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9

The disc tray lock function for the antitheft of a demonstration disc in the store is equipped.
Procedure:
1.

Press the  ?/1  button to turn the set on.

2.

Select the function “CD”.

3.

A disc is put in and a tray is closed.

4.

Press two buttons of  x  and  Z  (CD) simultaneously for five seconds.

5.

The message “LOCKED” is displayed and the tray is locked. (Even if turning power on/off, the tray is still locked.)

6.

Press two buttons of  x  and  Z  (CD) simultaneously for five seconds again.

7.

The message “UNLOCKED” is displayed and the tray is unlocked.

Under such a position, please do the following confirmation.

Checking the earth from the TC board to the chassis
With this unit, when playing back the cassette tape and turning up the volume while the earth connection of the TC board is detached from the
chassis, oscillation may occur and the tweeter may be damaged.
Therefore, check that the earth is securely connected to the chassis after repair.

About “R”
As this unit has only a few buttons, some operations require the use of remote commander (RM-SM100W/provided with unit)  buttons. These
operations are indicated as “R” in this manual.
Example:  MENU/NO “R”  ...Press the  MENU/NO  button of the remote commander.

Incorrect operations may be performed if the test mode is not entered properly.
In this case, press the  ?/1  button to turn the power off, and retry to enter the test mode.

If the disc tray does not open and the message “LOCKED” appears, press the two buttons of  

x

  and  Z  (CD)  at the same for

5 seconds or longer.
Then the lock is released, the message “UNLOCKED” appears for 2 seconds and the disc tray opens.

MAIN BOARD

TC BOARD

*

 

earth wire

*

 

earth terminal

cassette mechanism deck
(CMAL1Z-233A)

*

 

Either an earth wire or an earth terminal is attached.

10

1.

If an earth wire is attached

1-1. The wire must be clipped securely on the chassis. (fig 3)
1-2. The screw on the cassette mechanism deck must be securely

tightened. (fig 2)

1-3. The wire must not be broken. (fig 2)

2.

If an earth terminal is attached

2-1. The screw for the earth terminal on the TC board must be

securely tightened. (fig 5)

2-2. The jumper chip (C648) next to the earth terminal must be

securely attached. (fig 6)

The screw must be securely tightened.

The wire must not be broken.

fig1 : Attaching position of the earth wire (TC side)

fig2 : Close up the earth wire 

fig3 : exterior the earth wire 

The earth wire must be
securely connected.

fig4 : Position of the earth terminal

fig5 : Close up the earth terminal

fig6 : The earth terminal pattern face

The screw must
be securely
tightened.

C648 CHIP
JUMPER
must be
securely
attached.

Earth terminal

Earth 
terminal

11

MAIN BOARD

MD DIGITAL BOARD

MD mechanism deck section
(MDM-7S2D)

CD mechanism deck section
(CDM55A-30BBD6)

MAIN BOARD

POWER BOARD

jig (6P) (J-2501-229-A)

AMP BOARD

REG BOARD

12

The special jig (J-2501-196-A) is useful for checking the waveform of the BD (MD) board. The names of terminals and the checking items
to be performed are shown as follows.

I+3V : For measuring Iop (Check the deterioration of the optical pick-up laser)
Iop

: For measuring Iop (Check the deterioration of the optical pick-up laser)

GND : Ground
TE

: TRK error signal (Traverse adjustment)

FE

: Focus error signal

VC

: Reference level for checking the signal

RF

: RF signal (Check jitter)

I+3V

CN105

Iop

TE

VC

GND

FE

RF

I+3V
Iop
GND
TE
FE
VC
RF

I+3V
Iop
GND
TE
FE
VC
RF

1

7

for MDM-7S2D