Philips PM2519 - Page 65

4.2.10. Digital part test
CORRECT VOLTAGE NO
ON PIN1S OF 01700 ?
(SIGNAL 5}
SET INSTRUMENT
IN °C AND SHORT
CIRCUIT TP 1001
AND TP1002
FOR ONE SECOND
CHECK D1700
AND D1701
5.6V
Mow! SIGNAL 5
START TP 1013 P21
STOP TP 1013 P21
CLOCK TP1011 sci
GROUND TP 1012 LOGIC 0
NOTE: The SDA and SCL pin 3 and pin 2
of D1700 can be disconnected from
the other IC by bending out the
two pins,
ACTIVITY ON
PIN2 AND 3
OF 01700?
MEASURE THE FOLLOWING
SIGNATURES ON PIN2 D1700
FUNCTION SIGNATURE
SELECTOR
POSITION
LOGIC 1= P757
mw] > PRESET
pt, w]< 102
°C+dB/V
°C + AUTO/MAN
°C +DOWN
°c +uP
coma
C+
°C +ON/OFF 5902
eC # REL
CORRECT
SIGNATURES ?
CHECK SWITCHES
ON D1700
ST4429
840629
DISPLAY PART
NOTE: Measurement zero is the low socket.