TABLE 5-1. VOLTAGE AND RESISTANCE MEASUREMENTS (Continued)
Pin Numbers
10
11
12
13
14 Units
4
7
Part No.
5
6
8
9
Symbol
2
3
1
(B)
(E)
(C)
HIGH VOLTAGE CONTROL BOARD ASSEMBLY 1A4 (cont'd)
Ohms
1A4U1
7
15
8
2.5K
7
SN7255P
0
3 . 5 K 2.5K
+11.7
+11.7
+7.8 0
Volts
0
+11.7 0
0
Ohms
1A4U2
1.5K
0
MC78M20
12
Volts
+29.8
+19.9 0
1A4U3
4K
3K
3.5K
0
3K
0.3K
0.3K
Ohms
3.5K
7K
SN72723L 0
+7.4
+7.4
+11.6
+29.8
+7.4
Volts
0
+29.8
+12.6 0
0
HIGH VOLTAGE BOX ASSEMBLY 1A5
Ohms
15
1A5Q1
4
0
2N5988
+32.13
Volts
+32.6 0
15
4
Ohms
1A5Q2
2N5988
0
+32.0 +32.6 0
Volts
2.5K
00
Ohms
0.4K
2K
3.5K
6K
3.5K
1A5A2U2
SN7241L
2K
Do not attempt voltage measurements as high voltages are present.
1. Measurements taken with Fluke Model 8000A Differential Voltmeter and Triplett Model 630A Voltmeter
Note:
2. - COMMON lead attached to chassis GND
3. MODULATION SELECTOR switch in CW position