CMT-C7NT, HCD-C7NT - Sony Audio Service Manual (repair manual). Page 28

28

u

x

M 

“R”

m 

“R”

x  +  >/M 

TUNING +

VOL - 

 +  

CD 

Z

MD 

Z

REPEAT

 

“R”

Sets continuous playback when this is pressed in the STOP state. When this is pressed during continu-
ous playback, playback position moves.

Stops continuous playback and continuous recording

The sled moves to the outer circumference only when this is pressed

The sled moves to the inner circumference only when this is pressed

Switches the spindle servo mode (CLV S y CLV A)

Switches the displayed contents each time the button is pressed

Ejects the disc

Releases the test mode

This test mode performs CREC and CPLAY automatically for mainly checking the characteristics of the optical pick-up.
To perform this test mode, the laser power must first be checked.
Perform AUTO CHECK after the laser power check and Iop Compare.

Procedure:
1. Press the .

 “R”

or >

 “R”

button to display “AUTO CHECK” (C01).

2. Press the

ENTER/YES “R”

button. If “LDPWR 

 ” is displayed, it means that the laser power check has not been

performed. In this case, perform the laser power check and Iop Compare, and then repeat from enter the MD test mode.

3. If a disc is in the mechanical deck, it will be ejected forcibly.

“DISC IN” will be displayed in this case. Load a test disc (MDW-74/GA-1) which can be recorded.

4. If a disc is loaded at step 3, the check will start automatically.
5. When “XX CHECK” is displayed, the item corresponding to XX will be performed.

When “60 CHECK” completes, the disc loaded at step 3 will be ejected. “DISC IN” will be displayed. Load the check disc
(TDYS-1).

6. When the disc is loaded in step 5, the check will automatically be resumed from “07 CHECK”.
7. After completing to test item 12 (“0C CHECK”), check OK or NG will be displayed. If all items are OK, “CHK ALL OK” will

be displayed. If any item is NG, it will be displayed as “NG:xxxx”.

When “CHK ALL OK” is displayed, it means that the optical pick-up is normal. Check the operations of other parts (spindle
motor, sled motor, etc.).
When displayed as “NG:xxxx”, it means that the optical pick-up is faulty. In this case, replace the optical pick-up.

Display the software version.

Procedure:
1. Press the .

 “R”

or >

 “R”

button to display “INFORMATION” (C31).

2. Press the

ENTER/YES “R”

button.

3. The software version will be displayed.
4. Press the

MENU/NO “R”

button to end this mode.