Disassembly For Repair; 维修拆卸 - Kenwood NX-200 Service Manual

NX-200
1. Precautions for Waterproof
• Do not remove the black sheet from the reverse side of
the transceiver (refer to the illustration below). Removal
of this sheet decreases the waterproof effi ciency of the
transceiver and may cause malfunctions if water seeps
into the transceiver.
• The orange packing material on the reverse side of the
transceiver is important with respect to the waterproof
efficiency of the transceiver. Do not place stickers or
other materials on or around the packing material shown
in the fi gure, or on the reverse side of the battery pack.
Doing so will impair the waterproof efficiency of the
transceiver and may cause it to break down. Additionally,
in order to prevent damage to the packing material, do
not allow it to come in contact with foreign materials.
■ Water resistance maintenance of the transceiver
The transceiver satisfi es protection levels (IP standard)
IP67 specifi ed by international standard IEC 60529. IP indi-
cates a level of dust resistance and water resistance. The
fi rst characteristic numeral indicates "dust resistance", and
the second characteristic numeral indicates "water resis-
tance".
The overview of the IP67 requirements are provided be-
low:
• IP6* (Dust resistant type): Reduce pressure in the set
to a maximum of 2kPa to prevent entry of dust of 25 mi-
crons.
• IP*7 (Water immersion endurance): There is no ill effect
on performance or function when the unit is immersed
in water at a depth of 0.15 to 1m (0.49 to 3.28 feet) for
30 minutes. (In case of the test unit with a height less
than 850mm, the bottom part of test unit can be placed
1000mm below the surface of the water.)
Disassemble the transceiver with the facility or in the en-
vironment in which water resistance can be fully confi rmed.
Those who perform the procedure described here must
be experienced qualified engineers who understand the
contents of this service manual.
12

DISASSEMBLY FOR REPAIR /

维修拆卸
1. 防水注意事项
· 请勿拆下手持对讲机背面的黑色薄片 ( 参见下图 )。拆下
该薄片会降低手持对讲机的防水效能，如果有水渗入手持
对讲机内部，可能会引发故障。
· 手持对讲机背面的橙色包装材料对手持对讲机的防水效能
十分重要。请勿在图中所示的包装材料的上面或周围，或
者在电池的背面贴标签或其他材料。
否则可能削弱手持对讲机的防水效能，并可能导致手持对
讲机毁坏。此外，为防止包装材料的损坏，请勿使其接触
异物。
■保持手持对讲机的防水性能
本手持对讲机达到了 I E C 60529 国际标准规定的防护等级
(IP 标准 )IP67。IP 代表防尘和防水等级。第一位特征数字代
表"防尘" ，第二位特征数字代表"防水" 。
IP67 的总体要求如下 :
• I P6* ( 防尘型 ) : 将装置中的压力减小到最高 2k P a 以防止
25 微米的灰尘进入。
• IP*7( 耐水浸 ): 将装置浸没于 0.15 到 1m 深的水中 30 分钟
时，不会对性能或功能产生不良影响。( 如果试验装置的高
度小于 850mm，可将试验装置的底部置于水面下 1000mm。)
使用可完全确认防水的设备，或在可完全确认防水的环境
中拆卸手持对讲机。
执行此处所述操作的人员必须是有经验，有资质的工程技
术人员，并理解本维修手册的内容。