Assembly Access; Introduction - HP 9122D Service Manual

ICHAPTERi
Assembly Access
I 5 I
Introduction
The following is additional information- which pertains to the 912 20/S and the 9121 D/S disc drives.
Top Cover Removal
To remove the top cover perform the following steps. Remove the AC 'power cord, then remove the two
cover securing screws on the rear of the unit. Depress the front panel power switch so that the cover will
clear the button. Tilt the rear of the cover upwards, and carefully remove the cover in a forward direction.
Assembly is performed in the reverse order, while depressing the power switch button through the front
panel hole.
LEVEL REFERENCE
DESIGNATOR
Al
.2 Cll ,12
.2 C19
.2
Cto
.2 C17,22,23
. 2 TEMP . .
.2 C31-46
.2
C4,5.8
.2 C25,26
.2
C9, 18,27 -30
.2 C24
.2 Ct ,20,21
.2
C2.3. 15,16
.2
C6
.2 C7
NOTE
When installing drives (for units having a S/N prefix of
2614A and above), the controller PCA or the disc drive cable (
P/N 09123-61611) ensure that the disc drive cable is placed
between the drive and the controller PCA. Also, all star
washers removed during disassembly must be reinstailed.
These steps will ensure that the 91220/S will conform to all
the relevent FCC/VDE requirements for electromagnetic
emission.
91220/5 PARTS LIST
PART DESCRIPTION
NUMBER
09122-69511
CONTROLLER PCA
0160-3622 C-F .IUF 100V
0160-4574
C-F 1000PF 10%
0160-4805 C-F 47PF 5% 100V
0160-4830
C-F 2200PF 10%
0160-4831 C-F 4700PF 10%
0160-4832 C-F .01UF 10%
0160-4835 C-F .1UF lOX 50V
0160-5098 C-F .22UF lOX
0160-5349 C-F 200PF 5';
0180-0210 C-F 3.3UF 15V
0180-0291 C-F 1 UF 35V 10';
0180-0692 C-F 220UF 35V AL
0180-3007 C-F .015F 25V AL
0180-3260 C-F 6800UF 50V
5-1