Onkyo TX-8255 Service Manual page 32

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
F902 FUSE
F902 or FUSE
F903 FUSE
F903 or FUSE
F903 FUSE
F903 or FUSE
<Notes>
<MDC> : Canadian model
<MPP> : European model
2. 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.
3. Memory Backup
The 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 receiver must be plugged into an AC outlet in order to charge the backup
system. Once it has been charged, the receiver will retain the settings for several weeks, although this depends on the environment and
will be shorter in humid climates.
4. To initialize the unit
1. Press and hold down LINE 2 LINE 2 button, then press ON/STANDBY
2. After " C le a r C lear " is displayed, the preset memory and each mode stored in the memory, are initialized and
will return to the factory settings.
5. To check version of Main microprocessor
1. Press and hold down DISPLAY DISPLAY button, then press ON/STANDBY
The main microprocessor version will be displayed on Front Display for about 3 seconds.
<Ex.>
V e r .1 .0 2 /0 6 Y 2 8 A
2. Press ON/STANDBY button to power off.
6. Setting position before shipment
(1) MASTER VOLUME
(2) BASS
(3) TREBLE
(4) BALANCE
DESCRIPTION PART NO.
5A-UL/T-233 252326GR
5A-T/UL-ST2 252258GR
2.5A-SE-EAK FUSE 252075GR
2.5A-SE-TL250V 252275GR
5A-UL/T-233 252326GR
5A-T/UL-ST2 252258GR
2.5A-SE-EAK FUSE 252075GR
2.5A-SE-TL250V 252275GR
ON/STANDBY button when the unit is powered on.
ON/STANDBY button when the unit is power on.
Version of Main microprocessor FW (Q601)
: MIN.
: CENTER
: CENTER
: CENTER
REMARKS
!, <MDC>
!, <MDC>
!, <MPP>
!, <MPP>
!, <MDC>
!, <MDC>
!, <MPP>
!, <MPP>
TX-8255