MPK-DVF - Sony Movie Service Manual (repair manual). Page 7

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TMR-IF330R
2) Water leak check methods for other waterproofed lo-
    cations.
In addition to water leaks caused by damaged parts and loose
screws, there are also water leaks at other waterproofed loca-
tions which cannot be detected with a water leak test : therefore,
the hydraulic pressure test must be used.
     **Hydraulic pressure test
In this test, Marine Pack is immersed in a water tank called a
hydraulic pressure vessel, pressure is applied using compressed
air and checks are made for water leaks and the ability to with-
stand water pressure is tested.
Extreme pressure is applied to Marine Pack underwater.
Water leaks may occur when this pressure is first applied. In
such cases, the water leak check must be made using the hy-
draulic pressure test with a hydraulic pressure vessel.
4. Causes of Water Leaks (excluding parts damage)
Water leaks in openings
1) When the covers have been closed with sand, dirt and hair ad-
hered to the O-rings, O-ring grooves, housing O-ring contact
surface or waterproof packing.
2) When the cover is closed with an O-ring out of its groove or a
cord is caught in the cover.
3) When an O-ring is damaged or cracked (aging).
4) When there is a long scratch which crosses the housing O-ring
contact surface.
5) When a cover is not tightly closed due to a defective buckle.
• Water leaks at other waterproofed locations
6) When there are scratches on the surfaces of the parts which com-
press the O-rings.
7) When the Parts which compress are loose.
8) When tightening with sand, dirt and hair adhered to an O-ring or
part which compresses the O-ring.
9) When an O-ring has not been installed.
Causes 1)-5) and 9) above can be discovered relatively easily
using the water leak test described above.
5.  Causes of Water Leaks (excluding parts damage)
Water leaks in openings
1) When the covers have been closed with sand, dirt and hair ad-
hered to the O-rings, O-ring grooves, housing O-ring contact
surface or waterproof packing.
2) When the cover is closed with an O-ring out of its groove or a
cord is caught in the cover.
3) When an O-ring is damaged or cracked (aging).
4) When there is a long scratch which crosses the housing O-ring
contact surface.
5) When a cover is not tightly closed due to a defective buckle.
• Water leaks at other waterproofed locations
6) When there are scratches on the surfaces of the parts which com-
press the O-rings.
7) When the Parts which compress are loose.
8) When tightening with sand, dirt and hair adhered to an O-ring or
part which compresses the O-ring.
9) When an O-ring has not been installed.
Causes 1)-5) and 9) above can be discovered relatively easily
using the water leak test described above.
Compressor
Pressure gauge
Compressed air
Hydraulic pressure vessel
Marine Pack
Water
6.  Repair Location and Hydraulic Pressure Test
When a defect is discovered or a repair is made at a location
related to the waterproofness of Marine Pack, the hydraulic pres-
sure test must be performed. Repairs at locations which require
the hydraulic pressure test, and the hydraulic pressure test itself,
are performed at the factory : therefore, always check the type
of defect using the check list before making repairs.
Type of 
defect
Type of 
defect
Defect location and repair method
Defect location / symptom
Repair method
Hydraulic
pressure test
Hydraulic
pressure test
Improper
operation
Operational symptoms
when a video camera
recorder is installed
Operational check
during normal
connection
Unit defect (including
improper connector
connections)
Improper switch
operation
Operational
failure due to
sinking
Refer to the parts
damage item
Replace damaged
parts
Replace defective Parts
(including PC Boards, 
connectors, etc.)
Refer to the water
leak and sinking items.
Replace part
(repair housing when screws
are affected)
Necessary
Necessary
Light damage
Light damage
Damage
Damage
Damage
Damage, loss
Damage
Heavy damage
Parts damage
Heavy damage
Polish using waterproof 
sandpaper
Replace part
Replace part
Replace part
Replace part
Replace part
Replace part
Replace part
Replace part
Damage
Replace part
Replace part
Replace part (life : 2 years)
Scratch
Scratch, agin
Underwater microphone
Water leakage sensor box.
Determine cause using the hydraulic pressure test
Note :
 Parts with an 
*
 mark are incorporated into the right grip and cannot be detached so the right grip must be replaced as one set.
Camera mount
O-ring
Waterproofing O-ring
Exterior part
Deformation, damage
Front glass section
Grip area
Housing related
Rear glass section
Front glass
Eye cap
Rear glass
(Switch related)
REC START / STOP switch (button)*
ZOOM switch (button)*
PHOTO switch (button)*
AUTO FOCUS ON / OFF switch (button)
POWER switch (lever)
Damage or
coming off
Deformation,
scratch,
damage or
coming off
Lever
Button
Switch
Housing repair
(overhaul mounting section)
Video camera recorder
mounting base area
Repair the defect or replace
the part.
Sinking due
to water leak
Buckle
(including mounting screw)
Necessary
Necessary
Necessary
Necessary
Necessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Defective Marine Pack
Defective circuit
Unit repair
NG
OK
Improper contact
Replace connector
Defective switch
Replace micro switch
Open wiring
Replace
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