Agilent Technologies 4418B Service Manual page 17

Power Reference Oscillator Level Adjustment............................ 3-6
Description.............................................................................. 3-6
Equipment .............................................................................. 3-8
Procedure ................................................................................ 3-8
Measurement Uncertainty..................................................... 3-10
Display Brightness and Contrast Adjustment ............................ 3-11
Introduction ............................................................................ 3-11
Procedure ................................................................................ 3-11
Theory of Operation ........................................................................... 1
Introduction................................................................................... 4-2
A1 Power Supply/Battery Charger .............................................. 4-3
A2 Processor Assembly ................................................................. 4-4
A3 Front Panel Assembly ............................................................. 4-7
A4 Comms Assembly .................................................................... 4-8
A5 Daughter Assembly ................................................................. 4-9
A6 Measurement Assembly .......................................................... 4-10
A8 Rechargeable Battery Assembly............................................. 4-12
Replaceable Parts ............................................................................... 1
Introduction................................................................................... 5-2
Assembly Part Numbers............................................................... 5-3
Power Supply Assembly Types .............................................. 5-5
Front Panel Connector Repair ..................................................... 5-6
Firmware Upgrades ...................................................................... 5-7
Downloading Firmware.......................................................... 5-7
Assembly and Disassembly Guidelines ....................................... 5-8
Removing the Power Meter Cover ......................................... 5-8
Removing the A1 Power Supply Assembly ........................... 5-9
Removing the A2 Processor Assembly................................... 5-10
Removing the A4 Comms Assembly ...................................... 5-11
Removing the A5 Daughter or A6 Measurement Assemblies5-12
Removing the A7 Fan Assembly ............................................ 5-13
Removing the Power Meter RAM Battery (BT1) .................. 5-14
Removing the A3 Front Panel Assembly............................... 5-15
Replacing the Front Panel Power Reference Cable Assembly5-18
Replacing the Rear Panel Power Sensor Cable Assemblies
(Options 002 and 003) ............................................................ 5-19
Replacing the Rear Panel Power Reference Cable Assembly
(Option 003) ............................................................................ 5-21
Replacing the Rear Panel Recorder Output Cable Assembly5-22
Replacing The Chassis Assembly .......................................... 5-23
Agilent E4418B/E4419B Service Guide Contents-3