Service Procedure; Replacing The Fuses; To Initialize The Unit; To Check The Version Of Microprocessor - Onkyo TX-SR604 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>
<DD> : TX-SR604 USA model
<PA> : TX-SR604 Australian model
<WT> : TX-SR604 World wide model
<WO> : TX-SR604 Saudi model
REF NO. PART NAME
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
F910 FUSE
F910 or FUSE
F6901 FUSE
F6902 FUSE

2. To initialize the unit

1. Press and hold down the VIDEO 1/VCR 1 button, then press the STANDBY/ON button when the unit is Power on.
2. After " C lea 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 the version of microprocessor

Main microprocessor Q701 only.
1. Press and hold down the DISPLAY button , then press the STANDBY/ON button when the unit is Power on.
The version is displayed on FL display for 3 seconds.
Ex.
Mai n 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.
<DC> : TX-SR604 Canadian model
<PP> : TX-SR604E European model
<GK> : TX-SR604 Korean model
<GQ> : TX-SR604 Hong kong model
<GR> : TX-SR604 & TX-SR8460 Chinese model
DESCRIPTION PART NO.
10A-UL/T-233 252330GR
10A-T/UL-ST2 252333GR
5A-SE-EAK 252078GR
5A-SE-TL250V 252278GR
5A-SE-EAK 252078GR
5A-SE-TL250V 252278GR
5A-UL/T-233 252326GR
5A-T/UL-ST2 252258GR
2.5A-SE-EAK 252075GR
2.5A-SE-TL250V 252275GR
5A-UL/T-233 252326GR
5A-T/UL-ST2 252258GR
12A-TUL-250V 252301GR
12A-TUL-250V 252301GR
REMARKS
!, <DD,DC>
!, <DD,DC>
!, <WO,WT,GQ,GR,GK,PA,PP>
!, <WO,WT,GQ,GR,GK,PA,PP>
!, <WO,WT>
!, <WO,WT>
!, <DD,DC>
!, <DD,DC>
!, <WO,WT,GQ,GR,GK,PA,PP>
!, <WO,WT,GQ,GR,GK,PA,PP> Q
!
!
!
!
TX-SR604/604E/8460