Sony MDS-JB920 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 : Retry cause, number of retries, and number of retry errors.
During playback
These are displayed in hexadecimal.
Precedure:
1. Load a recordable disc whose contents can be erased into the unit.
[MENU/NO]
2. Press the button. When "Edit/Menu" is displayed on the fluorescent display tube, rotate the
display "All Erase?".
[YES]
3. Press the button. (Or press the
4. When "All Erase??" is displayed on the fluorescent display tube, the music calendar number blinks.
button to display "Complete!!", and press the p button immediately. Wait for about 15 seconds while pressing the
[YES]
5. Press the
[ AMS ] ≠
button. (The
6. When the "TOC" displayed on the fluorescent display tube goes off, release the p button.
button to start recording. Then press the P button and start recording.
r
[ REC]
7. Press the
8. To check the "track mode", press the · button to start play.
9. To exit the test mode, press the 1/
outlet. If the test mode cannot be exited, refer to "Forced Reset" on page 8.
Fig. 1 Reading the Test Mode Display
(During recording and stop)
RTs@@c##c
Fluorescent display tube display
@@ : Cause of retry
## : Number of retries
: Number of retry errors
**
Reading the Retry Cause Display
Higher Bits
Hexadecimal
8 4 2 1
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 0 0 1
0 0 1 0
0 1 0 0
1 0 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:
Higher bit: 4 = 0100 n b6
Lower bit : 2 = 0010 n b1
In this case, the retry cause is combined of "CLV unlock" and "ader5".
When A2 is displayed:
Higher bit: A = 1010 n b7+b5
Lower bit : 2 = 0010 n b2
The retry cause in this case is combined of "access fault", "IVR rec error", and "ader5".
: Information such as type of disc played, part played, copyright.
[ AMS ] ≠ ±
±
knob can be pressed instead of the
[ ]
[ ]
u
button, and turn OFF the power. When "TOC" disappears, disconnect the power plug from the
**
Lower Bits
Hexa-
8 4 2 1
decimal
01
0 0 0 1 shock
0 0 1 0 02
ader5
04
0 1 0 0 Discontinuous address
08
1 0 0 0 DIN unlock
10
0 0 0 0 FCS incorrect
20
0 0 0 0 IVR rec error
0 0 0 0 40 CLV unlock
80
0 0 0 0 Access fault
knob)
[ ]
[YES]
button for the same results.)
[ ]
[ ]
Fig. 2 Reading the Test Mode Display
Fluorescent display tube display
@@ : Parts No. (name of area named on TOC)
## : Cluster
**
$$ : Track mode (Track information such as copy-
Cause of Retry
When track jump (shock) is detected
When ADER was counted more than five times
continuously
When ADIP address is not continuous
When DIN unlock is detected
When not in focus
When ABCD signal level exceeds the specified range
When CLV is unlocked
When access operation is not performed normally
– 9 –
[ AMS ] ≠
(During playback)
@@#### $$
**
: Sector
right information of each part)
Occurring conditions
±
knob to