Hitachi DVP 315 UPX Service Manual

Page 1

TK H TNo.9109E

HITACHI I

SERVICE MANUAL

DV-P315U(PX)

CONTENTS

1. Precautions
2. Product Specifications
3. Operating Instructions
4. Disassembly and Heassembly
5. Troubleshooting
6. Exploded Views
7. Replacement Parts List
8. Block Diagrams
9. PCB Diagrams

10. Wiring Diagram

11. Schematic Diagrams

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SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

DVD PLAYER

May 2001 Digital Media Products Division, Tokai

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Precautions

1. Precautions

1-1 Safety Precautions

1) Before returning an instrument to the customer,
always make a safety check of the entire
instrument, including, but not limited to, the
following items:

(1) Be sure that no built-in protective devices are

defective or have been defeated during servicing.
(1)Protective shields are provided to protect both
the technician and the customer, Correctly replace
all missing protective shields, including any
remove for servicing convenience.
(2)When reinstalling the chassis and/or other as-
sembly in the cabinet, be sure to put back in place
all protective devices, including, but not limited to,
nonmetaliic control knobs, insulating fish papers,
adjustment and compartment covers/shields, and
isolation resistor/capacitor networks. Do not
operate this instrument or permit it to be operated
without all protective devices correctly installed
and functioning.

(2) Be sure that there are no cabinet openings
through which adults or children might be able to
insert their fingers and contact a hazardous
voltage. Such openings include, but are not limited
to, excessively wide cabinet ventilation slots, and
an improperly titted and/or incorrectly secured
cabinet back cover.

(3) Leakage Current Hot Check-With the instrument
completely reassembled, plug the AC line cord
directly into a 110-240V AC outlet. (Do not use a
isolation transformer during this test.) Use a
leakage current tester or a metering system that
complies with American National Standards
institute (ANSl) 0101.1 Leakage Current for
Appliances and Underwriters Laboratories (UL)
1270 (40.7). With the instruments AC switch first in
the ON position and then in the OFF position,
measure from a known earth ground (metal water
pipe, conduit, etc.) to all exposed metal parts of
the instrument (antennas, handle brackets, metal
cabinets, screwheads, metallic overlays, control
shafts, etc), especially any exposed metal parts
that offer an electrical return path to the chassis.
Any current measured must not exceed 0.5mA.
Fieverse the instrument power cord plug in the
outlet and repeat the test. See Fig. 1-1.

Any measurements not within the limits specified
herein indicate a potential shock hazard that must
be eliminated before returning the instrument to
the customer.

. ----- (retreats
1% 0.5mAl
DEVlCE ciiiiREfii
UNDER iEerR
TEST
TEST ALL
EXPOSED METER
SURFACES
z-WIRE CDRD
ALSO TEST WITH EARTH
PLUG REVERSED
(USING AC ADAPTER 7 GROUND
PLUG AS REQUIRED)

Fig. M AC Leakage Test

(4) insulation Resistance Test Cold Check-(f) Unplug
the power supply cord and connect a jumper wire
between the two prongs of the plug. (2) Turn on the
power switch of the instrument. (3) Measure the
resistance with an ohmmeter between the
jumpered AC plug and all exposed metallic cabinet
parts on the instrument, such as screwheads,
antenna, control shafts, handle brackets, etc.
When an exposed metallic part has a return path
to the chassis, the reading should be between 1
and 5.2 megohm. When there is no return path to
the chassis, the reading must be infinite. if the
reading is not within the limits specified, there is
the possibility of a shock hazard, and the
instrument must be re-pared and rechecked before
it is returned to the customer. See Fig. 1-2.

Antenna H
Terminal

Exposed /
Melal Part

ohmmeter

Fig. 1-2 Insulation Resistance Test

1-1