MDS-SP55 - Sony Audio Service Manual (repair manual). Page 10

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• In this test mode, the causes for retry of the unit during recording can be displayed on the fluorescent indicator tube. During playback, the

“track mode” for obtaining track information will be set.
This is useful for locating the faulty part of the unit.

• The following will be displayed :

During recording and stop : Retry cause, number of retries, and number of retry errors.
During playback

: Information such as type of disc played, part played, copyright.

These are displayed in hexadecimal.

Procedure:
1. Load a recordable disc whose contents can be erased, into the unit.
2. Press the  MENU/NO  button (MD). When “Edit/Menu” is displayed on the LCD display, Rotate the  l L  knob (MD) to display

“All Erase??”.

3. Press the  ENTER/YES  button (MD).
4. “All Erase??” is displayed on the LCD display.
5. Press the  ENTER/YES  button (MD) to display “Complete!!”, and press the  s  button (MD) immediately. Wait for about 10 seconds

while pressing the button.

6. When the “MD Blank disk” displayed on the LCD display goes off, release the  s  button (MD).
7. Press the  z REC  button (MD) to enter recording standby. Then press the  S  button (MD) and start recording. In about 2 seconds, the

record mode retry cause is displayed. (Fig.1) If recording cannot be performed, rotate the  FUNCTION  konb (TA) and set a different
section.

8. To check the “track mode”, stop recording by pressing  s  button (MD) and press the  H  button (MD) to start play and the track

information in the play mode appears.

9. To exit the test mode, press the  ?/1  button (TA), and turn OFF the power. When “STNDBY” disappears, disconnect the power plug

from the outlet. If the test mode cannot be exited, refer to “Forced Reset”on page 9.

} Address (Physical address on disc)

Hexadecimal

Bit

Binary

Higher Bits

Lower Bits

8

4

2

1

8

4

2

1

b7 b6 b5 b4 b3 b2 b1 b0

0

0

0

0

0

0

0

1

0

0

0

0

0

0

1

0

0

0

0

0

0

1

0

0

0

0

0

0

1

0

0

0

0

0

0

1

0

0

0

0

0

0

1

0

0

0

0

0

0

1

0

0

0

0

0

0

1

0

0

0

0

0

0

0

When track jump (shock) is detected

When ADER was counted more than five times

continuously

When ADIP address is not continuous

When DIN unlock is detected

When not in focus

When ABCD signal level exceeds the specified range

When CLV is unlocked

When access operation is not performed normally

Hexa-

decimal

shock

ader5

Discontinuous address

DIN unlock

FCS incorrect

IVR rec error

CLV unlock

Access fault

Cause of Retry

Occurring conditions

01

02

04

08

10

20

40

80

RTs@@c##c**

Fluorescent display tube display

@@ : Cause of retry
##

: Number of retries

**

: Number of retry errors

@@####**$$

Fluorescent display tube display

@@ : Parts No. (name of area named on TOC)
##

: Cluster

**

: Sector

$$

: Track mode (Track information such as copyright

information of each part)

Reading the Display:
Convert the hexadecimal display into binary display. If more than two causes, they will be added.

When 42 is displayed:
Higher bit : 4 = 0100 

t b6

Lower bit : 2 = 0010 

t b1

In this case, the retry cause is combined of “CLV unlock” and “ader5”.

When A2 is displayed:
Higher bit : A = 1010 

t b7+b5

Lower bit : 2 = 0010 

t b1

The retry cause in this case is combined of “Access fault”, “IVR rec error”, and “ader5”.

Reading the Retry Cause Display