Tuner Section - Sony HCD-DX60AV Service Manual

Tape Speed Adjustment
Note: Start the Tape Speed adjustment as below after setting to the test
mode.
Procedure:
1. Turn the power switch on.
2. Press the x button,
ENTER
simultaneously.
(The "TEST MODE" on the fluorescent indicator tube display
while in the test mode.)
To exit from the test mode, press the
Mode: Playback
test tape
WS-48B
(3 kHz, 0 dB)
set
1. Insert the WS-48B into the deck A and the blank tape into the
deck B.
2. Press the
REC PAUSE/START
deck B is at recording mode.
3. Set the deck A to playback mode.
4. Adjust SFR401 on the MAIN board so that frequency counter
reads 3,000 ± 15 Hz.
5. Frequency difference between deck A and deck B the beginning
of the tape should be within ±1.5 %.
Adjustment Location:
[MAIN BOARD] (Component side)
TAPE SPEED
Sample Value of Wow and Flutter: 0.3% or less W. RMS
DECK B
button and button
DISC 3
button.
I/1
frequency counter
32 Ω
+
–
PANEL board
PHONES jack (JACK701)
button on the deck B. Then the
CN406
SFR401
(WS-48B)
HCD-DX60AV/RG70AV

TUNER SECTION

FM Tuned Level Adjustment
FM RF SSG
Carrier frequency : 98 MHz
Modulation : AUDIO 1 kHz, 75 kHz
deviation (100%)
Output level : 28 dB (at 75 W open)
Procedure:
1. Supply a 28 dB 98 MHz signal from the ANTENNA terminal.
2. Tune the set to 98 MHz.
3. Adjust SFR101 to the point (moment) when the TUNED
indicator will change from going off to going on.
Adjustment Location: MAIN board
Null Adjustment
FM RF SSG
Carrier frequency : 98 MHz
Modulation : AUDIO 1 kHz, 75 kHz
deviation (100%)
Output level : 60 dB (at 75 W open)
Procedure:
1. Supply a 60 dB 98 MHz signal from the ANTENNA terminal.
2. Tune the set to 98 MHz.
3. Measure voltage between pin wa of IC101. Adjust T101 ubtil
the voltage becomes 0 V.
Adjustment Location: MAIN board
Adjustment Location
[MAIN BOARD] (Component side)
FE101 or FE102
FM TUNED LEVEL
SRF101
T101
NULL
IC101
75 Ω coaxial
set
FM ANTENNA terminal
(JK101)
75 Ω coaxial
set
FM ANTENNA terminal
(JK101)
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