Sharp CD-ES900 User manual

CD-ES900/CD-ES99
SERVICE MANUAL
No. S2405CDES900/
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] CD section ......................................................2-2
[4] CD Changer mechanism section ....................2-3
CHAPTER 3. MECHANISM BLOCKS
[1] Caution on disassembly..................................3-1
[2] Removing and reinstalling the main parts.........3-4
CHAPTER 4. DIAGRAMS
[1] Block diagram .................................................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] Wiring side of PWB ........................................ 6-1
[2] Schematic diagram ........................................ 6-8
CHAPTER 7. FLOWCHART
[1] Troubleshooting.............................................. 7-1
CHAPTER 8. OTHER
[1] Function table of IC ........................................ 8-1
[2] FL Display .................................................... 8-10
Parts Guide
MINI COMPONENT SYSTEM
CD-ES900
MODEL
MINI COMPONENT SYSTEM
CD-ES99
MODEL
CD-ES900 Mini Component System consisting of CD-ES900
(main unit) and CP-ES900 (speaker system).
CD-ES99 Mini Component System consisting of
CD-ES99 (main unit) and CP-ES99 (speaker sys-
tem).
In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.

CD-ES900/CD-ES99
– i
IMPORTANT SERVICE NOTES
BEFORE RETURNING THE AUDIO PRODUCT
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 1.5 kohm, 10 watt resistor paralleled
by a 0.15 µF capacitor in series with all exposed metal cabinet parts
and a known earth ground, such as conduit or electrical ground con-
nected 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.
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.
TO EXPOSED
METAL PARTS
CONNECT TO
KNOWN EARTH
GROUND
TEST PROBE
0.15 µF
1.5 kohms
10 W
VTVM
AC SCALE

CD-ES900/CD-ES99
1 – 1
CD-ES900/CD-ES99CD-ES900/CD-ES99Service ManualCD-ES900/CD-ES99MarketE
CHAPTER 1. GENERAL DESCRIPTION
[1] Specifications
General
Amplifier
CD player
Tuner
Cassette deck
Power source AC 120 V, 60 Hz
Power consump-
tion
175 W
Dimensions Width: 10-1/4" (260 mm)
Height: 13" (330 mm)
Depth: 12-7/8" (326 mm)
Weight 22.1 lbs. (10.0 kg)
Output power 200 watts minimum RMS per channel into 6
ohms from 100 Hz to 20 kHz, 10% total har-
monic distortion
Output terminals Speakers: 6 ohms
Headphones: 16 - 50 ohms
(recommended: 32 ohms)
Video output: 1Vp-p
Input terminals Game/Auxiliary (audio signal):
500 mV/47 k ohms
Game/Video: 1Vp-p
Type 5-disc multi-play compact disc player
Signal readout Non-contact, 3-beam semiconductor laser
pickup
D/A converter 1-bit D/A converter
Frequency re-
sponse
20 - 20,000 Hz
Dynamic range 90 dB (1 kHz)
Frequency range FM: 87.5 - 108.0 MHz
AM: 530 - 1,720 kHz
Frequency re-
sponse
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 3-way type speaker system
with passive radiator
Super tweeter x 2
2" (5 cm) tweeter x 1
6-1/2" (16 cm) woofer x 1
4" (10 cm) passive radiator
Maximum input
power
400 W
Rated input power 200 W
Impedance 6 ohms
Dimensions Width: 10-7/8" (277 mm)
Height: 13" (330 mm)
Depth: 11" (279 mm)
Weight 10.6 lbs. (4.8 kg)/each
CD-ES900/CD-ES99
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
CP-ES900/CP-ES99
Specifications for this model are subject to change without
prior notice.

CD-ES900/CD-ES99
1 – 2
[2] Names of parts
Front panel
1. Disc Trays
2. Timer Indicator
3. Power On/Stand-by Button
4. CD Track Up or Fast Forward, Tape 2 Fast Forward,
Tuner Preset Up, Time Up Button
5. Clock/Timer Button
6. Tuning Up Button
7. Tuning Down Button
8. CD Track Down or Fast Reverse, Tape 2 Rewind,
Tuner Preset Down, Time Down Button
9. Equalizer Mode Select Button
10. Tape 1 Cassette Compartment
11. Headphone Jack
12. Game/Video Input Jacks
13. Disc Number Select Buttons
14. CD Direct Play Button
15. Disc Tray Open/Close Button
16. CD Play or Repeat, Tape Play Button
17. Memory/Set Button
18. Tape 2 Record Pause Button
19. CD or Tape Stop Button
20. Extra Bass/Demo Mode Button
21. Volume Control
22. Tape 2 Cassette Compartment
23. Tuner (Band) Button
24. CD Button
25. Tape (1 2) Button
26. Game/Video Button
1
13
15
21
16
17
19
20
3
2
5
6
7
22
14
18
11
8
12
4
9
10
24 25 2623
Display
1. Disc Number Indicators
2. CD Play Indicator
3. CD Pause Indicator
4. Memory Indicator
5. CD Repeat Play Indicator
6. CD Indicator
7. Extra Bass Indicator
8. Tape Play Indicator
9. FM Stereo Mode Indicator
10. Daily Timer Indicator
11. FM Stereo Receiving Indicator
12. Tape 2 Record Indicator
13. Sleep Indicator
14. Timer Play Indicator
15. Timer Recording Indicator
Rear panel
1. Cooling Fan
2. AC Power Cord
3. FM 75 Ohms Antenna Terminal
4. FM Antenna Ground Terminal
5. AM Loop Aerial Jack
6. Video Output Jack
7. Speaker Terminals
1
5
3
6
4
7
8
76321 4 5
13 14 15
10911
12
2
CD-ES900/CD-ES99

CD-ES900/CD-ES99
1 – 3
Remote control
1. Remote Control Transmitter
2. Disc Number Select Buttons
3. Disc Direct Search Buttons
4. CD Clear/Dimmer Button
5. Memory/Set Button
6. CD Track Down or Fast Reverse, Tape 2 Rewind,
Tuner Preset Down, Time Down Button
7. CD Pause Button
8. Tape 2 Record Pause Button
9. Tuner (Band) Button
10. CD Button
11. Tape (1 2) Button
12. Game/Video Button
13. Power On/Stand-by Button
14. Clock/Timer Button
15. CD Random Button
16. CD Track Up or Fast Forward, Tape 2 Fast Forward,
Tuner Preset Up, Time Up Button
17. CD or Tape Stop Button
18. CD Play or Repeat, Tape Play Button
19. Extra Bass Button
20. Equalizer Mode Select Button
21. Volume Up and Down Buttons
1
2
3
5
13
14
19
18
7
8
4
6
10
11
12
20
21
17
16
15
9
1. Tweeter
2. Passive Radiator
3. Woofer
4. Super Tweeters
5. Speaker Wire
1
2
35
4
CD-ES900/CD-ES99
CP-ES900/CP-ES99

CD-ES900/CD-ES99
2 – 1
CD-ES900/CD-ES99CD-ES900/CD-ES99Service ManualCD-ES900/CD-ES99MarketE
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 Adjusting
Point
Specified
Value
Instrument
Connection
Normal
speed
MTT-111 Variable
Resistor in
motor.
3,000 ±30 Hz
Speaker
Speaker Ter-
minal (Load
resistance: 6
ohms)
Figure 1
TAPE MECHANISM
Tape
Motor
Variable Resistor in motor
Test Stage Frequency Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
AM IF 450 kHz 1,720 kHz T351 *1
AM Band
Coverage
— 530 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
Test
Stage
Frequency Frequency
Display
Setting/
Adjusting
Parts
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/
Adjusting
Point
Instrument
Connection
IF 10.7 MHz 98 MHz T302
(Turn the core of
transformer 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 LOOP
ANTENNA
SO302
FM ANTENNA
TERMINAL
FM BAND
COVERAGE fL
AM BAND
COVERAGE fL
AM TRACKING
fL
MAIN PWB
1

CD-ES900/CD-ES99
2 – 2
[3] CD section
CD Error code description
* ‘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 5th times.
Standard Specification of Stereo System Error Message Display Contents
(*) 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
5th times.
Speaker abnormal detection and +B PROTECTION display.
In case speaker abnormal detection or +B PROTECTION had occurred, it can be checked by pressing ‘POWER’, ‘ ’ and ‘X-BASS’ button. Micro
Computer version number will be displayed as “U******”.
Press ‘VIDEO/AUX’ button during version number display and then press ‘POWER’, ‘MEMORY/SET’ and ‘VIDEO/AUX’ button.
Display will show “S**B**”. S is referring to speaker abnormal detection and B is referring to +B PRPTECTION. ** is in hex values.
+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 X-BASS/DEMO button, press the ON/STAD-BY button.
The Micro Computer version number will be displayed as “U******”.
3. Press OPEN/CLOSE button until “WAIT” →“FINISHED” appears.
4. Unplug the AC cord and the unit is ready for transporting.
Error Explanation
01 When Pickup set inner position, inner switch cannot
detect ‘ON’ level for 10 secs.
10* CAM error. Can’t detect CAM switch when CAM is mov-
ing.
11* When it detect CAM operation error during initialize pro-
cess.
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.
Error Contents DISPLAY Notes
CD Pickup Mechanism Error. ‘ER-CD01’ PU-IN SW Detection NG.
CD Changer Mechanism Error. ‘ER-CD**’
(*)
10: CAM SW Detection NG during normal operation.
11: CAM SW Detection NG during initialize process.
20: TRAY SW Detection NG during normal operation.
21: TRAY SW Detection NG during initialize process.
CD DSP Communication Error. ‘ER-CD31’ DSP COMMUNICATION ERROR
Focus Not Match/IL Time Over ‘NO DISC’
TUNER PLL Unlock PLL UNLOCK
F
M 87.5 MH
z

CD-ES900/CD-ES99
2 – 3
[4] CD Changer mechanism section
• A number in the drawing sheet is the number of the parts guide (CHANGER MECHANISM PARTS).
140
141
HALF GEAR
MUST ARRANGE AS SHOWN
1

CD-ES900/CD-ES99
2 – 4
139
2
APPLY SANKOL BEFORE FIX
FIX ITEM 1 ACCORDING TO THE
SHOWN PICTURE ABOVE
ROTATE MODE BIG GEAR UNTIL REACH AS SHOWN IN PICTURE

CD-ES900/CD-ES99
2 – 5
APPLY GREASE
PULL THE LEVER UNITIL
REACH THE ARROW MARK
143
112
3

CD-ES900/CD-ES99
2 – 6
FIGURE 1
FIGURE 2
APPLY GREASE SLOT CLAMP SW AM INSIDE BASE SLOT
152
142
118
4

CD-ES900/CD-ES99
2 – 7
127
128
5
APPLY GREASE AT BOTTOM SIDE
OF GEAR FOLLOW MARKING
NO NEED APPLY GREASE AT BOTTOM
SIDE
O.K
BLACK MARK
FIGURE 1
N.G
OTHER THAN FIGURE 1 DIRECTION ALL N.G
APPLY GREASE AT
TOP SIDE OF GEAR
FOLLOW MARKING

CD-ES900/CD-ES99
2 – 8
APPLY GREASE AT
HALF GEAR AREA
ROTATE CLOCKWISE UNTIL REACH HERE (MAXIMUM)
6
129

CD-ES900/CD-ES99
2 – 9
CHANGE COLOR TO BLACK
150151148
7

CD-ES900/CD-ES99
2 – 10
124
131
TRAY BIG GEAR
CHANGE COLOR
TO BLACK
TRAY BIG GEAR
CHANGE COLOR
TO BLACK
GREASE APPLICATION LENGTH
GREASE APPLICATION PORTION
MUST FREE FROM GREASE THE SHOWN AREA
O.K
N.G
SHOWN HOLE MUST FACING ARROW DIRECTION
8

CD-ES900/CD-ES99
2 – 11
TR-RE JOINT GEAR C
APPLY GREASE AT
BOTTOM SIDE ONLY
APPLY GREASE ONLY AT TOP SIDE GEAR
MUST FIX ACCORDING TO THE HOLE'S
138 126 125
9

CD-ES900/CD-ES99
2 – 12
10
148 147 146 145

CD-ES900/CD-ES99
2 – 13
APPLY GREASE
WHEN FIXING ITEM 2 MUST FOLLOW AS SHOWN
121
144
130
11

CD-ES900/CD-ES99
2 – 14
FIGURE 1
FIGURE 3
FIGURE 2
APPLY GREASE SC141
APPLY GREASE
117
12

CD-ES900/CD-ES99
2 – 15
ITEM2,3MUST APPLY GREASE ON TOP SIDE GEAR ONLY
O.K N.G
TOP VIEW AFTER
ASSY
FIX REVERSE N.G
GEAR 112 GEAR 112
134
133
132
13