DOWNLOAD Sharp DX-AT50H (serv.man21) Service Manual ↓ Size: 3.04 MB | Pages: 76 in PDF or view online for FREE

Model
DX-AT50H (serv.man21)
Pages
76
Size
3.04 MB
Type
PDF
Document
Service Manual
Brand
Device
DVD / complete
File
dx-at50h-sm21.pdf
Date

Sharp DX-AT50H (serv.man21) Service Manual ▷ View online

DX-AT50H
No. S0290DXAT50H/
 CONTENTS
Page
IMPORTANT SAFEGUARDS AND PRECAUTIONS (FOR U.K. ONLY) ...........................................................................  2
SPECIFICATIONS .............................................................................................................................................................  4
NAMES OF PARTS ...........................................................................................................................................................  5
LASER BEAM SAFETY PRECAUTIONS ..........................................................................................................................  6
STANDARD NOTES FOR SERVICING .............................................................................................................................  7
CABINET DISASSEMBLY INSTRUCTIONS ...................................................................................................................  10
ADDITIONAL DESCRIPTION ..........................................................................................................................................  14
TEST MODE ....................................................................................................................................................................  15
WIRING DIAGRAM ..........................................................................................................................................................  20
BLOCK DIAGRAM ...........................................................................................................................................................  22
SCHEMATIC DIAGRAMS / CBA'S AND TEST POINTS .................................................................................................  34
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD .............................................................................................  36
WAVEFORMS OF DVD CIRCUIT ...................................................................................................................................  54
TROUBLESHOOTING .....................................................................................................................................................  55
SYSTEM CONTROL TIMING CHARTS ..........................................................................................................................  61
IC PIN FUNCTION DESCRIPTIONS ...............................................................................................................................  62
LEAD IDENTIFICATIONS ................................................................................................................................................  63
REPLACEMENT PARTS LIST/EXPLODED VIEW
PACKING METHOD (FOR U.K. ONLY)
SERVICE MANUAL
SHARP CORPORATION
• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.
DVD PLYAER
MODEL   
DX-AT50H
DX-AT50H
– 2 –
1. IMPORTANT SERVICE NOTES
BEFORE RETURNING THE DVD VIDEO PLAYER
Before returning the DVD video player to the user,
perform the following safety checks.
1. Inspect all lead dress to make certain that leads are
not pinched or that hardware is not lodged between
the chassis and other metal parts in the DVD video
player.
2. Inspect all protective devices such as non-metallic
control knobs, insulation materials, cabinet backs,
adjustment and compartment covers or shields, isola-
tion resistor/capacitor networks, mechanical insula-
tors etc.
3. To be sure that no shock hazard exists, check for
current in the following manner.
Plug the AC line cord directly into a 230 volt AC outlet
(Do not use an isolation transformer for this test).
Using two clip leads, connect a 1.5 kohm, 10 watt
resistor paralleled by a 0.15 
µ
F capacitor in series with
all exposed metal cabinet parts and a known earth
ground, such as a water pipe or conduit.
Use an DVM or VOM with 1000 ohm per volt, or higher,
sensitivity or measure the AC voltage drop across the
resistor (See Diagram).
Move the resistor connection to earth exposed metal
part having a return path to the chassis (metal cabinet,
screw heads, knobs and control shafts, etc.) and
measure the AC voltage drop across the resistor.
Reverse the AC plug on the set and repeat AC voltage
measurements for each exposed part. Any reading of
1.4 V rms (this corresponds to 0.7 mA rms AC.) or
more is excessive and indicates a potential shock
hazard which must be corrected before returning the
DVD video player to the owner.
IMPORTANT SAFEGUARDS AND PRECAUTIONS (FOR U.K. ONLY)
SSVM
AC SCALE
2k ohms.
10W
0.15
TEST PROBE
TO EXPOSED
METAL PARTS
CONNECT TO
KNOWN EARTH 
GROUNG
F
DX-AT50H
– 3 –
How to manual eject
Remove the top cabinet, the bottom cabinet, the top support angle and the front unit.
(Refer to “CABINET DISASSEMBLY INSTRUCTIONS” (page 10).)
The trays can be ejected when the slide board is moved to the left with a thin screwdriver as shown in the figure below.
Tray
Screwdriver
Slide Plate
Front View
To run the DVD player unit separately
This unit is configured to run when connected to the AV control unit with the system cable. To run the unit separately for repair
or any other reason, make the short land JJ703 shown in the figure open. There is no problem even if it is not returned to the short
state after completing the work.
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.
WF6
Q1351
Base
DVD MAIN PWB (BOTTOM VIEW)
JJ703
DX-AT50
– 4 –
SPECIFICATIONS
NOTES:
1. All Items are measured without pre-emphasis unless otherwise specified.
2. Power supply : AC 230 V, 50 Hz
3. Load imp. : 100 kohm
4. Room ambient : +25 
°
C
1. Video Output
75 ohm load 
75 ohm load 
Vpp
1.0
ITEM
CONDITIONS
UNIT
NOMINAL
LIMIT
2. Digital Out (COAXIAL)
Vpp
0.5
3. Audio (PCM)
3-1. Output Level
1 kHz 0dB
Vrms
2.0
3-2. S/N
dB
110
3-3. Freq. Response
CD
fs=44.1 kHz 20~20 kHz
dB
 
±
 2
3-4. THD+N
1 kHz 0dB
%
0.005
DVD
fs=48 kHz 20~22 kHz
dB
 
±
 2
DVD player
Power source
AC 230 V, 50 Hz
Power consumption
15 W
Dimensions
Width: 215 mm (8-1/2")
Height: 58 mm (2-5/16")
Depth: 257 mm (10-1/8")
Weight
2.0 kg (4.4 lbs.)
Signal system
PAL colour
Supported disc types
DVD (Region number 2, ALL), audio CD, CD-R, CD-RW
Video signal
Horizontal resolution: 500 lines
S/N ratio: 70 dB
Audio signal
Frequency 
charactoristics
Linear PCM DVD:
4 Hz to 22 kHz (sampling rate: 
48 kHz)
4 Hz to 44 kHz (sampling rate: 
96 kHz)
CD: 4 Hz to 20 kHz
S/N ratio
CD: 96 dB (1 kHz)
Dynamic range
Linear PCM DVD: 95 dB
CD: 94 dB
Total harmonic 
distortion ratio
0.006 % maximum
Audio output 
terminals
Coaxial digital output: RCA type   1
Analog output: RCA type   1 pair (L/R)
Video output 
terminals
Video output: RCA type   1
S-video output: S-terminal   1
Component video output: RCA type   3
Other terminal
System control   1
Page of 76
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Sharp DX-AT50H (serv.man21) Service Manual ▷ Download

  • DOWNLOAD Sharp DX-AT50H (serv.man21) Service Manual ↓ Size: 3.04 MB | Pages: 76 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sharp DX-AT50H (serv.man21) in PDF for free, which will help you to disassemble, recover, fix and repair Sharp DX-AT50H (serv.man21) DVD. Information contained in Sharp DX-AT50H (serv.man21) Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.