Sharp CDMPX-880-H Service manual

CD-MPX880H

SERVICE MANUAL

No. S4817CDM880HH

MINI COMPONENT SYSTEM

CONTENTS

PRECAUTIONS FOR USING LEAD-FREE SOLDER
CHAPTER 1. GENERAL DESCRIPTION

[1] Safety Precaution For Service Manual........... 1-1

[2] Important Service Notes (for U.K. only) ......... 1-2

[3] Specifications.................................................1-2

[4] Name Of Parts ...............................................1-3

CHAPTER 2. ADJUSTMENTS

[1] Mechanism Section........................................ 2-1

[2] Test Mode.......................................................2-2

[3] CD Section.....................................................2-4

MODEL

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

CD-MPX880H Mini Component System consisting of
CD-MPX880H
system).

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

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.

CHAPTER 5. CIRCUIT DESCRIPTION

[1] Waveforms Of CD Circuit ..............................5-1

[2] Voltage...........................................................5-2

CHAPTER 6. CIRCUIT SCHEMATICS AND PARTS
LAYOUT

[1] Notes On Schematic Diagram.......................6-1

[2] Types Of Transistor And LED........................6-1

[3] Schematic Diagram.......................................6-2

[4] Charts Of Connecting Wires........................6-22

[5] Wiring Side Of PWB....................................6-24

CD-MPX880H

(main unit) and CP-MPX880H (speaker

CHAPTER 3. MECHANISM BLOCKS

[1] Caution On Disassembly................................ 3-1

Removing And Reinstalling The Main Parts

[2]

CHAPTER 4. DIAGRAMS

[1] Main Block Diagrams..................................... 4-1

[2] CD Block Diagrams.......................................4-3

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.

..... 3-4

SHARP CORPORATION

CHAPTER 7. FLOWCHART

[1] Troubleshooting.............................................7-1

CHAPTER 8. OTHERS

[1] Function Table Of IC......................................8-1

[2] FL Display......................................................8-8

[3] Wiring Of Primary Supply Leads

(for U.K. only) ................................................8-9

PARTS GUIDE

This document has been published to be used
for after sales service only.
The contents are subject to change without notice.

CD-MPX880H

AudioXL-MP150Service ManualXLMP150MarketE

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:

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 heat-resistance temperature
of parts may be exceeded, remove the bit from the PWB as soon as you confirm the steady solder ing 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.

PWB-A 92LPWB7269MANS MAIN (A1), POWER (A2)
PWB-B 92LPWB7269DPLS DISPLAY (B1), AUDIO IN (B2)
PWB-C 92LPWB6700CDUS CD

Parts No.

Description

– i –

CD-MPX880H

CHAPTER 1: GENERAL DESCRIPTION

[1]

Safety Precaution For Service Manual

WARNINGS

THE AEL (ACCESSIBLE EMISSION LEVEL) OF LASER POWER OUTPUT FOR THIS MODEL IS SPECIFIED TO
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.

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.

This product is classified as a CLASS 1 LASER PRODUCT.

[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 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.

FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL.

WITHSTANDING

VOLTAGE TESTER

AC

OUT

SHORT-CIRCUIT
AC POWER
SUPPLY CORD

PROBE

UNIT

CONNECT THE PROBE
TO GND OF CHASSIS
SCREW

1 – 1

–2

CD-MPX880H

[3]

Specifications

CD-MPX880H

General

Power source AC 220 - 240 V ~ 50 Hz
Power consumption

Dimensions Width: 260 mm (10 - 1/4" )

Weight 7.4 kg (16.31 lbs.)

(*) This power consumption value is obtained when the

demonstration mode is cancelled in the power stand-by mode.

Power on: 82 W
Power stand-by: 0.6 W (*)

Height: 332 mm (13" )
Depth: 324 mm (12 - 7/8")

Amplifier

Output power PMPO: 880 W

Output terminals Front Speakers: 6 ohms

Input terminals Audio In (audio signal):

MPO: 440 W (220 W + 220 W) (10 % T.H.D.)
RMS: 280 W (140 W + 140 W) (10 % T.H.D.)
RMS: 200 W (100 W + 100 W) (1 % T.H.D.)

Headphones: 16 - 50 ohms
(recommended: 32 ohms)

250 mV/ 47 k ohms

Tuner

Frequency range FM: 87.5 - 108.0 MHz

AM: 522 - 1,620 kHz

CD player

Type 5-disc multi-play compact disc player
Signal readout Non-contact, 3-beam semiconductor laser

D/A converter 1-bit D/A converter
Frequency

response
Dynamic range 90 dB (1 kHz)

pickup

20 - 20,000 Hz

Cassette deck

Frequency
response

Signal/noise ratio 55 dB (TAPE 1, playback)

Wow and flutter 0.35 % (DIN 45 511)

50 - 14,000 Hz (normal tape)

50 dB (TAPE 2, recording/playback)

Speaker

Type 2-way type speaker system

5 cm (2") tweeter
16 cm (6-5/16") woofer

Maximum input
power

Rated input power 140 W
Impedance 6 ohms
Dimensions Width: 200 mm (7-7/8")

Weight 3.18 kg (7.0 lbs.)/each

280 W

Height: 330 mm (13")
Depth: 220.5 mm (8 - 11/16")

CD-MPX880H for U.K., Australia and New Zealand

General

Power source AC 220 - 240V ~ 50Hz
Power consumption

Dimensions Width: 260 mm (10 - 1/4" )

Weight 7.4 kg (16.31 lbs.)

(*) This power consumption value is obtained when the

demonstration mode is cancelled in the power stand-by mode.

Power on: 82 W
Power stand-by: 0.6 W (*)

Height: 332 mm (13" )
Depth: 324 mm (12 - 7/8")

Amplifier

Output power RMS: 280 W (140 W + 140 W) (10% T.H.D.)

Output terminals Front Spe akers: 6 ohms

Input terminals Audio In (audio signal):

RMS: 200 W (100 W + 100 W) (0.9% T.H.D.)

Headphones: 16 - 50 ohms
(recommended: 32 ohms)

250 mV/ 47 k ohms

Tuner

Frequency range FM: 87.5 - 108.0 MHz

AM: 522 - 1,620 kHz

CD player

Type 5-disc multi-play compact disc player
Signal readout Non-contact, 3-beam semiconductor laser

D/A converter 1-bit D/A converter
Frequency

response
Dynamic range 90 dB (1 kHz)

pickup

20 - 20,000 Hz

Cassette deck

Frequency
response

Signal/noise ratio 55 dB (TAPE 1, playback)

Wow and flutter 0.3% (WRMS)

50 - 14,000 Hz (normal tape)

50 dB (TAPE 2, recording/playback)

Speaker

Type 2-way type speaker system

5 cm (2") tweeter
16 cm (6-5/16") woofer

Maximum input
power

Rated input power 140 W
Impedance 6 ohms
Dimensions Width: 200 mm (7-7/8")

Weight 3.18 kg (7.0 lbs.)/each

280 W

Height: 330 mm (13")
Depth: 220.5 mm (8 - 11/16")

1 – 2

– 4

[4] Names Of Parts

5

1

2

3
4
5

6
7
8

9
10
11

12
13

4

3

2

1

TIMER

CD

PLAYBACK

AUDIO

PHONES

CD-MPX880H

Front panel

1. Disc Trays

2. Timer Indicator

3. On/Stand-by Button

14

4. CD Button

5. Tape (1 2) Button

6. Tuner (Band) Button

15

7.Audio In Button

16

5

4

3

2

1

(PLAY & STOP)

IN

RECORD/PLAYBACK

17

8. CD or Tape Stop Button

9. CD Track Down or Fast Reverse, Tape 2 Rewind,

18

Tuner Preset Down, Time Down Button

19

10. Tuning Down Button

20

11. Tape 1 Cassette Compartment

12. Headphone Socket

13. Audio In Socket

21

14. Remote Sensor

15. Volume Control

16. CD Play or Repeat, Tape Play Button

17. Disc Tray Open/Close Button

18. Disc Number Select Buttons

19. CD Track Up or Fast Forward, Tape 2 Fast Forward,
Tuner Preset Up, Time Up Button

20. Tuning Up Button

21. Tape 2 Cassette Compartment

12 3 45678 910111213

20 21

22

23

14

151617

18

19

3
4
5

1

AC INPUT

6

2

Display

1. Disc Number Indicators

2. MP3/WMA Folder Indicator

3. MP3/WMA Title Indicators

4. MP3 Indicator

5. WMA Indicator

6. RDS Indicator

7. Traffic Announcement Indicator

8. Dynamic PTY Indicator

9. Traffic Programme Indicator

10. Sleep Indicator

11. Timer Play Indicator

12. Timer Recording Indicator

13. Tape 2 Record Indicator

14. MP3/WMA Total Indicator

15. Daily Timer Indicator

16. FM Stereo Mode Indicator

17. FM Stereo Receiving Indicator

18. Tape Play Indicator

19. Memory Indicator

20. Extra Bass Indicator

21. Disc Repeat Play Indicator

22. Disc Pause Indicator

23. Disc Play Indicator

Rear panel

1. Cooling Fan

2. AC Power Lead

3. FM 75 Ohms Aerial Socket

4. AM Aerial Earth Terminal

5. AM Loop Aerial Terminal

6. Front Speaker Terminals

1

3

Speaker system

1. Tweeter

2. Woofer

3. Bass Reflex Duct

2

4. Speaker Wire

4

1 – 3

–2

CD-MPX880H

1

13
14

8

15

9
10

2

A O

IDU

NI

11
12

3

4

16

22

24

25

26 27 28 29

17
18

19
20
21

23

5
6

7

30 31 32

Remote control

1. Remote Control Transmitter

2. Disc Number Select Buttons

3. Clock/Timer Button

4. Character Input/Disc Direct Search Buttons

5. Equaliser Mode Select Button

6. Extra Bass/Demo Button

7. Volume Up and Down Buttons

8. ON/STAND-BY Button

9. CD Button

10. Tuner (Band) Button

11. Tape (1 2) Button

12. AUDIO IN Button

13. Disc Clear/Dimmer Button

14. Disc Random Button

15. Disc Stop Button

16. Tape Stop Button

17. Memory Button

18. Disc Pause Button

19. Disc Play or Repeat Button

20. Tape Play Button

21. Tape 2 Record Pause Button

22. Tuning Up, Cursor Up Button

23. Disc Track Up or Fast Forward, Tape 2 Fast Forward,
Tuner Preset Up, Time Up, Cursor Right Button

24. Disc Track Down or Fast Reverse, Tape 2 Rewind,
Tuner Preset Down, Time Down, Cursor Left Button

25. Tuning Down, Cursor Down Button

26. MP3/WMA Navigation Mode Select Button

27. Character Button

28. MP3/WMA Display Button

29. Enter Button

30. RDS ASPM Button

31. RDS PTY Button

32. RDS Display Button

1 – 4

– 4

CD-ES700/CD-ES77CD-ES700/CD-ES77Service ManualCD-ES700/CD-ES77MarketE

CHAPTER 2. ADJUSTMENTS

[1] Mechanism Section

• Driving Force Check

Torque Meter Specified Value

Play: TW-2111 Tape 1: Over 75 g

Tape 2: Over 75 g

• Torque Check

Torque Meter Specified Value

Tape 1 Tape 2
Play: TW-2111 25 to 85 g.cm 25 to 85 g.cm
FF/REW — 45 to 195 g.cm
BACK TENSION 1.2 to 7.0 g.cm 1.2 to 7.0 g.cm

• Tape Speed

CD-MPX880H

Test Tape Adjusting

Normal
speed

MTT-111 Variable

Tape
Motor

Figure 1

Point

Resistor in
motor.

TAPE MECHANISM

Specified

Value

3,000 ± 90 Hz
Speaker

Variable Resistor in motor

Instrument

Connection

Speaker
T erminal (Load
resistance:
6 ohms)

2 – 1

CD-MPX880H

[2] Test Mode

• Setting the test mode

During stand-by mode, press button while pressing
down the button and ON/STAND-BY button.

then, press the CD button to enter the test mode.

C D T E S T

OPEN/CLOSE operation is using manual. IL isn’t done

<< >>,<< >>buttons make pick's slide possible.

to page 2-3

<<PLAY>> key input.

Do TOC IL. Do normal play.
When these following key is input into PLAY key, track
number can be appoint directly.

<< 1>> key: Track 4
<< 2>> key: Track 9

<< 3>> key: Track 15

A

IL isn’t done

IL isn’t done

<<MEMORY>> key input.

Adjustment result automatically will
display as below for each 2 sec:
a) "FOF_XXXX"
b) "TOF_XXXX"
c) "TBAL_XX"
d) "TGAN_XX"
f) "FGAN_XX"
g) "RFLS_XX"

<<STOP>> key input.

STOP

Explanation:
a) Focus off set = "FOF_XXXX"
b) Tracking off set = "TOF_XXXX"
c) Tracking balance = "TBAL_XX"
d) Tracking Gain = "TGAN_XX"
f) Focus Gain = "FGAN_XX"
g) RF level shift = "RFLS_XX"
VOL — Last memory
P.GEQ — FLAT
X-BASS — OFF
To cancel: Power OFF

2 – 2

A

<<MEMORY>> key input.

Laser ON.

<<MEMORY>> key input.

Tracking OFF play at that specific point.

<<MEMORY>> key input.

Tracking ON play from that specific point.

CD-MPX880H

<<MEMORY>> key input.

Adjustment result automatically will display as below for each 2 sec :
a) "FOF_XXXX"
b) "TOF_XXXX"
c) "TBAL_XX"
d) "TGAN_XX"
f) "FGAN_XX"
g) "RFLS_XX"

<<STOP>> key input.

STOP

Sliding the PICKUP with << >>, << >> button
must only be in STOP mode.

Explanation:
a) Focus off set = "FOF_XXXX"
b) Tracking off set = "TOF_XXXX"
c) Tracking balance = "TBAL_XX"
d) Tracking Gain = "TGAN_XX"
f) Focus Gain = "FGAN_XX"
g) RF level shift = "RFLS_XX"
VOL — Last memory
P.GEQ — FLAT
X-BASS — OFF
To cancel: Power OFF

2 – 3

CD-MPX880H

[3] CD Section
CD Error code description

Error Explanation

10* CAM error. Can't detect CAM switch when CAM is moving.
11* When it detect cam operation error during initialize process.
20* TRAY error . Can't detect TRAY switch when TRAY is moving.
21* When it detect TRAY operation error during initialize process.

31 When it change to CD function, DSP cannot read initial data.

* 'CHECKING'

If Error is detected, 'CHECKING' will be displayed instead of 'ER-CD**'. 'ER-CD**' display will only be displayed

th

when error had been detected for the 5

Standard Specification of Stereo System Error Message Display Content s

Error Contents Display Notes

CD CD Changer Mechanism Error. 'ER-CD**' (*) 10: CAM SW Detection NG during normal operation

CD DSP Communication Error. 'ER-CD31' DSP COMMUNICATION ERROR.
Focus Not Match/IL Time Over. 'NO DISC'

TUNER PLL Unlock. PLL Unlock.

(*) CHECKING:

If CD changer mechanism error is detected, 'CHECKING' will be display instead of 'ER-CD**'. 'ER-CD**' display will
only be display when error had been detected for the 5

Speaker abnormal detection and +B PROTECTION display

times.

FM 87.5 MHz

11: CAM SW Detection NG during initialize process
20: TRAY SW Detection NG during normal operation
21: TRAY SW Detection NG during initialize process

th

times.

In case speaker abnormal detection or +B PROTECTION had occurred, the unit will automatically enter to stand - by
mode and Timer indicator will be flashing as below.

Example : In case of speaker abnormal

FLASHING

OFF

NO. 2

(REPEAT)

TIMER
LED

ON

OFF

NO. 1

NO.1 : +B Protection
NO.2 : Speaker abnormal

OFF

FLASHING

NO. 2

1 FRAME

OFF

ON

NO. 1

+B PROTECTION is condition when irregular process occur on power supply line.
BEFORE TRANSPORTING THE UNIT
The following process need to be taken after set tapering/parts replacement.

1. Press the ON/STAND-BY button to enter stand-by mode.

2. While pressing down the button and the button, press the ON/STAND-BY button. The Micro Computer
version number will be displayed as "CM*****".

3. Press button until "WAIT"→ "FINISHED" appears.

4. Unplug the AC cord and the unit is ready for transporting.

2 – 4

CD-MPX880H

CD-ES700/CD-ES77CD-ES700/CD-ES77Service ManualCD-ES700/CD-ES77MarketE

CHAPTER 3. MECHANISM BLOCKS

[1] Caution On Disassembly

Follow the below-mentioned notes when disassembling the unit and reassembling it, to keep it safe and ensure
excellent performance:

1. Take cassette tape and compact disc out of the unit.

2. Be sure to remove the power supply plug from the wall outlet before starting to disassemble the unit.

3. Take off nylon bands or wire holders where the y need to b e r emove d whe n disassembling th e u nit. After servicing
the unit, be sure to rearrange the leads where they were before disassembling.

STEP

1
2

3

4

5

6

7
8

9

10

11
12

13

14

CD Mechanism

REMOVAL
Top Cabinet
Side Panel (Left/

Right)
CD Changer Unit

Rear Panel with
Fan Motor

Front Panel

Main PWB

Power PWB
Tape Mechanism

Game Input PWB
Display PWB

Re-Flash PWB
CD Servo PWB

Changer
Mechanism Unit

PROCEDURE

1. Screw…………..………(A1) X 5

2. Screw……….………….(B1) X 8

1. Hook …………………...(C1) X 2

2. Socket……………….....(C2) X 1

3. Flat Cable ………..……(C3) X 1

1. Screw………….…….....(D1) X 9

1. Screw………………..…(E1) X 3

2. Flat Cable ………..……(E2) X 1

3. Socket……..….............(E3) X 1

4. Hook ……………..........(E4) X 2

1. Screw………………..…(F1) X 3

2. Socket……..…………...(F2) X 4

3. Flat Cable ………..…....(F3) X 1

1. Screw………………......(G1) X 4

1. Screw…….………….....(H1) X 6

2. Flat Cable ………..……(H2) X 1

1. Screw………………..…(J1) X 2

1. Knob……..…………..…(K1) X 1

2. Nut……………..…….....(K2) X 1

3. Washer……..….…........(K3) X 1

4. Screw……..……...........(K4) X 6

1. Screw………….............(L1) X 1

1. Screw...........................(M1) X 2

2. Flat Cable ....................(M2) X 2

3. Socket……...................(M3) X 1

1. Screw…........................(N1) X 4

2. Changer Chassis..........(N2) X 1

1. Screw…........................(P1) X 4

FIGURE

1
1

2

2

2,3

2
2
3

2,3

3
3

3
4

5
5

6
7

8

9

CD Changer
Unit

Rear Panel

(D1)x9
3x10mm

O

Figure 2

CD Servo PWB

PULL

Hook

(C1)x1

Power PWB

Fan Motor

(F2)x1

(E3)x1

(C3)x1

(F2)x2

(C2)x1

Main PWB

(F1)x1
3x10mm

O

Front Panel

(E2)x1

PULL

Lug wire

(E1)x1
3x10mm

O

Hook
(C1)x1

Note:

After removing the connector for the optical pickup from the connector,
wrap the conductive aluminium foil around the front end of the connector
so as to protect the optical pickup from electrostatic damage.

(A1)x2
3x12mm

(B1)x2
3x10mm

(A1)x1

3x12mm

Figure 1

Side Panel

(Right)

(B1)x2
3x10mm

Top Cabinet

Rear Panel

(B1)x2
3x10mm

(B1)x2
3x10mm

Front Panel

Side Panel

(Left)

(A1)x2

3x12mm

Power PWB

Figure 3

(E4)x1

PULL

(G1)x4

4x8mm

(F2)x1

(F3)x1

(F1)x2
3x6mm

O

(E1)x2
3x8mm

O

Front Panel

PULL

Hook
(E4)x1

3 – 1

CD-MPX880H

O

O

(H1)x6

O

Tap e

Mechanism

3x10mm

Figure 4

(H2)x1

Lug wire

Front Panel

(N1)x4

3x10mm

(N2)x1

Front Panel

(K4)x6

2.6x10mm

Figure 5

(J1)x2
Special

Display PWB

Nut (K2)x1

(K1)x1

Washer
(K3)x1

Game Input
PWB

(P1)x4

2.6x10mm

CD Mechanism

Figure 8

Changer
Mechanism
Unit

Changer
Mechanism
Unit

Figure 9

Figure 6

(M2)x1

Main Chasis

(M1)x2

3x10mm

(M3)x1

(L1) X 1

3X10mm

Re-Flash PWB

(M2)x1

Figure 7

CD Servo
PWB

Changer
Mechanism
Unit

3 – 2

CD-MPX880H

STEP PROCEDURE FIGURE

1 1. Front Panel………….…..(A1) X 1 10

Woofer

REMOVAL

1. Screw…….…….…….….(A2) X 4

2 Tweeter 1. Screw…….……….....….(B1) X 2 10

Speaker Box

Tweeter

(B1) x 2

M3 x 10mm

Front Panel

(A1) x 1

Figure 10

(A2) x 4

M4 x 16mm

Woofer

Screwdriver

SPEAKER UNIT

LOCKING TAB

LOCKING TAB

CAUTION:

TO REMOVE SPEAKER UNIT, PRESS THESE LOCKING TABS
TO RELEASE SPEAKER WIRES.

SPEAKER WIRE

3 – 3

CD-MPX880H

[2] Removing And Reinstalling The Main Parts

1. TAPE MECHANISM SECTION

Perform steps 1 to 3 and 4 of the disassembly method
to remove the tape mechanism.

1.1. How to remove the record/playback and erase
heads (TAPE 2) (See Fig. 1)

1. When you remove the screws (A1) x 2 pcs., the
recording/playback head and three-dimensional
head of the erasing head can be removed.

TAPE 2

Clutch Ass'y

Record/Playback
Head

Pinch

Pinch Roller
(C1)x1

Pull

<B>

<A>

Roller
Pawl

Figure 3

1.4. How to remove the belt (TAPE 2) (See Fig. 4)

1. Remove the main belt (D1) x 1 pc., from the motor
side.

2. Remove the FF/REW belt (D2) x 1 pc.

Erase Head

(A1)x2
2x9mm

Figure 1

1.2. How to remove the playback head (TAPE 1)(See Fig. 2)

1. When you remove the screws (B1) x 2 pcs., the
playback head can be removed.

TAPE 1

Clutch Ass'y

Playback
Head

1.5. How to remove the belt (TAPE 1) (See Fig. 4)

1. Remove the main belt (E1) x 1 pc., from the motor
side.

2. Remove the FF/REW belt (E2) x 1 pc.

Tap e
Motor

TAPE 2
Main Belt
(D1)x1

TAPE 1
Main Belt
(E1)x1

TAPE 1

FF/REW
Belt
(E2)x1

TAPE 2

FF/REW
Belt
(D2)x1

Main Belt
(D1)x1

Main Belt
(E1)x1

Tap e

Motor

Figure 4

1.6. How to remove the motor (See Fig. 5)

1. Remove the screws (F1) x 2 pcs., to remove the motor.

Tap e
Motor

(B1)x2
2x9mm

Figure 2

1.3. How to remove the pinch roller (TAPE 1/2) (See Fig. 3)

1. Carefully bend the pinch roller pawl in the direction
of the arrow <A>, and remove the pinch roller (C1) x
1 pc., in the direction of the arrow <B>.

Note:

When installing the pinch roller, pay attention to the
spring mounting position.

(F1)x2

2.6x5mm

Figure 5

3 – 4

Clutch Ass'y

2. CHANGER MECHANISM SECTION

Perform steps 1, 2, 7 and 8 of the disassembly method
to remove the CD changer mechanism.

2.1 How to remove CD Disc (See Fig. 1-4)

1. When CD is at play position (Figure 1), rotate
reduction gear C clock-wise as shown in Figure 2
until disc tray is at stock position, then rotate further
to eject the disc tray so that CD can be removed

from the tray.

CD-MPX880H

Reduction gear D

Up Down

Figure 3

Guide Tray

CD Disc

Disc Tray

Reduction gear C

CD Disc

CD at play position.

CD at stock position.

Figure 1

Gear up down board

Mark 1

(DISC 1)

Figure 4

(DISC 3)

Mark 2

(DISC 2)

Mark 3

(DISC 4)

Mark 4

Mark 5

(DISC 5)

2.2 How to remove the tray motor/main cam motor/
5-Changer Motor PWB (See Fig. 5)

1. Remove the screws (A1)x 2 pcs., to remove tray
motor/main cam motor/5-Changer Motow PWB.

Changer Mechanism Unit

Front Rear

Figure 2

2. In another case, if CD mechanism is at tray No.1
play position and to remove CD located in tray No.3,
the procedure is as follows:

If the gear up down board is located at tray No.1
position, then rotate gear clock-wise until it is at
stock postiiton. Rotate reduction gear D clockwise
(Figure 3) to move the CD mechanism to tray No.3
position. This is confirmed by checking the gear up
down board position by the marking as indicated on
the main chassis as shown in Figure 4.

3 – 5

Main Cam Motor

(A1)x2
φ2x10mm

Figure 5

Tray Motor

5-Changer
Motor PWB

Note:

There are 2 more screws tighten the motors at the
bottom of main chassis. Before performing prodcedure
1 above, disc stop spring, top plate sear up down
board and trays must be removed, then only the 2
screws can be untighten.

CD-MPX880H

5

CHAPTER 4. DIAGRAMS

[1] Main Block Diagrams

1
2
3
4
5
6
7
8
9

10

CNP303

(15 PINS)

1

3
4

POP REDUCE
L REC.
R REC.

SWITCHING

Q105
Q106

Q111

L103

BIAS
OSC

11
12
13
14
15

JKA701 (AUDIO IN)

L(T1)

1

24

R(T1)
L(T2)

2

23

R(T2)

6

T1/T2
REC

9

16
11

12

NOR/

15

HIGH

Q114

SWITCHING

+B4

Q112

SWITCHING

CNS603

P.B.

H/N

T1/T2

19

Q113

SWITCHING

+B3

+B3

SOLENOID

FROM CD SECTION

HEAD

L-CH
R-CH

L-CH

R-CH

TAPE 1

P.B. HEAD

TAPE 2

REC./P.B.

MOTOR

DRIVER

Q709~
Q712

Q703~
Q708

DRIVER

CNP2

AC BIAS

ERASE

HEAD

P.B.

REC.

Q609

TAPE

MECHANISM

ASS'Y

BI601CNS601

1

2

3

SWITCHING
Q101~
Q104

L

R
CNP603

13

L

4

21

R

L

7

18

R

10

ALC

+B4

Q109

TUNER
PACK
UNIT
RTUNSA008AWZZ

9

L

16

R

L

10

TAPE

15

R

L

TUNER

+B4

P.B.

REC.

11
14

AUDIO PROCESSOR

R

L

CD

12
13

R

IC101
AN7345K
PLA YBACK AND RECORD/
PLA YBACK AMP.

Q110
BIAS

23

IC601

LC75341

18

3

7

Q107
Q108

MUTING

+B4

1

DI

2

CE

24

CLK

-20dB
ATT

R

21

4

L

MICROCOMPUTER

REC/PLAY

JOG701

VOLUME

5

IC701

IXA180AW

SYSTEM

(2/2)

56

Q607

T1/T2

BIAS

MUTE

SYSTEM

VF1

UN
SW_

+B8

-VF

Figure 4-1: MAIN BLOCK DIAGRAM (1/2)

4 – 1

FL701

FL DISPLAY

812 45

26

25

~

CD-MPX880H

+B8

5150

TAPE

MECHANISM

ASS'Y

47

~

+B8

MUTE

SYSTEM

SP DET.

D901~D906

IC901

STK412-410

POWER AMP.

18

L

14

R

7

1

5

2

6

-B1

26 494846 47 3837 394055

57

~

78
80

VLOAD

79

VDD

IXA180AW

MICROCOMPUTER

AVDD

154515253

L-OUT
R-OUT

1011

RESET

Q712

Q901~Q904,
Q906~Q909

11

+B1

81

~

98
99

100

+B8

8

18

VDD

IC701

SYSTEM

(1/2)

RESET

16 1742 1312 20 23 28 29 30 31

XL701

8.388 MHz

+B8

SP RELAY

ON-OFF

D801

~

15 14

AVDD

CLK

CEDIDO

FAN MOTOR

Q905

RL914

27

+B8

41

2

~
4

25
36

DRIVER

RX701

REMOTE

1

SENSOR

3

KEY
SW701-SW706
SW707-SW717

Q906

+B3

HEADPHONES

MAIN POWER

TRANSFORMER

2

TO CD

SECTION

+B5

M901

M

FAN

MOTOR

SO901
SPEAKER
TERMINAL

JKA702

PT801

+B8

VF1

UN
SW_5.6V

+B8

-B2

+B2

VF2

-VF

AC_RLY

IC854

31

KIA78L05

VOLTAGE

REGULATOR

RELAY

DRIVER

Q841

F802

T4A L250V

D802

F801

T4A L250V

D803,
D804

Q801

D842~
D845

F804

T2A L250V

F803

T2A L250V

VOLTAGE

REGULATOR

TRANSFORMER

Figure 4-2: MAIN BLOCK DIAGRAM (2/2)

T.F.

PT841

SUB POWER

D846

F805

T2A L250V

RL841

C844

AC POWER
SUPPLY CORD
AC 220-240V ~ 50Hz

4 – 2

CD-MPX880H

[2] CD Block Diagrams

XL1

16.9344 MHz

+3.3V

CONSTANT

VOLTAGE

TO MAIN SECTION

R-CH

AGND

L-CH

CE

43

CL

44

DI

45

DO

46

RESB

47

INTB0

48

INTB1

49

DVDD 1.8

38

DVDD 1.8

66

XOUT

72

XIN

73

DVDD

AVDD

36 41

+3.3V

D_+5V(+B5)

DGND

7875

LCHO

RCHO

DVDD

DVDD

MGND

+7.5V

7 1 2 3 4 5 6

CNP3

LC78690E

CD SERVO

XVDD

74

TO DISPLAY SECTION

SW3 TRAY SW2

SW2 TRAY SW1

SW1 CLAMP

SW4 DISC

MP3_INT11CD_INT12TRAY SW1/SW2

13

77
71
67
57
56
55
54
53
42
40

37
26
20

32

24
25
22
23

DISC/CLAMP

143 1 9 8 7 6 52 4

+5V

GND

PHOTO

MO_A-

CD_RES

MO_A+

CD_DI

CD_DO

CD_CLK

CD_CE

10

5251

CONT1

CONT0

IC1

PUIN

SLDO
SPDO

FDO
TDO

LDD

EIN

LDS

FIN

18 1968

1413

DIN

BIN

CIN

AIN

LRVDD

76 876521

CNP7

GND

VIN1

VIN2

17151311

VIN3

VIN4

LA6261

FOCUS/TRACKING/

PVCC1
SVCC

PVCC2
VCONT6
VCONT5

SPIN/SLIDE

DRIVER

Q1

+3.3V

LASER

DRIVER

+7.5V

9

27
28
24
21

PHOTO

RX1

22

23

REV6

IC2

M1

5V

M

+

--

FWD6

3363521

4

M2

TRAY MOTOR

M

+

10 113 1 9 8 7 6 52 4

32 3331 34

VO6-

VO6+

FWD5

REV5

REG IN

REG OUT

56

MOTOR

MAIN CAM

CNP4

VO5-

VO5+

19
20

30

7

26

8

10

Q2

+3.3V

COIL

TRACKING

PICKUP UNIT

FOCUS COIL

NM1

SPINDLE

MOTOR

NM2

SLED

MOTOR

M
M

NSW 1

PICKUP

IN

Q3

Figure 4-3: CD BLOCK DIAGRAM

4 – 3

CHAPTER 5. CIRCUIT DESCRIPTION

[1] Waveforms Of CD Circuit

CD-MPX880H

1

IC1

22

FDO

1

IC1

2

IC1 IC1

1

IC1 IC1

23

22

TDO

FDO

5

6

7

IC1

3

IC1

16

TE

1

IC1

22

25

28

27

22

FDO

SPDO

PDOUT 0

PDOUT 1

FDO

IC1

IC1

16

TE

4

2

IC1

2

RFOUT

RFOUT

3

4

5 – 1

CD-MPX880H

1 1.59 21 3.24 41 3.13 61 1.55
2 0.47 22 1.62 42 0.01 62 1.93
3 0.39 23 1.63 43 0.05 63 1.93
4 2.79 24 1.62 44 2.93 64 1.93
5 1.63 25 1.64 45 2.88 65 0.00
6 1.63 26 0.00 46 1.87 66 1.81
7 1.63 27 0.33 47 3.13 67 0.00
8 1.63 28 1.62 48 3.13 68 3.13

9 1.63 29 1.10 49 3.13 69 0.03
10 1.63 30 3.05 50 0.00 70 0.02
11 1.64 31 0.00 51 3.12 71 0.01
12 0.00 32 3.26 52 3.12 72 1.34
13 1.63 33 0.03 53 0.00 73 1.53
14 1.63 34 0.03 54 0.00 74 3.01
15 1.62 35 0.03 55 0.00 75 1.54
16 1.64 36 3.26 56 0.00 76 3.23
17 1.63 37 0.02 57 0.00 77 0.00
18 3.27 38 1.81 58 0.00 78 1.59
19 0.00 39 2.56 59 1.58 79 3.24
20 0.00 40 0.00 60 1.57 80 1.59

IC 1

PIN NOVOLTAGE

(V)

PIN NOVOLTAGE

(V)

PIN NOVOLTAGE

(V)

PIN NOVOLTAGE

(V)

1 3.43 10 3.28 19 4.51 28 7.64

2 3.50 11 1.65 20 4.50 29 7.58

3 3.44 12 1.65 21 3.45 30 0.00

4 3.48 13 1.65 22 3.10 31 0.00

5 3.44 14 1.65 23 3.10 32 0.00

6 3.49 15 1.65 24 3.09 33 0.00

7 0.00 16 1.65 25 1.65 34 0.00

8 4.20 17 1.65 26 0.02 35 3.49

9 7.63 18 1.65 27 7.64 36 3.45

E 3.26 E 4.86 E 1.81 E 0.00

C 0.10 C 3.27 C 3.26 C 3.28

B 3.23 B 4.19 B 2.33 B 0.00

IC 2

Q 1

Q 2

Q 3

Q 4

VOLTAGE

(V)

PIN NOVOLTAGE

(V)

PIN NOVOLTAGE

(V)

PIN NOVOLTAGE

(V)

PIN NOVOLTAGE

(V)

PIN NOVOLTAGE

(V)

PIN NOVOLTAGE

(V)

PIN NOVOLTAGE

(V)

PIN
NO

[2] Voltage

IC701

PIN PIN

VOLTAGE

NO NO

(V) (V)

1 4.94 V

4.94 V

2 52 4.40 V
353

4.92 V

4.92 V

454

1.32 V

555

4.92 V

656

4.92 V

7 57 -29.05 V
8 0.00 V
9 4.87 V

4.87 V

10 60

4.87 V

11 61

0.00 V

12 62

0.00 V

13 63

0.00 V

14 64

0.00 V

15 65

0.00 V

16 66

0.00 V

17 67
18 68

0.00 V

0.00 V

19 69
20 70

0.00 V

0.00 V

21 71
22 4.52 V 72
23 4.41 V 73
24 4.54 V

0.00 V

25 75

0.00 V

26 76
27 1.87 V 77

4.05 V

28 78

4.07 V

29 79

0.00 V

30 80
31 4.66 V 81
32 0.23 V 82
33 4.95 V 83
34 4.95 V 84
35 85

0.00 V

0.00 V

36 86
37 13.15 V

13.15 V

38 88

13.15 V

39 89

0.00 V

40 90
41 -23.60 V 91
42 4.72 V 92
43 4.41 V

4.54 V

44 94
45 0.00 V 95

0.00 V

46 96

0.00 V

47 97

0.00 V

48 98
49 4.54 V 99
50 0.00 V 100

VOLTAGE

51

58
59

74

87

93

0.00 V

4.38 V

0.00 V

4.39 V

4.43 V

-26.42 V

-18.41 V

-29.08 V

-29.08 V

0.00 V

-29.08 V

-0.92 V

-0.96 V

-11.10 V

0.00 V

-23.60 V

-29.00 V

-23.60 V

0.00 V

0.00 V

-23.60 V

-26.20 V

-23.60 V

0.00 V

-26.40 V

0.00 V

-23.60 V

0.00 V

-23.61 V

-20.84 V

-10.43 V

-23.50 V

-26.40 V

-28.93 V

-26.40 V

-21.10 V

-25.12 V

-24.99 V

-23.01 V

-25.00 V

-24.98 V

-25.00 V

-24.85 V

-24.92 V

-24.89 V

-24.82 V

-24.87 V

-24.63 V

IC 601

PIN

VOLTAGE

NO

10
20
30
4 4.98
5 4.95
6 4.96
7 4.99
8 4.96

9 4.96
10 4.99
11 4.96
12 4.96
13
14 4.96
15 4.96
16 4.96
17 4.99
18 4.96
19 4.96
20 4.96
21 4.96
22 4.98
23 9.95
24 0

4.96

IC 901

PIN

VOLTAGE

NO

1 53.7
2 22.7
3 10.7
4 -10.7
5 -22.7
6 -53.7
70
80

90
10 0
11 0
12 -52.2
13 52.4
14 0
15 0
16 -51
17 0
18 0

5 – 2

IC101

PIN

VOLTAGE

(V)(V)(V)

NO

10
20
30
42
52
6 1.32
70
8 0.6

9 3.48
10 3.44
11 0
12 0
13 6.9
14 4.18
15 0
16 3.45
17 0.6
18 0
19 2.59
20 2
21 2
22
23 0
24 0

0

IC 851

PIN

VOLTAGE

(V)

NO

1 5.06
2 12.83
3 19.6
40
5 18.28
6 9.92
7 8.4

CD-MPX880H

CHAPTER 6. CIRCUIT SCHEMATICS AND PARTS LAYOUT

[1] Notes On Schematic Diagram

• Resistor:

To differentiate the units of resistors, such symbol
as K and M are used: the symbol K means 1000
ohm and the symbol M means 1000 kohm and the
resistor without any symbol is ohm-type resistor.
Besides, the one with “Fusible” is a fuse type.

• Capacitor:
To indicate the unit of capacitor, a symbol P is used:
this symbol P means pico-farad and the unit of the
capacitor without such a symbol is micr ofarad. As to
electrolytic capacitor, the expression “capacitance/
withstand voltage” is used.
(CH), (TH), (RH), (UJ): Temperature compensation
(ML): Mylar type
(P.P.): Polypropylene type

• Schematic diagram and Wiring Side of P.W.Board
for this model are subject to change for improve­ment without prior notice.

• The indicated voltage in each section is the one
measured by Digital Multimeter between such a
section and the chassis with no signal given.

1. In the tuner section,
indicates AM
indicates FM stereo

2. In the main section, a tape is being played back.

3. In the deck section, a tape is being played back.
( ) indicates the record state.

4. In the power section, a tape is being played back.

5. In the CD section, the CD is stopped.

• Parts marked with “ “ ( ) are impor-

tant 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.

REF. NO DESCRIPTION POSITION

JOG701 VOLUME MAX—MIN
SW701 POWER ON /STAND-BY ON—OFF
SW702 CD ON—OFF
SW703 TAPE ON—OFF
SW704 TUNER (BAND) ON—OFF
SW705 PLAY ON—OFF
SW706 STOP ON—OFF
SW707 FAST REWIND/PRESET DOWN ON—OFF
SW708 TUNING DOWN ON—OF F

[2] Types Of Transistor And LED

FRONT

VIEW

E C B
(S)(G)(D)
(1)(2)(3)

KTA1271 Y
KTA1273 Y
KTA1274 Y
KIA78L05

KTC3199 GR
KTC3200 GR
KTC3203 Y

B

(3)

E

(1)

KTA1504 GR
KRA107 S
KRC102 S
KRC104 S
KTA1504 Y
KTC3875 GR

REF. NO DESCRIPTION POSITION

SW709 FAST FORWARD/PRESET UP ON—OFF
SW710 OPEN/CLOSE ON—OFF
SW711 DISC 5 ON—OFF
SW712 DISC 4 ON—OFF
SW713 DISC 3 ON—OFF
SW714 DISC 2 ON—OFF
SW715 DISC 1 ON—OFF
SW716 TUNING UP ON—OFF
SW717 AUDIO IN ON—OFF

TOP VIEW

TOP

VIEW

(2)

C

MA111
1N4004

DRL204F

HSS4148

TOP VIEW

KDS184

FRONT

VIEW

AC AC

D10XB60F

6 – 1

FRONT
VIEW

SLR342VC

CD-MPX880H

[3] Schematic Diagram

A

NC

FM SIGNAL
CD SIGNAL

B

AUDIO SIGNAL
PLAYBACK SIGNAL

RECORD SIGNAL

NC

NC

NC

C

NC
NC

D

E

F

G

H

1

23456

Figure 6-1: MAIN SCHEMATIC DIAGRAM (1/6)

6 – 2

CD-MPX880H

7

8 9 10 11 12

Figure 6-2: MAIN SCHEMATIC DIAGRAM (2/6)

6 – 3

CD-MPX880H

13

14 15 16 17 18

Figure 6-3: MAIN SCHEMATIC DIAGRAM (3/6)

6 – 4

CD-MPX880H

A

B

C

D

E

F

G

H

1

23456

Figure 6-4: MAIN SCHEMATIC DIAGRAM (4/6)

6 – 5

CD-MPX880H

7

8 9 10 11 12

Figure 6-5: MAIN SCHEMATIC DIAGRAM (5/6)

6 – 6

CD-MPX880H

NC
NC

NC
NC

NC

NC

WZX26AW

13

14 15 16 17 18

Figure 6-6: MAIN SCHEMATIC DIAGRAM (6/6)

6 – 7