Onkyo TX-7920 - Service Procedures; Fuse Replacement and Safety Checks

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Remote control transmitter RC-223S (Only Model TX-7920)
Transmitter: Infrared
Signal range: Approx. 5 meters (16ft. X 4” )
Power supply: Two “AA” batteries(1.5V X 2)
Specifications and features are subject to change without notice.
SERVICE PROCEDURES
1.Replacing the fuses 4.Memroy preservation
For continued protection against fire hazard,replace This unit does not require memory preservation batteries.
only with same type and same rating fuse. A built-in memory power back-up system preserves contents
Circuit No. Part No. Description Model of the memory during power failures and even when the
: 7 unit is unplugged. The unit must be plugged in and the
Foz pa ese Eee SCE power switch turned on and off once im order to charge the
F902 252075 2.5A-SE-EAK, Primary TX-7920 back-up system. Note that since this is not a permanent
F951 252074 2A-SE-EAK,AC outlet TX-7920 memory,the power switch must be turned on and off a few
times each month to keep the back-up system operative.
2.Safety-check out The period of time during which memory contents are
After correcting the original service problem,perform preserved after power has last been turned off varies
the following safety check before releasing the set to depending on climate and placement of the unit.
the customer. On the average, memory contents are protected over a
Connect the insulating-resistance tester between the period of 3 to 4 weeks (a minimum of 2 weeks) after
plug of power suuply cord and nickel screw on the back the last time power has been turned off. This period is
panel. shorter when the unit is exposed to very high humidity or
Specifications: More than 10M 0 used in an area with an extremely humid climate.
3.Changing the band step
A BAND STEP selector switch is not provided.
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