Sony MB-806A Service Manual page 41

8. BATT (Battery) indicator check
Procedure
Step 1: Tuner | 1| (Tuner unit 1) checking
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 dBuVemr
(= —53 dBm)
MODULATION (Modulation frequency):
32.782 kHz
(32.782 kHz must be set
by connecting Function
generator)
DEVIATION (Frequency deviation): +2.1 kHz
(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 a
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.
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
(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
(Tuner unit 1) checking".
Tuner [1]> Tuner [2], [3], [4], [5], and [6]
MB-806A (CE)
WRU-806A (CE, AU)