12
ZS-S50CP
SECTION 4
TEST MODE
COLD RESET
Procedure:
1. In the power on status, press three buttons of
[ENTER]
,
x
,
[POWER]
simultaneously.
2. The set is reset and display “RESET”, then becomes standby
status.
PANEL TEST MODE
Procedure:
1. In the standby mode or power on status, press three buttons of
[ENTER]
,
[SLEEP]
,
[DISPLAY]
simultaneously.
2. When enter this mode, it turns on all segments of the liquid
crystal display.
3. In this mode, it displays as follows.
[BAND]
button
: Date/Version display
[AUDIO IN]
button: Destination display
4. To exit from this mode, press three buttons of
[ENTER]
,
[SLEEP]
,
[DISPLAY]
simultaneously.
CHANGE OF THE AM TUNING INTERVAL
(except Mexican model)
Procedure:
1. Press the
[POWER]
button to turn the power on.
2. Press the
[BAND]
button to select “AM”.
3. Press the
[ENTER]
button for 2 seconds, and then press the
[BAND]
button for 2 seconds, “9K STEP” or “10K STEP” is
displayed on the liquid crystal display.
4. The AM tuning interval is selected by pressing the
[TUNE +]
/
[TUNE ---]
button, and it is fixed by pressing the
[ENTER]
button.
SECTION 5
ELECTRICAL ADJUSTMENTS
CD SECTION
Note:
1.
CD Block is basically constructed to operate without adjustment.
2.
Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3.
Use an oscilloscope with more than 10 M
Ω
impedance.
4.
Clean the object lens by an applicator with neutral detergent when the
signal level is low than specified value with the following checks.
5.
Check the focus bias check when optical pick-up block is replaced.
FOCUS BIAS CHECK
Procedure :
1. Connect oscilloscope to TP121 (RFI) and TP124 (VC) on the
CD board.
2. Press the
[POWER]
button to turn the power ON and press the
[CD]
button to set the “CD” function.
3. Set disc (YEDS-18) on the tray and press the
N
button to
playback.
4. Confirm that oscilloscope waveform is as shown in the figure
below. (eye pattern)
A good eye pattern means that the diamond shape (
◊
) in the
center of the waveform can be clearly distinguished.
Checking Location:
+
–
CD board
TP121 (RFI)
TP124 (VC)
oscilloscope
(DC range)
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
level:
1.2
±
0.3 Vp-p
TP124
(VC)
– CD Board (Conductor Side) –
TP121
(RFI)
IC101
