Radio Shack PRO-26 - Page 45

VOLTAGE CHARTS
TEST CONDITIONS
Measurement Conditions
Voltage supply is 6 V at battery terminal, unless other¬
wise specified.
TRANSISTOR Unit [V]
Ref. No. E c
B
Remarks
Q1
0 0/1.8 4.0/0
VC02 ON/OFF
Q2 0 0/1.8 4.0/0 VCOI ON/OFF
Q3
0.8/2.0
3.8 2 VC02 ON/OFF
Q4 0.8/2.0 3.8 1.5
VCOI ON/OFF
Q5 0
-1.5 -0.7
Q6 0
REF VCO 1,2 CONT V
Q7 1
1.4
Q8
0 0/0.6 4.0/0 MUTE ON/OFF
Q9 1.4 1.8
Q10 0
REF VC03 CONT V
Q11
1
1.3
Q12 3.9
1
AM, NO MOD 20 mV IN
Q13 0 AM, NO MOD 20 mV IN
Q14 1.2 3.9 1.8 WFM, NO MOD 100 mV IN
Q15 3.8 3.8/3.0 NFM, AM OFF/ON
Q16 3.8 3.8/3.0
AM OFF/ON
1.3
wm
Q18
3.8 3.8/3.0 WFM OFF/ON
Q19
1.3 1.8/0 WFM, NO MOD 100 mV IN
Q20
1.3 3.9 1.8/0 NFM, NO MOD 100 mV IN
Q21 0 0/0.6 3.8/0 AM ON
Q22 0
0/1.2
3.8/0
AM ON
Q501 0
3.7/0 0/0.6 POW. ON Reset
Q502 0 4.0/0 0/0.6
ICs Unit [V]
Ref. No.
Port V Remarks
IC1 1 0/3.8
Active high pulse
2 0/3.8
Active high pulse
3
3.8/0
Active low pulse
4 3.8/0
B1 ON/OFF
5 3.8/0
B2 ON/OFF
6 3.8/0
B3 ON/OFF
7
3.8/0
B4 ON/OFF
8
0 GND
9 0/3.8
Active high pulse
10
NC
11
NC
12 3.8/0
B7 ON/OFF
13
3.8/0
B6 ON/OFF
14
3.8/0
B5 ON/OFF
15 3.8/0
16
3.9
IC2
1
0/3,7
Active high pulse
2 0/3.7 Active high pulse
3
3.8/0 Active low pulse
4 3.8/0
VCOI ON/OFF
5 3.8/0
VC02 ON/OFF
6 3.8/0
IF1 ON/OFF
7 3.8/0
IF2 ON/OFF
8 0
GND
9 NC
10
NC
11 3.8/0
ATT ON/OFF
12 NC
13
NC
14 NC
15 3.8/0 Active low pulse
: 16 3.9
IC3
1
0.8
2 0
GND
3
0 GND
4
3
5 0 GND
6 3.2
IC4
1 1
2 0
GND
3
1.1