S/N Checking - Sony WRR-862A Service Manual

Step 2. Tuner 2 Adjustment
(1) Set the CONTROL switch to "2".
(2) Connect the signal generator to the ANT a connector.
(3) Set the signal generator as follows:
Signal generator setting
FREQUENCY (Carrier frequency)
CE21 model : 471.000 MHz
CE33 model : 567.000 MHz
CE62 model : 799.000 MHz
CE67 model : 839.000 MHz
U1416 model : 471.000 MHz
U3032 model : 567.000 MHz
U4244 model : 639.000 MHz
U6264 model : 759.000 MHz
U6668 model : 783.000 MHz
AU66 model : 793.000 MHz
RF OUTPUT (Output level) : 20 dBuV
MODULATION (Modulation frequency) :
(4) Perform the adjustments from procedures (7) to (25) in
"Step 1. Tuner 1 Adjustment" .
When performing the above described adjustments
change the following detail as shown below.
Tuner 1 → Tuner 2
(5) After the adjustment (for Tuner 2) is completed, also
Tuner 2 will return to normal operation mode.
3-8
EMF
(=_93 dBm)
OFF (No modulation)

3-2-5. S/N Checking

n
Perform this adjustment/check with the case (upper) , parti-
tion and battery case installed.
(Do under the regular use condition).
Equipment and Tools
DC power supply : +12.0 Vdc ± 0.1 V
Signal generator
Function generator
Audio analyzer with A-weighted filter
Mic amp (Noise mete)
Oscilloscope
AF Output cable (supplied with WRR-862A/862B)
Connector 4 P (Part No. 1-566-425-11)
Connection
Signal
generator
ANT a
DC power supply DC ammeter
+ _
+
_
+12.0 ± 0.1V
+
_
4P connector
Pin No.4
To DC
(+)
POWER
Pin No.1
Bottom View
(_)
SUPPLY
Switch and Control Setting
Same as "1. Switch and Control Initial Setting" on page 3-2.
Mic amp
AF output cable
OUTPUT1
OUTPUT2
Audio
analyzer
ANT b
(with A-weighted filter)
Oscilloscope
DC 12V IN
4 1
3 2
WRR-862A/862B