2-2. Preparation for Adjustment
2-3. +5 V Power Supply Voltage Adjustment
2-2. Preparation for Adjustment2-3. +++++5 V Power Supply Voltage
Adjustment
1. Remove the connector panel of the BKPF-L751.
2. Write down the customer setting of the switch S1Measuring equipment: Digital voltmeter
(LOOP/WORD switch) on the CN-1857 board of the
connector panel in following table.1. Set the digital voltmeter as follows:
3. Extend the ADC-40 board with a extension board.Range: AUTO
4. Write down the customer settings of each switch onMode: DC V
the ADC-40 board in following table.
5. Set the switches on the CN-1857 and ADC-40 boards+++++5 V adjustment for Digital line
as follows:2. Connect the probe of the digital voltmeter as follows:
+: TP1/ADC-40 (J-3)
BoardRef. No.Setting at adj.Customer
_: E1/ADC-40 (C-1)
(Address)setting
3. Adjust the voltage on the digital voltmeter.
CN-1857 S1WORD CLK OUT
Adjustment point:1RV1/ADC-40 (J-3)
ADC-40S1 (H-2)NORMAL
Specification:?0.05 V dc4.81
S3 (K-2)ON
S4 (J-3)NTSC PAL+++++5 V adjustment for Analog line
S5 (G-1)VIDEO4. Connect the probe of the digital voltmeter as follows:
S401 (A-1)ON+: TP2/ADC-40 (G-3)
_: E10/ADC-40 (G-2)
S402 (A-2)ON
5. Adjust the voltage.
S403 (A-2)ON
Adjustment point:1RV2/ADC-40 (G-3)
S404 (A-3)ON
Specification:?0.05 V dc4.81
S705 (G-1)NORMAL
n
6. Reattach the connector panel of the BKPF-L751.
When adjusting the power supply voltage, be sure to
7. Install the audio D/A convertor board (BKPF-L752 in
perform Sections 2-4 and later.
a factory default condition) to the interface unit.
Factory default condition of BKPF-L752.
. DIP switch (S3/DAC-38 board): All OFFs
. Adjust VRs (RV101, 201, 301, 401/DAC-38):
Each VR was completed the adjustment so as to
convert a _20 dB FS to +4.0 dBm.
8. Turn on the power of equipment, and warm up them
for about ten minutes.
E1WORD
ONVIDEOSYNG
S4011 RV401
NORMAL SWAPS5
RV405S705
ONS1
S4021 RV402
NORMALHIGH 0-5V
RV406S3
S4031 RV403E10OFF ON
ON
RV407RV1000 1S4
NTSCHD
S4041 RV4041 RV21 RV1PAL
ON
RV408TP2TP1
ADC-40 Board (Side A)
2-2 (E)BKPF-L751 |
ACEC
SONY
