HP 7970B Operating And Service Manual page 80

Replaceable Parts 7970B/7970C
FIGURE
UNITS
&
PART
DESCRIPTION
PER
INDEX
NUMBER
2 3 4 5
ASSV
NO.
1
6-14-
07970·61010 POWER REGULATOR PC ASSEMBLY A21 REF
-1
1854-0072 TRANSISTOR, NPN, Si, 2N3054 (012) .
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 (Rl0, R20) 2
·6 1901·0040 DIODE, Si (CR9, CR10, CR11, CR12, CR13, CR17)
6
·7 1854·0063 TRANSISTOR, NPN, Si (07, 013)
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, Rl1, 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 0683·2425
RESISTOR, fxd, 2.4k, 5%, 1/4W (R8, R19) . 2
-18
0686-2025 RESISTOR, fxd, 2k, 5%, 1/2W (R18l. 1
-19 1853·0036 TRANSISTOR, PNP, Si, 2N3906 (08, 018) .
2
-20 1820-0439 INTEGRATED CIRCUIT, voltage regulator (Ul, U2, U3) .
3
-21 1853-0027 TRANSISTOR, PNP, Si, 2N3245 (09)
1
-22 0698-3150 RESISTOR, fxd, 2.37k, 1%, 1/8W (R2, R26)
2
-23 1854·0039 TRANSISTOR, NPN, Si, EIA, 2N3053 (01, 014)
2
-24
1902·0049 DIODE, zener, 6.19V (CR16)
1
-25 1902-2303 DIODE, zener, 14.7V (CR15)
1
·26 0698-3438 RESISTOR, fxd,147 ohms, 1%,l/8W (Rl, R25)
2
-27 0757·0438 RESISTOR, fxd, 5.11 k, 1 %, 1/8W (R30, R31, R35)
3
·28 0757-0290
RESISTOR, fxd, 6.19k, 1%, 1/8W (R14, R15)
2
-29 0757-1094
RESISTOR, fxd, 1.4 7k, 1 %, 1/8W (R6)
1
-30
0757·0317 RESISTOR, fxd, 1.33k, 1%, 1/8W (R27).
1
·31 0180·0059 CAPACITOR, fxd, 10 ,uF, 25 Vdcw (C7).
1
·32 0160·3456 CAPACITOR, fxd, 0.001 ,uF,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, R16) .
3
-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, 1%,l/8W (R3)
1
·40 0180·0172 CAPACITOR, fxd, 5 ,uF, 15 Vdcw (C5)
1
-41 2100-1773 RESISTOR, var,
WW,
1 k, 5%, lW (R4)
1
6-40 Part 2