Sony MDS-E10 Service Manual page 56

5. Press the MENU/NO button to display "LDPWR CHECK"
and stop the laser emission.
(The MENU/NO button is effective at all times to stop the
laser emission)
Note: After step 4, each time the YES button is pressed, the display will
be switched "LD 0.7 mW $
$ ". Nothing needs to be performed here.
4-4-3. Iop Compare
The current IOP value when 7 mW laser power is output and the
reference IOP value (normally, the value when shipped from the
factory) written in the non-volatile memory are compared and the
degree of increase or decrease is shown as a percentage.
Note: Do the following operation when the temperature of the optical
pick-up is almost the same as room temperature.
Operation Procedure:
1. Turn the l AMS L knob to display "Iop Compare".
2. Press the YES button to start measurement.
3. After the measurement is complete, the display changes to
"±xx% yy". "xx" indicates the degree of increase or decrease.
OK or NG is shown in "yy", which indicates whether the
increase or decrease is acceptable.
4. Press the MENU/NO button to end Iop Compare.
4-4-4. AUTO CHECK
This test mode automatically performs C-REC and C-PLAY and
checks mainly the characteristics of the optical pick-up. To execute
the test mode, first check the laser power and perform AUTO
CHECK after Iop Compare.
Operation Procedure:
1. Press the YES button. If "LDPWR
means the laser power has not been checked, first check the
laser power and perform Iop Compare. Then, repeat this step.
2. If there is a disc in the mechanism deck, the disc is forcibly
ejected. After "DISC IN" appears, load a recordable test disc
(MDW-74/GA-1).
3. When the disc is loaded in step 2, the check automatically starts.
4. While "XX CHECK" is displayed, the check of the item shown
in "XX" is in progress.
After "06 check" is complete, eject the disc loaded in step 2.
When "DISC IN" appears, load the TDYS-1 check disc (MD).
5. After the disc is loaded, the check automatically restarts from
"07 CHECK".
6. After the check of item 12 is complete, "OK" or "NG" appears.
When all items are OK, "CHECK ALL OK" appears. If even
one of the items failed, "NG: xxxx" appears.
When "CHECK ALL OK" appears, there is no problem in the optical
pick-up, Check the operations of the spindle motor, sled motor, etc.
If "NG: xxxx" appears, there is an abnormality in the optical pick-
up. Replace the optical pick-up.
", "LD 6.2 mW $ ", and "LD Wp
" appears, which
— 56 —
4-5. RECORDING AND DISPLAYING THE IOP
INFORMATION
The IOP data can be recorded in the non-volatile memory. The IOP
value on the optical pick-up label and the IOP value after the
adjustment will be recorded. Recording these data eliminates the
need to read the label on the optical pick-up.
Recording Procedure :
1. Turn the l AMS L knob to display "Iop Write" (C05),
and press the YES button.
2. The display becomes Ref=@@@/@ (@ is an arbitrary number)
and the numbers which can be changed will blink.
3. Input the IOP value on the optical pick-up label.
To select the number : Turn the l AMS L knob.
To select the digit : Press the l AMS L knob
4. When the YES button is pressed, the display becomes
"Measu=@@@.@" (@ is an arbitrary number).
5. As the adjustment results are recorded for the 6 value. Leave it
as it is and press the YES button.
6. "Complete!" will be displayed momentarily. The value will be
recorded in the non-volatile memory and the display will
become "Iop Write".
Display Procedure :
Turn the l AMS L knob to display "Iop Read"(C26).
1.
2. "@@.@/##.#" is displayed and the recorded contents are
displayed.
@@.@ indicates the IOP value on the optical pick-up label.
##.# indicates the IOP value after adjustment
To end, press the l AMS L button or MENU/NO
3.
button to display "Iop Read".
4-6. TEMPERATURE COMPENSATION OFFSET
ADJUSTMENT
Save the temperature data at that time in the non-volatile memory
as 25 ˚C reference data.
Note: 1. Usually, do not perform this adjustment.
2. Perform this adjustment in an ambient temperature of 22 ˚C to
28 ˚C. Perform it immediately after the power is turned on when
the internal temperature of the unit is the same as the ambient
temperature of 22 ˚C to 28 ˚C.
3. When D101 has been replaced, perform this adjustment after
the temperature of this part has become the ambient temperature.
Adjusting Procedure :
Turn the l AMS L knob to display "TEMP ADJUS"
1.
(C03).
2. Press the YES button to select the "TEMP ADJUS" mode.
3. "TEMP = [OK" and the current temperature data will be
displayed.
4. To save the data, press the YES button.
When not saving the data, press the MENU/NO button.
5. When the YES button is pressed, "TEMP =
displayed and turned back to "TEMP ADJUS" display then.
When the MENU/NO button is pressed, "TEMP ADJUS"
will be displayed immediately.
Specified Value :
The "TEMP = " should be within "E0 - EF", "F0 - FF", "00 -
0F", "10 - 1F" and "20 - 2F".
SAVE" will be