Sony MB-806A Service Manual page 30

(7) Check first that indication "L" of "AC1L" on the LCD
(Tuner [1]) has disappeared, and then press the S708
switch on the RF-92 board (WRU-806A, Tuner [1]).
n
If the "L" indication does not disappear from the LCD
(on A area: refer to the previous procedure (5) (when
the RF input level is lower than the reference level) or
"H" is displayed (when the RF input level is higher
than the reference level), perform the following
adjustment.
1 Check the RF output level and frequency of the
signal generator (perform re-setting if necessary),
and repeat from procedure (1).
2 If the above conditions (the "L" indication does
not disappear, or "H" is displayed) remain even
after re-adjustment, it is necessary to check the
WRU-806A Tuner Unit.
(8) Indication on the LCD (Tuner [1]) appears as follows:
LCD:
A C2 L
(9) Set the FREQUENCY (carrier frequency) of the signal
generator as follow.
FREQUENCY(carrier frequency):
CE62 model; 806.000 MHz
CE69 model; 858.000 MHz
AU66 model; 799.000 MHz
(10)Check first that indication "L" of "AC2L" on the LCD
(Tuner [1]) has disappeared, and then press the S708
switch on the RF-92 board (WRU-806A, Tuner [1]).
(11)Indication on the LCD (Tuner [1]) appears as follows:
LCD:
A C3 L
(12)Set the FREQUENCY (carrier frequency) of the signal
generator as follow.
FREQUENCY(carrier frequency):
CE62 model; 811.000 MHz
CE69 model; 861.000 MHz
AU66 model; 804.000 MHz
3-4
(A C2 L)
(A C3 L)
(13)Check first that indication "L" of "AC3L" on the LCD
(Tuner [1]) has disappeared, and then press the "SET"
button on the front panel (Tuner [1]).
(14)Connect the signal generator to the ANTENNA B IN
connector with DC cut fixture.
(15)Indication on LCD (Tuner [1]) appears as follows:
LCD:
B C1 L
(16)Set the FREQUENCY(carrier frequency) of the signal
generator as follows;
FREQUENCY(carrier frequency):
CE62 model; 802.000 MHz
CE69 model; 855.000 MHz
AU66 model; 795.000 MHz
(17)Check first that indication "L" of "BC1L" on the LCD
has disappeared, and then press the S708 switch on the
RF-92 board (WRU-806A, Tuner [1]).
(18)Indication on the LCD (Tuner [1]) appears as follows:
LCD:
B C2 L
(19)Set the FREQUENCY(carrier frequency) of the signal
generator as follows;
FREQUENCY(carrier frequency):
CE62 model; 806.000 MHz
CE69 model; 858.000 MHz
AU66 model; 799.000 MHz
(20)Check first that indication "L" of "BC2L" on the LCD
(Tuner [1]) has disappeared, and then press the S708
switch on the RF-92 board (WRU-806A, Tuner [1]).
(21)Indication on the LCD (Tuner [1]) appears as follows:
LCD:
B C3 L
(B C1 L)
(B C2 L)
(B C3 L)
MB-806A (CE)
WRU-806A (CE, AU)