HP 7970B Operating And Service Manual page 85

7970B/7970C
Replaceable Parts
FIGURE
UNITS
&
PART
DESCRIPTION
PER
INDEX
NUMBER
2 3 4 5
ASSY
NO.
1
6-15- 07970-61051
POWER DISTRIBUTION ASSEMBLY A20.
REF
-1 07970-60650 WIRING HARNESS, power supply (Wl).
1
-2
0400-0056 BUSHING, snap, nylon (AP)
1
-3 1400-0187
CLAMP, cable (AP) 1
-4 2190-0453 WASHER (AP)
1
-5
2680-0101 SCREW, no. 10-32, 0.438-inch, pozi (AP) 1
-6
2190·0034 WASHER, lock, helical (AP) 1
-7
07970-60442
HEAT DISSIPATOR ASSEMBLY, transistor (contains XQ1, XQ2, and XQ3) 1
-8
2680-0101 SCREW, no. 10-32, 0.438·inch, pozi (AP) 2
·9 2190-0034 WASHER, lock, helical (AP)
2
-10 1854-0063
TRANSISTOR, NPN, Si (Ql, Q2, Q3) 3
"
'~t
-11
0624-0062 SCREW, tapping, no. 6-20, 0.625-inch, pozi (AP)
2
~'
-
-12 0811-2180
RESISTOR, fxd, wW,12k, 5%, 5W (Rl, R21. 2
·13 2200-0141 SCREW, no. 4-40, 0.312-inch, pozi (AP) •
2
-14
2190-0071 WASHER, lock (AP).
2
-15 0160-2149 CLAMP, capacitor
3
-16
2360-0201 SCREW, no. 6-32, 0.500-inch, pozi (AP) . 1
-17 2420-0001 NUT, hex, no. 6-32 (AP)
1
-18 2200-0143 SCREW, no. 4-40, 0.375-inch, pozi (AP) .
2
-19 2190-0003
WASHER, lock, helical (AP) 2
-20
3050-0105 WASHER, brass (AP)
2
-21 0180-1970
CLAMP, capacitor 2
-22 2360-0201
SCREW, no. 6-32, 0.500-inch, pozi (AP) .
1
-23 2420-0001 NUT, hex, no. 6-32 (AP)
1
-24
2200-0143 SCREW, no. 4-40, 0.375-inch, pozi (AP) .
3
-25 2190-0003 WASHER, lock, helical (AP)
3
-26
3050-0105 WASHER, brass (AP)
3
-27 07970-61020
POWER DISTRIBUTION PC ASSEMBLY Al (see figure 6-16 for details)
1
·28 2360-0195 SCREW, no. 6-32, 0.312-inch, pozi (AP)
4
-29
2190-0085 WASHER, lock, helical (AP)
4
-30 3050-0227 WASHER, flat (AP) .
4
-31 07970-00280
CHASSIS, power distribution assembly
1
Part 2
6-43