Sharp CDMP850 Service Manual

CD-MPX850

SERVICE MANUAL

No. S2708CDMPX850

MINI COMPONENT SYSTEM

CONTENTS

PRECAUTIONS FOR USING LEAD FREE SOLDER CHAPTER 1. GENERAL DESCRIPTION

[1] Important Service Safety Precaution ..............1-1

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

[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

[4] CD Changer Mechanism Section ...................2-5

CHAPTER 3. MECHANISM BLOCKS

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

[2]

Removing And Reinstalling The Main Parts

CHAPTER 4. DIAGRAMS

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

[2] Main Block Diagrams......................................4-2

......3-4

MODEL

CD-MPX850 Mini Component System consisting of CD-MPX850 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.

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] Wiring Side Of PWB .................................... 6-10

CHAPTER 7. FLOWCHART

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

CHAPTER 8. OTHERS

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

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

Parts Guide

CD-MPX850

(main unit) and CP-MPX850 (speaker

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.

SHARP CORPORATION

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

CD-MPX850

AudioXL-MP150Service ManualXLMP150MarketE

PRECAUTIONS FOR USING LEAD-FREE SOLDER

1. Employing lead-free solder

"MAIN, POWER, DISPLAY, GAME INPUT, CD MP3, SPEAKER LED, RE-FLASH, CD CHANGER MOTOR (PWB ONLY) 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 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.

PWB-A 92LPWB6736MANS

PWB-B 92LPWB6736DPLS

PWB-C

PWB-D

PWB-E

PWB-F

Parts No.

92LPWB6700CDUS

92LPWB6274LEDS

92LPWB6736FLSS

QPWBF1055AWZZ

MAIN (A1), POWER (A2)

DISPLAY (B1), GAME INPUT (B2)

CD MP3

SPEAKER LED

RE-FLASH

CD CHANGER MOTOR (PWB ONLY)

Description

– i –

CD-MPX850

CHAPTER 1: GENERAL DESCRIPTION

[1] Important Service Safety Precaution

CAUTION : “These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric shock do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so”.

WARNING

1. For continued safety, no modification of any circuit should be attempted.

2. Disconnect AC power before servicing.

CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH SAME TYPE F801 , F802, ,F805 4A, 125V/ F803 ,F804 2A, 125V FUSES.

ATTENTION: POUR ASSURER UNE LONGUE PROTECTION CONTRE UN INCENDIE, REMPLACER SEULEMENT PAR UN FUSIBLE DE TYPE F801 , F802, ,F805 4A, 125V/ F803 ,F804 2A, 125V FUSES.

[2] Important Service Notes (for U.S.A only)

BEFORE RETURNING THE AUDIO PRODUCT

(Fire & Shock Hazard)

Before returning the audio product to the user, perform the following safety checks.

1. Inspect all lead dress to make certain that leads are not pinched or that hardware is not lodged between the chassis and other metal parts in the audio product.

2. Inspect all protective devices such as insulating materials, cabinet, terminal board, adjustment and compartment covers or shields, mechanical insulators etc.

3. To be sure that no shock hazard exists, check for leakage current in the following manner.

Plug the AC line cord directly into a 120 volt AC outlet.

* * Using two clip leads, connect a 1.5k ohm, 10 watt

resistor paralleled by a 0.15µF capacitor in series with all exposed metal cabinet parts and a known earth ground, such as conduit or electrical ground connected to earth ground.

Use a VTVM or VOM with 1000 ohm per volt, or

higher, sensitivity to measure the AC voltage drop across the resistor (See diagram).

* Connect the resistor connection to all exposed metal

parts having a return path to the chassis (antenna, metal cabinet, screw heads, knobs and control shafts, escutcheon, etc.) and measure the AC voltage drop across the resistor.

VTVM

AC SCALE

1.5k ohms 10W

0.15 µ F

TEST PROBE TO EXPOSED METAL PARTS

CONNECT TO KNOWN EARTH GROUND

All check must be repeated with the AC line cord plug connection reversed.

Any reading of 0.3 volt RMS (this corresponds to 0.2 milliamp. AC.) Or more is excessive and indicates a potential shock hazard which must be corrected before returning the audio product to the owner.

1 – 1

–2

CD-MPX850

[3] Specifications

General

Power source AC 120 V, 60 Hz

Power consumption

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

Weight 16.5 lbs. (7.5 kg)

Amplifier

Output power 115 watts minimum RMS per channel into 6

Output terminals Front Speakers: 6 ohms

Input terminals Game/ Auxiliary (audio signal):

CD player

Type

Signal readout

D/A converter

Frequency response

Dynamic range

105 W

Height: 13" (330 mm) Depth: 12-7/8" (323 mm)

ohms from 100Hz to 20 KHz, 10% total harmonic distortion.

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

Video output: 1Vp-p

500 mV/ 47 k ohms Game/Video: 1Vp-p

5-disc multi-play compact disc player

Non-contact, 3-beam semiconductor laser pickup

1-bit D/A converter

20 - 20,000 Hz

90 dB (1 kHz)

Tuner

Frequency range

FM: 87.5 - 108.0 MHz AM: 530 - 1,720 kHz

Cassette deck

Frequency response

Signal/noise ratio

Wow and flutter

50 - 14,000 Hz (normal tape)

55 dB (TAPE 1, playback) 50 dB (TAPE 2, recording/playback)

0.3 % (WRMS)

Speaker

Type

Maximum input power

Rated input power 115 W

Impedance 6 ohms

Dimensions

Weight 7.3 lbs. (3.3 kg) /each

3-way type speaker system

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

230 W

Width: 7-7/8" (200 mm) Height: 13" (330 mm) Depth: 9-1/8" (231 mm)

1 – 2

– 4

[4] Names Of Parts

CD-MPX850

Front panel

1. Disc Trays

2. Timer Indicator

3. Tuner (Band) Button

4. CD Button

5. Power On/Stand-by Button

6. Tape (1 2) Button

7. Game/Video Button

8. Tape 1 Cassette Compartment

9. Headphone Jack

10. Game/Video Input Jacks

11. Disc Tray Open/Close Button

12. Disc Number Select Buttons

13. Volume Control

14. CD or Tape Stop Button

15. CD Play or Repeat, Tape Play Button

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

17. CD Track Down or Fast Reverse, Tape 2 Rewind, Tuner Preset Down, Time Down Button

18. Tape 2 Cassette Compartment

19. Remote Sensor

Display

1. Disc Number Indicators

2. MP3/WMA Folder Indicator

3. MP3/WMA Title Indicators

4. MP3 Indicator

5. WMA Indicator

6. Sleep Indicator

7. Timer Play Indicator

8. Timer Recording Indicator

9. Tape 2 Record Indicator

10. MP3/WMA Total Indicator

11. Daily Timer Indicator

12. FM Stereo Mode Indicator

13. FM Stereo Receiving Indicator

14. Tape Play Indicator

15. Memory Indicator

16. Extra Bass Indicator

17. Disc Repeat Play Indicator

18. Disc Pause Indicator

19. Disc Play Indicator

Rear panel

1. Cooling Fan

2. AC Power Cord

3. FM 75 Ohms Antenna Jack

4. AM Antenna Ground Terminal

5. AM Loop Antenna Terminal

6. Speaker Light-up Jacks

7. Video out Jack

8. Front Speaker Terminals

1 – 3

–2

Speaker system

1. Tweeter

2. Super Tweeter

3. Woofer

4. Bass Reflex Duct

5. Speaker Wire

6. Speaker Light-Up Wire

CD-MPX850

8 9

10 11

26 27 28 29

Remote control

1. Remote Control Transmitter

2. Disc Number Select Buttons

3. Clock/Timer Button

4. Character Input/Disc Direct Search Buttons

5. Equalizer Mode Select Button

6. Extra Bass/Demo Button

7. ON/STAND-BY Button

8. CD Button

9. Tuner (Band) Button

10. Tape (1 2) Button

11. Game/Video Button

12. Volume Up and Down Buttons

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

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 80 g

Tape 2: Over 80 g

• Torque Check

Torque Meter Specified Value

Tape 1 Tape 2 Play: TW-2111 30 to 80 g.cm 30 to 80 g.cm Fast forward: TW-2231 — 70 to 180 g.cm

— 70 to 180 g.cm

• Tape Speed

CD-MPX850

Test Tape Adjusting

Normal speed

Figure 1

MTT-111 Variable

Tape Motor

Point

Resistor in motor.

TAPE MECHANISM

Specified

Value

3,000 ± 30 Hz Speaker

Variable Resistor in motor

Instrument

Connection

Speaker Terminal (Load resistance: 6 ohms)

2 – 1

CD-MPX850

[2] Test Mode

• Setting the test mode

During stand-by mode, press GAME/VIDEO button while pressing down the button and 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

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. G E Q — F LAT X-BASS — OFF To cancel : Power OFF

2 – 2

<<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-MPX850

<<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.

2 – 3

CD-MPX850

[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 when error had been detected for the 5

Standard Specification of Stereo System Error Message Display Contents

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

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

NO. 1

FLASHING

OFF

NO. 2

(REPEAT)

TIMER LED

OFF

NO. 1

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

OFF

FLASHING

OFF

NO. 2

1 FRAME

+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 GAME/VIDEO 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

[4] CD Changer Mechanism Section

• All numbers in the drawing correspond to those in parts guide (CHANGER MECHANISM PARTS).

141

CD-MPX850

140

HALF GEAR MUST BE ARRANGED AS SHOWN

2 – 5

CD-MPX850

139

APPLY SANKOL SHS1001 BEFORE FIX

FIX ITEM 139 ACCORDING TO THE PICTURE AS SHOWN ABOVE

ROTATE MODE BIG GEAR UNTIL REACH AS SHOWN IN PICTURE

2 – 6

CD-MPX850

143

APPLY GREASE SC141

112

PULL THE LEVER UNITIL REACH THE ARROW MARK

2 – 7

CD-MPX850

FIGURE 2

FIGURE 1

152

142

APPLY GREASE SC141

118

SLOT CLAMP SWITCH ARM INSIDE BASE SLOT

HALF GEAR MUST BE ARRANGED AS SHOWN

2 – 8

CD-MPX850

APPLY GREASE SC141 AT BOTTOM SIDE OF GEAR FOLLOW MARKING (REFER TO GRAY AREA)

NO NEED TO APPLY GREASE AT BOTTOM SIDE

FIGURE 1

APPLY GREASE SC141 AT TOP SIDE OF GEAR FOLLOW MARKING (REFER TO GRAY AREA)

127

IF DIRECTION IS OTHER THAN DIRECTION SHOWN IN FIGURE 1, IT IS INCORRECT

CORRECT

128

INCORRECT

BLACK MARK

2 – 9

CD-MPX850

APPLY GREASE SC141 AT HALF GEAR AREA

ROTATE CLOCKWISE UNTIL REACH HERE (MAXIMUM)

129

2 – 10

CD-MPX850

151150149

2 – 11

CD-MPX850

THE SHOWN AREA MUST FREE FROM GREASE

CORRECT

GREASE SC141 APPLICATION LENGTH

GREASE APPLICATION PORTION

INCORRECT

SHOWN HOLE MUST FACING ARROW DIRECTION

124

131

2 – 12

138 126 125

CD-MPX850

APPLY GREASE SC141 AT BOTTOM SIDE ONLY

TR-RE JOINT GEAR C

APPLY GREASE SC141 ONLY AT TOP SIDE GEAR

MUST BE FIXED ACCORDINGLY TO THE HOLE'S

2 – 13

CD-MPX850

148 147 146 145

2 – 14

CD-MPX850

121

144

WHEN FIXING ITEM 144 MUST FOLLOW AS SHOWN

APPLY GREASE SC141

130

2 – 15

CD-MPX850

117

FIGURE 2

FIGURE 1

APPLY GREASE SC141

FIGURE 3

APPLY GREASE SC141

2 – 16

CD-MPX850

ITEM 133 , 134 MUST APPLY GREASE SC141 ON TOP SIDE GEAR ONLY

134

GEAR 112 GEAR 112

133

132

CORRECT

TOP VIEW AFTER BEING ASSEMBLED

INCORRECT

IT IS INCORRECT TO FIX IT IN REVERSED DIRECTION

2 – 17

CD-MPX850

APPLY GREASE SC141 BEFORE FIX

MOVE 112 UNTIL TOUCH THE WALL

DURING GEAR A ROTATE MUST PRESS SHOWN AREA

AND LEVER B WILL MOVE ARROW DIRECTION THEN FIX PART 108

SCREW TORQUE

+0.5

2 kgf-cm

- 0

108 803 x6

APPLY GREASE SC141

CONFIRM WHETHER FIXED PROPELY OR NOT

2 – 18

CD-MPX850

APPLY GREASE SC141

113

BEHIND THE LEVER NEED TO APPLY GREASE SC141

PULL IT THEN LEVER WILL MOVE IN

2 – 19

CD-MPX850

123

115

APPLY GREASE SC141

APPLY GREASE SC141 BEFORE FIX

APPLY GREASE SC141 AT BOSS

SPRING MUST BE ARRANGED UNDER THE HOOK

CORRECT LR JOINT LEV

BOARD R

LR JOINT LEV

INCORRECT

2 – 20

CD-MPX850

IT IS INCORRECT IF ASSEMBLED IN A REVERSED DIRECTION

103 137 136

APPLY GREASE SC141

BIG SLOT MUST FACING OUT WHEN FIX AND AFTER FIXED TO BASE CHASSIS. AFTER ASSEMBLY, CONFIRM WITH FREE DROP TEST

GEAR POSITION DURING FIXING

2 – 21

CD-MPX850

IT IS INCORRECT IF ASSEMBLED IN A REVERSED DIRECTION

APPLY GREASE SC141

104

135

136

BIG SLOT MUST FACING OUT

WHEN FIX AND AFTER FIXED TO BASE CHASSIS AFTER ASSEMBLY, CONFIRM WITH FREE DROP TEST

GEAR POSITION DURING FIXING

CONFIRM BOTH GEARS SIT PROPERLY AND LOCKED

2 – 22

120

AFTER FIX OUTER UP/DOWN LEVER HOLD AS SHOWN PORTION AND MOVE UP/DOWN THEN CONFIRM WHETHER LEVER GO INSIDE THE HOLE OR NOT

137

IT IS CORRECT IF THE LEVER HOLD

BIGGER SLOT FACING OUT

ENTERS THE HOLE

CD-MPX850

119

IT IS INCORRECT IF THE LEVER HOLD DOES NOT ENTER THE HOLE

135

BIGGER SLOT FACING OUT

ALL OF THIS 135 AND 137 GEAR FIX TOGETHER WITH 119

AND 120 LEVER ( MOVE TOGETHER )

2 – 23

CD-MPX850

BIG SLOT FACING OUT

110

2 – 24

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