Tektronix DSA8300, Service Manual

Page: 81 / 138

Removal and Installation
Low-Voltage Power Supply You will need a T-15 Torx driver.
NOTE.
See also Checking the Power Supply Voltages in the Troubleshooting
section. (See page 4-55, Checking the Power Supply Voltages.)
1. To access the Low-Voltage Power Supply, remove these assemblies:
Trim (all) (See page 4-9.)
Bottom cover (See page 4-10.)
Left and Right covers (See page 4-10.)
Power Side board (See page 4-30.)
Disconnect the cable (Tektronix part number 174-4241-01) from J01 on
the Electrical Front-End board, allowing the clip that holds the cable to
remain in place.
CAUTION.
Do not remove the clip that holds the cable in place. To do so
can cause EMI issues.
2. Remove the low-voltage power supply as follows:
a. Set the instrument with the bottom on the work surface and the right side
facing you.
b. Disconnect J611 ribbon cable connector from the PC Processor board.
(See Figure 5-4.)
c. Remove the two T-15 Torx drive screws securing the low-voltage power
supply to the right-side chassis support.
d. Remove the three T-15 Torx drive screws securing the low-voltage power
supply to rear chassis.
e. Hold the low-voltage power supply and carefully slide the assembly out
of the mainframe.
3. To reinstall the power supply: Reverse the steps. Refer to the cable
connections table for information about where to connect cables. (See
Table 5-1.)
DSA8300 Digital Serial Analyzer and Modules Service Manual 4–33