2.4 Repair tips
Speaker unit test
Measure the DC resistance of the speaker unit to determine if the fault is caused
by a defective speaker unit.
It is recommended to measure on the terminals on the
speaker unit.
The speaker units must be disconnected from the product.
Speaker unit
Impedance
Nominal resistance
Limits
Tweeter
8 Ω
6.7 Ω
± 15%
Midrange
8 Ω
6.2 Ω
± 15%
Woofers *)
2 × 6 Ω
2 × 5.9 Ω
± 15%
*) Each Woofer has two coils.
If the speaker unit is outside the limits, it is defective and must be replaced.
Under normal conditions it is not necessary to replace the gaskets on the speaker
unit, unless they have been damaged by accident.
Sound test
It is possible to test each speaker unit/amplifier to check the sound quality, and
determine whether the devices are faulty or healthy. For this purpose use ServiceTool
and refer to the test section.
The
Sound Test
section features a sound generator which allows the user to send
a pure sound directly to the speaker unit. This feature makes troubleshooting or
testing more easy and targeted.
- Run ServiceTool.
- Be sure that ServiceTool is updated to the latest version. If not, upgrade and restart
ServiceTool.
- Scroll down to BeoLab section.
- Select
BeoLab 20
and click
Launch
.
- Click on the
PRODUCT
tab (if not already shown).
- Click
+
next to each item to expand the menus.
- Click
Test
->
Test Sound
(the information screen appears).
- Follow the procedure in Service Tool.
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