Sony MZ-N707 OpenMG Jukebox NOTES on installing & operating Service Manual page 22

MZ-N707
55) Select manual mode of the test mode, and set item number
873 (see page 14).
Set LCD display
8 73
: Adjusted value
[VOL +]
56) Adjust with the
key (adjusted value down) so that the adjusted value becomes
BB.
57) Press the X key to write the adjusted value.
58) Select manual mode of the test mode, and set item number
874 (see page 14).
Set LCD display
8 74
: Adjusted value
[VOL +]
59) Adjust with the
key (adjusted value down) so that the adjusted value becomes
05.
60) Press the key to write the adjusted value.
X
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 (L) adjustment (item number: 764)
r
4. Vl PWM Duty (H) adjustment (item number: 765)
r
5. Vrec PWM Duty (L) adjustment (item number: 766)
r
6. Vrec PWM Duty (H) adjustment (item number: 767)
• Setting Method of Power Supply Manual Adjustment
1. Make sure that the power supply voltage is 3V.
2. Select the manual mode of the test mode (see page 14).
3. Set item number.
22
[VOL --]
key (adjusted value up) or
[VOL --]
key (adjusted value up) or
• Adjustment Method of Vc PWM Duty (L)
(item number: 762)
Set LCD display
7 62
: Adjusted value
1. Connect a digital voltmeter to the AP912 (VCO) on the MAIN
[VOL +]
board, and adjust key (voltage up) or
age down) so that the voltage becomes 2.40
MAIN board
AP912 (VCO)
AP602 (GND)
2. Press the X key to write the adjusted value.
Adjustment and Connection Location: MAIN board
• Adjustment Method of Vc PWM Duty (H)
(item number: 763)
Set LCD display
7 63
: Adjusted value
1. Connect a digital voltmeter to the AP912 (VCO) on the MAIN
[VOL +]
board, and adjust
(voltage down) so that the voltage becomes 2.75
MAIN board
AP912 (VCO)
AP602 (GND)
2. Press the key to write the adjusted value.
X
Adjustment and Connection Location: MAIN board
[VOL --]
key (volt-
0.05 V.
digital
voltmeter
(see page 25)
[VOL --]
key (voltage up) or
0.05 V.
digital
voltmeter
(see page 25)
key