Sony DNW-A100 Maintenance Manual page 167

1. Free Run Frequency Adjustment
Refer to 4-1 page for the operation method of the maintenance mode when checking.
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Wait more than 10 minutes after turning power on, then start the adjustment.
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The sub mode and menu of the maintenance mode that is used in Section 4-2 is as shown below.
(1) Push S1101 on the SS-63 board so as to enter the maintenance mode.
(2) Select A234: SDTI DEC VR of the maintenance mode.
(3) Adjust 1RV100 on the CP-300 board temporarily that D713 (VCO ADJ) on the DIF-42 board
illuminates or the VCO STATUS on the menu screen becomes "1".
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Perform this temporary adjustment if the frequency counter can not be prepared.
(4) Fine adjust 1RV100 on the CP-300 board with the frequency counter that the specification is satis-
fied.
Specification: 27.0 ± 0.1 MHz
(5) Wait for 10 minutes under power on state.
(6) Check the value of the frequency counter satisfies the specification.
(7) Push the MENU button four times so as to exit the maintenance mode.
(8) Perform the operation check referring to the next page.
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
M0: TAPE MAINTENANCE
A2: AUDIO/VIDEO ADJUST
A23: CP VR
A234: SDDI DEC VR
RV100
CP-300
1-664-973-11
A
4-2. CP-300 Board (BKNW-103)
4-13