Sony HCD-VZ50MD, Service Manual, Page: 12 / 132

12
(During playback)
@@####**$$
Fluorescent indicator tube
@@ : Parts No. (name of area named on TOC)
##
: Cluster
** : Sector
$$ : Track mode (Track information such as copyright
information of each part)
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
: Information such as type of disc played, part played, copyright.
These are displayed in hexadecimal.
Procedure:
1. Press the
x
button and DISPLAY button, CINEMA SPACE button.
2. When the mode is set, “RTs 00c 00e 000” is displayed.
3. Press the MD REC button to start recording. Then press the MD
u button and start recording.
4. To check the “track mode”, press the MD
u
button to start play.
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.
If the test mode cannot be exited, refer to “Forced Reset” on page 12 .
Fig. 1 Reading the Test Mode Display
(During recording and stop)
RTs@@c##c***
Fluorescent indicator tube
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 continu-
ously
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
@@ : Cause of retry
##
: Number of retries
*** : Number of retry errors
Fig. 2 Reading the Test Mode Display
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
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
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