I. Check Y301 X’TAL Signal, Service Manual

Service Manual

i. Check Y301 X’TAL Signal

Version 1.0

Page 12

Image 13

Contents

TVB-S201 PRO Service Manual Block Diagram Table of ContentsTesting Procedures INTRODUCTION Chapter 1. INTRODUCTION c. Block Diagrama. Hardware b. Software a. Testing flow chart Chapter 2. Testing Procedures Check Y301 X’TAL signal T Check U1 CLK signal T END A T Check X1 X’TAL signal T Check OSC signal TREPLACE X1,U22 REPLACE X2,U5,U1 REPLACE Y301,U301 L34 PIN1 b. Check VCC +5V REG2.PIN c. Check REG2 Pin 2 Signal REG5 PIN2 d. Check REG5 Pin 2 Signal REG3 PIN2 e. Check REG3 Pin 2 Signal REG4 PIN2 f. Check REG4 Pin 2 Signal U22 PIN26 g. Check X1,U22 Pin 26 X’TAL Signal U1 PIN41 U5 PIN62 h. Check X2 Pin 3,U5 Pin 62,U1 Pin 41 OSC Signal C322 PIN1 i. Check Y301 X’TAL Signal U1 PIN58 U5 PIN66 j. Check U1 CLKSAA Signal U1 PIN136 k. Check U1 RAMCLK Signal Chapter Troubleshooting Guide Chapter 4. Removal and Replacement Parts list Chapter 6. ToolsDescription Parts number