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17

2

Remove four solders.

1

flexible flat cable (16 core)
(CN301)

3

CD board

4

op base assy
(KSM-213D)

18

The cold reset clears all data including preset data stored in the
RAM to initial conditions. Execute this mode when returning the
set to the customer.
Procedure:

1. Press three buttons of [   /CANCEL] ,    –  and

I/

1

simulta-

neously.

2. The system is reset and becomes standby states.

This mode is used to check operations of amplifier.
Procedure:

1. Press the

I/

1

button to turn the power on.

2. Press three buttons of [   /CANCEL] ,

 

[ENTER] and    –  si-

multaneously.

3. When the COMMON test mode is activated, “AUDIO IN” is

displayed on the liquid crystal display and “c PLAY SLEEP”
blink on the liquid crystal display.

4. Each time [EQ] button on the remote commander is pressed,

the display changes starting “TONE MAX”, “TONE MIN”
and “TONE FLAT” this order.

5. Press the [VOL ---] button, “VOLUME MIN” is displayed on

the liquid crystal display. Press the [VOL +] button, “VOLUME
MAX” is displayed on the liquid crystal display.

6. To release this mode, press the

I/

1

button.

This mode is used to check the liquid crystal display, LED, model,
destination, software version and key.
Procedure:

1. Press the

I/

1

button to turn the power on.

2. Press three buttons of [CD       ],

 

[DSGX] and [ENTER] simul-

taneously.

3. All segments on the liquid crystal display and [STANDBY] LED

light up.

4. Press the [ENTER]  button, the model and destination are

displayed on the liquid crystal display.

5. Press the [ENTER] button again, MC version is displayed on

the liquid crystal display.

6. Each time [ENTER]  button is pressed, the display changes

starting from MC version, GC version, USBL version (CBX3
only), USBM version (CBX3 only), CD version, CDD version,
CDMA version, CDMB version, BDA version, BDB version,
ST version, TA version and TM version this order, and returns
to the MC version display.

7. When [   /CANCEL] button is pressed while the MC version

is displayed, year, month and day of the software creation
is displayed. When [   /CANCEL] button is pressed again,
the display returns to the MC version display.

8. Press the [DSGX] button, the key test mode is activated and

“K 0” is displayed on the liquid crystal display.

9. Each time a button is pressed, “K” value increases. However,

once a button is pressed, it is no longer taken into account.

All keys are pressed, display becomes  “K18”.

10. To release this mode, press three buttons in the same manner

as step 2, or disconnect the power cord.

A step of AM tuning interval can be changed over between 9 kHz
or 10 kHz.
Procedure:

1. Press the

I/

1

button to turn the power on.

2. Press the [TUNER/BAND] button to select “AM”.
3. Press the

I/

1

button again to turn the power off.

4. Press two buttons of [TUNER/BAND] and

I/

1

simultaneously.

5. The message “AM 9kHz Step” or “AM 10kHz Step” is

displayed on the liquid crystal display and thus the tuning
interval is changed over.

This mode moves the optical pick-up to the position durable to
vibration. Use this mode when returning the set to the customer
after repair.
Procedure:

1. Press the

I/

1

button to turn the power on.

2. Press the [FUNCTION] button to select “CD” (BX5BT/CBX1).

Press the [CD] button on the remote commander to select “CD”
(CBX3).

3. Press three buttons of [DSGX], [TUNER/BAND] and

Z

simul-

taneously.

4. After the “STANDBY” display blinks, the ship mode is set

and the system is reset.

This mode is used to perform CD ship mode and cold reset
simultaneously.
Procedure:

1. Press the

I/

1

button to turn the power on.

2. Press three buttons of  [   /CANCEL], [TUNER/BAND] and

Z

simultaneously.

3. After the “STANDBY” display blinks, the ship mode is set

and the system is reset.

This mode is used to unable to take sample disc out of disc tray in
the shop.
Procedure:

1. Press the

I/

1

button to turn the power on.

2. Press the

Z

button to open the disc tray and set the CD disc.

3. Press the

Z

button to close the disc tray.

4. Press the [FUNCTION] button to select “CD” (BX5BT/CBX1).

Press the [CD] button on the remote commander to select “CD”
(CBX3).

5. Press two buttons of  [   /CANCEL] and

Z

for 5 seconds.

6. The message “LOCKED” is displayed on the liquid crystal

display and the disc tray is locked. (Even if pressing
the

Z

button, the message “LOCKED” is displayed on the

liquid crystal display and the disc tray is locked)

7. To release from this mode, press two buttons of [   /CANCEL]

and 

Z

for 5 seconds.

8. The message “UNLOCKED” is displayed on the liquid crystal

display and the disc tray is unlocked.

u

x

x

x

x

x

x

x

19

This mode is used to changed over CD power on/off for decreasing
of reception noise in the tuner mode.
Procedure:

1. Press the

I/

1

button to turn the power on.

2. Press the [FUNCTION] button to select “CD” (BX5BT/CBX1).

Press the [CD] button on the remote commander to select “CD”
(CBX3).

3. Press the

I/

1

button again to turn the power off.

4. Press two buttons of [   /CANCEL] and

I/

1

simultaneously.

5. The message “CD POWER ON” or “CD POWER OFF”is

displayed on the liquid crystal display, and CD power on/off
is changed over in the tuner mode.

This mode can run the CD sled motor freely. Use this mode, for
instance, when cleaning the optical pick-up.
Procedure:

1. Press the

I/

1

button to turn the power on.

2. Press the [FUNCTION] button to select “CD” (BX5BT/CBX1).

Press the [CD] button on the remote commander to select “CD”
(CBX3).

3. Press three buttons of [   /CANCEL], [CD    ] and

Z

simul-

taneously, the message “SERVICE M” is displayed on the liq-
uid crystal display.

4. Press the [TUNE ---] button to move the optical pick-up to inside

track and the message “SLED IN” is displayed on the liquid
crystal display, or press the [TUNE +] button to outside track
and the message “SLED OUT” is displayed on the liquid
crystal display.

5. Press the [CD     ] button, “LD ON” or “LD OFF” is dis-

played  on the liquid crystal display. Each time [CD     ]
button is pressed, laser diode on/off is changed over.

6. To release this mode, press the

I/

1

button.

This mode is used to check the firmware version and address of
bluetooth module.
Procedure:

1. Press the

I/

1

button to turn the power on.

2. Press the [FUNCTION] button to select “BLUETOOTH”.
3. Press three buttons of [DSGX], [BLUTOOTH    ] and [BLU-

TOOTH OPR] simultaneously, the message “BT Test” is dis-
played on the liquid crystal display. Then, the display is au-
tomatically changed to the firmware version of bluetooth
module.

4. Press the [DISPLAY] button, address of bluetooth module is

displayed on the liquid crystal display.

5. To release this mode, press the

I/

1

button.

x

x

u

u

u

u

20

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.

1. Connect oscilloscope to TP121 (RFI) and TP124 (VC) on the

CD board.

2. Press the

I/

1 button to turn the power ON.

3. Set disc (YEDS-18) on the tray and press the

CD

 u 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.

+
–

CD board

TP121 (RFI)
TP124 (VC)

oscilloscope

(DC range)

VOLT/DIV: 200 mV
TIME/DIV: 500 ns

level:
1.2 

±

 0.3 Vp-p

1. Turn on the set.
2. Input the following signal from signal generator to FM antenna

input directly.

Carrier frequency: A = 87.5 MHz, B = 98 MHz, C = 108 MHz

Deviation

: 75 kHz

Modulation

: 1 kHz

ANT input

: 35 dBu (EMF)

Use 75 ohm coaxial cable to connect signal generator and the set.
You cannot use video cable for checking.
Use signal generator whose output impedance is 75 ohm.

3. Set to FM tuner function and tune A, B and C signals.
4. Confirm “TUNED” is lit on the display for A, B and C signals.

When the selected station signal is received in good condition,
“TUNED” is displayed.

signal 

generator

set

TP124

(VC)

TP121

(RFI)

IC101