Asus repair. Clock. (Lesson 2)

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OUTLINE Clock Distribution Diagram Signal Description Repair Flow Chart Repair Technique

OUTLINE

Clock Distribution Diagram
Signal Description
Repair Flow Chart
Repair Technique

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CLOCK Distribution Diagram P5Q Deluxe

CLOCK Distribution Diagram

P5Q Deluxe

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CLOCK Distribution Diagram M4N78 AM

CLOCK Distribution Diagram

M4N78 AM

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CLOCK Distribution Diagram M4A79 DELUX

CLOCK Distribution Diagram

M4A79 DELUX

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Signal Description

Signal Description

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Signal Description Sometimes we can find BAT54AW near ICS. VRMPWRGD and

Signal Description

Sometimes we can find BAT54AW near ICS.
VRMPWRGD and SLP_S3# must

be 3V
Finally, CLKVCC offer 3V PWRGD to Clock Generator .
If Clock Generator doesn’t work, you must measure this PWRGD signal first.
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Repair Flow Chart

Repair Flow Chart

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Repair Technique-Visual Inspection 1 Visual Inspection to check Clock Generator and

Repair Technique-Visual Inspection

1

Visual Inspection to check Clock Generator and related small

components are not damaged.
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Repair Technique-Measure Vcc_CLK 2 Use Multi-Meter or Oscilloscope to measure Clock voltage 3.3V is ok.

Repair Technique-Measure Vcc_CLK

2

Use Multi-Meter or Oscilloscope to measure Clock voltage 3.3V

is ok.
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Repair Technique-Measure CLK X’TAL 3-1 3-2 Use Oscilloscope to measure Clock X’TAL 14.318Mhz is ok.

Repair Technique-Measure CLK X’TAL

3-1

3-2

Use Oscilloscope to measure Clock X’TAL 14.318Mhz is

ok.
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Repair Technique-Check Individual NG signal 4 Use Oscilloscope to measure every

Repair Technique-Check Individual NG signal

4

Use Oscilloscope to measure every individual CLK

signal. If find error please trace the circuit to find it’s connection.
If related RLC components are ok but CLK still is NG please try to change CLK generator at last.