7-1
7.1
Introduction
This section contains information necessary to maintain, cal-
ibrate, and troubleshoot the Model 6512. Fuse replacement
and line voltage selection procedures are also included.
WARNING
The procedures included in this section
are intended for use only by qualified
service personnel. Do not perform these
procedures unless qualified to do so.
Many of the steps in this section may ex-
pose you to potentially lethal voltages
that could result in personal injury or
death if normal safety precautions are
not observed.
7.2
Line voltage selection
The Model 6512 may be operated from either 105-125V or
210-250V, 50 or 60Hz power sources. A special transformer
may be installed for 90-110V and 195- 235V ranges. The in-
strument was shipped from the factory set for an operating
voltage marked on the rear panel. To change the line voltage,
proceed as follows:
WARNING
Disconnect the Model 6512 from the
power line and all other sources before
removing the top cover.
1. Remove the screws securing the top cover to the rear
panel, and carefully lift the cover away from the instru-
ment.
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 7-1. (Switch positions
are marked on the mother board.)
3. Install a fuse consistent with the operating voltage, as
described in paragraph 7.3.
CAUTION
The correct fuse type must be used to
maintain proper instrument protection.
4. Mark the selected line voltage on the rear panel for fu-
ture reference (to avoid confusion, erase the old mark).
5. Replace the top cover, and connect the instrument to the
power line.
* Requires special factory configuration. Unit will be
appropriately marked when configured for 90-110V
or 195-235V operation.
Table 7-1
Line voltage selection (50-60Hz)
Line
voltage
Voltage selection
switch position
105-125V
210-250V
90-110V*
195-235V*
115V
230V
115V
230V
7
Maintenance
Summary of Contents for 6512
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