Sony MB-806A Service Manual page 42

8. BATT (Battery) indicator check
Procedure
Step 1: Tuner [1] (Tuner unit 1) checking
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The checking procedures describe that the WRU-806A (to
be adjusted) is installed into the Tuner [1] slot on the MB-
806A.
(1) Set the MB-806A as follows;
Front panel (Tuner [1])
Channel setting:
CE62 model; Group 00, 6301 channel (806.125 MHz)
CE69 model; Group 00, 6933 channel (858.125 MHz)
AU66 model; Group00, 6701 channel (799.250 MHz)
Muting: ON (Normal mode)
Rear panel
ATT (ANTENNA A, B) switch: 0 dB
(2) Connect the signal generator to the ANTENNA A IN
connector with DC cut fixture.
(3) Set the signal generator as follows:
Signal generator setting
FREQUENCY(carrier frequency):
CE62 model; 806.125 MHz
CE69 model; 858.125 MHz
AU66 model; 799.250 MHz
RF OUTPUT (Output level): 60 dBuV
MODULATION (Modulation frequency):
DEVIATION (Frequency deviation): ± 2.1 kHz
3-16
EMF
(= _53 dBm)
32.782 kHz
(32.782 kHz must be set
by connecting Function
generator)
(4) Turn on and off the MODULATION (modulation
frequency) of the signal generator as follows, and
check that BATT Indicator (Tuner [1]) change also as
follows:
MODULATION setting BATT indicator of Tuner [1]
of signal generator
ON BATT indicator (LCD);
Turn the signal
generator on and BATT
indicator starts blinking
after 30 seconds.
BATT indicator (LED);
Turn the signal
generator on and BATT
indicator starts blinking
after 30 seconds.
OFF BATT indicator (LCD);
Goes out.
BATT indicator (LED);
Goes out.
(5) Connect the signal generator to the ANTENNA B IN
connector with DC cut fixture, and perform the
procedures (3) and (4) above.
Step 2: Tuner [2] to Tuner [6] checking
When the WRU-806A Tuner Unit is installed in the Tuner
[2] (Tuner unit 2) to Tuner [6] (Tuner unit 6) of the MB-
806A, perform the adjustments from procedures (1) to (4)
of "Step 1. Tuner [1] (Tuner unit 1) checking" on the
respective tuner units that are installed in the MB-806A.
When performing the above described checking change the
following details as shown below, of the "Step 1. Tuner
[1] (Tuner unit 1) checking".
Tuner [1]→ Tuner [2], [3], [4], [5], and [6]
[1] [1]
[1] [1]
AF BATT
AF BATT
MB-806A (CE)
WRU-806A (CE, AU)