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– 1 –
CD-K477W
No.S8869CDK477W/
CONTENTS Page
SAFETY PRECAUTION FOR SERVICE MANUAL ........................................................................................................... 2
VOLTAGE SELECTION......................................................................................................................................................2
SPECIFICATIONS ............................................................................................................................................................. 3
NAMES OF PARTS ........................................................................................................................................................... 4
OPERATION MANUAL ...................................................................................................................................................... 8
DISASSEMBLY................................................................................................................................................................ 10
REMOVING AND REINSTALLING THE MAIN PARTS................................................................................................... 13
ADJUSTMENT ................................................................................................................................................................. 14
NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 18
TYPES OF TRANSISTOR AND LED................................................................................................................................18
BLOCK DIAGRAM ........................................................................................................................................................... 19
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD............................................................................................. 22
WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 49
TROUBLESHOOTING ..................................................................................................................................................... 50
FUNCTION TABLE OF IC................................................................................................................................................ 54
FL DISPLAY..................................................................................................................................................................... 61
REPLACEMENT PARTS LIST/EXPLODED VIEW
CD-K477W
• 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
Manufactured under license from Dolby Laboratories Licens-
ing Corporation.
DOLBY, the double-D symbol and "PRO LOGIC" are
trademarks of Dolby Laboratories Licensing Corporation.
CP-K477, CP-SW477, CENTER(GBOXS0015AWM2)
and Surround (GBOXS0016AWM2) speaker system
Constibute CD-K477W
CD-K477W
– 2 –
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
IMPORTANT THAT THE FOLLOWING PRECAUTIONS ARE OBSERVED DURING SERVICING TO PROTECT YOUR EYES
AGAINST EXPOSURE TO THE LASER BEAM.
1-WHEN THE CABINET IS REMOVED, THE POWER IS TURNED ON WITDOUT A COMPACT DISC IN POSITION AND THE
PICK-UP IS ON THE OUTER EDGE THE LASER WILL LIGHT FOR SEVERAL SECONDS TO DETECT A DISC. DO NOT
LOOK INTO THE PICK-UP LENS.
2-THE LASER POWER OUTPUT OF THE PICK-UP UNIT AND REPLACEMENT SERVICE PARTS ARE ALL FACTORY
PRE-SET BEFORE SHIPMENT.
DO NOT ATTEMPT TO RE-ADJUST THE LASER PICK-UP UNIT DURING REPLACEMENT OR SERVICING.
3-UNDER NO CIRCUMSTANCES STARE INTO THE PICK-UP 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.
CAUTION
●This Mini Component System is classified as a CLASS
1 LASER product.
●The CLASS 1 LASER PRODUCT label is located on the
rear cover.
●Use of controls, adjustments or performance of proce-
dures other than those specified herein may result in
hazardous radiation exposure.
As the laser beam used in this compact disc player is
harmful to the eyes, do not attempt to disassemble the
cabinet. Refer servicing to qualified personnel only.
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.
VARO ! Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle. Älä katso säteeseen.
VARNING! Osynlig laserstralning när denna del är öppnad och spärren är urkopplad. Betrakta ej strälen.
QACCA0001AW00
VOLTAGE SELECTION
The voltage selector is located on the AC voltage selector box. If adjustment is necessary, use a screwdriver in order to turn the
selector in either direction until the correct voltage figure is displayed in the window next to the adjustment screw.
Figure 2 AC POWER SUPPLY CORD AND AC PLUG ADAPTOR
QACCE0008AW00
QACCJ0003AW00
QACCL0005AW00
– 3 –
CD-K477W
● General
Power source: AC 110/127/220/230-240 V,
50/60 Hz
Power consumption: 190 W
Dimensions: Width; 270 mm (10-5/8")
Height; 316 mm (12-1/2")
Depth; 343 mm (13-1/2")
Weight: 10.2 kg (22.5 lbs.)
● Amplifier section
Output power: PMPO; 1600 W
(Front)
MPO; 182 W (91 W + 91 W)
(10 % T.H.D)
RMS; 100 W (50 W + 50 W)
(10 % T.H.D)
(Centre)
MPO; 49 W (10 % T.H.D)
RMS; 25 W (10 % T.H.D)
(Surround)
MPO; 49 W (total) (10 % T.H.D)
RMS; 25 W (total) (10 % T.H.D)
(Sub woower)
MPO; 91 W (10 % T.H.D)
RMS; 50 W (10 % T.H.D)
Output terminals: Front speakers; 8 ohms
Centre speaker; 8 ohms
Surround speakers; 16 ohms
Sub woofer; 8 ohms
Headphones; 16-50 ohms
(recommended; 32 ohms)
CD digital output (optical)
Input terminals: Video/Auxiliary (audio signal) ×
2; 500 mV/47 kohms
Microphone 1/2; 1 mV/4.7 kohms
● Tuner section
Frequency range: FM; 88 - 108 MHz
SW2; 9.5 - 21.85 MHz
SW1; 3.2 - 7.3 MHz
MW; 531 - 1,602 kHz
● Cassette deck section
Frequency response: 50-14,000 Hz (Normal tape)
Signal/noise ratio: 55 dB (TAPE 1, playback)
50 dB (TAPE 2, recording/
playback)
Wow and flutter: 0.15 % (WRMS)
● 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)
● Front speaker section
Type: 3-way type [130 mm (5-1/8")
woofer, 50 mm (2") tweeter and
super tweeter]
Maximum input
power: 100 W
Impedance: 8 ohms
Dimensions: Width; 190 mm (7-1/2")
Height; 316 mm (12-1/2")
Depth; 264 mm (10-7/16")
Weight: 3.0 kg (6.6 lbs.)/each
● Centre speaker section
Type: 100 mm (4") woofer
Maximum input
power: 50 W
Impedance: 8 ohms
Dimensions: Width; 262 mm (10-5/16")
Height; 145 mm (5-3/4")
Depth; 201 mm (7-15/16")
Weight: 1.4 kg (3.1 lbs.)
● Surround speaker section
Type: 100 mm (4") woofer
Maximum input
power: 25 W
Impedance: 16 ohms
Dimensions: Width; 170 mm (6-3/4")
Height; 123 mm (4-7/8")
Depth; 176 mm (6-15/16")
Weight: 0.7 kg (1.5 lbs.)/each
● Sub woofer section
Type: 160 mm (6-1/2") woofer
Maximum input
power: 100 W
Impedance: 8 ohms
Dimensions: Width; 220 mm (8-11/16")
Height; 316 mm (12-1/2")
Depth; 294 mm (11-5/8")
Weight: 3.8 kg (8.4 lbs.)
SPECIFICATIONS
CD-K477W
GBOXS0015AWM2
GBOXS00016AWM2
CP-SW477
CP-K477
CD-K477W
– 4 –
NAMES OF PARTS
CD-K477W
■ Front panel
11.
(CD) Disc Tray
12.
(CD) Disc Number Select Buttons
13.
(CD) Disc Skip Button
14.
(CD) Open/Close Button
15.
Dolby Pro Logic Indicator
16.
(CD) Disc Number Indicators
17.
(TAPE 2) Direction Indicators
18.
(TAPE 2) Reverse Mode Indicator
19.
(CD) Play Indicator
10.
(CD) Repeat Indicator
11.
(CD) Pause Indicator
12.
(TAPE 2) Record Indicator
13.
Timer Record Indicator
14.
Timer Play Indicator
15.
4-Speaker Indicator
16.
Sleep Indicator
17.
Extra Bass Indicator
18.
Random Play Indicator
19.
(CD/TUNER) Memory Indicator
20.
(TUNER) FM Stereo Indicator
21.
(TUNER) FM Stereo Mode Indicator
22.
Spectrum Analyzer
23.
Function Selector Buttons
24.
Surround Mode Selector Buttons
25.
Extra Bass Button
26.
Volume Control
27.
On/Stand-by Button
28.
Headphone Socket
29.
Karaoke Maker Switch
30.
Microphone Sockets
31.
Microphone Level Controls
32.
Digital Echo Control
33.
Equalizer Selector/Demo Mode Button
34.
Clock Button
35.
Sleep Button
36.
(TAPE 2) Reverse Mode Button
37.
(CD) Pause Button
38.
Jog Dial
39.
(CD/TAPE) Stop Button
40.
(TAPE) Record Pause Button
41.
Sub Woofer Level Control Buttons
42.
Timer Button
43.
Memory Button
44.
(CD) Clear Button
45.
(CD) Track Down/Review Button
3
(TAPE 2) Fast Wind Button
3
(TUNER) Tuning Down Button
46.
(TAPE 2) Reverse Play Button
47.
(CD) Play/Repeat Button
3
(TAPE 1) Play Button
3
(TAPE 2) Forward Play Button
48.
(CD) Track Up/Cue Button
3
(TAPE 2) Fast Wind Button
3
(TUNER) Tuning Up Button
49.
Editing Speed Selector Buttons
123 4
56 7 8
9 10 11 12
13 14 15 16 17
20 21 22
18
19
24
23 25 26
27 28 29 30 31 32 33
34 35 36 37 38 39 40 41
42 43 44 45 46 47 48 49
– 5 –
CD-K477W
11.
(TAPE 1) Cassette Compartment
12.
(TAPE 2) Cassette Compartment
■ Rear panel
11.
CD Digital Output Socket
12.
Video/Auxiliary (Audio Signal) Input Sockets
13.
Span Selector Switch
14.
FM 75 Ohms Aerial Terminal
15.
Aerial Earth Terminal
16.
SW1/SW2/MW Aerial Terminal
17.
AC Voltage Selector
18.
AC Power Lead
19.
Front Speaker Terminals
10.
Sub Woofer Terminals
11.
Surround Speaker Terminals
12.
Centre Speaker Terminals
12
FRONT
SPEAKERS SUB
WOOFER
RATED SPEAKER IMPEDANCE:
8 OHMS MIN.
RIGHT LEFT
SURROUND
SPEAKERS CENTER
SPEAKER
RIGHT
RATED SPEAKER
IMPEDANCE:
16 OHMS MIN.
RATED SPEAKER
IMPEDANCE:
8 OHMS MIN.
LEFT
1 2 3
4
5
6
7
8
9 10 11 12
CD-K477W
– 6 –
GBOXS0015AWM2
GBOXS0016AWM2
■ Front speaker
11. Super Tweeter
12. Tweeter
13. Woofer
14. Bass Reflex Ducts
15. Speaker Terminals
■ Sub woofer
11. Woofer
12. Bass Reflex Ducts
13. Speaker Terminals
■ Centre speaker
11. Woofer
12. Speaker Wire
■ Surround speaker
11. Woofer
12. Speaker Wire
1
2
3
4
5
1
23
1
2
1
2
CP-K477
CP-SW477
– 7 –
CD-K477W
■ Remote control
11.
Remote Control Transmitter LED
12.
Surround Mode Selector Buttons
13.
Test Tone Button
14.
Sub Woofer Level Control Buttons
15.
Centre Level Buttons
16.
Surround Level Buttons
● Tuner control section
17.
Preset Up/Down Buttons
● CD control section
18.
Track Up/Cue Button
19.
Track Down/Review Button
10.
Memory Button
11.
Disc Skip Button
12.
Stop Button
13.
Play/Repeat Button
14.
Pause Button
15.
Clear Button
16.
Random Button
● Tape control section
17.
(TAPE 2) Record Pause Button
18.
(TAPE 2) Reverse Play Button
19.
(TAPE 1/2) Stop Button
20.
(TAPE 1) Play Button
3
(TAPE 2) Forward Play Button
21.
(TAPE 2) Fast Wind Button
● Common section
22.
Extra Bass Button
23.
Equalizer Mode Button
24.
Function Selector Buttons
25.
Balance Control Buttons
26.
On/Stand-by Button
27.
Volume Up/Down Buttons
28.
Dimmer Button
1
2
3
4
5 6
7
8
9
10
11
12
13
14
15 16
17 18 19 20
22
23
24
25
26
21
27
28
CD-K477W
– 8 –
OPERATION MANUAL
SETTING THE CLOCK
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 button.
4
Turn the jog dial to select the time display mode.
"0:00" → The 24-hour display will appear.
(0:00 - 23:59)
"AM 12:00" → The 12-hour display will appear.
(AM or PM 12:00 - 11:59)
"AM 0:00" → The 12-hour display will appear.
(AM or PM 0:00 - 11:59)
●Note that this can only be set when the unit is first installed
or it has been reset (see page 34).
5
Press the MEMORY button.
6
Adjust the hour by turning the jog dial.
●When the jog dial is turned one click clockwise, the time will
increase by 1 hour. When it is turned one click anti-clockwise,
the time will decrease by 1 hour.
Keep turning the jog dial to change the time continuously.
●When the 12-hour display is selected, "AM" will change auto-
matically to "PM".
7
Press the MEMORY button.
8
Adjust the minutes by turning the jog dial.
●When the jog dial is turned one click clockwise, the time will
increase by 1 minute. When it is turned one click anti-clock-
wise, the time will decrease by 1 minute.
Keep turning the jog dial to change the time continuously.
●The hour setting will not advance even if minutes advance
from "59" to "00".
9
Press the MEMORY button.
●The clock starts operating from "0" seconds. (Seconds are not
displayed.)
Note:
●In the event of a power failure or when the AC power lead is
disconnected, the clock display will go out.
When the AC power supply is restored, the clock display will
flash on and off to indicate the time when the power failure
occurred or when the AC power lead was disconnected.
If this happens, follow the procedure below to change the clock
time.
To change the clock time:
When the unit is in the stand-by mode:
①
Press the MEMORY button.
②
Perform steps 6 - 9 above.
When the unit is on:
①
Press the CLOCK button.
②
Within 5 seconds, press the MEMORY button.
③
Perform steps 6 - 9 above.
To see the time display:
Press the CLOCK button.
●The time display will appear for about 5 seconds.
To change the time display mode:
①
Perform steps 1 - 2 in the section "RESETTING THE MICRO-
COMPUTER", on page 34.
②
Perform steps 1 - 9 above.
In this example, the clock is set for the 24-hour
(0:00) system.
Jog dial
ON/STAND-BY
CLOCK
MEMORY TUNING
( )
0:00 AM 12:00 AM 0:00
2
3
4
5
6
7
8
9
– 9 –
CD-K477W
(Continued)
■
FM/MW interval (span)
The International Telecommunication Union (ITU) has estab-
lished that member countries should maintain either a 10 kHz or
a 9 kHz interval between broadcasting frequencies of any MW
station. The illustration shows the 9 kHz interval zones (regions
1 and 3), and the 10 kHz interval zone (region 2).
Before using the unit, set the SPAN SELECTOR switch (on the
rear panel) to MW tuning interval (span) of your area.
To change the tuning zone:
1
Press the ON/STAND-BY button to enter the stand-by mode.
2
Set the SPAN SELECTOR switch to "50/9" for 9 kHz MW
interval (50 kHz FM interval), and "100/10" for 10 kHz MW
interval (100 kHz FM interval).
3
Press the ON/STAND-BY button whilst holding down the
button and the EQUALIZER/DEMO button.
Caution:
●The operation explained above will erase all data stored in
memory including clock and timer settings, and tuner and CD
presets.
FM/MW
(kHz)
50/9 100/10
SPAN
SELECTOR
(Continued)
■
Remote control
●When inserting or removing the batteries, push them towards
the battery terminal.
●Installing the batteries incorrectly may cause the unit to mal-
function.
Precautions for battery use:
●Insert the batteries according to the direction indicated in the
battery compartment.
●Replace all old batteries with new ones at the same time.
●Do not mix old and new batteries.
●Remove the batteries if they are weak or if the unit will not
be used for long periods of time. This will prevent potential
damage due to battery leakage.
Caution:
Do not use rechargeable batteries (nickel-cadmium battery, etc.).
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 control
and the sensor on the main unit with a soft cloth.
●Exposing the sensor on the main unit to strong light may in-
terfere with operation. Change the lighting or the direction of
the unit.
●Keep the remote control away from moisture, excessive heat,
shock, and vibrations.
+-
-
+
15
15
●2 "AA" size bat-
teries (UM/SUM-
3, R6, HP-7 or
similar)
0.2 m - 6 m
(8" - 20')
RESETTING THE MICROCOMPUTER
Reset the microcomputer under the following conditions:
●To erase all of the stored memory contents (clock and timer
settings, and tuner and CD presets).
●If the display is not correct.
●If the operation is not correct.
1Press the ON/STAND-BY button to enter the stand-by mode.
2Press the ON/STAND-BY button whilst holding down the
button and the EQUALIZER/DEMO button.
Caution:
●The operation explained above will erase all data stored in
memory including clock and timer settings, and tuner and CD
presets.
ON/STAND-BY
EQUALIZER
/DEMO
CD-K477W
– 10 –
1 Top Cabinet 1. Screw ..................... (A1) x4 10-1
2 Side Panel 1. Screw ..................... (B1) x8 10-1
(Left/right)
3 CD Player Unit/ 1. Turn on the power supply, 10-2
CD Tray Cover open the disc tray, take out
the CD cover, and close.
(Note 1)
2. Hook....................... (C1) x3
3. Hook....................... (C2) x2
4. Screw ..................... (C3) x1
5. Socket .................... (C4) x3
4 Rear Panel 2. Screw ..................... (D1) x14 10-2
5 Tuner PWB 1. Socket .................... (E1) x1 11-1
2. Screw ..................... (E2) x2
6 Main PWB 1. Flat cable ............... (F1) x2 11-1
2. Flat wire .................
(F2) x3
3. Socket...................... (F3) x4
4. Screw....................... (F4) x3
7
Karaoke PWB
1. Screw ..................... (G1) x3 11-2
8 Front Panel 1. Flat wire ................. (H1) x1 11-2
2. Screw...................... (H2) x2
9
Speaker Amp. PWB
1. Socket .................... (J1) x3 11-2
2. Screw ..................... (J2) x6
10
Power Supply PWB
1. Screw ..................... (K1) x6 11-3
11 Display PWB 1. Knob....................... (L1) x2 11-4
2. Nut.......................... (L2) x1
3. Screw ..................... (L3)x12
12 CD Switch PWB 1. Screw ..................... (M1) x3 11-4
13
Headphones PWB
1. Screw ..................... (N1) x1 11-4
14 Tape Mechanism 1. Screw ..................... (P1) x6 11-4
15 Turntable 1. Screw ..................... (Q1) x1 11-5
2. Cover ..................... (Q2) x1
16 Disc Tlay 1. Screw ..................... (R1) x2 11-5
2. Guide ..................... (R2) x2
17 CD Servo PWB 1. Screw ..................... (S1) x1 11-6
(Note 2) 2. Socket .................... (S2) x4
18 CD Changer 1. Screw ..................... (T1) x4 12-1
Mechanism
19 CD Mechanism 1. Screw ..................... (U1) x1 12-1
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. 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 suffcient care on static electricity of integrated
circuits and other circuits when servicing.
Figure 10-2
Figure 10-3
CD-K477W
STEP REMOVAL PROCEDURE FIGURE
Note 1:
How to open the changer manually. (Fig. 10-3)
1. Then, turn fully the lock lever in the arrow direction through
the hole on the loading chassis bottom in this state.
After that, push forward the CD player base.
After removing the connector for the optical pickup fromthe
connector wrap the conductive aluminium foil around the
front end of connector so as to protect the optical pickup
from electrostatic damage.
Figure 10-1
CD-K477W
LOCK
LEVER
CD Tray Cover
CD ServoPWB
CD Player
Unit
( D1 ) x10
ø3 x8mm ( C3 ) x1
ø3 x8mm
Hook
( C1) x3
( C2 ) x1
( C4 ) x2
( C4 ) x1
Rear Panel
Main PWB
Front Panel
1
1
2
Tuner PWB
Pull
(C2) x1
(D1) x1
ø3 x10mm
(D1) x1
ø3x10mm
(D2) x2
ø3 x10mm
( B1 ) x2
ø3 x8mm
( B1 ) x4
ø3 x8mm ( B1 ) x2
ø3 x8mm
Top Cabinet
Side Panel
(Right)
Rear Panel
Side Panel
(Left)
( A1 ) x2
ø3 x12mm
( A1 ) x2
ø3 x12mm
Note 2:
– 11 –
CD-K477W
Figure 11-1
Figure 11-2
Figure 11-3
Figure 11-4
Figure 11-5
Figure 11-6
(E2) x2
ø3 x10mm
(F4) x2
ø3x10mm
(F4) x1
ø3x10mm
(F3) x2
(F1) x2
(F2) x2
(F2) x1
(F3) x2
(E1) x1
Main PWB
Tuner PWB SPEAKER
AMP. PWB
Front Panel
(J2)x5
ø3x10mm
(G1)x1
ø3x10mm
(G1)x2
ø3x10mm
Front Panel
( J2 ) x1
ø3x10mm ( H2 ) x2
ø3x10mm
( J1 ) x2
( J1 ) x1
( H1 ) x1
Speaker Amp. PWB
Karaoke
PWB
(K1)x4
ø4x8mm
(K1)x1
ø3x8mm
(K1)x1
ø3x10mm
Power Supply PWB
(M1)x3
ø3x10mm
(L3)x12
ø3x10mm
(P1)x6
ø3x10mm
(N1)x1
ø3x10mm
Open
Headphones
PWB
Display
PWB
(L1)x2
(L2)x1
Washer
Tape Mechanism
Cassette
Holder (Left/Right)
Front Panel
CD Switch PWB
( R1 ) x1
ø3 x10mm
( R1 ) x1
ø3 x10mm
( Q1 ) x1
ø3 x10mm
Turntable
Disc Tray
( Q2 ) x1
( R2 ) x1
( R2 ) x1
CD Player Unit
( S1 ) x1
ø3 x10mm
( S2 ) x2
( S2 ) x2 CD Player Unit
CD Servo PWB
CD-K477W
– 12 –
CP-K477
1 Front Speaker 1. Net.......................... (A1) x1 12-2
2. Front Panel ............ (A2) x1
3. Screw ..................... (A3) x2
4. Screw ..................... (A4) x4
5. Screw ..................... (A5) x2
STEP REMOVAL PROCEDURE FIGURE
CP-K477
Figure 12-2
CP-SW477
Figure 12-3
CP-SW477
1 Sub woofer 1. Net.......................... (A1) x1 12-3
2. Duct Panel ............. (A2) x1
3. Screw ..................... (A3) x4
STEP REMOVAL PROCEDURE FIGURE
Note:
The center and rear speakers can be easily disassembled.
Therefore the disassembling method is not discribed.
For details refer to the disassembling drawing in the Parts
Guide.
Be careful when installing the CD changer mechanism.
Install the CD changer mechanism on the CD player base after
the shift lever has been set in the highest position.
Figure 12-1
( A3 ) x4
ø4 x16mm
Net
( A1 ) x1
( A2 ) x1 Screwdriver
Woofer
( T1 ) x4
ø3 x12mm
( U1 ) x1
ø2.6 x10mm
CD Changer
Mechanism
CD Mechanism
Shift Lever
CD Player Base
Screw driver
Woofer
Net
(A1)x1
Front Panel
(A2)x1
Tweeter
Woofer
Tweeter
Super
Tweeter (A5)x2
ø3x10mm
(A3)x2
ø3x10mm
(A4)x4
ø4x12mm
– 13 –
CD-K477W
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.
Figure 13-2
REMOVING AND REINSTALLING THE MAIN PARTS
CD MECHANISM SECTION
Perform steps 1, 2, 3,15,16,17 and 19 of the disassembly
method to remove the CD mechanism.
How to remove the loading motor
(See Fig. 13-1)
1. Remove the screws (A1) x 2 pcs., to remove the loading
motor.
Figure 13-1
( A1 ) x2
ø2.6 x5mm
Loading / Up
/ Down Motor
Motor
PWB
( B1 ) x2
ø2.6 x6mm
Shaft
( B2 ) x1
Stop Washer
( B3 ) x1
Gear
( B4 ) x1
CD Mechanism
Pickup
Note
After removing the connector for the optical pickup fromthe
connector wrap the conductive aluminium foil around the
front end of connector so as to protect the optical pickup
from electrostatic damage.
CD-K477W
– 14 –
MECHANISM SECTION
• Driving Force Check
Torque Meter Specified Value
Play: TW-2412 Tape 1: Over 80 g
Tape 2: Over 80 g
• Torque Check
Torque Meter
Tape 2
Play: TW-2111 30 to 60 g. cm 30 to 100 g.cm
Fast forward: TW-2231 — 50 to 100 g.cm
Rewind: TW-2231 — 50 to 100 g.cm
Specified
Value
Adjusting
Point Instrument
Connection
Test Tape
Normal MTT-111 VRM01 3,000 ± Speaker
speed 30 Hz terminal
(Load
resistance:
8 ohms)
ADJUSTMENT
Specified Value
Tape 1
• Tape Speed
Figure 14-1
VRM01
TAPE
SPEED
FAS
SW
SWM1
TAPE MECHANISM PWB
IF 450 kHz 1,602 kHz T351 *1
MW Band — 531 kHz (fL): T306 *2
Coverage 1.1 ± 0.1 V
SW1 Band — 3.2 MHz (fL): T307 *2
Coverage 2.0 ± 0.1V
SW1 Band — 7.3 MHz (fH): TC305 *2
Coverage 7.7 ± 0.2 V
SW2 Band — 9.5 MHz (fL): T308 *2
Coverage 2.1 ± 0.1V
SW2 Band — 21.85 MHz (fH): TC304 *2
Coverage 7.7 ± 0.2V
MW 990 kHz 990 kHz T302 *1
Tracking
SW1 3.9 MHz 3.9 MHz (fL): T303 *1
Tracking
SW1 7.1 MHz 7.1 MHz (fH): TC303 *1
Tracking
SW2 11.65 MHz 11.65 MHz (fL): T304 *1
Tracking
SW2 21.45 MHz 21.45 MHz (fH): TC302 *1
Tracking
TUNER SECTION
fL: Low-range frequency
fH: High-renge frequency
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
Test Stage Instrument
Connection
Frequency Frequency
Display Setting/
Adjusting
Parts
*1. Input: Antenna, Output: TP302
*2. Input: Anetnna, Output: TP301
– 15 –
CD-K477W
Figure 15 ADJUSTMENT POINTS
Instrument
Connection
• FM RF
Signal generator: 1 kHz, 40 kHz dev, FM modulated
Test Stage Frequency Frequency
Display Setting/
Adjusting
Parts
Band — 87.5 kHz (fL): LT02 *1
Coverage 3.7 ± 0.1 V
RF 98 MHz 98 MHz LT01 *2
10 - 30 dB
*1. Input: Antenna, Output: TP301
*2. Input: Anetnna, Output: Speaker Terminal
• Setting the Test Mode
Keeping the PAUSE button and TUNER button pressed, turn
on POWER. Then, the frequency is initially set in the memory
as shown in Table. Call it with the PRESET button to use it for
adjustment and check of tuner circuit.
Preset
No.
1 87.50 MHz 6 531 kHz 11 3.2 MHz 16 9.5 MHz
2 108.00 MHz 7 1,602 kHz 12 7.3 MHz 17 21.85MHz
3 90.00 MHz 8 603 kHz 13 3.9 MHz 18 11.65 MHz
4 106.00 MHz 9 1,404 kHz 14 7.1 MHz 19 21.45 MHz
5 98.00 MHz 10 990 kHz 15 5.06 MHz 20 15.1 MHz
21 ~ 40
FM Preset
No. MW SW2
Preset
No. SW1 Preset
No.
• FM Detection
Signal generator: 10.7 MHz, FM sweep
Test Stage Instrument
Connection
Frequency Frequency
Display Setting/
Adjusting
Parts
IF 10.7 MHz 98 MHz TT01 *1
(Turn the
core of trans-
former TT01
fully counter-
clock wise)
*1. Input: Antenna, Output: TP301
*2. Input: Anetnna, Output: Speaker Terminal
*1. Adjust so that an output signal appears.
• FM Mute Level
Signal generator: 1kHz, 40 kHz dev., FM modulated
Frequency Adjusting
Parts Instrument
Connection
Frequency
Display
98.00 MHz 98.00 MHz VR351 *1 Input: Antenna
(25 dBµV) Output: Speaker
Terminal
TUNER PWB
AM IF
T351 VR351
LT02 TT01
T303TC303
T304TC302
T302
T308 TC304
T307 TC305
T306
LT01
MW Band
Coverage
FM Mute
Level
FM Band
Coverage
MW
Tracking
IC303
SW2 Tracking
fH fL
TP302
SW1 Band
Coverage
fL fH
SW1
Tracking
fH fL
SW2
Coverage
fL fH
TP301
R357
FM IF FM RF
SO301
ANTENNA
TERMINAL
CD-K477W
– 16 –
TEST MODE
2
1
TO
TE
200 ms
1V/diV
IC 1 15
200 ms
1V/diV
IC 1 7
TRACKING/
ERROR
BARANCE
ADJUST
Figure 16-2 Figure 16-3
2
1
10ms
0.50 V
IC1 20 FE
10ms
0.50 V
IC1 7 TE
Enlarged
View
TRACKING
OFF-SET
ADJUST
Since this CD system incorporates the following automatic adjustment function, when the pickup is replaced, it is not necessary
to readjust it.
Since this CD unit does not need adjustment, the combination of PWB and laser pickup unit is not restricted.
• Automatic adjustment item
1. Focus offset (Fig. 16-2)
2. Tracking offset (Fig. 16-3)
3. E/F balance (tracking error balance) (Fig. 16-4)
4. RF level AGC function (HF level: constant)
5. RF level automatic follow-up of the tracking gain
This automatic adjustment is performed each time a disc is changed. Therefore,
each disc is played back using the optimal settings.
CD SECTION Figure 16-1
Note:
Only in STOP state it is possible to slide the pickup with the ( ) or ( ) key.
VOL. --- Last memory
BAL. --- CENTER
R.GEQ. --- FLAT
X-BAS --- OFF
Canceling method - POWER OFF
• Setting the test mode
Any one of test mode can be set by pressing several keys as follows.
<REC. PAUSE> + <DISC. SKIP> + <POWER> TEST: CD operation test
• TEST mode
Function — CD test mode
Setting of TEST mode
Indication of CD TST mode (Fig. 16-1)
OPEN/CLOSE operation is manual operation.
The pickup can be moved by using the ( ) or ( ) key.
<MEMORY>
LASER ON
<PLAY> key input Press <STOP> key. Stop
TOC. IL is performed, and the ordinary PLAY is performed.
If the following key is pressed during PLAY, it is possible
to specify directly any Track No.
<Disc Number 1> key: Track 4
<Disc Number 2> key: Track 9
<Disc Number 3> key: Track 15
<MEMORY>
Tracking on the spot.
SERVO OFF PLAY
<MEMORY>
Tracking on the spot.
SERVO ON PLAY STOP
2
0.1s
0.50 V
IC1 20 FE
0.1s
0.50 V
IC1 7 TE
1
FOCUS
OFF-SET
ADJUST
TRACKING
OFF-SET
ADJUST
Figure 16-4
IL is not performed.
<STOP>
– 17 –
CD-K477W
SP out L-ch Input signal is output.
(TMV01) R-ch Input signal is output.
(TMX11) SP out C-ch SP cut, no output
(TMX111) SP out S-ch
Almost no output (only omitting component)
SP out L-ch Almost no output (only omitting component)
(TMV01) R-ch Almost no output (only omitting component)
(TMX11) SP out C-ch
Input signal is output.
(TMX11) SP out S-ch
Almost no output (only omitting component)
State of set Dolby Pro Logic Dolby Pro Logic On mode
Output point Bypass mode Normal mode Phantom mode
ICC01 12 pin L-out Output enabled state Output enabled state Output enabled state
11 pin R-out Output enabled state Output enabled state Output enabled state
ICC01 9pin C-out No output Output enabled state No output
ICC01 10pin S-out No output Output enabled state Output enabled state
SP OUT L-ch Output enabled state Output enabled state Output enabled state
(TMV01) R-ch Output enabled state Output enabled state Output enabled state
SP OUT C-ch No output in MUTE (Q604) state Output enabled state No output in MUTE (Q604) state
(TMX11)
SP OUT S-ch No output in MUTE (Q603) state Output enabled state Output enabled state
(TMX11)
EXPLANATION OF DOLBY SURROUND PRO LOGIC AND EVALUATION METHOD
Test tone output
• Pro Logic ON Normal mode
Press the remote control TEST TONE button.
→Output of only L-ch →Output of only C-ch
↑ ↓
Output of only S-ch ← Output of only R-ch
The test tone (noise) is repeatedly output for output period
(2 sec).
In this case the following indication appears repeatedly.
→TEST →L-ch →C-ch
↑ ↓
S-ch ← R-ch
• Pro Logic ON Phantom mode
Press the remote control TEST TONE button.
→Output of only L-ch →Output of only R-ch
↑ ↓
← Output of only S-ch
The test tone (noise) is repeatedly output for output period
(2 sec).
In this case the following indication appears repeatedly.
→TEST → L-ch → R-ch
↑ ↓
← S-ch←
Outline
• Namely, two speakers are connected in parallel to one
amplifier.
• In the Pro Logic BYPASS mode the amplifier for C-ch (center
channel) and the amplifier for S-ch (surround channel) are in
MUTE state. The SP output is cut.
• In the normal mode of Pro Logic ON mode the amplifiers for
C-ch and S-ch are in operative state, so that the SP output
appears.
• In the Phantom mode of Pro Logic ON mode the amplifier for
C-ch is in MUTE state, so that the SP output is cut. The
amplifier for S-ch (surround) is in operative state, so that the
SP output appears
• State of element output and terminal output in specific mode
Relation between VIDEO IN input and output in Pro Logic
ON state
(1) L-ch/R-ch same phase input into VIDEO IN input jack in
VIDEO Function mode
Output point Normal mode
Output point Phantom mode
(2) L-ch/R-ch reverse phase input into VIDEO IN input jack in
VIDEO Function mode
(Reverse phase: Phase difference between L and R is 180°)
Output point Normal mode
SP out L-ch
Almost no output (only omitting component)
(TMV01) R-ch
Almost no output (only omitting component)
(TMX11) SP out C-ch
Almost no output (only omitting component)
(TMX11) SP out S-ch Input signal is output.
Output point Phantom mode
SP out L-ch
Almost no output (only omitting component)
(TMV01) R-ch
Almost no output (only omitting component)
(TMX11) SP out C-ch SP cut, no output
(TMX11) SP out S-ch Input signal is output.
• Accordingly, if you want to output signal waveform to C-ch SP
out, give the same phase input into L-ch/R-ch INPUT in the
Pro Logic Normal mode.
If one of channels receives input, C-ch does not output. Only
L-ch or R-ch outputs.
• If you want to output signal waveform to S-ch SP out, you can
use either Normal mode or Phantom mode. However, 180°
reverse phase input must be given to L-ch/R-ch INPUT.
CD-K477W
– 18 –
SW1 OPEN/CLOSE ON—OFF
SW2 MECHA UP ON—OFF
SW3 DISC NUMBER ON—OFF
SW4 PICKUP IN ON—OFF
SW991 VOLTAGE SELECTOR 230-240V
SWD1 VOLUME JOG ON—OFF
SWD2 JOG ON—OFF
SWD3 X-BASS ON—OFF
SWD4 PRE EQ ON—OFF
SWD5 MENU ON—OFF
SWD12 TUNING UP/CUE ON—OFF
SWD13 STOP ON—OFF
SWD14 NORMAL EDIT ON—OFF
SWD15 HIGH EDIT ON—OFF
SWD16 REC/PAUSE ON—OFF
SWD17 F-PLAY ON—OFF
SWD19 SUB WOOFER VOLUME UP ON—OFF
SWD20 SUB WOOFER VOLUME DOWN ON—OFF
SWD24 4SP-1 ON—OFF
SWD25 4SP-2 ON—OFF
SWD27 PHANTOM ON—OFF
SWD28 NORMAL ON—OFF
SWD29 BYPASS ON—OFF
SWD30 TUNING DOWN/REWIND ON—OFF
SWD31 CD PAUSE ON—OFF
SWD32 REVERSE MODE ON—OFF
SWD33 R-PLAY ON—OFF
SWD34 CLOCK ON—OFF
SWD35 MEMORY ON—OFF
SWD36 TIMER ON—OFF
SWD37 SLEEP ON—OFF
SWD38 CLEAR ON—OFF
SWD39 VIDEO/AUX 1 ON—OFF
SWD40 VIDEO/AUX 2 ON—OFF
SWD41 TAPE 1/2 ON—OFF
SWD42 TUNER/BAND ON—OFF
SWD43 CD ON—OFF
SWD48 POWER ON—OFF
SWD49 KARAOKE ON—OFF
SWD50 DISC 1 ON—OFF
SWD51 DISC 2 ON—OFF
SWD52 DISC 3 ON—OFF
SWD53 DISC SKIP ON—OFF
SWD54 OPEN/CLOS ON—OFF
SWF2 SPAN SELECTOR 50/9
SWM3 REC FWD ON—OFF
SWM4 REC RVS ON—OFF
SWM5 F.A.S ON—OFF
SWM6 CAM ON—OFF
• The indicated voltage in each section is the one measured
by Digital Multimeter between such a section and the chas-
sis with no signal given.
1. In the tuner section,
( ) indicates AM
< > indicates FM stereo
2. In the main section, a tape is being played back.
3. In the deck section, a tape is being played back.
( ) indicates the record state.
4. In the power section, a tape is being played back.
5. In the CD section, the CD is stopped.
• Parts marked with “ ” ( ) 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
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.
REF. NO DESCRIPTION POSITION POSITIONREF. NO DESCRIPTION
Figure 18 TYPES OF TRANSISTOR AND LED
KTA1266 GR
KTA1270Y
KTA1271 Y
KTC3199 GR
KTC3203 Y
KRA102 M
KRA109 M
KRC102 M
KRC104 M
KRC107 M
2SC535 C
2SD468 C
2SC2878 A
2SD2012
2SB1375
SLR325 MG
SLR325 VR
KL052 UL
SLR505 MC
LMKD515B
KV1236Z23
(S)(G)(D)
(1) (2) (3)
E C B
FRONT
VIEW
FRONT
VIEW
B C E
(D)(G)(S)
(3) (2) (1)
FRONT
VIEW
FRONT VIEW
– 19 –
CD-K477W
Figure 19 BLOCK DIAGRAM (1/3)
8
27
1
2
3
4
5
98
6
7
20
12
13
24
25
30
31
3222
34
35
36
10 11
27
26
28
29
PU-IN SW
XL1
16.934Hz
XIN
LD0
FIN2 JP–
CV+
SLC
SL1
FIN1
E
F
TO
FD
SPO
NC
SLD
SL–
SL+
DRF
CL
DAT
CE
VCC1
6
+5V
PICKUP IN
SW4
FOCUS COIL
TRACKING COIL
M1
SPINDEL
MOTOR
LASER
DRIVE VOLATEG
REGULATOR
M
M
M2
SLED
MOTOR
PICKUP UNIT
9
IC2
LC78622K
SERVO/SIGNAL
CONTROL
+B1
IC3
M56748FP
DRIVER
IC1
LA9241M
SERVO AMP.
6
1
95
+B1
+12V(+B5)
RES. CQCK. COIN
SQOUT. RWC. WRQ
~
~
~
CL, DAT, SELIAL CONTROL/CE Q93
Q91
Q91
SL+. SL–. DRF
7
3
9
8
7
6
5
4
3
2
1
GND (D)
MECHA UP
GND (D)
DISK NO.
OPEN/CLOSE
GND (D)
M–
M+
GND (M)
9
8
7
6
5
4
3
2
1
CNP10
M
+5V
+B1
62 64 45 3623 43
31
40
37
24
25
10 10
265853
10
12
20
32
40
43
44
5352515431302923271615
4144
Q1 Q52
+4.3V Q81 +7.3V (+B9)
REGULATOR
TO MAIN SECTION
IC81
TA7291S
LORDING MOTOR
DRIVER
XOUT
EFMO
EFMIN
CLV+
JP–
CONT2
CONT1
CONT4
DOUT
LCHO
RCHO
VVDD
VDD
LVDD
RVDD
XVDD
SW1
OPEN/CLOSE
SW2
MECHA UP
SW3
DISC No.
M3
LOADING
SOLM1
TO MAIN
SECTION
CNS10
CD-K477W
– 20 –
Figure 20 BLOCK DIAGRAM (2/3)
Q365
QG04
QL19
SO301
ANTENNA
TERMINAL
FM
GND
SW1
SW2
MW
B.P.F
BFT01
6
9
ICT01
TA7358AP
FM FRONT END
1
5 8
FM
OSC
LT01
3
FM
RF
LT02
7
QT01
AMP
T302
MW ANT. T306
MW OSC.
SW1/SW2
ANT.
T303
T304 T307
T308
Q306
Q307
Q308
Q309
SW1 +B
5
PB HEAD
L-CH
R-CH
REC/PB
HEAD
L-CH
R-CH
P.B
AC BIAS
P.B
REC
TAPE 2
TAPE 1
L NF
L(T1)
R(T1)
L(T2)
R(T2)
R NF
L
R
POP REDUCE
L REC
R REC
L
R
REF
+B7
H/N
T1/T2
P.B.
REC
NOR/
HIGH T1/T2
1
24
23
16
14
13
12 15 19 11
10
17
18
20
21
2
3
4
6
9
4
7
8
ERASE
HEAD BIAS OSC.
T1/T2
HI SPEED
SWITCHING
QK28
LK04
QK03 QK05
QK04 QK06
QK17,QK18
QK09 QK07
QK08
ICK01
AN7345K
PLAYBACKuRECORD AMP
QK19
SOLENOID
DRIVER
SOLM1
SOLENOID
T1/T2 CrO
2
T1/T2 PLAY
QL15
QL19
FROM CD UNIT
F.A.S.
SWM5
SWM6
CAM SW
SWM3
REC FWD
SWM4
REC RVS
+B6
HI SPEED
TAPE MOTOR T2 CrO2
M
+B6 MOTOR
DRIVER
QL14
QL18
QL12
VRM1
TAPE SPEED
QL11
QL13 SWITCHING
TA2F/R SPEED
SWITCHING
DRIVER
DRIVER QL17
MM1
TAPE MOTOR
1
33
31 10 25
28
29
27
26
18
19
34
6
5
VR602
MIC2 VOL VR601
MIC1 VOL VR603
DIGITL
ECHO
IC601
M65845FP
MIC AMP.
L
R
L
R
8
4
5
37
1
+B7
L
JR11
AUX-1/
VCR-1
JR12
AUX-2/
VCR-2
ICS03
NJM4565M
PRO LOGIC
AMP
+B7
CAM SW
PHM1 T2_RUN
T2_A_FP
BAIS
BAIS
SWITCHING SWITCHING
HI SPEED
QK26QK24
QK27
QK25
REC
MUTING
QK21
QK22
T2 CrO2
QK30 QK29
QK40
QD01
QD02 PB MUTE
MUTING
QK15
QK16
L NF
R NF
QK13
QK14
QG05
REC
I
C
LV
D
O
PR
O
DE
C
VDD
45
232
4
46
33
+B7
VCC IN
OUT L
R
IN
L
R
L
R
OUT
R
OUT L
QU01
QU02 CD MUTE
IN
FM +B
+B7
Q360
SW2 +B
Q362
+B7
MW +B +B7
Q363 +B7
Q364
FM IF
TT01
FM IF
CF302
GND
AM IF
T351 CF352
FM IN
AM IN
+B7
STEREO
OSC
X352
4.5MHz
FM IF IN
+B7
VCC
OUT
AM
VR351
FM MUTE LEVEL
MONO/ST
FM MONO/ST
IF
OUT
IF IN
+B7
+5V
VOLTAGE
REGURATER
DI
CL
CE
DO
IC302
LC72131
PLL CONTROLLER
IC303
LA1832 FM/AM IF+MPX
X351CF351
AM IN
5 1 2 3 4 8 9
17 18 16
15 14 12 10
13
21
22 23 24
7
1
8
3
4
5
6
7
20
22 15
13
16 11 10 12 17
21
IN
AFC
AM RF IN
9
Q364
6
SD
Q353
Q354
MUTING
L
FM
R
L
56
54
52
58
53
57
50
60
51
59
27 21 49 62 22 26
45
42
39
36
10 46
43
40
37
11 47
44
41
38
12
486
3
56
34
14
L
R
L
R
L
R
L
AUX2
AUX1
TAPE
TUNER
CD
GRAPHIC EQUALIZE
R
R L 2
5
8
R L 1
4
7
R L 3
6
9
L
LVref RVref
R
L
OUT Vref
FMOSC
T2_A-FP
TA_SPEED(M)
TA_BAIS
BEET CUT
TA R/P
TA_PB-EQ
HIGH SPEED
TAPE MOTOR
TAPE SOLENOID
CAM_SW
T2_CrO2
T1_CrO2
T2_B-FP
T2_RUN
T1_RUN
SPE1~5
2
1–B6
4
7
6
8
ICH11(1/2)
BUFFER AMP.
NJM4558M
ICH11(/2)
SPE IN
Q631
MIC1
MIC2
GND
VOLUME
+B7
VOLTAGE
REGULATOR
MIC
IC
U
LC75
3
AUDIO PR
O
OUT
IN
REC-IN
P.B
OUT
TUNER M
U
TUN
E
PB-EQ
SW1/SW2
OSC.
OSC
REG IN
LRR
QK11
QK10
REC/PB
VOICE CA
TA_T1/T2
4
PB MUT
REC_MUTE
R
R
R
Vss
/