3-34
BRC-300/300P
BRU-300/300P
A
3-4-3. VCO Free-Running Frequency
Adjustment
Adjustment Procedure
1.
Remove the cover panel. (Refer to Section 1-4-1.)
2.
Check that S3001-2 on the MC-66 board is set as
follows:
NTSC (BRC-300):
OFF
PAL (BRC-300P):
ON
3.
Set S3501-3 and S3501-4 on the MC-66 board to ON.
4.
Connect the tools and equipment, referring to Section
3-4-2.
5.
Turn on the power of all the equipment, and warm
them up for about 20 minutes.
D4401 on the MC-66 board lights and “EVR_BRU
no:001 data:xxx” will be displayed.
6.
Adjust “data” using the UP and DOWN switches
(S4803 and S4804) so that the value on the frequency
counter satisfies the specification.
Adjustment item:
Data of EVR_BRU no:001
Specification:
3579545
±
5 Hz (NTSC)
4433618
±
5 Hz (PAL)
7.
Perform “3-4-4. Encoder Output Level Adjustment”.
3-4. BRU-300/300P Electrical Alignment
3-4-4. Encoder Output Level Adjustment
n
Before this adjustment, perform “3-4-3. VCO Free-
Running Frequency Adjustment”.
Adjustment Procedure
1.
Press the ADJ switch S4802 on the CN-2548 board to
display “EVR_BRU no:002 data:xxx”.
2.
Adjust “data” using the UP and DOWN switches
(S4803 and S4804) so that Y waveform level A on the
waveform monitor satisfies the specification.
Adjustment item:
Data of EVR_BRU no:002
Specification:
A = 100
±
1 IRE (NTSC)
A = 700
±
7 mV p-p (PAL)
3.
Turn off the power of all the equipment.
4.
Return S3501-3 and S3501-4 on the MC-66 board to
OFF.
5.
Reattach the cover panel. (Refer to Section 1-4-1.)
S3001
S3501
MC-66 BOARD (SIDE A)
S4801
S4802
S4803
S4804
CN-2548 BOARD (SIDE A)