8 Trouble Shooting
SAM4S ER-650 SERIES
8-3
8-3 LCD Display Problem
End
LCD Problem
Reset Signal
Ok?
Y
N
1. Refer to the Reset Part of System Problem
2. Check the Harness
Data Signal
Ok?
Control Line
Ok?
Y
1. Check the CPU F_LCD_CS1 (P1.0)
2. Check the CPU F_LCD_CS2 (P1.1)
3. Check the CPU LCD_RW (P7.4)
4. Check the LCD_DI (P8.2)
1. Check the Harness
2. Check the 74HC245 (U22)
3. Check the HC138 (U7) & LCD_CS Signal
4. Check the CPU /RD Signal
N
N
Back Light
Ok?
Y
Y
1. Check the CPU INTP1 (P8.3)
2. Check the TR A473, 2222 (14,16)
3. Check the LF33CV (U27)
N
Contrast
Ok?
Y
1. Check the VR1(10K)
2. Check the LCD Output VO
3. Check the Harness
4. Check & Replace the LCD Module
N
All manuals and user guides at all-guides.com
Summary of Contents for ER-650
Page 2: ...All manuals and user guides at all guides com...
Page 68: ...9 Block Diagram 9 2 SAM4S ER 650 SERIES Memo All manuals and user guides at all guides com...
Page 70: ...10 Wiring Diagram 10 2 SAM4S ER 650 SERIES Memo All manuals and user guides at all guides com...
Page 73: ...SAM4S ER 650 SERIES 11 3 11 2 MEMORY PART All manuals and user guides at all guides com...
Page 75: ...SAM4S ER 650 SERIES 11 5 11 4 FISCAL PART All manuals and user guides at all guides com...
Page 78: ...11 8 SAM4S ER 650 SERIES 11 7 KEY SCAN PART Y All manuals and user guides at all guides com...
Page 79: ...SAM4S ER 650 SERIES 11 9 11 8 LCD DISPLAY PART All manuals and user guides at all guides com...
Page 80: ...11 10 SAM4S ER 650 SERIES 11 9 PRINTER PART G G All manuals and user guides at all guides com...
Page 86: ...All manuals and user guides at all guides com a l l g u i d e s c o m...