Sony Walkman MZ-NF520D, Руководство по обслуживанию

Страница: 21 / 64

21
MZ-NF520D
• Adjustment Method of VREC_LOW (X2 speed)
(item number: 751)
1. Connect a digital voltmeter to the TP1620 (VREC) on the
MAIN board, and adjust
[]
key (voltage up) or
[VOLUME --]
key (voltage down) so that the voltage becomes
1.20 ± 0.02V.
2. Press the ENTER/ NX key to write the adjusted value.
Adjustment and Connection Location: MAIN board
(see page 22)
• Adjustment Method of VREC_MIDDLE (X4 speed)
(item number: 752)
1. Connect a digital voltmeter to the TP1620 (VREC) on the
MAIN board, and adjust
[]
key (voltage up) or
[VOLUME --]
key (voltage down) so that the voltage becomes
1.20 ± 0.02V.
2. Press the
ENTER/ NX
key to write the adjusted value.
Adjustment and Connection Location: MAIN board
(see page 22)
Set LCD display
**
: Adjusted value
A D * *
753
digital
voltmeter
TP1620 (VREC)
BATT – (GND)
MAIN board
Set LCD display
**
: Adjusted value
A D * *
751
digital
voltmeter
TP1620 (VREC)
BATT – (GND)
MAIN board
Set LCD display
**
: Adjusted value
A D * *
752
digital
voltmeter
TP1620 (VREC)
BATT – (GND)
MAIN board
• Adjustment Method of VREC_HIGH (HEAD MOTOR)
(item number: 753)
1. Connect a digital voltmeter to the TP1620 (VREC) on the
MAIN board, and adjust
[]
key (voltage up) or
[VOLUME --]
key (voltage down) so that the voltage becomes
between 1.65V and 1.75V.
2. Press the
ENTER/
NX key to write the adjusted value.
Adjustment and Connection Location: MAIN board
(see page 22)