Service Manuals, User Guides, Schematic Diagrams or docs for : Sony Sony DVP-S7700

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Sony DVP-S7700

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  SERVICE MANUAL                         US Model
                                    Canadian Model


                                    CD/DVD PLAYER

                                                    SAFETY CHECK-OUT
                                 After correcting the original service problem, perform the following
                                 safety checks before releasing the set to the customer:

1. Check the area of your repair for unsoldered or poorly-sol-            LEAKAGE TEST
   dered connections. Check the entire board surface for solder               The AC leakage from any exposed metal part to earth ground
   splashes and bridges.                                                  and from all exposed metal parts to any exposed metal part having
2. Check the interboard wiring to ensure that no wires are                a return to chassis, must not exceed 0.5 mA (500 microamperes).
   "pinched" or contact high-wattage resistors.                           Leakage current can be measured by any one of three methods.
3. Look for unauthorized replacement parts, particularly transis-         1. A commercial leakage tester, such as the Simpson 229 or RCA
   tors, that were installed during a previous repair. Point them            WT-540A. Follow the manufacturers' instructions to use these
   out to the customer and recommend their replacement.                      instruments.
4. Look for parts which, though functioning, show obvious signs           2. A battery-operated AC milliammeter. The Data Precision 245
   of deterioration. Point them out to the customer and recom-               digital multimeter is suitable for this job.
   mend their replacement.                                                3. Measuring the voltage drop across a resistor by means of a
5. Check the B+ voltage to see it is at the values specified.                VOM or battery-operated AC voltmeter. The "limit" indica-
                                                                             tion is 0.75V, so analog meters must have an accurate low-
6. Check the B+ voltage to see it is at the values specified.                voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
7. Check the antenna terminals, metal trim, "metallized" knobs,              amples of a passive VOM that is suitable. Nearly all battery
   screws, and all other exposed metal parts for AC leakage.                 operated digital multimeters that have a 2V AC range are suit-
   Check leakage as described below.                                         able. (See Fig. A)

                    To Exposed Metal
                    Parts on Set

                                                                          WHEN SERVICING, DO NOT APPROACH THE LASER
                                                    AC                    EXIT WITH THE EYE TOO CLOSELY. IN CASE IT IS

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