Gaining Access To Parts; The Batteries; The Printed Wiring Board; Removing The Knobs - Philips PM 5101 Manual

14
Gaining access
to
parts
A. THE BATTERIES
•
- Remove the two screws at the rear. The rear pa nel then can be removed.
- R emove the connection wires from the battery.
- Remove the battery damp.
- Remove the batteries.
- Fit the new batteries in the apparatu s.
- Refit the battery d a mp .
- Connect the series-connection wire to the new batteries.
- Connect the two remaining connection wires to the new batteries .
(The batteries are provided with two different terminals for the positive
and negative poles, so that it is impossible to interchange the connec ­
tions.)
- Refit the rear panel.
B.
THE PRINTED WIRING BOARD
Remove the rear panel (see V-A).
The cabinet then can be removed . The printed wiring board (with all
components) is then accessible.
Tt
is provided with figures l . .. 8, corresponding to figures 1 . .. 8 in the circuit
diagram. These figures indicate the connection points between the parts
mounted on the chassis and the printed wiring board.
C. REMOVING THE KNOBS (see Fig. 3)
PEM1605
E 1 32 1
Fig. 3. Removing the knobs
- Remove cap A.
- Unscrew nut B and tap it slightly, while holding the knob.
- The knob then can be taken from the shaft.