Sharp QD-101MM, Руководство по обслуживанию

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9.2.Sequence circuit of LCD panel
In QD-101MM, it is necessary to conform the power ON/OFF sequence of the LCD panel as
shown Fig.12.
Fig. 13 shows the panel sequence generation circuit.
The gate signal which has the same timing as the input signal in Fig. 12 is output by the RESET
IC of IC4 and IC5.
Fig. 13 Panel Sequence Generation Circuit
9.3.Handling the LCD panel
1. The LCD unit is assembled to very high density, do not attempt to disassemble it.
2. The polarizing plate is very easy to scratch, take extra care when handling it.
3. When cleaning the surface of the LCD panel, use absorbent cotton or soft cloth and
carefully wipe the surface.
4. The LCD panel will become discolored or stained if any moisture remains on the surface
for a long period of time.
5. The LCD panel is made of glass. If it is hit by any hard object or is dropped, it may
crack.Handle it very carefully.
6. CMOS LSI which is used in the LCD unit is very sensitive to static electricity. To prevent
damage to the LCD unit from static electricity it is necessary for all service technicians
to use a conductive mat and wrist strap to ground themselves when servicing the unit.
10.POWER CIRCUIT
The AC adaptor which is connected to QD-101MM supplies stable power to the unit, and
generates 5V power (V
CC
, V
CPU
, V
LCD
), V
PP
power, +10V power and the inverter circuit board
power(12V).
T1 T2
V
LCD
Signal
0 T1
0 T2
Fig. 12 Power ON/OFF sequence