CD-E250 (serv.man20) — Sharp Audio Service Manual (repair manual)

Model
CD-E250 (serv.man20)
Pages
68
Size
3.52 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio / System
File
cd-e250-sm20.pdf
Date

View Sharp CD-E250 (serv.man20) Service Manual online

CD-E250E
CD-E550E
No. S4341CDE250E/
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.
MINI COMPONENT SYSTEM
MODEL
CD-E250E
CD-E250E Mini Component System consisting of CD-E250E
(main unit), CP-E250E (front speakers) and GBOXS5001SJB1
(surround speakers).
MODEL
CD-E550E
CD-E550E Mini Component System consisting of CD-E550E
(main unit), CP-E550E (front speakers) and GBOXS5001SJB2
(surround speakers).
• Note for users in U.K.
Recording and playback of any material may require consent
which SHARP is unable to give. Please refer particularly to the
provisions of Copyright Act 1956, the Dramatic and Musical
Performers Protection Act 1956, the Performers Protection Acts
1963 and 1972 and to any subsequent statutory enactments and
orders.
Page
SAFETY PRECAUTION FOR SERVICE MANUAL ...........................................................................................................  2
IMPORTANT SERVICE NOTES (FOR U.K. ONLY) ..........................................................................................................  2
SPECIFICATIONS .............................................................................................................................................................  3
NAMES OF PARTS ...........................................................................................................................................................  4
DISASSEMBLY ..................................................................................................................................................................  6
REMOVING AND REINSTALLING THE MAIN PARTS .....................................................................................................  8
ADJUSTMENT .................................................................................................................................................................  11
TEST MODE ....................................................................................................................................................................  12
NOTES ON SCHEMATIC DIAGRAM ..............................................................................................................................  16
TYPES OF TRANSISTOR AND LED ...............................................................................................................................  16
WAVEFORMS OF CD CIRCUIT ......................................................................................................................................  17
BLOCK DIAGRAM ...........................................................................................................................................................  18
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD .............................................................................................  22
VOLTAGE ........................................................................................................................................................................  44
TROUBLESHOOTING .....................................................................................................................................................  45
FUNCTION TABLE OF IC ................................................................................................................................................  49
FL DISPLAY .....................................................................................................................................................................  55
REPLACEMENT PARTS LIST/EXPLODED VIEW
PACKING METHOD (FOR U.K. ONLY)
 CONTENTS
Illustration CD-E250E
Illustration CD-E550E
CD-E250E
CD-E550E
– 2 –
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 Requirements.
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 several 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.
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
customer to use.
Setting of Withstanding Voltage Tester and set.
Set name
set value
Withstanding Voltage Tester
Test voltage
4,240 VPEAK
3,000 VRMS
Set time
6 secs
Set current (Cutoff current)
4 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
Laser Diode Properties
Material: GaAIAs
Wavelength: 780 nm
Emission Duration: continuous
Laser Output: max. 0.6 mW
– 3 –
CD-E250E
CD-E550E
SPECIFICATIONS
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
CD player
Tuner
Cassette deck
Front speaker
Surround speaker
Type
3-disc multi-play compact disc player
Signal readout
Non-contact, 3-beam semiconductor laser 
pickup
D/A converter
1-bit D/A converter
Frequency 
response
20 - 20,000 Hz
Dynamic range
90 dB (1 kHz)
Frequency range
FM: 87.5 - 108 MHz
AM: 522 - 1,620 kHz
Frequency 
response
125 - 8,000 Hz (normal tape)
Signal/noise ratio
50 dB (TAPE 1, playback) 
50 dB (TAPE 2, recording/playback)
Wow and flutter
0.3 % (WRMS)
Type
2-way type speaker system
5 cm (2") tweeter
10 cm (4") woofer
Maximum input 
power
46 W
Rated input power
23 W
Impedance
8 ohms
Dimensions
Width: 200 mm (7-7/8") 
Height: 305 mm (12") 
Depth: 175 mm (6-7/8")
Weight
2.8 kg (6.2 lbs.)/each
Type
8 cm (3-1/8") full-range speaker
Maximum input 
power
20 W
Rated input power
10 W
Impedance
16 ohms
Dimensions
Width: 195 mm (7-11/16") 
Height: 100 mm (4") 
Depth: 140 mm (5-1/2")
Weight
0.7 kg (1.5 lbs.)/each
General
Amplifier
Power source
AC 230 - 240 V, 50 Hz
Power 
consumption
78 W
Dimensions
Width: 270 mm (10-5/8") 
Height: 305 mm (12") 
Depth: 342 mm (13-1/2")
Weight
6.4 kg (14.1 lbs.)
Output power
Front speakers:
RMS: 46 W (23 W + 23 W) (10 % T.H.D.)
RMS: 33 W (16.5 W + 16.5 W) (0.9 % 
T.H.D.)
Surround speakers:
RMS: 20 W (10 W + 10 W) (10 % T.H.D.)
RMS: 17 W (8.5 W + 8.5 W) (0.9 % T.H.D.)
Output terminals
Front speakers: 8 ohms
Surround speakers: 16 ohms
Headphones: 16 - 50 ohms (recommended: 
32 ohms)
Input terminals
Video/Auxiliary (audio signal): 500 mV/47 k 
ohms
CD-E250E
CD-E550E
CD player
Tuner
Cassette deck
Front speaker
Surround speaker
Type
3-disc multi-play compact disc player
Signal readout
Non-contact, 3-beam semiconductor laser 
pickup
D/A converter
1-bit D/A converter
Frequency 
response
20 - 20,000 Hz
Dynamic range
90 dB (1 kHz)
Frequency range
FM: 87.5 - 108 MHz
AM: 522 - 1,620 kHz
Frequency 
response
125 - 8,000 Hz (normal tape)
Signal/noise ratio
50 dB (TAPE 1, playback) 
50 dB (TAPE 2, recording/playback)
Wow and flutter
0.3 % (WRMS)
Type
2-way type speaker system
5 cm (2") tweeter
13 cm (5") woofer
Maximum input 
power
68 W
Rated input power
34 W
Impedance
8 ohms
Dimensions
Width: 200 mm (7-7/8") 
Height: 305 mm (12") 
Depth: 205 mm (8-1/16")
Weight
3.5 kg (7.7 lbs.)/each
Type
8 cm (3-1/8") full-range speaker
Maximum input 
power
32 W
Rated input power
16 W
Impedance
16 ohms
Dimensions
Width: 195 mm (7-11/16") 
Height: 100 mm (4") 
Depth: 140 mm (5-1/2")
Weight
0.7 kg (1.5 lbs.)/each
General
Amplifier
Power source
AC 240 V, 50 Hz
Power 
consumption
105 W
Dimensions
Width: 270 mm (10-5/8") 
Height: 305 mm (12") 
Depth: 342 mm (13-1/2")
Weight
6.8 kg (15.0 lbs.)
Output power
Front speakers:
RMS: 68 W (34 W + 34 W) (10 % T.H.D.)
RMS: 52 W (26 W + 26 W) (0.9 % T.H.D.)
Surround speakers:
RMS: 32 W (16 W + 16 W) (10 % T.H.D.)
RMS: 24 W (12 W + 12 W) (0.9 % T.H.D.)
Output terminals
Front speakers: 8 ohms
Surround speakers: 16 ohms
Headphones: 16 - 50 ohms (recommended: 
32 ohms)
Input terminals
Video/Auxiliary (audio signal): 500 mV/47 k 
ohms
Specifications for this model are subject to change without
prior notice.
CD-E250E
CD-E550E
– 4 –
NAMES OF PARTS
Front panel
1. Disc Tray
2. Timer Set Indicator
3. Memory/Set Button
4. On/Stand-by Button
5. Clock Button
6. Timer/Sleep Button
7. Tuning and Time Up Button
8. Tuning and Time Down Button
9. Headphone Socket 
10. Tape 2 Record Pause Button
11. Tape 1 Cassette Compartment
12. Equaliser Mode Select Button
13. Extra Bass/Demo Mode Button
14. Volume Up and Down Buttons
15. Disc Tray Open/Close Button
16. Disc Skip Button
17. Tape 2 Cassette Compartment
18. CD Button
19. Tape (1   2) Button
20. CD or Tape Stop Button
21. CD Track Down or Fast Reverse, Tape 2 Rewind,
Tuner Preset Down Button
22. Tuner (Band) Button
23. Video/Auxiliary Button
24. CD Play or Repeat, Tape Play Button
25. CD Track Up or Fast Forward, Tape 2 Fast Forward,
Tuner Preset Up Button
3
4
5
2
1
6
11
7
8
9
10
12
16
14
15
17
13
22
23
24
25
18
19
20
21
Display
1. Disc Number Indicators
2. CD Play Indicator
3. Tape Play Indicator
4. FM Stereo Mode Indicator
5. FM Stereo Receiving Indicator
6. Memory Indicator
7. Extra Bass Indicator
8. Timer Recording Indicator
9. Timer Play Indicator
10. CD Pause Indicator
11. CD Repeat Play Indicator
12. Tape 2 Record Indicator
13. Sleep Indicator
 
 
Rear panel
1. Video/Auxiliary (Audio Signal) Input Sockets
2. Cooling Fan [CD-E550E ONLY]
3. AC Power Input Socket
4. FM/AM Loop Aerial Socket
5. Front Speaker Terminals
6. Surround Speaker Terminals
1
2
1
3
4 5 6 7
8
9
13
12
10 11
4
3
2
5
6
Page of 68
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Download Sharp CD-E250 (serv.man20) Service Manual (Repair Manual)

Here you can view online or download Sharp CD-E250 (serv.man20) Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Sharp CD-E250 (serv.man20) System. Information contained in Sharp CD-E250 (serv.man20) service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).