Sony MZ-N420D Service Manual page 19

• Adjustment Method of VC1_LOW (PB)
(item number: 741)
Set LCD display
741
A D * *
** : Adjusted value
1. Connect a digital voltmeter to the TP1928 (VCO1) on the MAIN
[VOLUME +]
board, and adjust
key (voltage down) so that the voltage becomes 2.35 ± 0.05V.
MAIN board
TP1928 (VCO1)
BATT – (GND)
2. Press the key to write the adjusted value.
ENTER/NX
Adjustment and Connection Location: MAIN board
• Adjustment Method of VC1_HIGH (REC)
(item number: 742)
Set LCD display
742
A D * *
** : Adjusted value
1. Connect a digital voltmeter to the TP1928 (VCO1) on the
[VOLUME +]
MAIN board, and adjust
[VOLUME --]
key (voltage down) so that the voltage becomes
2.50 ± 0.05V.
MAIN board
TP1928 (VCO1)
BATT – (GND)
2. Press the key to write the adjusted value.
ENTER/NX
Adjustment and Connection Location: MAIN board
[VOLUME --]
key (voltage up) or
digital
voltmeter
(see page 22)
key (voltage up) or
digital
voltmeter
(see page 22)
• Adjustment Method of VC2_LOW
(item number: 743)
Set LCD display
743
A D * *
** : Adjusted value
1. Connect a digital voltmeter to the TP1905 (VCOUT) on the
[VOLUME +]
MAIN board, and adjust
[VOLUME --]
key (voltage down) so that the voltage becomes
2.30 ± 0.01V.
MAIN board
TP1905 (VCOUT)
BATT – (GND)
2. Press the key to write the adjusted value.
ENTER/NX
Adjustment and Connection Location: MAIN board
• Adjustment Method of VC2_HIGH
(item number: 744)
Set LCD display
744
A D * *
** : Adjusted value
1. Connect a digital voltmeter to the TP1905 (VCOUT) on the
[VOLUME +]
MAIN board, and adjust
[VOLUME --]
key (voltage down) so that the voltage becomes
2.55 ± 0.01V.
MAIN board
TP1905 (VCOUT)
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)
key (voltage up) or
digital
voltmeter
(see page 22)
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