Service Procedure; Replacing The Fuses; To Initialize The Unit; Memory Backup - Onkyo TX-SR603 Service Manual

SERVICE PROCEDURE

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-SR603 Canadian model
<DD> : TX-SR603 American model
<GK> : TX-SR603 Korean model
<GQ> : TX-SR603 Hong kong model
<GR> : TX-SR603 Chinese model
REF NO. PART NAME
F901 FUSE
F901 FUSE
F901 or FUSE
F901 or FUSE
F902 FUSE
F902 or FUSE
F902 or FUSE
F903 FUSE
F903 or FUSE
F903 FUSE
F903 or FUSE
F903 or FUSE
F6901 FUSE
F6901 or FUSE
F6902 FUSE
F6902 or FUSE
F9501 FUSE
F9501 or FUSE
F9501 or FUSE

2. To initialize the unit

1. Press and the hold down the VIDEO 1/VCR button, then press the STANDBY/ON button when the unit is Power on.
2. After " Cl ea r " is displayed, the preset memory and each mode stored in the memory, are initialized and will return to
the factory settings.
3. To check version of microprocessor
Main microprocessor Q701 only.
1. Press and the hold down the DISPLAY button , then press the STANDBY/ON button when the unit is Power on.
Version is displayed on FL display only for 3 seconds.
Ex.
V e r. 1 .0 1 /0 5 3 0 5 a
2. Press the STANDBY/ON button to Power off.

4. Memory Backup

The AV receiver uses a battery-less memory backup system in order to retain radio presets and other settings
when it's unplugged or in the case of a power failure.
Although no batteries are required, the AV receiver must be plugged into an AC outlet in order to charge the
backup system. Once it has been charged, the AV receiver will retain the settings for several weeks,
although this depends on the environment and will be shorter in humid climates.
<PA> : TX-SR603 Australian model
<WT> : TX-SR603 World wide model
<PP> : TX-SR603E European model
<8360> : TX-SR8360 Chinese model
DESCRIPTION PART NO.
10A-UL 252199
5A-SE-EAK 252078
5A-SE-TL250V 252244
5A-SE-TL250V 252278
5A-SE-EAK 252078
5A-SE-TL250V 252244
5A-SE-TL250V 252278
5A-UL/T-237 252164
5A-T/UL-ST2 252258
2.5A-SE-EAK 252075
2.5A-SE-TL250V 252241
2.5A-SE-TL250V 252275
12A-UL/T-314 252196
12A-TUL-250V 252301
12A-UL/T-314 252196
12A-TUL-250V 252301
2.5A-SE-EAK 252075
2.5A-SE-TL250V 252241
2.5A-T/UL-ST2 252254
REMARKS
!, <DD, DC>
!, <WT>
!, <WT>
!, <WT>
!, <PP, PA, WT, GK, GR, GQ>, <8360>
!, <PP, PA, WT, GK, GR, GQ>, <8360>
!, <PP, PA, WT, GK, GR, GQ>
!, <DD, DC>
!, <DD, DC>
!, <PP, PA, WT, GK, GR, GQ>, <8360>
!, <PP, PA, WT, GK, GR, GQ>, <8360>
!, <PP, PA, WT, GK, GR, GQ>, <8360>
!
!
!
!
!
!
!
TX-SR603/603E/8360