Sinclair SP-300A Service Manual page 12

Disassembly Procedures
Disassembly Process
Operating Procedures / Photos
Disassemble front panel
Press the both buttons of front opanel, open the front
panel onwards and lift it upwards to remove the front
panel.
Disassemble filter subassembly and dust shelf
Hold the top handle of filter subassembly and pull it outwards,
take out the top both clasp, then take out the bottom
clasp to remove the filter subassembly.
Hold the twi handles of dust shelf and pull it outwards to remove
the dust shelf.
Disassemble filter subassembly and HIMOP grid
Hold the handle of grid and pull it outwards to remove
the HIMOP grid.
The filter subassembly is on the HIMOP grid and including
filter cotton and HIMOP+HEPA filter, tear the filter cotton
directly, then loose the two clasps of HIMOP+HEPA filter
to remove the HIMOP+HEPA filter.
front panel
button
handle
filter subassembly dust shelf
handle
HIMOP
grid
clasp