A-9010
ADJUSTMENT PROCEDURE
Idling Current
DC Voltmeter
Front
L / R
Below
Between
Over
7.5 mV
8 mV(+0.5 / -0.5 mV)
8.5 mV
7.5 mV
Do not adjust.
8.5 mV
Main PC board
Channel
Terminals
Registers
Voltage
L
CN04
VR41
8 mV
R
CN03
VR31
8 mV
Time
4 - 6 minutes
CN03, CN04
VR41
CN04
VR31
CN03
When
1. Exchange the transistor (Q308-Q310, Q315, Q316, Q408-Q410, Q415, Q416).
2. Exchange the Main PC board.
3. Exchange the Power transformer (main).
Setting position
BASS, TREBLE and BALANCE: Center. VOLUME: M
inimum
.
Procedure
a. Pre-adjustment
Set the following registers to minimum position before POWER ON.
Set the voltages at the following terminals to the following voltage by adjusting the following registers,
under the condition of no input and no load, immediately after POWER ON.
b. Aging
Heat run during the following time.
c. Final adjustment
Re-adjust by the following procedure after heat running for the above mentioned time.
Adjustment point / Test terminal
Connection
