Sony MZ-R909 Service Manual page 19

7) Select the manual mode of the test mode, and set item number
863 (see page 13).
Remote commander LCD display
863 V2num
** : Adjusted value
[VOL+]
8) Adjust with the key (adjusted value up) or
key (adjusted value down) so that the adjusted value becomes
87.
9) Press the key to write the adjusted value.
X
10) Select the manual mode of the test mode, and set item number
864 (see page 13).
Remote commander LCD display
864 V2dat
** : Adjusted value
[VOL+]
11) Adjust with the key (adjusted value up) or
key (adjusted value down) so that the adjusted value becomes
39.
12) Press the X key to write the adjusted value.
13) Select the manual mode of the test mode, and set item number
865 (see page 13).
Remote commander LCD display
865 V3num
** : Adjusted value
[VOL+]
14) Adjust with the key (adjusted value up) or
key (adjusted value down) so that the adjusted value becomes
23.
15) Press the key to write the adjusted value.
X
16) Select the manual mode of the test mode, and set item number
866 (see page 13).
Remote commander LCD display
866 V3dat
** : Adjusted value
[VOL+]
17) Adjust with the key (adjusted value up) or
key (adjusted value down) so that the adjusted value becomes
EC.
18) Press the X key to write the adjusted value.
Power Supply Manual Adjustment
• Adjustment sequence
Adjustment must be done with the following steps.
1. Vc PWM Duty (L) adjustment (item number: 762)
r
2. Vc PWM Duty (H) adjustment (item number: 763)
r
3. Vl PWM Duty adjustment (item number: 764)
• Setting method of power supply manual adjustment
1. Make sure that the power supply voltage is 3V.
2. Set the test mode (see page 12).
[VOL--]
3. Press the or
.
mode.
Remote commander LCD display
000 Assy00
**
[VOL--]
**
[VOL--]
**
[VOL--]
**
[VOL--]
key to activate the overall adjustment
4. Turn the jog dial (up), or press the
remote commander.
(Turning the jog dial (up), or pressing the
on the remote commander causes the item number to be
switched to 762)
• Adjustment method of Vc PWM Duty (L)
(item number: 762)
Remote commander LCD display
762 Vc1PWM **
** : Adjusted value
1. Connect a digital voltmeter to the AP914 (VC) on the MAIN
[VOL +]
board, and adjust
(voltage down) so that the voltage becomes 2.40
MAIN board
AP914 (VC)
AP912 (GND)
2. Press the key to write the adjusted value.
X
(The item number changes to 763 when
Adjustment and Connection Location: MAIN board
• Adjustment method of Vc PWM Duty (H)
(item number: 763)
Remote commander LCD display
763 VchPWM **
** : Adjusted value
1. Connect a digital voltmeter to the AP914 (VC) on the MAIN
[VOL +]
board, and adjust
(voltage down) so that the voltage becomes 2.75 ± 0.015 V.
MAIN board
AP914 (VC)
AP912 (GND)
2. Press the key to write the adjusted value.
X
(The item number changes to 764 when
Adjustment and Connection Location: MAIN board
• Adjustment method of Vl PWM Duty
(item number: 764)
Remote commander LCD display
764 Vl PWM **
** : Adjusted value
1. Connect a digital voltmeter to the AP915 (VL) on the MAIN
[VOL +]
board, and adjust
(voltage down) so that the voltage becomes 2.30
MAIN board
AP915 (VL)
AP912 (GND)
MZ-R909
[PLAYMODE]
key on the
[PLAYMODE]
[VOL --]
key (voltage up) or
+ 0.005
V.
– 0.01
digital
voltmeter
key is pressed)
X
(see page 20)
[VOL --]
key (voltage up) or
digital
voltmeter
key is pressed)
X
(see page 20)
[VOL --]
key (voltage up) or
+ 0.005
V.
– 0.01
digital
voltmeter
key
key
key
key
19