Sharp CD-BA120 User manual

CD-BA120
SHARP CORPORATION
No. XXXXXXXXXXXXX
CONTENTS Page
IMPORTANT SERVICE NOTES (FOR U.S.A. ONLY)....................................................................................................... 2
SPECIFICATIONS ............................................................................................................................................................. 2
NAMES OF PARTS ........................................................................................................................................................... 3
OPERATION MANUAL ...................................................................................................................................................... 5
QUICK GUIDE ................................................................................................................................................................... 6
DISASSEMBLY.................................................................................................................................................................. 7
REMOVING AND REINSTALLING THE MAIN PARTS................................................................................................... 10
ADJUSTMENT ................................................................................................................................................................. 11
NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 13
WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 14
BLOCK DIAGRAM ........................................................................................................................................................... 15
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD..............................................................................................18
VOLTAGE ........................................................................................................................................................................ 34
TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 35
FUNCTION TABLE OF IC................................................................................................................................................ 39
FL DISPLAY......................................................................................................................................................................45
REPLACEMENT PARTS LIST/EXPLODED VIEW
PACKING OF THE SET (FOR U.S.A. ONLY)
• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.
SERVICE MANUAL
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
CD-BA120MiniComponentSystemconsistingofCD-BA120
(main unit) and CP-BA120 (speaker system).
CD-BA125
CD-BA125 Mini Component System consisting of
CD-BA125 (main unit), CP-BA125 (Front speaker) and
GBOXS0042AWM1 (rear spaeker).
Illustration: CD-BA120
Illustration: CD-BA125
CD-BA120/125

CD-BA120/125
– 2 –
●General
Power source: AC 120 V, 60 Hz
Power consumption: 35 W
Dimensions: Width; 10-5/8" (270 mm)
Height; 11-13/16" (300 mm)
Depth; 14-11/16" (373 mm)
Weight: 10.6 lbs. (4.8 kg)
●Amplifier section
Output power:
(Except for Canada)
(For Canada)
(CD-BA120)
(CD-BA125)
10 watts minimum RMS per
channel into 8 ohms from
100 Hz to 20 kHz, 10 %
total harmonic distortion
Output terminals: Speakers; 8 ohms
Headphones; 16-50 ohms
(recommended; 32 ohms)
●Compact disc player section
Type: 3-disc multi-play compact
disc player
Signal readout: Non-contact, 3-beam semi-
conductor laser pickup
D/A converter: 1-bit D/A converter
Frequency
response: 20 - 20,000 Hz
Dynamic range: 90 dB (1 kHz)
●Tuner section
Frequency range: FM; 87.5-108 MHz
AM; 530-1,720 kHz
●Cassette deck section
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)
●Speaker section
Type: 4" (10 cm) full-range speaker
Maximum input power: 20 W
Rated input power: 10 W
Impedance: 8 ohms
Dimensions: Width; 8-11/16" (220 mm)
Height; 11-13/16" (300 mm)
Depth; 7-1/16" (180 mm)
Weight: 4.4 lbs. (2.0 kg)/each
Output power: RMS; 20 W (10 W + 10 W)
(10 % T.H.D.)
Output terminals: Front speakers; 8 ohms
Rear speakers; 16 ohms
Headphones; 16-50 ohms
(recommended; 32 ohms)
●Rear speaker section (CD-BA125 Only)
Type: 3-3/32"(8 cm) full-range speaker
Maximum input power: 5 W
Rated input power: 10 W
Impedance: 16 ohms
Dimensions: Width; 6" (150 mm)
Height; 6" (150 mm)
Depth; 3" (78 mm)
Weight: 0.9 lbs. (0.4 kg)/each
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
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.
AllcheckmustberepeatedwiththeAClinecordplugconnection
reversed.
Anyreading of 0.3 volt RMS (this corresponds to0.2milliamp.
AC.) or more is excessive and indicates a potential shock
hazard which must be corrected before returning the audio
product to the owner.
Specifications for this model are subject to change without
prior notice.
SPECIFICATIONS
CD-BA120/125
CP-BA120/125
TO EXPOSED
METAL PARTS
CONNECT TO
KNOWN EARTH
GROUND
TEST PROBE
0.15 µF
1.5k ohms
10W
VTVM
AC SCALE
GBOXS0042AWM1

– 3 –
CD-BA120/125
NAMES OF PARTS
CD-BA120/125
1
23458
9
67
10 1211
16
13
18 22
19
20
21
15
23
24 25 26 27 28 29
14
17
30 31
■Front panel
11. (CD) Disc Tray
12. (CD) Disc Number Indicators
13. Timer Indicator
14. Record Indicator
15. Sleep Indicator
16. Extra Bass Indicator
17. (CD/TUNER) Memory Indicator
18. FM Stereo Mode Indicator
19. FM Stereo Indicator
10. (CD) Repeat Indicator
11. (CD/TAPE) Play Indicator
12. (CD) Pause Indicator
13. (CD) Disc Skip Button
14. (CD) Track Down/Review Button
3 (TUNER) Preset Down Button
3 (TAPE 2) Rewind Button
15. (CD) Track Up/Cue Button
3 (TUNER) Preset Up Button
3 (TAPE 2) Fast Forward Button
16. (CD) Open/Close Button
17. Timer Set Indicator
18. On/Stand-by Button
19. Timer/Sleep Button
20. Clock Button
21. Function Selector Buttons
22. Equalizer Mode Selector/Extra Bass/Demo Mode
Button
23. Volume Up/Down Buttons
24. Headphone Socket
25. Memory/Set Button
26. (CD/TAPE) Stop Button
27. (CD) Play/Repeat Button
3 (TAPE) Play Button
28. (TAPE 2) Record Pause Button
29. Tuning/Time Up/Down Buttons
30. (TAPE 1) Cassette Compartment
31. (TAPE 2) Cassette Compartment

CD-BA120/125
– 4 –
■Rear panel
11. AC Power Input Socket
12. Rear Speaker Terminals (CD-BA125 Only)
13. Front Speaker Terminals
14. FM/AM Loop Aerial Socket
■Front speaker
11. Woofer
12. Bass Reflex Duct
13. Speaker Wire
1
2
3
4
1
23
1
2
1
2
3
4
8
9
10
11
12
7
6
5
14
13 15
19
22
20
181716
21 23
■Rear speaker (CD-BA125 Only)
11. Full-Range Speaker
12. Speaker Wire
■Remote control
11. Remote Control Transmitter LED
●CD control section
12. Disc Number Select Buttons
13. Memory Button
14. Pause Button
15. Clear Button
16. Track Down/Review Button
17. Track Up/Cue Button
18. Disc Skip Button
19. Play/Repeat Button
10. Stop Button
11. Random Button
●Tuner control section
12. Preset Up/Down Buttons
●Tape control section
13. (TAPE 1) Play Button
14. (TAPE 2) Record Pause Button
15. (TAPE 1/2) Stop Button
16. (TAPE 2) Play Button
17. (TAPE 2) Rewind Button
18. (TAPE 2) Fast Forward Button
●Common section
19. Equalizer Mode Selector Button
20. Function Selector Buttons
21. On/Stand-by Button
22. Extra Bass Button
23. Volume Up/Down Buttons
CP-BA120/125
GBOXS0042AWM1
CD-BA120/125

– 5 –
CD-BA120/125
OPERATION MANUAL
SETTING THE CLOCK
POWER
ON/
STAND-BY
CLOCK
MEMORY/SET
TUNING/ TIME ( )
In this example, the clock is set for the 12-hour (AM 12:00) sys- tem.
1
Press the ON/STAND-BY button to enter the stand-by mode.
2
Press the CLOCK button.
3
Within 5 seconds, press the MEMORY/SET button.
4
Press the TUNING/TIME ( or ) button to select the time display mode.
"AM 12:00" →The 12-hour display will appear. (AM 12:00 - PM 11:59) "AM 0:00" →The 12-hour display will appear. (AM 0:00 - 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 (see page 15).
5
Press the MEMORY/SET button.
6
Press the TUNING/TIME ( or ) button to adjust the hour.
●Press the TUNING/TIME ( or ) button once to advance
the time by 1 hour. Hold it down to advance continuously.
●When the 12-hour display is selected, "AM" will change auto-
matically to "PM".
7
Press the MEMORY/SET button.
8
Press the TUNING/TIME ( or ) button to adjust the minutes.
●Press the TUNING/TIME ( or ) button once to advance
the time by 1 minute. Hold it down to change the time in 5 minute intervals.
●The hour setting will not advance even if minutes advance from
"59" to "00".
9
Press the MEMORY/SET button.
●The clock starts operating from "0" second.
(Seconds are not displayed.) And then the clock display will disappear after a few seconds.
To see the time display:
Press the CLOCK button. ●The time display will appear for about 5 seconds.
Note: ●The clock display will flash on and off at the push of the CLOCK
button when the AC power supply is restored after a power failure occurs or after the AC power cord is disconnected. If this happens, follow the procedure below to change the clock time.
To change the clock time:
①
Press the CLOCK button.
②
Within 5 seconds, press the MEMORY/SET button.
③
Perform steps 6 - 9 above.
To change the time display mode:
①
Perform steps 1 - 2 in the section "RESETTING THE MICROCOMPUTER", on page 15.
②
Perform steps 1 - 9 above.
(Main unit operation)
AM 0:00AM 12:00 0:00
2
3
4
7 6
5 8
9
RESETTING THE MICROCOMPUTER
Reset the microcomputer under the following conditions: ●To erase all of the stored memory contents (clock and timer
settings, and tuner and CD presets).
●If the display is not correct. ●If the operation is not correct. 1
Press the ON/STAND-BY button to enter the stand-by mode.
2
While pressing down the button and the EQUALIZER/X- BASS/DEMO button, hold down the ON/STAND-BY button for at least 1 second.
●"CLEAR AL" will appear.
Caution: ●The operation explained above will erase all data stored in
memory including clock and timer settings, and tuner and CD presets.
EQUALIZER X-BASS/ DEMO
POWER
ON/
STAND-BY

CD-BA120/125
– 6 –
MINI COMPONENT SYSTEM Quick Guide/Guía rápida
CD-BA120
●Remote control x 1 ●
Controlador remoto x 1
●2 “AA” batteries ●
Dos pilas “AA”
Remote Sensor Sensor remoto
2
Preparation for use /
Preparación para su uso
1
Check the supplied accessories /
Compruebe los accesorios suministrados
●FM/AM loop antenna x 1 ●
Antena de cuadro de
FM/AM x 1
●Batteries are not included. ●
Las pilas no están incluidas.
8” - 20’ (0.2m - 6m) 0,2m - 6m
■Speaker connection ■
Conexión de los altavoces
■Antenna connection ■
Conexión de las antenas
Front speaker (Right) Altavoz delantero
(Derecho)
Front speaker (Left) Altavoz delantero
(Izquierdo)
●AM Loop Antenna ●
Antena de cuadro
de AM
●FM Antenna ●
Antena de FM
●AC 120 V, 60 Hz ●
120 V de CA, 60 Hz
Red Rojo
■Switching between power-on and stand-by mode ■
Cambio entre la conexión de la alimentación y el
modo de reserva
■Remote control ■
Controlador remoto
15
15
Black Negro
●AC power cord x 1 ●
Cable de alimentación de
CA x 1
3
Listening to a CD /
Audición de discos CD
4
Listening to a tape /
Audición de una cinta
5
Listening to the radio /
Audición de la radio
6
Recording from CDs /
Grabaciones de discos CD
7
Sound control /
Control del sonido
●Label facing up ●
Etiqueta hacia arriba
■To stop the playback ■
Para detener la reproducción
■To stop the recording ■
Para detener la grabación
●Load the disc to be recorded. ●
Introduzca el disco
que va a grabar.
●CD recording starts. ●
La grabación de
CD empieza.
■Volume ■
Volumen
<Extra bass (X-BASS)> <Graves extra (X-BASS)> <Pre-programmed equalizer> <Ecualizador preprogramado>
Printed in Malaysia Impreso en Malaysia
TINSZ0533AWZZ A9911.HK
FLAT ROCK POPS
JAZZ
CLASSIC
VOCAL
■To stop the playback ■
Para detener la reproducción
TAPE 1 TAPE 2
TAPE 2
FLAT (X-BASS on)
ROCK (X-BASS on)
POPS (X-BASS on)
JAZZ (X-BASS on)
CLASSIC (X-BASS on)
VOCAL (X-BASS on)
VOCAL (X-BASS off)
CLASSIC (X-BASS off)
JAZZ (X-BASS off)
POPS (X-BASS off)
ROCK (X-BASS off)
FLAT (X-BASS off)
■Extra bass (X-BASS) / Pre-programmed equalizer ■
Graves extra (X-BASS) / ecualizador preprogramado

– 7 –
CD-BA120/125
1 Top Cabinet 1. Screw ..................... (A1) x4 7-1
2 Side Panel 1. Screw ..................... (B1) x6 7-1
(Left/right)
3 CD Player Unit/ 1. Turn on the power supply, 7-2
CD Tray Cover
open the disc tray, take out the
CD cover, and close. (Note 1)
2. Screw ..................... (C1) x1
3. Hook....................... (C2) x3
4. Hook....................... (C3) x2
5. Socket .................... (C4) x2
4 Main/Headphones 1. Screw ..................... (D1) x11 7-2,8-2
PWB/Rear Panel 2. Socket .................... (D2) x4 8-2
3. Flat Cable............... (D3) x1
5 Front Panel 1. Screw ..................... (E1) x3 8-2
6 Display PWB 1. Screw ..................... (F1) x9 8-3
2. Flat Cable............... (F2) x1
7 Tape Mechanism 1. Open the cassette holder. 8-3
2. Screw...................... (G1) x6
9 Turntable 1. Hook....................... (H1) x2 8-4
2. Cover ..................... (H2) x1
10 Disc Tray 1. Turn fully the lock lever in the 7-3
arrow direction.
2.
While holding the lock lever,rotate 8-1
the cam gear until the cam gear
rib engages with the clamp lever.
3. Push the slide holder backward to 8-5
engage the claw with the groove
and remove it in the direction
of the arrow. .............. (J1) x6
11 CD Servo PWB 1. Screw ..................... (K1) x1 8-6
(Note 2) 2. Hook....................... (K2) x2
3. Socket .................... (K3) x4
12 CD Mechanism 1. Hook....................... (L1) x2 9-1
2. Hook....................... (L2) x3
13 Loading Motor PWB 1. Hook....................... (M1) x5 9-1
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.Takeoffnylonbandsorwireholderswheretheyneedbe
removed when disassembling the unit. After servicing
theunit, besure to rearrangethe leadswhere theywere
before disassembling.
4. Take suffcient care on static electricity of integrated
circuits and other circuits when servicing.
Figure 7-2
Figure 7-3
CD-BA120/125
STEP REMOVAL PROCEDURE FIGURE
Note 1:
How to open the changer manually. (Fig. 7-3)
1. In this state, turn fully the lock lever in the arrow direction
through the hole on the loading chassis bottom.
2. While holding the lock lever, rotate the cam gear anticlockwise
until the cam gear rib engages with the clamp lever. (Fig. 8-1)
3. After that, push forward the CD slide holder.
Note 2:
1.Afterremoving the connectorfor the opticalpickupfrom the
connector, wrap the conductive aluminium foil around the
frontendoftheconnectorsoastoprotecttheopticalpickup
from electrostatic damage.
Figure 7-1
CD-BA120/125
Note 3:
1. Be careful not to break the claw of the CD mechanism.
2.When fining backthecam gearassembly,let it lockby front
movement.
(B1)x4
ø3x12mm
(B1)x1
ø3x10mm
Rear
Panel
(B1)x1
ø3x10mm
Side Panel
(Right)
Side Panel
(Left)
(A1)x2
ø3x12mm
(A1)x2
ø3x12mm Top Cabinet
(C3)x1
(C1)x1
ø3x12mm
(D1)x3
ø3x12mm
CD Player
Unit
CD Tray Cover
Rear
Panel
Pull
(C3) x1
(C4)x2 (C2) x3
1
1
2
Main PWB
CD Servo
PWB
LOCK LEVER

CD-BA120/125
– 8 –
Figure 8-2
Figure 8-3
Figure 8-4
Figure 8-5
Figure 8-6
Turntable
Disc Tray
(H2) x1
CD Player Unit
(H) x2
1
2
(J1) x3
(J1) x3
(K3) x2
(K2) x2
(K3) x2
CD Servo
PWB CD Player
Base
(K1)x1
ø3x8mm
(E1)x3
ø3x8mm
(D2)x2
(D2)x2
(D3)x1
Main PWB
Headphones
PWB
(D1)x7
ø3x10mm
(D1)x1
ø3x10mm
(F1)x9
ø3x10mm
(F2)x1
(G1)x6
ø3x10mm
Display PWB
Open
Cassette
Holder
Tape
Mechanism
CLAMP LEVER
CAM GEAR RIB
Figure 8-1

– 9 –
CD-BA120/125
CP-BA120/125
CP-BA120/125
Figure 9-2
Figure 9-1
Figure 9-3
(L2) x3
(L1) x1
(M1) x5
(L1) x1
Loading
Motor
PWB
CD
Mechanism
Cam Gear
Driver
Driver should be
pried away from
Speaker Box.
Direction of handle
Speaker Box
(A2)x1
(A1)x1
Speaker Box
Speaker
(A3)x4
ø3.5x13mm
STEP REMOVAL PROCEDURE FIGURE
1 Speaker 1. Net ..........................(A1) x1 9-1
2. Duct Panel ..............(A2) x1
3. Screw......................(A3) x4 9-2

CD-BA120/125
– 10 –
REMOVING AND REINSTALLING THE MAIN PARTS
TAPE MECHANISM SECTION
Perform steps 1 to 5 and 7 of the disassembly method to
remove the tape mechanism.
How to remove the record/playback and erase
heads (TAPE 2) (See Fig. 10-1)
1.Carefullyremovetherecord/playbackheadanderasehead
screw (A1) x 2 pcs.
How to remove the playback head (TAPE 1)
(See Fig. 10-2)
1. Carefully remove the playback head screw (B1) x 2 pcs.
How to remove the pinch roller (TAPE 1/2)
(See Fig. 10-3)
1. Carefully bend the pinch roller pawl in the direction of the
arrow <A>, and remove the pinch roller (C1) upwards.
Note:
When installing the pinch roller, pay attention to the spring
mounting position.
How to remove the belt (TAPE 1) (See Fig. 10-4)
1. Remove the main belt (D1) x 1 pc., from the motor side.
2. Remove the FF/REW belt (D2) x 1 pc.
How to remove the belt (TAPE 2) (See Fig. 10-4)
1. Remove the main belt (E1) x 1 pc., from the motor side.
2. Remove the FF/REW belt (E2) x 1 pc.
How to remove the motor (See Fig. 10-5)
1. Remove the screws (F1) x 2 pcs., to remove the motor.
Figure 10-1
Figure 10-2
Figure 10-3
Figure 10-4Figure 10-5
TAPE2 TAPE1
Main Belt
(D1)x1
TAPE2
Main Belt
(E1)x1
TAPE1
Main Belt
FF/REW
Belt
(E2)x1
FF/REW
Belt
(D2)x1
Motor
Motor
(A1)x2
Ø2 x 9mm
TAPE2
Record/Playback
Head
Erase Head
(B1)x2
Ø2 x 9mm
TAPE1
Playback
Head
Pinch Roller
(C1)x1 <A>
(F1) x2
Ø 2.6 x 5mm
Motor

– 11 –
CD-BA120/125
How to remove the pickup (See Fig. 11-2)
1.Remove thescrews (B1) x 2 pcs., to remove the shaft (B2).
2. Remove the stop washer (B3) x 1 pc., to remove the gear
(B4).
3. Remove the pickup.
Figure 11-2
CD MECHANISM SECTION
Performsteps 1, 2, 3,9,12and13ofthedisassemblymethod
to remove the CD mechanism.
How to remove the loading motor
(See Fig. 11-1)
1. Bend the hooks (A1) x 5 pcs., to remove the loading motor.
Figure 11-1
Note
After removing the connector for the optical pickup from the
connectorwraptheconductivealuminiumfoilaroundthefront
end of connector so as to protect the optical pickup from
electrostatic damage.
(A1)x2
(A1)x1
Loading Motor
CD Base
(A1)x2
(B1) x2
ø2.6 x6mm
Shaft
(B2) x1
Stop Washer
(B3) x1
Gear
(B4) x1
CD Mechanism
Pickup
ADJUSTMENT
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
Tape 2
Play: TW-2111 30 to 80 g. cm 30 to 80 g.cm
Fast forward: TW-2231 — 70 to 180 g.cm
Rewind: TW-2231 — 70 to 180 g.cm
Specified Value
Tape 1
Specified
Value
Adjusting
Point Instrument Connection
Test Tape
Normal MTT-111 Variable 3,000 ±Speaker
speed Resistor in 30 Hz terminal
motor. (Load
resistance:
6 ohms)
•Tape Speed
Figure 11-3
TAPE MECHANISM
Motor
Variable Resistor in motor

CD-BA120/125
– 12 –
CD SECTION
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
*1. Input: Antenna, Output: TP302
*2. Input: Antenna, Output: TP301
TUNER SECTION
fL: Low-range frequency
fH: High-renge frequency
AM IF 450 kHz 1,720 kHz T351 *1
AM Band — 530 kHz (fL): T306 *2
Coverage 1.1 ±0.1 V
AM Tracking 990 kHz 990 kHz (fL): T303 *1
*1. Input: Antenna, Output: TP301
*2. Input: Antenna, Output: Speaker terminal
•FM RF
Signal generator: 1 kHz, 22.5 kHz dev., FM modulated
FM Band — 87.50 MHz T301(fL): *1
Coverage 3.4 V ±0.1V
FM RF 98.00 MHz 98.00 MHz L312 *2
(10-30 dB)
Test Stage Instrument
Connection
Frequency Frequency
Display Serring/ Adjusting
Point
Figure 12-1 ADJUSTMENT POINT
Test Stage Frequency Frequency
Display Setting/
Adjusting
Parts
Instrument
Connection
IC301
R381
TP302
TP301
R357
AM IF
FM IF FM RF
T303
T306
T302 L312
AM
TRACKING fL
AM BAND
COVERAGE fL
T301
T351
FM BAND
COVERAGE fL
TUNER PWB
CNP301
AM LOOP
ANTENNA
1
Figure 12-2
CD ERROR CODE DESCRIPTION
Error State Code
[Servo System Error]
0001 Cannot detect Pickup-in SW
0002 DSP access error
[Error during close operation]
0101 Open/Close SW Low → High not functioning
0103 Open/Close SW High →Low not functioning
[Error during open operation]
0201 Open/Close SW Low → High not functioning
0203 Open/Close SW High →Low not functioning
[Error during skip operation]
0302 Pickup-in SW is not detected
0306 During Disc 1 search, Open/Close SW or Clamp SW
or Disc SW do not change to low.
0307 Clamp SW Low → High not functioning
0308 Clamp SW High →Low not functioning
Since this CD system incorporates the following automatic
adjustment functions, readjustment is not needed when
replacingthepickup.Therefore,differentPWBsandpickups
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
(2) Tracking balance adjustment (waveform drawing 12-2
EFBL)
(3)Gain adjustment (The gainiscompensatedinsidetheIC
sothat theloop gainat thegain crossoverfrequency will
be 0dB.)
* Focus gain adjustment
* Tracking gain adjustment
•Adjustment
T
T
EFBL
FDO
TE
Stopped
CH1=500mV
DC 10:1 CH2=200mV DC 10:1 CH3=1V DC 10:1 500ms/div
(500ms/div)
NORM:20kS/s
1
2
3
=Record Length=
Smoothing : ON CH1 : 0.000V
CH2 : 0.000V Main : 100K Zoom : 2k Mode : SINGLE Type : EDGE CH1
Delay : 0.0ns
Hold off : 0.2us
CH3 : 0.00V
CH4 : 0.00V
BW : FULL
=Trigger==Filter= =Offset=
CH2
v/DIV
200mV
1999/04/05 20:26:47

– 13 –
CD-BA120/125
•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 “ ” ( ) 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 micro-micro-farad and the unit of the
capacitor without such a symbol is microfarad. As to
electrolyticcapacitor,theexpression“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.
REF. NO DESCRIPTION POSITION POSITION
SW714 CD ON—OFF
SW715 TAPE ON—OFF
SW716 TUNING /TIME DOWN ON—OFF
SW717 MEMORY/SET ON—OFF
SW718 REWIND ON—OFF
SW719 FAST FORWARD ON—OFF
SW720 PLAY/REPEAT ON—OFF
SW721 STOP ON—OFF
SW723 REC/PAUSE ON—OFF
SW725 TUNING/TIME UP ON—OFF
SW725 TUNER (BAND) ON—OFF
REF. NO DESCRIPTION
SW1 OPEN/CLOSE ON—OFF
SW2 CLAMP ON—OFF
SW3 DISC NUMBER ON—OFF
SW4 PICKUP IN ON—OFF
SW701 POWER ON—OFF
SW702 CLOCK ON—OFF
SW703 TIMER/SLEEP ON—OFF
SW709 DISC SKIP ON—OFF
SW710 OPEN/CLOSE ON—OFF
SW711 X-BASS/DEMO/EQUALIZER ON—OFF
SW712 VOLUME UP ON—OFF
SW713 VOLUME DOWN ON—OFF
Figure 13 TYPES OF TRANSISTOR AND LED
(1) (2) (3)
(S) (G) (D)
E C B
FRONT
VIEW
KTA1266 GR
KRC102 M
KRC104 M
KTA1271 Y
2SC1845 F
KTA1273 Y
KTC3203 Y
KRC107 M
KTC3194 Y
2SC3331
KTC2026 4204SRT7
BCE
FRONT
VIEW
FRONT
VIEW

CD-BA120/125
– 14 –
WAVEFORMS OF CD CIRCUIT
T
FDO
TDO
Stopped
CH1=500mV
DC 10:1 CH3=500mV DC 10:1 500ms/div
(500ms/div)
NORM:20kS/s
1
3
=Record Length=
Smoothing : ON CH1 : 0.000V
CH2 : 0.0V Main : 100K Zoom : 2K Mode : AUTO Type : EDGE CH1
Delay : 0.0ns
Hold off : 0.2us
CH3 : 0.000V
CH4 : 0.00V
BW : FULL
=Trigger==Filter= =Offset=
CH1
v/DIV
500mV
1IC2 24
2IC2 23
T
FDO
DRF
TE
Stopped
CH1=500mV
DC 10:1 CH2=10V DC 10:1 CH3=1V DC 10:1 500ms/div
(500ms/div)
NORM:20kS/s
1
2
3
=Record Length=
Smoothing : ON CH1 : 0.000V
CH2 : 0.0V Main : 100K Zoom : 2K Mode : AUTO Type : EDGE CH1
Delay : 0.0ns
Hold off : 0.2us
CH3 : 0.00V
CH4 : 0.00V
BW : FULL
=Trigger==Filter= =Offset=
-3div -1div 0div +1div +3div
CH Position To
CH2
Position
0.20div
1
IC2 24
3
IC2 72
4
IC1 18 ,
IC2 16
Vp-p=1.0V~1.3V
0.5mV/div,0.5µsec/div
5
IC1 27
T
T
TE
DRF
Stopped
CH1=10V
DC 10:1 CH2=1V DC 10:1 100ms/div
(100ms/div)
NORM:100kS/s
2
1
=Record Length=
Smoothing : ON CH1 : 0.0V
CH2 : 0.00V Main : 100K Zoom : 2K Mode : NORMAL Type : EDGE CH1
Delay : 2.924ms
Hold off : 0.2us
CH3 : 0.00V
CH4 : 0.00V
BW : FULL
=Trigger=
=Filter= =Offset=
3
IC2 72
4
IC1 18 ,
IC2 16
T
T
FDO
SPDO
Stopped
CH1=200mV
DC 10:1 CH2=500mV DC 10:1 500ms/div
1999/04/07 09:51:15
(500ms/div)
NORM:20kS/s
2
1
=Record Length=
Smoothing : ON CH1 : 0.000V
CH2 : 0.000V Main : 100K Zoom : 2K Mode : NORMAL Type : EDGE CH2
Delay : 2.924ms
Hold off : 0.2us
CH3 : 0.00V
CH4 : 0.00V
BW : FULL
=Trigger=
=Filter= =Offset=
1
IC2 24
6
IC2 25
T
FDO
PDO2
PDO1
Stopped
CH1=500mV
DC 10:1 CH3=1V DC 10:1 CH4=1V DC 10:1 500ms/div
(500ms/div)
NORM:20kS/s
1
4
3
=Record Length=
Smoothing : ON CH1 : 0.000V
CH2 : 0.0V Main : 100K Zoom : 2K Mode : AUTO Type : EDGE CH2
Delay : 0.0ns
Hold off : 0.2us
CH3 : 0.00V
CH4 : 0.00V
BW : FULL
=Trigger==Filter= =Offset=
CH1
v/DIV
500mV
1999/04/05 17:33:17
1
IC2 24
7
IC2 1
8
IC2 2
T
T
DOUT
Stopped
CH1=2V
DC 10:1 500ns/div
1999/04/07 09:25:28
(500ns/div)
NORM:200MS/s
1
=Record Length=
Smoothing : ON CH1 : 0.00V
CH2 : 0.00V Main : 1K Zoom : 100 Mode : NORMAL Type : EDGE CH1
Delay : 2.887ms
Hold off : 0.2us
CH3 : 0.00V
CH4 : 0.00V
BW : FULL
=Trigger=
=Filter= =Offset=
9
IC2 37
T
T
DATA
DATACK
LRSY
Stopped
CH1=2V
DC 10:1 CH2=2V DC 10:1 CH3=2V DC 10:1 5us/div
(5us/div)
NORM:100kS/s
1
2
3
=Record Length=
Smoothing : ON CH1 : 0.00V
CH2 : 0.00V Main : 5K Zoom : 100 Mode : AUTO Type : EDGE CH3
Delay : 0.0ns
Hold off : 0.2us
CH3 : 0.00V
CH4 : 0.00V
BW : FULL
=Trigger==Filter= =Offset=
CH3
v/DIV
2 V
1999/04/05 20:50:17
10
IC2 57
IC2 58
IC2 59
11
12
T
T
EFBL
FDO
TE
Stopped
CH1=500mV
DC 10:1 CH2=200mV DC 10:1 CH3=1V DC 10:1 500ms/div
(500ms/div)
NORM:20kS/s
1
2
3
=Record Length=
Smoothing : ON CH1 : 0.000V
CH2 : 0.000V Main : 100K Zoom : 2k Mode : SINGLE Type : EDGE CH1
Delay : 0.0ns
Hold off : 0.2us
CH3 : 0.00V
CH4 : 0.00V
BW : FULL
=Trigger==Filter= =Offset=
CH2
v/DIV
200mV
1999/04/05 20:26:47
1
IC2 24
4
IC1 18 ,
IC2 16
IC1 13 ,
IC2 22
13

– 15 –
CD-BA120/125
Figure 15 BLOCK DIAGRAM (1/3)
CNP12
CNP11
Q2
+3.3V
+5V
CONT5
CONT2 CONT3 CONT4 CONT7 CONT6
SLD0
SPD0
FD0
TD0
+5V
TO DISPLAY SECTION
CLAMP SW CDINT
WRQ
CE DO
CLK
DI CD RES GND DRF
CNS4 BI4
CNP4
M2
SLED
MOTOR
M1
SPINDLE
MOTOR
M
M
TRACKING COIL
FOCUS COIL
PICKUP UNIT
TE FE RFEV HFL VVDD ADAVDD VDD LVDD RVDD XVDD
VDD5V
RFEV
FE-
FE
TE-
TE
HFL
+3.3V
CONSTANT
VOLTAGR
+5V
Q1
Q3
LASER
DRIVER
LDD PD
VCC3
VCC2
VCC4
VCC1
TIN2 TIN1 FIN2 FIN1
IC3
M63001FP
FOCUS/TRACKING/
SPIN/SLIDE DRIVER
IC1
LA9235M
SERVO AMP.
TO MAIN SECTION
(TO IC601)
R-CH
L-CH AGND DGND +5V(+B3)
RCHO
RVSS
LVSS
LCHO
IC2
LC78641E
SERVO/SIGNAL
CONTROL
-
+
M
SW1
OPEN/
CLOSE
XL1
16.9344MHz
6
5
43
3
25
4
1
1234 78
217
89
10
12 4
35
SW2
CLAMP SW3 DISC
NUMBER
M3
T/T
UP/DOWN
MOTOR
6
12 4
356
12 4
356
75 76 45 46 47 48 32 31 30
65
66
67
68
69
70
71
72
CE
CL
DI
DO
INT
WRQ
RES
DEF
52
51
XOUT
XIN
73 518 36 44 49 50 7 14 15 16
23
24
25
26
33
3
13
19
40
64
74
17 18 19 20 21 22
30
23
11
9
1
4567 15 16 26 27
2 1725 4142 3839
35
29
22
21
14
8
40
18
24
23
28
SW4
PICKUP IN
+3.3V

CD-BA120/125
– 16 –
Figure 16 BLOCK DIAGRAM (2/3)
REC/PLAY
CL
CE
DI
SYSTEM
MUTE
Q601
Q602
DO CL DI CE
MO/ST
+B2 SWITCHING +B2
FM/AM
IC302
LC72131
PLL(TUNER)
FM/AM
OUT
+B4
L
R
BIAS
T1/T2
MUTING
Q110
Q111
P.B.
REC
AC BIAS
L
L
R
R
R
L
TAPE
TUNER
CD
PB
CNS402
FROM
CD SECTION
CNP11
ERASE
HEAD
SWITCHING
SWITCHING
SWITCHING
BIAS
Q102
Q103
Q101
Q113
SWITCHING
Q112
L103
OSC
BIAS
Q114
L104
Q108
Q109
REC PB HEAD
TAPE 2
PB HEAD
TAPE 1
R-CH
L-CH
R-CH
L-CH
IC601
LC75341
AUDIO PROCESSOR
H/N
P.B
+B2
R
L
R
L REC
L NF
R NF
ALC
REC
T1/T2
T1/T2
NOR/
HIGH
REF
R REC
L REC
POP
REDUCE
R NF
L NF
SWITCHING
Q104~
Q107
L(T2)
R(T2)
R(T1)
L(T1)
IC101
AN7345K
PLAYBACK AND RECORD
/PLAYBACK AMP.
R
L
FM/AM
MPXIN
STEREO
AM RF IN
AM OSC IN
FM
Q360
VT
FM OSC
OSC BUFF
OSC
X352
4.5MHZ
AM BAND
COVERAGE
AM TRACKING
T303
Q302
X351
456KHz
MO/ST
VCO
FM
DET
VCC
GND
AM IF
CF351
AM IF
IC303
LA1832S
FM/AM IF MPX.
AM MIX
CF352
T351
FM RF
FM OSC
L312
CF303
T302
FM IF
IC301
TA7358AP
FM FRONT END
BF301
CNP301
FM
AM
22
3
21
4
24
2
1
8 18
17
5
4
3
910
18
11
3
15
10
7
23
14
12
13
1
2
20
19
7
18
10
8
17
13
21
4
5
2
24
23
6
9
16
14
12
15
1
5
14 3
8
4
3
2
1
1
2
3
21
7
98 5
6
21
2
1
20 22 11
17
1615
9
6
57
13
14
12
15
16
23
4
7
FM
+B
4
T306
T301 17
Q708 +3B
+3B
M
Q704
Q705
IC701
54PIN
IC701
53PIN
IC701
56PIN
IC701
55PIN
TAPE
MOTOR
SOLENOID
T2 PLAY
T1 PLAY
R. PLAY
F. PLAY
MOTOR
DRIVER

– 17 –
CD-BA120/125
Figure 17 BLOCK DIAGRAM (3/3)
PT801
POWER TRANSFORMER
5V
~
REC/PLAY
VLOAD
+B4
RESET IC
SYS. STOP
RESET
IC704
Q707
+B2
SPEAKER
TERMINAL
(FRONT)
(REAR)
SO901
+B4
+B4
+B4
+B4
VDD VDD VDD
R-OUT
L-OUT
SP. DET.
UNSWITCH
+5V
A10V
+B4
+B3
+B2
+B1
~
IC904
IC902
Q903
SYSTEM
MUTE
Q601
Q602
CE DI CL DO
+B4
XL701
~
D911~D914
D907~D910
F902
1.6A/250V
F901
3A/250V
~
~~~
+Vcc
IC901
LA4282
POWER AMP.
BIAS
T1/T2
AVDD
KEY
SW701~SW703
SW709~SW721
SW723~SW725
TO CD
SECTION
AC POWER
SUPPLY CORD
AC 120V 60Hz
TF
IC701
IX0336AW
SYSTEM
MICROCOMPUTER
FL701
FL DISPLAY
~
~
11
10
5
27
1
3
3332
78
91
80
100
27 31
13
11
10
65
41
2
99
92
33
31
45
46
7 1112139 10 15 16 17 20 21 22 24
71
79
595857 5554535251 4948 47 44434244 39
38
37
36
35
34
3
2
1
Q901
Q902
30
40
5056
23
L
R
JK901
HEADPHONES
CD-BA125 ONLY
Q701
Q904
2118
17
14
2220
191615

CD-BA120/125
– 18 –
Figure 18 SCHEMATIC DIAGRAM (1/10)
A
B
C
D
E
F
G
H
123456
• NOTES ON SCHEMATIC DIAGRAM can be found on page 13.
42
41
40
39
38
37
36
LOADING M-
VCC4
LD_M+
LD_M-
LOADING M+
35
34
33
32
31
30
29
28
27
26
25
24
23
22
SPDO
VCC3
VCC2(SPN)
SP-
SP+
SPO
GND
+B
EFBL
P
H
TDO
NC
TEST
HFL
TE
TE-
FE
FE-
RFEV
BH
PH
RF
RF-
RFSW
VCC
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
REF
ODRV
AGCON
ODRV
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
AGCON
ODRV
APC
LPF
DH
PH
LPF
LPF
PH/BH
LDON
EFBL
FIN1
FIN2
REF1
TIN2
TIN1
AGON
LDD
TEST0
GND
VREF
TES1
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
FIN2
FIN1
TIN2
TIN1
+B
+B
2
5
3
1
7
6
44
3
2
1
7
6
5
CD SERVO PWB-B
5
1
3
7
6
4
2
4
3
2
1
7
6
5
Vcc
C
Vref
F
B
E
A
LD
VR
PD
GND
FO-
FO+
TR+
TR-
5
2
1
2
3
4
5
6
7
88
3
6
7
1
4
TR-
TR+
FO+
FO-
GND
PD
VR
LD
ACTUATOR
FO+
FO-
TR-
TR+
1
2
3
4
5
6
7
88
3
6
7
1
4
5
2
PICKUP UNIT
GND(D)
PUIN
SP+
SP-
SL+
SL-
3
2
5
1
4
6
2
3
5
1
4
6
3
6
1
4
5
22
3
5
1
4
6
CD MOTOR PWB-C
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
SLDO
FDO
TDO
MUTE
Vref
STANDBY
VCC1
SL-
SL+
GND
TR+
TR-
FO-
FO+
FO
FD
TO
+B
+B
+
+
+
+ +
+
+
+ +
-
-
-
-
-
-
-
-
-
-
- -
-
-
-
+
+
+B
+B
+B
+B
+
-
-
+
M
M
+
+ +
+
R54 68K
R53 68K
R52 68K
R51 68K
CNP1
R56
68K R55
68K
C6
100/10
C54
47/10 C55
0.01
C51
47/10
C53
0.001
R25
10K
C7
10/16
C8
0.1
R47
3.3
Q3
KTA1266GR
LASER DRIVER
R50
47
C14
0.33
C13
0.01
R42
120K
R3
100K
R4
10K
C11
0.47/6.3
R6
27K
R7
6.8K
R5
39K
C12
0.1
C18
3P
(CH)
C19
100/10
R8
330
R10
27K
C26
0.047
C22
100P
R80
1M
R79
1.5M
C24
2.2/50
C21
0.1
C23
0.047 R12
680
R11
12K
C2
7
0.1
C17
0.0047
R15
10K
C20
0.1
C42
68P
C25
0.1
C41
100/10
C28
47/10
C82
0.022
R
1
D93
DS1SS133 R43
220K
C47
100/16
C49
100/16
C50
100/16
C46
0.022
IC3
M63001FP
FOCUS/TRACKING/
SPIN/SLED DRIVER
R48
6.8K
C52
0.01
CNP2
CNP3
CNS3A CNS3B
M1
SPINDLE
MOTOR
M2
SLED
MOTOR
SW4
PICKUP IN
IC1
LA9235M
SERVO AMP.
CNS1A CNS1B
CNS2A CNS2B
CNP3A
13
2
5
8
4

– 19 –
CD-BA120/125
Figure 19 SCHEMATIC DIAGRAM (2/10)
78 9 10 11 12
• The numbers 1 to 13 are waveform numbers shown in page 14.
CD SIGNAL
RES
WRQ
CE
DO
CL
DI
DRF
INT
+B
XVDD
RVSS
RCHO
RVDD
XIN
51
50
49
48
47
63
62
61
60
59
58
57
56
55
54
53
52
XOUT
XVSS
ASLRCK
ASDACK
ASDFIN
LRSY
DATACK
DATA
16M
SFSY
SBSY
PW
64
SBCK
CE CL DI DO INT
WRQ
SERIAL
OUT
EXTERNAL AUDIO IN
DIGITAL FILTER
1BIT DAC
LPF
INTERPOLATION MUTE ATTENUATION DEEMPHASIS
CLOCK
GENERATOR
SUBCODE
DECODE
CRC
COMMAND
INTERFACE
AGND
R-CH
EMPH
MUTEL
MUTER
LVDD
LCHO
LVSS
+5V
DGND
1
2
3
4
5
+B
+B
CNS601
P20 1 - B
TO MAIN PWB
INT
DRF
WRQ
CE
DO
DI
CL
RES
DRF
GND
CD RES
DI
CLK
DO
CE
WRQ
CDINT
CLAMP SW
10
9
7
1
2
3
4
5
6
8
+B
+B
+B
P27 12 - B
CNS702
TO DISPLAY PWB
DISC_NO
O/C
GND(D)
M-
M+
CD LOADING
MOTOR PWB-E
TEST
DOUT
VDD C2F PCK
40
39
38
37
36
35
34
33
32
31
30
29
28
27
EFLG
41
FSX
CONT5 CONT4 CONT3 CONT2 CONT1 LASER
+B
+B
+B
1
32
L
OADING M-
V
CC4
L
D_M+
L
D_M-
L
OADING M+
SPDO
V
CC3
V
CC2(SPN)
S
P-
S
P+
S
PO
G
ND
+B
+B
JITTC
JITTV
EFMIN
EFBL
FDO
TDO
TBLO
BHREF
PHREF
ADAVSS
ADAVDD
VREF
TE
FE
PH(RFENV)
BH
TDO
SLDO SPDO
FDO
SPDO
FG(D_Vref)
SLDO
AUDIO
OUT
ERROR
CORRECT
GENERAL
SW
SERVO
PROCESSEROR
AUTO
ADJUST
S/H
JITER
DEFECT
CONTROL
A/DSW
D/A
+B
+B
5
4
3
2
1
PCKIST
VVDD
VVSS
PD02
PD01
73
80 79 78 77 76 75 74
FRAME SYNC
DEFECT,PROTECT
EFM DECODE
CLV
CONTROL
GENERAL
SLICE
LEVEL
CONTROL
PLL
VCEC
SLCO
SLCIST
HFL
FR
VDD5V
CONT7 CONT6 VSS V/vP FSEQ
DEFECT
EFMO
RES
DEF
O/C
DISC_NO
+B
72 71 70 69 68 67 66 65
11
10
9
8
7
6
24
23
22
21
20
19
18
17
16
15
14
13
12
-
+
+B
+
-
1
2
3
4
5
66
5
4
3
2
1
5
4
3
2
1
M
6
L-CH
+B
+B
46
45
44
43
42
+B
26
25
+B
C19
100/10
R8
330
R10
27K
C26
0.047
C22
100P
R80
1M
R79
1.5M
C24
2.2/50
C21
0.1
C23
0.047 R12
680
R14
1.2K
R11
12K
R13
680
C81
0.022
C27
0.1
C17
0.0047
R15
10K
C20
0.1
C42
68P
C25
0.1
C41
100/10
C28
47/10
C82
0.022
R44
1K
C29
0.1
D93
DS1SS133 R43
220K
R35
1K
R38
270
R39
470
R16
10K
R17 1K
R46 1K R45 1.2K R40 1.2K
C31
100/10
C30
0.1
L61
0.82µH
C64
0.47/6.3
ZD61
DZ3.9BSB
R19
47
C39
10/16
R58
220
Q1
2SC3203Y
CONSTANT VOLTAGE
C56
330/6.3
C83
0.022
R84
10K
C40
0.0015
C43
0.0015
R83
10K
C34
0.022
R82
2.2K
R81
2.2K
C38
10/16
R20
220
XL1
16.9344MHz
C45
100/10
C44
0.1
C80
0.1
R73 1K
R71 1K
C72 0.01 R72 1K
C71 100P
C73 100P
C75 100P
C76 100P
C77 100P
C78 100P
R75 1K
R76 1K
R77 1K
R78 1K
C74 100P R74 1K
L62
2.2µH
R94
10K
R95
10K
R67 1K R68 1K
IC2
LC78641E
SERVO/SIGNAL
CONTROL
CNP11
CNP12
CNP4
SW3
DISC
NUMBER
SW2
CLAMP
SW1
OPEN/
CLOSE
D21
DS1SS133
R21
470 R22
470
Q2
KRC102M
D22
DS1SS133
C47
100/16
BI4
CNS4
M3
T/T
UP/DOWN
LOADING
1
69
13
2
10
11
12
3
7
8

CD-BA120/125
– 20 –
A
B
C
D
E
F
G
H
123456
• NOTES ON SCHEMATIC DIAGRAM can be found on page 13.
Figure 20 SCHEMATIC DIAGRAM (3/10)
24 23 22 21 20 19 18 17 16
9
8
7
6
5
4
321
24
23
22
21
20
19
18
17
16
15
14
1312
11
10
9
8
7
6
5
4
3
2
1
+5V
GND
L
GND
R
M_GND
+B
+B
+B
TO POWER
PWB
P22 1 - G
(CD_GND)
(A_GND)
+5v +B
+B
+B
(1/4W)
CD_GND
L-CH
A_GND
R-CH
TAPE1_R
TAPE1_L
A_GND
A_GND
ERASE
TAPE2_R2
TAPE2_R1
TAPE2_L1
0V
0V 0.7V
3
1
7
6
5
4
3
2
1
2
3
1
2
L
R -
+
-
+
Hich=T1
+ +
-
-
Hich=CHROME
56K
112K
56K
112K
CD
TUN
DECK
AUX
LSEL0
- +
- +
- +
- +
- +
- +
-
+
-
+
CCB
INTERFACE
R1
R2
R3
R4
RSEL0
RIN
RTRE
RBASS
ROUT
VREF
VDD
CLK
L1
L2
L3
L4
LIN
LTRE
LBASS
LOUT
VSS
CE
DI
TAPE2_L2
3
1
2
5
4
3
1
2
5
4
U
V
W
X
Y
23
1
1
32
CNP11
TO CD SERVO
PWB
P19 12 - D
CNS102B
CNS102A
CNS101B
CNS101A
R-CH
L-CH
PLAYBACK
HEAD
TAPE1
RECORD/
PLAYBACK HEAD
TAPE2
R-CH
L-CH
ERASE
HEAD
3
1
2
3
1
2
7
6
5
4
3
2
1
7
6
5
4
3
2
1
7
6
5
4
3
2
1
FM SIGNAL
PLAYBACK SIGNAL
RECORD SIGNAL
CD SIGNAL
BI601
CNS601
Q602
KTC3199 GR
C602
0.001
C601
0.001
Q601
KTC3199 GR
R603
1.5K
R604
1.5K
R607
2.2K
R608
2.2K
R609
10K
R610
10K
R602
330
R601
330
C603
22/25 R625
22K
R615
3.9K
C607 10/50
C609 0.1
C611 0.1
C623
1/50
C629 1/50
C617 1/50
C613 0.0027
C625
1/50
C627
1/50
R617
1K
IC601
LC75341
AUDIOPROCESSOR
C630
1/50
C610 0.1
C612
0.1
C618
1/50
C614
0.0027
C608
10/50
C606
22/50
C628
1/50
C626
1/50
C624
1/50
LUG1
MECHA BASE GND
R102
10K
R101
10K R103
4.7K
Q101
KTA1266 GR
C101
0.047
R157
100
Q102
KRC104 M
C108
100/16
R104
1K
R137
15K
Q103
KRC104 M
C103
560P
C102
560P
CNP101
Q104
2SC1845
C104
180P
R105
1K
R106
2.2K
R110 47K
R108
3.3K
Q106
2SC1845
CNP102
Q105
2SC1845
C105
180P R107
2.2K
R109
3.3K
Q107
2SC1845
R113 47K
Q109 KTC3199 GR
C107
560P
R111 4.7K
R112 4.7K
C106 560P
Q108 KTC3199 GR
C123
1/50
R123
5.6K
C121
560P
R119
100K R121
3.9K
C119
0.033/25
C117
100/16
C115
330P
C137
0.022
R125 33K
R138
15K
R117
56
R115
1K
C113
330P
C147 0.001
R131 1.5K
C131 0.022
R127 6.8K
C133 0.0033
R129 8.2K
C
4
C129
22/25
C127 270
R133 100
C139
3.3/50
C146 0.001
C122
1/50
C116
100/25
C120
560P
R120
3.9K
C118
0.033/25
R118
100K
R124
33K
C128
22/25
R128 6.8K
C126 270
R132 1.5K
R126 68K
C134
R134 100
C112
330P
C130 0.022
R130 8.2K
R116
56
C114
330P
C132 0.0033
R114
1K
R122
5.6K
R140
10K
Q110
KTC3199 GR
R142
220K
IC101
AN7345K
IC101:PLAYBACK AND RECORD AMP.