Sharp CD-BA1200H User manual

– 1 –
CD-BA1200H
CD-BA1200H
No. S4029CDBA1200
CONTENTS Page
SAFETY PRECAUTION FOR SERVICE MANUAL ........................................................................................................... 2
IMPORTANT SERVICE NOTES (FOR U.K. ONLY) .......................................................................................................... 3
SPECIFICATIONS ............................................................................................................................................................. 3
NAMES OF PARTS ........................................................................................................................................................... 4
OPERATION MANUAL ...................................................................................................................................................... 6
QUICK GUIDE ................................................................................................................................................................... 7
DISASSEMBLY.................................................................................................................................................................. 9
REMOVING AND REINSTALLING THE MAIN PARTS................................................................................................... 12
ADJUSTMENT ................................................................................................................................................................. 13
NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 15
WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 16
BLOCK DIAGRAM ........................................................................................................................................................... 17
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD............................................................................................. 20
VOLTAGE ........................................................................................................................................................................ 36
TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 37
FUNCTION TABLE OF IC................................................................................................................................................ 41
FL DISPLAY..................................................................................................................................................................... 47
REPLACEMENT PARTS LIST/EXPLODED VIEW
PACKING METHOD (FOR U.K. 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-BA1200H Mini Component System consisting of
CD-BA1200H(mainunit)andCP-BA1200H(speakersystem).
• Note for users in U.K.
Recording and playback of any material may require consent
which SHARP is unable to give. Please refer particularly to the
provisions of Copyright Act 1956, the Dramatic and Musical
Prefomers Protection Act 1956, the Preformers Protection Acts
1963 and 1972 and to any subsequent statutory enactments and
orders.
SHARP CORPORATION

CD-BA1200H
– 2 –
SAFETY PRECAUTION FOR
SERVICEMANUAL
Precaution to be taken when replacing and servicing the
Laser Pickup.
The AEL (Accessible Emission Level) of Laser Power Output
forthismodelisspecifiedtobelowerthanClassIRequirements.
However, the following precautions must be observed during
servicing to protect your eyes against exposure to the Laser
beam.
(1) When the cabinet has been removed, the power is turned
on without a compact disc, and the Pickup is on a position
outerthanthelead-inposition,theLaserwilllightforseveral
seconds to detect a disc. Do not look into the Pickup Lens.
(2) The Laser Power Output of the Pickup inside the unit and
replacementservicepartshavealreadybeenadjustedprior
to shipping.
(3) No adjustment to the Laser Power should be attempted
when replacing or servicing the Pickup.
(4) Under no circumstances look directly into the Pickup Lens
at any time.
(5)CAUTION -Useofcontrolsor adjustments,orperformance
of procedures other than those specified herein may result
in hazardous radiation exposure.
(For U.K.)
(Except for U.K.)
CAUTION-INVISIBLE LASER RADIATION WHEN OPEN. DO NOT STARE INTO
BEAM OR VIEW DIRECTLY WITH OPTICAL INSTRUMENTS.
VARNING-OSYNLIG LASERSTRALNING NAR DENNA DEL AR OPPNAD. STIRRA
EJ IN I STRALEN OCH BETRAKTA EJ STRALEN MED OPTISKA INSTRUMENT.
ADVERSEL-USYNLIG LASERSTRALING VED ABNING. SE IKKE IND I
STRALEN-HELLER IKKE MED OPTISKE INSTRUMENTER.
VARO! AVATTAESSA OLET ALTTIINA NAKYMATON LASERSATEILYLLE.
ALA TUIJOTA SATEESEEN ALAKA KATSO SITA OPTISEN LAITTEEN LAPI.
VARNING-OSYNLIG LASERSTRALNING NAR DENNA DEL AR OPPNAD.
STIRRA EJ IN I STRALEN OCH BETRAKTA EJ STRALEN GENOM OPTISKT
INSTRUMENT.
ADVERSEL-USYNLIG LASERSTRALING NAR DEKSEL APNES. STIRR IKKE
INN I STRALEN ELLER SE DIREKTE MED OPTISKE INSTRUMENTER.
VAROITUS! LAITTEEN KÄYTTÄMINEN MUULLA KUIN
TÄSSÄ
KÄYTTÖOHJEESSA MAINITULLA TAVALLA SAATTAA
ALTISTAA KÄYTTÄJÄN TURVALLISUUSLUOKAN 1
YLITTÄVÄLLENÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE.
VARNING- OMAPPARATENANVÄNDS PÅ ANNAT SÄTT
ÄN I DENNA BRUKSANVISNING SPECIFICERAS. KAN
ANVÄNDAREN UTSÄTTAS FÖR OSYNLIG
LASERSTRÅLNING, SOM ÖVERSKRIDER GRÄNSEN
FÖR LASERKLASS 1.
Laser Diode Properties
Material: GaAIAs
Wavelength: 780 nm
Emission Duration: continuous
Laser Output: max. 0.6 mW

– 3 –
CD-BA1200H
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
Specifications for this model are subject to change without
prior notice.
SPECIFICATIONS
CD-BA1200H
CP-BA1200H
IMPORTANT SERVICE NOTES (FOR U.K. ONLY)
Beforereturningthe unit tothecustomer aftercompletionof a
repairor adjustmentit isnecessaryforthefollowingwithstand
voltage test to be applied to ensure the unit is safe for the
customer to use.
Setting of Withstanding Voltage Tester and set.
Set name set value
Withstanding Voltage Tester
Test voltage 4,240 VPEAK
3,000 VRMS
Set time 6 secs
Set current (Cutoff current) 4 mA
Unit
Judgment
OK: The “GOOD” lamp lights.
NG: The “NG” lamp lights and the buzzer sounds.
SHORT-CIRCUIT
AC POWER
SUPPLY CORD
CONNECT THE PROBE
TO GND OF CHASSIS
SCREW
PROBE
AC
UNIT
WITHSTANDING
VOLTAGE TESTER
+
-
OUT
CHASSIS SCREW
General
Power source: AC 230 V, 50 Hz
Power consumption: 32 W
Dimensions: Width; 270 mm (10-5/8")
Height; 300 mm (11-13/16")
Depth; 373 mm (14-11/16")
Weight: 5.0 kg (11.0 lbs.)
Amplifier section
Output power:
(For U.K.) RMS; 20 W (10 W + 10 W)
(10 % T.H.D.)
(DIN 45 324)
(0.9 % T.H.D.)
RMS; 14.6 W (7.3 W + 7.3 W)
RMS; 20 W (10 W + 10 W)
(DIN 45 324)
(DIN 45 500)
RMS; 14.6 W (7.3 W + 7.3 W)
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; 522-1,620 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:
(For U.K.) 0.3 % (WRMS)
Type: 10 cm (4") full-range speaker
Maximum input power: 20 W
Rated input power: 10 W
Impedance: 8 ohms
Dimensions: Width; 220 mm (8-11/16")
Height; 300 mm (11-13/16")
Depth; 180 mm (7-1/16")
Weight: 2.0 kg (4.4 lbs.)/each
Output power:
(Except For U.K.) PMPO; 64 W
MPO; 32 W (16 W + 16 W)
Wow and flutter:
(Except For U.K.) 0.35 % (DIN 45 511)

CD-BA1200H
– 4 –
NAMES OF PARTS
CD-BA1200H
Front panel
1. (CD) Disc Tray
2. (CD) Disc Skip Button
3. (CD) Track Down/Review Button
(TUNER) Preset Down Button
(TAPE 2) Rewind Button
4. (CD) Track Up/Cue Button
(TUNER) Preset Up Button
(TAPE 2) Fast Forward Button
5. Timer Set Indicator
6. On/Stand-by Button
7. Timer/Sleep Button
8. Clock Button
9. Function Selector Buttons
10. Equalizer Mode Selector/Extra Bass/Demo Mode
Button
11. Volume Up/Down Buttons
12. (CD) Open/Close Button
13. Headphone Socket
14. Memory/Set Button
15. (CD/TAPE) Stop Button
16. (CD) Play/Repeat Button
(TAPE) Play Button
17. (TAPE 2) Record Pause Button
18. Tuning and Time Up/Down Buttons
30. (TAPE 1) Cassette Compartment
31. (TAPE 2) Cassette Compartment
19. (CD) Disc Number Indicators
20. Timer Indicator
21. Record Indicator
22. Sleep Indicator
23. Extra Bass Indicator
24. (CD/TUNER) Memory Indicator
25. FM Stereo Mode Indicator
26. FM Stereo Indicator
27. (CD) Repeat Indicator
28. (CD/TAPE) Play Indicator
29. (CD) Pause Indicator
19 20 21 22 23 24 25 26
292827
2
134
5
610
11
12
7
8
9
13 14 15
30 31
16 17 18
Rear panel
1. AC Power Input Socket
2. Speaker Terminals
3. FM 75 Ohms Aerial Socket
4. AM Loop Aerial Socket
1
2
3
4

– 5 –
CD-BA1200H
CP-BA1200H
CD-BA1200H
1. Full-Range Speaker
2. Bass Reflex Duct
3. Speaker Wire
1
2
3
1. Remote Control Transmitter LED
CD control section
2. Disc Number Select Buttons
3. Memory Button
4. Pause Button
5. Clear Button
6. Track Down/Review Button
7. Track Up/Cue Button
8. Disc Skip Button
9. 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
1
9
10
11
12
151413 161718
3
28
4
5
6
7
19
20
21 23
22
Remote control

CD-BA1200H
– 6 –
OPERATION MANUAL
SETTING THE CLOCK
In this example, the clock is set for the 24-hour (0:00) 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.
Note that this can only be set when the unit is first installed or it has been reset.
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 con- tinuously. When the 12-hour display is selected, "AM" will change automatically 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 lead 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 "RESETTING THE MICROCOM-
PUTER".
2 Perform steps 1 - 9 above.
(Main unit operation)
"0:00" The 24-hour display will appear.
(0:00 - 23:59)
"AM 0:00" The 12-hour display will appear.
(AM 0:00 - PM 11:59)
"AM 12:00" The 12-hour display will appear.
(AM 12:00 - PM 11:59)
ON/
STAND-BY
CLOCK
MEMORY/SET
TUNING/TIME ( )
AM 0:000:00 AM 12:00
REMOTE CONTROL
RESETTING THE MICROCOMPUTER
Notes concerning use:
Replace the batteries if the operating distance is reduced or if the operation becomes erratic. Periodically clean the transmitter LED on the remote con- trol and the sensor on the main unit with a soft cloth. Exposing the sensor on the main unit to strong light may interfere with operation. Change the lighting or the direc- tion of the unit. Keep the remote control away from moisture, excessive heat, shock, and vibrations.
15
15
0.2 m - 6 m (8" - 20')
Reset the microcomputer under the following condi- tions:
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
Whilst 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
ON/
STAND-BY

– 7 –
CD-BA1200H
Check the supplied accessories
AM loop aerial ×1
FM aerial ×1
Remote control ×1
AC power lead ×1
Putting batteries into the remote control
Placing the system
10 cm (4")
10 cm (4") 10 cm (4")
10 cm (4")
2 "AA" size batteries (UM/SUM-3, R6, HP-7 or similar)
1
Remove the battery cover.
2
Insert the batteries.
3
Replacethe battery cover.
1
2
3
[For U.K.]
AC power lead ×1
[Except for U.K.]
Left speaker
Black
Connections
4
AC 230 V, 50 Hz
1
Connect the AM and FM aerials.
2
Connect the speaker system.
3
Connect the AC power lead.
Right speaker
AM loop aerial
FM aerial
1
2
Red
[For U.K.] [Except for U.K.]

CD-BA1200H
– 8 –
7
Listening to a tape
1
Press the ON/STAND-BY button to turn the power on.
4
Press the TAPE (1 2) button to select the TAPE 1 or TAPE 2.
3
Load the cassette into the TAPE 1 or TAPE 2 cassette compartment.
2
Open the cassette door by pushing the area marked "PUSH EJECT".
5
Press the button to start playback.
1
Press the ON/STAND-BY button to turn the power on.
2
Press theTUNER (BAND) button to select FM ST, FM or AM.
4
Adjust the sound volume using the VOLUME buttons.
6
Adjust the sound volume using the VOLUME buttons.
3
Press the TUNING/TIME ( or ) button to tune in- to the desired station.
45
Listening to the radio
6
1
Press the ON/STAND-BY button to turn the power on.
2
Press the CD button.
3
PresstheOPEN/CLOSE buttonto open the disctray.
4
Place the CD(s) on the disc tray, label side up.
5
When loading a third disc, press the DISC SKIP button to turn the disc tray, then place the CD in the open pos- ition.
6
Press the OPEN/CLOSE button to close the disc tray.
Listening to a CD
5
7
Press the button.
12 cm (5") 8 cm (3")
8
Adjust the sound volume using the VOLUME buttons.
And then, close the cassette door completely until it is locked.
TAPE 1 TAPE 2
PUSH
EJECT PUSH
EJECT
3
2
3
2
1 45
6
14
3
1 2
3,6
5
7
8
2
Resetting the microcomputer
1Press the ON/STAND-BY button to enter the stand-by
mode.
2Whilst 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.
If this product is subjected to strong external interference (mechanical shock, excessive static electricity, abnormal supply voltage due to lightning, etc.) or if it is operated in- correctly, it may malfunction or the display may not functi- on correctly. If such a problem occurs, do the following:
CD pickup cleaning
1Press the ON/STAND-BY button to turn the power on.
3Press the CD button and load the desired disc.
2
Load a cassette into the TAPE 2 cassette compartment.
4Press the REC PAUSE button. 5Press the button.
Recording from CDs
8
Clean the dust or stain on the CD pickup lens using a commercial cleaning disc (brush type).
Cleaning disc
TAPE 2
PUSH
EJECT
4 5 2 2
2
1 3
1,2

– 9 –
CD-BA1200H
1 Top Cabinet 1. Screw ..................... (A1) x4 9-1
2 Side Panel 1. Screw ..................... (B1) x4 9-1
(Left/right)
3 CD Player Unit/ 1. Turn on the power supply, 9-2
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 Rear Panel 1. Screw ..................... (D1) x6 9-2
5 Main/Headphones 1. Screw........................ (E1) x8 10-2
PWB 2. Socket .................... (E2) x4
3. Flat Cable .............. (E3) x1
4. Tip .......................... (E4) x1
6 Front Panel 1. Screw ..................... (F1) x3 10-2
7 Display PWB 1. Screw ..................... (G1) x9 10-3
2. Flat Cable .............. (G2) x1
8 Tape Mechanism 1. Open the cassette holder. 10-3
2. Screw...................... (H1) x5
9 Turntable 1. Hook....................... (J1) x2 10-4
2. Cover ..................... (J2) x1
10 Disc Tray 1. Turn fully the lock lever in the 9-3
arrow direction.
2. While holding the lock lever, rotate 10-1
the cam gear until the cam gear
rib engages with the clamp lever.
3. Push the slide holder backward to 10-5
engage the claw with the groove
and remove it in the direction
of the arrow. .............. (K1) x6
11 CD Servo PWB 1. Screw ..................... (L1) x1 10-6
(Note 2) 2. Hook....................... (L2) x2
3. Socket .................... (L3) x4
12 CD Mechanism 1. Hook....................... (M1) x2 11-1
2. Hook....................... (M2) x3
13 Loading Motor PWB 1. Hook....................... (N1) x5 11-1
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.Takeoff nylonbandsor wireholderswhere theyneedto
beremovedwhendisassemblingtheunit.Afterservicing
theunit,be suretorearrange the leadswherethey were
before disassembling.
4. Take sufficient care on static electricity of integrated
circuits and other circuits when servicing.
Figure 9-2
Figure 9-3
CD-BA1200H
STEP REMOVAL PROCEDURE FIGURE
Note 1:
How to open the changer manually. (Fig. 9-3)
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. 10-1)
3. After that, push forward the CD slide holder.
Note 2:
1.Afterremoving theconnectorfortheoptical pickupfromthe
connector, wrap the conductive aluminium foil around the
front end of the connector to protect the optical pickup from
electrostatic damage.
Figure 9-1
CD-BA1200H
Note 3:
1. Be careful not to break the claw of the CD mechanism.
2.Whenfining backthe camgearassembly, letit lockbyfront
movement.
(B1)x1
ø3x10mm
(B1)x1
ø3x10mm
Side Panel
(Right)
Side Panel
(Left)
Top Cabinet
Rear
Panel
(A1)x2
ø3x12mm
(A1)x2
ø3x12mm
(B1)x2
ø3x12mm
(C3)x1
(C1)x1
ø3x12mm
(D1)x6
ø3x8mm
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 Player Unit
(Bottom View)

CD-BA1200H
– 10 –
Figure 10-2
Figure 10-3
Figure 10-4
Figure 10-5
Figure 10-6
Turntable
Disc Tray
(J2) x1
CD Player Unit
(J1) x2
1
2
(K1) x3
(K1) x3
(L3) x2
(L2) x2
(L3) x2
CD Servo
PWB Slide Chassis
(L1)x1
ø3x8mm
(E2)x2
(E2)x1
(E2)x1
(E3)x1
Headphones
PWB
(E1)x7
ø3x10mm
Main PWB
(E1)x1
ø3x10mm
(E4)x1
(F1)x3
ø3x8mm
(G1)x9
ø3x10mm
(G2)x1
(H1)x5
ø3x10mm
Display PWB
Open
Cassette
Holder
Tape
Mechanism
Clamp Lever
CD Player Unit
(Top View)
Cam Gear Rib
Figure 10-1

– 11 –
CD-BA1200H
CP-BA1200H
CP-BA1200H
Figure 11-2
Figure 11-1
Figure 11-3
(M2) x3
(M1) x1
(N1) x5
(M1) 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 11-2
2. Duct Panel .............. (A2) x1
3. Screw......................(A3) x4 11-3

CD-BA1200H
– 12 –
REMOVING AND REINSTALLING THE MAIN PARTS
TAPE MECHANISM SECTION
Perform steps 1 to 6 and 8 of the disassembly method to
remove the tape mechanism.
How to remove the record/playback and erase
heads (TAPE 2) (See Fig. 12-1)
1.Carefullyremovetherecord/playbackheadanderasehead
screw (A1) x 2 pcs.
How to remove the playback head (TAPE 1)
(See Fig. 12-2)
1. Carefully remove the playback head screw (B1) x 2 pcs.
How to remove the pinch roller (TAPE 1/2)
(See Fig. 12-3)
1. Carefully bend the pinch roller pawl in the direction of the
arrow <A>, and remove the pinch roller (C1) 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 (TAPE 2) (See Fig. 12-4)
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 1) (See Fig. 12-4)
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. 12-5)
1. Remove the screws (F1) x 2 pcs., to remove the motor.
Figure 12-1
Figure 12-2
Figure 12-3
Figure 12-4Figure 12-5
TAPE 2 TAPE1
Main Belt
(E1)x1
TAPE2
Main Belt
(D1)x1
TAPE 1
FF/REW
Belt
(D2)x1
FF/REW
Belt
(E2)x1
Motor
Motor
(D1)x1
(E1)x1
(A1)x2
Ø2 x 9mm
TAPE 2
Record/Playback
Head
Erase Head
(B1)x1
Ø2x9mm
(B1)x1
Ø2x5mm
TAPE 1
Playback
Head
Pinch Roller
(C1)x1 <A>
Pull
<B>
Pull
Pinch
Roller
Pawl
(F1) x2
Ø 2.6 x 5mm
Motor

– 13 –
CD-BA1200H
How to remove the pickup (See Fig. 13-2)
1.Removethe screws (B1)x2 pcs., toremovethe shaft (B2).
2. Remove the stop washer (B3) x 1 pc., to remove the gear
(B4).
3. Remove the pickup.
Figure 13-2
CD MECHANISM SECTION
Perform steps 1, 2, 3, 9 and 12 of the disassembly method to
remove the CD mechanism.
How to remove the loading motor
(See Fig. 13-1)
1. Bend the hooks (A1) x 5 pcs., to remove the loading motor.
Figure 13-1
Note
After removing the connector for the optical pickup from the
connector, wrap the conductive aluminium foil around the
front end of connector to protect the optical pickup from
electrostatic damage.
(A1)x2
(A1)x1
Loading Motor
Slide Chassis
(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 13-3
TAPE MECHANISM
Motor
Variable Resistor
in motor

CD-BA1200H
– 14 –
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-range frequency
AM IF 450 kHz 1,620 kHz T351 *1
AM Band — 522 kHz (fL): T306 *2
Coverage 1.1 ±0.1 V
AM Tracking 990 kHz 990 kHz (fL): T303 *1
Figure 14-1 ADJUSTMENT POINTS
Test Stage Frequency Frequency
Display Setting/
Adjusting
Parts
Instrument
Connection
T306
T303
R357
TP301
TP302
T351
AM IF
AM
TRACKING fL
AM BAND
COVERAGE fL
FE301
SO301
FM ANTENNA
TERMINAL CNP302
AM LOOP
ANTENNA MAIN PWB
1
R381
Figure 14-2
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)Offsetadjustment(The offset voltagebetweenthe 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 Fig.
14-2 EFBL)
(3)Gain adjustment(Thegainiscompensated insidetheIC
sothatthe loop gainatthe gaincrossoverfrequency 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
• FM
Notes:
1: Description of the "FM IF Adjustment" is not carried on this
Manual. It is because the IF coil in the FM front end section
has been best adjusted in the factory so that its further
adjustment is not needed at the field. When replacing the
FM front end assembly, no adjustment is needed either.
2: The parts in the FM front end section are prepared in a
complete unit, so you can't obtain each part individually

– 15 –
CD-BA1200H
•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
SW724 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 ON/STAND-BY ON—OFF
SW702 CLOCK ON—OFF
SW703 TIMER/SLEEP ON—OFF
SW709 DISC SKIP ON—OFF
SW710 OPEN/CLOSE ON—OFF
SW711 EQUALIZER/X-BASS/DEMO ON—OFF
SW712 VOLUME UP ON—OFF
SW713 VOLUME DOWN ON—OFF
Figure 15 TYPES OF TRANSISTOR AND LED
(1) (2) (3)
(S) (G) (D)
E C B
FRONT
VIEW
2SC1845 F
2SC3331
2SC380 O
KTA1266 GR
KTA1271 Y
KTA1273 Y
KTC3203 Y
KRC102 M
KRC104 M
KRC107 M
KTC2026 4204SRT7
BCE
FRONT
VIEW
FRONT
VIEW

CD-BA1200H
– 16 –
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

– 17 –
CD-BA1200H
Figure 17 BLOCK DIAGRAM (1/3)
CNP12
CNP11
Q2
+3.3V
+5V
CONT5
CONT2 CONT3 CONT4 CONT7 CONT6
SLDO
SPDO
FDO
TDO
+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 RFENV 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/SLED DRIVER
IC1
LA9235M
SERVO AMP.
TO MAIN SECTION
(TO IC601)
R-CH
L-CH AGND DGND +5V(+B4)
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-BA1200H
– 18 –
Figure 18 BLOCK DIAGRAM (2/3)
FMAFC
BALUN
L341
REC/PLAY
CL
CE
DI
SYSTEM
MUTE
DO CL DI CE
MO/ST
+B3
SWITCHING
+B3
FM/AM
PLL(TUNER)
LC72131
IC302
OUT
FM/AM
+B3
L
R
BAIS
T1/T2
MUTING
Q110
Q111
P.B.
REC
ACBIAS
L
L
R
R
R
L
TAPE
TUNER
CD
PB
CNS601
CNP11
FROMCDSECTION
HEAD
ERASE
SWITCHING
SWITCHING
SWITCHING
BIAS
Q102
Q103
Q101
Q113
SWITCHING
Q112
L103
BIAS
OSC
L104
Q114
Q109
Q108
Q
RECPBHEAD
TAPE2
PBHEAD
TAPE1
R-CH
L-CH
R-CH
L-CH
IC601
LC75341
AUDIOPROCESSOR
+B3
R
L
REC
R
L
LNF
RNF
ALC
REF
RREC
LREC
POP
REDUCE
RNF
LNF
SWITCHING
Q107
Q104~
L(T2)
R(T2)
R(T1)
L(T1)
/PLAYBACKAMP.
PLAYBACKANDRECORD
IC101
AN7345K
R
L
FM/AMMPXIN
STEREO
AMRFIN
AMOSCIN
FM +B Q360
VT
FMOSC
OSC
4.5MHZ
X352
COVERAGE
AM BAND
AM TRACKING
T303
Q301 X351
456kHz
MO/ST
VCO
DET
FMFM+B
GND
AM IF
CF351
FM IF DET./FM MPX./AM IF
LA1832S
IC303
MIX
CF352T351
CF302
CF301
FM FRONT END
TA7358AP
FE301
AM LOOP
ANTANNA
FM
ANTENNA
11
7
75
6
1
234
8
22
3
21
4
24
2
1
818
17
5
4
3
910
18
1
16
3
15
10
9
7
23
14
12
13
1
2
20
19
7
18
10
8
17
13
21
4
5
2
24
23
6
9
16
12
15
1
5
13
1
2
7
9817
6
21
20 22
17
16
15
13
14
12
15
16
23
4
H/N
P.B
REC
T1/T2
T1/T2HIGH
NOR/
Q602
Q601
5
242122
AM
T306
FM
4
TAPE
MOTOR
SOLENOID
T2 PLAY
T1 PLAY
R.PLAY
F.PLAY
Q706
Q704
Q705
IC701
54PIN
IC701
53PIN
IC701
56PIN
IC701
55PIN
M
MOTOR
DRIVER
+2B
+2B
AM IF
12
14

– 19 –
CD-BA1200H
Figure 19 BLOCK DIAGRAM (3/3)
+B2
JK901
HEADPHONES
RESET
Q904
M10V
+B2
D806
+5V
Q803
+B6UNSWITCH
5V
RL801
D802~805
PT802
SUB POWER
TRANSFORMER
L801
LINE
FILTER
SO902
AC INPUT
PT801
MAIN POWER
TRANSFORMER
REC/PLAY
VLOAD
+B6
RESET IC
SYS.STOP
RESET
IC704
KIA7042PA
Q707
TERMINAL
SPEAKER
SO901
+B6 +B6
+B6
+B6
VDD VDD VDD
R-OUT
L-OUT
SP.DET. Q902
Q901
+5V
A10V
+B4
+B3
IC904
KIA7810AP
VOLTAGE
REGULATOR
IC903
AN7805
CONSTANT
VOLTAGE REGULATOR
IC902
SYSTEM
MUTE
CE DI CL DO
+B1
+B3
XL701
4.1943 MHz
D911 D914
D907 910
F901
T2.5A L 250V
Vcc
L
RPOWER
AMP.
LA4282
IC901
BAIS
T1/T2
AVDD
SW723-SW725
SW709-SW721
SW701-SW703
KEY
SECTION
TO CD
Q701
SUPPLY CORD
AC 230V,50Hz
AC POWER
T.F.
IC701
IX0337AW
SYSTEM
MICROCOMPUTER
DISPLAY
FL701
17
9
7
2
31
7
1
4
Q602
Q601
12310 11 13 15 16 19 20 22 26 14 17 18 21 27 30 31 32 33
71
78
79
80
91
92
99
100
145610 11 12 13 15 16 20 21 22 23 24
39
38
37
36
35
34
33
31
404142434445464748495051525354
5556
575859
11
9
4
10
2
5
L
R
F902
T1.6A L 250V
VF1
VF2
KIA7810AP
VOLTAGE
REGULATOR
Q903
5W
+B5

CD-BA1200H
– 20 –
Figure 20 SCHEMATIC DIAGRAM (1/10)
A
B
C
D
E
F
G
H
123456
• NOTES ON SCHEMATIC DIAGRAM can be found on page 15.
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
B
P
A
A
D
PH(R
F
TDO FDO
P
S
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
R1
1.2
R11
12K
R1
3
68
0
C
8
0.0
2
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
C2
9
0.1
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
7
8
4