Tele-File System Adjustment (Dio-69 Board) - Sony SRW-5000 Maintenance Manual

8-9. Tele-File System Adjustment
(DIO-69 Board)
m
. Perform this adjustment when the DIO-69 or SE-606A
board has been replaced.
. For detail of each menu in the maintenance mode, refer
to Section 3.
Tools
. Oscilloscope:
TEKTRONIX TDS3054B or equivalent
n
Use a probe with input capacity of approx. 10.8 pF
(TEK P6137 or equivalent).
. Adjusting driver (ceramic)
. Recording tape: BCT-SR series
n
The HDCAM cassette tape with the Tele-File label can
be used for adjustment/check.
Adjustment
n
Pay careful attention to the following points to perform the
correct adjustment.
. Be sure to remove the cassette tape from the unit.
. Keep the SE-606A board away from the piece of metal
such as chassis and so on.
1. Set and connect the oscilloscope as follows:
n
Never contact the ground probes with the DIO-69
board. This may cause damage to the circuit on the
DIO-69 board.
CH-1: TP101/DIO-69 (A-2), AC 5 V/DIV
GND: Chassis
CH-2: TP102/DIO-69 (A-2), AC 5 V/DIV
GND: Chassis
MODE: CH2 INVERT, ADD,
20 MHz BW LIMIT = OFF
TIME: 20 nsec/DIV
TRIG: CH-1, AC
LEVEL: 1 V
2. Turn on the power, and display the Tele-File CHECK
menu.
(HOME menu → [SFT] + [DIAG] → [SFT] + [F8]
→ [F9] → [F1] → Tele-File CHECK menu)
(For the Tele-File CHECK menu, refer to Section 3-3-9.)
8-38
3. Press the [F2] (RF) key to the setting to ON.
4. While checking the 13.5 MHz waveform with the
oscilloscope, adjust using the adjusting driver (ceram-
ic) to maximize the amplitude.
1CT101/DIO-69 (A-2)
Adj. point:
Specification: A = maximum value (more than 14 V
p-p of sine waveform)
5. Insert the recording tape.
6. Press the [F3] (READ TEST) key.
7. Check that the FAIL is 0 after 10 seconds.
8. Press the [F4] (WRITE TEST) key.
9. Press the [F4] (WRITE TEST) key while pressing the
[SFT] (SHIFT) key.
10. Check that the FAIL is 0 after 10 seconds.
11. Exit the maintenance mode.
12. Eject the recording tape.
A
1
TP102
TP101
2
CT101
TP103
TP106
3
TP104
TP105
4
DIO-69 Board (Side A)
A
B
SRW-5000/5500