Temperature Correction; Laser Power Check - Sony MZ-R701 Service Manual
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Also See for MZ-R701:
- Operating instructions manual (132 pages) ,
- Limited warranty (1 page)
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MZ-R701/R701DPC
5-6. Temperature Correction
• Adjustment method of temperature correction
1. Select the manual mode of test mode, and set the mode num-
ber 014 (see page 13).
This set LCD display
SetTmp
: Adjusted value
2. Measure the ambient temperature.
[VOL +]
[VOL --]
3. Adjust with
,
(hexadecimal value) becomes the ambient temperature.
(Initial value: 14h = 20 °C, Adjusting range: 80h to 7fh (–128
°C to +127 °C)
4. Press the
X
key to write the adjusted value.
5-7. Laser Power Check
Connection :
Optical pick-up
objective lens
MAIN board
TP (+)
TP (–)
Checking Method :
1. Select the manual mode of test mode (see page 13), and set the
laser power adjusting mode (item number 010).
This set LCD display
Laser
2. Press the
.
key continuously until the optical pick-up
moves to the most inward track.
3. Open the cover and set the laser power meter on the objective
lens of the optical pick-up.
4. Press the
key, and set the laser MO read adjustment mode
N
(item number 011).
This set LCD display
LrefPw
: Adjusted value
5. Check that the laser power meter reading is 0.81 ± 0.08 mW.
6. Check that the voltage both ends (TP (+) and TP (–)) of resis-
tor R521 at this time is below 44 mV.
20
0 14
key so that the adjusted value
laser
power meter
digital
voltmeter
0 10
0 11
7. Press the
key, and set the laser CD read adjustment
N
mode (item number 012).
This set LCD display
HrefPw
: Adjusted value
8. Check that the laser power meter reading is 0.97 ± 0.10 mW.
9. Check that the voltage both ends (TP (+) and TP (–)) of resis-
tor R521 at this time is below 44 mV.
10. Press the
N
key, and set the laser MO write adjustment mode
(item number 013).
This set LCD display
WritPw
: Adjusted value
11. Check that the laser power meter reading is 4.95 ± 0.50 mW.
12. Check that the voltage both ends (TP (+) and TP (–)) of resis-
tor R521 at this time is below 80 mV.
13. Press the
key to quit the manual mode, and activate the
x
test mode (display check mode).
Adjustment/checking and Connection Location:
–MAIN BOARD (SIDE A)–
TP902 (VL)
TP901 (VC)
TP912 (GND)
0 12
0 13
R521
TP (+)
TP (–)
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