HP 8560E Service Manual page 619

Display/Power Supply Section
Introduction
Introduction
The Display/Power Supply chapter consists of the following sections:
The A6 power supply in 8560 E-series and 8560 EC-series
WARNING
instruments, and the A6A1 high voltage assembly in 8560
E-series instruments, contain lethal voltages with lethal
currents in all areas. Use extreme care when servicing these
assemblies. Always disconnect the power cord from the
instrument before servicing these assemblies. Failure to follow
this precaution can represent a shock hazard which may result
in personal injury.
The voltage potential at A6A1W3, in 8560 E-series instruments,
is +9 kV. If the cable must be disconnected, always disconnect it
at the CRT with caution! Failure to properly discharge A6A1W3
may result in severe electrical shock to personnel and damage
to the instrument. See procedure 2 in Chapter 3.
Do not discharge the CRT second anode in 8560 E-series
instruments directly to ground, with the A6A1 high voltage
cable connected. This can damage the A17 CRT driver assembly.
Always discharge through a high resistance, such as a high
voltage probe.
Always use an isolation transformer when troubleshooting
either the A6 power supply or the A6A1 HV module. When using
an isolation transformer, connect a jumper between A6TP101
and A6TP301. This connects the circuit common to earth
ground. Remove this jumper when the isolation transformer is
not used.
618
A17 LCD Display (8560EC) ...........................................
A17 CRT Display (8560E)..............................................
A6 Power Supply ............................................................
page 619
page 624
page 638
Chapter 12