Sony HMD-M11 Service Manual page 34

5-5. TEMPERATURE COMPENSATION OFFSET
ADJUSTMENT
Save the temperature data at that time in the non-volatile memory
as 25°C reference data.
Notes:
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 tempera-
ture.
Adjusting Method:
1. Press the = 0 button or ) + button and display
"TEMP ADJUST".
2. Press the YES button and select the "TEMP ADJUST" mode.
3. "TEMP = " and the current temperature a data will be dis-
played.
4. To save the data, press the YES button.
When not saving the data, press the NO button.
5. When the YES button is pressed, "TEMP=
be displayed for some time, followed by "TEMP ADJUST".
When the NO button is pressed, "TEMP ADJUST" will be
displayed immediately.
Specifications:
The temperature should be within "E0-EF", "F0-FF", "00-0F",
"10-1F" and "20-2F".
5-6. LASER POWER ADJUSTMENT
Connection:
CN110 pin 5 (I+3 V)
CN110 pin 4 (IOP)
Adjusting Method:
1. Set the laser power meter on the objective lens of the optical
pick-up. (When it cannot be set properly, press the VOL + but-
ton or VOL – button and move the optical pick-up.)
Connect the digital voltmeter to CN110 pin 5 (I+3 V) and
SAVE" will
CN110 pin 4 (IOP) of the BD board.
2. Press the = 0 button or ) + button and display
"LDPWR ADJUST".
(Laser power: for adjustment)
3. Press the YES button and display "LD 0.9 mW $
4. Press the = 0 button or ) + button so that the
reading of the laser power meter becomes 0.82 to 0.91 mW.
Set the range control on the laser power meter to 10 mW, then
press the YES button to save the adjustment result in the non-
volatile memory.
("LD SAVE $
5. Then "LD 7.0 mW $
6. Press the = 0 button or ) + button so that the
reading of the laser power meter becomes 6.9 to 7.1 mW, press
the YES button and save the adjustment result in the non-
volatile memory.
("LD SAVE $
Note: Do not perform the emission with 7.0 mW more than 15
seconds continuously.
7. Press the = 0 button or ) + button and display
"LDPWR CHECK".
8. Press the YES button and display "LD 0.9 mW $
Check that the reading of the laser power meter becomes 0.80
to 0.96 mW.
9. Press the YES button and display "LD 7.0 mW $
Check that the reading of the laser power meter and digital
voltmeter satisfy the specified value.
Specification:
Laser power meter reading : 7.0 ± 0.2 mW
Digital voltmeter reading : Optical pick-up displayed value ±10%
10. Press the NO button and display "LDPWR CHECK", and
stop the laser emission.
(The NO button is effective at all times to stop the laser emis-
sion.)
– 34 –
laser
power meter
Optical pick-up
objective lens
digital voltmeter
BD board
+
–
" will be displayed for a moment.)
"will be displayed.
" will be displayed for a moment.)
(Optical pick-up label)
KMS260A
27X40
B0825
lOP=82.5 mA in this case
lOP (mA) = Digital voltmeter reading (mV)/1 ( Ω )
".
".
".