16
TPT1.2A LA
5. Service Modes, Error Codes and Fault Finding
5.3 Repair Flow Chart
1.No work/LED is off
Check if
power switch is
normal
No
Replace Power switch
Yes
Check
IR board CN001
pin1=0V,pin2=3.7V,
pin3=3V,pin4=2.85V
,pin5=5V,pin6
=3.3V
Check IR board
Yes
Check scaler board U102
pin1=14V,pin4=1.22V,
pin7=16V,pin8=5V,
No
Summary of Contents for 37PFL7422/79
Page 44: ...Scaler Board Layout Top Side Part 1 44 TPT1 2A LA 7 Circuit Diagrams and PWB Layouts ...
Page 45: ...Scaler Board Layout Top Side Part 2 45 TPT1 2A LA 7 Circuit Diagrams and PWB Layouts ...
Page 46: ...Scaler Board Layout Top Side Part 3 46 TPT1 2A LA 7 Circuit Diagrams and PWB Layouts ...
Page 47: ...Scaler Board Layout Top Side Part 4 47 TPT1 2A LA 7 Circuit Diagrams and PWB Layouts ...
Page 66: ...66 TPT1 2A LA 7 Circuit Diagrams and PWB Layouts Key Board Layout Bottom Side ...
Page 82: ...82 TPT1 2A LA 9 Circuit Descriptions Abbreviations List and IC Data Sheets ...
Page 83: ...83 TPT1 2A LA 9 Circuit Descriptions Abbreviations List and IC Data Sheets ...
Page 84: ...84 TPT1 2A LA 9 Circuit Descriptions Abbreviations List and IC Data Sheets ...
Page 85: ...85 TPT1 2A LA 9 Circuit Descriptions Abbreviations List and IC Data Sheets ...
Page 89: ...89 TPT1 2A LA 9 Circuit Descriptions Abbreviations List and IC Data Sheets Pin assignment ...