Sony MZ-N707 OpenMG Jukebox NOTES on installing & operating Service Manual page 23

• Adjustment Method of Vl PWM Duty (L)
(item number: 764)
Set LCD display
7 64
: Adjusted value
1. Connect a digital voltmeter to the AP913 (VLO) on the MAIN
[VOL +]
board, and adjust
(voltage down) so that the voltage becomes 2.30
MAIN board
AP913 (VLO)
AP602 (GND)
2. Press the X key to write the adjusted value.
Adjustment and Connection Location: MAIN board
• Adjustment Method of Vl PWM Duty (H)
(item number: 765)
Set LCD display
7 65
: Adjusted value
1. Connect a digital voltmeter to the AP913 (VLO) on the MAIN
[VOL +]
board, and adjust
(voltage down) so that the voltage becomes 2.55
MAIN board
AP913 (VLO)
AP602 (GND)
2. Press the key to write the adjusted value.
X
Adjustment and Connection Location: MAIN board
[VOL --]
key (voltage up) or
0.01 V.
digital
voltmeter
(see page 25)
[VOL --]
key (voltage up) or
0.01 V.
digital
voltmeter
(see page 25)
• Adjustment Method of Vrec PWM Duty (L)
(item number: 766)
Set LCD display
7 66
: Adjusted value
1. Connect a digital voltmeter to the TP (VREC) on the MAIN
key board, and adjust
(voltage down) so that the voltage becomes 1.13
MAIN board
TP (VREC)
AP602 (GND)
2. Press the X key to write the adjusted value.
Adjustment and Connection Location: MAIN board
• Adjustment Method of Vrec PWM Duty (H)
(item number: 767)
Set LCD display
7 67
: Adjusted value
1. Connect a digital voltmeter to the TP (VREC) on the MAIN
key board, and adjust
(voltage down) so that the voltage becomes 1.65 to 1.75 V.
MAIN board
TP (VREC)
AP602 (GND)
2. Press the key to write the adjusted value.
X
Adjustment and Connection Location: MAIN board
MZ-N707
[VOL +]
key (voltage up) or
digital
voltmeter
(see page 25)
[VOL +]
key (voltage up) or
digital
voltmeter
(see page 25)
[VOL --]
key
0.02 V.
[VOL --]
key
23