HP Visualize J5000 hp Visualize J5000, J7000 workstations service handbook (a4 - Page 109

Changing the Crystal Oscillator

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Changing the Crystal Oscillator NOTICE: This procedure does not apply to the Model J280. To install the new crystal oscillator, perform the following steps: 1. Orient the board as shown in . 2. Remove the Crystal Oscillator located at UT20 on the system board as shown in Figure 5-23, from the system board. 3. Install the new Crystal Oscillator into location UT20 on the system board. CAUTION: Match pin 1 on the crystal oscillator to pin 1 on the crystal oscillator socket at UT20. Failure to do so will cause system problems. DEMC() Different manufactures use different methods, for example, a black dot, square corner, notched corner etc., to designate pin 1 on the component. S3 Crystal Oscillator UT20 Pin 1 S2 S4 UH6 Processor Modules Figure 5-23. Crystal Oscillator Location Field Replaceable Units 5-27

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Field Replaceable Units
5–27
Changing the Crystal Oscillator
NOTICE:
This procedure does not apply to the Model J280.
To install the new crystal oscillator, perform the following steps:
1.
Orient the board as shown in .
2.
Remove the Crystal Oscillator
located at UT20 on the system board as shown in
Figure 5–23, from the system board.
3.
Install the new
Crystal Oscillator into location UT20 on the system board.
CAUTION:
Match pin 1 on the cr"stal oscillator to pin 1 on
the cr"stal oscillator socket at UT20. Failure to do
so °ill cause s"stem problems.
DEMC()
Different manufactures use different methods, for
e!ample, a black dot, square corner, notched corner
etc., to designate pin 1 on the component.
UH6
UT20
Crystal Oscillator
Processor Modules
Pin 1
S3
S4
S2
Figure 5–23.
Crystal Oscillator Location