Service Procedures - Integra DTR-8.3 Service Manual

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.
F6901,F6902 252100
252196
F901 252196
F902 252078,
252244 or
252278
F903 252075,
252241 or
252275
F9501,F9502 252160 or
252254
252075,
252241 or
252275
Note:
<D>: 120V model only
<A>: Australian model model
2. To initialize the unit
This device employs a microprocessor to perform various
functions and operations. If interference generated by an
external power supply, radio wave, or other electrical source
results in accident which causes the specified operations
and functions to operate abnormally.
To perform a result, please follow the procedure below.
1.Press the STANDBY ON button to turn on the unit.
2.Press and hold down the VIDEO 1 button, then press the
STANDBY/ON button.
3.After "CLEAR" is displayed, the preset memory and each
mode stored in the memory, such as surround, are
initialized and will return to the factory setting.
4.Unplug the power supply cord.
DESCRIPTION
10A-EAK, Fuse <A>
12A-UL/T-314, Fuse <D>
12A-UL/T-314, Fuse <D>
5A-SE-EAK,
5A-SE-TL250V or
5A-SE-TL250V, Fuse <A>
2.5A-SE-EAK,
2.5A-SE-TL250V or
2.5A-SE-TL250V, Fuse <A>
2.5A-UL/T-237 or
2.5A-T/UL-ST2, Fuse <D>
2.5A-SE-EAK,
2.5A-SE-TL250V or
2.5A-SE-TL250V, Fuse <A>
3. Safety-check out
(Only U.S.A. model)
After correcting the original service problem, perform the
following safety check before releasing the set to the
customer. Connect the insulating-resistance tester between
the plug of power supply cord and screw on the back panel.
Specifications: 3.3Mohm+/-10% at 500V.
4. Memory Preservation
This unit does not require memory preservation batteries. A
built-in memory power back-up system preserves the contents
of the memory during power failures and even when the unit is
unplugged. The unit must be plugged in order to charge the
back-up system.
The memory preservation period after the unit has been
unplugged varies depending on climate and placement of the
unit. On the average, memory contents are protected over a
period of a few weeks after the last time the unit has been
unplugged. This period is shorter when the unit is e xposed to a
highly humid climate.
5. To confirm the version of microprocessor
1.Press the STANDBY ON button to turn on the unit.
2.Press and hold down the DISPLAY button after more than
15 sec., then press the STANDBY/ON button.
3.After the versions of main,sub and net microprocessors are
displayed on FL tube, the unit returns to the original position.
DTR-8.3