Sony MZ-R90/R91 ユーザーズマニュアル

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• Adjustment method of VC PWM Duty (L)
(mode number: 762)
1. Select the manual mode of the test mode, and set the mode
number 762. (See page 14)
2. Connect a digital voltmeter to the TP915 (VC) on the MAIN
board, and adjust 
[VOL +]
 key (voltage up) or 
[VOL --]
 key
(voltage down) so that the voltage becomes 2.5 ± 0.02 V.
Proceed to the next step, if voltage is already adjusted.
3. Press the X key to write the adjusted value.
• Adjustment method of VREM PWM Duty (H)
(mode number: 763)
1. Select the manual mode of the test mode, and set the mode
number 763. (See page 14)
2. Connect a digital voltmeter to the TP914 (VR) on the MAIN
board, and adjust 
[VOL +]
 key (voltage up) or 
[VOL --]
 key
(voltage down) so that the voltage becomes 2.75 ± 0.02 V.
Proceed to the next step, if voltage is already adjusted.
3. Press the X key to write the adjusted value.
• Adjustment method of VREM PWM Duty (L)
(mode number: 764)
1. Select the manual mode of the test mode, and set the mode
number 764. (See page 14)
2. Connect a digital voltmeter to the TP914 (VR) on the MAIN
board, and adjust 
[VOL +]
 key (voltage up) or 
[VOL --]
 key
(voltage down) so that the voltage becomes 2.5 ± 0.02 V.
Proceed to the next step, if voltage is already adjusted.
3. Press the X key to write the adjusted value.
V c l P W M
762
LCD display
digital 
voltmeter
MAIN board
TP915 (VC)
TP5105 (GND)
V r h V c l
763
LCD display
digital 
voltmeter
MAIN board
TP914 (VC)
TP5105 (GND)
V r l V c l
764
LCD display
digital 
voltmeter
MAIN board
TP914 (VC)
TP5105 (GND)
• Adjustment method of VC PWM Duty (H)
(mode number: 765)
1. Select the manual mode of the test mode, and set the mode
number 765. (See page 14)
2. Connect a digital voltmeter to the TP915 (VC) on the MAIN
board, and adjust 
[VOL +]
 key (voltage up) or 
[VOL --]
 key
(voltage down) so that the voltage becomes 2.5 ± 0.02 V.
Proceed to the next step, if voltage is already adjusted.
3. Press the X key to write the adjusted value.
• Adjustment method of VREM PWM Duty (H)
(mode number: 766)
1. Select the manual mode of the test mode, and set the mode
number 766. (See page 14)
2. Connect a digital voltmeter to the TP914 (VR) on the MAIN
board, and adjust 
[VOL +]
 key (voltage up) or 
[VOL --]
 key
(voltage down) so that the voltage becomes 2.75 ± 0.02 V.
Proceed to the next step, if voltage is already adjusted.
3. Press the X key to write the adjusted value.
• Adjustment method of VREM PWM Duty (L)
(mode number: 767)
1. Select the manual mode of the test mode, and set the mode
number 767. (See page 14)
2. Connect a digital voltmeter to the TP914 (VR) on the MAIN
board, and adjust 
[VOL +]
 key (voltage up) or 
[VOL --]
 key
(voltage down) so that the voltage becomes 2.5 ± 0.02 V.
Proceed to the next step, if voltage is already adjusted.
3. Press the X key to write the adjusted value.
V c h P W M
765
LCD display
digital 
voltmeter
MAIN board
TP915 (VC)
TP5105 (GND)
V r h V c h
766
LCD display
digital 
voltmeter
MAIN board
TP914 (VC)
TP5105 (GND)
V r l V c h
767
LCD display
digital 
voltmeter
MAIN board
TP914 (VC)
TP5105 (GND)