Model 8640B TM 9-4935-601-14-7&P
MANUAL CHANGES
CHANGE E (cont'd)
Service Sheet 7 (schematic):
Delete shielded cable A9W1 and in its place add 948 wire (white-yellow-gray).
Delete Reference Designator A7J1.
Change part number of A7 assembly to 08640-60030.
Service Sheet 8 (schematic):
Change part number of A7 assembly to 08640-60030.
Service Sheet 13 (schematic):
Change A26A2Q7 to 1854-0023.
Change A26A2Q8 and Q9 to 1853-0020.
Change A26A2U1 to 1820-0398.
Change A26A2U2 to 1820-0370.
Change the pin configuration on the symbol and drawing for A26A2U1 shown in Figure 7-4.
Figure 7-4. A26A2U1 Backdating (Change E).
Service Sheet 14 (schematic):
Change A26A2Q2, Q5 and Q6 to 1854-0071.
Change A26A2Q3 to 1853-0020.
Service Sheet 18 (schematic):
Delete A8A1C3.
Change the following reference designators:
A8A1R8 to A8A1R3.
A8AIR9 to A8A1R5.
A8AIR10 to A8A1R7.
A8A1R11 to A8A1R6.
Change U5 to 5080-7001.
Replace appropriate portion of schematic with attached partial schematic (Figure 7-5).
7-17
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