Electr Onic Com Ponents A Nd Val Ues; Measurement Dat A; Transistors; 01 Resistance Readings - Vivitar 283 Service Manual

~·
•
4.3
4.3.1
ELECTRONIC COMPONENTS AND VALUES
Automatic Electronic Flash
Model 283
Resistance values are listed in ohms, capacitance in microfarads. Except where otherwise indicated:
K
=
1000, M
=
1,000,000, pF
=
picoFarad.
MEASUREMENT DATA.
The measurements shown should be used only as a reference. Voltage and
resistance may vary between units, or as a result of variation in test equipment. All voltage and measure-
ments were taken with the Simpson Digital Multimeter, Model 464.
4.3.2 TRANSISTORS
c
C(+)
c
C(+)
E
E(+)
A. 01 2SB627
Resistance readings between leads. Lead with positive probe is marked (+). (Table 4-3)
Table 4-3. 01 Resistance Readings
OHMS (APPROX.)
LEADS
IN CIRCUIT OUT OF CIRCUIT
c
c
to
E(+)
150 1600
B
to
E
250 1700
E
to
B(+)
6 6
E
to B 50,000 50,000 E - Emitter
C · Collector
to
B(+)
6
6
B · Base
to B 50 1,000,000
O ·
Insulated
Voltage readings between main capacitor negative terminal and lead shown. Unit in operation. All read-
ings taken with Simpson Digital Multimeter, Model 464. Second column indicates approximate reading
when recycling. (Table 4-4)
Table 4-4. 01 Voltage Readings
VOL TS (APPROX.)
LEADS Operating
Recycling
Emitter
0 0
Collector
-5.0
-2.8V
Base
Fluctuating to +2.35V
+0.6V
Viv itar 37460598 (11/80)
21
B