Kenwood NX-200 Service Manual page 27

DISASSEMBLY FOR REPAIR /
The meter needle will move down gradually due to air
leakage. Place the transceiver into the water before it
reaches 5kPa.
Air leakage can be confi rmed by air bubbles. When the
meter needle indicates 3 to 4kPa (right side of meter),
perform steps a) to e) in 3) above to increase the pres-
sure to approximately 10kPa.
Note:
If the transceiver is left under water when the meter
needle is 0kPa, water may be leaked inside the trans-
ceiver. Take the transceiver out of the water before the
meter needle reaches 3kPa. Because the meter needle
indicates 3kPa or more, pressurized air in the transceiver
is released in water as bubbles, so water cannot leaked
inside the transceiver.
5) Observe the transceiver while it is under water, while
paying attention to the meter needle value.
With the transceiver under water, air leaks if air bubbles
are produced continuously.
If air bubbles are not produced continuously, it is not a
leakage location.
Note:
If air bubbles come out of the speaker grill and are not
continuous, they are air that is collected in the front of
the speaker and do not indicate a leakage location.
6) Identify the component from which continuous air bub-
bles are released.
7) Remove the transceiver from the water, wipe off the wa-
ter and dry it completely.
Shake the transceiver to remove excess water from the
microphone and speaker grill.
Sound may be muffl ed or distorted if water remains in
the microphone and speaker grill.
Wipe off the battery terminal on the rear of the chassis.
Note:
Take special care because water collected between the
transceiver case and chassis may be leaked inside the
transceiver during disassembly and damage the trans-
ceiver components.
8) After the transceiver is dried completely, replace the
components with the leakage location identified while
paying attention to foreign matters.
Refer to page 29 for parts concerning the waterproof of
each leakage location.
9) Perform the "Water Resistance Confi rmation" on page
24 after reassembly.
■ Attaching the water-resistant sheet and black
sheet
Attach a new water-resistant sheet to the screw hole on
the rear of the chassis, then attach a new black sheet
onto the water-resistant sheet.
Note:
• Remove any adhesive trace from the location where
the water-resistant sheet and black sheet of the chas-
sis is attached before attaching a new water-resistant
sheet and black sheet to the screw hole.
• Attach the water-resistant sheet and black sheet to the
chassis fi rmly; failure to do so may allow water to pass
into the transceiver.
维修拆卸
表针会因空气泄漏而逐渐向下移动。应在表针达到 5kPa 之
前将手持对讲机放入水中。可通过气泡确认是否漏气。当
表针指示 3 到 4kPa( 仪表右侧 ) 时，执行上述 3) 中的步骤
a) 至 e)，将压力增大到约 10kPa。
注意 :
如果在表针为 0kPa 时将手持对讲机留在水下，水可能会泄
漏到手持对讲机内部。
应在表针达到 3kPa 之前从水中取出手持对讲机。因为当表
针指示 3kPa 或以上时，手持对讲机内的受压空气将以气泡
的形式释放到水中， 因此， 水无法泄漏到手持对讲机的内部。
5) 手持对讲机在水下时，对手持对讲机进行观察，同时注意
表针的数值。
手持对讲机在水下时，如果连续产生气泡，则表示漏气。
如果不连续产生气泡，则不是泄漏位置。
注意 :
如果气泡从扬声器网罩发出而且不连续，则这些气泡是扬
声器前部聚集的空气，而不代表泄漏位置。
6) 确定连续放出气泡的部件。
7) 从水中取出手持对讲机，擦掉水分并使其完全干燥。
晃动手持对讲机，排出麦克风和扬声器网罩中剩余的水分。
如果麦克风和扬声器网罩中有残留的水，声音可能会模糊
不清或失真。
擦干底座后面的电池端子。
注意 :
手持对讲机壳体和底座之间聚集的水可能泄漏到手持对讲
机的内部，损坏手持对讲机的部件，因此，应特别注意。
8) 手持对讲机完全干燥之后，更换已确定有泄漏位置的部件，
同时注意是否有异物。与各泄漏位置的防水有关的部分，
请参阅第 29 页。
9) 重新组装之后，执行第 24 页的"防水性能确认" 。
■安装防水片和黑色薄片
将新的防水片安装到底座后面的螺丝孔上，然后将新的黑
色薄片安装到防水片上。
注意 :
• 将新的防水片和黑色薄片安装到螺丝孔之前，应清除底
座的防水片和黑色薄片安装位置的胶痕。
• 将防水片和黑色薄片牢固安装到底座上，否则可能会使
水进入手持对讲机内。
NX-200
27