RS.TR979 ]
.CONTENTS
Page
SAFETY PRECAUTION 2
ACCESSORIES 3
CONNECTION S 3
LOCATION OF CONTROLS 4, 5
ABOUT THE ATC FUNCTION 6
DISASSEMBLY INSTRUCTIONS 7-11
ADJUSTMENT PROCEDURE 12, 13
MEASUREMENTS AND ADJUSTMENTS 14-16
TROUBLESHOOTING GUIDE 17-20
TERMI NAL FUNCTION OF IC 21-25
BLOCK DIAGRAM 26, 27
SCHEMATIC DIAGRAM 28-40
Page
WIRING CONNECTION DIAGRAM 41
INTERNAL CONNECTION OF FL 42
PRINTED CIRCUIT BOARDS 43-48
TERMINAL GUIDE OF IC'S, TRANSISTORS
AND DIODES 49
PACKAGING 49
EXPLODED VIEWS (Cabinet parts) 50, 51
REPLACEMENT PARTS LIST 52, 53
EXPLODED VIEW (Loading cassette '
mechanism parts: DECK 1 and DECK 2) 54-57
REPLACEMENT PARTS LIST 58-61
RESISTORS AND CAPACITORS 62-64
.SAFETY PRECAUTION (This "safety precaution" is applied only in U.S.A.)
1. Before servicing, unplug the power cord to prevent an electric shock.
2. When replacing parts, use only manufacturer's recommended components for safety.
3. Check the condition of the power cord. Replace if wear or damage is evident.
4. After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc.
5. Before returning the serviced equipment to the customer, be sure to make the following insulation resistance
test to prevent the customer from being exposed to a shock hazard.
. INSULATION RESISTANCE TEST
1. Unplug the power cord and short the two prongs of the plug with a jumper wire.
2. Turn on the power switch.
3. Measure the resistance value with ohmmeter between the jumpered AC plug and each exposed metal cabinet
part, such as screwheads antenna, control shafts, handle brackets, etc. Equipment with antenna terminals
should read between 3MO and 5.2MO to all exposed parts (Fig. A). Equipment without antenna terminals
should read approximately infinity to all exposed parts (Fig. B).
Note: Some exposed parts may be isolated from the chassis by design. These will read infinity.
Antenna
terminal
Exposed
metal
part
.-J..
Ohmmeter
(Fig, A)
Resistance=3 MO-5,2 MO
Exposed
metal
part
Ohmmeter
(Fig. B)
Resistance=Approx. 00
4. If the measurement is outside the specified limits, there is a possibility of a shock hazard. The equipment
should be repaired and rechecked before itisreturnedtothe customer.
-2-
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