Sennheiser HD 280 PRO Quick start guide
Disassembly/Assembly
HD 280 PROASSY 160518 R01
Mar 2018
Sennheiser electronic GmbH & Co. KG
Am Labor 1, 30900 Wedemark, Germany
www.sennheiser.com 1/3
Safety instructions
Unauthorized alterations and modifications are not permitted for safety and certification reasons. The
person who performs unauthorized modifications is liable for any resulting damage.
Comply with ESD regulations when working around components that are susceptible to electrostatic
discharge.
Modifications and repairs may only be performed by skilled personnel
(e.g. in accordance with VDE 1000 in Germany).
When repairing a device or replacing single components you have to use the original parts from the
device‘s current spare parts list. When other than the original parts are used the approval/ the
certification of the device becomes invalid!
Service and support
Special problems may be fixed by our Sennheiser service support center.
For this please use our Case Management System:
Sennheiser ServiceNet users can find additional solutions to any problems via the service support
database. To apply for ServiceNet access or if you have ServiceNet questions, please use this link:
https://www.se-servicenet.com/portal/contact.php?com=1&lan=2
Change log
Always check the safety and testing regulations that are currently valid for your country.
When performing work on the device, abide by the following regulations:
Repair-related (e.g. in accordance with VDE 0701 in Germany).
Device-related in accordance with IEC 62368.
Release Date Chapter/comment
ASSY 160518 May 2016 Basic issue
R01 Mar 21, 2018 Changed exploded view and spare part list.
4
HD 280 PRO
ASSY 160518 R01, Mar 2018, 2/4
1 Exploded view
Only the left/connecting cable side is displayed.
010
Acoustic unit
Cap
030
Notch
Strain relief
Lower Screw
(18 Ncm)
010
Item Designation
010 Padding set for HD 280 PRO
030 Connecting cable
See also:
The spare parts list of this device will be continuously updated in our Sennheiser ServiceNet.
(see page 3)
(see page 4)
(see page 4)
HD 280 PRO
ASSY 160518 R01, Mar 2018, 3/4
2 Replacing the connecting cable
1. Remove the earpad [010] of the left/connecting cable side as shown on page 4.
2. Remove the lower screw of the acoustic unit.
3. Remove the cap. If necessary, put a small slotted screwdriver into the two notches (see page 2)
and lift the cap.
4. Carefully unplug the connecting cable [030].
5. Replace the connecting cable and assemble in reverse order. Observe the correct cable routing .
Ensure that the cable will not damaged by the screw dome of the cap. Also ensure that the cable´s
kink protection and the connector PCB are completely even inserted. When you put the cap on the
acoustic unit, a clicking noise is hearable. Tighten the lower screw with a torque of 18 Ncm.
!
Red (Speaker left +)
Copper (Speaker left –)
Copper (Speaker right –)
Red (Speaker right +)
Speaker right
Speaker left
Speaker right
Speaker left
Bottom side
Top side
Red (right +)
White (left +)
Black (left –)
Blue (right –)
Cable connector
Long socket side
of the kink protection
White (left +)
Red (right +)
!
4
HD 280 PRO
ASSY 160518 R01, Mar 2018, 4/4
3 Replacing the earpads
1. Grasp the edge of the earpad [010] and peel it up and away from the cap.
2. Slide the new earpad onto the cap. The edge of the earpad must be tucked completely into the notch.
4 Replacing the headband padding
4.1 Removal
1. Remove the headband padding [010] as shown below.
4.2 Assembly
2. While sitting spread the headband apart thus placing it over your thighs.
3. The headband padding has a zip-lock. Put the new padding [010] around the headband by starting
to fix it firmly from the centre or the end of the headband position.
4. Ensure that the zip-lock of the headband padding is completely closed as shown above.
010
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