Onkyo TX-NR906 Service Manual page 161

SERVICE PROCEDURE-1
1. Replacing the fuses
This symbol located near the fuse indicates that the
fuse used is show operating type, For continued protection against
fire hazard, replace with same type fuse, For fuse rating, refer to
the marking adjacent to the symbol.
Ce symbole indique que le fusible utilise est e lent.
Pour une protection permanente, n'utiliser que des fusibles de meme
type. Ce demier est indique la qu le present symbol est apposre.
<Notes>
<DC> : TX-NR906 USA and Canadian model
<DD> : TX-NR906 USA model
<DT> : TX-NR906 Taiwanese model
REF NO. PART NAME
F2501 FUSE
F2502 FUSE
F6601 FUSE
F6602 FUSE
F6603 FUSE
F6604 FUSE
F9000 FUSE
F9100 FUSE
F9100 FUSE
F9101 FUSE
F9102 FUSE
F9201 FUSE
F9202 FUSE
F9301 FUSE
F9301 FUSE
2. To initialize the unit
1. Press and hold down VCR/DVR button, then press ON/STANDBY button when the unit is powered on.
2. After " C l ear " is displayed, the preset memory and each mode stored in the memory are initialized and will
return to the factory settings, and turn to Standby mode.
3. Safety check out
(U.S.A. model only)
After correcting the original service problem, perform the following safety check before releasing the unit to
the customer.
Leakage current Check
Measure the leakage current to a known earth ground (water pipe or conduct etc.) by connecting a leakage current
tester between the earth ground and exposed metal parts of the unit (input/output ground terminals, screw heads or
metal overlays etc.).
Plug the power supply cord directly into a 120Vac 60Hz wall socket and turn ON/STANDBY button on.
Any current measured must not exceed 0.5mA.
4. Memory Backup
This model uses a EE-PROM IC in order to retain radio presets and other settings. So, memory contents will be
kept eternally with no care.
. 5 Replacing HDMI Board (NAHDM-9114)
When removing HDMI board (NAHDM-9114) from the unit, wait 10 minutes after having unplugged the power
supply cord from a wall socket. This is because the perfect discharging of capacitos connected to U8000(VX-50) is
necessary to prevent from the break of VX-50.
Pay attention that this procedure is necessary every time when removing the HDMI board in testing or repairing
the board.
To make this procedure short, wait 15 seconds after having unplugged the power supply cord, then short TP1
(located beside J8002B) and unplug J8002B, and then unplug P2801B. If this order is not right, VX-50 would break.
<MP> : TX-NR906 European model
<MT> : TX-NR906 Asian model for 220V-240V
<MR> : TX-NA906 Chinese model
DESCRIPTION PART NO.
4A-UL/T-233 252325GR
4A-UL/T-233 252325GR
20A-UL-250V 252304GR
20A-UL-250V 252304GR
20A-UL-250V 252304GR
20A-UL-250V 252304GR
252326GR
5A-UL/T-233
12A-UL-ST6 252340GR
6.3A-SE-EAK 252079GR
4A-UL/T-233 252325GR
4A-UL/T-233 252325GR
2.5A-UL/T-233 252321GR
2.5A-UL/T-233 252321GR
2.5A-UL/T-233 252321GR
4A-UL/T-233 252325GR
www.audiodna.sk
REMARKS
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TX-NR906/NA906