DRAFT 15
Operation and Service Manual
Receiving and Operating
c Attach INPUT and OUTPUT cables.
CAUTION Power out of the HP 8447E and power out of the HP 8447F power amp can
exceed 100 mW. This may be enough power to damage sensitive circuits
connected to the OUTPUT.
Operator Maintenance
Operator maintenance is limited to replacement of the front panel LINE switch
light, the A1 power supply fuse, and the rear panel fuse. Clean the cabinet using a
damp cloth only.
Fuses
To replace the rear panel fuse (F1), remove the rear panel fuse knob and replace
the fuse (see rear panel for value of F1).
To replace the A1 power supply (A1F1) fuse, turn the instrument on its top. Lift
the tilt stand and remove the bottom cover. Replace the fuse on the A1 Power
Supply board (see parts list for the value of A1F1).
WARNING: For continued protection against fire hazard replace line fuse only with same type and
rating ([0.5A/250V]). The use of other fuses or material is prohibited.
Lamp Replacement
To replace the front panel line switch lamp (DS1), proceed as follows:
a Disconnect cord from rear panel receptacle.
b Pull the white cover portion of this switch from the instrument and then remove the
lamp from inside the cover.
c Replace old lamp with a new lamp (see parts list for part number of DS1).
d Place white cover into switch receptacle.
e Align tab on white cover with socket and push in.
WARNING: No operator serviceable parts inside. Refer servicing to qualified personnel. To prevent
electrical shock, do not remove covers.
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