Philips pm2521 - Page 70

74
4.2.3. V
.77
part
4.2.4.
V
~
part
NOTE
: THE
VOLTAGE
ON THE
N2 PCB CONNECTOR MUST
BE
MEASURED
WITH
A HIGH
IMPEDANCE
VOLTMETER (100MO)
IF THIS IS NOT POSSIBLE
,
TAKE ACCOUNT OF
THE SHUNTING
EFFECT (INPUT
IMPEDANCE PM2521
=
lOMfi
).
NOTE;
MEASUREMENT ZERO IS
THE
O-SOCKET OF
THE PM2521
ST342A
820204
SIGNAL 1
PiN
6
AND
7
OF THE RMS
CONVERTOR
A301
NOTE: OSCILLOSCOPE IN
POSITION AC
SIGNAL
2
TP12
NOTE : OSCILLOSCOPE IN
POSITION DC
SIGNAL
2^
NOTE:
OSCILLOSCOPE IN
POSITION AC
AMPLITUDE
NOT IMPORTANT,
'
LOOK ONLY
FOR DISTORTION
ST3426
820209
Fig. 47.
Waveforms
V
~
part