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SECTION 8
MAINTENANCE
8.1 INTRODUCTION
WARNING
This section contains information necessary to maintain,
calibrate, and troubleshoot the Model 595. Fuse replace- ~~~ ~~
ment and line voltage selection procedures are also
. __
Disconnect the Model 595 from the power line
and all other sources before removing the top
saver.
WARNING
The procedures included in this section are for
use only by qualified service personnel. Do not
perform these procedures unless qualified to do
so. hfany of the steps in this section may expose
you to potentially lethal voltages that could
result in personal injury or death if normal safety
precautions are not observed.
8.2 LINE FREQUENCY
SELECTION
1. Remove the screws securing the top cover to the rear
panel and carefully lift the cover away fioom the
instrument.
2. Locate the line voltage switch adjacent to the POWER
switch on the mother board. Place the switch in the cor-
rect position, as outlined in Table 8-l.
3. Install a fuse consistent with the operating voltage, as
described in paragraph 8.4.
CAUTION
The correct fuse type must be used to maintain
proper instrument protection.
The Model 595 may be operated at a line frequency of either
50 or 60 Hz. The instmmenfs frequency may. be set with
4. Mark the selected line voltage on the rear panel for future
the front panel line frequency program. XJ access the pro-
reference (to avoid confusion, erase any old marks).
gram and set the frequency, proceed as follows:
5. Replace the top cover and connect the instrument to the
power line.
1. Hold in the MENU button while pressing the POWER
button to turn on the instrument.
2. Press the MENU button until the message "Fr=" appears
on the display.
Table 8-l. Line Voltage 8election
(50-60Hz)
3. Press either v&age source ADJUST button to toggle fre-
quency between 50 and 6OI-Lz.
4. When the desired frequency is displayed, press SHIFT,
then EXlT to lock in frequency selection. Note: Line fre-
quency selection is stored in pe-ent
memory.
8.3 LINE VOLTAGE SELECTION
The Model 595 may be operated from either lO5-I25V or
2lO-25W 50 or 6OHz power sources. A special transformer
may be installed (at factory) for 90-1lOV and 195-235V
ranges. The instrument was shipped from the factory set
for an operating voltage marked on the rear panel. To
change the line voltage, proceed as follows.
Line Voltage
105 - l25v
210 - 250v
90-llov'
195 - 235v*
Voltage Selection
Switch Position
llov
220v
1lov
220v
fRequires special power transformer, installed at the
factoly.
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Table of Contents
Troubleshooting
