Onkyo TXNR 646 Service Manual

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Ref.No. : 4520

AV RECIEVER 3 er Vi C 9 Manual

TX-NR646

V Front Cover This a e

V Pre Issue (15-May) V Note for Parts List
V Final Issue (15-Jun) V Panel
V Reset

V Amp Diaq Mode afterAbnormal Conditions
V Model and Destination
V Firmware
Adjustment ( Unnecessary)
V Hookug and Setting
V Trouble Shoot
V Disassembly
V Schematic Diagram
V Exploded View
V Apgendix

SAFETY-RELATED COMPONENT WARNINGI! {COMPONENTS IDENTIFIED BY MARK A ON
THE SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE CRITICAL FOR RISK OF FIRE AND
ELECTRIC SHOCK, REPLACE THESE COMPONENTS WITH DNKYD PARTS WHOSE PART
NUMBERS APPEAR AS SHOWN IN THIS MANUAL MAKE LEAKAGEVCURRENT OR
RESISTANCE MESUREMENTS TO DETERMINE THAT EXPOSED PARTS ARE ACCEPTABLY
INSULATED FROM THE SUPPLY CIRCUIT BEFORE RETURNING THE APPLIANCE TO THE
CUSTOMER,

ONKYO®

Published by Onkyo & Pioneer Corporation Grobal CS Department

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Operation Check Appendix

How to enter test mode
Step1 : Set the volume level as 25. (TX-NR545/646/DTR-20.7/30.7)
Set the volume level as 30. (TX-NR747/DTR-40.7)
Step2 : [TV] + [ON/STANDBY]
Display TEST-_

How to check FL Display
Step1 : Set VOL Level = 25
Step2 : [TV] + [ON/STANDBY] a [DIMMER] or [RT/PTY/TP]

Step3 : Press the followtng button, while TEST - Is displayed, then each test mode Is set. Lit all Segment.

1-00 2-00 3-00 4-00 5-00 6-00
BD/DVD CBL/Sat STRM PC GAME AUX Step3 : [TONE +]
BOX

Lit '23456789ABCDEF'.
How to check buttons and Master Volume Operation
Step1 Step4 : [TONE +]

Set the following test mode and confirm each buttons and master volume operation.
[Test mode (TEST 1-06) [TV] + [ON/STANDBY] a [BD/DVD] a [TONE +] x 6 I

Lit a even number segment.

Step2
lf ON/STANDBY" button is pressed, AVR escapes from this button test mode. Step5 : [TONE +]
Therefor. press the "ON/STANDBY button. after checking other buttons finished
HOW to check Output sensor Lit an odd number segment.

Step1 : Low Detect check

When set the following test mode , if FL tube display "OK" then this check is passed. Step6 I [TONE +1

Test mode (TEST 1-07) [TV] + [ON/STANDBY] a [BD/DVD] a [TONE +] x7
Relay RL6430 and RL644O

>00 0K F:xs:L'

Step2 : High Detect check

The Destination setting is displayed.

When set the following test mode , if FL tube display OK then this check is passed.

Test mode (TEST 1-08) [TV] + [ON/STANDBY] a [BD/DVD] a [TONE +] x8
Relay RL6430 and RL644O

TX-NR545/646/747
DTR-20.7/30.7/40.7
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