Sony WRT-800A, Руководство по обслуживанию

Страница: 12 / 40

WRT-800A (AU)
1. Preparation
(1) When adjustments are performed, remove the AU-258 and RF-87 boards from WRT-800A unit.
Refer to the “Section 2 Service overview” for removal.
(2) Insert the harness of the AU-258 board into the connector CN302 on the RF-87 board.
The AU-258 and RF-87 boards must be connected electricalty as shown below.
(3) Connect the RF adjusting connector to the anntena connector (CN401/RF-87 board) as shown
below.
Required Parts
SMA (MALE) -BNC (FEMALE) Conversion connector : 1
(4) Connecting the DC power supply
Checking
After the DC power supply connection is complete,
set the power switch (S201/AU-258 board) to on, and
check the level on DC current meter.
DC current meter indication level: 70 to 90 mA
2. Adjustment Location
3-3
SMA-BNC conversion connector RF adjusting connector
RF-87 board (B side) AU-258 board (A side)
Harness
CN302
CN401
CN401
Solder.
DC power supply
DC current meter
Lead wires
(30 to 80 mm)
+ _
+ _
DC power supply :
+
1.5
±
0.1 Vdc
DC current meter : 100 mA
RF-87 Board (B side) AU-258 Board (A side) CT301 (RF Frequency)
CN101 (B side)
S201
RV401
(RF Power)
RF-87 Board (B side)
AU-258 Board (A side)
1
1
1
CT401
(RF Power)
1
RV103
(Tone Dev)
1
RV104
(Ref Dev)
1
1
RV101
(LIM Dev)
RV102
(CLP Dev)
S302
(A side)
S303
(A side)
S301
(A side)
S304
(A side)