Sony MZ-E505 Service Manual page 23

5-6-2. LED voltage adjustment
Note: This adjustment performed only when the judgment result
of judging LED voltage value is OK or NG is NG
(See page 22).
Connection:
digital
voltmeter
MAIN board
TP902 (VCOUT)
TP815 (LEDADJ)
Procedure:
1. Set the Manual mode and set the item No. to 071.
LCD display
071 Red35H XX
XXX: A/D value.
2. Connect a digital voltmeter to TP902 (VCOUT) and TP815
(LEDADJ) on the MAIN board and adjust with VOL + (Volt-
age up) and VOL – (Voltage down) so that the voltage be-
comes standard value.
Standard value: 0.500 to 1.100 mV
3. Press X key to write the adjustment value.
4. Set the Manual mode and set the item No. to 075.
LCD display
075 GRN35H XX
XXX: A/D value.
5. Connect a digital voltmeter to TP902 (VCOUT) and TP815
(LEDADJ) on the MAIN board and adjust with VOL + (Volt-
age up) and VOL – (Voltage down) so that the voltage be-
comes standard value.
Standard value: 2.300 to 4.500 mV
6. Press X key to write the adjustment value.
Connecting Location:
– MAIN BOARD (Component Side) –
IC301
TP901
TP815
(VC)
(LEDADJ)
TP902
(VCOUT)
IC601
IC901
TP904
TP921
(VL)
(GND)
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MZ-E505