Model 8640B TM 9-4935-601-14-7&P
MANUAL CHANGES
CHANGE J (cont'd)
Figure 7-7. A8A1 RF Scaler Assembly Backdating (Change J).
Service Sheet 22 (schematic):
Delete A20R27, A22R26 and R27.
Service Sheet 23 (schematic):
Delete A18R19.
CHANGE K
NOTE
See paragraph 7-52 for recommended instrument modification.
Page 6-21, Table 6-3:
Add A10OA2C5 0160-3456 CAPACITOR; FXD; 1000 PF 10% 250 WVDC.
Service Sheet 11 (schematic):
Add A10OA2C5 between the collector of A10A2Q3 and ground.
CHANGE L
Pages 6-38 and 6-39, Table 6-3:
R1 and AUDIO OUTPUT LEVEL knob changed. See paragraph 7-54 for recommended instrument modification.
7-22
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