Sony AN-LP1, Руководство по обслуживанию

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SECTION 3
ELECTRICAL ADJUSTMENT
FREQUENCY ADJUSTMENT
Connection:
Note: Make this adjustment, if either ANTENNA board or CONTROL
board in this set was replaced or if equivalent work was executed,
because these boards have been adjusted in a pair.
2. Disconnect a loop antenna assy from the ANTENNA board,
and connect a dummy antenna coil (2.2µH (1-410-320-00))
between TP (ANT+) and TP (ANT–) of the ANTENNA board.
3. Connect the ANTENNA MODULE, ANTENNA CONTROL-
LER, RADIO for adjustment (e.g. multi-band radio having ex-
ternal antenna input terminal (ICF-SW7600G)), and level meter
as shown below.
Adjustment Procedure:
1. Adjust the receiving frequency of the radio for adjustment (ICF-
SW7600G) to the AM RF SSG frequency (refer to the follow-
ing table).
2. Adjust respective adjusting elements on the CONTROL board
so that the level meter reading becomes maximum when the
frequency of AM RF SSG and the FREQ SELECT switch are
set as listed below.
Adjustment and Connection Location:
[ANTENNA BOARD] (Conductor Side)
[CONTROL BOARD] (Conductor Side)
AM RF SSG
output level:
as low as possible
TP(DUMMY-IN)
ANTENNA board
0.5 pF
TP(SG GND)
+
–
level meter
ANTENNA
CONTROLLER
ANTENNA
MODULE
Long cord of
ANTENNA
CONTROLLER
Short cord of
ANTENNA
CONTROLLER
J1 and J2
RADIO of
adjustment
(ICF-SW7600G)
external
antenna jack
headphone
jack
TP
(SG GND)
TP
(ANT–)
TP
(ANT+)
TP
(DUMMY-IN)
J1 J2
RV103
RV104
RV105
RV106
S101
FREQ SELECT
SWITCH
RV102 RV107 RV108 RV109 RV101
AM RF SSG FREQ. SELECT Adjusting
frequency switch position elements
3.950 MHz 4 RV101
4.900 MHz 5 RV102
6.075 MHz 6 RV103
7.250 MHz 7 RV104
9.700 MHz 10 RV105
11.825 MHz 12 RV106
13.700 MHz 14 RV107
16.500 MHz 16 RV108
20.400 MHz 20 RV109
1. Connect AM RF SSG to the TP (DUMMY-IN) and TP (SG
GND) of the ANTENNA board.