Sony RDRGXD455 - DVD Recorder With TV Tuner User manual

US Model
SERVICE MANUAL
DVD RECORDER
SPECIFICATIONS
RMT-D244A
RDR-GXD455
System
[DVD recorder section]
Laser
Semiconductor laser
Audio recording format
Dolby Digital
Video recording format
MPEG Video
[Tuner section]
Television system
NTSC: American TV standard
ATSC (8VSBterrestrial): ATSC compliant
8VSB
QAM on cable: ANSI/SCTE 07 2000
(Does not include CableCARD
functionality)
Channel coverage
Terrestrial
Analog 2-69 Digital 2-69
Cable
Analog 1-125 Digital 1-135
Antenna
75-ohm antenna terminal for VHF/UHF
[Timer section]
Clock
Quartz locked
Timer indication
12-hour cycle
Timer setting
12 programs in total (max.)
Inputs and outputs
LINE 1 IN and LINE 2 IN
VIDEO IN, phono jack (1 each)
Input signal: 1 Vp-p, 75 ohms, unbalanced,
sync negative
AUDIO IN, phono jacks (2 each)
Input level: 327 mVrms
Input impedance: more than 47 kilohms
LINE 2 IN
S VIDEO, 4-pin, mini-DIN jack
Y: 1.0 Vp-p, unbalanced, sync negative
C: 0.286 Vp-p, load impedance 75 ohms
DV IN, 4-pin jack, i.LINK S100
LINE OUT
VIDEO OUT, phono jack (1)
Output signal: 1 Vp-p, 75 ohms,
unbalanced, sync negative
AUDIO OUT, phono jacks (2)
Standard output: 327 mVrms
Load impedance: 47 kilohms
Output impedance: less than 10 kilohms
DIGITAL AUDIO OUT
OPTICAL, Optical output jack
–18 dBm (wave length: 660 nm)
COAXIAL, phono jack
Output signal: 0.5 Vp-p, 75 ohms
COMPONENT VIDEO OUT (Y, PB, PR)
Phono jack
Y: 1.0 Vp-p/P
B , P R : 0.7 Vp-p, 75 ohms
SVIDEO OUT
4-pin, mini-DIN jack
Y: 1.0 Vp-p, unbalanced, sync negative
C: 0.286 Vp-p, load impedance 75 ohms
HDMI
HDMI 19 pin-Standard Connector
— Continued on next page —
Ver. 1.1 2007.07

— 2 —
General
Power requirements
120 V AC, 60 Hz
Power consumption
28 W
Power back-up
Back-up duration: 0 min
Operating temperature
5°C to 35°C (41°F to 95°F)
Storage temperature
–20°C to 60°C (–4°F to 140°F)
Operating humidity
25% to 80%
Dimensions including projecting parts
and controls (w/h/d)
Approx. 430 ×70 ×287 mm
(Approx. 17 ×2
7
/8×11
3
/8inches)
Mass
Approx. 3.2 kg (Approx. 7.1 lbs)
Supplied accessories
Remote commander (remote) (1)
Size AA (R6) batteries (2)
Antenna cable (1)
Audio/video cord (1)
Design and specifications are subject to change
without notice.

— 3 —
WARNING!!
WHEN SERVICING, DO NOT APPROACH THE LASER
EXIT WITH THE EYE TOO CLOSELY. IN CASE IT IS
NECESSARY TO CONFIRM LASER BEAM EMISSION,
BE SURE TO OBSERVE FROM A DISTANCE OF MORE
THAN 25 cm FROM THE SURFACE OF THE
OBJECTIVE LENS ON THE OPTICAL PICK-UP BLOCK.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED
LINE WITH MARK 0ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
CAUTION:
The use of optical instrument with this product will increase eye
hazard.
Fig. A. Using an AC voltmeter to check AC leakage.
1.5 k Ω 0.15 µFAC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
LEAKAGETEST
The AC leakage from any exposed metal part to earth ground
and from all exposed metal parts to any exposed metal part having
a return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers' instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuringthe voltage drop across aresistor by meansof aVOM
or battery-operated AC voltmeter. The “limit” indication is
0.75V, so analogmeters must have anaccuratelow-voltage scale.
The Simpson 250 and Sanwa SH-63Trd are examples of a
passiveVOM that is suitable. Nearly all battery operated digital
multimeters that have a 2VAC range are suitable. (See Fig.A)
1. Check the area of your repair for unsoldered or poorly-soldered
connections. Check the entire board surface for solder splashes
and bridges.
2. Check the interboard wiring to ensure that no wires are
“pinched” or contact high-wattage resistors.
3. Lookfor unauthorized replacementparts, particularly transistors,
that were installed during a previous repair. Point them out to
the customer and recommend their replacement.
4. Look for parts which, though functioning, show obvious signs
ofdeterioration. Point themout tothe customer andrecommend
their replacement.
5. Check the line cord for cracks and abrasion. Recommend the
replacement of any such line cord to the customer.
6. Check the B+ voltage to see it is at the values specified.
7. Check the antenna terminals, metal trim, “metallized” knobs,
screws,andall otherexposedmetal partsforACleakage. Check
leakage as described below.
SAFETY CHECK-OUT
After correcting the original service problem, perform the following
safety checks before releasing the set to the customer:
Unleaded solder
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size.)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
•Unleaded solder melts at a temperature about 40°C higher than
ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350°C.
Caution: The printed pattern (copper foil) may peel away if the
heated tip is applied for too long, so be careful!
•Strong viscosity
Unleaded solder is more viscous (sticky, less prone to flow) than
ordinary solder so use caution not to let solder bridges occur such
as on IC pins, etc.
•Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.

— 4 —
TABLE OF CONTENTS
Precautions
1Safety Precautions ······························································ 5
2Servicing Precautions ························································ 7
3ESD Precautions ································································· 8
4Handling the Optical Pick-up ············································· 9
1. General
Hookups and Settings ······················································1-2
Quick Guide to Disc Types··············································1-6
Playback ··········································································1-8
Recording ······································································1-10
Editing ···········································································1-13
DV/D8 Dubbing (DV/D8 tDVD) ······························1-17
Settings and Adjustments ··············································1-18
Additional Information··················································1-20
2. Disassembly and Reassembly
2-1 Cabinet and PCB ····························································2-1
2-1-1 Cabinet Top Removal ·····················································2-1
2-1-2 Ass’y Front Panel Removal············································2-1
2-1-3 Chassis Removal ····························································2-2
2-2 Circuit Board Locations ·················································2-3
3. Block Diagram ..........................................................3-1
4. PCB Diagrams
4-1 DVD Main PCB ······························································4-3
4-2 Front Main PCB ······························································4-7
4-3 Function Timer PCB······················································4-11
5. Schematic Diagrams
5-1 S.M.P.S (Front Main PCB) ··············································5-3
5-2 Power (Front Main PCB)·················································5-5
5-3 Logic (Front Main PCB) ·················································5-7
5-4 ATSC TM & Connector (Front Main PCB) ····················5-9
5-5 MPEG Decoder (DVD Main PCB) ·······························5-11
5-6 A/V Decoder (DVD Main PCB) ···································5-13
5-7 In Out (DVD Main PCB) ··············································5-15
5-8 DV & HDMI (DVD Main PCB) ···································5-17
5-9 Front Panel (Function Timer PCB) ·······························5-19
5-10 Function & Jack (VCR Front Main PCB) ·····················5-21
6. Troubleshooting ·················································6-1
7. Repair Parts List
7-1 Exploded Views ·······························································7-2
7-2 Electrical Parts List ·························································7-3

— 5 —
PRECAUTIONS
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 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 isolationresistor/capacitornetworks. Do notoperate
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 120V 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 forAppliances and Underwriters Laboratories
(UL) 1270 (40.7). With the instrument’s AC switch first in the
ONposition andthenin the OFFposition, measure fromaknown
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.
Anymeasurementsnot withinthelimits specified hereinindicate
apotential shockhazard that mustbe eliminatedbeforereturning
the instrument to the customer.
(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)
Measurethe resistancewith anohmmeter betweenthe jumpered
AC plugand allexposedmetalliccabinet parts on theinstrument,
such as screwheads, antenna, control shafts, handle brackets,
etc. When an exposed metallic part has a return path to the
chassis,the readingshould be between1 and5.2megohm.When
there is no return path to the chassis, the reading must beinfinite.
If the reading is not within the limits specified, there is the
possibilityof ashock hazard, andthe instrumentmust be repared
and rechecked before it is returned to the customer. See Fig. 2.
DEVICE
UNDER
TEST
(READING SHOULD
NOT BE ABOVE
0.5mA)
LEAKAGE
CURRENT
TESTER
EARTH
GROUND
TEST ALL
EXPOSED METER
SURFACES
ALSO TEST WITH
PLUG REVERSED
(USING AC ADAPTER
PLUG AS REQUIRED)
2-WIRE CORD
Fig. 1 AC Leakage Test
Fig. 2 Insulation Resistance Test
2) Read and comply with all caution and safety related notes on or
inside the cabinet, or on the chassis.
3) DesignAlterationWarning-Donot alteroradd tothemechanical
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,
mightalter thesafety characteristics ofthis instrument andcreate
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/orwiring thatappear 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.
Antenna
Terminal
Exposed
Metal Part
ohm ohmmeter