Rohde & Schwarz 1138.4000, Service Manual

Page: 119 / 213

Radio Unit R&S CRTU-RU Module Replacement
1140.0050.82 3.45 E-4
Replacing the Option MAC SPEECH CRTU-B6
(see chapter 5, spare part list, Current No. 580 and explosion drawing 1138.4000.01 D sheet 2 )
The option MAC SPEECH is installed in the module support as plug-in module. For replacement
proceed as follows:
Opening the instrument and removing the option MAC SPEECH
¾
Switch off the instrument, pull the mains plug and unscrew the rear-panel feet.
¾
Place the instrument onto the front carrying handles, push the tube upwards and take off.
¾
After unscrewing the two countersunk screws at the top left instrument frame slightly lift the cover at
the top of the instrument, slightly shift towards the right and lift off.
¾
Pull off all flat ribbon cables from the top of the option MAC SPEECH.
¾
Pull off all MMCX plug-in cables (using a pull-out tool
∗
) and the flat ribbon cables from the top of the
MAC SPEECH.
¾
Take out the module using the two levers on the right and left.
Installing the new option MAC SPEECH and completing the instrument
The casing is provided with ventilation holes on the right and left side. The instrument fan can generate
a strong cooling flow through these holes and the module. As the board does not consume very much
power, cover one of the two rows of holes towards the fan with a tape to reduce the air flow through the
MAC SPEECH and reserve the main cooling capacity for the other boards.
¾
Insert the new option MAC SPEECH into the instrument in the reverse order.
¾
Complete the instrument without causing damage to the cables.
¾
Connect the instrument to the mains.
¾
Connect the external keyboard to an USB connector of the CRTU Radio Unit.
¾
Switch on the CRTU Radio Unit.
Automatic module data adjustment
¾
Boot up within BootMagic

menu into “DOS OPSW / Service” or “Service / WCDMA”.
¾
During startup observe the display.
¾
When three BEEPs can be heard, press the MENU SELECT key.
¾
The version manager is started (see also chapter 4, Firmware update). The display includes the
menu item FIRMWARE UPDATE AFTER BOARD CHANGE.
¾
Press the softkey to the left of the above mentioned menu item.
The automatic module data adjustment is performed under software control, firmware updates for
microprocessors and programmable devices being performed as well. This may take a few minutes.
After the adjustment has been terminated, the operating software starts automatically and the CRTU
Radio Unit is ready for use and complies with the specifications.
∗
available in Service Kit CRTU-Z3 (1139.0509.02)