Sony MDS-JA555ES Service Manual ▷ View online
9
[Checks before Part Replacement and Adjustment]
Cause of faulty can be approximately located by performing the following checks before starting the repair work. Refer to Section “5.
Electrical Adjustment” the check procedure.
Electrical Adjustment” the check procedure.
Note: The judgment criterion is shown for the purpose of judging if the performance is acceptable or not. This is not the specification value for adjustment.
Use the specification value for adjustment when the MDS-JA555ES is going to be adjusted.
Laser power check
(Refer to section 5-6-2, page 27.)
(Refer to section 5-6-2, page 27.)
Traverse check
(Refer to section 5-6-3, page 28.)
(Refer to section 5-6-3, page 28.)
Focus bias check
(Refer to section 5-6-4, page 29.)
(Refer to section 5-6-4, page 29.)
C PLAY check
(Refer to section 5-6-5, page 29.)
(Refer to section 5-6-5, page 29.)
Self-recording/playback check
(REC/PLAY)
(Refer to section 5-6-6, page 29.)
(REC/PLAY)
(Refer to section 5-6-6, page 29.)
Temperature compensation
offset check
(Refer to section 5-6-1, page 27.)
offset check
(Refer to section 5-6-1, page 27.)
Judgment criterion(NG when the measurement
value is out of the specification value)
• 0.9 mW power
Specification value: 0.84 to 0.92 mW
• 7.0 mW power
Specification value: 6.8 to 7.2 mW
• Iop (when 7 mW)
The Iop value that is shown on the optical
pick-up: +/- 10 mA
pick-up: +/- 10 mA
• Traverse waveform
Specification value: Offset 10% or less
• Checking the error rate
Specification value: All points of a, b, and c
CI error 220 or less
AD error 2 or less
CI error 220 or less
AD error 2 or less
• Checking the error rate
Specification value:
a. When using the test disc (MDW-74/AU-1)
CI error 80 or less
AD error 2 or less
b. When using the check disc (TDYS-1)
CI error 50 or less
a. When using the test disc (MDW-74/AU-1)
CI error 80 or less
AD error 2 or less
b. When using the check disc (TDYS-1)
CI error 50 or less
• Checking the error rate in C PLAY
Specification value:
CI error 80 or less
AD error 2 or less
CI error 80 or less
AD error 2 or less
• NG when “T=@@(##)(NG” appears
(@@ and ## are arbitrary numbers.)
Remedial measure in case of NG
• Cleaning the optical pick-up
• Readjustment
• Replacing the optical pick-up
• Readjustment
• Replacing the optical pick-up
• Replacing the optical pick-up
• Replacing the optical pick-up
• Replacing the optical pick-up
• Replacing the optical pick-up
In case of NG all the time:
• Replacing the overwrite head
• Check disconnection of the circuits around
• Replacing the overwrite head
• Check disconnection of the circuits around
the overwrite head
In case of intermittent NG:
• Check deformation of overwrite head
• Check mechanism around the sled
• Check deformation of overwrite head
• Check mechanism around the sled
• Check disconnection of the circuits around
the D101 (BD board)
• Check signals around the IC101, IC121,
CN102 and CN103 (BD board)
10
[Retry Cause Display Mode]
•
In this test mode, the retry causes of the MDS-JA555ES during record and stop modes can be displayed on the fluorescent display tube.
This mode becomes the “track mode” during playback in which the track information is available.
This mode is useful for locating the defective area of the MDS-JA555ES.
This mode becomes the “track mode” during playback in which the track information is available.
This mode is useful for locating the defective area of the MDS-JA555ES.
•
The contents to be displayed are as follows.
During record and stop modes: Retry cause, number of retries, and number of retry errors
During playback mode: Information such as disc types under playing back, position of playback and copyright.
Each information is displayed in hexadecimal number.
During record and stop modes: Retry cause, number of retries, and number of retry errors
During playback mode: Information such as disc types under playing back, position of playback and copyright.
Each information is displayed in hexadecimal number.
Procedure:
1. Load a recordable disc whose contents can be erased, into the MDS-JA555ES.
2. Press the MENU/NO button. After the message “Edit Menu” appears on the fluorescent display tube, rotate the lAMSL knob
2. Press the MENU/NO button. After the message “Edit Menu” appears on the fluorescent display tube, rotate the lAMSL knob
until the message “All Erase ?” appears.
3. Press the YES button. (Alternately the lAMSL knob can also be pressed.)
4. The message “All Erase ??” appears on the fluorescent display tube. Then the numerals on the music calendar flash.
5. Press the YES button, then the message “Complete !!” appears. Press the x button immediately, and wait for about 15 seconds while
4. The message “All Erase ??” appears on the fluorescent display tube. Then the numerals on the music calendar flash.
5. Press the YES button, then the message “Complete !!” appears. Press the x button immediately, and wait for about 15 seconds while
keeping pressing the button. (Alternately the lAMSL knob can be pressed instead of YES button.)
6. When the characters “TOC” have disappeared from the fluorescent display tube, remove your hands from the x button.
7. Press the zREC button to enter the record standby mode. Then press the X button to start recording.
8. When you want to enter the “Track mode”, press the N button to start playback.
9. To exit the test mode, press the ?/1 button. The message “TOC” flashes, the MDS-JA555ES enters the standby mode and exits the test
7. Press the zREC button to enter the record standby mode. Then press the X button to start recording.
8. When you want to enter the “Track mode”, press the N button to start playback.
9. To exit the test mode, press the ?/1 button. The message “TOC” flashes, the MDS-JA555ES enters the standby mode and exits the test
mode.
Fig. 1 Reading the Test Mode Display (During record and stop modes)
RTs@@c##e**
Display on the fluorescent display tube
Display on the fluorescent display tube
@@ : Cause of retry
##
##
: Number of retries
**
: Number of retry errors
Fig. 2 Reading the Test Mode Display (During playback)
@@ ####** $$
Display on the fluorescent display tube
Display on the fluorescent display tube
@@ : Parts No. (Area name that is given on the TOC)
##
##
: Cluster address (physical address on the disc)
**
: Sector
$$
: Track mode (track information such as copyright information of each part, etc.)
How to read the retry cause display:
Hexadecimal
Bit
Binary number
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
Hexadecimal Name of retry cause
When 1
01
02
04
08
10
20
40
80
shock
ader5
Address is not continuous
DIN unlock
FCS unlock
IVR rec error
CLV unlock
Access fault
When track jump (shock) is detected
When ADER is counted five times or more continuously
When ADIP address is not continuos
Detects DIN unlock is detected
When focus is unlocked
When signal level of the ABCD signal exceeds the specified range
When CLV is unlocked
When access operation is not performed normally
11
Reading the Display:
Convert the hexadecimal display of each digit into binary display. If more than two causes, they will be added.
Example When 42 is displayed:
Higher bit: 4 = 0100
→
b6
Lower bit: 2 = 0010
→
b2
In this case, the retry cause is combined of “CLV unlock” and “ader5”.
Example When A2 is displayed:
Higher bit: A = 1010
→
b7+b5
Lower bit: 2 = 0010
→
b1
In this case, the retry cause is combined of “ACCESS default”, “IVRrec” and “ader5”.
The reading of the track mode display is as follows.
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
Hexadecimal
When 0
When 1
01
02
04
08
10
20
40
80
Contents
Emphasis OFF
Monaural
2-bit display, normally 01
01: Normal audio, Other: Invalid
Audio (normal)
Original
Copyright exists
Writing is prohibited
Emphasis OFF
Stereo
Invalid
Digital copy
No copyright
Writing is allowed
Reading the Display:
Convert the hexadecimal display of each digit into binary display. The several causes are added and displayed.
Example When 84 is displayed:
Higher bit: 8 = 1000
→
b7
Lower bit: 4 = 0100
→
b2
This example shows that “Emphasis: OFF”, “Monaural”, “Original”, “Copyright exists” and “Writing is allowed” because b2 and b7 are 1
while all other bits are 0.
while all other bits are 0.
Example When 07 is displayed:
Higher bit: 0 = 0000
→
all 0
Lower bit: 7 = 0111
→
b0+b1+b2
This example shows that “Emphasis: ON”, “Stereo”, “Original”, “Copyright exists” and “Writing is prohibited” because b0, b1 and b2 are
1 while all other bits are 0.
1 while all other bits are 0.
Hexadecimal
→
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
12
SECTION 2
GENERAL
1
2
3
4 5 6 7
8
9
0
qa
qs
qd qf
qg
qh
qj
qk
ql
w;
wa
ws
wd
wf
wg
wh
wj
wk
wl
Front Panel
1
SATNDBY indicator
2
1/u
(POWER) button
3
Remote sensor
4
PITCH CONTROL button
5
SCROLL button
6
DISPLAY/CHAR button
7
REPEAT button
8
Display window
9
MENU/NO button
0
l
AMS
L
knob
qa
YES button
qs
DIGITAL REC LEVEL knob
qd
ANALOG REC LEVEL knob
qf
0
)
button
qg
z
REC button and indicator
qh
x
(STOP) button
qj
X
(PAUSE) button and indicator
qk
N
(PLAY) button and indicator
ql
A
OPEN/CLOSE button
w;
CLEAR button
wa
Disc Tray
ws
TIME button
wd
PLAY MODE button
wf
FADER button
wg
FILTER button
wh
INPUT button
wj
PHONE LEVEL knob
wk
PHONE jack
wl
TIMER knob
1
LINE (ANALOG) IN jack
2
LINE (ANALOG) OUT jack
3
DIGITAL IN (COAXIAL/OPT1/OPT2) jack
4
DIGITAL OUT
(COAXIAL/OPT1/OPT2) jack
(COAXIAL/OPT1/OPT2) jack
5
CONTROL A1 II jack
6
Power Supply cord
Rear Panel
1
2
3
4
5
6
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