Model 8640B TM 9-4935-601-14-7&P
CHANGE 14
Page 6-7, Table 6-3:
Change A3A4R1 to 2100-3054 RESISTOR; VAR; TRMR 50K OHM 10% C SIDE ADJ.
Delete A3A4R6.
Service Sheet 5 (schematic):
Change A3A4R1 to 50K.
Delete A3A4R6 and connect A3A4R1 to PC board connector pin 5.
CHANGE 15
NOTE
See paragraph 7-90 for recommended instrument modifications.
Page 1-6, paragraph 1-63:
Delete "1A Fuse (HP 2110-0001)."
Add "1.25A Fuse (HP 2110-0094)."
Page 6-29, Table 6-3:
Change A14MP1 to 7120-4264 LABEL: INFO: 200VA 2A 1.25A.
Page 6-38, Table 6-3:
Change F1 2110-0001 to F1 2110-0094 FUSE 1.25A 250V.
Service Sheet 22 (schematic):
Change Note 2 as follows:
"... AND 1.25 AMP FOR 220/240V."
CHANGE 16
Page 1-9, Table 1-1:
Add a footnote to Restabilization Time: After 1 min in RF OFF Mode to read, "These specifications apply only
if the RF ON/OFF switch has been wired to turn the RF Oscillator off."
Pages 4-5 and 4-6, paragraph 4-13:
Under SPECIFICATION, add a footnote to "Restabilization Time (normal mode) after 1 min. in RF OFF mode"
to read, "This specification applies only if the RF ON/OFF switch has been wired to turn the RF Oscillator
off."
Add a note to step 7 to read, "The first 10 minute wait applies only to instruments which have been wired to turn
the RF Oscillator off."
Page 4-75, paragraph 4-45:
Under SPECIFICATION, add a footnote to "Restabilization Time (phase locked mode) after 1 min. in RF OFF
mode" to read, "This specification applies only if the RF ON/OFF switch has been wired to turn the RF
Oscillator off."
7-41
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