12 cm 9.4 GB DVD-RAM
8 cm 2.8 GB DVD-RAM
12 cm 4.7 GB DVD-R
(for General Ver. 2.0)
DVD-Video
CD-Audio (CD-DA)
Video CD
CD-R/RW
(CD-DA,Video CD formatted discs)
Audio
Recording system:Dolby Digital, 2ch
LINEAR PCM
(for XP mode only, selectable)
Audio In:AV1/AV2 (21 pin) AV3/AV4 (pin jack)
Input Level:Standard: 0.5 Vms
Full scale: 2 Vms at 1k Hz
Input Impedance:more than 10k ohm
Audio Out:AV1/AV2 (21 pin) Audio Out (pin jack)
Output Level:Standard: 0.5 Vms
Full scale: 2Vms at 1k Hz
Output Impedance:less than 1k ohm
Digital Audio Out:Optical terminal (PCM, Dolby Digital, DTS, MPEG)
Television System
Tuner System:PAL I 75 ohm
Channel Coverage:
DMR-HS2EB/EB1 only UHF: CH 21-68
DMR-HS2EG/EG1 only VHF: CH E2-E12, A-H2 (For Italy)
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.
2.1.1 LEAKAGE CURRENT COLD CHECK
2.1.2 LEAKAGE CURRENT HOT CHECK (See Figure 1 .)
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2.1.1 LEAKAGE CURRENT COLD
CHECK
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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 metallic cabinet part on the equipment such as screwheads, connectors, control shafts,
etc. When the exposed metallic part has a return path to thechassis, the reading should be
between 1MΩ and 5.2MΩ.
When the exposed metal does not have a return path to the chassis, the reading must be
.
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Figure 1
2.1.2 LEAKAGE CURRENT HOT CHECK
(See Figure 1 .)
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1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this
check.
2. Connect a 1.5kΩ, 10 watts resistor, in parallel with a 0.15•F capacitors, between each exposed
metallic part on the set and a good earth ground such as a water pipe, as shown in
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.
Figure 1 0.
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
mu3st not exceed 1/2 milliamp. In case a measurement is outsideof the limits specified, there is
a possibility of a shock hazard, and the equipment should be repaired and rechecked before it is
returned to the customer.
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3 PREVENTION OF ELECTRO STATIC
DISCHARGE (ESD) TO
ELECTROSTATICALLY SENSITIVE (ES)
DEVICES
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Some semiconductor (solid state) devices can be damaged easily by static electricity. Such
components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES
devices are integrated circuits and some field-effect transistorsand semiconductor "chip" components.
The following techniques should be used to help reduce the incidence of component damage caused
by electro static discharge (ESD).
1. Immediately before handling any semiconductor component or semiconductor-equipped
assembly, drain off any ESD on your body by touching a known earth ground. Alternatively,
obtain and wear a commercially available discharging ESD wrist strap, whichshould be
removed for potential shock reasons prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ES devices, place the assembly on a
conductive surface such as alminum foil, to prevent electrostatic charge buildup or exposure of
the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
4. Use only an anti-static solder removal device. Some solder removal devices not classified as
"anti-static (ESD protected)" can generate electrical charge sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to
damage ES devices.
6. Do not remove a replacement ES device from its protective package until immediately before
you are ready to install it. (Most replacement ES devices are packaged with leads electrically
shorted together by conductive foam, alminum foil or comparableconductive material).
7. Immediately before removing the protective material from the leads of a replacement ES
device, touch the protective material to the chassis or circuit assembly into which the device
will be installed.
Caution
Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise
hamless motion such as the brushing together of your clothes fabric or the lifting of your foot
from a carpeted floor can generate static electricity (ESD) sufficient todamage an ES device).
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4 Precaution of Laser Diode
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5 How to replace the Lithium Battery
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REPLACEMENT PROCEDURE
1. Remove the Top cover and DVD-RAM drive unit with Main P.C.B. by referring the
Disassembling Procedure.
2. Unsolder the Lithium Batteries: B7501 and then replace it into new one.
( As shown in 9.10. The Main P.C.B. )
NOTE:
The lithium battery is a critical component. ( Type No.: CR2354-1GUF Manufactured by Panasonic. )
It must never be subjected to excessive heat or discharge.
It must therefore only be fitted in equipment designed specifically for its use.
Replacement batteries must be of the same type and manufacture.
They must be fitted in the same manner and location as the original battery, with the correct polarity
contacts observed.
Do not attempt to re-charge the old battery or re-use it for any other purpose.
It should be disposed of in waste products destined for burial rather than incineration.
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6 Handling the Lead-free Solder
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6.1 About lead free solder (PbF)
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6.1 About lead free solder (PbF)
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Distinction of PbF P.C.B.:
P.C.B.s (manufactured) using lead free solder will have a PbF stamp on the P.C.B.
Caution:
●Pb free solder has a higher melting point than standard solder; Typically the melting point is 50
- 70°F (30 - 40°C) higher. Please use a high temperature soldering iron. In case of the soldering
iron with temperature control,please set it to 700 ± 20°F (370 ± 10°C).
● Pb free solder will tend to splash when heated too high (about 1100°F/600°C).
● When soldering or unsoldering, please completely remove all of the solder on the pins or
solder area, and be sure to heat the soldering points with the Pb free solder until it melts
enough.
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