Sony CX-J3000 Service Manual page 14

CX-J3000/J3000M
4. After the adjustments, apply suitable locking compound to
the pats adjusted.
Adjustment Location: Playback Head (Deck A).
Record/Playback/Erase Head (Deck B).
forward
reverse
TUNER SECTION 0 dB=1 µV
[MW]
Setting:
Function : RADIO
TUNER/BAND button : MW
loop antenna A
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
[FM]
Setting:
Function : RADIO
TUNER/BAND button: FM
FM RF signal
generator
75 kHz frequency
deviation by 1 kHz
signal
Output level:
as low as possible
[SW]
Setting:
Function : RADIO
TUNER/BAND button: SW-1 or SW-2
AM RF signal
generator
33 Ω 10 pF
30% amplitude
modulation by
400 Hz signal
14
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60 cm
loop antenna B
set
MAIN board
JW535 (ANT)
set
MAIN board
JW501 (GND)
MAIN board
JW535 (ANT)
set
MAIN board
JW501 (GND)
MAIN board
PHONES jack
(J202 or J203)
8 Ω
set
MAIN board
JW527 (VT)
JW528 (GND)
• Repeat the procedures in each adjustment several times, and the
tracking adjustments should be finally done by the trimmer ca-
pacitors.
• Remove FM/SW telescopic antenna in FM and SW adjustment.
MW IF ADJUSTMENT
Adjust for a maximum reading on level meter
L514
<< >>: J3000 only, ( ): 10kHz step status
MW VT VOLTAGE ADJUSTMENT
Adjustment Part Frequency Display
L503 531, (530) kHz
Confirmation 1,602, (1,710) kHz
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L516
TC503
SW1 VT VOLTAGE ADJUSTMENT (J3000 only)
Adjustment Part Frequency Display
L501 3.2 MHz
Confirmation 7.3 MHz
SW1 TRACKING ADJUSTMENT (J3000 only)
Adjust for a maximum reading on level meter
L504
TC502
SW2 VT VOLTAGE ADJUSTMENT (J3000 only)
Adjustment Part Frequency Display
L502 9.5 MHz
Confirmation 21.85 MHz
SW2 TRACKING ADJUSTMENT (J3000 only)
Adjust for a maximum reading on level meter
L505
FM VT VOLTAGE ADJUSTMENT
Adjustment Part Frequency Display
L513 87.5 MHz
Confirmation 108 MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L512
Adjustment Location: MAIN board (See page 15)
level meter
(range: 0.5 – 5 V ac)
+
–
digital voltmeter
450 kHz
Reading on Digital Voltmeter
1.5 ± 0.1 <<1.1±0.1>> V
6.3 ± 0.5 <<7.5±0.5>> V
( ): 10kHz step status
603 (620) kHz
1,404 (1,490) kHz
Reading on Digital Voltmeter
1.45 ± 0.1 V
6.5 ± 0.8 V
3.2 MHz
7.3 MHz
Reading on Digital Voltmeter
1.95 ± 0.1 V
7.5 ± 0.5 V
15 MHz
Reading on Digital Voltmeter
1.75 ± 0.1 V
5.8 ± 0.5 V
98 MHz