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MZ-R909
7. Press the N key, and set the laser CD read adjustment
mode (item number 012).
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 resistor
R521 at this time is below 44 mV.
10. Press the N key, and set the laser MO write adjustment mode
(item number 013).
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 resistor
R521 at this time is below 80 mV.
13. Press the x key to quit the manual mode, and activate the
test mode (display check mode).
Checking and Connection Location: MAIN board
Adjustment/checking and Connection Location:
2. When press the X key to write the adjusted value, LCD dis-
plays as follows and power supply manual adjustment has com-
pleted.
Adjustment and Connection Location:MAIN board
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).
2. Measure the ambient temperature.
3. Adjust with [VOL +], [VOL --] key so that the adjusted value
(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.
000 ADJ OK
Remote commander LCD display
014 SetTmp **
Remote commander LCD display
**
: Adjusted value
Laser Power Check
Connection :
Checking Method :
1. Select the manual mode of test mode (see page 13), and set the
laser power adjusting mode (item number 010).
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 N key, and set the laser MO read adjustment mode
(item number 011).
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.
digital voltmeter
MAIN board
laser
power meter
Optical pick-up
objective lens
TP (+)
TP (–)
010 Laser
Remote commander LCD display
012 HrefPw **
Remote commander LCD display
013 WritPw **
Remote commander LCD display
R317
C211
C118
C117
R118
C217
R319
C344
C906
R941
R909
C908
C337
C921
C905
R902
R815
C338
C335
R104
R105
C836
C107
R846
R203
R205
R204
C329
FB301
FB302
FB303
FB304
FB305
FB306
14
K
K
A
85
R101
C218
C304
C306
R305
R304
C914
C504
C501
C915
R519
C932
R911
R906
C605
R603
C633
C602 R602
C561
C913
C302
R920
C521
R501
R502
R507
C503
C526
C505
C506
C507
C566
C5
2
C926
C917
R946
R947
R926
R948
C837
R936
C601
R318
R212
C314
R201
R309R303
R816
R905
R910
R813
R915
R811
R103
C207
C839
C825
R903
R301
C922
C202
C116
C318
C210
C112
C212
C201
C110
C336
C101
C924
C923
C925
R211
C111
R111
C340
C330
R302
R306
R307
R112
R218
C216
C102
L303
R850
R521
R622
Q302
G
D
S
C323
+
C320
+
C303
+
C305
+
C524
+
C518
+
C904
+
C919
+
C920
+
C529
+
C315
+
C911
+
C316
+
C105
+
C205
+
D301
D302
Q803
B
C
E
Q801
C301
+
L302
L301
L501
L502
D902
AK
Q501
B
C
E
CN502
CN801
F801
D605
AK
D602
AK
TH601
D901
AK
D904
AK
D903
D303
KA
AK
C902
+
C901
+
1
1
8
16
9
5
8
16
13
4
129
1
1
114
42 29
28
15
43
56
14
4229
15
28
56
43
5
8
16
13
4
12
9
IC303
IC301
IC901
IC551
IC302
1 5 10 15 19
110
SWITCH
&
LCD MODULE
DC IN 3V
–
+
J601
DRY BATTERY
SIZE “AA”
(IEC DESIGNATION R6)
1PC. 1.5V
(BATTERY CASE)
C1 C2
B1EB2
AP912 (GND) AP914 (VC)
AP915 (VL)
TP (
–
)
TP (
+
)
– MAIN Board (Conductor side) –
011 LrefPw **
Remote commander LCD display