Sharp xl dab 9 h service manual

Page 1

XL-DABQH

SHARP SERVICE MANUAL

COMPACT
[flflglfi @R'D'S BM co-R/RW/
menu AunIo DIgIraI Audio Broadcasting Playable
SAVING ENERGY £145.9ng
Assam: 0% ENE aqu
(Except rm LLKI (For u Romy)

CHAPTER 1. GENERAL DESCRIPTION
[1] PRECAUTION FOR USING LEAD-FREE
SOLDER
[2] SAFETY PRECAUTION FOR SERVICE
MANUAL ....................................................... 1-2
[3] IMPORTANT SERVICE NOTES (FOR U.K.
ONLY) ........................
[4] SPECIFICATIONS.
[5] NAMES OF PARTS....

CHAPTER 2. ADJUSTMENTS
[1] ADJUSTMENT .....
[2] How to Check the verSIon number of the

System microcomputer...
[3] TEST MODE.

CHAPTER 3. MECHANICAL DESCRIPTION
[1] DISASSEMBLY....

CHAPTER 4. DIAGRAMS
[1] BLOCK DIAGRAM MAIN .....
[2] BLOCK DIAGRAM DISPLAY ..

CHAPTER 5. CIRCUIT DESCRIPTION
[1] WAVEFORMS OF CD CIRCUIT.
[2] VOLTAGE ...................................

CONTENTS

N0. 88560XLDAB9H/

MICRO COMPONENT SYSTEM

MODEL XL-DABQH

XL-DABSH Micro Component System consisting of
XL-DABQH (main unit) and CP-DAB9H (speaker system).

- In the interests of user-safety the set Should be restored to its origi-
nal condition and only parts identical to those specified be used.

CHAPTER 6. CIRCUIT SCHEMATICS AND PARTS
LAYOUT
[1] NOTES ON SCHEMATIC DIAGRAM
[2] TYPES OF TRANSISTOR AND LED
[3] SCHEMATIC DIAGRAM MA|N(1/3)...
[4] SCHEMATIC DIAGRAM MA|N(2/3)...
[5] SCHEMATIC DIAGRAM MA|N(3/3)
[6] SCHEMATIC DIAGRAM DISPLAY.
[7] WIRING SIDE OF PWB
[8] WIRING SIDE OF PWB MAIN TOP .....
[9] WIRING SIDE OF PWB MAIN BOTTOM.
[10] WIRING SIDE OF PWB POWER/JACK ...... 6-16
[11] WIRING SIDE OF PWB DISPLAY/

SWITCH ...................................................... 6-18

CHAPTER 7. FLOWCHART
[1] TROUBLESHOOTING .................................. 7-1

CHAPTER 8. OTHERS
[1] FUNCTION TABLE OF IC
[2] FL DISPLAY ..

...... 8-1
...8-10

Parts Guide

/

This document has been published to be used for

SHARP CORPORATION aftersalesserviceonly.

The contents are subject to Change without notice.

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XL-DABQH
CHAPTER 1. GENERAL DESCRIPTION

[1] PRECAUTION FOR USING LEAD-FREE SOLDER

1. Employing lead-free solder

"MAIN,JACK,SENSOR,SWITCH,DISPLAY,POWER PWB" of this model employs lead-free solder.
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.

IEa

S n-Ag-CU 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.

Example:

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 ofthe 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-A DCEKKV5968J03 MA|N(A1)/DISPLAY(A2)/POWER(A3)SENSOR(A4) [Exceput for U.K.]
PWB-A DCEKKV597SJ03 MA|N(A1)/DISPLAY(A2)/POWER(A3)SENSOR(A4) [For U.K.]
PWB-B DCEKSVSBGSJOB SWITCH(B1) lJACK(BZ)/[Exceput for U.K.]
pWB.B DCEKSV597SJ03 SWITCH(Bt)/JACK(BZ) [For U.K.]