Sharp CD-CH1500 User manual

– 1 –
CD-CH1500
CONTENTS Page
IMPORTANT SERVICE NOTES (FOR U.S.A. ONLY)....................................................................................................... 2
SPECIFICATIONS ............................................................................................................................................................. 2
NAMES OF PARTS ........................................................................................................................................................... 3
OPERATION MANUAL ...................................................................................................................................................... 5
DISASSEMBLY.................................................................................................................................................................. 9
REMOVING AND REINSTALLING THE MAIN PARTS................................................................................................... 12
NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 13
TYPES OF TRANSISTOR AND LED............................................................................................................................... 13
BLOCK DIAGRAM ........................................................................................................................................................... 14
SCHEMATIC DIAGRAM .................................................................................................................................................. 20
WIRING SIDE OF P.W.BOARD....................................................................................................................................... 31
FUNCTION TABLE OF IC................................................................................................................................................ 40
PARTS GUIDE/EXPLODED VIEW
PACKING OF THE SET (FOR U.S.A. ONLY)
SERVICE MANUAL
SHARP CORPORATION
No. S1107CDCH1500
• In the interests of user-safety the set should be restored to its original
condition and only parts identical to those specified should be used.
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
CD-CH1500 Audio Tower System consisting of CD-CH1500 (main
unit) and CP-RW5500 (speaker system).
CD-CH1500
MODEL
AUDIO TOWER SYSTEM
The Service Manual is for the CD-CH1500, which is a minor-modification model
of the CD-CH1000. This manual, therefore, describes only the changed points
from the service manual. Please refer to the CD-CH1000 service manual
(S8070CDCD1000) together with this manual.
CD-CH1000
REMOVING AND REINSTALLING THE MAIN PARTS .................. 12
CD CHANGER MECHANISM MAIN BASE PARTS ASSEMBLING/
ADJUSTING PROCEDURE ............................................................ 13
ADJUSTMENT ................................................................................. 20
TEST MODE .................................................................................... 21
ERROR MESSAGE LIST................................................................. 24
WAVEFROMS OF CD CIRCUIT ..................................................... 52
TROUBLESHOOTING..................................................................... 53
LCD DISPLAY.................................................................................. 62

CD-CH1500
– 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
pinchedorthathardwareisnotlodgedbetweenthechassis
and other metal parts in the audio product.
2. Inspect all protective devices such as insulating materials,
cabinet,terminalboard,adjustmentandcompartmentcovers
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
havingareturnpathtothechassis(antenna,metalcabinet,
screw heads, knobs and control shafts, escutcheon, etc.)
and measure the AC voltage drop across the resistor.
AlltestsmustberepeatedwiththeAClinecordplugconnection
reversed.
Anyreading of0.3 voltRMS(thiscorrespondsto0.2milliamp.
AC.) or more is excessive and indicates a potential shock
hazard which must be corrected before returning the audio
product to the owner.
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
AC SCALE
VTVM
1.5k ohms
10W
0.15∝F
TEST PROBE
TO EXPOSED
METAL PARTS
CONNECT TO
KNOWN EARTH
GROUND
SPECIFICATIONS
CD-CH1500
CP-RW5500
Specifications for this model are subject to change without
prior notice.
General
Power source AC 120 V, 60 Hz
Power consumption 175 W
Dimensions Width: 7-7/8" (200 mm)
Height: 13-7/8" (352 mm)
Depth: 14-7/8" (377 mm)
Weight 21.4 lbs. (9.7 kg)
Amplifier
Output power 100 watts minimum RMS per channel into 6 ohms from
60 Hz to 20 kHz, 10 % total harmonic distortion
Subwoofer: 60 W/ch
(60 Hz - 200 Hz, 6 ohms, 10 % T.H.D.)
Main: 40 W/ch
(200 Hz - 20 kHz, 6 ohms, 10 % T.H.D.)
Output terminals Speakers: 6 ohms
Headphones: 16-50 ohms (recommended; 32 ohms)
Input terminals Auxiliary: 500 mV/47 kohms
CD player
Type 6-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)
Tuner
Frequency range FM: 87.5-108.0 MHz
AM: 530-1,720 kHz
Type 3-way type speaker system
2" (5 cm) Tweeter
5-1/4" (13 cm) Woofer
5-1/4" (13 cm) Subwoofer
Maximum input power (Total) 200 W
Rated input power (Total) 100 W
Impedance 6 ohms
Dimensions Width: 7-5/16" (185 mm)
Height: 16-7/16" (417 mm)
Depth: 12-1/4" (311 mm)
Weight 10.6 lbs. (4.8 kg)/each
Cassette deck
Frequency response 50-14,000 Hz (Normal tape)
Signal/noise ratio 50 dB (recording/playback)
Wow and flutter 0.3 % (WRMS)

– 3 –
CD-CH1500
NAMES OF PARTS
CD-CH1500
Front panel
1. Cassette Compartment
2. Volume Up/Demo Button
3. Volume Down Button
4. Timer Set Indicator
5. Power Button
6. CD Direct Play Buttons (with Indicator)/
CD Eject Buttons
7. Disc Trays
8. Headphone Jack
9. Control Panel Open/Close Button
10. CD Play Mode Select Button
11. Equalizer Mode Select Button
12. Extra Bass Button
13. Display Button
14. Menu Button
15. Jog Dial
16. Enter Button
17. CD Button
18. Tape Button
19. Tuner (Band) Button
20. Auxiliary Button
21. Tape Reverse Mode Select Button
22. Clear Button
23. Memory Button
24. CD Fast Reverse, Tape Fast Wind or
Tuning Down Button (with Indicator)
25. Tape Reverse Play Button (with Indicator)
26. CD Fast Forward, Tape Fast Wind or
Tuning Up Button (with Indicator)
27. Tape Record Pause Button
28. Stop Button (with Indicator)
29. CD Play or Pause, Tape Forward Play Button
(with Indicator)
1
2
3
4
5
6
7
8
22
23
24
25
26
27
28
29 14 15 16
17 19 21
18 20
9
10
11
12
13
Multi-function LCD display
1. Function Indicator
2. Extra Bass Indicator
3. Random Play Indicator
4. Memory Indicator
5. Total Indicator
6. Remain Indicator
7. Timer Play Indicator
8. CD Indicators
9. Cassette Indicator
10. Sleep Indicator
11. Timer Recording Indicator
12. All Disc Play Indicator
13. Level Meter
14. FM Stereo Mode Indicator
15. CD Repeat Indicator
16. CD Pause Indicator
17. CD Play Indicator
18. FM Stereo Indicator
19. Tape Reverse Mode Indicator
Rear panel
1. FM/AM Antenna Jack
2. Auxiliary Input Jacks
3. Speaker Terminals
4. AC Power Cord
5. Transport Screw
3
4
5
1
2
1
2
3
4
5
6
7
8 9
10 11 12 13 14
15
16
17
18
19

CD-CH1500
– 4 –
CD-CH1500
CP-RW5500
Remote control
1. Remote Control Transmitter
2. Tuner (Band) Button
3. CD Button
4. Auxiliary Button
5. CD Direct Play Buttons
6. Memory Button
7. Clear Button
8. CD Track Down or Fast Reverse, Tape Fast Wind,
Tuner Preset Down Button
9. Enter Button
10. Stop Button
11. Menu Button
12. Control Panel Open/Close Button
13. Tape Button
14. Power Button
15. Time Button
16. FM Stereo Mode Button
17. Display Button
18. Dimmer Button
19. CD Play Mode Select Button
20. CD Track Up or Fast Forward, Tape Fast Wind,
Tuner Preset Up Button
21. CD Play or Pause, Tape Play Button
22. Tape Record Pause Button
23. Tape Reverse Mode Select Button
24. Equalizer Mode Select Button
25. Extra Bass Button
26. Volume Up or Down Buttons
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
✱
✱
✱
Buttons with “✱” mark in the illustration can be operated on the
remote control only.
Other buttons can be operated both on the main unit and the remote
control.
1. Woofer
4. Subwoofer Terminals
2. Tweeter
5. Main Speaker Terminals
3. Subwoofer
6. Bass Reflex Duct
1
2
3
4
5
6

– 5 –
CD-CH1500
OPERATION MANUAL
To confirm the time display:
[When the unit is in the stand-by mode]
Press the DISPLAY button on the remote control.
The time display will appear for about 3 seconds.
[When the power is on]
Press the MENU button.
The time display will appear for about 10 seconds.
Note:
“CLOCK” will appear or time will flash at the push of the DISPLAY button when the AC
power supply is restored after a power failure or unplugging the unit.
Reset the clock as follows.
To reset the clock:
[When time is flashing]
1. Press the POWER button.
2. Press the MENU button.
3. Press the ENTER button.
4. Perform “Setting the Clock” from step 5.
[When “CLOCK” appears]
Perform “Setting the Clock” from the beginning.
To change the 24-hour or 12-hour display:
1. Clear all the programmed contents.
[Refer to “Clearing all the memory (reset)”.]
2. Perform “Setting the Clock” from the beginning.
Setting the Clock
In this example, the clock is set for the 12-hour (AM12:00) display.
1 Press the POWER button to turn the power on.
2 Press the MENU button.
3 Turn the jog dial to select “CLOCK” and within 10 seconds, press
the ENTER button.
4 Turn the jog dial to select the 12-hour or 24-hour display and
within 2 minutes, press the ENTER button.
5 Turn the jog dial to adjust the hour and within 2 minutes, press
the ENTER button.
When the 12-hour display is selected, “AM” will change automatically to “PM”.
6 Turn the jog dial to adjust the minutes and within 2 minutes, press
the ENTER button.
The hour will not advance even if minutes advance from “59” to “00”.
The clock starts from “0” second. (Seconds are not displayed.)
The time display will disappear after a few seconds.
“AM 12:00”→ The12-hour display willappear. (AM12:00- PM 11:59)
“AM 0:00” → The12-hour display willappear.(AM0:00- PM 11:59)
“0:00” →The 24-hour display will appear. (0:00 - 23:59)
Note that this can only be set when the unit is first installed or it has been reset.
[Refer to “Clearing all the memory (reset)”.]
Troubleshooting Chart
Many potential “problems” can be resolved by the owner without calling a service tech-
nician.
If something is wrong with this product, check the following before calling your autho-
rized SHARP dealer or service center.
TunerSymptom
Radio makes unusual noise con-
secutively.
Remote control
Symptom
The remote control does not op-
erate.
Possible cause
Is the unit placed near the TV or com-
puter?
Isthe FM/AMloop antenna placedprop-
erly?
Move the AC power cord away from the
antenna if located near.
Possible cause
Isthe ACpower cordof theunit plugged
in?
Is the battery polarity correct?
Are the batteries dead?
Is the distance or angle incorrect?
Does the remote control sensor receive
strong light?
General
Symptom
The clock is not on time.
Whena buttonis pressed,the unit
does not respond.
No sound is heard.
Possible cause
Did a power failure occur?
Reset the clock.
Set this unit to the power stand-by
mode and then turn it back on.
If the unit still malfunctions, reset it.
Is the volume level set to “0”?
Are the headphones connected?
Are the speaker wires disconnected?
Cassette deck
Symptom
Cannot record.
Cannot record tracks with proper
sound quality.
Cannot erase completely.
Sound skipping.
Cannot hear treble.
Sound fluctuation.
Cannot remove the tape.
Possible cause
Is the erase-protection tab removed?
Is it a normal tape?
(You cannot record on a metal or CrO2
tape.)
Isthere any slack?Isthe tapestretched?
Are the capstan, pinch rollers, or heads
dirty?
Ifa power failureoccursduring playback,
theheads remain engagedwiththe tape.
Do not open the compartment forcibly.
Wait until electricity resumes.
CD player
Symptom
Playback does not start.
Playback stops in the middle or is
not performed properly.
Playback sounds are skipped, or
stopped in the middle of a track.
Possible cause
Is the disc loaded upside-down?
Does the disc satisfy the standards?
Is the disc distorted or scratched?
Istheunitlocated near excessivevibrations?
Is the disc very dirty ?
Has condensation formed inside the
unit?
Condensation
Sudden temperature changes, storage or op-
erationin anextremely humidenvironment may
cause condensation inside the cabinet (CD
pickup, tape heads, etc.) or on the transmitter
on the remote control.
Condensationcan causetheunit tomalfunction.
If this happens, leave the power on with no disc
(or cassette) in the unit until normal playback is
possible (about 1 hour). Wipe off any conden-
sation on the transmitter with a soft cloth before
operating the unit.

CD-CH1500
– 6 –
Troubleshooting Chart
If trouble occurs
When this product is subjected to strong external interference (mechanical shock, ex-
cessive static electricity, abnormal supply voltage due to lightning, etc.) or if it is oper-
ated incorrectly, it may malfunction.
If such a problem occurs, do the following:
1. Set the unit to the stand-by mode and turn the power on again.
2. If the unit is not restored in the previous operation, unplug and plug in the unit, and
then turn the power on.
Clearing all the memory (reset)
If neither operation above restores the unit, clear
all the memory by following the instructions be-
low.
1. Press the POWER button to enter the power
stand-by mode.
2. While pressing down the VOLUME button,
press the POWER button until “ALL CLEAR” ap-
pears.
Caution:
This operation will erase all data stored in memory including clock, timer settings,
tuner preset and CD program.
Before transporting the unit
On the back of this unit is equipped with a transport
safety screw in order to prevent damage during trans-
portation.
1. Press the POWER button to turn the power on.
2. Remove all discs from the unit, close the disc
tray.
“CD NO DISC” is displayed.
3. Press the POWER button to enter the stand-by
mode.
“GOOD-BYE” is displayed.
4. When “GOOD-BYE” disappears, unplug the AC
power cord from the AC outlet.
5. Insert the transport safety screw into the back
of the unit and tighten it with a flat-blade screw-
driver.
Notes concerning use:
Replace the batteries if the operating distance is reduced or if the operation be-
comes erratic.
Periodically clean the transmitter on the remote control and the sensor on the ste-
reo system with a soft cloth.
Exposing the sensor on the stereo system to strong light may interfere with opera-
tion. Change the lighting or the direction of the stereo system.
Keep the remote control awa
y
from moisture, heat, shock, and vibrations.
Test of the remote control
Face the remote control directly to the remote sensor on the unit.
The remote control can be used within the range shown below:
Press the POWER button. Does the power turn on? Now, you can enjoy the music.
8" - 20'
(0.2 m - 6 m)
Remote Control
Remote sensor

– 7 –
CD-CH1500
Accessories
Accesorios
1
1
123
2
2
FM/AM loop antenna × 1
Antena de cuadro de FM/AM
×
1
Remote control × 1
Controlador remoto
×
1
Blue Azul
Black Negro
Black Negro
Red Rojo
Speaker wire for
MAIN terminals ×2
Cable del altavoz para
los terminales MAIN
×
2
Speaker wire for
SUBWOOFER terminals ×2
Cable del altavoz para los
terminales SUBWOOFER
×
2
Battery Installation of the Remote Control Instalación de las pilas del controlador remoto
Use 2 “AA” size batteries (UM/SUM-3, R6, HP-7 or similar). Batteries are not included.
Use dos pilas del tamaño“AA” (UM/SUM-3, R6, HP-7 o equivalentes). Las pilas no están incluidas.
Remove the
Insert the batteries
Replace the cover.
battery cover.
as shown.
Extraiga la cubierta Inserte las pilas Vuelva a colocar la
de las pilas. como se muestra. cubierta.
,
,, ,,
,
,, ,,
,,,, ,,,, ,,,,
,
,,
,,, ,,,
,,, ,,,
,,,,,, ,,,,,,
System Connections
Conexiones del sistema
3
3
FM antenna Antena de FM
AM loop antenna Antena de cuadro de AM
Blue Azul
Red Rojo
Black Negro
Right speaker
Altavoz derecho
Left speaker Altavoz izquierdo
AC outlet (AC 120 V, 60 Hz) A un tomacorriente de CA
(120 V de CA, 60 Hz)
Right speaker
Altavoz derecho
Left speaker
Altavoz izquierdo
RCA cord (not supplied) Cable RCA (no
suministrado)
To the line output jack A la toma de salida de línea
VCR, DVD, etc.
Videograbadora
,
DVD, etc.
TV TV
Before turning the power on, be sure to re- movethistransport screw on the backofthe unit using a flat-blade screwdriver or a coin. This screw is required when transporting the unit again. Please keep it. Antes de conectar la alimentación,
asegúrese de extraer este tornillo para el
transporte de la parte posterior del aparato
empleandoun destornilladorde puntaplana
o una moneda.
Este tornillo es necesario cuando el aparato
se transporta de nuevo. Gu r
ádelo.

CD-CH1500
– 8 –
Listening to a CD (CDs) Audición de un disco CD (discos CD)
Turning on Your System Conexión de la alimentación de su sistema
4
4
The first time the unit is plugged, the unit will enter the demonstra- tion mode. You will see words scroll.
Cuando se enchufe por primera vez
elaparato,se estableceráenel modo
de demostración. Verá un desplaza-
miento de palabras.
12
Press the DEMO button to cancel the demonstration mode.
Pulse el botón DEMO
para cancelar el modo
de demostración.
Press the POWER button to turn the power on.
Pulse el botón POWER
para conectar la
alimentación.
1
Press the CD button. Pulse el botón CD.
2
Press the DISC 1 button to open the disc tray 1.
Pulse el botón DISC 1 para abrir la
bandeja del disco 1.
3
Place a CD on the disc tray 1, label side up. Coloque un disco compacto en la bandeja
del disco 1, con el lado de la etiqueta
arriba.
4
Press the DISC 1 button to close the disc tray 1. Pulse el botón DISC 1 para cerrar la
bandeja del disco 1.
5
You can place discs on the trays 2 - 6 by following steps 2 - 4.
Podrá colocar discos en las bandejas 2 - 6
según los pasos 2 - 4.
6
Press the button to start playback. Pulse el botón para iniciar la
reproducción.
5” (12 cm) 12 cm
3” (8 cm) 8 cm
Listening to the Radio Audición de la radio
1
Press the TUNER (BAND) button repeat- edly to select the desired frequency band (FM or AM). Pulse repetidamente el botón TUNER
(BAND) para seleccionar la banda de
frecuencia deseada (FM o AM).
2
Press the TUNING ( or ) button to tune in to the desired station. Pulse el botón TUNING ( o ) para
sintonizar la emisora deseada.
To receive an FM stereo transmission: Press the ST-MODE button on the remote control to display the “ST” indicator.
Para recibir una transmisión de FM en estéreo, pulse
el botón ST-MODE del controlador remoto para que
se encienda el indicador “ST” .
Listening to a Cassette Tape Audición de un cassette
1
Press the TAPE button. Pulse el botón TAPE.
2
Open the cassette door by pushing the area marked “PUSH EJECT ”.
Abra la puerta del cassette pulsando la
parte marcada “PUSH EJECT ”.
3
Load a cassette into the compartment with side A facing you. Inserte un cassette en el compartimiento
del cassette.
4
Press the REVERSE MODE button to choose one side or both side. Pulse el botón REVERSE MODE para
seleccionar una cara o ambas caras.
... To listen to both sides.
Para escuchar ambas caras.
...
For repeat play of both sides. Para repetir ambas caras.
... To listen to one side.
Para escuchar una cara.
5
Press the button to listen to side A, or the button for side B. Pulse el botón para escuchar la cara
A, o el botón para la cara B.
PUSH EJECT

– 9 –
CD-CH1500
1 Top Cabinet 1. Screw ................ (A1) x5 9-1
2 Side Panel 1. Screw ................ (B1) x8 9-1
(Left/Right)
3 Rear Panel 1. Screw ................ (C1) x3 9-2
2. Screw ................ (C2) x6
4 Front Panel 1. Flat Cable.......... (D1) x1 9-2
2. Screw ................ (D2) x5
3. Socket ............... (D3) x6
5 Sub Trans PWB 1. Screw ................ (E1) x3 9-2
2. Socket ............... (E2) x5
6 Main PWB 1. Flat Cable.......... (F1) x1 9-2
2. Screw ................ (F2) x2
3. Screw ................ (F3) x1
4. Socket ............... (F4) x3
7 Power PWB/ 1. Socket ............... (G1) x1 10-1
Speaker PWB 2. Screw ................ (G2) x2
8 Tape Mechanism 1. Open the cassette holder. 10-2
2. Screw ................ (H1) x4
9 CD Switch PWB 1. Socket ............... (J1) x1 10-2
2. Screw ................ (J2) x6
3. Hook .................. (J3) x2
10 Switch PWB 1. Screw ................ (K1) x1 10-2
2. Hook .................. (K2) x1
11 Headphones PWB 1. Screw ................ (L1) x1 10-2
2. Bracket .............. (L2) x1
12 CD Changer Door 1. Screw ................ (M1) x3 10-2
Panel/Control Panel 2. Screw ................ (M2) x2
13 Motor PWB 1. Solder................ (P1) x2 10-2
14 CD Changer Door 1. Screw ................ (Q1) x4 10-3
Panel
15 Control Panel 1. Screw ................ (R1) x6 10-3
16 Control PWB 1. Screw ................ (S1) x5 10-4
2. Socket ............... (S2) x1
17 Jog PWB 1. Knob .................. (T1) x1 10-4
2. Screw ................ (T2) x5
18 LED B PWB 1. Screw ................ (U1) x3 10-4
19 Cassette Holder 1. Open the cassette holder cover. 10-5
Cover 2. Screw ................ (V1) x4
3. Display Panel ....(V2) x1
4. Hook .................. (V3) x4
20 Display PWB/ 1. Screw ................ (W1) x4 10-6
LED A PWB 2. Hook .................. (W2) x2
DISASSEMBLY
STEP REMOVAL PROCEDURE FIGURE
CD-CH1500
CD-CH1500
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.Takeoff nylon bandsorwireholders where theyneedto
beremovedwhendisassemblingtheunit.Afterservicing
theunit,besure to rearrangetheleads where they were
before disassembling.
4. Take sufficient care on static electricity of integrated
circuits and other circuits when servicing.
Front Panel Top Cabinet
Side Panel(Right)
Side Panel
(Left)
Rear Panel
(B1)x4
ø3x10mm
(A1)x2
ø3x16mm
(B1)x4
ø3x10mm
(A1)x1
ø3x10mm
(A1)x2
ø3x16mm
(C2)x6
ø3x10mm
Main PWB
Front Panel
Tape Mechanism PWB
(D3)x2
Speaker
PWB
(C1)x1
ø3x10mm
(F2)x2
ø3x10mm
(C1)x2
ø3x10mm
Rear
Panel
(D2)x2
ø3x8mm
(F3)x1
ø3x8mm
(F4)x1
(F1)x1
(D1)x1
CD PWB
Power PWB
Power PWB
(F4)x1
(F4)x1
Main
PWB
(D2)x1
ø3x8mm
(E1)x3
ø3x8mm
(D3)x4
(D2)x1
ø3x8mm
(E2)x2
(E2)x3
Power PWB
Main PWB
Sub Trans
PWB
Lug Wire
Speaker
PWB
(D2)x1
ø3x8mm
Figure 9-1
Figure 9-2

CD-CH1500
– 10 –
(V1)x4
ø2.6x12mm
Front Panel
(V2)x1
(V3)x4
Open Cassette
Holder Cover
(W1)x4
ø3x14mm
(W2)x1
LED A
PWB
Cassette
Holder Cover
Display PWB
(W2)x1
(G2)x1
ø3x10mm
(G2)x1
ø3x10mm
(G1)x1
Power PWB
Speaker
PWB
CD Changer
Block
Main
Chassis
(J2)x6
ø3x10mm
(M2)x1
ø3x20mm
(H1)x4
ø3x10mm Tape
Mechanism
Front Panel Cassette
HolderOpen
(J1)x1 (J3)x1
(J3)x1
Switch PWB
Headphones
PWB
(L2)x1
(M1)x3
ø3x10mm
(K1)x1
ø2.6x10mm (L1)x1
ø3x10mm
CD Changer
Door Panel
Motor
PWB
(P1)x2
CD Switch
PWB
(M2)x1
ø3x20mm
(K2)x1
(R1)x2
ø2.6x12mm
(Q1)x1
ø2.6x10mm
(Q1)x1
ø2.6x10mm
(Q1)x2
ø2.6x10mm
(R1)x2
ø2.6x12mm
(R1)x2
ø2.6x12mm
CD Changer
Door Panel
Control Panel
(S1)x5
ø2.6x10mm
(S2)x1
(U1)x2
ø2.6x10mm
(U1)x1
ø2.6x10mm
(T2)x5
ø2.6x10mm
Control Panel B
Control PWB
Control Panel A
LED B PWB
LED Holder
Jog PWB
(T1)x1
Figure 10-1
Figure 10-2
Figure 10-3
Figure 10-4
Figure 10-5
Figure 10-6

– 11 –
CD-CH1500
1 Front Panel 1. Net...................... (A1) x1 11-3
2. Catching Holder . (A2) x4
3. Screw ................. (A3) x4
2 Woofer/Sub Woofer 1. Screw ................. (B1) x8 11-4
3 Tweeter 1. Screw ................. (C1) x2 11-4
STEP REMOVAL PROCEDURE FIGURE
CP-RW5500
(X3)x3
ø3x10mm
(X2)x1
ø3x10mm
Bottom Side
CD Changer
Mechanism Front Side
(X2)x1
ø3x10mm
(X3)x2
ø3x10mm Main Chassis
CD PWB
(X1)x1
1 Top Cabinet 1. Screw................. (A1) x5 9-1
2 Side Panel 1. Screw................. (B1) x8 9-1
(Left/Right)
3 Rear Panel 1. Screw................. (C1) x3 9-2
2. Screw................. (C2) x6
4 Front Panel 1. Flat Cable ..........(D1) x1 9-2
2. Screw................. (D2) x5
3. Socket................ (D3) x6
5 CD Changer 1. Flat Cable .......... (X1) x1 11-1
Mechanism 2. Screw................. (X2) x2
3. Screw................. (X3) x5
6 CD Servo PWB 1. Screw................. (Y1) x4 11-2
(Note) 2. Socket................ (Y2) x4
3. Flat Wire ............ (Y3) x2
7 CD Mechanism 1. Screw................. (Z1) x4 11-2
STEP REMOVAL PROCEDURE FIGURE
CD-CH1500 (CD CHANGER MECHANISM UNIT)
Note:
After removing the connector for the optical pickup from the
connector, wrap the conductive aluminium foil around the
front end of connector remove to protect the optical pickup
from electrostatic damage.
(Y1)x4
ø3x10mm (Y3)x1
(Y2)x1
(Y2)x1
(Y3)x1
(Y2)x2
(Z1)x4
ø2.6x10mm
CD Servo PWB
CD Changer
Mechanism
CD Mechanism
Figure 11-1
Figure 11-2
Figure 11-3
Figure 11-4
(A2)x4
(A1)x1
Front Panel
(A3)x4
ø3x12mm
Tweeter
Woofer
Sub Woofer
(C1)x2
ø3x10mm
(B1)x4
ø4x16mm
(B1)x4
ø4x16mm

CD-CH1500
– 12 –
REMOVING AND REINSTALLING THE MAIN PARTS
TAPE MECHANISM SECTION
Perform steps 1 to 4 and 8 of the disassembly method to
remove the tape mechanism.
How to remove the record/playback and erase
heads (See Fig. 12-1)
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.
How to remove the pinch roller (See Fig. 12-2)
1. Carefully bend the pinch roller pawl in the direction of the
arrow <A>, and remove the pinch roller (B1) x1 pc., in the
direction of the arrow <B>.
Note:
When installing the pinch roller, pay attention to the spring
mounting position.
How to remove the belt (See Fig. 12-3)
1. Remove the motor.
2. Remove the main belt (C1) x 1 pc., from the motor side.
3. Remove the FF/REW belt (C2) x 1 pc.
How to remove the motor (See Fig. 12-4)
1. Remove the belt.
2. Remove the screws (D1) x 2 pcs., to remove the motor.
(A1)x2
Ø2 x 6mm
Record/
Playback
Head
Erase
Head
Pinch
Roller
(B1)x1 <A>
Pinch
Roller
Pawl
Pull
<B>
Pull
(Left)
<A>
Pinch
Roller
Pawl
Pull
<B> Pull
(Right)
Main Belt
(C1)x1
FF/REW Belt
(C2)x1
Motor
(D1)x2
Ø 2.6 x 5mm
Motor
Figure 12-1
Figure 12-2
Figure 12-3
Figure 12-4

– 13 –
CD-CH1500
SW756 PLAY/PAUSE ON—OFF
SW757 STOP ON—OFF
SW758 PLAY ON—OFF
SW761 AUX ON—OFF
SW762 TUNER ON—OFF
SW763 TAPE ON—OFF
SW764 CD ON—OFF
SW772 EQUALIZER MODE ON—OFF
SW773 X-BASS ON—OFF
SW778 ENTER ON—OFF
SW783 PLAY MODE ON—OFF
SW784 DISPLAY ON—OFF
SW786 MENU ON—OFF
SWB101 DISC DETECT 1 ON—OFF
SWB102 DISC DETECT 2 ON—OFF
SWB103 DISC DETECT 3 ON—OFF
SWB104 MODE 1 ON—OFF
SWB105 MODE 2 ON—OFF
SWB106 MODE 3 ON—OFF
SWB107 MODE 4 ON—OFF
SWB108 MODE 5 ON—OFF
SWB109 TRAY 1 ON—OFF
SWB110 TRAY 2 ON—OFF
•The indicated voltage in each section is the one measured
by Digital Multimeter between such a section and the chas-
sis 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 “ 1” ( ) 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.
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 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.
NSW1 PICKUP IN ON—OFF
SW701 POWER ON—OFF
SW705 OPEN/CLOSE ON—OFF
SW710 PANEL OPEN/CLOSE ON—OFF
SW711 VOLUME DOWN ON—OFF
SW712 VOLUME UP ON—OFF
SW720 CD 1 EJECT ON—OFF
SW721 CD 2 EJECT ON—OFF
SW722 CD 3 EJECT ON—OFF
SW723 CD 4 EJECT ON—OFF
SW724 CD 5 EJECT ON—OFF
SW725 CD 6 EJECT ON—OFF
SW730 CD 1 PLAY ON—OFF
SW731 CD 2 PLAY ON—OFF
SW732 CD 3 PLAY ON—OFF
SW733 CD 4 PLAY ON—OFF
SW734 CD 5 PLAY ON—OFF
SW735 CD 6 PLAY ON—OFF
SW750 R-MODE ON—OFF
SW751 CLEAR ON—OFF
SW752 MEMORY ON—OFF
SW753 FAST REVERSE ON—OFF
SW754 FAST FORWARD ON—OFF
SW755 TAPE RECORD ON—OFF
REF. NO DESCRIPTION POSITION POSITIONREF. NO DESCRIPTION
TYPES OF TRANSISTOR AND LED
ECB
(S)(G)(D)
FRONT
VIEW
FRONT
VIEW
BCE
FRONT
VIEW
2SA562 Y
2SA1015 GR
2SB561 C
2SB562 C
2SC1740 R
DTC363 TS
KRA102 M
KRA107 M
KRC102 M
2SD2012 HLMP1700
K5052UL
LNG995PF
L934MBC5
SVC211C
SVC348S
1 2 3
(1) (2) (3)
KRC104 M
KRC107 M
KTA1046 Y
KTA1266 GR
KTC2026
KTC3194 Y
KTC3199 GR
KTC3203 Y

CD-CH1500
– 14 –
TOMAINPWB
(IC901)
LASER
DRIVER
Q5
TRACKING COIL
FOCUS COIL
PICKUP UNIT
KEY
SWB101-SWB110
Q1
Q3
Q4
IC2
TC9490F
SERVO/SIGNAL
CONTROL
X1
16.934MHz
IC6
TA2147F
SERVO PRE
AMP.
CNP1
IC5
BA5939S
FOCUS/TRACKING/
SPIN/SLED DRIVER
NSW1
PICKUP IN
NM2
SLED
MOTOR
NM1
SPINDLE
MOTOR
MOB1
MAIN CAM
MOTOR
MOB2
TRAY
MOTOR
+3.3V
21 20 19 18 17 16 15 14 13 12 11 10
987654321
/RST
GND
BUS1
T-MO_REV
T-MO_FOR
BUS3
BUCK
/CCE
CD/CD-RW_SEL
CD FUNC
33 32 31 30 29 28 27 26 25 24 23 22
PU-IN
CD_R-CH
CD_L-CH
CD_+B CD_+B
A_GND
C-MO_REV
C-MO_FOR
CD_GND CD_GND
BUS0 BUS2
CD-RW
CANB_B
CANA_E
CANA_C
CANA_A
TRAY_A
TRAY_C
TRAY_B
CANA_B
CANA_D
CANB_A
DVDD
DVSS
XI
XO
XVDD
XVSS
TESIN
DVSS
DVDD
SEL
VREF
DMO
AVDD3
FMO
TEBC
RFGC
TRO
FOO
SBAD
31 30 29 28 26
25
24
22
13
20 19 18
TEI
FEI
RFRP
RFI
PVREF
LPFO
LPFN
TMAX
AVSS
AVDD
RFCT
16
7
PDO
PVDD
DVSS
DVDD
/HSO
61 64
63
62
60
59
58
57
56
54
53
51 50
49
/RST /CCE BUCK
VSS
VDD BUS3 BUS2 BUS1 BUS0
DVSS
LO
RO
24
23
22
21
20
19
18
17
15
14
13
12 11
9 8 7 6 5 4 3 2 1
GND RFN RFO AGCI
RFGO
RFIS RFRP
FEO VRO
GVSW SBAD
TEO
RFGC
TEB
SEL
FNI
FPI
TPI
TNI
MDI
LDO
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
M
MM
M
TR+
FO+
TR–
SL+
SL–
SP–
SP+
FO–
+5V
VCC
17
3.3V
CONSTANT
VOLTAGE
SWITCHING
48
47
46
45
44
43
42
41
40
39
15
6
38
37
36
35
34
33
POWVCC PREVCC LOADING1 VCC LOADING2 VCC POWVCC PREVCC MUTE
+5V
+5V
Figure 14 BLOCK DIAGRAM (1/6)

– 15 –
CD-CH1500
TOMAINPWB
ABCD
+B
+B
+B +B
+B
+B
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
10
1
2
3
4
5
6
7
8
9
11
12
13
14
15
AC POWER
SUPPLY
CORD
+B
MAIN
MAIN
SUB
WOOFER
+B
+B
IC802
SO201
BI950A
TOMAINPWB BI960
6
IC808
TF
SP L-CH
SP R-CH
GND
SP R-CH
SP L-CH
GND
SP L-CH
SP L-CH
GND
SP R-CH
SP R-CH
GND
M
+
+B
-B
-B
-B
+B
FAN MOTOR DRIVER
RELAY
DRIVER
MICON +5V
+B
+B
+B
-B
-B
-B
+B
-B
+B
-B
+B
+B
+B
VOLTAGE
REGULATOR
VOLTAGE
REGULATOR
VOLTAGE
REGULATOR
-B
HIGH
LOW
Q200
CNP807
Q210
Q212
Q211
IC808
KIA7805AP
CONSTANT VOLTAGE
REGULATOR
F807
5A/125V
RY801
SO201
SPEAKER
TERMINALS
RY202
Q209
RY201
Q810
Q805
CNP806
F808
2.5A/125V
Q806
IC202
STK40204(2Ch)
POWER AMP.
Q204
Q203
Q208
Q207
Q206
Q201 Q813 Q812
IC201
STK40271(2Ch)
POWER AMP.
Q205
F801
2.5A/125V
F804
5A/125V
F803
5A/125V
F806
4A/125V
D816
D817
F805
4A/125V
T802
SUB POWER
TRANSFORMER
Q807
Q809
IC802
KIA7810AP
VOLTAGE
REGULATOR
I C203
KIA4558P
OPE AMP.
T801
MAIN POWER TRANSFOMER
MO200
FAN
MOTOR
Q202
M+10V
D812~D815
D804~D807
A_+10V
A_GND
M_+10V
BIAS_GND
TO DECK SECTION
D_GND
FAN_CTL
D_GND
-8V
AC_RLY CTL
UN_SW 5V
SP_RLY
SP_DET
8
3 4 6
1 72 5
CD_GND
M_GND
CD_+B
M_10V A_GND
A_+10V
M_10V
M_GND
CD_GND
CD_+B
A_GND
A_+10V
A_GND2
R-CH
L-CH
15
14
13
12
11
98
6 7
5
43
2
1
10
+
+
––
–Vcc
+Vcc
Ch1 Ch2
Ch2
Out
Out
Ch1
8
7
5
4
32
1
+ +
–
–
3 2 1
Out
Ch2
Out
Ch2
Ch2
Ch1
–
–
+
+
+Vcc
–Vcc
AC 120V,
60Hz
3 2 1
-
+
+
-
+
-
+
-
JK701
HEADPHONES
MICON +5V
Figure 15 BLOCK DIAGRAM (2/6)

CD-CH1500
– 16 –
Figure 16 BLOCK DIAGRAM (3/6)
1
1
12
12
11
12
10
9
8
7
6
5
4
3
2
1
ghi
TOCDPWB
OQPXYUVWTRSd fcba
TOPOWER
PWB
+B
IC905
CNP806
3
2
1
1
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
VOL
T
X902
32.768kHz
Q909
Q908
Q907
Q906
Q905
IC905
KIA7042AP
RESET
Q901
X901
600kHz
CNP970
FFC970
IC901
IX0417AW
SYSTEM
MICROCOMPUTER
B
CNP901
33
32
31
30
29
28
27
26
25
24
23
22
FH_A-SW_A
FH_T-SW_C
FH_T-SW_B
FH_T-SW_A
FH_A-SW_B
FH_A-SW_C
FH_A-SW_D
FH_A-SW_E
FH_C-SW_A
FH_C-SW_B
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
CD_BUS3
CD_BUCK
CD_CCE
CD_RES
CD_BUS2
CD-RW
CD_BUS1
T-MO_REV
CD_BUS0
T-MO_FOR
CD_L
PU-IN
A_GND
C-MO_REV
CD_R
C-MO_FOR
CD_GND
CD_GND
CD_+B
CD_+B
M
SOLENOID
+
–
2
1
3
4
5
6
7
8
9
10
11
12
F_REC
R_REC
CST_SW
NC
NC
–COM
+MTR
+5V SENSOR
SENSOR OUT
+SOL
M_+B
M_GND
CD_+B
CD_GND
A_+10V
A_GND
L CH
R CH
A_GND
A_+10V
A_GND
CD_+B
CD_GND
M_GND
M_+B
A_-B AUX_SEL
L_CH
R_CH
A_GND2
C2B_CL C2B_DO C2B_CE C2B_DI S-MUTE VSM
TO AUDIO SECTION
TO AUDIO SECTION
D_GND A_+B PB_MUTE CD_MUTE CD-R_SEL
A_GND
CD_R
CD_L
TO AUDIO SECTION
SIDE-A
SIDE-B
CST-SW
LEVEL_L LEVEL_R
51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79
40
41
42
43
44
45
46
47
48
49
50
31
32
33
34
35
36
37
38
39
9 8 7 6 5 4 3 2
CD RE
CD
C
83 FH T-SW C
82 FH T-SW B
81 FH T-SW A
LCD E
FH A-SW B
FH
M
CD MUTE
FH M
FH
M
FH
M
AVref1 AVSS
Vref 0
AVDD A
CD
RESET
XT1
XT2
VSS
X1
X2
VDD
TIMER LCD
30 LCD R/W
29 LCD RS
28 POWER RLY
27 N.C.
26 LCD DB7 CD PIC
K
TEST/Vpp
LCK2 LCK1
VDD
DEST_OUT2
V
FH C-
S
FH C-
S
FH A-SW E
FH A-SW D FH A-SW C
CD B
U
CD B
CD B
JOG-B
KEY 4
KEY 3 KEY 2 KEY 1
KEY 0
BACK LED CONT
LCD DB6 LCD DB5
3 REC BIAS
2 REC
1 PB MUTE
LCD DB4
DATA
JOG-A
CST SW
CAM SW
B-FP SW A-FP SW
DEST_OUT1
REMOCON
VSM
PROTECT
C FUTA OP
SPAN
CD B
U
C FUTA CL
SYS MUTE
CD B
REC M
DEST_IN
CE
LCD-RW LCD-E TUNER DI TUNER DO TUNER CL
CLK
RUN PULSE
T-SOL
T-MOTOR
CAM-SW
RUN_PUL
MOTOR
SOL
PLAY SW
TAPE
MOTOR
1 2 3 4 5 6 7 8 9
101112131415
30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
49 SP RLY
50 POWER KEY
NC
NC
GND
PLAY
SWITCH
SOLENOID DRIVER
RUN PULSE
MOTOR DRIVER
SYS STOP
+5V

– 17 –
CD-CH1500
Figure 17 BLOCK DIAGRAM (4/6)
+B
8 7 6 5 4 3 2 1
TOPOWERPWB
TOPOWER
PWB
IC913
CNP102
CNP807
N
P806
3
2
1
+B
+B
+B
+B
+B
B
SW750~SW758
KEY0
Q954
Q955
IC701
TA7291S
LOADING
MOTORDRIVER
1 2 3 4 5 6 7 8 9
IC913
KIA7805AP
VOLTAGE REGULATOR
BI940
CNS940
BI950
BI960
IC912
BU2092F
INPUT/OUTPUT
EXPANDER
CNP934
CNP931
+B
REC_RCH REC_LCH
A_GND
TAPE_L TAPE_R
TO AUDIO SECTION
TAPE_R
TAPE_L
A_GND REC_LCH REC_RCH
REC_MUTE REC_CONT REC_BIAS
l
8 7 6 5 4 3 2 1
POWER_RLY
SP_RLY
PROTECT
FAN
D_GND
SP_DET
SP_RLY
UN_SW 5V
AC_RLY CTL
A_-B
D_GND
FAN_CTL
1 2 3 4 5 6 7 8
M_+B
M_GND
CD_+B
CD_GND
CD_+B
CD
_
GND
M_GND
M_+B
PNL_OP
PNL_CL
D GND
A +B
SDA
SCL
D +B
D_GND
KEY4
KEY3
KEY2
JOG-B
JOG-A
A_+B
7
6
5
4
3
2
1
D_+B
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
CD-R_SEL
SW12
LCK SW10
SW11
SW5
SW7
SW8
SW9
VSS
DATA
CLK
VDD
OE
A_+B
D_+B
D_GND
REMOCON
POW_KEY
KEY0
KEY1
LCK
CK
DATA
POW_IND
11
10
9
8
7
6
5
4
3
2
1
LEVEL_R
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
2
73 74 75 76 77 78 79 80
8 7 6 5 4 3 2 1
CD RESET
CD CCE
C
B
A
FH A-SW B
FH M B-
FH A-SW A
FH M B+
FH M A-
FH M A+
CD RW
CD PICK IN
DEST_OUT2
VSS
FH C-SW B
FH C-SW A
FH A-SW E
FH A-SW D FH A-SW C
CD BUS3
CD BUS2
CD BUS1
B
IAS
UTE
DEST_OUT1
CD BUCK
CD BUS0
REC MUTE
LCD-RW LCD-E
RUN PULSE
T-SOL
T-MOTOR
CD-SW
NC
NC
NC
m
j
km
8 9
101112131415
IC701
+B
SW711,SW712,
SW720~SW725
Q724 Q720
Q721
Q723
Q725
Q722
SW710,
SW730~SW735
LED759
LED731
LED754
LED756
LED757
LED758
LED755
SW701
POWER
RX701
REMOTE
SENSOR
LED770
JOG701
JOG DIAL
SW761~SW764
Q708
LED772~
LED776
SW770,SW772,
SW773,SW778,
SW784,SW786
CNS720
CNS770
IC702
INPUT/OUTPUT
EXPANDER
BU2092F
LED_4
LED_1
LED_2
LED_3
LED_5
LED_6
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Q10
VDD
__
OE
Q11
Q9
Q8
Q7
Q6
Q5 Q3
Q4
Q2
Q1
Q0
LCK
CLOCK
VSS
POW_IND
DATA
CK
LCK
KEY1
POW_KEY
REMOCON
D_GND
D_+B
A_+B
LED_EG
LED_5
LED_4
LED_3
LED_2
LED_1
A_+B
JOG-A
JOG-B
KEY2
KEY3
KEY4
D_GND
32
1
5
6
7
8
9
10
11
1
2
3
4
4
3
6
7
5
2
1
DATA
+B
+B
+B
+B
+B
+B
5
1
CNP701
Q707
LED735,
LCD720 LCD DISPLAY
LED737,LED738
5
1
2
3
4
VDD
VSS
VLCD
SW705
OPEN/CLOSE
MO700
CONTROL
PANEL MOTOR
MOTOR_–
MOTOR_+
D_GND
CLOSE_SW
OPEN_SW
M
DIMMER
+B

CD-CH1500
– 18 –
Figure 18 BLOCK DIAGRAM (5/6)
TP301
FM
AM
AMIF
FMIF
FMOSC.
SWITCHING
FMRF
OSCBUFF
SWITCHING
SWITCHING
T311
AC BIAS
ERASE
HEAD
L-CH
R-CH
P.B
REC
RECORD/
PLAYBACK
HEAD
9
7
4
3
1
X351
456kHz
IC303
LA1832S
CF351
FMIF
T351
CF352
Q351
CF302
AM
ANTENNA AMOSC.
VD301
BF301
T312
CNP303
L312
IC301
TA7358AP
FM FRONT END
VD302
Q371
Q360
IC302
LC72131
X352
4.5MHz
BAND
PASS
FILTER
VD303
Q302
VR351
FMMUTE
LEVEL
FM IF DET./FM MPX./AM IF
IC302
LC72131
PLL(TUNER)
T306
T306 FMIF
VT_CK
TUN_R
TUN_L
A_+B C2B_CE
C2B_CL
C2B_DI
C2B_DO
3
2
1
1
2
3
9
8
7
6
5
4
3
2
1
24
23
22
21
20
19
17
16
15
14
13 12
11
10
9
8
7
6
5
4
3
2
1
FM IF IN
AM MIX OUT
AM OSC OUT
FM AFC
AM OSC IN
AM RF IN
AM LOW CUT
VSM
FM/AM OUT
MPX
VCO
MPX IN
R-CH OUT
L-CH OUT
PHASE
(FM/AM)
PHASE
IF OUT
VCC
FM DET
STEREO
SD
GND
AM IF IN
REG
MO/ST
321
22
21
20
19
18
17
16
15
14
13
12 11
10
9
8
7
6
5
4
3
2
1
NC
MUTE
IO2
IF IN
X OUT
X IN
CE
CL
DI
DO
AM IN
FM IN
VDD
PD
AIN
AOUT
VSS
FM
MW
MO/ST
ST IND
NC
C2B_CL
C2B_DI
C2B_CE
C2B_DO
FM/AM
LOOP
ANTENNA
18
+B
+B
+B
A_+B
A_+B

– 19 –
CD-CH1500
Figure 19 BLOCK DIAGRAM (6/6)
H/N
P.B
REC
R REC L REC
POP REDUCE
R NF L NF
R NF L NF L R L R
20
7
18
817
13
21
45
23
22
69
16
1211
1
2324
VCC
AC BIAS
ERASE
HEAD
L-CH
R-CH
P.B
REC
REC MUTE
REC P.B
TOPOWER
SECTION
CNS940
Q119
Q120
IC102
BA3126N
HEAD
SELECTOR
Q101 Q102
CNP102
Q116
Q114 Q115
IC101
AN7345K
PLAYBACK AND
RECORD/PLAY BACK
AMP.
SWITCHING
BIAS
BIAS OSC.
SWITCHING
RECORD/
PLAYBACK
HEAD
9 5
7
6
8
4
3 2
1
REC_MUTE
REC_CONT
REC_L-CH
REC_R-CH
TAPE_R-CH
TAPE_L-CH
REC_BIAS
A_+10V
M_+10V
BIAS_GND
A_GND
L-CH
A
B
C
D
1
2
3
4
5
6
7
8
LR
FROMMAINPWB
A_GND
PB_MUTE
S-MUTE
C2B_DI C2B_CE C2B_DO
C2B_CL
D_GND
WU
VR
S
TO
TO MICOM SECTION
Q507
Q508
JK501
AUX IN
Q509
Q501
Q502
IC502
LC75341
AUDIO
PROCESSOR
IC503
NJM4558M
MOTORDRIVER
R-CH
L-CH
24
23
21
18
17 16
15
14
13
12
11 10
9
8
7
4
3
2
1
LSEL0
RSEL0
RIN
VDD
CLK
LIN
VSS
CE
DI
A_+B
A_-B
L_CH
TO MICOM
SECTION
C2B_DO
C2B_CL
C2B_DI
C2B_CE
CD
TUNER TAPE
AUX
REC_R-CH
TAPE_L
TO MICOM
SECTION
TO MICOM
SECTION
CD_L
8
7
5
4
3
1
a
d
f
g
k
l
+B
+B
-B
SWITCHING
SYSTEM
MUTE
REC_L-CH
REC_L-CH
L
R
L
R
L
R
L
R
L
R

CD-CH1500
– 20 –
Figure 20 SCHEMATIC DIAGRAM (1/11)
A
B
C
D
E
F
G
H
123456
• NOTES ON SCHEMATIC DIAGRAM can be found on page 13.
1
3
2
1
2
3
MAINPWB-A(1/3)
FM AM
AMIF
FMIF
FMOSC.
SWITCHING
AM TRACKINGfL
AMBAND
COVERAGEfL
FMRF
TP301
C319
0.1
2
1
3
C370
1/50
R327
33
C317
0.001
C316
0.1
R354
3.9K
R389
3.9K
L352
100µH
R391
390
R393
1K
R377
47K
C395 0.022
C396
100/16
X351
456kHz
R359
1.8K
C367
1/50
C364
4.7/50
C363
0.022
C365
0.022
L353
1mH
C362
3.3/50
C350
0.047 C361
0.022
C342
0.022
IC303
LA1832S
FM IF DET./FM MPX./AM IF
R351
5.6K
C352
10/50
C351
0.022
R355
3.3K
C356 0.001
C357
2.2/50
C355
22P
(CH)
C399
0.022
R353
270
C354
0.022
C353
0.022 C366
0.001
R356
1K
C368
1/50
CF351
T351
C358
1/50
R352
1K
C343
33P
(CH)
C374
0.015
R358
8.2K
R363
1.2K
C373
0.015
R357
470K
Q351
KRC104M
R364
1.2K
C372
1/50
C371
1/50
R362 18K
R361
18K
R370
1K
CF352
CF302
C330
15P(CH)
R336
10K
C323
0.022
C332
0.022 C331
0.047
T306
C335
330P(CH)
C337
0.022
VD301
SVC348S
R323
68K
C339
100P
(CH)
R325
47K
C318
100P(CH)
R322
270
C303
10P(CH)
BF301
D301
DS1SS133
D302
DS1SS133
C338
0.001
D304
DS1SS133
D303
DS1SS133
C327
0.1
T312
R311
100K
R313
33K
CNP303
C309 0.001
C324
4P(CH)
C326
18P(CH)
L312
C305
5P(CH)
C315
0.0047
R302
10
C314
0.0047
C304
0.01
D310
DS1SS133
R314
22
C313
22P
(CH)
IC301
TA7358AP
FM FRONT END
C325
15P(CH)
VD302
SVC211C
R309
10K
T311
D311 DS1SS133
D312 DS1SS133
C310
100P
(CH)
C311
100P(CH)
C312
100P
(CH)
C384
0.001
R372
1K
R373
1K
R374
1K
D305
DS1SS133
D306
DS1SS133
R399
10K
C389
0.001
R392
390
DZ351
DZ5.1BSB
C320
0.047
R383
5.6K
Q371
KTA1266GR
Q360
2SB562C
R384
5.6K
R371
4.7K
C391
47/16
R385
5.6K
D352
DS1SS133
IC302
C390
0.001
L351
100µH
C394
47/16
C387
0.022
R380
1.5K
R379
2.2K
C385
0.01
C392
0.001
C393
1/50
R381
10K
R345
4.7K
C321
100/16
R376
1K
C386
330P
(CH)
C341
0.1
C346
0.022
L342
2.2µH
X352
4.5MHz
C381
12P(CH)
C382
15P(CH)
R378
82K
C397
0.022
R360
4.7K
R382
150
R395
47K
C347
0.022
C301
0.001
C345
0.022
C334
15P(CH)
BAND
PASS
FILTER
VD303
SVC211C
Q302
KTC3194Y
R369
820
C308
5P(CH)
C380
10/50
FM
MUTE
LEVEL
VR351
10K(B)
R350
2.7K
C398
100/16
IC302
LC72131
PLL(TUNER)
T302
C306
0.001
AMOSC.
0.8V
1.6V
3.6V
1.6V
0V
3.6V
2.9V
3.6V
3.6V
0.1V 1.8V
0.8V
2.3V
0V
0V
0V
4.7V
0.1V
3.5V
4.1V
3.6V
4.7V
0.8V
0.8V
4.7V
4.7V
2.3V
0V
0V
4.7V
4.7V
0V
9.2V
10V 10V 2V
4.6V
2V
2V
0V
4.7V
4.7V
2.5V
4.6V
3.9V
3.4V
3V
4.6V
2.4V
0.3V
0V
2.3V
2.1V
2V
1.2V
1.2V
3.6V
3.4V
0V 0V
2.3V
1.3V
2.1V
VT_CK
A_GND
TUN_R
VSM
TUN_L
A_+B
D_GND
C2B_CE
C2B_CL
C2B_DI
C2B_DO
3
2
1
123
9
8
7
6
5
4
3
2
1
24
23
22
21
20
19
17
16
15
14
1312
11
10
9
8
7
6
5
4
3
2
1
FM IF IN
AM MIX OUTAM OSC OUT
FM AFC
AM OSC IN
AM RF IN
AM LOW
CUT
VSM
FM/AM
OUT
MPX VCO
MPX IN
R-CH OUT
L-CH OUT
PHASE
(FM/AM)
PHASE
IF OUT
VCC
FM DET
STEREO
SD
GND
AM IF IN
REG
MO/ST
3
2
1
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1 NC
MUTE IO2
IF IN
X OUT
X IN
CE
DI
CL
DO
AM IN
FM IN
VDD
PD
AIN
AOUT
VSS
FM
MW
MO/ST
ST IND
NC
C2B_CL
C2B_DI
C2B_CE
C2B_DO
FM/AM
LOOP
ANTENNA
18
E
F
G
H
I
J
K
L
M
N
P21 10-A
TOAUDIOSECTION
AM SIGNAL
FM SIGNAL
+B
+B
+B
+B
+B
+B
+B
+B
+B +B
+B
+B
FMBAND
COVERAGEfL
AMANT.
OSCBUFF
SWITCHING
SWITCHING
+B
+B
TP302