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FILE NO. 810-200329

SERVICE MANUAL

D IG IT A L V ID E O

DIGITAL MEDIA SERVER
SD-H400

DOCUMENT CREATED IN JAPAN, Sep., 2003
PREPARATION OF SERVICING
Pickup Head consists of a laser diode that is very susceptible to external static electricity.
Although it operates properly after replacement, if it was subject to electrostatic discharge during replacement,
its life might be shortened. When replacing, use a conductive mat, soldering iron with ground wire, etc. to
protect the laser diode from damage by static electricity.
And also, the LSI and IC are same as above.

Ground conductive

wrist strap for body.

Soldering iron

with ground wire

or ceramic type

1M 9
Conductive mat
The ground resistance

between the ground line

and the ground is less than 10 9 .
SAFETY NOTICE
SAFETY PRECAUTIONS
LEAKAGE CURRENT CHECK
Plug the AC line cord directly into a 120V AC outlet (do Measure the AC voltage across the 1500 W resistor.
not use an isolation transformer for this check). Use an The test must be conducted with the AC switch on and
AC voltmeter, having 5000 W per volt or more sensitivity. then repeated with the AC switch off. The AC voltage
Connect a 1500 W 10 W resistor, paralleled by a 0.15 mF indicated by the meter may not exceed 0.3 V. A reading
150V AC capacitor between a known good earth ground exceeding 0.3 V indicates that a dangerous potential
(water pipe, conduit, etc.) and all exposed metal parts of exists, the fault must be located and corrected.
cabinet (antennas, handle bracket, metal cabinet Repeat the above test with the DVD VIDEO PLAYER
screwheads, metal overlays, control shafts, etc.). power plug reversed.
NEVER RETURN A DVD VIDEO PLAYER TO THE
CUSTOMER WITHOUT TAKING NECESSARY
CORRECTIVE ACTION.

READING SHOULD NOT EXCEED 0.3V

AC VOLTMETER
DVD VIDEO PLAYER (5000 9 per volt
or more sensitivity)

Good earth ground
such as a water pipe,
1500 9 conduit, etc.
10 W

0.15 mF 150V AC
AC OUTLET
Test all exposed metal.
Voltmeter Hook-up for Leakage Current Check

The lightning flash with arrowhead symbol, within an
equilateral triangle, is intended to alert the user to the
presence of uninsulated "dangerous voltage" within the
product's enclosure that may be of sufficient magnitude to
constitute a risk of electric shock to persons.

The exclamation point within an equilateral triangle is
intended to alert the user to the presence of important
operating and maintenance (servicing) instructions in the
literature accompanying the appliance.
CONTENTS
SECTION 1
GENERAL DESCRIPTIONS
1. OPERATING INSTRUCTIONS 2. LOCATION OF MAIN PARTS AND
MECHANISM PARTS
2-1. Location of Main Parts
2-2. Location of PC Boards

SECTION 2
PART REPLACEMENT AND ADJUSTMENT PROCEDURES
1. Replacement of Mechanical Parts 1-2. PC Board Replacement
1-1. Cabinet Replacement 1-2-1. DVD Main PC Board
1-1-1. Top Cover 1-2-2. Tivo PC Board
1-1-2. HDD 1-2-3. Power PC board
1-1-3. Front Panel 1-2-4. KDB Front and Power Switch PC Board
1-1-4. Tray Door
1-1-5. Mechanism Chassis Assembly
1-1-6. Fan
1-1-7. Rear Panel

SECTION 3
SERVICING DIAGRAMS
1. CIRCUIT SYMBOLS AND 3-5. Output Block Diagram (DVD)
SUPPLEMENTARY EXPLANATION 3-6. Tivo Block Diagrams
1-1. Precautions for Part Replacement 3-6-1. Tivo Block Diagram1
1-2. Solid Resistor Indication 3-6-1. Tivo Block Diagram2
1-3. Capacitance Indication 4. CIRCUIT DIAGRAMS
1-4. Inductor Indication 4-1. Power Supply Circuit Diagram
1-5. Waveform and Voltage Measurement 4-2. KDB Front Circuit Diagram
1-6. Others 4-3. Power Switch Circuit Diagram
2. PRINTED WIRING BOARD AND 4-4. DVD Main Circuit Diagram
SCHEMATIC DIAGRAM 4-5. Tivo Circuit Diagrams
3. BLOCK DIAGRAMS 5. PC BOARDS
3-1. DVD Overall Block Diagram 5-1. Power Switch PC Board
3-2. Power Supply Block Diagram 5-2. KDB Front PC Board
3-3. KDB Front, Power Switch Block Diagram 5-3. DVD Main PC Board
3-4. Logical System Block Diagram (DVD)

SECTION 4
PARTS LIST
SAFETY PRECAUTION 1. EXPLODED VIEWS
NOTICE 1-1. Packing Assembly
ABBREVIATIONS 1-2. Chassis Assembly
(1) Integrated Circuit (IC) 2. PARTS LIST
(2) Capacitor (Cap)
(3) Resistor (Res)
GENERAL DESCRIPTIONS
SECTION 1

SECTION 1
GENERAL DESCRIPTIONS
1. OPERATING INSTRUCTIONS
Please refer to the owner's manual about the contents.
2. LOCATION OF MAIN PARTS AND MECHANISM PARTS
2-1. Location of Main Parts

HDD UNIT

MD01
Mechanism chassis B903 FAN
assembly
Fig. 1-2-1

2-2. Location of PC Boards

UT01 Tivo Main board

U801 Power PC board

UD01 DVD Main PC board
UX03 Power Switch
PC board UX02 KDB Front PC board

Fig. 1-2-2
SECTION 2
PART REPLACEMENT AND
ADJUSTMENT PROCEDURES
CAUTIONS BEFORE STARTING SERVICING
Electronic parts are susceptible to static electricity and may easily damaged, so do not forget to ground as required.
Many screws are used inside the unit. To prevent the screws from missing, dropping, etc.always use a magnetized
screwdriver in servicing. Several kinds of screws are used and some of them need special cautions. That is, take care of
the tapping screws securing molded parts and fine pitch screws used to secure metal parts. If they are used improperly,
the screw holes will be easily damaged and the parts can not be fixed.

ADJUSTMENT PROCEDURES
PART REPLACEMENT AND
1. REPLACEMENT OF MECHANICAL PARTS
1-1. Cabinet Replacement

SECTION 2
1-1-1. Top Cover 1-1-2. HDD
1. Remove seven screws (1), then remove the top cover 1. Disconnect a connector (1).
(2). 2. Remove four screws (2) and a connector (3), then
remove the HDD (4).
Screws (1)

Screws (1)

Screws (2)
Connector (1)

Connector (3)

HDD (4)

Top cover (2)
Screws (1)

Fig. 2-1-1
Fig. 2-1-2
1-1-3. Front Panel 1-1-5. Mechanism Chassis Assembly
1. Remove the top cover. (Refer to item 1-1-1.) Note:
2. Remove the HDD. (Refer to item 1-1-2.)

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