Sharp UP-3301 Service Manual page 20

5. Requirements for soldering circuit parts
To solder the following parts manually, follow the conditions described
below.
PARTS
PARTS CODE
NAME
RCRMZ7002RCZZ MAIN PWB:
Ceramic
oscillator
RCRMZ7004RCZZ MAIN PWB:
6. Note for handling of Touch panel
• The transparency of the touch panel is vitally important. Do not place
finger prints or moisture on the surface. When handling, use clean
gloves and masks.
• For handling, do not hold the transparent area, and do not hold the
heat seal connector section to assure reliability.
• Do not overlay touch panels. The edge may damage the surface.
• Do not put a heavy object on the touch panel.
• Do not apply strong shocks, and do not drop.
• When attaching the protection film, carefully check that no dirt exists.
• To clean dirt on the surface, use a dry, soft cloth or a cloth immersed
in ethyl alcohol.
• Check that the housing does not induce any stress to the touch
panel.
• Be careful not to touch the touch panel with tools.
• The heat seal section is easily disconnected. Be careful not to apply
any stress to the heat seal section when installing.
• The touch panel is provided with an air groove to make the external
and the internal air pressure equal to each other. If water or oil is put
around the air groove, it may penetrate inside. Be careful and keep
the air groove away from water and oil.
• Input is performed with fingers. Do not use hard objects to input
entries.
7. Note for handling the LCD assembly
• The LCD elements are made of glass. BE careful not to expose them
to a strong mechanical shock. Use extreme care not to break them.
• If the LCD element is broken and the liquid is seeps, do not lick it. If
the liquid comes in contact with your skin or clothes, immediately
clean with soap.
• Use the unit under the rated conditions to prevent against damage.
• Be careful not to drop water or other liquids on the display surface.
• The reflection plate and the polarizing plate can be easily scratched.
Be careful not to touch them with any hard object such as glass or
tweezers. Never hit, push, or rub the surface with hard objects.
• When installing the unit, be careful not to apply stress to the LCD
module. If excessive stress is applied an abnormal display or uneven
color may result.
CONDITIONS FOR
LOCATION
SOLDERING
270°/3sec.
X1 (8M)
270°/3sec.
X2 (7.37M)
UP-3301US SERVICE PRECAUTION
8. Cautions on handling connectors
When connecting or disconnecting the following connectors, follow the
procedures below.
1)
PARTS NAME PARTS CODE
QCNCW7207RC4J
FFC
CONNECTOR
QCNCW7183BH2F
FFC
CONNECTOR
• How to Connect or Disconnect the FFC Connector
(1) Open the slider to the unlock position
The slider will open only up to a fixed height (about 1.2mm). If you
used force to pull up the slider further, it may be damaged.
Slider
(2) Insert the FFC
Insert the FFC firmly untill the FFC hits the bottom of the connec-
tor's insulator.
FFC
FFC FFC
CONNECTOR
(3) Close the slider to the lock position
Insert the FFC and then push the slider downward.
FFC
Slider
– 18 –
LOCATION
MAIN PWB: CN6
TOUCH PWB: CN5
MAIN PWB: CN1
UNLOCK
1.2mm
FFC
CONNECTOR CONNECTOR
LOCK