Service Procedure - Onkyo TX-SR504 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.
REF NO. PART NAME
F901 FUSE
F901 or FUSE
F901 FUSE
F901 or FUSE
F901 FUSE
F901 or FUSE
F901 FUSE
F901 or FUSE
F902 FUSE
F902 or FUSE
F903 FUSE
F903 or FUSE
F903 FUSE
F903 or FUSE
F903 FUSE
F903 or FUSE
F6901 FUSE
F6901 or FUSE
F6902 FUSE
F6902 or FUSE
<Notes>
<DD> : TX-SR504 USA model
<DC> : TX-SR504 Canadian model
<PP> : TX-SR504E European model
<WT> : TX-SR504 World wide model
2. To initialize the unit
1. Press and hold down VIDEO 1/VCR button, then press STANDBY/ON button when the unit is powered on.
2. After " C l e a 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
<Note>
Main microprocessor Q701 only.
1. Press and hold down DISPLAY button, then press STANDBY/ON button when the unit is powered on.
The version will be displayed on FL display only for 3 seconds.
Ex.
Ve r. 1 . 0 1 / 0 5 3 0 5 a
2. Press 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.
DESCRIPTION PART NO.
8A-UL/T-233 252329GR
8A-T/UL-ST2 252261GR
4A-SE-EAK 252077GR
4A-SE-TL250V 252277GR
4A-SE-EAK 252077GR
4A-SE-TL250V 252277GR
4A-SE-EAK 252077GR
4A-SE-TL250V 252277GR
4A-SE-EAK 252077GR
4A-SE-TL250V 252277GR
5A-UL/T-233 252326GR
5A-T/UL-ST2 252258GR
2.5A-SE-EAK 252075GR
2.5A-SE-TL250V 252275GR
2.5A-SE-EAK 252075GR
2.5A-SE-TL250V 252275GR
10A-UL/T-233 252330GR
10A-T/UL-ST2 252333GR
10A-UL/T-233 252330GR
10A-T/UL-ST2 252333GR
<GR> : TX-SR504 Chinese model only
<GQ> : TX-SR504 Hong kong model only
<GK> : TX-SR504 Korean model only
<8450> : TX-SR8450 Chinese model only
REMARKS
!, <DD, DC>
!, <DD, DC>
!, <WT>
!, <WT>
!, <GR, GQ, GK>, <8450>
!, <GR, GQ, GK>, <8450>
!, <PP>
!, <PP>
!, <WT>
!, <WT>
!, <DD, DC>
!, <DD, DC>
!, <WT, PP>
!, <WT, PP>
!, <GR, GQ, GK>, <8450>
!, <GR, GQ, GK>, <8450>
!
!
!
!
TX-SR504/504E/8450