Sharp CD-BK250W User manual

– 1 –
CD-BK250W/CD-BK2600W/CD-BK270W
No. S5136CDBK250W
CONTENTS Page
SAFETY PRECAUTION FOR SERVICE MANUAL ........................................................................................................... 2
VOLTAGE SELECTION..................................................................................................................................................... 2
AC POWER SUPPLY CORD AND AC PLUG ADAPTOR ................................................................................................. 2
SPECIFICATIONS ............................................................................................................................................................. 3
NAMES OF PARTS ........................................................................................................................................................... 4
OPERATION MANUAL ...................................................................................................................................................... 7
DISASSEMBLY.................................................................................................................................................................. 9
REMOVING AND REINSTALLING THE MAIN PARTS................................................................................................... 12
ADJUSTMENT ................................................................................................................................................................. 13
BLOCK DIAGRAM ........................................................................................................................................................... 17
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD..............................................................................................20
VOLTAGE ........................................................................................................................................................................ 38
NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 39
TYPES OF TRANSISTOR AND LED............................................................................................................................... 39
WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 40
TROUBLESHOOTING..................................................................................................................................................... 41
FUNCTION TABLE OF IC................................................................................................................................................ 45
FL DISPLAY..................................................................................................................................................................... 53
REPLACEMENT PARTS LIST/EXPLODED VIEW
• 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.
SHARP CORPORATION
MINI COMPONENT SYSTEM
MODEL CD-BK250W
CD-BK250W Mini Component System consisting of
CD-BK250W (main unit) and CP-BK250 (speaker system).
MINI COMPONENT SYSTEM
MODEL CD-BK2600W
CD-BK2600W Mini Component System consisting of
CD-BK2600W (main unit) and CP-BK2600 (speaker system).
MINI COMPONENT SYSTEM
MODEL CD-BK270W
CD-BK270W Mini Component System consisting of
CD-BK270W (main unit), CP-BK270 (front speakers) and
GBOXS0070AWM1 (surround speakers).
Illustration: CD-BK250W/CD-BK2600W
Illustration: CD-BK270W
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CD-BK250W/CD-BK2600W/CD-BK270W
– 2 –
QACCE0010AW00
SAFETY PRECAUTION FOR SERVICE MANUAL
WARNINGS
THE AEL (ACCESSIBLE EMISSION LEVEL) OF THE LASER POWER OUTPUT IS LESS THAN CLASS 1 BUT THE LASER
COMPONENT IS CAPABLE OF EMITTING RADIATION EXCEEDING THE LIMIT FOR CLASS 1. THEREFORE IT IS
IMPORTANTTHATTHEFOLLOWINGPRECAUTIONSAREOBSERVEDDURINGSERVICINGTOPROTECTYOUREYES
AGAINST EXPOSURE TO THE LASER BEAM.
1-WHENTHECABINETISREMOVED,THEPOWERISTURNEDONWITHOUTACOMPACTDISCINPOSITIONANDTHE
PICKUP IS ON THE OUTER EDGE 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 UNIT AND REPLACEMENT SERVICE PARTS ARE ALL FACTORY
PRESET BEFORE SHIPMENT.
DO NOT ATTEMPT TO READJUST THE LASER PICKUP UNIT DURING REPLACEMENT OR SERVICING.
3-UNDER NO CIRCUMSTANCES STARE INTO THE PICKUP LENS AT ANY TIME.
4-CAUTION-USE OF CONTROLS OR ADJUSTMENTS, OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE
SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.
VOLTAGE SELECTION
Before operating the unit on mains, check the preset voltage. If the voltage is different from your local voltage, adjust the voltage
as follows.
Turnthe selector with a screwdriveruntil theappropriate voltage number appears inthe window(110 V, 127 V, 220V or230 V-240V AC).
AC POWER SUPPLY CORD AND AC PLUG ADAPTOR
QACCA0003AW00 QACCL0005AW00
QACCJ0007AW00
QPLGA0003AWZZ QPLGA0004AWZZ
Laser Diode Properties
Material: GaAIAs
Wavelength: 780 nm
Emission Duration: continuous
Laser Output: max. 0.6 mW
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.
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– 3 –
CD-BK250W/CD-BK2600W/CD-BK270W
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
CP-BK250/CP-BK2600
CD-BK250W/CD-BK2600W CD-BK270W
CP-BK270
GBOXS0070AWM1
General
Amplifier
CD player
Tuner
Cassette deck
Power source AC 110/127/220/230 - 240 V, 50/60 Hz
Power consumption 130 W
Dimensions Width: 270 mm (10-11/16")
Height: 330 mm (13")
Depth: 340 mm (13-3/8")
Weight 7.2 kg (15.7 lbs.)
Output power MPO: 240 W (120 W + 120 W) (10 % T.H.D.)
RMS: 150 W (75 W + 75 W) (10 % T.H.D.)
RMS: 104 W (52 W + 52 W) (0.9 % T.H.D.)
Output terminals Speakers: 6 ohms
Headphones: 16 - 50 ohms (recommended: 32 ohms)
Input terminals Video/Auxiliary (audio signal): 500 mV/47 kohms
Microphone: 1 mV/600 ohms
Type 3-disc multi-play compact disc player
Signal readout Non-contact, 3-beam semiconductor laser pickup
D/A converter 1-bit D/A converter
Frequency response 20 - 20,000 Hz
Dynamic range 90 dB (1 kHz)
Frequency range FM: 88 - 108 MHz
AM: 531 - 1,602 kHz
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)
Type 2-way type speaker system
5 cm (2") Tweeter
13 cm (5-1/4") Woofer
Maximum input power 150 W
Rated input power 75 W
Impedance 6 ohms
Dimensions Width: 220 mm (8-11/16")
Height: 330 mm (13")
Depth: 217 mm (8-9/16")
Weight 3.0 kg (6.6 lbs.)/each
General
Amplifier
CD player
Tuner
Cassette deck
Power source AC 110/127/220/230 - 240 V, 50/60 Hz
Power consumption 130 W
Dimensions Width: 270 mm (10-11/16")
Height: 330 mm (13")
Depth: 340 mm (13-3/8")
Weight 7.4 kg (16.1 lbs.)
Output power Front speakers:
MPO: 160 W (80 W + 80 W) (10 % T.H.D.)
RMS: 100 W (50 W + 50 W) (10 % T.H.D.)
RMS: 70 W (35 W + 35 W) (0.9 % T.H.D.)
Surround speakers:
MPO: 80 W (40 W + 40 W) (10 % T.H.D.)
RMS: 50 W (25 W + 25 W) (10 % T.H.D.)
RMS: 34 W (17 W + 17 W) (0.9 % T.H.D.)
Output terminals Front speakers: 8 ohms
Surround speakers: 16 ohms
Headphones: 16 - 50 ohms (recommended: 32 ohms)
Input terminals Video/Auxiliary (audio signal): 500 mV/47 kohms
Microphone: 1 mV/600 ohms
Type 3-disc multi-play compact disc player
Signal readout Non-contact, 3-beam semiconductor laser pickup
D/A converter 1-bit D/A converter
Frequency response 20 - 20,000 Hz
Dynamic range 90 dB (1 kHz)
Frequency range FM: 88 - 108 MHz
AM: 531 - 1,602 kHz
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)
Type 2-way type speaker system
5 cm (2") Tweeter
13 cm (5-1/4") Woofer
Maximum input power 100 W
Rated input power 50 W
Impedance 8 ohms
Dimensions Width: 220 mm (8-11/16")
Height: 330 mm (13")
Depth: 217 mm (8-9/16")
Weight 3.0 kg (6.6 lbs.)/each
Type 10 cm (4") full-range speaker
Maximum input power 50 W
Rated input power 25 W
Impedance 16 ohms
Dimensions Width: 200 mm (7-7/8")
Height: 93 mm (3-11/16")
Depth: 170 mm (6-3/4")
Weight 0.5 kg (1.1 lbs.)/each
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CD-BK250W/CD-BK2600W/CD-BK270W
– 4 –
NAMES OF PARTS
CD-BK250W/CD-BK2600W/CD-BK270W
Front panel
1. Disc Tray
2. Timer Set Indicator
3. On/Stand-by Button
4. Tape 2 Cassette Compartment
5. Tape 1 Cassette Compartment
6. Equalizer Mode Select Button
7. Volume Up and Down Buttons
8. Extra Bass/Demo Mode Button
9. Disc Tray Open/Close Button
10. Disc Skip Button
11. Tuning and Time Up Button
12. Tape 2 Reverse Play Button
13. CD Button
14. Tuner (Band) Button
15. Tape (1 2) Button
16. Video/Auxiliary Button
17. Dimmer Button
18. Clock Button
19. Timer/Sleep Button
20. Headphone Socket
21. CD or Tape Stop Button
22. CD Play, Tape 1 Play or Tape 2 Forward Play Button
23. Tape 2 Reverse Mode Select Button
24. CD Track Up or Fast Forward, Tape 2 Fast Wind,
Tuner Preset Up Button
25. Tuning and Time Down Button
26. Memory/Set Button
27. Tape 2 Record Pause Button
28. CD Track Down or Fast Reverse, Tape 2 Fast Wind,
Tuner Preset Down Button
29. Microphone Level Control
30. Microphone Socket
17 22
21
161514131211
25 26 27 29 3028
23
24
18
19
20
4
5
6
1
2
3
89
10
7
Display
1. Extra Bass Indicator
2. FM Stereo Mode Indicator
3. FM Stereo Receiving Indicator
4. Karaoke Mode Indicator
5. CD Repeat Play Indicator
6. CD Pause Indicator
7. CD Play Indicator
8. Tape 2 Record Indicator
9. Tape Reverse Mode Indicator
10. Disc Number Indicators
11. Timer Play Indicator
12. Memory Indicator
13. Tape 2 Reverse Play Indicator
14. Tape 1 Play or Tape 2 Forward Play Indicator
15. Sleep Indicator
16. Timer Recording Indicator
17. Spectrum Analyser/Volume Level Indicator
1
2
34 5 6
8
9
17
17 17
13 14 15 16
7
10
11
12
CD-BK250W/CD-BK2600W/CD-BK270W
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– 5 –
CD-BK250W/CD-BK2600W/CD-BK270W
CD-BK250W/CD-BK2600W
CD-BK270W
Rear panel
1. FM 75 Ohms Aerial Terminal
2. FM Aerial Earth Terminal
3. AM Loop Aerial Socket
4. Span Selector Switch
5. Video/Auxiliary (Audio Signal) Input Sockets
6. Speaker Terminals
7. AC Power Lead
8. AC Voltage Selector
2
1
5
6
7
4
3
8
1. Surround Speaker Terminals
2. FM 75 Ohms Aerial Terminal
3. FM Aerial Earth Terminal
4. AM Loop Aerial Socket
5. Span Selector Switch
6. Video/Auxiliary (Audio Signal) Input Sockets
7. Front Speaker Terminals
8. AC Power Lead
9. AC Voltage Selector
2
1
5
6
7
8
4
3
9
Speaker system
1. Tweeter
2. Woofer
3. Bass Reflex Duct
4. Speaker Wire
3
4
1
2
3
CP-BK250/CP-BK2600
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CD-BK250W/CD-BK2600W/CD-BK270W
– 6 –
Front speaker
1. Tweeter
2. Woofer
3. Bass Reflex Duct
4. Speaker Wire
Surround speaker (CD-BK270W Only)
1. Full-Range Speaker
2. Speaker Wire
3
4
1
2
3
1
2
Remote control
1. Remote Control Transmitter
2. Echo Level Up and Down Buttons
3. Karaoke Mode Button
4. Disc Number Select Buttons
5. CD Clear Button
6. Tape 2 Record Pause Button
7. CD Track Down or Fast Reverse, Tape 2 Fast Wind,
Tuner Preset Down Button
8. Equalizer Mode Select Button
9. Tape 2 Reverse Play Button
10. CD Button
11. Tuner (Band) Button
12. On/Stand-by Button
13. Extra Bass Button
14. CD Random Button
15. CD Memory Button
16. CD Pause Button
17. CD Track Up or Fast Forward, Tape 2 Fast Wind,
Tuner Preset Up Button
18. CD or Tape Stop Button
19. CD Play or Repeat, Tape 1 Play,
Tape 2 Forward Play Button
20. Video/Auxiliary Button
21. Tape (1 2) Button
22. Volume Up and Down Buttons
1
2
15
16
17
18
19
20
22
3
6
4
7
8
9
10
13
12
11
5
14
21
Buttons with " " mark in the illustration can be operated on the remote control
only.
Other buttons can be operated both on the main unit and the remote control.
GBOXS0070AWM1
CP-BK270
CD-BK250W/CD-BK2600W/CD-BK270W
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– 7 –
CD-BK250W/CD-BK2600W/CD-BK270W
OPERATION MANUAL
Setting the Clock
In this example, the clock is set for the 24-hour (0:00) display.
Note:
The "CLOCK" or time will flash at the push of the CLOCK button when the AC power
supply is restored after a power failure or unplugging the unit.
Readjust the clock as follows.
To readjust the clock:
Perform "Setting the Clock" from the beginning. If the time display is flashing, step 3
(for selecting the 24-hour or 12-hour display) will be skipped.
To change the 24-hour or 12-hour display:
1
Press the ON/STAND-BY button to turn the power on.
2
Press the CLOCK button and within 5 seconds, press the MEMO-
RY/SET button.
3
Press the TUNING/TIME ( or ) button to select 24-hour or 12-
hour display and then press the MEMORY/SET button.
"0:00" The 24-hour display will appear.
(0:00 - 23:59)
"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)
Note that this can only be set when the unit is first installed or it has been reset.
[Refer to "Clearing all the memory (reset)".]
4
Press the TUNING/TIME ( or ) button to adjust the hour andthen
press the MEMORY/SET button.
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 automatically to "PM".
5
Press the TUNING/TIME ( or ) button to adjust the minutes and
then press the MEMORY/SET button.
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 will not advance even if minutes advance from "59" to "00".
The clock begins counting from "0" seconds. (Seconds are not displayed.)
The time display will disappear after a few seconds.
To confirm the time display:
Press the CLOCK button.
The time display will appear for about 5 seconds.
1 Clear all the programmed contents. [Refer to "Clearing all the memory (reset)".]
2 Perform "Setting the Clock" from the beginning.
System Connections
Setting the AC voltage selector
Check the setting of the AC voltage selector located on the rear panel before plug-
ging the unit into an AC socket. If necessary, adjust the selector to correspond to the
AC power voltage used in your area.
Turn the selector with a screwdriver until the appropriate voltage num-
ber appears in the window (110 V, 127 V, 220 V or 230 V - 240 V AC).
Connecting the AC power lead
After making all connections, plug the unit. If you plug the unit first,
the unit will enter the demonstration mode.
Note:
Unplug the AC power lead from the AC socket if the unit will not be in use for a pro-
longed period of time.
AC Plug Adaptor
In areas (or countries) where an AC socket as shown in illustration is used, con-
nect the unit using the AC plug adaptor supplied with the unit, as illustrated. The AC
plug adaptor is not included in areas where the AC wall socket and AC power plug
can be directly connected (see illustration ).
1
2
Setting the FM/AM span selector
The International Telecommunication Union (ITU) has established that member coun-
tries should maintain either a 100 kHz or a 50 kHz interval between broadcasting fre-
quencies of FM stations and 10 kHz or 9 kHz for AM station. The illustration shows
the 50/9 kHz zones (regions 1 and 3), and the 100/10 kHz zone (region 2).
Before using the unit, set the SPAN SELECTOR switch (on the rear panel) to the
interval (span) of your area.
To change the tuning zone:
Caution:
This operation will erase all data stored in memory including clock, timer settings,
tuner preset, and CD programme.
1 Press the ON/STAND-BY button to enter the stand-by mode.
2 Set the SPAN SELECTOR switch (on the rear panel) as follows.
For 50 kHz FM interval (9 kHz in AM) 50/9
For 100 kHz FM interval (10 kHz in AM) 100/10
3 Whilst pressing down the button and the X-BASS/DEMO button, press the ON/
STAND-BY button until "CLEAR AL" appears.
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CD-BK250W/CD-BK2600W/CD-BK270W
– 8 –
Troubleshooting Chart
Many potential "problems" can be resolved by the owner without calling a service
technician.
If something is wrong with this product, check the following before calling your autho-
rised SHARP dealer or service centre.
General
CD player
Tuner
Cassette deck
Karaoke
Remote control
Symptom Possible cause
The clock is not on time. Did a power failure occur? Reset the
clock.
When a button is pressed, the unit
does not respond. Set this unit to the power stand-by mode and then turn it back on.
If the unit still malfunctions, reset it.
No sound is heard. Is the volume level set to "0"?
Are the headphones connected?
Are the speaker wires disconnected?
Isthekaraokemodeset to"L-CH", "R-CH"
or "V-CANCEL"?
Symptom Possible cause
Playback does not start. Is the disc loaded upside down?
Playback stops in the middle or is
not performed properly. Does the disc satisfy the standards?
Is the disc distorted or scratched?
Playback sounds are skipped, or
stopped in the middle of a track. Is the unit located near excessive vibra- tions?
Is the disc very dirty?
Has condensation formed inside the unit?
Symptom Possible cause
Radio makes unusual noise con-
secutively. Is the unit placed near the TV or comput- er?
Is the FM aerial or AM loop aerial placed
properly? Move the AC power lead away
from the aerial if located near.
Symptom Possible cause
Cannot record. Is the erase-prevention tab removed?
Cannot record tracks with proper
sound quality. Is it a normal tape? (You cannot record on a metal or CrO tape.)
Cannot erase completely.
Sound skipping. Is there any slack?
Is the tape stretched?
Cannot hear treble. Are the capstans, pinch rollers, or heads
dirty?
Sound fluctuation.
Cannot remove the tape. If a power failure occurs during playback,
the heads remain engaged with the tape.
Do not open the compartment forcibly.
Wait until electricity resumes.
Symptom Possible cause
The vocal part of a multiplexed
disc is not heard. Isthekaraokemodeset to"L-CH", "R-CH" or "V-CANCEL"?
Symptom Possible cause
The remote control does not oper-
ate. Is the AC power lead of the unit plugged in?
Is the battery polarity respected?
Are the batteries dead?
Is the distance or angle incorrect?
Does the remote control sensor receive
strong light?
Troubleshooting Chart
If trouble occurs
When 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 incorrectly, it may malfunction.
If such a problem occurs, do the following:
1 Set the unit to the stand-by mode and turn the power on again.
2 If the unit is not restored in the previous operation, unplug and plug in the unit,
and then turn the power on.
Note:
If neither operation above restores the unit, clear all the memory by resetting it.
Clearing all the memory (reset)
1 Press the ON/STAND-BY button to enter the power stand-by mode.
2 Whilst pressing down the button and the X-BASS/DEMO button, press the ON/
STAND-BY button until "CLEAR AL" appears.
Caution:
This operation will erase all data stored in memory including clock, timer settings,
tuner preset, and CD programme.
Before transporting the unit
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.
Remove all CDs inserted in the unit.
4 Press the OPEN/CLOSE button to close the disc tray.
Make sure that "NO DISC" is displayed.
5 Pressthe ON/STAND-BYbutton toenter the stand-bymode,and thenunplug
the AC power lead from the AC socket.
Remote Control
Notes concerning use:
Replace the batteries if the operating distance is reduced or if the operation
becomes erratic. Purchase 2 "AA" size batteries (UM/SUM-3, R6, HP-7 or similar).
Periodically clean the transmitter on the remote control and the sensor on the unit
with a soft cloth.
Exposing the sensor on the unit to strong light may interfere with operation.
Change the lighting or the direction of the unit.
Keep the remote control awa
y
from moisture, heat, shock, and vibrations.
Test of the remote control
Face the remote control directly to the remote sensor on the unit.
The remote control can be used within the range shown below:
Press the ON/STAND-BY button. Does the power turn on? Now, you can enjoy the
music.
0.2 m - 6 m
(8" - 20')
Remote sensor
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– 9 –
CD-BK250W/CD-BK2600W/CD-BK270W
1 Top Cabinet 1. Screw ...................... (A1) x4 9-1
2 Side Panel 1. Screw ...................... (B1) x8 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 tray cover, and close.
(Note 1)
2. Screw ...................... (C1) x1
3. Hook........................ (C2) x3
4. Hook........................ (C3) x2
5. Socket ..................... (C4) x2
4 Rear Panel with 1. Screw .................... (D1) x11 9-2
Fan Motor (For CD-BK250W/CD-BK2600W)
1. Screw .................... (D1) x14
(For CD-BK270W)
2. Socket ..................... (D2) x1
(For CD-BK250W/CD-BK2600W)
2. Socket ..................... (D2) x2
(For CD-BK270W)
5 Main PWB 1. Screw ...................... (E1) x3 9-2,10-3
2. Socket ..................... (E2) x4 10-3
3. Flat Cable ............... (E3) x1
4. Flat Wire.................. (E4) x1
6 Front Panel 1. Screw .......................(F1) x2 10-3
7 Display PWB 1. Knob........................ (G1) x1 10-4
2. Screw .................... (G2) x12
3. Flat Cable ............... (G3) x1
8 Tape Mechanism 1. Open the cassette holder. .. 10-4
2. Screw...................... (H1) x5
9 Headphones PWB 1. Screw ....................... (J1) x1 10-4
10 Mic PWB 1. Screw ...................... (K1) x2 10-4
2. Tip ........................... (K2) x1
(CD-BK270W Only)
11 Turntable 1. Hook.........................(L1) x2 10-5
2. Cover .......................(L2) x1
12 Disc Tray 1. Turn fully the lock lever in the 10-1
arrow direction .
2. While holding the lock lever,rotate 10-2
the cam gear until the cam gear
rib engages with the clamp lever.
3. Push the slide chassis backward 10-6
to engage the claw with the
groove and remove it in the
direction of the arrow .. (M1) x6
13 CD Servo PWB 1. Screw ...................... (N1) x1 11-1
(Note 2) 2. Hook........................ (N2) x2
3. Socket ..................... (N3) x4
14 CD Mechanism 1. Hook........................ (P1) x2 11-2
2. Hook........................ (P2) x3
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.Take offnylon bandsor wireholders wherethey needto
beremovedwhendisassemblingtheunit.Afterservicing
theunit, besure torearrange the leads where they were
before disassembling.
4. Take sufficient care on static electricity of integrated
circuits and other circuits when servicing.
Figure 9-2
CD-BK250W/CD-BK2600W/CD-BK270W
STEP REMOVAL PROCEDURE FIGURE
Figure 9-1
CD-BK250W/CD-BK2600W/CD-BK270W
Note 1: How to open the changer manually. (Fig. 10-1)
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. 10-2)
3. After that, push forward the slide chassis.
Note 2:
1. After removing the connector for the optical pickup from the
connector,wraptheconductivealuminiumfoilaroundthefrontend
of the connector so as to protect the optical pickup from electro-
static damage.
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.
Illustration: CD-BK270W
(B1)x4
ø3x10mm (B1)x2
ø3x10mm
Rear
Panel
(B1)x2
ø3x10mm
Side Panel
(Right)
Side Panel
(Left)
(A1)x2
ø3x12mm
(A1)x2
ø3x12mm Top Cabinet
Pull
Pull
(C3)x1
(C4)x2
CD Servo
PWB CD Tray Cover
(C2)x3
1
1
2
(C3)x1
CD Player
Unit
(E1)x1
ø3x10mm
Lug Wire
(D1)x2
ø3x10mm
Main PWB
(C1)x1
ø3x10mm
(D1)x9
ø3x10mm
(D1)x3
ø3x10mm
Rear
Panel
(D2)x1
(D2)x1
CD-BK270W
ONLY
CD-BK270W
ONLY
All manuals and user guides at all-guides.com

CD-BK250W/CD-BK2600W/CD-BK270W
– 10 –
Figure 10-1
Figure 10-2
Figure 10-3
Figure 10-4
Figure 10-5
Figure 10-6
Lock Lever
CD Player Unit
(Bottom View)
Clamp Lever
CD Player Unit
(Top View)
Cam Gear Rib
Transformer
PWB
(E3)x1
Power PWB (E2)x1
(E1)x2
ø3x10mm
(E2)x1 (E2)x1
(E2)x1 Headphones
PWB
(E4)x1
Mic PWB
Front
Panel
(F1)x2
ø3x8mm
Main PWB
(G3)x1
(G1)x1
(K2)x1
Mic PWB
(K1)x2
ø3x10mm
Open
Cassette
Holder
Lug Wire
Lug Wire
Headphones
PWB
(J1)x1
ø3x10mm
(H1)x5
ø3x10mm
Tape
Mechanism
(G2)x12
ø3x10mm
Display
PWB
CD-BK270W
ONLY
Front
Panel
Turntable
Slide
Chassis
(L2)x1
CD Player Unit
(L1)x2
3
(M1)x3
(M1)x3
1
2
All manuals and user guides at all-guides.com

– 11 –
CD-BK250W/CD-BK2600W/CD-BK270W
1 Front Panel 1. Net.......................... (A1) x1 11-3
2 Woofer 1. Screw ..................... (B1) x4 11-4
3 Tweeter 1. Screw ..................... (C1) x2 11-4
STEP REMOVAL PROCEDURE FIGURE
Figure 11-3
Figure 11-1
CP-BK250/CP-BK2600/CP-BK270
Figure 11-4
(A1)x1
Screwdriver
Driver should
be pried away
from Speaker Box.
Front Panel
Speaker Box
(B1)x4
ø4x12mm
Woofer
(C1)x2
ø3x10mm
Tweeter
Figure 11-2
(N3)x2
(N2)x2
(N3)x2
CD Servo
PWB Slide
Chassis
(N1)x1
ø3x8mm
(P2)x3
(P1)x1 (P1)x1
CD
Mechanism
Slide
Chassis
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CD-BK250W/CD-BK2600W/CD-BK270W
– 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. When you remove the screws (A1) x 2 pcs., the recording/
playback head and three-dimensional head of the erasing
head can be removed.
How to remove the playback head (TAPE 1)
(See Fig. 12-2)
1. When you remove the screws (B1) x 2 pcs., the playback
head.
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) x 1 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
(A1)x2
Ø2x6mm
TAPE 2
Record/Playback
Head
Erase Head
Clutch Ass'y
(B1)x1
Ø2x9mm (B1)x1
Ø2x5mm
TAPE 1
Playback
Head
Clutch Ass'y
Pinch Roller
(C1)x1 <A>
Pull
<B>
Pull
Pinch
Roller
Pawl
TAPE 2 TAPE 1
Main Belt
(E1)x1
TAPE 2
Main Belt
(D1)x1
TAPE 1
FF/REW
Belt
(D2)x1
FF/REW
Belt
(E2)x1
Motor
Motor
Main Belt
(D1)x1
Main Belt
(E1)x1
(F1)x2
Ø2.6x5mm
Motor
Clutch Ass'y
All manuals and user guides at all-guides.com

– 13 –
CD-BK250W/CD-BK2600W/CD-BK270W
How to remove the pickup (See Fig. 13-2)
1. Remove the stop washer (B1) x 1 pc., to remove the gear
(B2) x 1 pc.
2. Remove the screws (B3) x 2 pcs., to remove the shaft
(B4) x 1 pc.
3. Remove the pickup.
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.
Figure 13-2
CD MECHANISM SECTION
Perform steps 1, 2, 3, 11,12, 13 and 14 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.
2. Remove the drive belt (A2) x 1pc.
Figure 13-1
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 ±30 Hz Speaker
speed Resistor in Terminal
motor. (Load
resistance:
6 ohms)
•Tape Speed
Figure 13-3
(A1)x2
(A1)x1
Loading MotorLoading
Motor PWB
Slide
Chassis
(A1)x2
Pulley
Drive Belt
(A2)x1
Loading
Motor
(B3)x2
ø2.6x6mm
Shaft
(B4)x1
Stop Washer
(B1)x1
Gear
(B2)x1
CD Mechanism
Pickup
TAPE MECHANISM
Tape
Motor
Variable Resistor in motor
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CD-BK250W/CD-BK2600W/CD-BK270W
– 14 – 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 not functioning (Low →High)
0103 Open/Close SW not functioning (High →Low)
[Error during open operation]
0201 Open/Close SW not functioning (Low →High)
0203 Open/Close SW not functioning (High →Low)
[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 not function (Low →High)
0308 Clamp SW not function (High →Low)
T
T
EFBL
FDO
TE
Stopped
CH1=500 mV
DC 10:1 CH2=200 mV DC 10:1 CH3=1 V DC 10:1 500 ms/div
(500 ms/div)
NORM:20 kS/s
1
2
3
=Record Length=
Smoothing : ON CH1 : 0.000 V
CH2 : 0.000 V Main : 100K Zoom : 2k Mode : SINGLE Type : EDGE CH1
Delay : 0.0 ns
Hold off : 0.2 µs
CH3 : 0.00 V
CH4 : 0.00 V
BW : FULL
=Trigger==Filter= =Offset=
CH2
v/DIV
200 mV
1999/04/05 20:26:47
Test Stage Frequency Frequency
Display Setting/
Adjusting
Parts
Instrument
Connection
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 1,602 kHz T351 *1
AM Band — 531 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, 40 kHz dev., FM modulated
FM Band — 87.50 MHz T301(fL): *1
Coverage 1.3 V ±0.1 V
FM RF 98.00 MHz 98.00 MHz L312 *2
(10-30 dB)
Test Stage Instrument
Connection
Frequency Frequency
Display Setting/
Adjusting
Point
Figure 14-1 ADJUSTMENT POINTS
Items adjusted automatically
(1)Offset adjustment (Theoffset voltage betweenthe 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 gainiscompensatedinsidetheIC
sothat theloop gainat the gain crossover frequency will
be 0 dB.)
* Focus gain adjustment
* Tracking gain adjustment
•Adjustment
Since this CD system incorporates the following automatic
adjustment functions, readjustment is not needed when
replacingthe pickup.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.
IC301
AM IF
FM IF FM RF
T303
T306
T302 L312
AM
TRACKING fL
AM BAND
COVERAGE fL
T301
T351
FM BAND
COVERAGE fL
MAIN PWB
CNP301
AM LOOP
ANTENNA
SO302
FM ANTENNA
TERMINAL
TP302
R357
R316
TP301
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– 15 –
CD-BK250W/CD-BK2600W/CD-BK270W
TEST MODE
•Setting the test mode
Any one of test mode can be set by pressing several keys as follows.
<X-BASS> + <CD> + <POWER> TEST:CD operation test
Function: -CD test mode.
-Enter test mode.
C D T E S T
OPEN/CLOSE operation is using manual.
<< >>,<< >>buttonsmakepick'sslidepossible.
Do TOC IL. Do normal play
When these following key is input
into PLAY key, track number can
be appoint directly
<<PLAY>> key input. <<MEMORY>> key input.
<< 1>> key: Track 4
<< 2>> key: Track 9
<< 3>> key: Track 15
<<STOP>> key input.
STOP
Laser ON.
<<MEMORY>> key input.
Tracking OFF play at that
specific point.
<<MEMORY>> key input.
Tracking ON play from
that specific point.
<<STOP>> key input.
STOP
IL isn't done
VOL — Last memory
BAL — CENTER
P.GEQ — FLAT
X-BASS — OFF
To cancel : Power OFF
Sliding the PICKUP with
<< >>, << >> button
must only be in STOP mode.
<<MEMORY>>
key input
Adjustment result
automatically will
display as below
for each 2 sec :
a) "FOFF_XX"
b) "TOFF_XX"
c) "TBAL_XX"
d) "TGAN_XX"
f) "FGAN_XX"
g) "RFLS_XX"
explanation:
a) Focus off set = "FOFF_XX"
b) Tracking off set = "TOFF_XX"
c) Tracking balance = "TBAL_XX"
d) Tracking gain = "TGAN_XX"
f) Focus Gain = "FGAN_XX"
g) RF level shift = "RFLS_XX"
Adjustment result auto-
matically will display as
below
for each 2 sec :
a) "FOFF_XX"
b) "TOFF_XX"
c) "TBAL_XX"
d) "TGAN_XX"
f) "FGAN_XX"
g) "RFLS_XX"
XX: Hex value
All manuals and user guides at all-guides.com

CD-BK250W/CD-BK2600W/CD-BK270W
– 16 –
Standard Specification of Stereo System Error Message Display Contents
Error Contents DISPLAY Notes
Output while Device Protection Operation 'PROTECT' 00: While in Protect Circuit Operate
01: Over Current Detection
02: DC Detection
03:
TAPE Mechanism Error 'ER-TA**' 00: Tape Mechanism Error
01: Initial Error
02:
03:
CD/VCD Pickup Mechanism Error 'ER-CD**' 00: Pickup Mechanism Error
01: PU-IN SW Detection NG
02:
03:
04:
CD Changer Mechanism Error 'ER-CD**' 10: Changer Error
11: Initial Error
12:
13:
Tray Error 'ET-CD**' 20: Tray Error
21:
22:
23:
Focus Not Match 'NO DISC'
IL Time Over 'NOT READ'
TUN PLL Unlock 'ER-TU**' 00: TUN Error
01: PLL Unlock
02:
03:
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– 17 –
CD-BK250W/CD-BK2600W/CD-BK270W
Figure 17 BLOCK DIAGRAM (1/3)
+5V
CNS4 BI4
CNP4
M3
T/T UP DOWN
LOADING
+3.3V
TO DISPLAY SECTION
TO MAIN SECTION
CONSTANT
VOLTAGE
Q2
LASER
DRIVER
+3.3V
+3.3V
Q1
+5V
PICK UP UNIT
IC1
LC78645E
CD SERVO
VVDD LDD LDS
M
SW3
DISC
NUMBER
SW2
CLAMP
SW1
OPEN/
CLOSE
CNP8
CNP7
TRACKING COIL
FOCUS COIL
SW4
PICKUP
IN
M2
SLED
MOTOR
M1
SPINDLE
MOTOR M
M
R-CH
Q3
XVDD RVDD LVDD ADAVDD RFVDD
XL1
33.8688MHz
OC. DISC NO CLAMP SW CD RES CLK DI DO CE DRF WRQ
+5(+B5) +5(+B5)
DGND L-CH
AGND
VCC3
VCC2
VCC4
VCC1 IC2
M63001FP
FOCUS/TRACKING/
SPIN/SLED
DRIVER
XIN
XOUT
RES
WRQ
DO
DI
CLK
CE
TIN2 TIN1 FIN2 FIN1
TD0
FD0
SPDO
SLDO
CONT5
CONT2 CONT3 CONT4
RCHO
RVSS
LVSS
LCHO
80
42
79
75
20
540
18
24
23 14
8
21
22
29
35
41
47 46
710
987
15
12
17 25 42
41 8339
4765 16
82
26 27
316452
316452
316452
54
71
61
62
63
69
57
56
55
51
50
40
37
19
28
26
23
22
21
3271689
615432
4543 44 25 70
64
65
66
48
49
18
All manuals and user guides at all-guides.com

CD-BK250W/CD-BK2600W/CD-BK270W
– 18 –
Figure 18 BLOCK DIAGRAM (2/3)
AM
ANTENNA
SO302
FM
ANTENNA
CNP301
JK1
MIC
1
2
IC101
AN7345K
PLAYBACK AND RECORD
/PLAYBACK AMP.
AUX
R
L
R
L
JK690
VIDEO/AUX IN
FM
+B +B4
CLK
+B
4
AM IF
OSC BUFF
FM IF
FM
OSC
B.P.F
CNS601 ATT
–20 dB
Q103-
Q104
–B2
+B4
IC561,IC
5
KIA455
8
OPE A
M
IC562
IC561
Q107
Q108
Q601
Q602
10.7 MHz
450kHz
RE
C
CLK
CE
DI
DO DI CE
MO/ST
SWITCHING
+B4
FM/AM
IC302
LC72131
PLL(TUNER)
FM/AM OUT
L
R
MUTING
P.B.
REC
AC BIAS
LLR
L
R
R
R
L
TAPE
TUNER
CD
PB
CNP7
FROM CD SECTION
HEAD
ERASE
SWITCHING
SWITCHING
SWITCHING
BIAS
Q113
Q114
Q112
Q110
SWITCHING
Q109
OSC
BIAS Q111
L103
Q105
Q106
REC PB HEAD
TAPE 2
P.B. HEAD
TAPE 1
R-CH
L-CH
R-CH
L-CH
IC601
LC75341
AUDIO PROCESSOR
+B4
R
L
REC
R
L
L NF
R NF
ALC
REF
R REC
L REC
POP REDUCE
R NF
L NF
SWITCHING
L(T2)
R(T2)
R(T1)
L(T1)
R
L
FM/AM
MPXIN
STEREO
AM RF IN
AM OSC IN
FM
Q360
VT
OSC
X352
4.5 MHZ
AM BAND
COVERAGE
AM TRACKING
T303 T306
Q302
X351
456 kHz
MO/ST
VCO
FM
DET
FM+B
GND
AM IF
CF351
IC303
LA1832S
FM IF DET.
FM MPX./
AM IF MPX.
AM MIX
CF352
T351
RF
FM
OSC
FM
L312 T301
CF303T302
IC301
TA7358AP
FM FRONT END
BF301
21
7
8
41
22
3
4
24
2
1
18 178
3
9
10
18
11
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
14
12
15
1
5413
8
4
3
2
1
21
7
98517
6
21
21
20 22 11
17
1615
9
6
57
13
14
12
15
1623
4
7
H/N
P.B
REC
T1/T2
T1/T2
NOR/
HIGH
L
R
ICK1
M65856SP
MIC AMP.
ICK2
KIA4558P
OPE AMP.
LATCH
MIC IN
VRK1
MIC
VOLUME
CLK
DATA
LOUT
ROUT
L IN
R IN
VCC
+B5
+B4
98
7
5
6
2
3
1
12
13
22 23
QK1
32
31
35
36
42
41
40
All manuals and user guides at all-guides.com

– 19 –
CD-BK250W/CD-BK2600W/CD-BK270W
Figure 19 BLOCK DIAGRAM (3/3)
SW601
SPAN
SELECTOR
CD-BK270W ONLY
Q914
KTC2026
KIA7810AP
VOLTAGE REGULATOR
Q907
Q908
–VF
VF2
VF1
Q901
+B5
+5V
SW5V
KIA7805AP
CONSTANT VOLTAGE REGULATOR
IC904
+B4
+B3
+B1
-B1
–B2
+B5
+B3
+B5
-
13 44
+B4
–
16
–
Q701-Q703
R
L
ATT
–20 dB
+B5
RX701
REMOTE
SENSOR
–
B2
+B4
IC561,IC562
KIA4558P
OPE AMP.
IC701
IX0427AW
(2/2)
IC562
IC561
1
07
1
08
D902~D905
D901
RL914
JK701
HEADPHONES
M901
FAN
MOTOR
M
Q906
Q709
Q902
Q903
Q905
Q904
Q601
Q602
IC903
IC902
IC901
STK4029S
POWER AMP.
A+10V
M12
F903
T2A L 250V
F904
T2A L 250V
F902
T4A L 250V
F901
T4A L 250V
+Vcc
– Vcc
R-OUT
L-OUT
CLK
SO901
SPEAKER
TERMINAL
SR1
SURROUND
SPEAKER
TERMINAL
31
REC/PLAY
C
LK
CE
DI
VLOAD
RESET
+B5
+B5
+B5
+B5
VDD VDD VDD
SP. DET.
–
CE DI DO
4
XL700
4.194304 MHz
–
L
R
BIAS
T1/T2
T
ING
AVDD
SW701-SW703
SW712-SW732
KEY
TO CD
SECTION
IC701
IX0427AW(1/2)
SYSTEM
MICROCOMPUTER
FL701
FL DISPLAY
O
R
R
L
X
351
6
kHz
21
23
89
81
32
80
4948
47
93
14
92
90
1245678
15
1
29
28
9
78
67
6132
3
2
1
7
8
41
13
7
8
10
100
4
24
2
1
33
31
4546
111213
9
10 16 17 20 2123 15 2224
79
5761 56 545352515055 4948 4344 42 4039
36
35
34
3
14
15
T.F.
PT801
POWER
TRANSFORMER
110 V
127 V
220 V
230-240 V
SW801
VOLTAGE
SELECTOR
AC POWER
SUPPLY CORD
AC 110/127/220/
230-240 V, 50/60 Hz
RESET
CD-BK250W/CD-BK2600W: 6 ohms
CD-BK270W: 8 ohms
All manuals and user guides at all-guides.com

CD-BK250W/CD-BK2600W/CD-BK270W
– 20 –
Figure 20 SCHEMATIC DIAGRAM (1/11)
A
B
C
D
E
F
G
H
123456
• NOTES ON SCHEMATIC DIAGRAM can be found on page 39.
R620
22K
9 10 11
1415161718192021222324
8
7
6
5
4
321
9
10
11
12 13
14
15
16
17
18
19
20
21
22
23
24
8
7
6
5
4
3
2
1
–15V
VF1
VF2
–VP
UN_SW_5V
P_IN
M_+12V
A+10V
GND
GND
L-CH
R-CH
SW_5V
GND
GND
GND
REC
_
SP_RLY
SP_DET
(A_+B) SW_5V
CD_+B SW_5V
A_+B
A_GND
L
L
R
R
P22 1 - F, G
TO POWER SECTION
P29 12 - D
TO CD SERVO PWB
CNP7
CD_+B
CD_GND
L-CH
A_GND
R-CH
T1_R
T1_L
A_GND
M_GND
ERASE
T2_R2
T2_R1
T2_L1
T2_L2
4
2
ERASE HEAD
TAPE 2
RECORD/
PLAYBACK HEAD
TAPE 1
PLAYBACK HEAD
R-CHL-CH
R-CH
L-CH
3
2
1
1
3
5
6
3
2
1
6
5
4
3
2
1
6
5
4
3
2
1
1
2
3
4
5
6
7
1
2
3
4
5
6
CD
TUNER
DECK
AUX
DI
CE
VSS
LOUT
LBASS
LTRE
LIN
L4
L3
L2
L1
CLK
VDD
VREF
ROUT
RBASS
RTRE
RIN
RSEL0
R4
R3
R2
R1
CCB
INTERFACE
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
LSEL0
ALC
ALC
RIPPLE
NOR/CRO2
–
–
+– +
Hich=T1
+– +
Hich=CHROME
56K
112K
56K
112K
213
2
13
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
17
18
19
20
21
MAIN PWB-A1(1/3)
+B
+B
+B
+B
+B
+B
+B +B
+B
+B
+B
-B
-B -B
Q112~Q114: SWITCHING
Q101~Q106: SWITCHING
MU
T
MUTING
BI601
CNS601
CNP101
BI102
CNS102
Q104
2SC1845 F
C104
180P
R106
3.3K
R104
2.2K
Q102
2SC1845 F
R108
47K R110
4.7K
Q106
KTC3199 GR
C106
560P
R112 15K
R116
56
C112
100/25
C114
0.033
R122
33K
C116
560P C118
47/25
R124
5.6K
R120
3.9K
R118
100K
C120
0.0022
R126
3.9K
C121
0.022
C122
3.3/50 R128
6.8K
C124
270P
R132
100
C126
22/50
C132
47/25
C130
0.0033
C128
0.022
R130
1.5K
R134
10K
C108
330P
R114
1K C110
330P
C107
330P
R113
1K C109
330P
IC101
AN7345K
PLAYBACK AND RECORD/
PLAYBACK AMP.
C103
180P
Q103
2SC1845 F
R105
3.3K
R103
2.2K
Q101
2SC1845 F
C102
560P
C101
560P
C136
0.022
Q112
KTA1266 GR
R146
10K R148
4.7K
R147
10K
Q113
KRC104 M
C141
100/16
C150
10/50
R149
150
C639
1/50
R621
22K
R618
330
R619
330
R604
10K C610
1/50
C608
0.1
R606
3.9K
C612
0.0027
C606
0.15
C614
1/50
C616
4.7/50 C618
1/50
C620
1/50
C624
1/50
C622
1/50
R608
1.2K
C626
0.0056
R602
1K
R601
1K
IC601
LC75341
AUDIO PROCESSOR
C623
1/50
C
6
1/
5
C6
1/
5
C6
1/
5
C
6
4.7
/
C
6
1/
5
C60
5
0.15
C
0
C6
0
22/
5
Q
1
KTC3
1
R138
10K
R137
220K
R139
10K
C119
0.0022
R121
33K
R125
68K
R127
3.9K
R117
100K
C113
0.033
C111
100/25
R115
56
C115
560P
R119
3.9K
C117
47/25
R123
5.6K
C123
270P
R129
6.8K
C125
22/50
C127
0.022
R131
1.5KR133
100
C129
0.0033
C131
47/25 R135
10K
C133
22/50
C134
220/10
C601
220/16
R614
3.3K
R615
3.3K
R613
390
R611
2.2K
C635
0.001
C636
0.001
R610
2.2K
R612
390
Q602
KTC3199 GR
Q601
KTC3199 GR
Q114
KRC104 M
R111
15K
R101
1K
R102
1K
R107
47K
C105
560P
Q105
KTC3199 GR
R109
4.7K
Q107
KTC3199 GR
R617
2.2K
R616
2.2K
C637
0.001
C638
0.001
Q604
KTC3199 GR
Q603
KTC3199 GR
C640
22/50
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