Sony HCD-DX60AV, Service Manual

Page: 19 / 76

19
HCD-DX60AV/RG70AV
Tape Speed Adjustment
DECK B
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
button and
DISC 3
button
simultaneously.
(The “TEST MODE” on the fluorescent indicator tube display
while in the test mode.)
To exit from the test mode, press the
I/
1 button.
Mode: Playback
1. Insert the WS-48B into the deck A and the blank tape into the
deck B.
2. Press the
REC PAUSE/START
button on the deck B. Then the
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:
set
test tape
WS-48B
(3 kHz, 0 dB)
frequency counter
PANEL board
PHONES jack (JACK701)
–
+
32
Ω
TUNER SECTION
FM Tuned Level Adjustment
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
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
FM RF SSG
75
Ω
coaxial
Carrier frequency : 98 MHz
Modulation : AUDIO 1 kHz, 75 kHz
deviation (100%)
Output level : 28 dB (at 75 W open)
FM ANTENNA terminal
(JK101)
set
FM RF SSG
75
Ω
coaxial
Carrier frequency : 98 MHz
Modulation : AUDIO 1 kHz, 75 kHz
deviation (100%)
Output level : 60 dB (at 75 W open)
FM ANTENNA terminal
(JK101)
set
[MAIN BOARD] (Component side)
CN406
SFR401
TAPE SPEED
[MAIN BOARD] (Component side)
SRF101
FE101 or FE102
FM TUNED LEVEL
NULL
T101
IC101
Sample Value of Wow and Flutter: 0.3% or less W. RMS
(WS-48B)