Sony WRR-862A, Service Manual, Page: 23 / 96

3-9
WRR-862A/862B
Procedure
Step 1. Tuner 1 Checking
(1) Set the CONTROL switch (S1601) to “1”.
(2) Set the channel setting as follows;
.
Tuner 1 channel setting
Same as “1. Switch and Control Initial Setting” on
page 3-2.
n
Set the Tuner 2 to channel setting different from the
above Tuner 1 channel setting.
(3) Connect the audio analyzer to the OUTPUT 1 connec-
tor via MIC amp.
(4) Connect the signal generator to the ANT a connector.
(5) Set the signal generator as follows :
FREQUENCY(Carrier frequency):
CE21 model : 482.000 MHz
CE33 model : 578.000 MHz
CE62 model : 810.000 MHz
CE67 model : 850.000 MHz
U1416 model : 482.125 MHz
U3032 model : 578.125 MHz
U4244 model : 650.125 MHz
U6264 model : 770.125 MHz
U6668 model : 794.125 MHz
AU66 model : 799.250 MHz
RF OUTPUT (Output level) : 60 dB
u
V
EMF
(=
_
53 dBm)
MODULATION (Modulation frequency) : 1 kHz
DEVIATION (Frequency deviation) :
±
5 kHz
(6) Read the output level of the OUTPUT 1 connector (Au-
dio analyzer indication level).
This level is specified to be 0 dB.
(7) Turn OFF the MODULATION of the signal generator
(No modulation).
(8) Check that output level of the OUTPUT 1 is
_
61 dB or
less (S/N is 61 dB or more with A-weighted filter) as
compared with the level of procedure (6) above.
(9) Change the RF OUTPUT (output level) of the signal
generator as shown below.
RF OUTPUT (output level) : 20 dB
u
V
EMF
(=
_
93 dBm)
(10)Check that output level of the OUTPUT 1 is
_
38 dB or
less (S/N is 38 dB or more with A-weighted filter) as
compared with the level of procedure (6) above.
(11)Change the RF OUTPUT (output level) of the signal
generator as shown below.
RF OUTPUT (output level) : 60 dB
u
V
EMF
(=
_
53 dBm)
(12)Set the audio analyzer to the distortion mode.
(13)Turn ON the MODULATION of the signal generator.
(14)Check that distortion ratio is 0.9 % or less (
_
41 dB or
less) with A-weighted filter.
(15)Set the channel (Tuner 1) and FREQUENCY (Carrier
frequency) of the signal generator as shown
1
and
2
below.
Perform the procedures (1) to (14) above, for each
channel setting (
1
and
2
).
1
Channel setting :
CE21 model : Group 00, 2101 channel (470.125 MHz)
CE33 model : Group 00, 3301 channel (566.125 MHz)
CE62 model : Group 00, 6201 channel (798.125 MHz)
CE67 model : Group 00, 6701 channel (838.125 MHz)
U1416 model : Group 00, 1401 channel (470.125 MHz)
U3032 model : Group 00, 3001 channel (566.125 MHz)
U4244 model : Group 00, 4201 channel (638.125 MHz)
U6264 model : Group 00, 6201 channel (758.125 MHz)
U6668 model : Group 00, 6601 channel (782.125 MHz)
AU66 model : Group 00, 6601 channel (792.250 MHz)
Signal generator setting
FREQUENCY(Carrier frequency):
CE21 model : 470.125 MHz
CE33 model : 566.125 MHz
CE62 model : 798.125 MHz
CE67 model : 838.125 MHz
U1416 model : 470.125 MHz
U3032 model : 566.125 MHz
U4244 model : 638.125 MHz
U6264 model : 758.125 MHz
U6668 model : 782.125 MHz
AU66 model : 792.250 MHz
2
Channel setting :
CE21 model : Group 00, 2363 channel (493.875 MHz)
CE33 model : Group 00, 3563 channel (589.875 MHz)
CE62 model : Group 00, 6463 channel (821.875 MHz)
CE67 model : Group 00, 6964 channel (862.000 MHz)
U1416 model : Group 00, 1747 channel (493.875 MHz)
U3032 model : Group 00, 3347 channel (589.875 MHz)
U4244 model : Group 00, 4547 channel (661.875 MHz)
U6264 model : Group 00, 6547 channel (781.875 MHz)
U6668 model : Group 00, 6947 channel (805.875 MHz)
AU66 model : Group 00, 6751 channel (865.500 MHz)