DTR-8.3 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.
F6901,F6902 F901 F902
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.
PART NO.
252100 252196 252196 252078, 252244 or 252278 252075, 252241 or 252275 252160 or 252254 252075, 252241 or 252275
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>
F903
F9501,F9502
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.
