Fault Finding - Philips PM 5125 Manual

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- Set attenuator R2 fully clockwise.
- Set the frequency dial to position 50.
- Vary the frequency of the synchronising signal between 4900 Hz and
5100 Hz and check that the output frequency of the PM 5125 follows
these variations.
- Check that the distortion of the output signal remains less than 0.3%
during the synchronisation test.
Fault finding
To facilitate fault fi nding some d.c. voltages present at various places in
the circuit have been indicated in the circuit diagrams.
The indicated voltage levels serve only as a guide.
To replace parts the instrument should be switched off.
After replacing parts, it may be necesary to readjust the instrument
according to chapter XI "Checking and adjusting".
For gaining access to parts see chapter IX.
Note: In case of break -downs, the assistance of the PHILIPS Service
Organisation can always be called upon. Whenever the instrument
is to be forwarded to a PHILIPS Service Centre for repair, the
following should be observed:
- Provide the instrument with a label bearing full name and address of
the sender.
- Indicate as completely as possible the symptoms of the fault. `
- Carefully pack the instrument in the original packing or, if this is no
longer available, in a wooden crate.
- Forward the instrument to the address provided by your local
PHILIPS representative.