Sony D-NF430 - Electrical Adjustments

8
D-NF430/NF431
SECTION 4
ELECTRICAL ADJUSTMENTS
0 dB=1 µV
[AM]
Setting:
Function: RADIO
Band: AM
[FM/TV/WB]
Setting:
Function: RADIO
Band: FM (NF430: UK/NF431)
FM/TV/WB (NF430: US)
•Repeat the procedures in each adjustment several times, and
the tracking adjustments should be finally done by the trimmer
capacitors.
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level:
as low as possible
Put the lead-wire
antenna close to
the set.
+
–
level meter
set
16 Ω
MAIN board
TJ808 (GND)
MAIN board
TP217 (TU-L) or
TJ215 (TU-R)
FM RF signal
generator
75 kHz frequency
deviation by 1 kHz
signal
Output level:
as low as possible
+
–
level mete
r
set
16 Ω
0.01 µ F
MAIN board
TP102 (FM RF IN)
MAIN board
TP104 (FM RF GND)
MAIN board
TJ808 (GND)
MAIN board
TP217 (TU-L) or
TJ215 (TU-R)
digital voltmeter
TP111 (VT)
TP104 (FM RF GND)
100 k
Ω
MAIN board
( ): NF430: UK/NF431
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T102 620 (621) kHz
( ): NF430: UK/NF431
AM FREQUENCY COVERAGE CONFIRMATION
Adjustment Part Frequency Display Reading in Digital Voltmeter
Confirmation 531 (530) kHz 0.9 ± 0.5 V
Confirmation 1,710 (1,602) kHz 7.2 (6.8) ± 1.0 V
( ): NF430: UK/NF431
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
T101 620 (621) kHz
CT101 1,400 (1,404) kHz
FM FREQUENCY COVERAGE CONFIRMATION
Adjustment Part Frequency Display Reading in Digital Voltmeter
Confirmation 87.5 MHz 5.2 ± 0.8 V
Confirmation 108 MHz 9.0 ± 1.0 V
TV (2 – 6 ch) FREQUENCY COVERAGE CONFIRMATION
Adjustment Part Frequency Display Reading in Digital Voltmeter
Confirmation 2 ch 9.0 ± 0.4 V
Confirmation 6 ch 5.2 ± 0.8 V
(NF430: US)
FM/TV (2 – 6 ch) TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L104 98 MHz
TV (7 – 13 ch) FREQUENCY COVERAGE CONFIRMATION
Adjustment Part Frequency Display Reading in Digital Voltmeter
Confirmation 7 ch 4.7 ± 0.6 V
Confirmation 13 ch 8.0 ± 1.0 V
(NF430: US)
WB FREQUENCY COVERAGE CONFIRMATION
Adjustment Part Frequency Display Reading in Digital Voltmeter
Confirmation 2 ch 3.3 ± 0.5 V
(NF430: US)
TV (7 – 13 ch)/WB TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L103 10 ch (197.75 MHz)
(NF430: US)
Adjustment and Connecting Location: MAIN board
(See page 9)