Sony MZ-R909 Service Manual page 20

MZ-R909
2. When press the key to write the adjusted value, LCD dis-
X
plays as follows and power supply manual adjustment has com-
pleted.
Remote commander LCD display
000 ADJ OK
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).
Remote commander LCD display
014 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 key to write the adjusted value.
X
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).
Remote commander LCD display
010 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).
Remote commander LCD display
011 LrefPw
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
key so that the adjusted value
laser
power meter
digital voltmeter
**
7. Press the key, and set the laser CD read adjustment
N
mode (item number 012).
Remote commander LCD display
012 HrefPw
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 key, and set the laser MO write adjustment mode
N
(item number 013).
Remote commander LCD display
013 WritPw
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:
– MAIN Board (Conductor side) –
AP912 (GND)
R317
C211
C118
C117 C112
4 1 R118
C212
5 16
IC303
1
8 13
9 12
IC301
R101
8
C217
C201
C306
C218
C304 C302
R319
L302 L301
+
C904
C344
D303
D903
K A
14
15
4 1
C906
R941
5 16
R909
8 13
R815
C908 C921
12
9 IC901
C905
R902
FB301 D904
A K
28
FB302
FB303
29
R850
FB304
C337
A K
FB305 C
D901
8 5
Q803
FB306
C901 +
D301
B E
K
1 4 A
C338
K
C335
D302
C329
R204
R205
B1 E B2
R104
R203
Q801
R105
C107 R846
C1 C2
C601
C836
1 5 10 15 19
A
CN801 D602
J601
SWITCH
DC IN 3V
&
LCD MODULE – +
**
**
AP914 (VC)
AP915 (VL)
CN502
10 1
C52
16 R305
42 29
R304 43 28
IC551
9
56 15
+ C301
1 14
C566
C521
R501
+ R502
R920 C529
R507
C503
C926
1
56
L501
C505
C526
C506
C507
C917
43
TP ( + )
42
+ C919
+ C902
+ C920
R946
R947
R926
R936 R948
TH601
D605
A K
R622
K
C837
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION R6)
1PC. 1.5V
(BATTERY CASE)
TP ( – )