HP 721A Operating And Servicing Manual page 24

Sect. V Page 4
Model 721A
TABLE OF REPLACEABLE
PARTS
CIRCUIT
REF.
DESCRIPTION, MFR. * &MFR. DESIGNATION
<$
STOCK
NO.
TQ RS
R24ABCD
Resistor: wirewound, meter range
HP* 721A-26B 1 1
R25
Resistor: variable, 100 ohms
HP*
M-80 1
1
R26
Resistor: fixed, deposited carbon,
29,900 ohms ±1%, 1/2 W
NN*
0727-0185
1 1
R27
Resistor: fixed, deposited carbon,
9900 ohms ±1%, 1/2 W
NN*
0727-0156
1
1
SI
Switch, toggle: SPST
D*
3101-0001
1
1
S2
Short Circuit Switch Assembly
HP*
721A-19A 1
1
Switch, rotary: less components
W*
3100-0171
1
0
S3
Meter Range Switch Assembly
HP*
721A-19B 1
1
Switch, rotary: less components
W*
3100-0172
1
0
T1
Transformer, power
HP*
9100-0129
1
1
MISCELLANEOUS
Fuseholder
T*
1400-0008
1
1
Knob: VOLTAGE ADJUST
HP*
G-74D 1
0
Knob: METER RANGE,
SHORT CIRCUIT CONTROL
HP*
G-74BS 2
0
* 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.