Kenwood NX-300 Service Manual page 25

DISASSEMBLY FOR REPAIR /
a) Close the valve on the side of the pump.
b) Remove the pump from the hose.
c) Push the piston of the removed pump to the end.
d) Insert the pump into the hose.
e) Open the valve and pull the pump piston.
Repeat steps a) to e) until the meter needle indicates
10kPa (left side of meter). Disassemble and reassem-
ble the transceiver when you do not reach 10kPa even
if the step from a) to e) is repeated three times.
Note:
Do not push the piston with the pump inserted in the
hose because the meter needle of the water-resistant
inspection jig will break with excessive pressure.
6) When the meter needle reaches 10kPa (left side of me-
ter), close the valve on the side of the pump and observe
the movement of the meter needle.
If the change of the meter needle is within one scale
(0.2kPa) in 30 seconds, the transceiver will retain normal
water resistance.
It is not necessary to perform the "Leakage Location
Identifi cation" test on page 26 under these conditions.
If the change of the meter needle is more than one scale
(0.2kPa), water resistance is not adequate. Perform the
"Leakage Location Identifi cation" procedure on page 26.
Note:
If the valve is not closed, the pump piston is drawn by
the negative pressure of the transceiver and the meter
needle will move unexpectedly. Be sure to close the
valve, before beginning the observation.
7) If water resistance retention is confirmed, press the
black part of the hose adapter and remove the hose.
Then turn the hose adapter and remove it from the chas-
sis.
OK / 良好
0
5 5
10 10
Within one scale (0.2kPa)
一个刻度(0.2kPa)以内
hose adapter
hose
软管适配器
软管
Press the black part of
the hose adapter and
remove the hose.
按软管适配器的黑色部分，
取下软管。
维修拆卸
a) 关闭泵侧阀门。
b) 从软管中取出泵。
c) 将取出的泵的活塞推到底。
d) 将泵插入软管。
e) 打开阀门并拉泵的活塞。
重复步骤 a ) 至 e )，直至表针指示 10k P a ( 仪表左侧 )。
如果步骤 a ) 至 e ) 重复三次后表针仍无法达到 10k P a，
请拆卸并重新组装手持对讲机。
注意 :
请勿在将泵插入软管的状态下推动活塞，因为压力过大时
防水检验夹具的表针会断裂。
6) 当表针达到 10kPa( 仪表左侧 ) 时，关闭泵侧的阀门并观察
表针的移动。如果在 30 秒内表针的变动范围在一个刻度
(0.2kPa) 以内，表示手持对讲机会保持正常防水性能。
在这些条件下， 不需要进行第 26 页的 "泄漏位置确认" 测试。
如果表针的变化范围超过一个刻度 (0.2k P a )，则表示防水
性能不佳。
请进行第 26 页的"泄漏位置确认"操作。
注意 :
如果阀门未关闭，手持对讲机的负压会抽动泵的活塞，表
针会意外移动。开始观察之前，请务必关闭阀门。
NG / 不良
0
5 5
10 10
More than one scale (0.2kPa)
超过一个刻度(0.2kPa)
7) 如果防水性能的保持得到确认，请按软管适配器的黑色部
分，取下软管。
然后，转动软管适配器，将其从底座上取下。
hose
软管
Black part of the hose adapter
软管适配器的黑色部分
NX-300
25