Sony WRR-805A, Service Manual

Page: 23 / 54

3-3 WRR-805A (CE, AU)
1. Preparation
(1) When adjustments/checking are performed, remove the
case(upper) and antenna from the WRR-805A unit.
(2) Connect between the connector CN1 of MB-861 board
and connector CN3 of the RF-93board with harness as
shown in the figure below.
(3) Connect the MM-SMA conversion connector (J-6402-
480-A) with SMA-BNC conversion connector (J-6402-
490-A) to the antenna connector (J101) on the MB-861
board as below.
(4) Connect a DC power supply as shown in the figure
below.
Checking
After the DC power supply connection is completed, set the
POWER switch (S501) to on, check the level on the DC
ammeter.
DC ammeter indication level
(under no-RF signal input and MUTING OFF mode) :
170
±
5 mA
2. Adjustment Location
RF-93 board
+
+
+
_
_
_
DC ammeter DC power supply
MB-861 board (B side)
SMA - BNC
conversion
connector
NM - SMA
conversion
connector
J101
LCD
TP601 TP604
+ (S602)
_ (S603)
MONITOR
(RV361)
MONITOR
(J302)
RF-93 board RV301
Antenna input
(J101)
OUTPUT
(J301)
MODE
(S601)
SET
(S604)
POWER
MUTING
(S605)
CT601
MB-861 board (A side)
MB-861 board (B side)