SIGNA MR355 / SIGNA MR360
Service Manual
5856356-3EN Revision 5.0
Basic Service Documentation. Copyright General Electric Company.
Object ID: 00000018WIA3035FF20GYZ
Topic ID: id_13106278 Version: 1.10
Date: Dec 26, 2019 10:47:12 AM

Clock Splitter Replacement

Prerequisites

Table 1. Personnel requirements
Required persons	Preliminary requirements	Procedure	Finalization
1	Not Applicable	30 minutes	15 minutes

Table 2. Tools and test equipment
Item	Quantity	Effectivity	Part number	Manufacturer
Standard Tool	1	-	-	-

Table 3. Replacement parts
Item	Quantity	Effectivity	Part number	Manufacturer
Clock Splitter	1	-	Refer to	-

Table 4. Safety

Warning

ELECTROCUTION HAZARD!

DANGEROUS AND/OR FATAL VOLTAGES ARE PRESENT IN THE ENERGIZED CABINET.

Follow loto steps as given in first section of this document to disable and verify safe voltage levels.

About this task

Procedure

Notice

NEVER use the power button on the front to turn an ICN ON/OFF. The ICNs have software running on disk drives that can be corrupted if not shut down properly. Follow the procedure referenced below for removing power to ICN chassis. Failure to properly power down an ICN can result in premature ICN failure.

Notice

Follow the procedure mentioned below for removing power to ICN chassis. Failure to properly power down an ICN can result in premature ICN failure.

From the Common Service Desktop, turn off the ICN(s) (see ICN On/Off Procedure).

Turn off the System power. Refer to System Cabinet PDU Main Breaker LOTO Procedure.
Remove L Upper Front Cover and R Upper Front Cover. Refer to SC Cover Removal.
Perform the following steps as shown in the illustration below:
1. Disconnect the connectors from J2 and J3 of the clock splitter.
2. Loosen 2 screws and slide out the clock splitter.
3. Disconnect the connector from J1.
Figure 1. Clock Splitter Removal

CAUTION

Equipment Damage

The clock splitter installs with a Twinax cable (not a coaxial cable). The pins can easily break.

Align the twin marks before you connect this cable.

Install the new clock splitter by reverse order of removal.

Restore ISC by reverse order of removal.

Finalization

Restore the Power. Refer to System Cabinet PDU Main Breaker LOTO Procedure.
Turn on the ICNs per the ICN On/Off Procedure.
Note:
For the first 3 or 4 minutes, LEDs come on only at the rear of the ICN, next to the power cables. After 3 to 4 minutes, you will hear the ICN fans come on, and then the LED at the front of the ICN starts to flash.
Perform a TPS reset, and then do a check scan to make sure the system operates correctly.

Restore the Power. Refer to .