Tektronix RFM150, Instruction Manual

Page: 161 / 278

Replacement Procedures
RFM 150 Instruction Manual 6–9
Replacing the LCD Display Module
1. Perform Instrument Disassembly on page 6–1. This includes
turning off the instrument and making sure there is no connection
to AC power, RF input, or Interface Port.
2. Without removing any screws, lift the board set (consisting of the
Processor/Power Supply circuit board assembly and the Analog
Converter circuit board assembly) from the instrument housing
just enough to reach the cable that connects the board set to the
Front Panel circuit board assembly. Disconnect the cable.
3. Remove the board set from the instrument.
4. Place the board set on a static-free surface with the LCD Display
module facing up. Disconnect the dual-wire connector from J5 on
the Processor board. Figure 6–4 shows the LCD Display module
being removed from the Processor/Power Supply circuit board
assembly. The Analog Converter circuit board assembly (not
shown) is still connected to the Processor/Power Supply circuit
board assembly.
5. Remove the four screws (#10 Torx

with attached locking
washers) that hold the LCD Display module in place. Hold the
LCD Display module near the bottom left corner, and remove it
from the board set by working the pins loose. (The pins fit into a
connector that is mounted on the other side of the Processor/Pow-
er Supply circuit board assembly.)
6. Position the replacement LCD Display module on the board set,
inserting the pins into the Processor/Power Supply circuit board
assembly. Install the four screws that secure the LCD Display
module and tighten to 4 in-lbs.
Replacement Procedures
RFM 150 Instruction Manual 6–9
Replacing the LCD Display Module
1. Perform Instrument Disassembly on page 6–1. This includes
turning off the instrument and making sure there is no connection
to AC power, RF input, or Interface Port.
2. Without removing any screws, lift the board set (consisting of the
Processor/Power Supply circuit board assembly and the Analog
Converter circuit board assembly) from the instrument housing
just enough to reach the cable that connects the board set to the
Front Panel circuit board assembly. Disconnect the cable.
3. Remove the board set from the instrument.
4. Place the board set on a static-free surface with the LCD Display
module facing up. Disconnect the dual-wire connector from J5 on
the Processor board. Figure 6–4 shows the LCD Display module
being removed from the Processor/Power Supply circuit board
assembly. The Analog Converter circuit board assembly (not
shown) is still connected to the Processor/Power Supply circuit
board assembly.
5. Remove the four screws (#10 Torx

with attached locking
washers) that hold the LCD Display module in place. Hold the
LCD Display module near the bottom left corner, and remove it
from the board set by working the pins loose. (The pins fit into a
connector that is mounted on the other side of the Processor/Pow-
er Supply circuit board assembly.)
6. Position the replacement LCD Display module on the board set,
inserting the pins into the Processor/Power Supply circuit board
assembly. Install the four screws that secure the LCD Display
module and tighten to 4 in-lbs.