Merryfair TUNE 139 YM A78 N2/NG Assembly Instruction

Assembly
Instruction
1
X3
X8
M8 X 30mm
M6 X 25mm
2
X8
M6 X 25mm
3
4
5 Only applicable for 139 model.
X2
M6 X20mm
User
Instructions
TUNE
A
Models
B
139 YM A78 N2/NG
138 YM A78 N2/NG
C
D
E
F
G
H
I
I
F
D
H
G
A B
Seat Height Adjustable
Flip up lever on right-side to raise or lower seat. Adjust such that your feet
are adequately supported on floor.
Multi-Position Tilt Lock
Recline to desired position, and turn lever anti-clockwise to lock. Turn lever
clockwise to release tilt-lock.
Armrest Height
Press the button and raise or lower the armrest. Adjust height to adequately
support elbows to take strain off shoulders.
Armpad Angle
Grasp armpads and rotate them inwards or outwards to adjust elbow
support to suite specific tasks. An inward position works during keyboard
use, while an outward position is recommended during mousing.
Armrest Depth
Grasp armpads and push them forwards and backwards to suite your arm
support.
Seat Depth Adjustment
Pull the lever under the right-side of the seat to adjust fore and aft position.
Lumbar Depth
Turn knobs on either side of back-frame to adjust depth of lumbar-
support cushion. A slack mesh-back is normal and may be
tensioned by adjusting the cushion forwards.
Backrest Height
Hold backrest by both sides and pull up, one step at a time, to
desired height. To lower backrest, pull it up till maximum height and
then, return it to lowest height to start again. Adjust height so that
the backrest curvature follows the curve of your back.
Headrest Height
(Only applicable for 139 model)
Adjust height by holding both sides of headrest and pull up or down to your
desired height.
E
C
F
C