ORTEC 420 - Page 18

6-4
Table 6.1 Typical DC Voltages
NOTES: ]. All voltages ore measured from ground with vtvm having Impedance of 10 megohms or greater.
2. All voltages ore dc values with no input signals.
3. Set all dials to read ICQ divisions.
4. Set DIFF./INT. switch to DIFF., and BIPOLAR/UNIPOLAR switch to BIPOLAR.
Pin No.
Location
Minimum
Maximum
A
+ 24 bus + 23.6
+ 24.0
B + 1 2 bus
+ 11.5
+ 12.0
C
- 12 bus
- 11.5
— 12.0
D — 24 bus
— 23.6
— 24.0
E Junction of R2 & R3
— 4.9
-5.1
F
Junction of R30 & R31
+ 4.9
+ 5.1
G
Ql-C
+ 11.4
+ 11.9
H
Q4-E
MM 7^/4 0
mm V
1
Junction of R21 & R22
-0.060
-0.080
J Q9-C + 11.3 + 11.8
K
Q12-C
+ 11.3 + 11.8
L
Q15-C
0 0
M Q16-C
+ 11.3 + 11.8
N
Q19-B
+ 1 7.2
+ 18.2
O
Q21-C
0 0
P
Q22-C
+ 0.37
+ 0.50
Q
Q23-E
0 0
C — Collector
B — Base
E — Emitter