HP 721A Operating And Servicing Manual page 23

Model 721A
00010-2 Sect. V Page 3
TABLE OF REPLACEABLE PARTS
CIRCUIT
REF.
DESCRIPTION, MFR. * & MFR. DESIGNATION
0
STOCK
NO.
TQ
RS
R1 Resistor: fixed, composition,
100, 000 ohms ±10%, 1/2 W B*
0687-1041 1 1
R2, 3
Resistor: fixed, composition,
330 ohms ±10%, 1/2 W B*
0687-3311 3 1
R4 Resistor: fixed, composition,
680 ohms ±10%, 1/2 W B*
0687-6811
2 1
R5 Resistor: fixed, composition,
150 ohms ±10%, 1/2 W B*
0687-1511
2
1
R6
Same as R4
R7 Resistor: fixed, composition,
47 ohms ±10%, 1/2 W B*
0687-4701
1 1
R8 Resistor: variable, composition,
linear taper, 5000 ohms ±30%, 1/3 W BO*
2100-0091
1 1
R9 Same as R2
RIO
Resistor: fixed, composition,
15,000 ohms ±10%, 1/2 W B*
0687-1531
1
1
R11ABCD Resistor: wirewound HP*
721A-26A 1 1
R12,13,14
These circuit references not assigned
R15
Resistor: fixed, composition,
560 ohms ±10%, 1/2 W
B*
0687-5611
3
1
R16 Resistor: fixed, composition,
1000 ohms ±10%, 1/2 W
B*
0687-1021 1
1
R17 Resistor: fixed, composition,
1-0,000 ohms ±10%, 1/2 W Optimum value
selected at factory. Average value shown B*
0687-1031 1 1
R18 Same as R15
R19 Resistor: variable, composition,
linear taper, 5000 ohms
BO*
2100-0011
1 1
R20
Same as R5
R21 Resistor: variable, composition,
linear taper, 2000 ohms ±30%, 1/3 W BO*
2100-0090
1
1
R22
Same as R15
R23 Resistor: fixed, composition,
22,000 ohms ±10%, 1/2 W '
B*
0687-2231 1
1
* See "List of Manufacturers Code Letters For Replaceable Parts Table".
TQ - Total quantity used in the instrument.
RS - Recommended spares for one year isolated service for one instrument.