Sharp XL-DAB227NH (serv.man4) Service Manual ▷ View online
XL-DAB227NH
– 1
AUDIO
IN
iPod is a trademark of Apple Inc., registered in
the U.S. and other countries.
the U.S. and other countries.
PRECAUTIONS FOR USING LEAD-FREE SOLDER
CHAPTER 1. GENERAL DESCRIPTION
[1] Safety Precaution For Service Manual .......
[1] Safety Precaution For Service Manual .......
....... 1-1
[2] Important
Service
Notes ..............................
....... 1-1
[3] Specifications ...............................................
....... 1-2
[4] Names Of Parts ..........................................
....... 1-3
CHAPTER 2. ADJUSTMENTS
[1] CD
[1] CD
Section................................................... 2-1
[2] Test
Mode .................................................... 2-2
[3] Standard Specification Of Stereo System
Error Message Display Contents ................. 2-4
CHAPTER 3. MECHANICAL DESCRIPTION
[1] Removing
[1] Removing
And
Reinstalling The Main Parts
..................................................................... 3-1
[2] Disassembly ................................................ 3-2
CHAPTER 4. DIAGRAM
[1] Main Block Diagram..................................... 4-1
[2] CD
[1] Main Block Diagram..................................... 4-1
[2] CD
Block
Diagram ....................................... 4-3
CHAPTER 5. CIRCUIT DESCRIPTION
[1] Waveforms Of Servo Circuit......................... 5-1
[2] Voltage ......................................................... 5-2
[1] Waveforms Of Servo Circuit......................... 5-1
[2] Voltage ......................................................... 5-2
CHAPTER 6. CIRCUIT SCHEMATICS AND PARTS
LAYOUT
[1] Notes
LAYOUT
[1] Notes
On
Schematic
Diagram .....................6-1
[2] Types Of Transistor And LED ...................... 6-1
[3] Schematic
[3] Schematic
Diagram...................................... 6-2
[4] Charts
Of
Connecting
Wires ......................6-24
[5] Wiring Side of PWB ...................................6-26
CHAPTER 7. FLOWCHART
[1] Troubleshooting ...........................................7-1
[1] Troubleshooting ...........................................7-1
CHAPTER 8. OTHER
[1] Function Table Of IC ....................................8-1
[2] FL
[1] Function Table Of IC ....................................8-1
[2] FL
Display .................................................. 8-16
[3] Wiring Of Primary Supply Leads................8-17
PARTS GUIDE
SERVICE MANUAL
No. S9844XDB227NH
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.
specified ones for maintaining the safety and performance of the set.
CONTENTS
!
MICRO COMPONENT SYSTEM
MODEL
XL-DAB227NH Micro component system consisting of
XL-DAB227NH (main unit) and CP-DK227NH (speaker system).
XL-DAB227NH (main unit) and CP-DK227NH (speaker system).
XL-DAB227NH
• In the interests of user-safety (Required by safety regulations in some
countries) the set should be restored to its original condition and only
parts identical to those specified be used.
parts identical to those specified be used.
SHARP CORPORATION
l
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 Performers Protection Acts 1963 and 1972
and subsequent statutory enactments and orders.
SHARP is unable to give. Please refer particularly to the provisions of
Copyright Act 1956, the Performers Protection Acts 1963 and 1972
and subsequent statutory enactments and orders.
XL-DAB227NH
– 2
1. Employing lead-free solder
Example:
Indicates lead-free solder of tin, silver and copper.
2. Using lead-free wire solder
3. Soldering
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.
Be careful when replacing parts with polarity indication on the PWB silk.
Lead-free wire solder for servicing
Ref No.
Description
Parts No.
The LF symbol indicates lead-free solder, and is attached on the PWB and service manuals. The alphabetical
character following LF shows the type of lead-free solder.
character following LF shows the type of lead-free 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, were
commend you to use a dedicated soldring 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.
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, were
commend you to use a dedicated soldring 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.
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 wet ability, 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.
solder by 40 C, and as it has poor solder wet ability, 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.
"MAIN, POWER, AMPLIFIER, HEADPHONE, MICOM REFLASH, DISPLAY, SPEAKER, VOLUME LIGHT UP, DAB,
iPOD, CD PWB" of this model employs lead-free solder.
iPOD, CD PWB" of this model employs lead-free solder.
PRECAUTIONS FOR USING LEAD-FREE SOLDER
PWB-A
92LPWB7376MANS
MAIN (A1), POWER (A2), AMPLIFIER (A3) , HEADPHONE (A4), MICOM REFLASH (A5)
PWB-B
92LPWB7375DPLS
DISPLAY (B1), SPEAKER (B2), VOLUME LIGHT UP (B3)
PWB-C 92LPWB7375PODS iPOD
PWB-D 92LPWB7375DABS DAB
PWB-E 92LPWB7121CDUS CD
i
XL-DAB227NH
1 – 3
CHAPTER 1. GENERAL DESCRIPTION
[1] Safety Precaution For Service Manual
This product is classified as a CLASS 1 LASER PRODUCT.
WARNINGS
THE AEL (ACCESSIBLE EMISSION LEVEL) OF LASER POWER OUTPUT FOR THIS MODEL IS SPECIFIED TO
BE LOWER THAN CLASS
BE LOWER THAN CLASS
I
REQUIREMENTS. HOWEVER, THE FOLLOWING PRECAUTIONS MUST BE OBSERVED
DURING SERVICING TO PROTECT YOUR EYES AGAINTS 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.
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.
HAVE ALREADY BEEN ADJUSTED PRIOR TO SHIPPING.
3-
NO ADJUSTMENT TO THE LASER POWER SHOULD BE ATTEMPTED WHEN REPLACING OR SERVICING
THE PICKUP.
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.
THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.
[2] Important Service Notes
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.
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
Test voltage
4,240 VPEAK
3,000 VRMS
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.
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
AC POWER
SUPPLY CORD
CONNECT THE PROBE
TO GND OF CHASSIS
SCREW
TO GND OF CHASSIS
SCREW
WITHSTANDING
VOLTAGE TESTER
1 – 1
XL-DAB227NH
1 – 4
[3]
Specifications
General
Power source
AC 220 - 240 V ~ 50 Hz
Power consumption
Power on: 40 W
Power stand-by: 0.6 W (*)
Power stand-by: 0.6 W (*)
Dimensions
Width: 180 mm (7 - 1/16")
Height: 260 mm (10 - 2/8")
Depth: 273 mm (10 - 6/8")
Height: 260 mm (10 - 2/8")
Depth: 273 mm (10 - 6/8")
Weight
4.2 kg (9.3 lbs.)
( * )This power consumption value is obtained when the
demonstration mode is cancelled in the power stand-by mode.
CD player
Type
Single disc multi-play compact disc player
Signal readout
Non-contact, 3-beam semiconductor laser
pickup
D/A converter
Multi bit D/A converter
Frequency response 20 - 20,000 Hz
Dynamic range
Dynamic range
90 dB (1 kHz)
Tuner
Frequency range
FM: 87.5 - 108 MHz
DAB: 174.928 - 239.200 MHz
DAB: 174.928 - 239.200 MHz
Amplifier
Output power
MPO: 64 W (32 W + 32 W) (10% T.H.D.)
RMS: 64 W (32 W + 32 W) (10% T.H.D.)
RMS: 40 W (20 W + 20 W) (0.9% T.H.D.)
RMS: 64 W (32 W + 32 W) (10% T.H.D.)
RMS: 40 W (20 W + 20 W) (0.9% T.H.D.)
Output terminals
Speakers: 4 ohms
Headphones: 16 - 50 ohms
(recommended: 32 ohms)
Subwoofer pre-out (audio signal):
150 mV/10 k ohms at 70 Hz
Headphones: 16 - 50 ohms
(recommended: 32 ohms)
Subwoofer pre-out (audio signal):
150 mV/10 k ohms at 70 Hz
Input terminals
Audio In (Audio signal):
250 mV/47 k ohms
250 mV/47 k ohms
DAB Frequency table (BAND III)
Speaker
Frequency
Label
Frequency
Label
174.928 MHz
5A
208.064 MHz
9D
176.640 MHz
5B
209.936 MHz
10A
178.352 MHz
5C
211.648 MHz
10B
180.064 MHz
5D
213.360 MHz
10C
181.936 MHz
6A
215.072 MHz
10D
183.648 MHz
6B
216.928 MHz
11A
185.360 MHz
6C
218.640 MHz
11B
187.072 MHz
6D
220.352 MHz
11C
188.928 MHz
7A
222.064 MHz
11D
190.640 MHz
7B
223.936 MHz
12A
192.352 MHz
7C
225.648 MHz
12B
194.064 MHz
7D
227.360 MHz
12C
195.936 MHz
8A
229.072 MHz
12D
197.648 MHz
8B
230.784 MHz
13A
199.360 MHz
8C
232.496 MHz
13B
201.072 MHz
8D
234.208 MHz
13C
202.928 MHz
9A
235.776 MHz
13D
204.640 MHz
9B
237.488 MHz
13E
206.352 MHz
9C
239.200 MHz
13F
Type
2-way type speaker system
5 cm (2") tweeter
10 cm (4") woofer
5 cm (2") tweeter
10 cm (4") woofer
Maximum input power
64 W
Rated input power
32 W
Impedance
4 ohms
Dimensions
Width: 130 mm (5 - 1/2")
Height: 260 mm (10 - 1/4")
Depth: 164.5 mm (6 - 1/2")
Height: 260 mm (10 - 1/4")
Depth: 164.5 mm (6 - 1/2")
Weight
1.9 kg (4.2 lbs.)/each
1 – 2
