5
1 Safety Precautions
1.1.
General guidelines
1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or
damaged by the short circuit.
2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly
installed.
3. After servicing, make the following leakage current checks to prevent the customer from being exposed to shock hazards.
1.1.1.
Leakage current cold check
1. Unplug the AC cord and connect a jumper between the
two prongs on the plug.
2. Measure the resistance value, with an ohmmeter,
between the jumpered AC plug and each exposed metal-
lic cabinet part on the equipment such as screwheads,
connectors, control shafts, etc. When the exposed metal-
lic part has a return path to the chassis, the reading
should be between 1M
Ω
and 5.2M
Ω
.
When the exposed metal does not have a return path to
the chassis, the reading must be .
1.1.2.
Leakage current hot check
(See Figure 1.)
1. Plug the AC cord directly into the AC outlet. Do not use
an isolation transformer for this check.
2. Connect a 1.5k
Ω
, 10 watts resistor, in parallel with a
0.15
μ
F capacitors, between each exposed metallic part
on the set and a good earth ground such as a water pipe,
as shown in Figure 1.
3. Use an AC voltmeter, with 1000 ohms/volt or more
sensitivity, to measure the potential across the resistor.
4. Check each exposed metallic part, and measure the
voltage at each point.
5. Reverse the AC plug in the AC outlet and repeat each of
the above measurements.
6. The potential at any point should not exceed 0.75 volts
RMS. A leakage current tester (Simpson Model 229 or
equivalent) may be used to make the hot checks, leakage
current must not exceed 1/2 milliampere. In case a mea-
surement is outside of the limits specified, there is a pos-
sibility of a shock hazard, and the equipment should be
repaired and rechecked before it is returned to the cus-
tomer.
1.2.
Caution for fuse replacement
Summary of Contents for DMP-BD79GA
Page 2: ...2 ...
Page 3: ...3 ...
Page 7: ...7 1 3 Caution for AC cord Only for BD79GC ...
Page 9: ...9 2 2 Precaution of Laser Diode ...
Page 16: ...16 5 Location of Controls and Components ...
Page 17: ...17 ...
Page 38: ...38 9 2 5 Grease ...
Page 42: ...42 9 3 3 How to Clean the Lens of Optical Pick UP ...
Page 43: ...43 9 4 Adjustment of BD Drive 9 4 1 Repair Flowchart ...
Page 46: ...46 10 1 2 Checking and Repairing of BD Drive and Digital P C B ...
Page 55: ...Model No DMP BD79GA BD79GC BD79GN BD79GT BD79GW BD79PU BD79PH SCHEMATIC DIAGRAM NOTICE ...
Page 56: ...Model No DMP BD79GA BD79GC BD79GN BD79GT BD79GW BD79PU BD79PH PART LIST NOTICE ...
Page 57: ...Model No DMP BD79GA BD79GC BD79GN BD79GT BD79GW BD79PU BD79PH ABBREVIATION ...
Page 58: ...Model No DMP BD79GA BD79GC BD79GN BD79GT BD79GW BD79PU BD79PH POWER SECTION POWER P C B ...
Page 59: ...Model No DMP BD79GA BD79GC BD79GN BD79GT BD79GW BD79PU BD79PH LED SECTION POWER P C B ...
Page 60: ...Model No DMP BD79GA BD79GC BD79GN BD79GT BD79GW BD79PU BD79PH AUDIO DAC SECTION DIGITAL P C B ...
Page 61: ...Model No DMP BD79GA BD79GC BD79GN BD79GT BD79GW BD79PU BD79PH AV SECTION DIGITAL P C B ...
Page 63: ...Model No DMP BD79GA BD79GC BD79GN BD79GT BD79GW BD79PU BD79PH DDR SECTION DIGITAL P C B ...
Page 64: ...Model No DMP BD79GA BD79GC BD79GN BD79GT BD79GW BD79PU BD79PH MTK SECTION DIGITAL P C B ...
Page 65: ...Model No DMP BD79GA BD79GC BD79GN BD79GT BD79GW BD79PU BD79PH FE SA SECTION DIGITAL P C B ...
Page 66: ...Model No DMP BD79GA BD79GC BD79GN BD79GT BD79GW BD79PU BD79PH POWER P C B COMPONENT SIDE ...
Page 67: ...Model No DMP BD79GA BD79GC BD79GN BD79GT BD79GW BD79PU BD79PH POWER P C B FOIL SIDE ...
Page 68: ...Model No DMP BD79GA BD79GC BD79GN BD79GT BD79GW BD79PU BD79PH DIGITAL P C B COMPONENT SIDE ...
Page 69: ...Model No DMP BD79GA BD79GC BD79GN BD79GT BD79GW BD79PU BD79PH DIGITAL P C B FOIL SIDE ...
Page 77: ...Model No DMP BD79GA BD79GC BD79GN BD79GT BD79GW BD79PU BD79PH Exploded View ...
Page 78: ...Model No DMP BD79GA BD79GC BD79GN BD79GT BD79GW BD79PU BD79PH Mechanism View ...
Page 79: ...Model No DMP BD79GA BD79GC BD79GN BD79GT BD79GW BD79PU BD79PH Packing View ...