Tektronix RFM150, Instruction Manual

Page: 160 / 278

Replacement Procedures
6–8 RFM 150 Instruction Manual
7. Replace speaker or speaker gasket (optional):
a. Remove the speaker and gasket.
b. Install the replacement gasket. Position the speaker on the
gasket.
8. Replace the keypads (optional):
a. Lift out the two keypads.
b. Install the replacement keypads in the front instrument casing,
using a dental pick or similar instrument to press the keypad
under the speaker housing.
9. Place the replacement Front Panel circuit board assembly in
position. Place the stiffener on top of the Front Panel circuit
board assembly. Install and partially tighten the 15 Front Panel
circuit board assembly screws. From the front of the instrument,
check the alignment of the keypads by pressing firmly on each
key. Make sure the keys are making contact and adjust if
necessary. Tighten all Front Panel circuit board assembly screws,
beginning with those around the speaker, to 4 in-lbs.
10. Solder the speaker and encoder switch leads to the replacement
Front Panel circuit board set, as shown in Figure 6–3.
11. Clean the clear filter on the instrument front case with a soft,
lint-free cloth dampened with a non-abrasive liquid glass cleaner.
12. Perform Instrument Assembly on page 6–15.
13. Perform the following steps from the Performance Check,
beginning on page 5–6:
Step 1, Step 2, and Steps 9 through 20.
Replacement Procedures
6–8 RFM 150 Instruction Manual
7. Replace speaker or speaker gasket (optional):
a. Remove the speaker and gasket.
b. Install the replacement gasket. Position the speaker on the
gasket.
8. Replace the keypads (optional):
a. Lift out the two keypads.
b. Install the replacement keypads in the front instrument casing,
using a dental pick or similar instrument to press the keypad
under the speaker housing.
9. Place the replacement Front Panel circuit board assembly in
position. Place the stiffener on top of the Front Panel circuit
board assembly. Install and partially tighten the 15 Front Panel
circuit board assembly screws. From the front of the instrument,
check the alignment of the keypads by pressing firmly on each
key. Make sure the keys are making contact and adjust if
necessary. Tighten all Front Panel circuit board assembly screws,
beginning with those around the speaker, to 4 in-lbs.
10. Solder the speaker and encoder switch leads to the replacement
Front Panel circuit board set, as shown in Figure 6–3.
11. Clean the clear filter on the instrument front case with a soft,
lint-free cloth dampened with a non-abrasive liquid glass cleaner.
12. Perform Instrument Assembly on page 6–15.
13. Perform the following steps from the Performance Check,
beginning on page 5–6:
Step 1, Step 2, and Steps 9 through 20.