DOWNLOAD Sharp SD-PX15H (serv.man20) Service Manual ↓ Size: 6.61 MB | Pages: 98 in PDF or view online for FREE

Model
SD-PX15H (serv.man20)
Pages
98
Size
6.61 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio / System
File
sd-px15h-sm20.pdf
Date

Sharp SD-PX15H (serv.man20) Service Manual ▷ View online

SD-PX15H
 
SERVICE MANUAL
In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.
No. S5432SDPX15H/
SHARP CORPORATION
CONTENTS
Parts marked with "
" are important for maintaining the safety of the set. Be sure to replace these parts with specified ones for
maintaining the safety and performance of the set.
CHAPTER 1. GENERAL DESCRIPTION
[1] Specifications ................................................. 1-1
[2]  Names of parts............................................... 1-3
CHAPTER 2. ADJUSTMENTS
[1] 1-bit 
section.................................................... 2-1
[2] DVD/CD 
section ............................................. 2-1
[3] TEST 
Mode .................................................... 2-1
[4]  Description on the Circuits of the 1-Bit Unit 
(See the wiring diagrams on pages 6-24 - 
6-25.).............................................................. 2-9
[5]  Confirming and Canceling the Detection 
Line of the Protect Circuit............................. 2-10
CHAPTER 3. MECHANISM BLOCKS
[1] Caution 
on 
disassembly ................................. 3-1
[2]  Removing and reinstalling the main parts
........ 3-4
CHAPTER 4. DIAGRAMS
[1] Block 
diagram ................................................ 4-1
CHAPTER 5. CIRCUIT DESCRIPTION
[1]  Notes on schematic diagram .........................5-1
[2]  Types of transistor and LED ..........................5-1
[3]  Waveforms of 1-BIT circuit ............................5-2
[4]  Waveforms of DVD circuit..............................5-2
[5] Voltage...........................................................5-3
CHAPTER 6. CIRCUIT SCHEMATICS AND PARTS
LAYOUT
[1]  Wiring side of PWB........................................6-1
[2] Schematic 
diagram......................................6-14
CHAPTER 7. FLOWCHART
[1] Troubleshooting .............................................7-1
CHAPTER 8. OTHER
[1]  Function table of IC .......................................8-1
Parts Guide
1-BIT DIGITAL HOME CINEMA WITH DVD
SD-PX15H
MODEL
SD-PX15H 1-Bit Digital Home Cinema with DVD consist-
ing of SD-PX15H (main unit), CP-PX15HF (front speakers),
CP-PX15HC (center speaker), CP-PX15HS (surround
speakers) and CP-PX15HSW (subwoofer).
SD-PX15H
 – i –
[1] Safety precaution for service manual
Precaution to be taken when replacing and servicing the
Laser Pickup.
The AEL (Accessible Emission Level) of Laser Power Output
for this model is specified to be lower than Class 1 Require-
ments. However, the following precautions must be observed
during servicing to protect your eyes against exposure to the
Laser beam.
(1) When the cabinet has been removed, the power is turned
on without a compact disc, and the Pickup is on a position
outer than the lead-in position, the Laser will light for sev-
eral seconds to detect a disc. Do not look into the Pickup
Lens.
(2) The Laser Power Output of the Pickup inside the unit and
replacement service parts have already been adjusted prior
to shipping.
(3) No adjustment to the Laser Power should be attempted
when replacing or servicing the Pickup.
(4) Under no circumstances look directly into the Pickup Lens
at any time.
(5) CAUTION - Use of controls or adjustments, or performance
of procedures other than those specified herein may result
in hazardous radiation exposure.
[2] Important service notes (For U.K. only)
Before returning the unit to the customer after completion of a
repair or adjustment it is necessary for the following withstand
voltage test to be applied to ensure the unit is safe for the cus-
tomer to use.
Setting of Withstanding Voltage Tester and set.
Material: AlGaAs/AlGalnP
Wavelength: 785 nm/650 nm
Emission Duration: continuous
Laser Output: max. 0.6 mW
Laser Diode Properties
Set name
set value
Withstanding Voltage Tester
Test voltage
4.7 kV DC
Set time
3 secs
Set current (Cutoff current)
3 mA
Unit
Judgment
OK: The "GOOD" lamp lights.
NG: The "NG" lamp lights and the buzzer sounds.
PROBE
AC
OUT
UNIT
SHORT-CIRCUIT
AC POWER
SUPPLY CORD
CONNECT THE PROBE
TO GND OF CHASSIS
SCREW
WITHSTANDING
VOLTAGE TESTER
SD-PX15H
 
– ii –
PRECAUTIONS FOR USING LEAD-FREE SOLDER
1. Employing lead-free solder
"All PWBs" of this model employs lead-free solder. The LF symbol indicates lead-free solder, and is attached on the PWBs and service manuals. The
alphabetical character following LF shows the type of lead-free solder.
Example:
Indicates lead-free solder of tin, silver and copper.
2. Using lead-free wire solder
When fixing the PWB soldered with the lead-free solder, apply lead-free wire solder. Repairing with conventional lead wire solder may cause damage
or accident due to cracks.
As the melting point of lead-free solder (Sn-Ag-Cu) is higher than the lead wire solder by 40 °C, we recommend you to use a dedicated soldering bit,
if you are not familiar with how to obtain lead-free wire solder or soldering bit, contact our service station or service branch in your area.
3. Soldering
As the melting point of lead-free solder (Sn-Ag-Cu) is about 220 °C which is higher than the conventional lead solder by 40 °C, and as it has poor
solder wettability, you may be apt to keep the soldering bit in contact with the PWB for extended period of time. However, Since the land may be
peeled off or the maximum heat-resistance temperature of parts may be exceeded, remove the bit from the PWB as soon as you confirm the steady
soldering condition.
Lead-free solder contains more tin, and the end of the soldering bit may be easily corrected. Make sure to turn on and off the power of the bit as
required.
If a different type of solder stays on the tip of the soldering bit, it is alloyed with lead-free solder. Clean the bit after every use of it.
When the tip of the soldering bit is blackened during use, file it with steel wool or fine sandpaper.
Be careful when replacing parts with polarity indication on the PWB silk.
Lead-free wire solder for servicing
Ref No.
Parts No.
Description
PWB-C
92LPWB5420AMPS
1-Bit Amp.
SD-PX15H
1 – 1
Audio
SD-PX15H
Service Manual
SD-PX15H
Market
E
 
CHAPTER 1. 
GENERAL DESCRIPTION
[1] Specifications
General
Power source
AC 230 V, 50 Hz
Power consumption
50 W
Dimensions
Width: 368 mm
Height: 245 mm
Depth: 114 mm
Weight
3.7 kg
Audio output termi-
nals
Front speakers, Centre speaker, Surround speakers and
Subwoofer: more than 4 ohms (4 ohms min.)
Headphones: 16 - 50 ohms (recommended: 32 ohms)
Subwoofer Pre Out: RCA type
1
Optical digital output: Square type
1
Audio output (VCR): RCA type
1 pair (L/R)
Audio input terminals
Audio input (TV, VCR): Cinch type
2 pairs (L/R)
Coaxial digital input (AUX): RCA type
1
Optical digital input (TV): Square type
1
Monitor output termi-
nals
SCART output: SCART terminal
1
Video output: RCA type
1
S-video output: S-terminal
1
Amplifier
SACD/DVD player
Tuner
Amplification system
5.6448 MHz (128 fs) 1-bit switching (Remarks: fs = 44.1
kHz)
Rated power output
Front speakers:
RMS: 70 W (35 W + 35 W) (10 % T.H.D., 1 kHz)
Centre speaker:
RMS: 35 W (10 % T.H.D., 1 kHz)
Surround speakers:
RMS: 70 W (35 W + 35 W) (10 % T.H.D., 1 kHz)
Subwoofer:
RMS: 35 W (10 % T.H.D., 100 Hz)
A/D noise shaping
7th-order
(delta - sigma) modulation
Signal system
PAL
Supported disc types
DVD-Video/Audio (Region number 2), SACD, DVD-R/RW
(video mode), super video CD, video CD, audio CD,
CD-R, CD-RW
Video signal
Horizontal resolution: 500 lines
S/N ratio: 70 dB
Audio signal
Frequency character-
istics
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 distor-
tion ratio
0.006 % maximum
Frequency range
FM: 87.5 - 108 MHz
AM: 522 - 1,620 kHz
Type
Bass Reflex, 2-way system (Magnetic shield)
8 cm Woofer
5 cm Tweeter
Impedance
4 ohms
Dimensions
Width: 110 mm
Height: 246 mm
Depth: 124 mm
Weight
1.1 kg/each
Type
Bass Reflex, 2-way system (Magnetic shield)
8 cm Woofer
5 cm Tweeter
Impedance
4 ohms
Dimensions
Width: 219 mm
Height: 90 mm
Depth: 106 mm
Weight
1.0 kg
Type
Bass Reflex, Full range system
8 cm speaker
Impedance
4 ohms
Dimensions
Width: 110 mm
Height: 246 mm
Depth: 124 mm
Weight
0.9 kg/each
Type
Bass Reflex, 1-way system
16 cm woofer
Impedance
4 ohms
Dimensions
Width: 183 mm
Height: 304 mm
Depth: 310 mm
Weight
4.3 kg
SD-PX15H (Except for U.K.)
CP-PX15HF (Except for U.K.)
CP-PX15HC (Except for U.K.)
CP-PX15HS (Except for U.K.)
CP-PX15HSW (Except for U.K.)
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO
THE OPERATION MANUAL.
Specifications for this model are subject to change without prior
notice
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Sharp SD-PX15H (serv.man20) Service Manual ▷ Download

  • DOWNLOAD Sharp SD-PX15H (serv.man20) Service Manual ↓ Size: 6.61 MB | Pages: 98 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sharp SD-PX15H (serv.man20) in PDF for free, which will help you to disassemble, recover, fix and repair Sharp SD-PX15H (serv.man20) System. Information contained in Sharp SD-PX15H (serv.man20) 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.