Philips Norelco SHAVER Series 9000 wet and dry electric shaver S9721-84 V-Track Precision Blades Contour Detect Technology SmartClean System PRO Digital User Interface with SmartClean System PRO and Aquatec Wet & Dry - Manual (Page 19)

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Storage
1 Store the shaver in the pouch supplied.
Note: We advise you to let the shaver dry before you store it in the pouch.
Replacement
Replacing the shaving heads
For maximum shaving performance, we advise you to replace the shaving
heads every two years.
Replacement reminder
The shaving unit symbol lights up to indicate that the shaving heads need to
be replaced. Replace damaged shaving heads right away.
Only replace the shaving heads with original SH90 Philips shaving heads.
1 The shaving unit symbol lights up continuously, the arrows flash
white and you hear a beep when you switch off the shaver.
2 Pull the shaving head holder off the bottom part of the shaving unit.
3 Place the retaining ring holder on the retaining ring (1), turn it
anticlockwise (2) and lift it off the shaving head (3).
Remove the retaining ring from the retaining ring holder and repeat this
process for the other retaining rings.
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