Jenway 7305 - Manual (Page 40)

SeCtion 9 – Maintenance and Service
9.1 RoUtine MAintenAnCe
Ensure the external surfaces of the unit are clean and free from dust. The sample area should always
be kept clean and any accidental spillage should be wiped away immediately. To give added protection
when not in use, the unit should be disconnected from the mains supply and covered with the optional
dust cover.
The only routine maintenance which maybe required is the replacement of the light source. The
replacement lamps are available from your local distributor (refer to section 8.4 for spare part codes). Only
genuine replacement lamps should be used. Similar lamps may have different filament configurations or
be wavelength restricted for domestic or commercial use and will give errors if used.
9.2 LAMP RePLACeMent
9.2.1 tungsten Halogen Lamp Replacement
This option is only valid for 7300 spectrophotometers.
Before replacing the lamp disconnect the unit from the mains supply and ensure the lamp is cool before
handling. Access to the tungsten halogen lamp can be gained via the lamp access panel located on the
rear of the instrument (refer to section 2.5).
1. Remove the screws holding the lamp access panel in place.
2. Withdraw the lamp access panel and unscrew the lamp bracket fixing screw.
3. Grasp and rotate the lamp bracket to gain access to the lamp.
4. Remove the old lamp from the holder. The lamp is a plug-in fit and should be removed by gently
easing it from the holder.
5. Carefully remove the replacement lamp from the packaging. Ensure that the glass portion of the lamp
is not touched as finger marks will damage the lamp resulting in a reduced performance. If accidental
damage occurs the surface of the lamp may be cleaned using propan-2-ol.
6. Insert the lamp into the holder, ensuring it is fully pushed home.
7. Rotate the lamp bracket and put back into operational position. Replace the lamp bracket fixing screw
and tighten.
8. Replace the lamp access panel and fix in place with the two screws.
9. Reconnect the power supply, turn on the unit and ensure that the lamp is illuminated after a few
seconds.
For further instructions refer to the service manual.
9.2.2 Xenon Lamp Module Replacement
This option is only valid for the 7305 spectrophotometers and must be done by an accredited service
engineer. Refer to section 9.3 for more details
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