Sharp cd mpx 880 h service manual

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Page 1

CD-MPX880H

SHARP SERVICE MANUAL

No. S4817CDM88OHH

MINI COMPONENT SYSTEM

MODEL CD-MPX880H

[ For Europe, U.K., Australia and New Zealand ]

CD-MPXBBOH Mini Component System consisting of
CD-MPX880H (main unit) and CP-MPX880H (speaker
system).

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

. Windows .
ﬂag @R-D-s UM Media Note for users in U.K.

Recording and playback of any material may require

l r consent which SHARP is unable to give. Please refer
SAVING ENERGY ENE II with particularly to the provisions of Copyright Act 1956, the
S'ttéttiisrot 0.6w NAVIGATION Performers Protection Acts 1963 and 1972 and
cn-H/RW/ 57 D I S C subsequent statutory enactments and orders.
Playable
CONTENTS \
PRECAUTIONS FOR USING LEAD-FREE SOLDER CHAPTER 5. CIRCUIT DESCRIPTION
CHAPTER 1. GENERAL DESCRIPTION [1] Waveforms Of CD Circuit ...... ....5-1
[1] Safety Precaution For Service Manual .......... 1-1 [2] Voltage ................................... ....5-2
[2] Important Service Notes (for U.K. only) ........ 1-2
[3] Specifications ....... -2 CHAPTER 6. CIRCUIT SCHEMATICS AND PARTS
[4] Name Of Parts ..... -3 LAYOUT
[1] Notes On Schematic Diagram ...... ....6-1
CHAPTER 2. ADJUSTMENTS [2] Types Of Transistor And LED ....... ....6»1
[1] Mechanism Section... [3] Schematic Diagram .................. ....6»2
[2] Test Mode ...... [4] Charts Of Connecting Wires.. ..6-22
[3] CD Section [5] Wiring Side Of PWB ...................... 6-24
CHAPTER 3. MECHANISM BLOCKS CHAPTER 7. FLOWCHART
[1] Caution On Disassembly ............................... 3-1 [1] Troubleshooting ............................................. 7»1
[2] Removing And Reinstalling The Main Parts ..... 3-4
CHAPTER 8. OTHERS
CHAPTER 4. DIAGRAMS [1] Function Table Of |C.... ....8-1
[1] Main Block Diagrams ..... [2] FL Display .................... ....8-8
[2] CD Block Diagrams... [3] Wiring Of Primary Supply Leads
(for U.K. only) ................................................ 8-9
PARTS GUIDE

\ /

Parts marked with HA 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.

This document has been published to be used
8 IIAR P CO R PO RATIO N for after sales service only.

The contents are subject to change without notice.

Page 1

CD-MPX880H

SHARP SERVICE MANUAL

No. S4817CDM88OHH

MINI COMPONENT SYSTEM

MODEL CD-MPX880H

[ For Europe, U.K., Australia and New Zealand ]

CD-MPXBBOH Mini Component System consisting of
CD-MPX880H (main unit) and CP-MPX880H (speaker
system).

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

. Windows .
ﬂag @R-D-s UM Media Note for users in U.K.

Recording and playback of any material may require

\ /

Parts marked with HA 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.

This document has been published to be used
8 IIAR P CO R PO RATIO N for after sales service only.

The contents are subject to change without notice.

Page 2

CD-MPXBBOH
PRECAUTIONS FOR USING LEAD-FREE SOLDER

1. Employing lead-free solder
MAIN, POWER, DISPLAY, AUDIO IN, CD 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.

Example: E a

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.

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 of for the maximum heatresistance 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-A 92LPWB7269MANS MAIN (A1), POWER (A2)

PWB-B 92LPWB7269DPLS DISPLAY (B1), AUDIO IN (BZ)

PWB-C 92LPWB67OOCDUS CD