HCD-MJ1, HCD-MJ1A - Sony Audio Service Manual (repair manual). Page 13

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Each time the DISPLAY button is pressed, the display changes in the following order.
MODE display

nError rate displaynAddress display

1. MODE display

Displays “TEMP ADJUST” , “CPLAY MODE” , etc.

2. Address display

Addresses are displayed as follows.
h =       

s =         (MO pit and CD)

h =       

a =         (MO groove)

h = Header address
s = SUBQ address
a = ADIP address
* A ‘   ’ display appears when the address cannot be loaded.

3. Error rate display

Error rates are displayed as follows.
C1 =       

AD =       

C1 = Indicates C1 error
AD = Indicates ADER

(

During continuous playbak

STOP

^

Tracking servo OFF

Tracking servo ON

REC

Recording mode ON

Recording mode OFF

SYNC

CLV LOCK

CLV UNLOCK

TRACK

Pit

Groove

DISC

High refiection

Low refiection

LEVEL-SYNC

CLV-S

CLV-A

MEMORY

ABCD adjustment completed

SHUFFLE

Focus auto gain successful

Focus auto gain successful

Tracking auto gain successful

Tracking auto gain failed

2 As loading related operations will be performed regardless of the test mode operations being performed, be sure to check that the disc

is stopped before setting and removing it.
Even if the MD 

§ button is pressed  while the disc is rotating during continuous playback, continuous recording, etc., the disc will not

stop rotating.
Therefore, it will be ejected while rotating.

        * Always press the NO button before pressing the MD 

§ button.

2 The erasing-protection tab is not detected in the test mode. Therefore, when modes which output  the recording laser power such as

continuous recording mode and traverse adjustment mode, etc. are set, the recorded contents will be erased regardless of the position
of the tab. When using a disc that is not to be erased in the test mode, be careful not enter the continuous recording mode and traverse
adjustment mode.