Onkyo TX-8222 Service Manual page 3

SERVICE PROCEDURES
1. Replacing the fuses
This symbol located near the fuses indicates that the
fuse used is fast 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 utlise est a rapide.
Pour une protection permanente, n'untiliser que fusibles de
meme type. Ce darnier est la qu le present symbol est
appse.
CIRCUIT NO. PART NO.
F901 252326GR or
252258GR
F902 252075GR or
252275GR
F903 252326GR or
252258GR
252075GR or
252275GR
Note: <D>:North American model only
<P>: European model only
<A>: Australian model only
2. To initialize the unit
The TX-8222 contain a micro processor for signal processing
and control functions. In very rare situations, severe interference,
noise from an external source, or static electricity may cause it to lockup.
In the unlikely event that this happens, unplug the power cord from the
wall outlet, wait at least Þve seconds, and then plug it back in again.
To reset the TX-8222 to its f actor y defaults, turn it on and,
while holding down the VIDEO button, press the
ST ANDBY/ON button. When the reset is complete,
"Clear" appears on the display and the TX-8222 enter
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 set to the customer.
Leakage Current Check
Measure leakage current to a known earth ground(water pipe,
conduit, etc.) by connecting a leakage current tester between
the earth ground and exposed metal parts of the appliance
(input/output terminals, screwheads,metal overlays, etc.).
Plug the power supply cord directly into a 120V AC 60 Hz outlet
and turn Standby switch on. Any current meausred must not
exceed 0.5mA.
4.
Memory backup
The TX-8222 use a batter y-less memory backup sys-
tem (C704) in order to retain r adio presets and other settings
when it's unplugged or in the case of a po wer failure.
Although no batteries are required, it must be plugged
into an AC outlet in order to charge the backup system.
Once it has been charged, the TX-8222 will retain the
settings for several weeks, although this depends on
the environment and will be shorter in humid climates.
DESCRIPTION
5A-UL/T-233 or
5A-T/UL-ST2 <D>
2.5A-SE-EAK or
2.5A-SE-TL250V <P/A>
5A-UL/T-233 or
5A-T/UL-ST2 <D>
2.5A-SE-EAK or
2.5A-SE-TL250V <P/A>
TX-8222