Philips SPENDEX 40 Maintenance Manual page 65

NATO CONFIDENTIAL
S P E N D E X 4 0 U A 8 2 5 1 / 0 0 A N D / O l L I M I T E D M A I N T E N A N C E M A N U A L
m a i n s / l i n e fi l t e r i s fi x e d i n t h e a p p a r a t u s ;
- Take the mains/line filter carefully out of the apparatus. See to
it that the connections with the line interface board do not come
loose;
- S w i t c h o n t h e e q u i p m e n t a n d w a i t u n t i l " * " a p p e a r s i n t h e
d i s p l a y ;
- Bring the equipment in the test state. The display shows
"TESTMODE";
- Connect the line connecting cable and connect on the telephone
connector pin "a" with pin "EB" and pin "b" with pin "GND";
- Key in test code 7. The display shows "VOC TEST";
- Go off hook;
- Press the § key. The LED lights up and in the display "SPEAK ! "
appears;
- Connect the pins "EB" (+) and "GND" (-) of the telephone connector
to a multimeter and adjust the desired level value with
potentiometer R18;
- Go on hook. The display shows "%V0C0M ";
- Press P key. The display shows "TESTMODE";
- G o o n / o f f h o o k . T h e d i s p l a y s h o w s " * " ;
- Switch off the equipment;
- Replace the mains/line filter into the apparatus. See to it that
the connections with the line interface board do not get jammed.
Then tighten again the 14 captive socket head screws.
9 9 2 2 1 5 4 1 3 4 3 1 7 - 1 1
NATO CONFIDENTIAL