Output Level Adjustment - Sony WRR-805A Service Manual

3-2-1. Reference Frequency (4 MHz
oscillation frequency) Adjustment
Equipment and Tools Required
DC power supply : + 3.00 Vdc ± 0.02 V
Frequency counter
Connection/Adjustment Location
TP601
Freqency
counter
MB-861 board (A side)
Switch and Control Setting
MONITOR control (RV361) : Minimum position
MUTING switch (S605) :
Channel setting : Setting of the channel is to be perform
with the MODE switch (S601) , SET
switch (S604) , "+" switch (S602) and
"_" switch (S603).
CE62 model :
Group 00, 6301 channel (806.125 MHz)
CE69 model :
Group 00, 6933 channel (858.125 MHz)
AU66 model :
Group 00, 6701 channel (799.250 MHz)
Procedure
(1) Connect the frequency counter to the TP601 on the MB-
861 board (A-side).
(2) Adjustment
Specification : Frequency at TP601/MB-861 board (A side)
= 4.000 MHz ± 60 Hz
Adjustment : 1 CT601/MB-861 board (B side)
3-4
CT601
MB-861 board (B side)
OFF

3-2-2. Output level adjustment

Perform this adjustment when the OUTPUT connector
levels deviate from the specification.
Equipment and Tools
DC power supply: +3.00 Vdc ± 0.02 V
Audio analyzer (level meter, distortion meter)
Mic amp (Noise meter)
Oscilloscope
MM-SMA conversion connector (Part No. J-6402-480-A)
SMA-BNC conversion connector (Part No.J-6402-490-A)
AF Input/Output cable (Sony K-1334 or equivalent)
Adjuster (0.4 x 1.3 mm) : (Part No. 7-221-652-81)
Connection/Adjustment Location
Signal NM - SMA conversion connector
generator with SMA - BNC conversion connector
RV301
RF-93 board
(Side A)
OUTPUT
Mic amp
AF Input/Output cable
Audio
analyzer
(with A-weighted filter)
Osilloscope
Switch and Control Setting
MONITOR control(RV361) : Minimum position
MUTING switch (S605) :
Channel setting : Setting of the channel is to be perform
with the MODE switch (S601) , SET
switch (S604) , "+" switch (S602) and
"_" switch (S603).
CE62 model :
Group 00, 6301 channel (806.125 MHz)
CE69 model :
Group 00, 6933 channel (858.125 MHz)
AU66 model :
Group 00, 6701 channel (799.250 MHz)
Antenna input (J101)
_
+
MB-861 board (B side)
OFF
WRR-805A (CE, AU)