Sharp CD-BA1200H Service Manual
CD-BA1200H
SERVICE MANUAL
No. S4029CDBA1200
CD-BA1200H
CD-BA1200H Mini Component System consisting of
CD-BA1200H (main unit) and CP-BA1200H (speaker system).
• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.
• 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.
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)
SHARP CORPORATION
– 1 –
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
CD-BA1200H
SAFETY PRECAUTION FOR
SERVICE MANUAL
Precaution to be taken when replacing and servicing the
Laser Pickup.
The AEL (Accessible Emission Level) of Laser Power Output
for this model is specified to be lower than Class I Requirements.
However, the following precautions must be observed during
servicing to protect your eyes against exposure to the Laser
beam.
(1) When the cabinet has been removed, the power is turned
on without a compact disc, and the Pickup is on a position
outer than the lead-in position, the Laser will light for several
seconds to detect a disc. Do not look into the Pickup Lens.
(2) The Laser Power Output of the Pickup inside the unit and
replacement service parts have already been adjusted prior
to shipping.
(3) No adjustment to the Laser Power should be attempted
when replacing or servicing the Pickup.
(4) Under no circumstances look directly into the Pickup Lens
at any time.
(5) CAUTION - Use of controls or adjustments, or performance
of procedures other than those specified herein may result
in hazardous radiation exposure.
(For U.K.)
(Except for U.K.)
Laser Diode Properties
Material: GaAIAs
Wavelength: 780 nm
Emission Duration: continuous
Laser Output: max. 0.6 mW
– 2 –
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
YLITTÄVÄLLE NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE.
VARNING - OMAPPARATENANVÄNDS PÅ ANNAT SÄTT
ÄN I DENNA BRUKSANVISNING SPECIFICERAS. KAN
ANVÄNDAREN UTSÄTTAS FÖR OSYNLIG
LASERSTRÅLNING, SOM ÖVERSKRIDER GRÄNSEN
FÖR LASERKLASS 1.
IMPORTANT SERVICE NOTES (FOR U.K. ONLY)
CHASSIS SCREW
Before returning the unit to the customer after completion of a
repair or adjustment it is necessary for the following withstand
voltage test to be applied to ensure the unit is safe for the
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.
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
CD-BA1200H
WITHSTANDING
VOLTAGE TESTER
AC
+
OUT
-
SHORT-CIRCUIT
AC POWER
SUPPLY CORD
PROBE
UNIT
CONNECT THE PROBE
TO GND OF CHASSIS
SCREW
CD-BA1200H
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.)
Output power:
(Except For U.K.)
Output terminals: Speakers; 8 ohms
RMS; 20 W (10 W + 10 W)
(10 % T.H.D.)
RMS; 14.6 W (7.3 W + 7.3 W)
(0.9 % T.H.D.)
PMPO; 64 W
MPO; 32 W (16 W + 16 W)
(DIN 45 324)
RMS; 20 W (10 W + 10 W)
(DIN 45 324)
RMS; 14.6 W (7.3 W + 7.3 W)
(DIN 45 500)
Headphones; 16-50 ohms
(recommended; 32 ohms)
SPECIFICATIONS
Cassette deck section
Frequency response: 50-14,000 Hz (Normal tape)
Signal/noise ratio: 55 dB (TAPE 1, playback)
Wow and flutter:
(For U.K.)
Wow and flutter:
(Except For U.K.)
CP-BA1200H
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")
Weight: 2.0 kg (4.4 lbs.)/each
Specifications for this model are subject to change without
prior notice.
50 dB (TAPE 2, recording/playback)
0.3 % (WRMS)
0.35 % (DIN 45 511)
Height; 300 mm (11-13/16")
Depth; 180 mm (7-1/16")
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
– 3 –
CD-BA1200H
CD-BA1200H
NAMES OF PARTS
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
1
2
34
5
6
7
8
9
13 14 15
16 17 18
19 20 21 22 23 24 25 26
10
11
12
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
30. (TAPE 1) Cassette Compartment
31. (TAPE 2) Cassette Compartment
Rear panel
1. AC Power Input Socket
2. Speaker Terminals
3. FM 75 Ohms Aerial Socket
4. AM Loop Aerial Socket
292827
30 31
– 4 –
1
2
3
4
CD-BA1200H
CD-BA1200H
Remote control
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
28
3
4
5
6
9
10
11
12
7
151413 161718
19
20
21
23
22
CP-BA1200H
1. Full-Range Speaker
2. Bass Reflex Duct
3. Speaker Wire
1
2
3
– 5 –
CD-BA1200H
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 ME MORY/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.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.
EQUALIZER
X-BASS/
DEMO
ON/
STAND-BY
OPERATION MANUAL
– 6 –
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
Replace the 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.]
– 7 –
CD-BA1200H
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 the TUNER (BAND) button to select FM ST, FM
or AM.4Adjust 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
Press the OPEN/CLOSE button to open the disc tray .
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
4
5
6
1
4
3
1
2
3,657
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 er ase 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
– 8 –
DISASSEMBLY
Lock Lever
CD Player Unit
(Bottom View)
Caution on Disassembly
Follow the below-mentioned notes when disassembling
the unit and reassembling it, to keep it safe and ensure
excellent performance:
1. Take cassette tape and compact disc out of the unit.
2. Be sure to remove the power supply plug from the wall
outlet before starting to disassemble the unit.
3. Take off nylon bands or wire holders where they need to
be removed when disassembling the unit. After servicing
the unit, be sure to rearrange the leads where they were
before disassembling.
4. Take sufficient care on static electricity of integrated
circuits and other circuits when servicing.
CD-BA1200H
STEP REMOVAL
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
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 ........................
PWB 2. Socket .................... (E2) x4
6 Front Panel 1. Screw ..................... (F1) x3 10-2
7 Display PWB 1. Screw .....................
8 Tape Mechanism 1. Open the cassette holder. 10-3
9 Turntable 1. Hook....................... (J1) x2 10-4
10 Disc Tray 1.
11 CD Servo PWB 1. Screw ..................... (L1) x1 10-6
(Note 2) 2. Hook ....................... (L2) x2
12 CD Mechanism 1. Hook....................... (M1) x2 11-1
13
Loading Motor PWB
3. Flat Cable .............. (E3) x1
4. Tip .......................... (E4) x1
2. Flat Cable .............. (G2) x1
2. Screw...................... (H1) x5
2. Cover ..................... (J2) x1
arrow direction.
2.
3.
3. Socket .................... (L3) x4
2. Hook....................... (M2) x3
1. Hook....................... (N1) x5 11-1
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.
3. After that, push forward the CD slide holder.
Note 2:
1. After removing the connector for the optical pickup from the
connector, wrap the conductive aluminium foil around the
front end of the connector to protect the optical pickup from
electrostatic damage.
PROCEDURE
open the disc tray, take out the
CD cover, and close. (Note 1)
(E1) x8 10-2
(G1) x9
Turn fully the lock lever in the
While holding the lock lever, rotate
the cam gear until the cam gear
rib engages with the clamp lever.
Push the slide holder backward to
engage the claw with the groove
and remove it in the direction
of the arrow. ..............
(K1) x6
FIGURE
10-3
10-1
10-5
(Fig. 10-1)
9-3
CD-BA1200H
CD-BA1200H
(A1)x2
ø3x12mm
Side Panel
(Right)
(B1)x1
ø3x10mm
(B1)x2
ø3x12mm
Rear
Panel
Figure 9-1
CD Servo
PWB
(C3) x1
Pull
Rear
Panel
(C1)x1
ø3x12mm
(C4)x2
(D1)x6
ø3x8mm
Figure 9-2
Figure 9-3
Note 3:
1. Be careful not to break the claw of the CD mechanism.
2. When fining back the cam gear assembly, let it lock by front
movement.
Top Cabinet
(A1)x2
ø3x12mm
Side Panel
(Left)
(B1)x1
ø3x10mm
CD Tray Cover
(C2) x3
1
1
2
CD Player
Unit
(C3)x1
Main PWB
– 9 –
CD-BA1200H
(L3) x2
(L2) x2
(L3) x2
CD Servo
PWB
Slide Chassis
(L1)x1
ø3x8mm
(J2) x1
Clamp Lever
Turntable
CD Player Unit
(Top View)
(E2)x1
(E3)x1
(E2)x1
(E1)x7
ø3x10mm
Figure 10-1
Main PWB
(E2)x2
(F1)x3
ø3x8mm
Cam Gear Rib
Headphones
PWB
(E4)x1
(E1)x1
ø3x10mm
(J1) x2
1
Disc Tray
CD Player Unit
Figure 10-4
(K1) x3
2
(K1) x3
(G1)x9
ø3x10mm
(H1)x5
ø3x10mm
Tape
Mechanism
Figure 10-2
(G2)x1
Figure 10-3
Figure 10-5
Display PWB
Open
Cassette
Holder
Figure 10-6
– 10 –
Cam Gear
CD-BA1200H
CD
Mechanism
(M1) x1
Figure 11-1
CP-BA1200H
STEP REMOVAL
1 Speaker 1. Net ..........................(A1) x1 11-2
2. Duct Panel .............. (A2) x1
3. Screw......................(A3) x4 11-3
(M2) x3
(M1) x1
PROCEDURE
Loading
Motor
PWB
(N1) x5
FIGURE
CP-BA1200H
(A1)x1
(A2)x1
Driver
Speaker Box
Speaker Box
Speaker
(A3)x4
ø3.5x13mm
Driver should be
pried away from
Speaker Box.
Direction of handle
Figure 11-2
Figure 11-3
– 11 –
CD-BA1200H
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. Carefully remove the record/playback head and erase head
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.
Erase Head
(A1)x2
Ø2 x 9mm
Figure 12-1
TAPE 2
TAPE 1
Playback
Head
Record/Playback
Head
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.
Motor
TAPE 2
(B1)x1
Ø2x9mm
Pinch Roller
(C1)x1
FF/REW
Belt
(D2)x1
Figure 12-2
Pull
Figure 12-3
(B1)x1
Ø2x5mm
<B>
Motor
Pull
TAPE2
Main Belt
(D1)x1
<A>
Pinch
Roller
Pawl
Motor
TAPE1
Main Belt
(E1)x1
(F1) x2
Ø 2.6 x 5mm
– 12 –
(D1)x1
(E1)x1
Figure 12-4Figure 12-5
TAPE 1
FF/REW
Belt
(E2)x1
CD MECHANISM SECTION
TAPE MECHANISM
Motor
Variable Resistor
in motor
Perform steps 1, 2, 3, 9 and 12 of the disassembly method to
remove the CD mechanism.
CD-BA1200H
How to remove the loading motor
(See Fig. 13-1)
1. Bend the hooks (A1) x 5 pcs., to remove the loading motor.
How to remove the pickup (See Fig. 13-2)
1. Remove the screws (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.
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.
(B1) x2
ø2.6 x6mm
Loading Motor
(A1)x1
(A1)x2
(A1)x2
Slide Chassis
Figure 13-1
Stop Washer
(B3) x1
ADJUSTMENT
MECHANISM SECTION
• Driving Force Check
Torque Meter
Play: TW-2111 Tape 1: Over 80 g
• Torque Check
Torque Meter
Tape 1
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 2: Over 80 g
Specified Value
Tape 2
Pickup
Shaft
(B2) x1
Gear
CD Mechanism
(B4) x1
Figure 13-2
• Tape Speed
Test Tape
Normal MTT-111 Variable 3,000 ± Speaker
speed Resistor in 30 Hz terminal
Adjusting
Point
motor. (Load
Specified
Value
Instrument
Connection
resistance:
6 ohms)
Figure 13-3
– 13 –
CD-BA1200H
TUNER SECTION
fL: Low-range frequency
fH: High-range frequency
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
Test Stage 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
*1. Input: Antenna Output: TP302
*2. Input: Antenna Output: TP301
Frequency
Display
Setting/
Adjusting
Parts
TP301
R381
Instrument
Connection
SO301
FM ANTENNA
TERMINAL
1
FE301
T351
• 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
CNP302
AM LOOP
ANTENNA
T303
T306
MAIN PWB
AM
TRACKING fL
AM BAND
COVERAGE fL
AM IF
Figure 14-1 ADJUSTMENT POINTS
CD SECTION
• Adjustment
Since this CD system incorporates the following automatic
adjustment functions, readjustment is not needed when
replacing the pickup. Therefore, different PWBs and pickups
can be combined freely.
Each time a disc is changed, these adjustments are
performed automatically. Therefore, playback of each disc
can be performed under optimum conditions.
Items adjusted automatically
(1) Offset adjustment (The offset voltage between the head
amplifier output and the VREF reference voltage is
compensated inside the IC.)
* Focus offset adjustment
* Tracking offset adjustment
(2) Tracking balance adjustment (waveform drawing Fig.
14-2 EFBL)
(3) Gain adjustment (The gain is compensated inside the IC
so that the loop gain at the gain crossover frequency will
be 0dB.)
* Focus gain adjustment
* Tracking gain adjustment
R357
TP302
CD ERROR CODE DESCRIPTION
Error State Code
0001 Cannot detect Pickup-in SW
0002 DSP access error
0101 Open/Close SW Low → High not functioning
0103 Open/Close SW High → Low not functioning
0201 Open/Close SW Low → High not functioning
0203 Open/Close SW High → Low not functioning
0302 Pickup-in SW is not detected
0306 During Disc 1 search, Open/Close SW or Clamp SW
0307 Clamp SW Low → High not functioning
0308 Clamp SW High → Low not functioning
[Servo System Error]
[Error during close operation]
[Error during open operation]
[Error during skip operation]
or Disc SW do not change to low.
T
Stopped
CH1=500mV
CH2=200mV
DC 10:1
CH3=1V
DC 10:1
DC 10:1
T
FDO
1
TE
3
1999/04/05 20:26:47
500ms/div
(500ms/div)
NORM:20kS/s
– 14 –
EFBL
2
Smoothing : ON CH1 : 0.000V
BW : FULL
CH2 : 0.000V
CH3 : 0.00V
CH4 : 0.00V
Figure 14-2
=Record Length=
Main : 100K
Zoom : 2k
CH2
v/DIV
200mV
=Trigger==Filter= =Offset=
Mode : SINGLE
Type : EDGE CH1
Delay : 0.0ns
Hold off : 0.2us
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
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.
CD-BA1200H
• The indicated voltage in each section is the one measured
by Digital Multimeter between such a section and the chassis 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.
REF. NO DESCRIPTION POSITION POSITION
SW1 OPEN/CLOSE ON—OFF
SW2 CLAMP ON—OFF
SW3 DISC NUMBER ON—OFF
SW4 PICKUP IN ON—OFF
SW701 ON/STAND-BY ON—OFF
SW702 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
REF. NO DESCRIPTION
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
FRONT
VIEW
FRONT
FRONT
VIEW
VIEW
E C B
(S) (G) (D)
(1) (2) (3)
BCE
2SC1845 F
2SC3331
2SC380 O
KTA1266 GR
KTA1271 Y
KTA1273 Y
KTC3203 Y
KRC102 M
KRC104 M
KRC107 M
KTC2026
4204SRT7
Figure 15 TYPES OF TRANSISTOR AND LED
– 15 –
CD-BA1200H
1
3
5
4
3
1
1
2
4
IC2 24
IC2 23
IC2 24
IC2 72
IC1 18 ,
IC2 16
IC1 27
IC1 18 ,
IC2 16
IC2 72
IC2 24
Stopped
CH1=500mV
DC 10:1
T
FDO
1
TDO
3
Smoothing : ON CH1 : 0.000V
BW : FULL
1
T
2
3
Smoothing : ON CH1 : 0.000V
BW : FULL
2
T
1
Smoothing : ON CH1 : 0.0V
BW : FULL
T
2
CH2 : 0.0V
CH3 : 0.000V
CH4 : 0.00V
Stopped
CH1=500mV
DC 10:1
FDO
DRF
TE
CH Position To
-3div -1div 0div +1div +3div
CH2 : 0.0V
CH3 : 0.00V
CH4 : 0.00V
Stopped
CH1=10V
DC 10:1
TE
DRF
=Filter= =Offset=
CH2 : 0.00V
CH3 : 0.00V
CH4 : 0.00V
Stopped
CH1=200mV
DC 10:1
FDO
CH2=10V
DC 10:1
T
CH2=1V
DC 10:1
T
CH2=500mV
DC 10:1
CH3=500mV
DC 10:1
=Record Length=
Main : 100K
Zoom : 2K
CH3=1V
DC 10:1
=Record Length=
Main : 100K
Zoom : 2K
=Record Length=
Main : 100K
Zoom : 2K
WAVEFORMS OF CD CIRCUIT
500ms/div
(500ms/div)
NORM:20kS/s
IC2 1
7
IC2 2
8
IC2 24
10
11
12
9
1
4
13
1
IC2 37
IC2 57
IC2 58
IC2 59
IC2 24
IC1 18 ,
IC2 16
IC1 13 ,
IC2 22
CH1
v/DIV
500mV
=Trigger==Filter= =Offset=
Mode : AUTO
Type : EDGE CH1
Delay : 0.0ns
Hold off : 0.2us
500ms/div
(500ms/div)
NORM:20kS/s
CH2
Position
0.20div
=Trigger==Filter= =Offset=
Mode : AUTO
Type : EDGE CH1
Delay : 0.0ns
Hold off : 0.2us
Vp-p=1.0V~1.3V
0.5mV/div,0.5µsec/div
100ms/div
(100ms/div)
NORM:100kS/s
=Trigger=
Mode : NORMAL
Type : EDGE CH1
Delay : 2.924ms
Hold off : 0.2us
1999/04/07 09:51:15
500ms/div
(500ms/div)
NORM:20kS/s
Stopped
PDO1
3
4
PDO2
T
FDO
1
Smoothing : ON CH1 : 0.000V
BW : FULL
Stopped
T
1
DOUT
Smoothing : ON CH1 : 0.00V
BW : FULL
Stopped
1
LRSY
2
DATACK
T
3
DATA
Smoothing : ON CH1 : 0.00V
BW : FULL
Stopped
T
FDO
1
TE
3
EFBL
2
Smoothing : ON CH1 : 0.000V
BW : FULL
CH1=500mV
DC 10:1
CH1=2V
DC 10:1
CH1=2V
DC 10:1
CH1=500mV
DC 10:1
CH2 : 0.0V
CH3 : 0.00V
CH4 : 0.00V
T
CH2 : 0.00V
CH3 : 0.00V
CH4 : 0.00V
T
CH2=2V
DC 10:1
CH2 : 0.00V
CH3 : 0.00V
CH4 : 0.00V
T
CH2=200mV
DC 10:1
CH2 : 0.000V
CH3 : 0.00V
CH4 : 0.00V
CH3=1V
DC 10:1
=Record Length=
Main : 100K
Zoom : 2K
=Record Length=
Main : 1K
Zoom : 100
CH3=2V
DC 10:1
=Record Length=
Main : 5K
Zoom : 100
CH3=1V
DC 10:1
=Record Length=
Main : 100K
Zoom : 2k
1999/04/05 17:33:17
CH4=1V
500ms/div
(500ms/div)
DC 10:1
NORM:20kS/s
=Trigger==Filter= =Offset=
Mode : AUTO
Type : EDGE CH2
Delay : 0.0ns
Hold off : 0.2us
1999/04/07 09:25:28
500ns/div
(500ns/div)
NORM:200MS/s
=Trigger==Filter= =Offset=
Mode : NORMAL
Type : EDGE CH1
Delay : 2.887ms
Hold off : 0.2us
1999/04/05 20:50:17
NORM:100kS/s
=Trigger==Filter= =Offset=
Mode : AUTO
Type : EDGE CH3
Delay : 0.0ns
Hold off : 0.2us
1999/04/05 20:26:47
500ms/div
(500ms/div)
NORM:20kS/s
=Trigger==Filter= =Offset=
Mode : SINGLE
Type : EDGE CH1
Delay : 0.0ns
Hold off : 0.2us
5us/div
(5us/div)
CH1
v/DIV
500mV
CH3
v/DIV
2 V
CH2
v/DIV
200mV
SPDO
IC2 25
6
1
=Filter= =Offset=
Smoothing : ON CH1 : 0.000V
BW : FULL
CH2 : 0.000V
CH3 : 0.00V
CH4 : 0.00V
=Record Length=
Main : 100K
Zoom : 2K
=Trigger=
Mode : NORMAL
Type : EDGE CH2
Delay : 2.924ms
Hold off : 0.2us
– 16 –
TO MAIN SECTION
(TO IC601)
TO DISPLAY SECTION
SW1
OPEN/
CLOSE
12
CD-BA1200H
SW2
SW3
CLAMP
DISC
NUMBER
M
+
5
3
4
-
6
M3
T/T
UP/DOWN
MOTOR
BI4
XL1
16.9344MHz
R-CH
L-CH
AGND
DGND
2
1
3
4
75
76
65
CE
CL
66
DI
67
DO
68
INT
69
WRQ
70
RES
71
72
DEF
XOUT
52
XIN
51
VDD5V
CONT6
VVDD
CONT7
ADAVDD
VDD
47 48 32 31
45 46
LVSS
RVSS
LCHO
IC2
LC78641E
SERVO/SIGNAL
CONTROL
LVDD
RVDD
XVDD
RCHO
HFL
735183644 49 50 7 14 15 16
+5V(+B4)
5
Q2
RFENV
CNP11
CONT4
FE
CDINT
217
WRQ
DRF
CE
DO
DI
CD RES
CLK
5
43
89
6
30
74
CONT2
CONT3
64
40
19
13
3
CONT5
33
SLDO
26
25
SPDO
24
FDO
TDO
23
TE
CLAMP SW
GND
10
CNP12
12
12
56
3
4
3
4
56
CNS4
CNP4
CONSTANT
VOLTAGR
+3.3V
PICKUP UNIT
+5V
+3.3V
1
2 1725 4142 3839
22
18 19 20
Q1
17
HFL
30
IC1
LA9235M
23
SERVO AMP.
11
9
TIN2
TIN1
FIN2
FIN1
12
34
+5V
21
FE
TE
7
FE-
TE-
PD
LDD
RFEV
LASER
DRIVER
Q3
+3.3V
8
M1
SPINDLE
MOTOR
FOCUS COIL
TRACKING COIL
M2
SLED
MOTOR
VCC1
18
VCC4
+5V
40
24
23
28
VCC2
VCC3
FOCUS/TRACKING/
SPIN/SLED DRIVER
45671516 26 27
M
M
IC3
M63001FP
35
29
22
21
14
8
SW4
PICKUP IN
Figure 17 BLOCK DIAGRAM (1/3)
– 17 –
CD-BA1200H
Q
FM
ANTENNA
TAPE
MOTOR
SOLENOID
T2 PLAY
T1 PLAY
R.PLAY
F.PLAY
TAPE1
PBHEAD
TAPE2
RECPBHEAD
AM LOOP
ANTANNA
L341
BALUN
MOTOR
DRIVER
Q706
M
Q704
Q705
IC701
54PIN
IC701
53PIN
IC701
56PIN
IC701
55PIN
FROMCDSECTION
CNP11
L-CH
R-CH
REC
P.B.
L-CH
R-CH
ACBIAS
ERASE
HEAD
8
AM TRACKING
T303
+2B
+2B
SWITCHING
Q104~
Q107
TA7358AP
FM FRONT END
2
6
CNS601
1
2
3
4
5
POP
REDUCE
Q108
Q109
SWITCHING
Q114
L104
BIAS
OSC
FE301
3
7
FMOSC
T306
PLAYBACKANDRECORD
1
L(T1)
R(T1)
24
L(T2)
2
R(T2)
23
LNF
3
RNF
22
6
LREC
9
RREC
16
14
REF
12
1
5
4
AM BAND
COVERAGE
IC101
AN7345K
/PLAYBACKAMP.
P.B
T1/T2
REC
NOR/
15
12
SWITCHING
Q103
Q101
SWITCHING
CF301
H/N
T1/T2HIGH
19
Q102
FM +B
+B3
13
L
4
R
21
5
20
RECRL
7
18
LNF
8
RNF
17
ALC
10
Q112
L103
SWITCHING
Q301
VT
SWITCHING
Q360
+B3
PB
BIAS
Q113
20
FM
CF302
1
AM IF
21
AM
MIX
IC303
LA1832S
FM IF DET./FM MPX./AM IF
AMRFIN
FMAFC
15
16
IC302
LC72131
PLL(TUNER)
FM/AM
7
L
TAPE
R
TUNER
L
242122
9
23
X352
4.5MHZ
OSC
AMOSCIN
22
R
L
CD
R
CF352T351
4
5
GND
FM/AM
CE
3
OUT
18
9
CL
DI
4
5
2
1
AM IF
7
STEREO
11
MO/ST
10
9
16
10
15
1
14
IC601
LC75341
AUDIOPROCESSOR
12
13
17
8
7
CF351
8
FMFM+B
DET
16
DO
6
18
VCO
17
+B3
23
3
X351
456kHz
17
MO/ST
FM/AMMPXIN
12
MUTING
13
L
R
Q110
Q111
CE
CL
+B3
14
15
1
DI
2
24
R
21
4
Q601
Q602
L
SYSTEM
MUTE
REC/PLAY
T1/T2
BAIS
Figure 18 BLOCK DIAGRAM (2/3)
– 18 –
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