System Control Alignment - Sony HDW-750 Maintenance Manual

10-4. System Control Alignment

10-4. System Control Alignment
10-4-1. Battery Voltage Correction
Adjustment
This adjustment supplies accurate +12 V power voltage to
the DC IN connector. The Battery Voltage Correction
Adjustment is required when the FP-121 board is replaced.
Adjustment Procedure
1. Set the switch S1-1/AT-143 board to the ON position.
2. Set the MENU ON/OFF switch on the inside panel to
the ON position to start up the maintenance mode.
3. Select "A90 : BATTERY CORRECTION". The
message "FEED ACCURATE DC +12V, PUSH RE
TO ADJUST" appears.
4. Press the rotary encoder to start adjustment.
5. When adjustment is complete, the message "COM-
PLETE" appears. Then press the rotary encoder.
B
CT101
A
TP101
TP102
1 2
10-12
TP103
3 4
CCM-45 board (A side)
10-4-2. Antenna Tuning Frequency
Adjustment (Tele-File)
Adjustment Procedure
m
. The adjustment frequency is 13.56 MHz.
. Set the oscilloscope Filter and Bandwidth Limiter to
OFF. Check that the oscilloscope probe is already
calibrated.
1. Insert a cassette on which the memory label is at-
tached.
2. Connect TP103 with the frame chassis (metallic part)
of the unit with a shorting clip.
3. Equipment : Oscilloscope
Measurement point : TP101 (A-2)/CCM-45 board
Adjustment point : CT101 (A-2)/CCM-45 board
Specifications : A = Maximum amplitude
(9 Vp-p or more)
A
4 Equipment : Oscilloscope
Measurement point : TP102 (A-2)/CCM-45 board
A > 9 Vp-p
Specifications :
HDW-750/750CE V1