Toshiba D-R350SB User manual

DVD VIDEO RECORDER
SERVICE MANUAL
May, 2005
S
FILE NO. 810-200548
D-R350SB
DIGITAL VIDEO

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 SI and IC are same as above.
1M W
Ground conductive
wrist strap for body.
Soldering iron
with ground wire
or ceramic type
Conductive mat The ground resistance
between the ground line
and the ground is less than 10 W .
LASER BEAM CAUTION LABEL
When the power supply is being turned on, you may not remove this laser cautions label. If it removes, radiation of a laser
may be received.
·Manufactured under license from Dolby Laboratories. “Dolby” and the double D symbol are trademarks of Dolby
Laboratories.
·“DTS” and “DTS Digital Out” are trademarks of Digital Theater Systems, Inc.
·Manufactured under license from QSound Labs, Inc. U.S. patent Nos. 5,105,462, 5,208,860 and 5,440,638 and various
foreign counterpart. Copyright QSound Labs, Inc. 1998 2002. QXpanderTM is a trademark of QSound Labs, Inc. All
rights reserved.
·VIDEO Plus+ and PlusCode are registered trademarks of Gemstar Development Corporation. The VIDEO Plus+ system
is manufactured under license from Gemstar Development Corporation.

SECTION 2
PART REPLACEMENT AND ADJUSTMENT PROCEDURES
SECTION 3
SERVICING DIAGRAMS
1. CIRCUIT SYMBOLS AND
SUPPLEMENTARY EXPLANATION
1-1. Precau ions for Par Replacemen
1-2. Solid Resis or Indica ion
1-3. Capaci ance Indica ion
1-4. Induc or Indica ion
1-5. Waveform and Vol age Measuremen
1-6. O hers
2. PRINTED WIRING BOARD AND
SCHEMATIC DIAGRAM
3. BLOCK DIAGRAMS
3-1. Overall Block Diagram
4. CIRCUIT DIAGRAMS
4-1. Power Supply Circui Diagram
4-2. Fron Circui Diagram
4-2-1. Fron Jack Circui Diagram
4-2-2. Fron (L) Circui Diagram
4-2-3. Fron (R) Circui Diagram
4-2-4. Fron LED Circui Diagram
4-3. Digi al Circui Diagram
4-4. Mo her Circui Diagram
4-4-1. Tuner In erface Circui Diagram [SH.1]
4-4-2. Audio Circui Diagram [SH.2]
4-4-3. Timer Circui Diagram [SH.3]
4-4-4. Video Circui Diagram [SH.4]
4-4-5. MSP Circui Diagram [SH.5]
5. PC BOARDS
5-1. Power Supply PC Board
5-2. Fron Jack PC Board
5-3. Fron (L) PC Board
5-4. Fron (R) PC Board
5-5. Fron LED PC Board
5-6. Digi al PC Board
5-7. Mo her PC Board
CONTENTS
SECTION 1
GENERAL DESCRIPTIONS
1. OPERATING INSTRUCTIONS
1. REPLACEMENT OF MECHANICAL PARTS
1-1. Cabine Replacemen
1-1-1. Top Cover
1-1-2. Fron Panel
1-1-3. RAM Drive
1-1-4. Rear Panel
1-1-5. Fan
1-2. PC Board Replacemen
1-2-1. Digi al PC Board
1-2-2. Mo her PC Board
1-2-3. Power PC Board
1-2-4. Fron (R), Fron (L), Fron (LED),
Fron Jack PC Boards
2. WIRING CONNECTION DIAGRAM
2. LOCATION OF MAIN PARTS
2-1. Loca ion of Main Par s
2-2. Loca ion of PC Boards
SECTION 4
PARTS LIST
SAFETY PRECAUTION
NOTICE
ABBREVIATIONS
1. EXPLODED VIEWS
1-1. Packing Assembly
1-2. Chassis Assembly
2. PARTS LIST

SECTION 1
GENERAL DESCRIPTIONS
1. OPERATING INSTRUCTIONS
Please refer to the owner's manual about the contents.
SECTION 1
GENERAL DESCRIPTIONS

2. LOCATION OF MAIN PARTS
2-1. Location of Main Parts
Fig. 1-2-1
2-2. Location of PC Boards
Fig. 1-2-2
ZG45 FAN
RAM1 RAM DRIVE
EU02 Power PC board
EU05 Mother PC board
EU01 Digital PC board
EU03A Front (R) PC board
EU55 Front Jack PC board
EU03B Front (L)
PC board
EU56 Front (LED)
PC board

1-1. Cabinet Replacement
1-1-1. Top Cover
1. Remove seven screws (1), then remove the top cover (2).
Fig. 2-1-1
SECTION 2
PART REPLACEMENT AND
ADJUSTMENT PROCEDURES
Screws (1)
Screws (1)
Screws (1)
Top cover (2)
SECTION 2
PART REPLACEMENT AND
ADJUSTMENT PROCEDURES
CAUTIONS BEFORE STARTING PART REPLACEMENT
Electronic parts are susceptible to static electricity and may easily damaged, so do not forget to ground as required.
any screws are used inside the unit. To prevent the screws from missing or 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.
1. REPLACEMENT OF MECHANICAL PARTS

1-1-2. Front Panel
1. Remove the top cover. (Refer to item 1-1-1.)
2. Remove the Digital PC board. (Refer to item 1-2-1.)
3. Disconnect three connectors (1).
4. Remove t o scre s (2) and four cla s, then remove the front panel (3).
Fig. 2-1-2
1-1-3. RAM Drive
1. Remove the front panel. (Refer to item 1-1-2.)
2. Peel off the tape (1).
3. Disconnect the flexible cable (2) and connector (3).
4. Remove three scre s (4) and three scre s (5), then remove the RAM drive (6).
5. Remove the shield cover (7).
Note:
• After replacing, attach the tape (1) to its original position.
Fig. 2-1-3
Connector (1)
Connector (1)
Connector (1)
Screws (2)
Front panel (3)
Claw
Claw
Claws
Flexible
cable (2)
Connector (3)
Tape (1)
Screws (4)
Screws (5)
RAM drive (6)
Shield cover (7)

1-1-4. Rear Panel
1. Remove the top cover. (Refer to item 1-1-1.)
2. Peel of the tape (1).
3. Remove two screws (2) and seven screws (3).
4. Remove two claws, then remove the rear panel (4).
5. Remove two screws (5), then remove the fan (6).
Note:
After replacing, attach the tape (1) to its original position.
Fig. 2-1-4
1-1-5. Fan
1. Remove the top cover. (Refer to item 1-1-1.)
2. Peel off the tape (1).
3. Disconnect the connector (2).
4. Remove two screws (3), then remove the fan (4).
Note:
After replacing, attach the tape (1) to its original position.
Screws (2)
Screws (3)
Screws (5)
Fan (6)
Tape (1)
Rear pane (4)
C aw
C aw
Screws (3)
Connector (2)
Fan (4)
Tape (1)
Hexagona
nuts
Fig. 2-1-5

1-2. PC Board Replacement
1-2-1. Digital PC Board
1. Remove the top cover. (Refer to item 1-1-1.)
2. Disconnect the flexible cable (1).
3. Remove four screws (2), then remove the Digital C board (3).
Note:
• The Digital C board (3) is connected to the Mother C board (4) by three connectors (5). Take notice when removing.
Fig. 2-1-6
Screws (2)
Digita PC
board (3)
F exib e
cab e (1)
F exib e
cab e (1)
Connector
C aw
Connector (5) Connectors (5)
Mother PC board (4)
Remove the connector c aw
in the direction indicated
by the arrows to re ease the
f exib e cab e.

1-2-2. Mother PC Board
1. Remove the rear panel. (Refer to item 1-1-4.)
2. Remove the Digital PC board. (Refer to item 1-2-1.)
3. Disconnect three connectors (1).
4. Remove five scre s (2) .
5. Pull out the Mother PC board (3) to ard the rear side (indicated by the arro ).
Fig. 2-1-7
Screws (2)
Mother PC
board (3)
Connectors (1) Connector (1)