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CSA 803A Service Manual
5Ć21
ăStep 2:ăPerform the following operations in the order given:
H Set the front panel ON/STANDBY switch to STANDBY.
H Remove the L bracket on the front of the card cage.
H Remove both plastic retaining strips from the top of card cage.
H Remove the A17 Main Processor board, and then install it in the
fourth slot from the outer edge.
H Remove the A29 Memory Expansion board, and then install it in the
third slot.
H Remove the A14 Input/Output (I/O) board, and then install it in the
second slot.
H Move the A18 Memory board from the first slot to the fifth slot.
H Reconnect all the cables to the A14 I/O board.
H Set the CSA 803A front panel ON/STANDBY switch to ON.
ăStep 3:ăConnect the Frequency Counter as indicated in the setup
diagram (see also Figure 5Ć6), and set the controls as follows:
Frequency counter
Mode Period...............................................
Trigger DC................................................
Slope - (negative).........................................
Time Base 1 MHz..........................................
ăStep 4:ăMake the following CSA 803A selections:
UTILITY button press...........................................
Page to Enhanced Accuracy (in major menu) touch...........
Page to Utility2 (in major menu) touch........................
Extended Diagnostics (in major menu) touch.................
Extended Diagnostics (in popĆup menu) touch................
Block (in major menu) touch.................................
Input/Output (in popĆup menu) touch.........................
Area (in major menu) touch.................................
Real Time Clk (in popĆup menu) touch.......................
Routine (in major menu) touch...............................
Calibrate (in popĆup menu) touch............................
Run (in major menu) touch..................................
ăStep 5:ăExamine that the frequency counter reads within the limits of
999,995 ms and 1,000,005 ms.
DO NOT attempt to optimize the adjustment setting if the period is
within the stated limits. Proceed to Step 7.
ăStep 6:ăAdjust Real Time Clock, C510, for 1,000,000 ms.