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Change-over of AM (MW) Tuner Step between 9 kHz and 10 kHz
• A step of AM (MW) channels can be changed over between 9 kHz and 10 kHz.
Procedure:
1. Press 1/u button to turn the set ON.
2. Select the function "TUNER", and press TUNER/BAND button to select the BAND "AM (MW)".
3. Press 1/u button to turn the set OFF.
4. Press FUNCTION and 1/u buttons simultaneously, and the display of fluorescent indicator tube changes to "AM (MW) 9 kHz STEP"
or "AM (MW) 10 kHz STEP", and thus the channel step is changed over.
Change-over of LW Tuner Step between 1 kHz and 3 kHz
• A step of LW channels can be changed over between 1 kHz and 3 kHz.
Procedure:
1. Press 1/u button to turn the set ON.
2. Select the function "TUNER", and press TUNER/BAND button to select the BAND "LW".
3. Press 1/u button to turn the set OFF.
4. Press FUNCTION and 1/u buttons simultaneously, and the display of fluorescent indicator tube changes to "LW 1 kHz STEP" or "LW
3 kHz STEP", and thus the channel step is changed over.
LED and Fluorescent Indicator Tube All Lit, Key Check Mode
Procedure:
1. Press PLAY MODE and p (MD) buttons simultaneously.
2. LEDs and fluorescent indiator tube are all turned on.
3. When the FUNCTION button is pressed, the fluorescent indicator tube lights up in the order of; partial lighting 1 n partial lighting 2 n
all lit n partial lighting 1 n ······.
When the VOLUME knob is rotated, the LED lighting pattern changes.
To end without switching to the key check mode, press the 1/u button to turn off the power.
4. Press p (CD) button, and the key check mode is activated.
5. In the key check mode, the fluorescent indicator tube displays "KEY=0 JOG=0". Each time a button is pressed, "KEY=" value increases.
However, once a button is pressed, it is no longer taken into account.
"JOG=" Value increases like 1, 2, 3 ... if rotating VOLUME knob in clockwise direction, or it decreases like 10, 9, 8 ... if rotating in
counterclockwise direction.
6. To exit from this mode, press order all buttons (15 buttons), the displays "KEY=OK", and press any button, or disconnect the power cord.
SUB CLOCK CHECK
Procedure:
1. Connect an oscilloscope to IC601 pin (¡ and ground of the MAIN board.
2. Press PLAY MODE and p (MD) buttons simultaneously, and the fluorescent indiator tube displays "32.768 kHz (91)".
3. To check the signal on oscilloscope becomes 32 kHz square wave.
4. Press 1/u button to exit.
SECTION 4
SERVICE MODE
– 17 –
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