Philips PM32671 Service Manual page 57

I
i I
4.4.
CHECKING PROCEDURE
0
STEP BJ ECTl V E INPUT VOLTAGE
4.1. Power
on
Start power supply Mains voltage
Power consumption
4.1 . I b Start POWER 24V (x7 - rear side)
SUPPLY
Power consumption
4.2. C R T display
4.2.1.
4.2.2.
FOCUS
TRACE ROTATION
4.2.3.
4.3. Vertical Y-axis
or
Square-wave signal 10kHz
4.3.1. Display modes
ampl. 100mV to A input
Square-wave signal IOkHz,
ampl. 200mV to A and B
input
Polarity inversion Square-wave signal to A (B)
4.3.2.
input
SETT I N GS
- Switch power on
10%
- Switch power on
- INTENS potentiometer
-
FOCUS potentiometer
-
Screwdriver adjustment
- Depress A
- Ampl/div. to 20mV
- Depress B
- Depress TRIG VIEW
- Depress CHOP
- Depress TRIG VIEW and CHOP S1
- Depress ALT
- Depress TRIG VIEW and ALT S1
-
Depress ADD
- AMPLIDIV switches to 50mV
Pull switch S4
s2 1 - Start a t selected mains voltage
-
Pilot lamp B5 lights up.
45W from ac
s2 1 - Starts a t dc supply voltages between
20V and 32V
- Pilot lamp B5 light ups.
37W from dc.
R12 Normal INTENS adjusting
R13 Trace sharpness adjusting
R14 Trace must be in parallel with horizontal
graticule lines; if necessary readjust
potentiometer TRACE ROTATION R14
Square-wave 10kHz 5 div. high must be
visible
Trace channel B visible
Trigger signal derived from A visible
Traces of A and B visible
Traces of A and B and TRIG VIEW
visible
Traces of A and B visible
Traces of A and B and TRIG VIEW
visible
Square-wave signal IOkHz, trace height
8 div. visible
Square-wave signal is inverted
I
I
MEASURING RESULTS
10%
I