Sharp CD-K491W User manual

– 1 –
CD-K491W
No.S0883CDK491W/
CONTENTS
Page
SAFETY PRECAUTION FOR SERVICE MANUAL ........................................................................................................... 2
VOLTAGE SELECTION..................................................................................................................................................... 2
SPECIFICATIONS ............................................................................................................................................................. 3
NAMES OF PARTS ........................................................................................................................................................... 4
OPERATION MANUAL ...................................................................................................................................................... 7
DISASSEMBLY.................................................................................................................................................................. 8
REMOVING AND REINSTALLING THE MAIN PARTS................................................................................................... 11
ADJUSTMENT ................................................................................................................................................................. 12
NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 16
TYPES OF TRANSISTOR AND LED................................................................................................................................16
BLOCK DIAGRAM ........................................................................................................................................................... 17
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD............................................................................................. 22
WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 52
TROUBLESHOOTING ..................................................................................................................................................... 53
FUNCTION TABLE OF IC................................................................................................................................................ 57
FL DISPLAY..................................................................................................................................................................... 68
REPLACEMENT PARTS LIST/EXPLODED VIEW
CD-K491W
• 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
CD-K491WminicomponentsystemconsistingofCD-K491W
mini component system, CP-K491, CP-SW491, centre
(GBOXS0010AWM3) and surround (GBOXS0011AWM3)
speaker system.
Manufactured under license from Dolby Laboratories.
"Dolby", "Pro Logic" and the double-D symbol are trademarks
of Dolby Laboratories. Confidential Unpublished Works.
©1992-1997 Dolby Laboratories, Inc. All rights reserved.
QSOUND and the QLogo are registered trademarks of
QSound Labs, Inc.
QSound is protected under US Patent Nos. 5,105,462 and
5,208,860 and foreign counterparts.

CD-K491W
– 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
IMPORTANTTHATTHEFOLLOWINGPRECAUTIONSAREOBSERVEDDURINGSERVICINGTOPROTECTYOUREYES
AGAINST EXPOSURE TO THE LASER BEAM.
1-WHENTHECABINETISREMOVED,THEPOWERISTURNEDONWITDOUTACOMPACTDISCINPOSITIONANDTHE
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.
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
92LPLUG027 92LPLUG155A
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 pro-
cedures 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.
QACCB0006AW00

– 3 –
CD-K491W
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
CD-K491W
Specifications for this model are subject to change without
prior notice.
SPECIFICATIONS
CP-K491
CP-SW491
GBOXS0010AWM3
GBOXS0011AWM3
●General
Power source: AC 110/127/220/230 - 240 V,
50/60 Hz
Power consumption: 200 W
Dimensions: Width; 270 mm (10-5/8")
Height; 316 mm (12-1/2")
Depth; 343 mm (13-1/2")
Weight: 10.5 kg (23.2 lbs.)
●Amplifier section
Output power: PMPO; 2,000 W (total)
Front speakers;
MPO; 142 W (71 W + 71 W)
(10 % T.H.D.)
RMS: 80 W (40 W + 40 W)
(10 % T.H.D.)
Centre speaker;
MPO; 71 W
(10 % T.H.D.)
RMS: 40 W
(10 % T.H.D.)
Surround speakers;
MPO; 142 W (71 W + 71 W)
(10 % T.H.D.)
RMS: 80 W (40 W + 40 W)
(10 % T.H.D.)
Sub woofer;
MPO; 71 W
(10 % T.H.D.)
RMS: 40 W
(10 % T.H.D.)
Output terminals: Front speakers; 8 ohms
Centre speaker; 8 ohms
Surround speakers; 8 ohms
Sub woofer; 8 ohms
Monitor; 1 Vp-p/75 ohms
Headphones; 16 - 50 ohms
(recommended; 32 ohms)
Input terminals: DVD 1 (Digital); Optical
DVD 2 (Digital); Coaxial
VCR 1/AUX 1; 500 mV/47 kohms
VCR 2/AUX 2; 500 mV/47 kohms
DVD 1/VCR 1; 1 Vp-p/75 ohms
DVD 2/VCR 2; 1 Vp-p/75 ohms
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: 100 dB (1 kHz)
●Front speaker section
Type: 3-way, 130 mm (5-1/8") woofer,
50 mm (2") tweeter and super
tweeter
Maximum input power: 80 W
Rated input power: 40 W
Impedance: 8 ohms
Dimensions: Width; 220 mm (8-11/16")
Height; 316 mm (12-1/2")
Depth; 284 mm (11-3/16")
Weight: 3.4 kg (7.5 lbs.)/each
●Centre speaker section
Type: 2-way, 120 mm (4-3/4") woofer
and 50 mm (2") tweeter
Maximum input power: 80 W
Rated input power: 40 W
Impedance: 8 ohms
Dimensions: Width; 270 mm (10-5/8")
Height; 142 mm (5-5/8")
Depth; 220 mm (8-11/16")
Weight: 1.8 kg (4.0 lbs.)
●Surround speaker section
Type: 2-way, 100 mm (4") woofer and
50 mm (2") tweeter
Maximum input power: 80 W
Rated input power: 40 W
Impedance: 8 ohms
Dimensions: Width; 200 mm (7-7/8")
Height; 134 mm (5-5/16")
Depth; 240 mm (9-1/2")
Weight: 1.4 kg (3.1 lbs.)/each
●Sub woofer section
Type: 160 mm (6-1/2") woofer
Maximum input power: 80 W
Rated input power: 40 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.)

CD-K491W
– 4 –
NAMES OF PARTS
CD-K491W
■Front panel
1. Disc Tray
2. Disc Number Selector Buttons
3. Disc Skip Button
4. Open/Close Button
5. Left Front Speaker Indicator
6. LFE Indicator
7. Centre Speaker Indicator
8. Right Front Speaker Indicator
9. Dolby Pro Logic Indicator
10. Dolby Virtual Indicator
11. Left Surround Speaker Indicator
12. Surround Signal Indicator
13. Sub Woofer Indicator
14. Right Surround Speaker Indicator
15. Dolby Digital Indicator
16. (CD) Disc Number Indicator
17. (TAPE) Direction Indicator
18. (CD) Play Indicator
19. (CD) Repeat Play Indicator
20. (CD) Pause Indicator
21. (TAPE) Record Indicator
22. (TAPE) Reverse Mode Indicator
23. Spectrum Analyzer Indicator
24. (TUNER) FM Stereo Indicator
25. (TUNER) FM Stereo Mode Indicator
26. Karaoke Maker Indicator
27. Timer Record Indicator
28. (CD) Random Play Indicator
29. Extra Bass Indicator
30. Timer Play Indicator
31. Sleep Indicator
32. (CD/TUNER) Memory Indicator
33. Function Selector Buttons
34. Surround Mode Selector Buttons
35. Equalizer Selector/Demo Mode Button
36. Extra Bass Button
37. Volume Control
38. On/Stand-by Button
39. Headphone Socket
40. Karaoke Maker Switch
41. Microphone Sockets
42. Microphone Level Controls
43. Digital Echo Control
1234
5
6
7
89
10
11 1213 1415
16 17
18 19 2021 22
23
24 25
26
27 28 29
30 31 32
33 36 37
38 39 41 43
34 35
40 42

– 5 –
CD-K491W
62 63
VIDEO OUT
MONITOR
SPAN
SELECTOR
FM/MW(kHZ)
50/9
100/10
1234
5
67 8
10
11
13
15 16 17 18
9
12
14
44 45 46 47 48 49 50 51 52
53 54 55 56 57 58 59 60 61
■Rear panel
44. Clock Button
45. Sleep Button
46. Reverse Mode Button
47. CD Pause Button
48. Jog Dial
49. (CD/TAPE) Stop Button
50. Record Pause Button
51. Menu Button
52. Item Button
53. Timer Button
54. Memory Button
55. Clear Button
56. (CD) Track Down/Review Button
(TAPE 2) Fast Wind Button
(TUNER) Tuning Down Button
57. (TAPE 2) Reverse Play Button
58. (CD) Play/Repeat Button
(TAPE 1) Play Button
(TAPE 2) Forward Play Button
59. (CD) Track Up/Cue Button
(TAPE) Fast Wind Button
(TUNER) Tuning Up Button
60. (TAPE) Normal Edit Button
61. (TAPE) High Edit/Beat Cancel Button
62. (TAPE 1) Cassette Compartment
63. (TAPE 2) Cassette Compartment
1. DVD 1 Digital Input Socket (Optical)
2. DVD 2 Digital Input Socket (Coaxial)
3. DVD 1/VCR 1 Video Input Socket
4. DVD 2/VCR 2 Video Input Socket
5. Video Output Socket
6. CD Digital Output Socket (Optical)
7. VCR 1/AUX 1 Input Socket
8. VCR 2/AUX 2 Input Socket
9. Span Selector Switch
10. 75 Ohm FM Aerial Socket
11. Aerial Earth Terminal
12. SW1/SW2/MW Aerial Terminal
13. AC Voltage Selector
14. AC Power Lead
15. Front Speaker Terminals
16. Centre Speaker Terminals
17. Surround Speaker Terminals
18. Sub Woofer Terminals

CD-K491W
– 6 –
GBOXS0010AWM3
GBOXS0011AWM3
CP-K491 CP-SW491
Front speakers
1. Super Tweeter
2. Tweeter
3. Woofer
4. Bass Reflex Duct
5. Speaker Terminals
Sub Woofer
1. Woofer
2. Bass Reflex Duct
3. Speaker Terminals
Centre speaker
1. Tweeter
2. Woofer
3. Speaker Terminals
Surround speakers
1. Tweeter
2. Woofer
3. Speaker Terminals
1
2
3
4
5
1
2
3
1
23
1
2
3
1
2
3
456
7
8
9
10
11
12
13
14
15 16
17 18 19 20
21
22
23
24
25 26
27
■Remote control
1. Remote Control Transmiter LED
2. Surround Mode Selector Buttons
3. Sub Woofer Level Control Buttons
4. Setup Up/Down Buttons
5. Menu Button
6. Item Button
●Tuner control section
7. Preset Up/Down Buttons
●CD control section
8. Track Up/Cue Button
9. 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. Stop Button
20. (TAPE 1) Play Button
(TAPE 2) Forward Play Button
21. (TAPE 2) Fast Wind Buttons
●Common section
22. Extra Bass Button
23. Equalizer Mode Button
24. Function Selector Buttons
25. On/Stand-by Button
26. Volume Control Buttons
27. Dimmer Button

– 7 –
CD-K491W
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 42).
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 anticlockwise, 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 anticlockwise, 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: ➀Press the MEMORY button. ➁Perform steps 6 - 9 above. When the unit is on: ➀Press the CLOCK button. ➁Within 5 seconds, press the MEMORY button. ➂Perform 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: ➀Perform steps 1 and 2 in the section "RESETTING THE MI-
CROCOMPUTER", on page 42.
➁Perform steps 1 - 9 above.
CLOCK ON/ STAND-BY MEMORY TUNING
( )
Jog dial
In this example, the clock is set for the 12-hour (AM 12:00) system.
0:00 AM 12:00 AM 0:00
2 3
4
5 6
7 8
9
SPAN
SELECTOR
FM/MW(kHz)
50/9
100/10
(Continued)
■FM/MW interval (span)
The International Telecommunication Union (ITU) has established that member countries should maintain either a 10 kHz or a 9 kHz interval between broadcasting frequencies of any MW sta- tion. 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:
1Press the ON/STAND-BY button to enter the stand-by mode. 2Set 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).
3Press 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.
RESETTING THE MICROCOMPUTER
ON/
STAND-BY
EQUALIZER
/DEMO
Reset the microcomputer by performing the following
procedure for the cases shown below:
●To erase all of the stored memory contents, or
●If the display does not function properly, or
●The unit does not operate properly.
1
Press the ON/STAND-BY button to enter the stand-by
mode.
2
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.
(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.
Notes concerning use: ●Replace the batteries if control distance decreases or 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
0.2 m - 6 m (8" - 20')

CD-K491W
– 8 –
1 Top Cabinet 1. Screw ..................... (A1) x4 8-1
2 Side Panel 1. Screw ..................... (B1) x8 8-1
(Left/right)
3 CD Player Unit/ 1. Turn on the power supply, 8-2
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 8-2,9-1
4 Dolby PWB 1. Flat cable ............... (D1) x2 9-1
2. Socket .................... (D2) x1
3. Screw ..................... (D3) x12
5 Tuner PWB 1. Socket .................... (E1) x1 9-1
2. Screw ..................... (E2) x5
6 Rear Panel 1. Screw ..................... (F1) x11 8-2
................................... 9-1
7 Main PWB 1. Flat cable ............... (G1) x2 9-1
2. Flat wire ................. (G2) x3
3. Socket...................... (G3) x5
4. Screw....................... (G4) x3
8 Karaoke PWB 1.Screw ...................... (H1) x3 9-2
9 Front Panel 1. Flat wire ................. (J1) x1 9-2
2. Screw...................... (J2) x2
10 Power Amp. PWB 1. Socket .................... (K1) x3 9-2
with Heat Sink 2. Screw ..................... (K2) x6
11 Power Supply PWB 1. Screw ..................... (L1) x6 9-3
12 Display PWB 1. Knob....................... (M1) x2 9-4
2. Nut.......................... (M2) x1
3. Screw ..................... (M3) x12
13 CD Switch PWB 1. Screw ..................... (N1) x3 9-4
14 Headphones 1. Screw ..................... (P1) x1 9-4
15 Tape Mechanism 1. Open the cassette Lid.
2. Screw ..................... (Q1) x6 9-4
16 Turntable 1. Screw ..................... (R1) x1 9-5
2. Cover ..................... (R2) x1
17 Disc Tlay 1. Screw ..................... (S1) x2 9-5
2. Guide ..................... (S2) x2
18 CD Servo PWB 1. Screw ..................... (T1) x1 9-6
2. Socket .................... (T2) x4
19 CD Changer 1. Screw ..................... (U1) x4 10-1
Mechanism
20 CD Mechanism 1. Screw ..................... (V1) x1 10-1
DISASSEMBLY
Caution on Disassembly
Follow the below-mentioned notes when disassembling
the unit and reassembling it, to keep it safe and ensure
excellent performance:
1. Take cassette tape and compact disc out of the unit.
2. Be sure to remove the power supply plug from the wall
outlet before starting to disassemble the unit.
3.Takeoff nylon bands or wire holders wheretheyneed to
beremovedwhendisassemblingtheunit.Afterservicing
theunit,be sure to rearrange the leads wheretheywere
before disassembling.
4. Take suffcient care on static electricity of integrated
circuits and other circuits when servicing.
Figure 8-2
Figure 8-3
CD-K491W
STEP REMOVAL PROCEDURE FIGURE
Note 1:
How to open the changer manually. (Fig. 8-3)
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.
Figure 8-1
CD-K491W
( 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
CD Tray Cover
CD Player
Unit
( F1 ) x10
ø3 x8mm
( C3 ) x1
ø3 x8mm
Hook
( C1) x3
( C2 ) x1
( C4 ) x2
Rear Panel
Main PWB
Front Panel
1
1
2
Tuner PWB
Pull
(C2) x1
LOCK
LEVER

– 9 –
CD-K491W
Figure 9-1
Figure 9-2
Figure 9-3
Figure 9-4
Figure 9-5
Figure 9-6
(E2) x4
ø3 x10mm
(D3) x4
ø3x10mm
(F1) x1
ø3 x10mm
(D3) x8
ø3x10mm
(E2) x1
ø3x10mm
(G4) x2
ø3x10mm
(G4) x1
ø3x10mm
(G3) x2
(G1) x2
(D1) x1 (G2) x1
(G3)
@ x2
(G3) x1
(G2) x2
Rear Panel
Main PWB
Tuner PWB
Dolby PWB
Front Panel
(D2) x1
(C4) x1
(D1) x1
(E1) x1
(K2)x5
ø3x10mm
(H1)x1
ø3x10mm
(H1)x2
ø3x10mm
Front Panel
( K2 ) x1
ø3x10mm ( J2 ) x2 ø3x10mm
(K1 ) x2
( K1 ) x1
(J1 ) x1
Power Amp. PWB
Karaoke
PWB
(L1)x4
ø4x8mm
(L1)x1
ø3x10mm
(L1)x1
ø3x10mm
Power Supply PWB
(N1)x3
ø3x10mm
(Q1)x6
ø3x10mm
(P1)x1
ø3x10mm
Open
Headphones
PWB
Display
PWB
(M1)x2
(M2)x1
Washer
Tape Mechanism
Cassette
Holder (Left/Right)
Front Panel
CD Switch PWB
(M3)x12
ø3x10mm
( S1 ) x1
ø3 x10mm
( S1 ) x1
ø3 x10mm
( R1 ) x1
ø3 x10mm
Turntable
Disc Tray
( R2 ) x1
( S2 ) x1
( S2 ) x1
CD Player Unit
( T1 ) x1
ø3 x10mm
( T2 ) x2
( T2 ) x2 CD Player Unit
CD Servo PWB

CD-K491W
– 10 –
CP-K491
1 Front Speaker 1. Net.......................... (A1) x1 10-2
2. Baffle Board ........... (A2) x1
3. Screw ..................... (A3) x2
4. Screw ..................... (A4) x4
5. Screw ..................... (A5) x2
STEP REMOVAL PROCEDURE FIGURE
CP-K491
Figure 10-2
CP-SW491
Figure 10-3
CP-SW491
1 Sub woofer 1. Net.......................... (A1) x1 10-3
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.
InstalltheCDchangermechanismontheCDplayerbaseafter
the shift lever has been set in the highest position.
Figure 10-1
( U1 ) x4
ø3 x12mm
( V1 ) x1
ø2.6 x10mm
CD Changer
Mechanism
CD Mechanism
Shift Lever
CD Player Base
Screw driver
Woofer
Woofer
Net
(A1)x1
Baffle Board
(A2)x1
Tweeter
Tweeter
Super
Tweeter (A5)x2
ø3x10mm
(A3)x2
ø3x10mm
(A4)x4
ø4x16mm
( A3 ) x4
ø4 x16mm
Net
( A1 ) x1
( A2 ) x1 Screwdriver
Woofer

– 11 –
CD-K491W
How to remove the pickup (See Fig. 11-2)
1.Remove the screws (B1) x 2 pcs., to removethe shaft (B2).
2. Remove the stop washer (B3) x 1 pc., to remove the gear
(B4).
3. Remove the pickup.
Figure 11-2
REMOVING AND REINSTALLING THE MAIN PARTS
CD MECHANISM SECTION
Performsteps1,2,3,16,17, 18,19and20ofthedisassembly
method to remove the CD mechanism.
How to remove the loading motor
(See Fig. 11-1)
1. Remove the screws (A1) x 2 pcs., to remove the loading
motor.
Figure 11-1
( 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

CD-K491W
– 12 –
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 12
VRM01
TAPE
SPEED
FAS
SW
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

– 13 –
CD-K491W
Figure 13 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-K491W
– 14 –
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 14-2 Figure 14-3
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. 14-2)
2. Tracking offset (Fig. 14-3)
3. E/F balance (tracking error balance) (Fig. 14-4)
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 14-1
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.
<CD> + <EQ> + <POWER> TEST: CD operation test
• TEST mode
Function — CD test mode
Setting of TEST mode
Indication of CD TST mode (Fig. 14-1)
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 14-4
IL is not performed.
<STOP>

– 15 –
CD-K491W
DVD 1
/VCR 1 DVD 2 /VCR 2
DVD 1
/VCR 1 DVD 2 /VCR 2
When you connect this unit to a DVD player which is playing
a disc with the trademark, you can enjoy
realistic, powerful sound by playing back the recorded signal
through 6 speakers with the sound coming from the front
left, front right, centre, surround left, surround right and sub
woofer speakers.
To listen to a disc using the Dolby Digital mode:
1 Connect a DVD player. (See page 39.)
2 Press the DVD 1/VCR 1 or DVD 2/VCR 2 button to select
"DVD 1" or "DVD 2".
3 Start the DVD player.
Note:
●When the Dolby Digital surround mode is being used, the
equalizer will be set to FLAT.
Type of Dolby digital signal
There are different types of Dolby digital signals. The type of Dolby digital signal being input into this unit can be checked
in the display.
Display Channels available Display Channels available
Normal PCM playback Front (L, R) + surround
(L, R)
Centre only (monaural) Front (L, R) + centre
Front (L, R)
(When the surround mode
is set to Normal or
Phantom, sound will also be
heard from the surround
speakers.)
Front (L, R) + centre +
surround (monaural)
Front (L, R) + surround
(monaural) Front (L, R) + centre + surround (L, R)
●If a low frequency sound effect (Low Frequency Effect) contains a Dolby digital signal, "LFE" will light in the display.
When this "LFE" is lit, low frequency signals will be output from the sub woofer.
DOLBY DIGITAL
SURROUND EFFECT CONTROL
This product allows you to enjoy 4 surround modes.
Normal mode:
When you play a sound source that has the
(5.1 channels) or trademarks, you can enjoy
surround sound using all 6 speakers.
Phantom mode:
When you play a sound source that has the
or trademarks, you can enjoy surround sound
using 5 speakers, but not the centre speaker.
Virtual Dolby Surround:
You can enjoy a three-dimensional surround stereo image
using just the 2 front speakers.
Enhanced Virtual Surround:
You can enjoy surround sound, using only the 2 front
speakers, but this mode increases the three-dimensional
stereo image effect even more.

CD-K491W
– 16 –
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
SWD01 VOLUME JOG ON—OFF
SWD02 JOG ON—OFF
SWD03 X-BASS ON—OFF
SWD04 PRE EQ. ON—OFF
SWD05 MENU ON—OFF
SWD06 ITEM 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
SWD23 QSOUND ON—OFF
SWD26 VIRTUAL 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 DVD/VIDEO 1 ON—OFF
SWD40 DVD/VIDEO 2 ON—OFF
SWD41 TAPE 1/2 ON—OFF
SWD42 TUNER/BAND ON—OFF
SWD43 CD ON—OFF
SWD48 POWER/STAND-BY 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/CLOSE ON—OFF
SWF02 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
electrolyticcapacitor,theexpression“capacitance/withstand
voltage” is used.
(CH), (TH), (RH), (UJ): Temperature compensation
(ML): Mylar type
(P.P.): Polypropylene type
•Schematic diagram and Wiring Side of P.W.Board for this
model are subject to change for improvement without prior
notice.
REF. NO DESCRIPTION POSITION POSITIONREF. NO DESCRIPTION
Figure 16 TYPES OF TRANSISTOR AND LED
E
(S)
(1)
C
(G)
(2)
B
(D)
(3)
B
(D)
(3)
C
(G)
(2)
E
(S)
(1)
FRONT
VIEW FRONT VIEW
2SD2012
2SB1375
FRONT
VIEW
SLR325MG
SLR325VR
KL052UL
SLR505MC
LMKD515B
FRONT VIEW
KV1236Z23
2SC1845 F
2SC2236 Y
2SC2878 A
2SC2878 B
2SC535 C
2SD468 C
KRA102 M
KRA107 M
KRC102 M
KRC104 M
KRC107 M
KTA1266 GR
KTA1268 GR
KTA1270 Y
KTA1271 Y
KTA1273 Y
KTC3199 GR
KTC3203 Y
3
2
1
FRONT
VIEW
KRA107 S
KRC102 S
KRC107 S

– 17 –
CD-K491W
Figure 17 BLOCK DIAGRAM (1/5)
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
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
DISC
MOTOR
M
M
M2
SLIDE
MOTOR
PICKUP UNIT
9
IC2
LC78622K
SERVO/SIGNAL
CONTROL
+B1
IC3
M56748FP
DRIVER
IC1
LA9241M
SERVO AMP.
6
1
95
+B1
+12V(+B6)
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
+B8
62 64 45 3623 43
31
24 25
10 10
265853
10 12 20
32 40 43 44
5352515431302923271615
4144
Q1 Q52
+4.3V Q81 +7.3V (+B8)
REGULATOR
TO MAIN SECTION
IC81
TA7291S
LORDING MOTOR
DRIVER
XOUT
EFMO EFMIN CLV+ JP–
CONT2 CONT1
CONT4
DOUT
VVDD
VDD
LVDD
RVDD
XVDD
SW1 OPEN/CLOSE
SW2 MECHA UP SW3 DISC No.
M3 LOADING
SOLM1
TO MAIN SECTION
CNS10

CD-K491W
– 18 –
Figure 18 BLOCK DIAGRAM (2/5)
13 8
10
1 4
6
7
14
TOS
ICA14
GP1F38R
DVD2
DIGITAL
IN ICA15
TC74HCU04
INVERTER
IN
IN
DVD2
DIGITAL
IN
FROM CD UNIT
4
3
5
8
7
1 6 11 ~ 1315
+B13
IN
IN
IN
ICA16
TC74HCU15
SWITCH
61
D4-GND D4-GND
14
13
12
11
D-OUT
DEM0
DEM1
16
17
15 SCK
CLK
CLK2L/R
83 79 91
D-IN CLK2L/R OUT
92
CLK2OUT
97 9
5
8
6
85
62
60
36
4
D3-GND
D-OUT D-IN
SL/SR OUT
SL/SR IN
ANAROG LCH
4 7
IN
2 1 6
7
IN
6
3
4
5
6
23 24
PWDA PWAD
AINR+
AINR–
AINL+
AINL–
2
8
18
19
20
22
25
1 7 9 10 21
+B13+B9
AINR–
AINL–
AINL+
IN
IN
TO
MAIN
SECTION
OUT
OUT
OUT
ICA13
AK4520A
A/D,D/A
CONVERTER
ANAROG RCH
ICA11
NJM4580M
LOW PASS FILTER &
DIFFERENTIAL AMP A-GND
8
4
2 1
8
+B7
A-GND
A-GND
+B7
ICA12
NJM4580M
LOW PASS FILTER &
DIFFERENTIAL AMP
27 LS OUT
RS OUT
26
VIDEO1 IN
VIDEO2 IN
MONITOR
OUT
1
7
3
+B7
2
4
8
6
+B7
ICH51
NJM2246M
SWITCH
QH51
V-GND
LS/RS
OUT
DGTL2
V1/V2
16 +B13
2 DGTL2
9
14 DGTL1
V1/V2 DGTL2 DGTL1
QH52
QH53 DGTL2
V1/V2
SWITCHING
SWITCHING
JA11
JH51

– 19 –
CD-K491W
Figure 19 BLOCK DIAGRAM (3/5)
9
7
12
13
5
DEM0
DEM1
XT1
BICK
LRCK
6
PD
16
20
22
2
14
15
24
8
18
17
+B12
1 3
10 11 21
A-GND
D3-GND
CENTER
SUB
WOOFER
CENTER
SUB
WOOFER
54
80
9
7
12
13
5
DEM0
DEM1
XT1
BICK
LRCK
6
PD
16
20
22
2
14
15
24
8
FL/FR
18
17
FL
FR
+B12
1 3
10 11 21
A-GND
D3-GND
89
87
82
34
3
SS SO RESET SCK SI
9
1
CLK2L/R
OUT
92
CLK2OUT
97 95 66
CLK2L/R
CLK
SCK
SCK2IN
5
55 59 67 70 81 84 93
+B13
6
12 17 30 35 45
48
90
78
94
86
85
62
6
0
2 8
19 29 37 44 53 65 68 71
D3-GND
CENTER
SUB
WOOFER
OUT IN
IN OUT
FL/FR OUT
ICA18
ZR38600
DOLBY AC-3 /5.1
MPEG2 AUDIO
DECORDER
SUB
WOOFER
OUT FL/FR
OUT CENTER OUT
SS SO SCK SI DEMO1 DEMO0
AC3 RESET
SUB
WOOFER
ON/OFF
AD RESET
4
8 SUB
WOOFER
IN
4
5 6
12
13
QA03
11
10
A-GND 7
14
QA01
QA02
–B12
+B12
8
1
9
2 5
7
–B12
+B7
ICA21
NJM4580M
–15dB AMP
SUB
WOOFER
OUT
SUB
WOOFER
ON/OFF
SWITCHING
FL/FR
VOLTAGE
REGURATER
VOLTAGE
REGURATER
+B7
+B12
–B6–B12
VOLTAGE
REGURATER
UN-SWITCHED
+B9
+B13 QB01
ICA19
AK4321
D/A
CONVERTER
ICA20
AK4321
D/A
CONVERTER
GND
VDD
4
8
+B7
–B12
3
5
1
7 IN
MIX
L
R
OUT
ICB01
NJM4580M
MIX AMP
SUB
WOOFER
ICA22
BU4066BCE
SWITCH
TO MAIN SECTION
TO MAIN SECTION

CD-K491W
– 20 –
Figure 20 BLOCK DIAGRAM (4/5)
J602
MIC2
J602
MIC1
VR602
MIC2
VOLUME
VR601
MIC1
VOLUME
VR603
DIGITAL ECHO
VOLUME
IC601
M65845FP
MIC AMP. L
R
10 25
26
19 18
27
29
28
31
1
6
5
Q631 +B7
VOLTAGE
REGULATOR
VCCMIC
IN GNDIN
OUT
MIC2 IN
MIC SW
MIC1
VOL IN MIC2
VOL IN ECHO
VOL IN
43
8
1712
2113
20
1011161522
1
321
231
4
17
985
16
15
6
1412101321222324
7
18
9
7
38
5
1
9
6
7
6
5
DO
CE
CL
DI
MUTING
VOLTAGE
REGURATER
+B7
RL
Q353
Q354
IF IN
IF OUT
FM MONO/ST MONO/ST
VR351
FM MUTE LEVEL AM OSC
REGOUT
FM IF IN
X352
4.5MHz
OSC
STEREO
+B7
AM IN FM IN
FMOSC
T351
AM IF AM IF
CF352
IN
X351 456KHz
FM IF CF351
VCC
+B7
GND
QT01
Q360
IC303
LA1832
FM IF DET./FM MPX./AM IF
Q361
BFT01
GND
SW1
SW2
MW
FM
FM BAND
PASS FILTER
SW2 +B
SW1 +B
Q364
Q363
+B7 +B7
Q308
Q309 Q306 Q307
MW +B
T307
T308
T303
T304
SW1/SW2
OSC.
SW1/SW2
ANT.
T306
MW OSC.
T302
MW ANT.
+B7
AMP
LT02
FM RF
LT01
FM OSC
ICT01
TA7358AP
FM FRONT END
TT01
FM IF CF302 FM IF
OUT
AM RF IN
AFC
IN
Q362
+B7
FM +B FM
SO301
ANTENNA
TERMINAL
AM IN
IC302
LC72131
PLL CONTROLLER
+12V
IN
OUT
SD
33 34
VOICE C
MIC
DET
1
9
5
3
7
1
8
4
7
16
11
15
14
12
10
13
1
5
2
4
2
1
24
23
2
3
4
4
5
67
8
9
16
14
13
12 15 19
10
17
18
20
21
4
40
1
20
3
L
SPE IN
L-IN
RIN
L-OUT
L
R
L
R
R
L
L
R
TAPE L
R
FUNC-A
FUNC-B
RIN
OUT
L
R
ICZ09
NJM4565M
LINE AMP.
–B10 +B10
+B10
–B10
TUNER
VCR 1
VCR 2
L
JR11
VCR/AUX1
JR12
VCR/AUX2
ICH11
MOTOR
DRIVE
SWITCHING
M
MM1
TAPE
MOTOR
+B2
TA MOT H/L
HI SPEED
TA MOT SW
DRIVER
MOTOR
DRIVER
DRIVER
QL13
QL11
QL12
QL18
QL14
T1/T2 SOLENOID
DRIVER
SOLM1
SOLENOID
T1/T2 CrO
2
QL15
QL19
SWM5
T1 RUN2SW
SWM6
CAM SW
SWM3
REC FWD
SWM4
REC REV
SWM1
T1 CrO
2
SWM2
T2 CrO 2
+B6
CAM SW
PHM1
T22RUN
QK13
QK14
QL16
ERASE
HEAD
L-CH
R-CH
PB HEAD
L-CH
R-CH
REC/PB
HEAD
P.B
AC BIAS
P.B
REC
TAPE 2
TAPE 1
T1/T2
L NF
R NF
L(T1)
R(T1)
L(T2)
R(T2)
L
R
POP REDUCE
L REC
R REC
L
R REC
ALC
NOR/
HIGH T1/T2
REF
+B7
P.B
REC/PB
MUTING
MUTING
PB MUTE
REC MUTE
L NF
R NF
SWITCHING
SWITCHING
QK21
QK22
QK28
LK04
QK07
QK08
QK11
QK10
QK09
QK03 QK05
QK04 QK06
QK17 QK18
QK19
QK15
QK16
QK17
QK18
SWITCHING
BAIS QK26QK24 BAIS
PB-EQ
T1 Cr0
2
T2 Cr0
2
HI SPEED
T2 REV-REC
T2 FWD-REC
QK31
QK32
QK27
Cr0
2
QK25
SWITCHING
BEAT CHANCEL
SWITCHING
LEVEL SHIFT
QK30
QK29
QK40
QZ03
QZ04
ICZ08
TC4052BF
DUAL 4CH ANALOG
MULTIPLEXER
TO DOLBY SECTION
ICK01 AN7345K
PLAYBACK&RECORD AMP
H/N
T1/T2
P.B.
REC
R
R
QL17
REC/PB
Cr0
2
SWITCHING
L
QG04
BIAS OSC.
VRM1
TAPE
SPEED
67
8
4
+B7
-B6
ICH11
MOTOR
DRIVE