Sony MDS-PC2 Service Manual ▷ View online
9
Back up board
FLUORESCENT DISPLAY TUBE ALL LIGHTING AND KEY CHECK MODE
In this mode, the fluorescent display tube check and key check can be performed.
Procedure:
1. While pressing the INPUT button and
1. While pressing the INPUT button and
r (REC) button, insert the power plug into the outlet.”
2. The fluorescent display tube displays “FL ALL 10n Key” momentarily and lights up completely.”
3. The display goes off partially each time a button is pressed.
4. When all buttons are pressed, “Push INPUT” is displayed.
5. When the INPUT button is pressed, the fluorescent display tube displays “Seg Chk” momentarily and lights up partially.
6. When the INPUT button is pressed, it displays “Rmk Chk” momentarily followed by “Push Rmc Key”.
3. The display goes off partially each time a button is pressed.
4. When all buttons are pressed, “Push INPUT” is displayed.
5. When the INPUT button is pressed, the fluorescent display tube displays “Seg Chk” momentarily and lights up partially.
6. When the INPUT button is pressed, it displays “Rmk Chk” momentarily followed by “Push Rmc Key”.
If not using a remote commander, end there and disconnect the power plug from the outlet. If using a remote commander, press any
button.”
button.”
7. The check is completed when “Chk End!”is displayed. Press the I/
u button to end.”
FORCED RESET
The system microprocessor can be reset in the following procedure.
Use these procedure when the unit cannot be operated normally due to the overrunning of the microprocessor, etc.
The line output level and PHONES output level can be varied in the range from 0 dB to -40 dB using the remote commander of this unit.
When forced reset is executed, these levels will be set to the initial value of -20 dB.
Use these procedure when the unit cannot be operated normally due to the overrunning of the microprocessor, etc.
The line output level and PHONES output level can be varied in the range from 0 dB to -40 dB using the remote commander of this unit.
When forced reset is executed, these levels will be set to the initial value of -20 dB.
Procedure :
1. Disconnect the power plug from the outlet.
2. Remove the BACK UP board.
3. Insert the power plug into the outlet.
4. Mount the back up board.
5. Press the I/
1. Disconnect the power plug from the outlet.
2. Remove the BACK UP board.
3. Insert the power plug into the outlet.
4. Mount the back up board.
5. Press the I/
u button. When “Initialize” is displayed, it means that forced reset has been executed.
[POWER BOARD] (Component Side)
10
Fig. 1 Reading the Test Mode Display
(During recording and stop)
(During recording and stop)
RTs@@c##c**
Fluorescent display tube display
@@ : Cause of retry
##
##
: Number of retries
**
: Number of retry errors
Fig. 2 Reading the Test Mode Display
(During playback)
(During playback)
@@####**$$
Fluorescent display tube display
@@ : Parts No. (name of area named on TOC)
##
##
: Cluster
**
: Sector
$$
: Track mode (Track information such as copyright infor-
mation of each part)
Reading the Retry Cause Display
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.
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
During playback
: Information such as type of disc played, part played, copyright.
These are displayed in hexadecimal.
Precedure:
1. Load a recordable disc whose contents can be erased into the unit.
2. For discs with no disc name, set the name display using the remote commander. (The time display is set after some time. Leave as it is if
1. Load a recordable disc whose contents can be erased into the unit.
2. For discs with no disc name, set the name display using the remote commander. (The time display is set after some time. Leave as it is if
desired.)
3. Press the
p button immediately. Wait for about 10 seconds while pressing the button. (The AMS knob can be pressed instead of the YES
button for the same results.)
4. The fluorescent display tube displays “RTs@@c##e**”.
5. Press the
5. Press the
r button to start recording. Then press the ^ button and start recording.
6. To check the “track mode”, press the
^ button to start play.
7. To exit the test mode, press the
1/u button. If the test mode cannot be exited, refer to “Forced Reset” on page 8.
} 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
Reading the Display:
Convert the hexadecimal display into binary display. If more than two causes, they will be added.
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
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
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”.
11
Reading the Display:
Convert the hexadecimal display into binary display. If more than two causes, they will be added.
Convert the hexadecimal display into binary display. If more than two causes, they will be added.
Example When 84 is displayed:
Higher bit : 8 = 1000
n b7
Lower bit : 4 = 0100
n b2
In this case, as b2 and b7 are 1 and others are 0, it can be determined that the retry cause is combined of “emphasis OFF”, “monaural”,
“original”, “copyright exists”, and “write allowed”.
“original”, “copyright exists”, and “write allowed”.
Example When 07 is displayed:
Higher bit : 0 = 1000
n All 0
Lower bit : 7 = 0111
n b0+b1+b2
In this case, as b0, b1, and b2 are 1 and others are 0, it can be determined that the retry cause is combined of “emphasis ON”, “stereo”,
“original”, “copyright exists”, and “write prohibited”.
“original”, “copyright exists”, and “write prohibited”.
Hexadecimal
n
Binary Conversion Table
Hexadecimal
Binary
Hexadecimal
Binary
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
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
Hexa-
decimal
Details
01
02
04
08
10
20
40
80
Emphasis OFF
Monaural
This is 2-bit display. Normally 01.
01:Normal audio. Others:Invalid
Audio (Normal)
Original
Copyright
Write prohibited
When 0
When 1
Emphasis ON
Stereo
Invalid
Digital copy
No copyright
Write allowed
Reading the Track Mode Display
12
This section is extracted from
instruction manual.
instruction manual.
Location of Parts and Controls
SECTION 2
GENERAL
Front Panel
2
4
6
7
8
9
10
11
1
3
5
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