Toshiba DR-250-SB, DR-255-SF, DR-255-SG Service manual
FILE NO. 810-200559
SERVICE MANUAL
DVD RECORDER
D-R250SB
D-R255SF
D-R255SG
JUL. 2005 S
CONTENTS
1. Precautions
2. Product Specification
3. Software Update
4. Disassembly and Reassembly
5. Troubleshooting
6. Exploded View and Parts List
7. Electrical Parts List
8. Block Diagram
9. Wiring Diagram
10. PCB Diagrams
11. Schematic Diagrams
12. Operating Instructions
13. Circuit Operating Descriptions
14. Reference Information
MEMO
1. Precautions
1-1 Safety Precautions
1-1
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
removed for servicing convenience.
(2)When reinstalling the chassis and/or other assembly in the cabinet, be sure to put back in place
all protective devices, including, but not limited to,
nonmetallic 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 fitted 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 230V(220V ~ 240V) AC outlet. (Do
not use an isolation transformer during this test.)
Use a leakage current tester or a metering system
that complies with American National Standards
institute (ANSI) C101.1 Leakage Current for
Appliances and Underwriters Laboratories (UL)
1270 (40.7). With the instrument’s 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.
Reverse 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.
Fig. 1-1 AC Leakage Test
(4) Insulation Resistance Test Cold Check-(1) 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
repaired and rechecked before it is returned to the
customer. See Fig. 1-2.
Fig. 1-2 Insulation Resistance Test
DEVICE
UNDER
TEST
2-WIRE CORD
ALSO TEST WITH
PLUG REVERSED
(USING AC ADAPTER
PLUG AS REQUIRED)
TEST ALL
EXPOSED METER
SURFACES
LEAKAGE
CURRENT
TESTER
(READING SHOULD
NOT BE ABOVE
0.5mA)
EARTH
GROUND
Antenna
Terminal
Exposed
Metal Part
ohm
ohmmeter
Precautions
1-2
2) Read and comply with all caution and safety related notes on or inside the cabinet, or on the chassis.
3) Design Alteration Warning-Do not alter or add to
the mechanical or electrical design of this instrument. Design alterations and additions, including
but not limited to, circuit modifications and the
addition of items such as auxiliary audio output
connections, might alter the safety characteristics of
this instrument and create a hazard to the user. Any
design alterations or additions will make you, the
servicer, responsible for personal injury or property
damage resulting therefrom.
4) Observe original lead dress. Take extra care to
assure correct lead dress in the following areas:
(1) near sharp edges, (2) near thermally hot parts (be
sure that leads and components do not touch thermally hot parts), (3) the AC supply, (4) high voltage,
and (5) antenna wiring. Always inspect in all areas
for pinched, out-of-place, or frayed wiring, Do not
change spacing between a component and the
printed-circuit board. Check the AC power cord for
damage.
5) Components, parts, and/or wiring that appear to
have overheated or that are otherwise damaged
should be replaced with components, parts and/ or
wiring that meet original specifications.
Additionally, determine the cause of overheating
and/or damage and, if necessary, take corrective
action to remove any potential safety hazard.
6) Product Safety Notice-Some electrical and mechanical parts have special safety-related characteristics
which are often not evident from visual inspection,
nor can the protection they give necessarily be
obtained by replacing them with components rated
for higher voltage, wattage, etc. Parts that have special safety characteristics are identified by shading,
an ( )or a ( )on schematics and parts lists. Use
of a substitute replacement that does not have the
same safety characteristics as the recommended
replacement part might create shock, fire and/or
other hazards. Product safety is under review continuously and new instructions are issued whenever appropriate.
Precautions
1-3
CAUTION : Before servicing units covered by this
service manual and its supplements, read and follow
the Safety Precautions section of this manual.
Note : If unforseen circumstances create conflict
between the following servicing precautions and any
of the safety precautions, always follow the safety precautions. Remember: Safety First.
1-2-1 General Servicing Precautions
(1) a. Always unplug the instrument’s AC power cord
from the AC power source before (1) re-moving
or reinstalling any component, circuit board,
module or any other instrument assembly, (2)
disconnecting any instrument electrical plug or
other electrical connection, (3) connecting a test
substitute in parallel with an electrolytic capacitor in the instrument.
b. Do not defeat any plug/socket B+ voltage inter-
locks with which instruments covered by this
service manual might be equipped.
c. Do not apply AC power to this instrument and
/or any of its electrical assemblies unless all
solid-state device heat sinks are correctly installed.
d. Always connect a test instrument’s ground lead
to the instrument chassis ground before connecting the test instrument positive lead. Always
remove the test instrument ground lead last.
Note : Refer to the Safety Precautions section ground
lead last.
(2) The service precautions are indicated or printed on
the cabinet, chassis or components. When servicing, follow the printed or indicated service precautions and service materials.
(3) The components used in the unit have a specified
flame resistance and dielectric strength.
When replacing components, use components
which have the same ratings. Components identified by shading, by( ) or by ( ) in the circuit diagram are important for safety or for the characteristics of the unit. Always replace them with the exact
replacement components.
(4) An insulation tube or tape is sometimes used and
some components are raised above the printed
wiring board for safety. The internal wiring is
sometimes clamped to prevent contact with heating components. Install such elements as they
were.
(5) After servicing, always check that the removed
screws, components, and wiring have been installed correctly and that the portion around the
serviced part has not been damaged and so on.
Further, check the insulation between the blades of
the attachment plug and accessible conductive
parts.
1-2-2 Insulation Checking Procedure
Disconnect the attachment plug from the AC outlet
and turn the power ON. Connect the insulation resistance meter (500V) to the blades of the attachment
plug. The insulation resistance between each blade of
the attachment plug and accessible conductive
parts(see note) should be more than 1 Megohm.
Note : Accessible conductive parts include metal panels, input terminals, earphone jacks, etc.
1-2 Servicing Precautions
Precautions
1-4
Electrostatically Sensitive Devices (ESD)
Some semiconductor (solid state) devices can be damaged easily by static electricity.
Such components commonly are called Electrostatically Sensitive Devices(ESD). Examples of typical ESD
devices are integrated circuits and some field-effect
transistors and semiconductor chip components. The
following techniques should be used to help reduce
the incidence of component damage caused by static
electricity.
(1) Immediately before handling any semiconductor
component or semiconductor-equipped assembly,
drain off any electrostatic charge on your body by
touching a known earth ground. Alternatively,
obtain and wear a commercially available discharging wrist strap device, which should be
removed for potential shock reasons prior to applying power to the unit under test.
(2) After removing an electrical assembly equipped
with ESD devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.
(3) Use only a grounded-tip soldering iron to solder or
unsolder ESD devices.
(4) Use only an anti-static solder removal devices.
Some solder removal devices not classified as
“anti-static” can generate electrical charges sufficient to damage ESD devices.
(5) Do not use freon-propelled chemicals. These can
generate electrical charges sufficient to damage
ESD devices.
(6) Do not remove a replacement ESD device from its
protective package until immediately before your
are ready to install it.(Most replacement ESD
devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or
comparable conductive materials).
(7) Immediately before removing the protective ma-
terials from the leads of a replacement ESD 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 unpack-
aged replacement ESD devices. (Otherwise harmless motion such as the brushing together of your
clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient
to damage an ESD device).
1-3 ESD Precautions
2-1
Power requirements 230V AC,50Hz
Power consumption 35Watts
General
Weight 3.7 Kg
Dimensions 430mm(W) x 272mm(D) x 58mm(H)
Operating temp +5°C to +35°C
Other conditions Keep level when operating. Less than 75% operating humidity
Video Composite Video : 1.0 V p-p at 75ohm load, sync negative
Audio Max. Audio input level : 2Vrms
DV Input IEEE 1394(4p) compatible jack
Input Receivable Channels SECAM L/L’, PAL B/G
Scart Jack
AV1 (Scart TV) Video : Composite, Audio : analogue
AV2 (Scart Ext) Video : Composite, RGB Audio : analogue
Audio
Analogue output jacks X 2
Optical/coaxial digital audio output
Composite Video : Video output jack X 1
Output
Video S-Video output X 1 (Y: 1.0Vp-p, C:0.286Vp-p at 75 ohm load)
Component output X 1 (Y: 1.0Vp-p ,Pb:0.70Vp-p, Pr:0.70Vp-p at 75ohm load)
Scart Jack AV1 (Scart TV) Video : Composite, RGB Audio : analogue
Picture compression format MPEG-II
Audio compression format Dolby digital 2ch/256kbps, MPEG-II
Recording
Recording Quality
XP (about 8.5 Mbps), SP (about 4.5 Mbps), LP (about 2.5 Mbps),
EP (about 1.6 Mbps or about 0.8 Mbps), FR (about 1.2 Mbps to 8Mbps)
Audio frequency characteristics 20 Hz ~ 20 KHz
2. Product Specification
2-1 Product Specification
Product Specification
2-2
MEMO
3-1
3. Software Update
3-1 Drive Firmware Update
3-1-1 Introduction
Toshiba will often support software update to improve the performance of DVD Recorder&VCR to the latest status.
3-1-2 How to make an update disc
• Recommended Application Programme
- Nero Burning / Easy CD Creator ..etc
• Option
- Name : SSC01M222
- Extension name : “*.REC”
- Multisession : No Multisession
- File name lenght : Max. of 11 = 8 + 3
- Format : Mode 1
- Character set : ISO 9660 or Joliet Format
- CD Close & Disc at once
- Label : RAMBO
N O T E
It is very important : please read the below notice before updating your unit.
The following events may interrupt the update process and MAY RESULT IN PERMANENT DAMAGE TO THE UNIT WHILE UPDATING
! The power cord unplugged.
@ Power Outage.
# Dirt or Scratches on the disc.
$ Opening a disc tray during processing.
WARNING
3-2
Software Update
Fig. 3-1
* If you don’t see the message above, try another disc. Generally, this is caused by disc quality and by disc creating problem.
4) Press the OK button on the remote control (Fig. 3-1).
Fig.3-3
5) It takes about 1~2 minutes to complete the update.
The message below will be displayed in the screen after update is completed and the tray will open automatically.
Fig. 3-4
6) After removing the update disc, turn off the unit with power button.
And turn on the unit with power button and then the tray will close.
The drive firmware is now completed.
After checking old and new version, select “Yes” or “No”
with “ ” or “ ” on the remote controller.
* The Version is indicated by “XX.X modelname”
You will see “LOAD” on FLT Display.
Fig. 3-5
1) Press OPEN/CLOSE to open the disc tray.
2) Insert the update CD-R disc with the software update, label
facing up.
3) Press OPEN/CLOSE to close the disc tray.
* It takes about 1~2 minites before the message below appears.
Fig. 3-2 Remote Controller
3-1-3 How to update software
Do you want to update drive-firmware?
Version : YYMMDD.xx.R250 -> YYMMDD.xx.R250
Drive Update
Yes
No
Drive Update
Now, processing...
Please, do not turn off the power.
Drive Update
Drive Firmware is successfully
updated.
Software Update
3-3
3-2 Flash Update
3-2-1 Introduction
Toshiba will often support software update to improve the performance of DVD Recorder&VCR to the latest status.
3-2-2 How to make an update disc
• Recommended Application Program
- Nero Burning / Easy CD Creator ..etc
• Option
- Only single session
- CD close & disc at once
- ISO 9660 or joliet format
- Extension name : “*.RUF”
• In order to increase dise playability, add a dummy file (over 100MB) together with the latest program.
(The dummy file can be used any kind of file except MP3, AVI, MPEG, MPG, divx, LPCM, AAC, Ogg file which can be played in the unit
and we recommend to use a file with extension name as “*.dmy”, which can be changed from original one.)
N O T E
It is very important : please read the below notice before updating your unit.
The following events may interrupt the update process and MAY RESULT IN PERMANENT DAMAGE TO THE UNIT WHILE UPDATING
! The power cord unplugged.
@ Power Outage.
# Dirt or Scratches on the disc.
$ Opening a disc tray during processing.
WARNING
3-4
Software Update
Fig. 3-6
* If you don’t see the message above, try another disc.
Generally, this is caused by disc quality and by disc creating problem.
4) Press the OK button on the remote control (Fig. 3-6).
Fig. 3-8
5) It takes about 5 minutes to complete the update.
The message below will be displayed in the screen after update is completed and the tray will open automatically.
Fig. 3-9
6) After removing the update disc, turn off the unit with power button.
And turn on the unit with power button and then the tray will close.
The Flash update is now completed.
After checking old and new version, select “Yes” or “No”
with “ ” or “ ” on the remote controller.
* The Version is indicated by “YYMMDD.xx modelname”
1) Press OPEN/CLOSE to open the disc tray.
2) Insert the update CD-R disc with the software update, label
facing up.
3) Press OPEN/CLOSE to close the disc tray.
Fig. 3-7 Remote Controller
3-2-3 How to update software
Do you want to update flash memory?
Version : YYMMDD.xx.D-R250 -> YYMMDD.xx.D-R250
Flash Update
Yes
No
Flash Update
Now, processing...
Please, do not turn off the power.
* If the message to the left isn’t displayed after 10minutes
and the unit is no longer functioning properly, contact a
TOSHIBA authorized service center.
Flash Update
Flash memory is successfully
updated.
4-1
4. Disassembly and Reassembly
4-1 Cabinet and PCB
4-1-1 Top Cabinet Removal
1) Remove 5 Screws Œ.
2) Lift up the Top Cabinet in direction of arrow.
Fig. 4-1 Top Cabinet Removal
Note : Reassembly in reverse order.
Π5 SCREWS
4-2
Disassembly and Reaasembly
Fig. 4-2 Ass’y Front-Cabinet Removal
4-1-2 Ass’y Front-Cabinet Removal
1) Release 6 Hooks Œ, ´, ˇ, ¨ and Ass’y Front-Cabinet ˆ.
Π1 HOOK
¨ 2 HOOKS
ˇ 2 HOOKS
´ 1 HOOK
ˆ ASS'Y FRONT-CABINET
Disassembly and Reaasembly
4-3
4-1-3 Ass’y Deck Removal
1) Remove 4 Screws Œ, ´ from the Ass’y Deck and lift it up.
Fig. 4-3 Ass’y Deck Removal
Π2 SCREWS
´ 2 SCREWS
ASS'Y-DECK
4-4
Disassembly and Reaasembly
Fig. 4-4 Main PCB and S.M.P.S. PCB Removal
4-1-4 Main PCB and S.M.P.S. PCB Removal
1) Remove 2 Screws Œ, from the Main PCB ´ and lift it up.
2) Remove 5 Screws ˇ ,¨ from the S.M.P.S. PCB ˆ and lift it up.
Π2 SCREWS
´ MAIN PCB
ˇ 4 SCREWS
¨ 1 SCREW
ˆ SMPS PCB
Disassembly and Reaasembly
4-5
4-1-5 Jack PCB Removal
1) Remove 5 Screws Œ, ´, ˇ from the Jack PCB ¨ and lift it up.
Fig. 4-5 Jack PCB Removal
Π3 SCREWS
JACK PCB
¨
´ 1 SCREW
ˇ
1 SCREW
4-6
Disassembly and Reaasembly
4-1-6 DC FAN Removal
1) Remove 2 Screws Œ, from the DC Fan ´ and lift it up.
Fig. 4-6 DC FAN Removal
´ DC FAN
Π2 SCREWS
Disassembly and Reaasembly
4-7
4-2 PCB Location
Fig. 4-7 PCB Location
JACK PCB
MAIN PCB
S.M.P.S. PCB
4-8
Disassembly and Reaasembly
MEMO
5-1
5. Troubleshooting
NO Power Detected
(Stand by LED OFF)
PAFT1 is normal?
Yes
Pin 6 of IC701 is normal?
No
PVDLL1, PSDZ1
PFZZ1, PVZL1
SHOR and OPEN
re normal?
a
Yes
voltage at
Is there
Collector of
PPQQX1
No
Yes
No
No
Change fuse
Change DT701 LED Module
Change short circuited or
opened parts
Check 2st voltage
Yes
Operation of PQQX1 is
Normal?
Yes
Check feed back PQIZ1
No
Replace PQQX1
Troubleshooting
5-2
CVBS(Video) output error
Pin 12 in CN3 of jack PCB or
CN2 of Main PCB has
normal level?
Yes
Analog signals are
inputed normally
VIC1(pin4)
Yes
Power is
normal(5V) at VIC(pin1,28)?
Yes
Pin3 in VIC1 is
in high state?
No
No
No
No
Check the DIC1 on MAIN B/D
Check the connection between
pin 12 in CN3 of JACK PCB and VIC1
Check the connection between
VIC1(pin1,28) and power line(FD6,VL6).
Check the connection between
VIC1(pin3) and FIC1(39pin).
check VIC1 peripheral circuit
Yes
Video signal of
About P-P1V appears at
Output Jack?
Yes
Check the RCA cable
# IF Recorder is under PSO(progressive scan output) MODE, it does not
No
CVBS(Color-bar)
output the CVBS& S-Video, RGB signal.
Check the connection between
VIC1 and output Jack
Troubleshooting
5-3
Component (Y, Cb, Cr) output error
Pin 2,4,6 Pin in CN3 of
Jack PCB or CN2 of Main PCB
has normal level?
Yes
Analong signals are
inputted normally
VIC1 (pin 10,12,14)
Yes
Power is normal (5V) at
VIC1(Pin1,28)?
Yes
Pin3 in VIC1 is
in high state?
No
No
No
No
Check the DIC1 on Main PCB
Check the connection between pin 2,4,6
in CN3 of JACK PCB and VIC1
Check the connection between
VIC1(pin1,28) and Power line (pin 4 of PCN1)
Check the connection between
VIC1(pin3) and FIC1 (pin 39).
Check VIC1 peripheral circuit.
Yes
Video signal of
About P-P1V appears at
Output Jack?
Yes
Check the RCA cable
# IF Recorder is under PSO(progressive scan output) MODE, or it does not
No
Y(Color-bar)
output the CVBS& S-Video signal.
Check the connection between VIC1
Pb(Color-bar) Pr(Color-bar)
and output Jack
Troubleshooting
5-4
S-Video output error
Pin 10 and pin 8 in CN3 of
Jack PCB or CN2 of Main
PCB has normal level?
Yes
Analog signals are
inputted normally
VIC1(pin4)
Yes
Power is normal (5V)
at VIC1(pin1,28)?
Yes
Pin13 in VIC1 is
In high state?
Yes
No
No
No
No
Check the DIC1 on Main PCB
Check the connection between pin 10 and
pin 8 in CN3 of Jack PCB and VIC1
Check the connection between
VIC1(pin 1,28) and power line(pin 4 of PCN1).
Check the connection between
VIC1(pin13)and FIC1(pin 44)
Check VIC1 peripheral circuit.
Video signals of
about P-P1V appears at
output Jack?
Yes
Check the S-Video cable
No
Y(Color-bar)
Check the connection between
VIC1 and output Jack
C(Color-bar)
Troubleshooting
5-5
AV1 (RGB) Output Error
Pin 2,4, 6 pin in CN3
ofJack PCB or CN2 of Main PCB
has normal level?
Yes
Analog signals are
inputted normally
VIC1(pin 10, 12, 14)
Yes
Power is
normal at VIC1-1,28?
Yes
RGB control signal
level is 4V at pin 16 of
SCJ1 (AV1Jack)?
No
No
No
No
Check Main PCB
Check the connection between pin 2,4,
6 in CN3 of Jack PCB and VIC1.
Check the connection between
pin 1, 28 of VIC1 and power
Check the connection between
pin 13 of SIC1 and AV1 Jack
Yes
RGB Video signal
appears at pin 7, 11, 15 of
AV1 output Jack?
Yes
Check the RCA cable
# IF Recorder is under Component mode (in OSD setup menu),
No
it does not output RGB out put.
Check the connection between
VIC1 and output Jack.
Troubleshooting
5-6
AV1, AV2 (CVBS) output error
Pin 12 of CN3 in
jack PCB has normal
level?
Yes
Analog signal are
Inputted normally
pin 5 of SIC1
Yes
Analog signal are
out normally
SIC1-29(AV2),30(AV1)
Yes
Check the connection between
SIC1 and SCART Jack
-AV1 ; pin 30 of SIC1 and pin 19 of AV1
-AV2 : pin 29 of SIC1 and pin 40 of AV2
No
No
No
supply to pin 2, 4, 6 of SIC1?
Check the I2C line
(between SIC1-32, 33
and FIC1-27, 28)
Check Main PCB
Check the connection between
pin 12 of CN3 in
Check the power
Jack PCB and SIC1
No
Yes
Check the SMPS
(AL5.8V)
Troubleshooting
5-7
AV2 (RGB) Input Error
Video signal of
about 0.7V appears at input jack?
(pin 28, 32, 36 of AV2)
Yes
RGB control signal
level is 4V at pin 27 of SCJ1
(AV1Jack)?
Yes
Check the power
supply to pin 2, 4, 6 of SIC1
Yes
CN3-19,21,23 of
Jack PCB or CN2 of Main PCB
has normal level?
No
No
No
No
Check the Scart cable.
Check Video out of TV is set RGB mode.
Check the SMPS(AL5.8V)
Check the I2C line
(between SIC-32, 33
and FIC1-27)
No
Yes
Check Main PCB
Yes
Check the connection between
CN3-19, 21, 23 and Scart Jack.
Check the pins of FIC1
is not short
Troubleshooting
5-8
AV3 CVBS Video Input Error
Pin 15 in IC201
has normal level?
Yes
Pin 3 in IC201(Input MUX)
has normal level?
Yes
CN3-13 of
jack PCB or CN2 of Main PCB
has normal level?
No
No
No
Check the connection between CN3-13
Check the connection between
pin 15 in IC201 and AV3 pin-jack
Check the connection between
IC201-9, 10, 11 and FIC1
Control signal of pin 9, 10, 11 in
IC201 is as below.
AV3 Input : L/H/L
AV2 Input : H/H/H
AV1 Input : L/H/H
PROG Input : L/L/L
of jack PCB and pin 3 in IC201
Yes
Change Main PCB
Troubleshooting
5-9
There's no Digital Audio Out
Check Current Digital Audio
Setting is PCM.
Yes
Check Digital Audio data
at DR1(Main PCB)
Yes
ChecK Digital Audio data
at pin 10 of CN4
(Main PCB)
Yes
Check 5V AVJ5
No
No
No
No
Check the A/V Receiver
can Decode Current
Bit-Steam
Yes
Replace Main PCB
Replace Main PCB
Replace AVJ5
No
Set the Bitstream
Yes
Check the Cable
AUDIO
DATA
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