Rohde & Schwarz 1164.4391.03, Service Manual

Page: 139 / 254

R&S FSP Module Replacement
1164.4556.82 3.35 E-1
Installing the New Modules and Completing the Instrument
Mount the new Key-Probe board (50) with three countersunk screws (55) to mounting plate (60.)
Mount the new Vol./Phone Board (1040) with the nut of the volume control and one countersunk
screw (1055) to the mounting plate (1050). Mount Vol./Phone board (1040) with three countersunk
screws (1060) to mounting plate (60).
Connect the ribbon cable at motherboard-connector X80 and X81.
Move the complete mounting plate (60) carefully back in the instrument.
CAUTION
Make sure to route the cables properly.
Connect RF-cable W1 (295), (315) or (322) at the input of the RF Attenuator (20) or (30).
Screw three countersunk screws (70) to the instrument frame and two countersunk screws (70) to
the mounting plate (60).
Install the labelling panel (270).
Push the 2 front handles (420) on the instrument and mount them with the 4 screws (430).
Replace the volume control knob (Option R&S FSP-B3), if it was removed.
Push the tube (410) on the instrument and mount the 4 rear-panel feet (450).
Function Test
Connect a suitable keyboard to the keyboard jack.
Connect the instrument to the mains, switch on the instrument power switch and switch on the
instrument with the ON/STANDBY key
Press the "Ctrl" and "Esc" keys on the keyboard simultaneously; the Windows-XP taskbar appears at
the bottom of the screen.
Measure the output voltage at the probe connector (see Fig. 3-12 Pin assignments of PROBE
POWER connector).
Connect a keyboard to the instrument and test the function.
If the option R&S FSP-B3 (AF demodulator) is fitted, test the function of headphone connector and
volume control. Press the
MKR key, and press the MARKER DEMOD softkey . Noise can be heard in
the loudspeaker, the volume can be changed with the VOLUME knob at the front panel. Connect a
headphone to the AF OUTPUT at the front panel, the loudspeaker must be switched off and the
noise can be heard in the headphone.
Pin Signal
1 GND
2 -12.6 V
1
2 3
3 +15 V
Fig. 3-12 Pin assignments of PROBE POWER connector