Sony MDS-JE470 Service Manual ▷ View online
7
MDS-JE470
Iop DATA RECORDING AND DISPLAY WHEN OPTICAL PICK-UP AND NON-VOLATILE MEMORY (IC195 OF
BD BOARD) ARE REPLACED
BD BOARD) ARE REPLACED
The Iop value labeled on the optical pick-up can be recorded in the non-volatile memory. By recording the value, it will eliminate the need to
look at the value on the label of the optical pick-up. When replacing the optical pick-up or non-volatile memory (IC195 of BD board), record
the Iop value on the optical pick-up according to the following procedure.
look at the value on the label of the optical pick-up. When replacing the optical pick-up or non-volatile memory (IC195 of BD board), record
the Iop value on the optical pick-up according to the following procedure.
Record Precedure:
1. While pressing the l AMS L knob and x button, connect the power plug to the outlet, and release the l AMS L knob and
1. While pressing the l AMS L knob and x button, connect the power plug to the outlet, and release the l AMS L knob and
x button.
2. Rotate the l AMS L knob to display “[Service]”, and press the YES button.
3. Rotate the l AMS L knob to display “Iop Write” (C05), and press the YES button.
4. The display becomes “Ref=@@@.@” (@ is an arbitrary number) and the numbers which can be changed will blink.
5. Input the Iop value written on the optical pick-up.
3. Rotate the l AMS L knob to display “Iop Write” (C05), and press the YES button.
4. The display becomes “Ref=@@@.@” (@ is an arbitrary number) and the numbers which can be changed will blink.
5. Input the Iop value written on the optical pick-up.
To select the number : Rotate the l AMS L knob.
To select the digit
To select the digit
: Press the l AMS L knob.
6. When the YES button is pressed, the display becomes “Measu=@@@.@” (@ is an arbitrary number).
7. As the adjustment results are recorded for the 6 value. Leave it as it is and press the YES button.
8. “Complete!” will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become “Iop
7. As the adjustment results are recorded for the 6 value. Leave it as it is and press the YES button.
8. “Complete!” will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become “Iop
Write”.
9. Press the REPEAT button to complete.
Display Precedure:
1. While pressing the l AMS L knob and x button, connect the power plug to the outlet, and release the l AMS L knob and
1. While pressing the l AMS L knob and x button, connect the power plug to the outlet, and release the l AMS L knob and
x button.
2. Rotate the l AMS L knob to display “[Service]”, and press the YES button.
3. Rotate the l AMS L knob to display “Iop Read” (C26).
4. “@@.@/##.#” is displayed and the recorded contents are displayed.
3. Rotate the l AMS L knob to display “Iop Read” (C26).
4. “@@.@/##.#” is displayed and the recorded contents are displayed.
@@.@ : indicates the Iop value labeled on the optical pick-up.
##.#
##.#
: indicates the Iop value after adjustment
5. To end, press the l AMS L button or MENU/NO button to display “Iop Read”. Then press the REPEAT button.
8
MDS-JE470
OPTICAL PICK-UP BLOCK TYPE DISCRIMINATION
There are two types of the optical pick-up block in this model.
These are compatible except for the laser power.
Check the type of the optical pick-up block before replacement.
Ajdust following items after replacing the optical pick-up block.
• 5-6-2. Laser Power Check (See page 28)
• 5-10. LASER POWER ADJUSTMENT (See page 31)
These are compatible except for the laser power.
Check the type of the optical pick-up block before replacement.
Ajdust following items after replacing the optical pick-up block.
• 5-6-2. Laser Power Check (See page 28)
• 5-10. LASER POWER ADJUSTMENT (See page 31)
Differences
KMS-260B
KMS-260E
Color of the adhesive agent at PDIC portion
Pink
White
Form of FPC retainer plate
Close the hole on SL base
Not close the hole on SL base
APC variable resistor
Small volume (2 type)
Big variable resistor (3 type) and chip resistor (Fig. A)
Small variable resistor (2 type) and chip resistor (Fig. B)
Fig. B type is for repair.
• Abbreviation
260B: KMS-260B model
260E: KMS-260E model
KSN-260B
KSN-260E
(Fig A)
(Fig B)
CHIP
3 type variable
resistor
resistor
2 type variable
resistor
resistor
CHIP
Hold on SL base
Hold on SL base
FPC retainer plate
FPC retainer plate
APC variable
resistor
resistor
Adhesive agent at
PDIC portion
PDIC portion
Adhesive agent at
PDIC portion
PDIC portion
9
MDS-JE470
CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS
Before performing repairs, perform the following checks to determine the faulty locations up to a certain extent.
Details of the procedures are described in “5 Electrical Adjustments”.
Details of the procedures are described in “5 Electrical Adjustments”.
• 5-6-2. Laser power check (see page 28)
• 5-6-3. Iop Compare (see page 28)
• 5-6-4. Auto Check (see page 29)
• 5-6-3. Iop Compare (see page 28)
• 5-6-4. Auto Check (see page 29)
Note:
The criteria for determination above is intended merely to determine if satisfactory or not, and does not serve as the specified value for
adjustments.
When performing adjustments, use the specified values for adjustments.
The criteria for determination above is intended merely to determine if satisfactory or not, and does not serve as the specified value for
adjustments.
When performing adjustments, use the specified values for adjustments.
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.
Procedure :
Remove the short-pin attached to CN406, and then attach it again.
Use these procedure when the unit cannot be operated normally due to the overrunning of the microprocessor, etc.
Procedure :
Remove the short-pin attached to CN406, and then attach it again.
[MAIN BOARD] (Component Side)
@
CN406
10
MDS-JE470
Fig. 2 Reading the Test Mode Display
(During playback)
(During playback)
@@###**$$
Fluorescent display tube display
@@ : Parts No. (name of area named on TOC)
### : Cluster
**
### : Cluster
**
: Sector
$$
: Track mode (Track information such as copyright infor-
mation 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.
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.
Procedure:
1. Insert the recordable disc.
2. Press MENU/NO button to display “Edit Menu” on the fluorescent display.
3. Turn l AMS L button to display “All Erase?” on the fluorescent display.
4. Press YES button to display “All Erase??” on the fluorescent display.
5. Press YES button, “Complete!” is displayed on the fluorescent display and it turns off immediately.
6. Procedure 1: Press the x button continuously for about 10 seconds.
1. Insert the recordable disc.
2. Press MENU/NO button to display “Edit Menu” on the fluorescent display.
3. Turn l AMS L button to display “All Erase?” on the fluorescent display.
4. Press YES button to display “All Erase??” on the fluorescent display.
5. Press YES button, “Complete!” is displayed on the fluorescent display and it turns off immediately.
6. Procedure 1: Press the x button continuously for about 10 seconds.
Procedure 2: Press the LEVEL/DISPLAY/CHAR button while pressing the x button and MENU/NO button.
7. When the mode is set, “RTs 00c 00e 000” is displayed.
8. Press the z REC button to start recording. Then press the X button and start recording.
9. To check the “track mode”, press the H button to start play.
10.To exit the test mode, press the @/1 button, and turn OFF the power. When “TOC” disappears, disconnect the power plug from the outlet.
8. Press the z REC button to start recording. Then press the X button and start recording.
9. To check the “track mode”, press the H button to start play.
10.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 9.
} 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
Reading the Retry Cause Display
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
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