Sony WRR-862A, Руководство по обслуживанию, Страница: 18 / 96

3-4
WRR-862A/862B
Signal
generator
Function
generator
AF output cable
OUTPUT1
OUTPUT2
ANT b
Mic amp
Audio
analyzer
(with A-weighted filter)
Oscilloscope
ANT a
4
3
1
2
Pin No.4
DC power supply DC ammeter
Pin No.1
To DC
POWER
SUPPLY
( + )
+ 12.0 ± 0.1V
( _ )
4P connector
Bottom View
+
_
+ _
+
_
1
1
1 1 1 1
RV611
RV601
RV701
RV711
1
1
Frequency
counter
CL1351
CT1401
AU-276 board (B side)
4
3
1
2
Pin No.4
DC power
supply
DC ammeter
Pin No.1
To DC
POWER
SUPPLY
(
+
)
+
12.0
±
0.1V
( _ )
4P connector
Bottom View
+
_
+ _
+
_
AU-276/285 board
CN1701
CN1801
Frat wire
RX-60/74 board
3-2-2. Reference Frequency (4 MHz
oscillation frequency) Adjustment
Equipment and Tools Required
DC power supply :
+
12.0 Vdc
±
0.1 V
Frequency counter
Adjuster (Part No. 7-221-652-81)
Connector 4P (Part No. 1-566-425-11)
Connection/Adjustment Location
When adjustment is performed, remove the case (upper)
from the WRR-862A/862B unit.
Switch and Control Setting
Same as “1. Switch and Control Initial Setting” on page 3-2.
Procedure
(1) Connect the frequency counter to the CL1351 on the
AU-276/285 board (B side).
(2) Adjustment
Specification : Frequency at CL1351/AU-276 board
(B side) = 4.000 MHz
±
60 Hz
Adjustment
:
1
CT1401/AU-276/285 board (B side)
3-2-3. Output Level Adjustment
Perform this adjustment when the OUTPUT connector
levels deviate from the specification.
Equipment and Tools
DC power supply:
+
12.0 Vdc
±
0.1 V
Audio analyzer (level meter, distortion meter)
Mic amp (Noise meter)
Oscilloscope
AF Output cable (supplied with WRR-862A/862B)
Adjuster (0.4
x
1.3 mm) : (Part No. 7-221-652-81)
Connector 4P (Part No. 1-566-425-11)
Preparation
(1) Remove the case (upper) and the partition.
(For removal, refer to the Section 2.)
(2) Connect the two flat wires of the RX-60/74 board to the
CN1701 and CN1801 connectors on the AU-276/285
board. The AU-276/285 and RX-60/74 boards must be
connected electrically as shown below.
Connection/Adjustment Location