Introduction - HP 3320A Operating And Service Manual

Model 3320A/B
SECTION VIII
BACKDATING
Section VIII
8-1. INTRODUCTION.
8-2. This section contains backdating material which makes
this manual applicable to instruments with serial numbers
lower than the serial number listed on the title page. Each
change has been keyed in the text or illustration with a
dagger (t). This alerts the user to a change which may apply
to his instrument. If this manual is to be used with an
earlier instrument only, the changes which apply to that
instrument may be entered into the text where applicable.
Where component values in an instrument differ from the
~eplaceable
Parts List, yet are not listed in the backdating
section, the components should be replaced using the part
number in this manual.
8-3. INSTRUMENT SERIAL NUMBER SEQUENCE.
Designator Descri ption Part Number
A8C41 , C42, C43, C44 C: 0.01 IlF 100 V 0150-0093
A8C45 C: 230 pF 500 V 0160-2005
A8C46 C: 680 pF 300 V 0140-0208
A8R 62 R: fxd 1000 n 5% 0683-1025
A8R63 R: fxd 620 n 5% 0683-6215
A8R64, R68 R: fxd 47 n 5% 0683-4705
A8R65 R: fxd 470 n 5% 0683-4715
A8R66, R67, R69 R:fxd5100n5% 0683-5125
A8R70 R: fxd 560 n 5% 0683-5615
A8R71 R: fxd 51 n 5% 0683-5105
A8Q13,Q14 TSTR:SiPNP
1853~203
A8L7 Coil: RF 9140-0088
A8P1 Conn: RF 1250-1195
A8Tl TFMR: Toroid 9100-1362
c. In Table 6-1 make the following component changes:
Delete: AICll, MP29
Add: Al R58, R: fxd 10 kQ 1% 1/8 W 0757-0442
Change: Al R59 to R: fxd 10 kQ 1% 1/8 W 0757-0442
MP31 to 03320-60102 I each Assy: rear deck
d. In Figure 7-30 add the following circuitry to the A8
assembly:
To Junction
C33 and C37
R63
620
84. Changes are listed in instrument serial number order
(lower serial numbers first). However, when referring to the
changes for a particular instrument, begin with the latest
change and progress to the earliest change that applies to
the serial number in question. Table 8-1 lists the serial
numbers versus the changes.
8-5. CHANGE 1, FOR SERIAL NUMBERS 1121A-00110
AND BELOW (3320A), 1122A-00120 AND BELOW
(3320B).
8-6. Make the following changes:
a. In table 6-1 and Figures 7-12 and 7-17 delete A23 R3
and A23R4.
b. In Table 6-1 add the following components to the A8
assembly:
+15V
+15V
lC41
t:~
f
IK
1
~
,-,,-_ _
~NO
CONN
'r
Table 8-1. Serial Number Index.
3320A 33208
Instrument
Changes
Serial
Number
1121 A-0011 0 and below 1
1138A-00135 and below 4,5
1138A-00185 and below 7
1138A-00275 and below 9
Instrument Changes
Serial
Number
1122A-00120 and below
1
See Paragraph 8-7 2
See Paragraph 8-9
3
1139A-00200 and below 4
1139A-00250 and below 5
1139A-00340 and below 6
1139A-00540 and below 7
1139A-00590 and below
8
1319A~0690
and below 9
8-1