Onkyo A-9010 Service Manual

INTEGRA TED AMPLIFIER

MODEL A-9010(B)/(S)

8.PRGHOV

A-9010

Ref. No. 4516

032015

042015(WMB)

Black and Silver models

B WMP
B WMB
S WMP
B WDC
S WJJ

220-240V AC, 50/60Hz

120V AC, 60Hz
100V AC, 50/60Hz

RC-902S

SERVICE PROCEDURE

INITIAL SETTING FOR SHIPPING

Initialization of memories.
Hold down [DIRECT button and then press [ON/STANDBY] button.
Unplug the power cord after it goes standby mode.

A-9010

ADJUSTMENT PROCEDURE

Idling Current

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: Minimum.

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.

Channel
Terminals
Registers
Voltage

b. Aging

Heat run during the following time.

Time 4 - 6 minutes

L
CN04
VR41
8 mV

R
CN03
VR31
8 mV

A-9010

c. Final adjustment

Re-adjust by the following procedure after heat running for the above mentioned time.

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

Adjustment point / Test terminal

VR31

CN03

VR41

CN04

Front

Connection

DC Voltmeter

CN03, CN04

Main PC board

A-9010

A

EXPLODED VIEW - 1/2

(B): Black

1

2

BCDE

Q315, Q308, Q316, D901, Q415, Q408, Q416

FUSE

LABEL , HOT

3

A-9010

4