HP 5334B Service Manual page 120

CHANGE
(5) (2704A00147 thru 2804A00838)
Figure 8-23. P/O A1 Main Board HP-IB Schematic Block Diagram:
Change the SERIES number from 2804 to 2704.
Change the POWER-UP RESET circuit as shown in the following figure:
Figure 8-24. P/O A1 Main Board Timebase/Power Supply Blocks Schematic Diagram:
Change the SERIES number from 2804 to 2704.
Delete C103, C104, CR40, R142, R143, and R144 of the OVEN OSCILLATOR FINE ADJ circuit.
Delete the EFC and EFC GND input lines of the OVEN OSCILLATOR FINE ADJ circuit.
F R O M T O
/ -
POWER-UP RESET
-
/ - ,
POWER-UP RESET
- \
+5v +5v
+5V R292
Figure 8-26. P/O A1 Main Board Option 030 Channel C Block Schematic Diagram:
Change the SERIES number from 2804 to 2704.
Delete R331.
U292
SENSE -RESET
"RESIN
C T REF
CHANGE (6) (2704A00117 thru 2704A00146)
10K
Make this change for instruments that contain the Revision B, only, A1 Main Board Assembly.
Table 6-2. Replaceable Parts:
Delete AlR211,0698-3432, RESISTOR 26.1 % .125W F TC= e100.
-3:273
Figure
8-19.
HP 5334B Component Locator:
Delete R211
TO SHEET 6 U 7 0 2 ( 6 )
-1
TO SHEET 3 U19(39)-1
Figure 8-20. P/O A1 Main Board Input Amplifier Block Schematic Diagram:
Delete R211.
TO SHEET 6 U 7 0 2 ( 6 )
TO SHEET 3 U l Q ( 3 9 )
5334B
-
Service Manual
7-5
R E V . D R E V . C