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Replaceable Parts
7970B/7970C
FIGURE
UNITS
&
PART
DESCRIPTION
PER
INDEX
NUMBER
2 3 4
5
ASSY
NO.
1
&14-
07970-61010
POWER REGULATOR PC ASSEMBLY A21
REF
-1
1854-0072
TRANSISTOR, NPN, Si, 2N3054 (Q12) .
1
-2
0340-0180
INSULATOR, transistor, mica.
1
-3
2360-0195
SCREW, no. 6-32, 0.312-inch, pozi
2
-4
2420-0001
NUT, hex, no. 6-32
2
-5
0683-3325
RESISTOR, fxd, 3.3k, 5%, 1/4W (R10, R20)
2
-6
1901-0040
DIODE, Si (CR9, CR10, CR11, CR12, CR13)
5
-7
1854-0063
TRANSISTOR, NPN, Si (Q7, Q13)
2
-8
1200-0077
INSULATOR, transistor.
1
-9
2360-0197
SCREW, no. 6-32, 0.375-inch, pozi
2
-10
2420-0001
NUT, hex, no. 6-32
2
-11
0683-1015
RESISTOR, fxd, 100 ohms, 5%, 1/4W (R12, R22) .
2
-12
0683-1025
RESISTOR, fxd, 1 k, 5%, 1/4W (R7, R9, R11, R21, R28, R29)
6
-13
1902-3171
DIODE, zener, Si (CR4, CR6) .
2
-14
1901-0025
DIODE, Si (CR3, CR5) .
2
-15
1820-0348
INTEGRATED CIRCUIT, type 844 (U41.
1
-16
1820-0256
INTEGRATED CIRCUIT (U5).
1
-17
0683-5125
RESISTOR, fxd, 5.1k, 5%,1/4W (R8, R19) .
2
-18
0686-0083
RESISTOR, fxd, 1.96k, 5%, 1/2W (R18).
1
-19
1853-0036
TRANSISTOR, PNP, Si, 2N3906 (08, Q9, Q18)
3
-20
1820-0439
INTEGRATED CIRCUIT, voltage regulator (Ul, U2, U3) .
3
-21
0757-0441
RESISTOR, fxd, 8.25k, 1%, 1/8W (R16).
1
-22
0698-3150
RESISTOR, fxd, 2.37k, 1%, 1/8W (R2, R26)
2
-23
1854-0039
TRANSISTOR, NPN, Si, EIA, 2N3053 (Ql, Q14)
2
-24
0340-0164
INSULATOR, transistor
1
-25
0757-0440
RESISTOR, fxd, 7.5k,l%,l/8W (R17)
1
-26
0698-3438
RESISTOR, fxd,147 ohms,1%,l/8W (R1, R25)
2
-27
0757-0438
RESISTOR, fxd, 5.11 k, 1%, 1/8W(R15, R30, R31, R35) .
4
-2'8
0757-0290
RESISTOR, fxd, 6.19k, 1%, 1/8W (R14).
1
-29
0757-1094
RESISTOR, fxd, 1,47k, 1%, 1/8W (R6)
1
-30
0757-0317
RESISTOR, fxd, 1.33k, 1%, 1/8W (R27).
1
-31
0180-0059
CAPACITOR, fxd, 10 J,tF, 25 Vdcw (C7).
1
-32
0160-3456
CAPACITOR, fxd, 0.001 J,tF, 10%,250 Vdcw (Cl, C3, C6)
3
-33
0683-6815
RESISTOR, fxd, 680 ohms, 5%, 1/4W (R24)
1
-34
0757-0279
RESISTOR, fxd, 3.16k, 1%, 1/8W (R5, R23)
2
-35
1884-0088
THYRISTOR, 2N3228 (CR1) .
1
-36
0340-0180
INSULATOR, transistor, mica.
1
-37
2360-0195
SCREW, no. 6-32, 0.312-inch, pozi
2
-38
2420-0001
NUT, hex, no. 6-32, 0.312-inch
2
-39
0698-0084
RESISTOR, fxd, 2.15k,l%, 1/8W (R3)
1
-40
081 ()'0172
CAPACITOR, fxd, 5 J,tF, 15 Vdcw (C5)
1
-41
2100-1773
RESISTOR, var,
WW,
1 k, 5%, 1W (R4)
1
6-40
Part 2
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