Ic And Transistor Voltage Chart - Radio Shack TRC-447 Service Manual

IC's
Symbol
Pin Pin
No.
TX RX
1 5.9 5.9
2
3 5.4 5.4
4 6.0 6.0
5 4.9 4.9
6 4.9 4.9
7 4.9 4.9
IC102 8 6.0 6.0
9 2.6 2.6
10 0.9 0.9
11 2.7 2.7
12 -0.2 -0.2
13
14 0.0 0.0
15 0.0 0.0
16 1.9 1.9
1 2.1 2.1
2 0.0 0.0
3 2.4 2.4
4
5
6 2.2 2.2
7 0.0 0.0
IC301 8 134kHz Clock Pulse
9 0-5V Data Pulse
10 2.8 0.0
11 2.2 2.2
12
13
14 3.7 2.5
15 5.0 5.0
16 2.1 2.1
1 5.0 5.0
IC402 2 5.0 5.0
3 0.0 0.0
1 0.0 0.0
IC403 2 8.0 8.0
3 5.0 5.0
1 0.0 0.0
2 0.0 0.0
3 0.0 0.0
4 0.0 0.0
IC405
5 0.5 0.5
6 0.5 0.5
7 0.0 0.0
8 5.0 5.0

IC AND TRANSISTOR VOLTAGE CHART

Unit [V]
Mode
Comment
WX PA
5.9 5.9 OSC
NC
5.4 5.4 MIXER OUTPUT
6.0 6.0 VCC
4.9 4.9 LIMITER INPUT
4.9 4.9 DECOUPLING
4.9 4.9 DECOUPLING
6.0 6.0 QUADRATURE IN
2.6 2.6 AUDIO OUT
0.9 0.9 FILTER INPUT
2.7 2.7 FILTER OUTPUT
-0.2 -0.2 SQUELCH INPUT
NC
0/4.9 0.0 WX OFF/1mV
0.0 0.0 GND
1.9 1.9 RF INPUT
2.1 2.1 XIN
0.0 0.0 VSS
2.4 2.4 RPD
NC
NC
2.2 2.2 F-R
0.0 0.0 LE
CLK
DATA
0.0 0.0 LD
2.2 2.2 F-T
NC
NC
4.9 4.9 TPD
5.0 5.0 VDD
2.1 2.1 XOUT
5.0 5.0 VOUT
5.0 5.0 VIN
0.0 0.0 VSS
0.0 0.0 GND
8.0 8.0 IN
5.0 5.0 OUT
0.0 0.0 A0
0.0 0.0 A1
0.0 0.0 A2
0.0 0.0 GND
0.5 0.5 SDA
0.5 0.5 SCL
0.0 0.0 WP
5.0 5.0 VCC
Symbol
Pin
No.
TX RX
1 3.5V@UP/2.5V@NOM/1.3V@DOWN
2 4.5V@CH9/2.5V@NOR/0V@CH19
3 5V@MON ON / 0V@MON OFF
4 0-3V Alert Pulse @ Alert
5 2.5 2.5
6 0.0 0.0
7 5V@DUAL ON / 0V@DUAL OFF
8 5.0 0.0
9 0.0 0.0
10 5.0 0.0
11 4.9 4.9
12 0.0 0.0
13 Edge @ Rotary SW Change
14 Edge @ Rotary SW Change
15 WX ALERT PULSE @ ALERT
16 PLL Clock Output
17 5.0 5.0
18 PLL/EEPROM Data Output
19 PLL LE Output
20
IC401 21 0-4V Switching Pulse
22 0.0 0.0
23
24 0.0 0.0
25 5.0 5.0
26 5.0 5.0
27 0.0 0.0
28 0.0 0.0
29 5.0 5.0
30 EEPROM Clock Output
31 0-5V LED Switching Pulse
32 0-5V LED Switching Pulse
33 0-5V LED Switching Pulse
34 0-5V LED Switching Pulse
35 0-5V LED Switching Pulse
36 0-5V LED Switching Pulse
37 0.0 0.0
38 0-5V LED Switching Pulse
39 6.3V@WX LED ON/0V@OFF
40 0.0 2.0
41 2.8 0.0
42 0.0 0.0
43 5.0 5.0
44 5.0 5.0
1 2.5 2.5
2 2.5 2.5
3 2.1 2.1
IC104 4 2.1 2.1
5 0.0 0.0
6 2.2 2.2
7 2.2 2.2
— 46 —
Unit [V]
Mode
Comment
WX PA ALERT
PTT_CH
CH_MODE
MON
SAME
0.0 1.7 0.0 PA_WX
0.0 - 4.9 SC
DUAL
5.0 5.0 5.0 SQL
0.0 0.0 0.0 AVss
- - - TX/RX
4.9/0 4.9 0.0 WXMUTE
0.0 0.0 0.0 NOT USE
CHDN
CHUP
ALOUT
CLK
5.0 5.0 5.0 Vdd1
DATA
NC
LED-COM
0.0 0.0 0.0 Vpp
NC
0.0 0.0 0.0 GND
5.0 5.0 5.0 /RESET
5.0 5.0 5.0
0.0 0.0 0.0
0.0 0.0 0.0 Vss0
5.0 5.0 5.0 Vdd0
E_CLK
LED-C
LED-G
LED-A
LED-F
LED-B
LED-E
0.0 0.0 0.0 Vss1
LED_D
WXLED
2.0 0.0 0.0 RX_LED
2.8 2.8 - CBMUTE
8.0 8.0 - CB_MON
5.0 5.0 5.0 AVdd
5.0 5.0 5.0 AVref
2.5 2.5 - AGND
2.5 2.5 - TIP
2.1 2.1 - RING
2.1 2.1 - TRQ
0.0 0.0 - GND
2.2 2.2 - OSC IN
2.2 2.2 - OSC OUT
LE
X2
X1