18
MZ-R900
• Adjustment method of Vc PWM Duty (L)
(item number: 762)
1. Connect a digital voltmeter to the AP914 (VC) on the MAIN
board, and adjust [VOL +] key (voltage up) or [VOL --] key
(voltage down) so that the voltage becomes 2.40 V.
2. Press the X key to write the adjusted value.
(The item number changes to 763 when X key is pressed)
Adjustment and Connection Location:MAIN board
(see page 19)
• Adjustment method of Vc PWM Duty (H)
(item number: 763)
1. Connect a digital voltmeter to the AP914 (VC) on the MAIN
board, and adjust
[VOL +] key (voltage up) or [VOL --] key
(voltage down) so that the voltage becomes 2.75 ± 0.015 V.
2. Press the
X key to write the adjusted value.
(The item number changes to 764 when X key is pressed)
Adjustment and Connection Location:MAIN board
(see page 19)
• Adjustment method of Vl PWM Duty
(item number: 764)
1. Connect a digital voltmeter to the AP915 (VL) on the MAIN
board, and adjust
[VOL +] key (voltage up) or [VOL --] key
(voltage down) so that the voltage becomes 2.30 V.
digital
voltmete
MAIN board
AP914 (VC)
AP912 (GND)
digital
voltmete
MAIN board
AP914 (VC)
AP912 (GND)
digital
voltmete
MAIN board
AP915 (VL)
AP912 (GND)
762 Vc1PWM **
Remote commander LCD display
**
: Adjusted value
763 VchPWM **
Remote commander LCD display
**
: Adjusted value
764 Vl PWM **
Remote commander LCD display
**
: Adjusted value
7) Select the manual mode of the test mode, and set item number
871 (see page 13).
8) Adjust with the [VOL+] key (adjusted value up) or [VOL--]
key (adjusted value down) so that the adjusted value becomes
20.
9) Press the X key to write the adjusted value.
10) Select the manual mode of the test mode, and set item number
872 (see page 13).
11) Adjust with the [VOL+] key (adjusted value up) or [VOL--]
key (adjusted value down) so that the adjusted value becomes
39.
12) 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).
3. Press the
. or [VOL--] key to activate the overall adjustment
mode.
4. Press the [JOG LEVER $L% ] (down) key, or [PLAYMODE] key
on the remote commander.
(Pressing the [JOG LEVER $L% ] (down) key, or [PLAYMODE]
key on the remote commander causes the item number to be
switched to 762.)
871 V5num **
Remote commander LCD display
**
:Adjusted value
872 V5dat **
Remote commander LCD display
**
:Adjusted value
Remote commander LCD display
000 Assy00
r
r
+ 0.005
– 0.01
+ 0.005
– 0.01
