Genius TVB-S201 PRO service manual Chapter, Troubleshooting Guide

Contents Service Manual TVB-S201 PROTable of Contents Block DiagramTesting Procedures INTRODUCTIONc. Block Diagram Chapter 1. INTRODUCTIONa. Hardware b. SoftwareChapter 2. Testing Procedures a. Testing flow chartA T Check X1 X’TAL signal T Check OSC signal T Check Y301 X’TAL signal T Check U1 CLK signal T ENDREPLACE X1,U22 REPLACE X2,U5,U1 REPLACE Y301,U301b. Check VCC +5V L34 PIN1c. Check REG2 Pin 2 Signal REG2.PINd. Check REG5 Pin 2 Signal REG5 PIN2e. Check REG3 Pin 2 Signal REG3 PIN2f. Check REG4 Pin 2 Signal REG4 PIN2g. Check X1,U22 Pin 26 X’TAL Signal U22 PIN26h. Check X2 Pin 3,U5 Pin 62,U1 Pin 41 OSC Signal U1 PIN41 U5 PIN62i. Check Y301 X’TAL Signal C322 PIN1j. Check U1 CLKSAA Signal U1 PIN58 U5 PIN66k. Check U1 RAMCLK Signal U1 PIN136Troubleshooting Guide ChapterChapter 4. Removal and Replacement Chapter 6. Tools Parts listDescription Parts number