Sony MZ-N420D Service Manual page 21

• Adjustment Method of VREC_LOW (X2 speed)
(item number: 751)
Set LCD display
751
A D * *
** : Adjusted value
1. Connect a digital voltmeter to the TP1620 (VREC) on the
[VOLUME +]
MAIN board, and adjust
[VOLUME --]
key (voltage down) so that the voltage becomes
1.20 ± 0.02V.
MAIN board
TP1620 (VREC)
BATT – (GND)
2. Press the key to write the adjusted value.
ENTER/NX
Adjustment and Connection Location: MAIN board
• Adjustment Method of VREC_MIDDLE (X4 speed)
(item number: 752)
Set LCD display
752
A D * *
** : Adjusted value
1. Connect a digital voltmeter to the TP1620 (VREC) on the
[VOLUME +]
MAIN board, and adjust
[VOLUME --]
key (voltage down) so that the voltage becomes
1.20 ± 0.02V.
MAIN board
TP1620 (VREC)
BATT – (GND)
2. Press the key to write the adjusted value.
ENTER/NX
Adjustment and Connection Location: MAIN board
key (voltage up) or
digital
voltmeter
(see page 22)
key (voltage up) or
digital
voltmeter
(see page 22)
• Adjustment Method of VREC_HIGH (HEAD MOTOR)
(item number: 753)
Set LCD display
753
A D * *
** : Adjusted value
1. Connect a digital voltmeter to the TP1620 (VREC) on the
[VOLUME +]
MAIN board, and adjust
[VOLUME --]
key (voltage down) so that the voltage becomes
between 1.65V and 1.75V.
MAIN board
TP1620 (VREC)
BATT – (GND)
2. Press the key to write the adjusted value.
ENTER/NX
Adjustment and Connection Location: MAIN board
MZ-N420D
key (voltage up) or
digital
voltmeter
(see page 22)
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