Sony MDS-JB940 Service Manual page 9

RETRY CAUSE DISPLAY MODE
• 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
During playback
These are displayed in hexadecimal.
Procedure:
Procedure 1: Press the x button continuously for about 10 seconds.
1.
Procedure 2: Press the LEVEL/DISPLAY/CHAR button while pressing the x button and MENU/NO button.
2. When the mode is set, "RTs 00c 00e 000" is displayed.
Press the z REC button to start recording. Then press the X button and start recording.
3.
To check the "track mode", press the H button to start play.
4.
5. To exit the test mode, press the ?/1 button, and turn OFF the power. When "TOC" disappears, disconnect the power plug from the
outlet.
Fig. 1 Reading the Test Mode Display
(During recording and stop)
RTs@@c##e
Fluorescent indicator tube display
@@ : Cause of retry
## : Number of retries
: Number of retry errors
**
Reading the Retry Cause Display
Higher Bits Lower Bits
Hexadecimal
8 4 2
Bit b7 b6 b5 b4 b3 b2 b1 b0
Binary
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 1
0 1 0
1 0 0
Reading the Display:
Convert the hexadecimal display into binary display. If more than two causes, they will be added.
Example
When 42 is displayed:
: 4 = 0100 t b6
Higher bit
: 2 = 0010 t b1
Lower bit
In this case, the retry cause is combined of "CLV unlock" and "ader5".
When A2 is displayed:
Higher bit : A = 1010 t b7+b5
: 2 = 0010 t b1
Lower bit
The retry cause in this case is combined of "access fault", "IVR rec error", and "ader5".
: Retry cause, number of retries, and number of retry errors.
: Information such as type of disc played, part played, copyright.
**
Hexa-
1 8 4 2 1
decimal
0 0 0 0 1 01
0 0 0 1 0 02
0 0 1 0 0 04
0 1 0 0 0 08
1 0 0 0 0 10
0 0 0 0 0 20
0 0 0 0 0 40
0 0 0 0 0 80
Fig. 2 Reading the Test Mode Display
Fluorescent indicator tube display
@@ : Parts No. (name of area named on TOC)
##
**
$$
Cause of
Retry
shock When track jump (shock) is detected
When ADER was counted more than five times
ader5
continuously
Discontinuous address When ADIP address is not continuous
DIN unlock When DIN unlock is detected
FCS incorrect When not in focus
IVR rec error When ABCD signal level exceeds the specified range
CLV unlock When CLV is unlocked
Access fault When access operation is not performed normally
(During playback)
@@ ### $$
**

: Cluster

Address
: Sector 
: Track mode (Track information such as
copyright information of each part)
Occurring conditions
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