Sharp CD-MPX100E User manual

CD-MPX100E
SERVICE MANUAL
• 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 Dramatic and Musical
Performers Protection Act 1956, the Performers Protection Acts
1963 and 1972 and to any subsequent statutory enactments and
orders.
SHARP CORPORATION
CONTENTS
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.
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
CHAPTER 1. GENERAL DESCRIPTION
[1] Specifications.................................................1-1
[2] Names of parts...............................................1-2
CHAPTER 2. ADJUSTMENTS
[1] Mechanism section ........................................2-1
[2] Tuner section .................................................2-1
[3] TEST MODE..................................................2-2
[4] CD section......................................................2-3
CHAPTER 3. MECHANISM BLOCKS
[1] Caution on diassembly...................................3-1
[2] Removing and reinstalling the main parts........3-4
CHAPTER 4. DIAGRAMS
[1] Block diagrams............................................... 4-1
CHAPTER 5. CIRCUIT DESCRIPTION
[1] Notes on schematic diagram.......................... 5-1
[2] Types of transistor and LED........................... 5-1
[3] Waveforms of CD circuit ................................5-2
[4] Voltage...........................................................5-3
CHAPTER 6. CIRCUIT SCHEMATICS AND PARTS
LAYOUT
[1] Schematic diagram........................................6-1
[2] Wiring side of PWB......................................6-11
CHAPTER 7. FLOWCHART
[1] Troubleshooting.............................................7-1
CHAPTER 8. OTHERS
[1] Function table of IC .......................................8-1
[2] FL Display......................................................8-9
Parts Guide
DISPLAY
No. S3528CDMPX10H
In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.
MINI COMPONENT SYSTEM
CD-MPX100E
MODEL
CD-MPX100E Mini Component System consisting of
CD-MPX100E (main unit) and CP-MPX100H (speaker
system).

CD-MPX100E
– i –
[1] Safety precaution for service manual
Precaution to be taken when replacing and servicing the
Laser Pickup.
The AEL (Accessible Emission Level) of Laser Power Output
for this model is specified to be lower than Class 1 Require-
ments. However, the following precautions must be observed
during servicing to protect your eyes against 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 sev-
eral 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.
[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 cus-
tomer to use.
Setting of Withstanding Voltage Tester and set.
Laser Diode Properties
Material: GaAIAs
Wavelength: 780 nm
Emission Duration: continuous
Laser Output: max. 0.6 mW
Set name set value
Withstanding Voltage Tester
Test voltage 4 kV DC
Set time 3 secs
Set current (Cutoff current) 3 mA
Unit
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
CONNECT THE PROBE
TO GND OF CHASSIS
SCREW
WITHSTANDING
VOLTAGE TESTER

CD-MPX100E
PRECAUTIONS FOR USING LEAD-FREE SOLDER
1. Employing lead-free solder
“All PWBs” of this model employs lead-free solder. The LF symbol indicates lead-free solder, and is attached on the PWBs 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 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.
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 92LPWB6295MANS Main/Display/Headphones
PWB-B 92LPWB6295PWRS Power/Transformer
PWB-C 92LPWB6243CDUS CD MP3
– ii –

CD-MPX100E
1 – 1
AudioCD-MPX100EService ManualCD-MPX100EMarketE
CHAPTER 1. GENERAL DESCRIPTION
[1] Specifications
General
Amplifier
CD player
Tuner
Cassette deck
Power source AC 230 - 240 V, 50 Hz
Power consumption 50 W
Dimensions Width: 270 mm (10-5/8")
Height: 305 mm (12")
Depth: 342 mm (13-1/2")
Weight 6.1 kg (13.42 lbs.)
Output power MPO: 78 W (39W+39W)(10%T.H.D.)
RMS: 40 W (20W+20W)(10%T.H.D.)
RMS: 34 W (17W+17W)(0.9%T.H.D.)
Output terminals Speaker: 6 ohms
Headphones: 16 - 50 ohms
(recommended: 32 ohms)
Input terminals Video/Auxiliary (audio signal):
500 mV/47 k ohms
Type 3-disc multi-play compact disc player
Signal readout Non-contact, 3-beam semiconductor laser
pickup
D/A converter 1-bit D/A converter
Frequency response 20 - 20,000 Hz
Dynamic range 90 dB (1 kHz)
Frequency range FM: 87.5 - 108.0 MHz
AM: 522 - 1,620 kHz
Frequency response 50 - 14,000 Hz (normal tape)
Signal/noise ratio 55 dB (TAPE 1, playback)
50 dB (TAPE 2, recording/playback)
Wow and flutter 0.3 % (WRMS)
Type 2-way type speaker system
12 cm (4-3/4") Woofer with Piezo
Maximum input
power
40 W
Rated input power 20 W
Impedance 6 ohms
Dimensions Width: 200 mm (7-7/8")
Height: 305 mm (12")
Depth: 185 mm (7-1/4")
Weight 2.4 kg (5.3 lbs.)/each
CD-MPX100E
CP-MPX100H
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
Specifications for this model are subject to change without
prior notice.

CD-MPX100E
1 – 2
[2] Names of parts
Front panel
1. Disc Tray
2. Timer Set Indicator
3. Memory/Set Button
4. On/Stand-by Button
5. Display Button
6. Clock/Timer Button
7. Tuning Up Button
8. Tuning Down Button
9. Headphone Socket
10. Tape 2 Record Pause Button
11. Tape 1 Cassette Compartment
12. Equalizer Mode Select Button
13. Extra Bass/Demo Mode Button
14. Volume Up and Down Buttons
15. Disc Skip Button
16. Disc Tray Open/Close Button
17. Tape 2 Cassette Compartment
18. CD Button
19. Tape (1 2) Button
20. Disc or Tape Stop Button
21. Disc Track Down or Fast Reverse, Tape 2 Rewind,
Tuner Preset Down, Time Down Button
22. Tuner (Band) Button
23. Video/Auxiliary Button
24. Disc Play or Repeat, Tape Play Button
25. Disc Track Up or Fast Forward, Tape 2 Fast Forward,
Tuner Preset Up, Time Up Button
MINI COMPONENT SYSTEM CD-MPX100W
3
4
5
2
1
6
11
9
7
8
10
12
16
14
15
17
13
22
23
24
25
18
19
20
21
DISPLAY
CD-MPX100E
Display
1. Disc Number Indicators
2. CD Play Indicator
3. CD Pause Indicator
4. Memory Indicator
5. CD Repeat Play Indicator
6. WMA Indicator
7. CD Indicator
8. MP3 Indicator
9. Extra Bass Indicator
10. Tape Play Indicator
11. FM Stereo Mode Indicator
12. Daily Timer Indicator
13. FM Stereo Receiving Indicator
14. Tape 2 Record Indicator
15. Sleep Indicator
16. Timer Play Indicator
17. Timer Recording Indicator
Rear panel
1. AC Power Lead
2. FM/AM Loop Aerial Socket
3. Video/Auxiliary (Audio Signal) Input Sockets
4. Speaker Terminals
1
4
2
3

CD-MPX100E
1 – 3
Remote control
1. Remote Control Transmitter
2. Disc Number Select Buttons
3. MP3/WMA Display Button
4. Disc Clear/Dimmer Button
5. Memory Button
6. Disc Random Button
7. Tape 2 Record Pause Button
8. Disc Track Down or Fast Reverse, Tape 2 Rewind,
Tuner Preset Down, Time Down Button
9. Equalizer Mode Select Butto
10. Tuner (Band) Button
11. CD Button
12. On/Stand-by Button
13. Extra Bass Button
14. Clock/Timer Button
15. Disc Direct Search Buttons
16. Disc Pause Button
17. Disc Track Up or Fast Foward, Tape 2 Fast Forward,
Tuner Preset Up, Time Up Button
18. Disc/Tape Stop Button
19. Disc Play or Repeat/Tape Play Button
20. Video/Auxiliary Button
21. Tape (1 2) Button
22. Volume Up Button
23. Volume Down Button
1
2
4
7
8
9
10
11
12
13
15
16
17
18
19
20
21
23
3
5
6
14
22
CD-MPX100E
CP-MPX100H
1. Piezo
2. Woofer
3. Bass Reflex Duct
4. Speaker Wire
4
3
1
3
2

CD-MPX100E
2 – 1
AudioCD-MPX100EService ManualCD-MPX100EMarketE
CHAPTER 2. ADJUSTMENTS
[1] Mechanism section
• Driving Force Check
• Torque Check
• Tape Speed
[2] Tuner section
fL: Low-range frequency
fH: High-range frequency
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
•FMRF
Signal generator: 1 kHz, 40 kHz dev., FM modulated
•FMIF
Signal generator: 10.7 MHz, FM modulated
Torque Meter Specified Value
Play: TW-2111 Tape 1: Over 80 g
Tape 2: Over 80 g
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
Test Tape Adjust-
ing Point Specified Value Instrument Connection
Normal
speed MTT-111 Variable Resistorin
motor.
3,000 ±30 Hz
Speaker Speaker Ter- minal (Load
resistance: 6
ohms)
Figure 1
Test Stage Frequency Frequency
Display Setting/ Adjusting
Parts
Instrument
Connection
AM IF 450 kHz 1,620 kHz T351 *1
AM Band
Coverage — 522 kHz (fL): T306 1.1 ±0.1 V *2
AM
Tracking 990 kHz 990 kHz (fL): T303 *1
*1. Input: Antenna Output: TP302
*2. Input: Antenna Output: TP301
TAPE MECHANISM
Tape
Motor
Variable Resistor in motor
Test
Stage Frequency Frequency Display Setting/ Adjusting
Point
Instrument
Connection
FM Band
Coverage — 87.50 MHz T301 (fL): 1.3 V ±0.1 V *1
FM RF 98.00 MHz
(10-30 dB) 98.00 MHz L312 *2
*1. Input: Antenna Output: TP301
*2. Input: Antenna Output: Speaker terminal
Test
Stage Frequency Frequency Display Setting/Adjust- ing Point Instrument Connection
IF 10.7 MHz 98 MHz T302 (Turn the
core of trans-
former T302
fully counter
clockwise)
*1
Figure 2 Adjustment Points
AM IF
FM RF
TP301
TP302
FM IF
T301
T302
R356
R381
T303
T306
IC301
L312
T351
CNP301
AM/FM LOOP ANTENNA
FM BAND
COVERAGE fL
AM BAND
COVERAGE fL
AM TRACKING
fL
MAIN PWB
1

CD-MPX100E
2 – 2
[3] TEST MODE
•Setting the test mode
Any one of test mode can be set by pressing several key as follows.
<X-BASS> + <CD> + <ON/STAND-BY> TEST: CD operation test.
Function: -CD test mode.
-Enter test mode.
CD TEST
OPEN/CLOSE operation is using manual.
<< >>, << >> buttons make pick's slide possible.
Do TOC IL. Do normal play.
When these following key is input
into PLAY key, track number can
be appoint directly.
<<PLAY>> key input. <<MEMORY>> key input.
<< 1 >> key: Track 4
<< 2>> key: Track 9
<< 3>> key: Track 15
<<STOP>> key input.
STOP
Laser ON.
<<MEMORY>> key input.
Tracking OFF play at that
specific point.
<<MEMORY>> key input.
Tracking ON play from
that specific point.
<<STOP>> key input.
STOP
IL isn't done
VOL Ñ Last memory
BAL Ñ CENTER
P.GEQ Ñ FLAT
X-BASS Ñ OFF
To cancel : Power OFF
Sliding the PICKUP with
<< >>, << >> button
must only be in STOP mode.
<<MEMORY>>
key input.
Adjustment result
automatically will
display as below.
for each 2 sec :
a) "FOFF_XX"
b) "TOFF_XX"
c) "TBAL_XX"
d) "TGAN_XX"
f) "FGAN_XX"
g) "RFLS_XX"
explanation:
a) Focus off set = "FOFF_XX"
b) Tracking off set = "TOFF_XX"
c) Tracking balance = "TBAL_XX"
d) Tracking Gain = "TGAN_XX"
f) Focus Gain = "FGAN_XX"
g) RF level shift = "RFLS_XX"
Adjustment result automatically will
display as below for each 2 sec :
a) "FOFF_XX"
b) "TOFF_XX"
c) "TBAL_XX"
d) "TGAN_XX"
f) "FGAN_XX"
g) "RFLS_XX"
<<MEMORY>> key input.

CD-MPX100E
2 – 3
[4] CD section
•Adjustment
Since this CD system incorporates the following automatic adjust-
ment functions, readjustment is not needed when replacing the
pickup. Therefore, different PWBs and pickups can be combined
freely.
Each time a disc is changed, these adjustments are performed
automatically. Therefore, playback of each disc can be performed
under optimum conditions.
Items adjusted automatically
1) Offset adjustment (The offset voltage between the head amplifier
output and the VREF reference voltage is compensated inside the
IC.)
* Focus offset adjustment
* Tracking offset adjustment
CD Error code description
* 'CHECKING'
If Error is detected, 'CHECKING' will be displayed instead of 'ER-
CD**' display. 'ER-CD**' display will only be displayed when error
had been detected for the 5 th times.
Standard Specification of Stereo System Error Message Display Contents
(*) CHECKING:
If CD changer mechanism error is detected, 'CHECKING' will be display instead of 'ER-CD**' display.
'ER-CD**' will only be display when CD changer mechanism error had been detected for the 5 th times.
Error Explanation
01 When Pickup set inner position, inner switch cannot detect
‘ON’ level for 10 secs.
10*
When tray moves to Open/Close, Open/Close switch can-
not detect ‘ON’ level for 7 secs.
When disc table rotate to target position.
Clamp switch cannot detect ‘ON’ level for 7 secs.
11* When disc table set to Disc1 position for 1 st time. “CLAMP SW”, “DISC NO SW” and “OPEN/CLOSE” cannot
detect ‘ON’ level for 14 secs.
31 When it change to CD function, DSP cannot read initial
data.
Error Contents Display Notes
CD Pickup Mechanism Error. 'ER-CD**' 01: PU-IN SW Detection NG.
CD Changer Mechanism Error. 'ER-CD**' (*) 10: Changer Error.
11: Initial Error.
CD DSP Communication Error. 'ER-CD**' 31: DSP COMMUNICATION ERROR.
Focus Not Match. 'NO DISC'
TUNER PLL Unlock. PLL Unlock.
FM 87.5 MHz

CD-MPX100E
2 – 4
Speaker abnormal detection and +B PROTECTION display
In case speaker abnormal detection or +B PROTECTION had
occurred, it can be check by pressing 'POWER' and 'X-BASS' button
twice.
Display will show “S** B**”. S is referring to speaker abnormal detec-
tion and B is referring to +B PROTECTION. ** is in hex valve.
+B PROTECTION is condition when irregular process occur on power
supply line.
BEFORE TRANSPORYING 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 X-BASS/DEMO button,
press the ON/STAND-BY button until “CLEAR AL” appears.
3. While pressing down the button and the X-BASS/DEMO
button, press the ON/STAND-BY button until “WAIT” →“FIN-
ISHED” appears.
4. Unplug the AC cord and the unit is ready for transporting.
/

CD-MPX100E
3 – 1
AudioCD-MPX100EService ManualCD-MPX100EMarketE
CHAPTER 3. MECHANISM BLOCKS
[1] Caution on disassembly
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 they need to be removed when disassembling the unit. After servicing the unit, be sure to rearrange
the leads where they were before disassembling.
1 Top Cabinet 1. Screw ...................... (A1) x4
2 Side Panel 1. Screw ...................... (B1) x8
(Left/Right)
3 CD Tray Cover/ 1. Turn on the power supply, ..
CD Player Unit open the disc tray, take out
the CD tray cover, and close.
(Note 1)
2. Screw ...................... (C1) x1
3. Hook ........................ (C2) x3
4. Hook ........................ (C3) x2
6. Flat Cable (C5) x1
4 Rear Panel 1. Screw ...................... (D1) x7
5 Main PWB 1. Screw ...................... (E1) x4
2. Socket ..................... (E2) x3
3. Flat Cable ............... (E3) x1
4. Flat Wire .................. (E4) x1
6 Front Panel 1. Screw .......................(F1) x2
2. Hook .........................(F2) x2
3. Flat Wire ...................(F3) x1
7 Display PWB 1. Screw ...................... (G1) x9-2. Flat Cable ............... (G2) x1
4. Flat Cable ............... (M4) x1
Tape Mechanism 1. Open the cassette holder.
2. Screw...................... (H1) x6
9 Headphones PWB 1. Screw ...................... (J1) x1
10 Turntable 1. Hook ......................... (K1) x2
2. Stabilizer Holder ...... (K2) x1
11 Loading Tray 1. Turn fully the lock lever in the
arrow direction
.
2.
Push the loading tray backward
to engage the claw with the
groove and remove it in the
direction of the arrow . (L1) x6
12 CD MP3 PWB 1. Screw ...................... (M1) x2
(Note 2) 2. Hook ........................ (M2) x1
3. Socket ..................... (M3) x2
13 CD Mechanism 1. Hook ........................ (N1) x2
2. Hook ........................ (N2) x2
STEP REMOVAL PROCEDURE
Note 1: How to open the changer manually.
1. In this state, turn fully the lock lever in the arrow direction through
the hole on the loading tray bottom.
2. After that, push forward the Loading tray.
Note 2:
1. 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 electro-
static damage.
Note 3:
1. Be careful not to break the claw of the CD mechanism.
2. When fining back the cam gear assembly, let it lock by front
movement.
(B1)x2
φ 3x10mm
(A1)x2
φ 3x12mm
(A1)x2
φ 3x12mm
(B1)x2
φ 3x10mm
(B1)x4
φ 3x10mm
Rear
Panel
Side Panel
(Right)
Side Panel
(Left)
Top Cabinet
Front
Panel
Lock Lever
CD Player Unit
(Bottom View)
CD-MPX100E
(C3)x1
CD Player
Unit
CD Tray Cover
(C2)x3
1
1
2
2
(E1)x1
φ 3x10mm
(E1)x1
φ 3x10mm
(D1)x1
φ 3x10mm
Lug Wire
Main PWB
Rear
Panel
Pull
(C3)x1
(D1)x6
φ 3x10mm
(C1)x1
φ 3x10mm
(C4)x1
(C5)x1
(C4)x1
CD MP3 PWB
8
5. Socket ..................... (C4) x2
...............

CD-MPX100E
3 – 2
(F1)x2
φ 3x10mm
Headphones
PWB
(E4)x1
Front
Panel
(E1)x2
φ 3x6mm
Main PWB
Transformer
PWB
Power PWB
(F2)x1
(F2)x1
(E2)x1
(E3)x1
(E2)x2
(F3)x1
Display PWB
Tape
Mechanism
Front Panel
Headphones
PWB
(J1)x1
φ 3x10mm
(G2)x1
Display PWB
Open
Cassette
Holder
Tape
Mechanism
(H1)x6
φ 3x10mm
Lug Wire
Front Panel
(G1)x9
φ 3x10mm
CD Player Unit
Loading
Tray
(K2)x1
(K1)x2
Turntable
(L1)x3
3
(L1)x3 Loading Tray
1
2
(M4)x1
Loading
Tray
(M1)x2
φ 3x10mm
CD MP3
PWB
(M2)x1
(M3)x2

CD-MPX100E
3 – 3
1 Woofer 1. Net Frame Ass'y...... (A1) x1
2. Screw ...................... (A2) x4
STEP REMOVAL PROCEDURE
CP-MPX100H
Screwdriver
Driver should
be pried away
from Speaker Box.
Speaker Box
(A1)x1
(A2)x4
φ 4x12mm
Speaker Box
Woofer
Piezo
CD
Mechanism (N2)x2
(N1)x1
(N1)x1 Loading Tray

CD-MPX100E
3 – 4
[2] Removing and reinstalling the main parts
1. TAPE MECHANISM SECTION
Perform steps 1 to 6 and 8 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.
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.
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.
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.
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.
1.6. How to remove the motor. (See Fig. 5)
1. Remove the screws (F1) x 2 pcs., to remove the motor.
Figure 1
Figure 2
(A1)x2
φ2x9mm
TAPE 2
Record/Playback
Head
Erase Head
Clutch Ass'y
(B1)x2
φ2x9mm
TAPE 1
Playback
Head
Clutch Ass'y
Figure 3
Figure 4
Figure 5
Pinch Roller
(C1)x1 <A>
<B>
Pinch
Roller
Pawl
Pull
TAPE 2 TAPE 1
Main Belt
(E1)x1
TAPE 2
Main Belt
(D1)x1
TAPE 1
Main Belt
(D1)x1 Main Belt
(E1)x1
FF/REW
Belt
(D2)x1
FF/REW
Belt
(E2)x1
Tape
Motor
Tape
Motor
(F1)x2
φ2.6x5mm
Tape
Motor
Clutch Ass'y

CD-MPX100E
3 – 5
2. CD MECHANISM SECTION
Perform steps 1, 2, 3, 10, 11 and 13 of the disassembly method to
remove the CD mechanism.
2.1. How to remove the loading motor. (See Fig. 1)
1. Bend the hooks (A1) x 5 pcs., to remove the loading motor.
2.2. Remove the pickup. (See Fig. 2)
1. Remove the stop washer (B1) x 1 pc., to remove the gear (B2) x 1
pc.
2. Remove the screws (B3) x 2 pcs., to remove the shaft (B4) x 1 pc.
3. Remove the pickup.
NOTE: After removing the connector for the optical pickup from the
connector wrap the conductive aluminium foil around the front
end of connector so as to protect the optical pickup from elec-
trostatic damage.
Figure 1
Figure 2
(A1)x5
Loading
Motor PWB
Loading
Motor
Loading
Tray
(B3)x2
φ2.6x6mm
Shaft
(B4)x1
Stop Washer
(B1)x1
Gear
(B2)x1
CD Mechanism
Pickup
Unit

CD-MPX100E
4 – 1
AudioCD-MPX100EService ManualCD-MPX100EMarketE
CHAPTER 4. DIAGRAMS
[1] Block diagrams
Figure 4-1 BLOCK DIAGRAM (1/3)
7
IC101
AN7345K
PLAYBACK AND RECORD
/PLAYBACK AMP.
AUX
R
L
R
L
JK690
VIDEO/AUX IN
Ð20dB
ATT
Q101~
Q104
Q107
Q108
Q601
Q602
REC/PLAY
CLK
CE
DI
+B4
L
R
BIAS
T1/T2
MUTING
P.B. REC.
AC BIAS
L
L
R
R
R
L
TAPE
TUNER
CD
PB
CNP5
FROM CD SECTION
HEAD
ERASE
SWITCHING
SWITCHING
SWITCHING
BIAS
Q113
Q114
Q112
Q110
Q707
Q708
Q709
Q710
Q711
SWITCHING
Q109
BIAS
OSC
Q111
L103
Q105
Q106
REC./P.B.
HEAD
TAPE 2
P.B. HEAD
TAPE 1
R-CH
L-CH
R-CH
L-CH
IC601
LC75341
AUDIO PROCESSOR
+B4
R
L
REC
R
L
ALC
RREC
LREC
POP REDUCE
SWITCHING
L(T2)
R(T2)
R(T1)
L(T1)
21
4
24
2
1
18
11
16
3
15
10
9
7
23
14
12
13
19
7
18
10
13
21
4
2
24
23
6
9
16
12
11
15
1
H/N
P.B
REC
T1/T2
T1/T2
NOR/
HIGH
+B4
+B4
TAPE
MECHANISM
ASS'Y
MOTOR
DRIVER
SOLENOID
DRIVER
+B2
+B2
FM+B
+B4
SWITCHING
IC302
LC72131
PLL(TUNER)
FM
Q360
9 10 21
17
7
MO/ST
FM/AM
OSC
+B4
5436
22 111615
CLK DO DI CE
1 20
VT X352
4.5 MHz
IC303
LA1832S
FM IF DET./
FM MPX./
AM IF
STEREO
AM RF IN
AM OSC IN AM OSC OUT
1821 12162324
FM/AM OUT
R
L
FM/AM
MPXIN
MO/ST
VCO
FM
DET
FM+B
GND
AM IF
AM MIX
985 17 21
13
14
15
4
AM IF
450 kHz
CF352
T351
CF303
+B4
10.7 MHz
X351
456 kHz
ZD351
5.1V
CF351
OSC BUFF
FM
OSC
AM BAND
COVERAGE
AM TRACKING
T303 T306
Q302
FM RF
OSC
FM
L312 T301
8
4
357
FM IF
T302
9
6
IC301
TA7358AP
FM FRONT END
B.P.F
BF301
AM LOOP
ANTENNA
CNP301
FM
ANTENNA
1
2
3
1
BI601CNS601
1
3
4
1
3
2

CD-MPX100E
4 – 2
Figure 4-2 BLOCK DIAGRAM (2/3)
Q905
ÐVF
VF2
VF1
Q801
+B1
-B1
+B2
+B5
21 41
R
L
+B5
RX701
REMOTE
SENSOR
D803,
D804
D802
RL914
JK701
HEADPHONES
Q709
IC901
STK43205
POWER AMP.
F803
T2A L 250V
VOLTAGE
REGULATOR
F804
T2A L 250V
F801
T3.15A L 250V
F802
T3.15A L 250V
R-OUT
L-OUT
Q901
Q902
D905, D906
CLK
SO901
SPEAKER
TERMINAL
30
A
Y
VLOAD
RESET
+B5 +B5
+B5
VDD VDD
VDD
AVDD
~
CE DI DO
XL701
4.19 MHz
~
BIAS
T
1/T2
SW701-SW707
SW711-SW718
SW721-SW726
KEY
TO CD
SECTION
IC701
IXA057AW
SYSTEM
MICROCOMPUTER
FL701
FL DISPLAY
28
83
81
31 4544
84
1 36 51 52 53
15
1
8
78
68
512
3
2
1
7
13
9
10
100
2
4
32
25
41 79
16 1742 18 20 23
~
10 13 28 29 30 31
80
26
79 8
14
55 15 40
27
T.F.
PT801
MAIN POWER
TRANSFORMER
~
~~~
~~
TAPE
MECHANISM
ASS'Y
RESET
SP DET.
SP RELAY
ON-OFF
AC POWER
SUPPLY CORD
AC 230-240 V, 50 Hz
IC854
KIA78L05
31
VOLTAGE REGULATOR
+B5 UNSW_5.6V
VOLTAGE REGULATOR
VOLTAGE
REGULATOR
VOLTAGE
REGULATOR
1
+B2
+B3
M_+13.5V
LD+7V
+B6
+B7
D_5V
SW_5V
L841
AC LINE
FILTER
IC851
KIA7812P
KIA7810AP
KIA7805AP
IC855
+B4 A_+10V
1
IC852
1
3
3
3
IC853

CD-MPX100E
4 – 3
Figure 4-3 BLOCK DIAGRAM (3/3)
201974
5152
79
7875
76 876521
20
26
32
24
25
22
23
53
54
55
67
65
57
77
70
56
73
72
49
48
47
46
45
44
43
PUIN
DRIVER
SPIN/SLIDE
FOCUS/TRACKING/
LA6261
IC2
VIN4
FWD6
VO6+
VO6-
REV6
VIN3 VIN2 VIN1
PVCC2
IC1
LC78690E
MP3 DECODER/
DIGITAL SIGNAL
PROCESSOR
LCHO
RCHO
CONT0
50
CONT2 CONT1
SLDO
SPDO
FDO
TDO
LDD LDS DIN BIN
1413
FIN EIN CIN AIN AVDD LRVDD XVDD
66 DVDD1.8
38 DVDD1.8
61
VVDD2
68
DVDD
41
DVDD
39
VDD3
36
DVDD
30
VVDD1 AVDD
XIN
XOUT
INTB1
INTB0
RES
DO
DI
CL
CE
TO DISPLAY SECTION
TO MAIN SECTION
CNP3
CNP7
DGND
PICKUP UNIT
IN
PICKUP
SW4
MOTOR
SPINDLE
M1
MOTOR
SLED
M2
COIL
TRACKING
FOCUS COIL
16.9344 MHz
XL1
+5V
Q2
Q3
Q4
LASER
DRIVER
+3.3V
CONSTANT
VOLTAGE
+3.3V
+3.3V
Q1
R-CH AGND L-CH D_+5V(+B6)
CLAMP DISC_NO CD_CE CD_DO OPEN/CLOSE CD_DI
+8V(+B3)
7
27
10
9
28
17151311 23
VCONT6
24
22 3231
30
26
456 3363521
7123456 6
CD_CLK
7
CD_RES
8
CD_INT
9
MP3_INT
1054321
CNP4
42
M
M
37
DGND
- +
654321
654321
654321
M
OPEN/ CLOSE CLAMP
DISC
NUMBER
T/T UP/DOWN
LOADING
MOTOR
SW1 SW2 SW3
M3

CD-MPX100E
5 – 1
AudioCD-MPX100EService ManualCD-MPX100EMarketE
CHAPTER 5. CIRCUIT DESCRIPTION
[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 resis-
tor. 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 sym-
bol is microfarad. 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 Digi-
tal Multimeter between such a section and the chassis with no sig-
nal 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 important for main-
taining the safety of the set. Be sure to replace these parts with
specified ones for maintaining the safety and performance of the
set.
[2] Types of transistor and LED
REF. NO DESCRIPTION POSITION
SW1 OPEN/CLOSE ON—OFF
SW2 CLAMP ON—OFF
SW3 DISC NUMBER ON—OFF
SW4 PICKUP IN ON—OFF
SW701 ON/STAND-BY ON—OFF
SW702 MEMORY/SET ON—OFF
SW703 REC/PAUSE ON—OFF
SW704 TUNING DOWN ON—OFF
SW705 TUNING UP ON—OFF
SW706 CLOCK/TIMER ON—OFF
SW707 DISPLAY ON—OFF
SW711 CD ON—OFF
SW712 TUNER (BAND) ON—OFF
SW713 VIDEO/AUX ON—OFF
SW714 TAPE ON—OFF
SW715 STOP ON—OFF
SW716 PLAY ON—OFF
SW717 FAST FORWARD ON—OFF
SW718 FAST REWIND ON—OFF
SW721 X-BASS/DEMO ON—OFF
SW722 EQUALIZER ON—OFF
SW723 OPEN/CLOSE ON—OFF
SW724 DISC SKIP ON—OFF
SW725 VOLUME UP ON—OFF
SW726 VOLUME DOWN ON—OFF
REF. NO DESCRIPTION POSITION
(1) (2) (3)
(S) (G) (D)
EC B
FRONT
VIEW
BC E
B
(D)
(3)
E
(G)
(1)
C
(S)
(2)
FRONT
VIEW
TOP
VIEW
KRA102 M
KRC104 M
KTA1266 GR
KTA1271 Y
KTA1273 Y
SLR342VCJKTC2026 KTA1504 Y
KTC3875 GR
KRA107 S
KRC102 S
KRC104 S
FRONT
VIEW
KTA1274 Y
KTC3194 Y
KTC3199 GR
KTC3200 GR
KTC3203 Y

CD-MPX100E
5 – 2
[3] Waveforms of CD circuit