MAR89 54.1 Aooitions I T I a L Instrument Settings Ampto Instrument Settings MeasureCoup OUT K2A + a Component Coordinates 1 Ss4 56.1 Ss4 A6 Schematic and Component locator Ss5 Output Assembly 0 A3/A10