Partial Schematic Of A2 Ass'y - HP 4328A Operating And Service Manual

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Section VII
Model 4328A
7-2
CHANGE 1
Page 6-4, Table 6-2
Add A2CR205, HP Part No. 1901-0040, DIODE:SILICON.
Change A2R201 and A2R207 to HP Part
No~
0683-1545, R·FXD COMP 150k.Q 5'i1 1 • 4W.
Change A2R202 and A2R208 to HP Part No. 0683-1045, R.:FXD COMP 100k.Q 5%
1.
4W.
Page 6-5, Table 6-2
Delete A2R238.
Change A2R201 and A2R207 to 150k.Q.
Change A2R202 and A2R208 to 100k.Q.
Page 8-19, Figure 8-18
PHASE- SENSITIVE AMPUFIER ASS"Y I 04328-70221
Replace A2R238 with A2CR205 as shown
in partial schematic Figure 7-1.
~
IJ208
R232
LIN
~J
R234
---)
C21Z CR2
c
20~
Ff224
Figure 7-1. Partial Schematic of A2 Ass'y
CHANGE 2
Page 6-6, Table 6-2
Change A3 Board Ass'y, HP Part No. 04328-7034 to 04328-7023.
Service Note Board Ass'y 04328-7023 is interchangeable with Board Ass'y 04328-7043 . .
Page 6-7, Table 6-2
Delete A3CR32 1.
Page 6-8, Table 6-2
Change A3R342 to HP Part No . . 0683-3325, R:FXD COMP 3 3kr.l 5% 1/4W . .
Change A3R344 to HP Part No . . 0683-4325, R:FXD COMP 4 3kr.J 5% 1 4W.
Change A3R346 to HP Part No . . 0683-1045, RFXD COMP lOOkQ
5%
1i4W.
Page 8-17, Figure 8-14
Change a part of A3 schematic as follows
- - - - - - - -
R341
CR313
R34T
Figure 7-2. Partial Schematic of A3 Ass'y
Page 6-11, Table 6-2
Delete C2 IOO!J-F connected between Recorder output terminals . .
Page 8-19, Figure 8-18
Delete C2, 100{.lF capaCitor.
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