34
Adjusting Procedure :
1. Set the laser power meter on the objective lens of the optical
pick-up. (When it cannot be set properly, press the
m
button
or
M
button to move the optical pick-up.)
Connect the digital volt meter to CN105 pin
1
(I+3V) and
CN105 pin
2
(IOP).
2. Rotate the MD JOG knob and display “LDPWR ADJUS” (C04).
(Laser power : For adjustment)
3. Press the ENTER/YES button once and display “LD 0.9 mW $
”.
4. Rotate the MD JOG knob so that the reading of the laser power
meter becomes 0.85 to 0.91 mW. Press the ENTER/YES but-
ton after setting the range knob of the laser power meter, and
save the adjustment results. (“LD SAVE $
” will be displayed
for a moment.)
5. Then “LD 7.0 mW $
” will be displayed.
6. Rotate the MD JOG knob so that the reading of the laser power
meter becomes 6.9 to 7.1 mW, press the ENTER/YES button
and save it.
Note :
Do not perform the emission with 7.0 mW more than 15
seconds continuously.
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 tempera-
ture.
Adjusting Procedure :
1. Rotate the MD JOG knob and display “TEMP ADJUS” (C03).
2. Press the ENTER/YES button and select the “TEMP ADJUS”
(C03) mode.
3. “TEMP =
[OK]” and the current temperature data will be
displayed.
4. To save the data, press the ENTER/YES button.
When not saving the data, press the MENU/NO button.
5. When the ENTER/YES button is pressed, “TEMP =
SAVE”
will be displayed and turned back to “TEMP ADJUS” (C03)
display then. When the MENU/NO button is pressed, “TEMP
ADJUS” (C03) will be displayed immediatelly.
Specified Value :
The “TEMP =
” should be within “E0 - EF”, “F0 - FF”, “00 -
0F”, “10 - 1F” and “20 - 2F”.
5-10. LASER POWER ADJUSTMENT
Check the Iop value of the optical pick-up before adjustments.
(Refer to 5-8. Recording and Displaying the Iop Information.)
Connection :
5-7. INITIAL SETTING OF ADJUSTMENT VALUE
Note:
Mode which sets the adjustment results recorded in the non-vola-
tile memory to the initial setting value. However the results of the
temperature compensation offset adjustment will not change to the
initial setting value.
If initial setting is performed, perform all adjustments again ex-
cluding the temperature compensation offset adjustment.
For details of the initial setting, refer to “5-4. Precautions for Ad-
justments” and execute the initial setting before the adjustment as
required.
Setting Procedure :
1. Rotate the MD JOG knob to display “ADJ CLEAR” (C28).
2. Press the ENTER/YES button. “Complete!” will be displayed
momentarily and initial setting will be executed, after which “ADJ
CLEAR” (C28) will be displayed.
5-8. RECORDING AND DISPLAYING THE Iop
INFORMATION
The IOP data can be recorded in the non-volatile memory. The Iop
value on the label of the optical pick-up 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. While pressing the MD JOG knob and
s
button, connect the
power plug to the outlet, and release the MD JOG knob and
s
button.
2. Rotate the MD JOG knob to display “[Service]”, and press the
ENTER/YES button.
3. Rotate the MD JOG knob to display “Iop Write” (C05), and
press the ENTER/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 MD JOG knob.
To select the digit : Press the MD JOG knob
6. When the ENTER/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 ENTER/YES button.
8. “Complete!” will be displayed momentarily. The value will be
recorded in the non-volatile memory and the display will be-
come “Iop Write” (C05).
Display Procedure :
1. Rotate the MD JOG knob to display “Iop Read” (C26).
2. “@@.@/##.#” is displayed and the recorded contents are dis-
played.
@@.@ indicates the Iop value labeled on the optical pick-up.
##.# indicates the Iop value after adjustment
3. To end, press the MD JOG button or MENU/NO button to
display “Iop Read” (C26).
5-9. TEMPERATURE COMPENSATION OFFSET
ADJUTMENT
Save the temperature data at that time in the non-volatile memory
as 25 ˚C reference data.
Laser power
meter
Optical pick-up
objective lens
Digital volt meter
BD (MD) board
CN105 pin
1
(I+3V)
CN105 pin
2
(IOP)
Summary of Contents for HMC-NX5MD
Page 44: ...44 44 HMC NX5MD 6 3 SCHEMATIC DIAGRAM CD SECTION Page 50 PIN FUNCTION ...
Page 47: ...47 47 HMC NX5MD 6 6 SCHEMATIC DIAGRAM MD SECTION 1 2 48 48 48 PIN FUNCTION ...
Page 48: ...48 48 HMC NX5MD 6 7 SCHEMATIC DIAGRAM MD SECTION 2 2 47 47 47 52 52 PIN FUNCTION ...
Page 49: ...49 49 HMC NX5MD 6 8 SCHEMATIC DIAGRAM MAIN SECTION 1 2 Page 52 Page 50 Page 50 ...
Page 52: ...52 52 HMC NX5MD 6 11 SCHEMATIC DIAGRAM DIGITAL SECTION Page 48 Page 48 Page 49 PIN FUNCTION ...
Page 54: ...54 54 HMC NX5MD 6 13 SCHEMATIC DIAGRAM PANEL SECTION Page 50 ...