Adjustment; Balance Of ±6V On The Power Supply Pc Board; Off-Set Of Final Vca On The Voice Pc Board - Akai AX60 Service Manual

VI. ADJUSTMENT
6-1. BALANCE OF ± 6V ON THE POWER SUPPLY PC BOARD
1) Connect a Digital DC Voltmeter between Pin [T]
(+6V) and Pin 0 (GND) of connector P4 on the
POWER SUPPLY PCB as shown Fig. 6-1.
2) Read the + Voltage Value at the Pin [T|, and connect a
Fig. 6-1 POWER SUPPLY PCB Adjustment Points
Digital DC Voltmeter to Pin [4].
3) Adjust VRI so that the Voltage Value at Pin |
Pin GQ are equal or within ± 0.1V.
land
6-2. OFF-SET OF FINAL VCA ON THE VOICE PC BOARD
TP.O <J
piC44
0
TP2
FOFF SET
IC42
JiVRS
J/OFF SET
1) Set the ENVELOPE GENERATOR to VCA mode
and set the EG DEPTH Control to maximum posi
tion.
2) Connect a Digital Voltmeter between TP1 and GND
Fig. 6-2 VOICE PCB Adjustment Points
and adjust VR7 so that the Digital Voltmeter Read 0
±2mV.
3) Connect a Digital Voltmeter between TP2 and GND
and adjust VR8 as same manner as VR7.
-SERVICE MANUAL-