Sharp LL-T2010W (serv.man6) Service Manual ▷ View online
LL-T2010W
WAVE FORM
5 – 1
CHAPTER 5. WAVE FORM
Waveform measurement condition: Input each display pattern and check the waveform (timing chart).
Note:
Waveform figure
Waveform 1. XIN1 (IC15-21PIN)
Frequency: 24MHz
Display: Option
Waveform 2. XIN2 (X3's PIN on C111 side)
Frequency: 24MHz
Display: Option
Waveform 3. VSYNC (R74)
Frequency: 60Hz
Display: Option
Waveform No.
Measuring point
Name of measured waveform
Display pattern
1
IC15 21PIN
XIN1
Option
2
X3's PIN on C111 side
XIN2
Option
3
R74
VSYNC
Option
4
R76
HSYNC
Option
5
R94
LCD CLK
Option
6
R95
LCD DE
Option
7
IC17 29, 30, 41, 42PIN
LVDS CK
Option
8
RN1~RN12
LCD DATA
Pattern in every 2 lines of black and white
9
RN1~RN12
LCD DATA
Pattern in every 2 lines of black and white
10
IC8 side of C7, C11, C15
RGB OUT
Black-and-white, 16-gradation pattern
11
IC10, 11, 12: 2, 3, 5, 6, 8, 9, 11, 12,
39, 40, 42, 43, 45, 46, 48, 49PIN
39, 40, 42, 43, 45, 46, 48, 49PIN
SDRAM I/O DATA
Pattern in every 2 lines of black and white
12
IC10, 11, 12: 2, 3, 5, 6, 8, 9, 11, 12,
39, 40, 42, 43, 45, 46, 48, 49PIN
39, 40, 42, 43, 45, 46, 48, 49PIN
SDRAM I/O DATA
Pattern in every 2 lines of black and white
(1)
Use a probe of Tektonix P6139A.
(2)
Reception mode: VESA, 1600 x 1200
H: 75kHz V: 60Hz DOTCLK: 160MHz
Oscilloscope Tektronix TDS744B
Input signal
VESA 1600 x 1200
H: 75kHz V: 60Hz
DOTCLK: 160MHz
GND
2V/DIV, 20ns/DIV
2V/DIV, 20ns/DIV
GND
2V/DIV, 20ns/DIV
GND
LL-T2010W
WAVE FORM
5 – 2
Waveform 4. HSYNC (R76)
Frequency: 75kHz
Display: Option
Waveform 5. LCD CLK (R94)
Frequency: 63MHz
Display: Option
Waveform 6. LCDDE (R95)
Frequency: 75kHz
Display: Option
Waveform 7. LVDSCK (IC17, 29, 30, 41, 42PIN)
Frequency: 63Mhz
Display: Option
Waveform 8. LCDDATA (RN~RN12)
Display: Pattern in every 2 lines of black and white
2V/DIV, 5µs/DIV
GND
2V/DIV, 10ns/DIV
GND
2V/DIV, 5µs/DIV
GND
500mV/DIV, 10ns/DIV
GND
Enlarged
2V/DIV, 20ns/DIV
GND
GND
LL-T2010W
WAVE FORM
5 – 3
Waveform 9. LCDDATA (RN1~RN12)
Display: Pattern in every 2 lines of black and white
Waveform 10. RGB OUT
(IC8 side of C7, C11, C15)
Display: Black-and-white, 16-gradation pattern
Waveform 11. SDRAM I/O DATA
(IC10, 11, 12: 2, 3, 5, 6, 8, 9, 11, 12, 39, 40, 42, 43, 45,
46, 48, 49PIN)
Display: Pattern in every 2 lines of black and white
Waveform 12. SDRAM I/O DATA
(IC10, 11, 12: 2, 3, 5, 6, 8, 9, 11, 12, 39, 40, 42, 43, 45,
46, 48, 49PIN)
46, 48, 49PIN)
Display: Pattern in every 2 lines of black and white
500mV/DIV, 5µs/DIV
GND
2V/DIV, 50ns/DIV
2V/DIV, 2µs/DIV
GND
GND
Enlarged
Display
