Read Sharp LL-T1810A (serv.man3) Service Manual online
WAVE FORM 1 : XIN (22 pin of the IC34)
Frequency 7.987MHz
Display Screen : arbitrary
WAVE FORM 2 : VSYNC (9 pin, 18th pin of the IC14)
Frequency 75Hz
Display Screen : arbitrary
WAVE FORM 3 : HSYNC (8 pin, 17 pin of the IC14)
Frequency 80kHz
Display Screen : arbitrary
WAVE FORM 4 : MPU VSY (6 pin of the IC34)
Frequency 75Hz
Display Screen : arbitrary
WAVE FORM 5 : MPU HSY (7 pin of the IC34)
Frequency 80kHz
Display Screen : arbitrary
WAVE FORM 6 : LCD CLKA, CLKB (FL4, FL3)
Frequency 50MHz
Display Screen : arbitrary
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