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Maintenance
7901A
Table 5-4. HP 7901A Disc Drive Chassis, Replaceable Parts
Reference
HP Part Number
Qty
Description
Mfr
Mfr Part Number
Designation
Code
CHASSIS PART5
Al
019u1-00u14
Ir.OICIlTOR ASSY:PC
28480
07901-60014
112
(;79CC-60054
SECTCR TRANSDUCER ASSY
28480
07900-60054
A3
lJ79(;1-60(;08
MOTOR CONTROL IISSY:PC
28480
07901-60008
A4
079L1-6ld)09
SERV AMP/REG ASSY:PC
28480
07901-60009
A4
07901-0:)011
SERve AMP/RE:G. ASSY, PC
2848C
07<)01-60011
A::>
07901-6u010
t'OTHER t30ARD ASSY:PC
28480
07901-60010
Ab
U7901-6JOO3
R/W PI<E:AMP ASSY:PC
28480
07901-60003
A7
079u1-6u004
R/w PREAMP ASSY:PC
28480
07901-60004
Ati
(;7901-6001~
AUX FUr.CTION ASSY:PC
28480
07QOI-60015
A9
L79u1-6COOo
E/I;CCOER ASSY:PC
28480
07901-60006
A 10
U7901-6uOO2
DRIVE CONTROL ASSY:PC
28480
07901-60002
All
07901-6(,005
!)ECTLR/CYL ASSY:PC
28480
07901-60005
A12
0790 i-6U007
I/O r-ULTIPLEXER ASSY:PC
28480
07901-60007
AU
C7901-tiOOll
A14
C79C1-b('011
Ale
07901-bUOB
TfRMII\ATION ASSY:PC.
28480
07901-60013
A17
07901-6J02!.l
UNIT SELECT SwITCH ASSY
2848C
07901-60028
til
3140-0761
1
MOTOR:INOUCTION SINGLE PHASE 2-POL E
08806
19HG
IlTl
142u-Cu81:!
3
bATTERY:NICt<.EL CADMIUM 1.25V
05397
fH 500
IH2
1420-(;088
HATTERY:NICKlL CADMIUM 1.25V
05397
CH 500
BTj
1420-0088
RATTtRY:NICKfL CAOMIUt-I 1.25V
05397
CH 500
C1
01tiO-2475
2
C:FXO AL tUO 52,000UF +75-10'; 25VOCw
56289
361)7182-008
L2
0180-247~
C:FXO AL ELECT 52,OOOUF +75-10% 25VOCw
56289
36D7182-008
CJ
0180-'<'476
1
C:FXO AL ELECT 38,OOOUF +75-10% 15VOCw
56289
3607162-D08
C4
0160-0762
2
C:fXO PAPER 5 UF
10%
370VAC RMS
56289
200P3405TPI-OCT
C~l
19("6-0u32
2
lHGDE ASSY:SINGLf PHASE F/w BRIDGE
28480
1906-0032
CR2
1<'06-0032
OIUOE: ASSY:SI"IGLE PHASE F/w BRIDGE
28480
1906-0032
OSI
G74CC-00026
1
ENCODER ASSY
28480
07900-60026
Fl
2 U0-0016
1
FUSE:0.6A 250V SLOw-flLOW
75915
313-600S
F2
2110-0365
1
FUSE:4A/250V SLOW-BLOW
71400
MOA-4 AMP
F3
2110-0342
1
FUSE:8 AMP AT 250V
71400
ABC-8
Hl
910U-3)0'3
1
FlLTfR:L1NE
28480
''1100-3303
Ll
0491-0060
2
SCLENOIO:96 OHM 24VOC
28480
04q}-0060
L2
0491-0060
SCLENOIO:96 OHM 24VOC
28480
0491-0060
L3
lJ790C-oC025
1
VELOC ITY TRANS COIL
28480
07900-60025
L4
07900-60024
1
MOTOR:LINEAR
28480
07900-60024
S 1
':'101-1395
2
SWITCH:PUSHBuTTON DPOT-DB
76854
53-67280-121/AIH
S.::
31ul-13'1~
SWITCH:PU5HBUTTON OPOT-OB
76854
53-67280-121/AIH
53
3101-1258
1
SwITCH:TOGGLE SPOTIPOwERI
28460
3101-1258
55
31u1-1617
2
SW1TCH:SENSITIVE SPOT O.IA 125 VAC
28480
3101-1617
!)6
3101-1617
SWITCH:SENSITIVE SPOT O.lA 125 VAC
26480
3101-1617
SI
3101-1608
1
SwITCH:SEr.SITIVF SPOT o .IA 125VAC
28460
3101-1601'1
SU
3101-10u7
1
5WITCH:SENSITIVE SPOT 5A 12.5/250 VAe
28480
3101-1607
!)<;
3101-0uTL;
1
SwITCH:SLlDE
7n27
G-126
Ttl1
036u-1689
1
BA~RIER
BLOCK:9 TERMO.175" o IA MTG
71765
354-11-09-001
Ttl2
13215-20001
1
8LOCK:GROUNO
28480
13215-20001
NOTE:
For further identification and illus-
trations of chassis parts, refer to
Section VI.
5-16
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