Sharp CDPC-1881-V Service manual

SERVICE MANUAL
y
NTSC/PAL
Manufactured under license from Dolby Laboratories Licensing Corporation. DOLBY, the double-D symbol trademarks of Dolb
Laboratories Licensing Corporation.
and “PRO LOGIC” are
CD-PC1881V
No. S0961CDPC1881
CD-PC1881V
CD-PC1881V Video CD Mini System consisting of CD-PC1881V (main unit), CP-C881 (front speakers), CP-SW881 (sub woofer), GBOXS0026AWM1 (center speaker) and GBOXS0027AWM1 (surround speakers).
• In the interests of user-safety the set should be restored to its original condition and only parts identical to those specified be used.
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.................................................................................................................................................................. 8
REMOVING AND REINSTALLING THE MAIN PARTS................................................................................................... 11
ADJUSTMENT ................................................................................................................................................................. 12
BLOCK DIAGRAM ........................................................................................................................................................... 15
SCHEMATIC DIAGRAM .................................................................................................................................................. 18
VOLTAGE ........................................................................................................................................................................ 30
WIRING SIDE OF P.W.BOARD....................................................................................................................................... 31
NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 38
TYPES OF TRANSISTOR AND LED............................................................................................................................... 38
WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 39
TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 40
FUNCTION TABLE OF IC................................................................................................................................................ 44
FL SEGMENT ...................................................................................................................................................................56
PARTS GUIDE/EXPLODED VIEW
SHARP CORPORATION
– 1 –
for after sales service only. The contents are subject to change without notice.
CD-PC1881V
SAFETY PRECAUTION FOR SERVICE MANUAL
Precaution to be taken when replacing and servicing the Laser Pickup.
The AEL (Accessible Emission Level) of Laser Power Output for this model is specified to be lower than Class I Requirements. However, the following precautions must be observed during servicing to protect your eyes against exposure to the Laser beam.
(1) When the cabinet has been removed, the power is turned on without a compact disc, and the Pickup is on a position outer than
the lead-in position, the Laser will light for several seconds to detect a disc. Do not look into the Pickup Lens. (2) The Laser Power Output of the Pickup inside the unit and replacement service parts have already been adjusted prior to shipping. (3) No adjustment to the Laser Power should be attempted when replacing or servicing the Pickup. (4) Under no circumstances look directly into the Pickup Lens at any time. (5) CAUTION - Use of controls or adjustments, or performance of procedures other than those specified herein may result in
hazardous radiation exposure.
CAUTION Laser Diode Properties
This Video CD Mini 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 procedures 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.
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.
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 unitil the correct voltage figure is displayed in the window next the adjustment screw.
QACCA0001AW00
QACCB0006AW00
QACCE0008AW00
Figure 2 AC POWER SUPPLY CORD AND AC PLUG ADAPTOR
QACCJ0003AW00
QACCL0005AW00
QPLGA0003AWZZ QPLGA0004AWZZ
– 2 –
CD-PC1881V
g
)
CD-PC1881V
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL.
SPECIFICATIONS
General
Power source: AC 110/127/220/230-240 V, 50/60 Hz Power consumption: 140 W Dimensions: Width; 270 mm (10-5/8")
Height; 300 mm (11-13/16") Depth; 362 mm (14-1/4")
Weight: 8.1 kg (17.7 lbs.)
Amplifier section
Output power: Front speakers;
MPO; 176 W(88 W + 88 W) (10 % T.H.D.) RMS; 80 W (40 W + 40 W) (10 % T.H.D.) RMS; 72 W (36 W + 36 W) (0.9 % T.H.D.)
Center speaker;
MPO; 32 W (10 % T.H.D.) RMS; 20 W (10 % T.H.D) RMS; 14 W (0.9 % T.H.D)
Surround speakers;
MPO; 32 W (16 W + 16 W) (10 % T.H.D.) RMS; 20 W (10 W + 10 W) (10 % T.H.D.) RMS; 14 W (7 W + 7 W) (0.9 % T.H.D.)
Sub woofer;
MPO; 72 W (10 % T.H.D.) RMS; 40 W (10 % T.H.D) RMS; 32 W (0.9 % T.H.D)
Output terminals: Front speakers; 6 ohms
Centre speaker; 4 ohms Surround speakers; 8 ohms Sub woofer; 6 ohms Headphones; 16-50 ohms (recommended; 32 ohms) Video out; 1 Vp-p (75 ohms)
Input terminals: Video/Auxiliary (audio signal) x 2;
500 mV/47 kohms
Compact disc player section
Type: Signal readout:
D/A converter: 1-bit D/A converter Frequency Frequency response: 20 - 20,000 Hz Dynamic range: 90 dB (1 kHz)
3-disc multi-play compact disc player Non-contact, 3-beam semi-conductor
laser pickup
Video CD section
Video output format: PAL/PAL60/NTSC
Tuner section
Frequency range: FM; 88-108 MHz
AM; 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)
CP-C881
Front speaker section
Type: 3-way type [13 cm (5-1/4") woofer,
5 cm (2") tweeter and super tweeter]
Maximum input power: 80 W Rated input power: 40 W Impedance: 6 ohms Dimensions: Width; 200 mm (7-7/8")
Height; 300 mm (11-13/16") Depth; 254 mm (10")
Weight: 2.9 kg (6.3 lbs.)/each
GBOXS0026AWM1
Center speaker section
Type: 10 cm (4") full-range speaker Maximum input power: 40 W Rated input power: 20 W Impedance: 4 ohms Dimensions: Width; 260 mm (10-1/4")
Height; 140 mm (5-1/2") Depth; 155 mm (6-1/8")
Weight: 0.9 kg (2.0 lbs.)
GBOXS0027AWM1
Surround speaker section
Type: 10 cm (4") full-range speaker Maximum input power: 20 W Rated input power: 10 W Impedance: 8 ohms Dimensions: Width; 170 mm (6-3/4")
Height; 88 mm (3-1/2") Depth; 170 mm (6-3/4")
Weight: 0.5 kg (1.0 lbs.)/each
CP-SW881
Sub woofer section
Type: 13 cm (5-1/4") full-range speaker Maximum input power: 80 W Rated input power: 40 W Impedance: 6 ohms Dimensions: Width; 200 mm (7-7/8")
Height; 300 mm (11-13/16") Depth; 310 mm (12-3/8")
ht: 3.4 kg (7.5 lbs.
Wei
Specifications for this model are subject to change without prior notice.
– 3 –
CD-PC1881V
(
CD-PC1881V
Front panel
1. Disc Number Selector Buttons
2. Disc Tray
3. Multi Indicator
4. Disc Skip Button
5. Open/Close Button
6. Dolby Pro Logic Indicator
7. Extra Bass Indicator
8. FM Stereo Mode Indicator
9. FM Stereo Indicator
10. (VCD/CD) Play Indicator
11. (VCD/CD) Pause Indicator
12. (VCD/CD) Repeat Indicator
13. (VCD/CD) Disc Number Indicators
14. (VCD/CD/TUNER) Memory Indicator
15. Timer Play Indicator
16. Timer Record Indicator
17. Spectrum Analyzer/Volume Level Indicator
18. (TAPE 2) Record Indicator
19. Sleep Indicator
NAMES OF PARTS
123 45
123 45
6
7 8
10
9
11
12
13
20. Timer Set Indicator
21. (VCD) Digest Button
22. (VCD) Book Mark Button
23. (VCD) Skip Previous Button
(CD) Track Down/Review Button (TUNER) Preset Down Button (TAPE 2) Rewind Button
24. (VCD) Skip Next Button
(CD) Track Up/Cue Button (TUNER) Preset Up Button (TAPE 2) Fast Forward Button
25. Bypass Button
26. Normal Button
27. Timer/Sleep Button
28. Clock Button
29. (VCD) Playback Control Auto/Off Button
30. (VCD/CD) Audio Mode Button
31. (VCD) On Screen Display On/Off Button
32. On/Stand-by Button
33. Equalizer Mode Selector Button
34. Dimmer Button
35. Phantom Button
36. Extra Bass/Demo Mode Button
37. Volume Control
38. Headphone Socket
39. Function Selector Button
40. (TAPE 2) Record Pause Button
41. Memory/Set Button
42. (VCD) Stop/Return
(CD/TAPE) Stop Button
43. (VCD) Play/Repeat/Select/Resume Button
(CD) Play/Repeat Button (TAPE) Play Button
44. Tuning and Time Up/Down Buttons
45. Sub Woofer Volume Control
17 18 19
20
212223 242526
27 28 29 30 31
32
3839 40 41 42 43 44 45
46 47
14 15
16
33 34
35 36
37
46. (TAPE 1) Cassette Compartment
TAPE 2) Cassette Compartment
47.
– 4 –
7891011
1
2
3 4
5 6
1 2
3 4
5
6
7
8
9
10
11
12
p
Rear panel
1. Video Output Socket
2. AC Power Lead
3. AM Aerial T erminal
4. Aerial Earth Terminal
5. FM 75 Ohms Aerial Terminal
6. Video/Auxiliary (Audio Signal) Input Sockets
7. AC Voltage Selector
8. Surround Speaker Terminals
9. Centre Speaker Terminals
10. Front Speaker Terminals
11. Sub Woofer Terminals
CP-C881
Front speaker
1. Super Tweeter
2. Tweeter
3. Woofer
4. Bass Reflex Duct
5. Speaker Wire
CD-PC1881V
GBOXS0026AWM1
Center speaker
6. Full-Range Speaker
7. Speaker Wire
GBOXS0027AWM1
Surround speaker
8. Full-Range Speaker
9. Speaker Wire
CP-SW881
Sub woofer
10. Woofer
11. Bass Reflex Duct
12. S
eaker Wire
– 5 –
CD-PC1881V
Remote control
1. Remote Control Transmitter LED
2. On/Stand-by Button
3. Surround Level Buttons
4. Centre Level Buttons
5. Dolby Pro Logic Button
6. Centre Mode Button
7. Test Tone Button
8. (VCD/CD) Direct Search Buttons
9. (VCD) On Screen Display On/Off Button
10. (VCD) PAL/NTSC Select Button
11. (VCD) Book Mark Button
12. (VCD) Digest/Time Search Button
13. (VCD/CD) Audio Mode Button
14. (VCD) VCD Auto/On Button
15. (VCD) Playback Control Auto/Off Button
16. (VCD/CD) Clear Button
17. (VCD/CD) Memory Button
18. (VCD/CD) Disc Skip Button
19. (VCD/CD) Random Button
20. (VCD/CD) Pause Button
21. (TAPE 2) Record Pause Button
22. (VCD) Skip/Previous Button (CD) Track Down/Review Button (TUNER) Preset Down Button (TAPE 2) Rewind Button
23. (VCD) Skip/Next Button (CD) Track Up/Cue Button (TUNER) Preset Up Button (TAPE 2) Fast Forward Button
24. (VCD) Stop/Return Button (CD/TAPE) Stop Button
25. (VCD) Play/Repeat/Select/Resume Button (CD) Play/Repeat Button (TAPE) Play Button
26. Function Selector Buttons
27. Extra Bass Button
28. Equalizer Mode Button
29. Balance Control Buttons
30. Volume Up/Down Buttons
10 11 12
26 27 28 29
3 4 5 6
8 9
12
7
13 14 15 16 17
1821 20
19 24 2522 23
30
– 6 –
OPERATION MANUAL
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
interfere with operation. Change the lighting or the direction
of the unit.
Keep the remote control away from moisture, excessive heat,
shock, and vibrations.
Remote control
0.2 m - 6 m
(8" - 20')
15
15
Reset the microcomputer under the following con-
ditions:
To erase all of the stored memory contents (clock and timer
settings, and tuner and CD presets).
If the display is not correct.
If the operation is not correct.
1
Press the ON/STAND-BY button to enter the stand-by mode.
2
Whilst pressing down the button and the button,
hold down the ON/STAND-BY button for at least 1 second.
Caution:
The operation explained above will erase all data stored in
memory including clock and timer settings, and tuner, video
CD and CD presets.
ON/
STAND-BY
RESETTING THE MICROCOMPUTER
SETTING THE CLOCK
(Main unit operation)
TUNING/
TIME
( )
MEMORY/
SET
CLOCK
ON/
STAND-BY
7
Press the MEMORY/SET button.
8
Press the TUNING/TIME ( or ) button to adjust the
minutes.
Press the TUNING/TIME ( or ) button once to advance
the time by 1 minute. Hold it down to change the time in 5
minute intervals.
The hour setting will not advance even if minutes advance
from “59” to “00”.
9
Press the MEMORY/SET button.
The clock starts operating from “0” seconds.
(Seconds are not displayed.)
And then the clock display will disappear a few seconds.
To see the time display:
Press the CLOCK button.
The time display will appear for about 5 seconds.
Note:
The clock display will flash on and off at the push of the
CLOCK button when the AC power supply is restored after
a power failure occurs or after the AC power lead is discon-
nected.
If this happens, follow the procedure below to change the
clock time.
To change the clock time:
Press the CLOCK button.
Within 5 seconds, press the MEMORY/SET button.➂Perform steps 6 - 9 above.
To change the time display mode:
Perform steps 1 - 2 in the section “RESETTING THE MI-
CROCOMPUTER”, .
Perform steps 1 - 9 above.
In this example, the clock is set for the 24-hour (0:00) system.
1
Press the ON/STAND-BY button to enter the stand-by mode.
2
Press the CLOCK button.
3
Within 5 seconds, press the MEMORY/SET button.
4
Press the TUNING/TIME ( or ) button to select the time
display mode.
AM 12:00AM 0:000:00
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 au-
tomatically to “PM”.
“0:00” The 24-hour display will appear.
(0:00 - 23:59)
“AM 0:00” The 12-hour display will appear.
(AM or PM 0:00 - 11:59)
“AM 12:00” The 12-hour display will appear.
(AM or PM 12:00 - 11:59)
Note that this can only be set when the unit is first installed
or it has been reset.
5
Press the MEMORY/SET button.
6
Press the TUNING/TIME ( or ) button to adjust the hour.
CD-PC1881V
– 7 –
CD-PC1881V
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 sufficient care on static electricity of integrated circuits and other circuits when servicing.
CD-PC1881V
STEP
10 Display PWB/ 1. Screw..................... (K1) x13 9-2
11 Tape Mechanism 1. Open the cassette holder. 9-2
12 Turntable 1. Screw ..................... (M1) x1 9-3
13 Disc Tray 1. Screw ..................... (N1) x2 9-3
14 CD Video PWB 1. Screw ..................... (P1) x1 9-4
15 CD Changer 1. Screw ..................... (Q1) x4 9-5
16 CD Mechanism 1. Screw ..................... (R1) x1 9-5
R EMOVAL PROCEDURE
1 Top Cabinet 1. Screw ..................... (A1) x4 8-1
2 Side Panel 1. Screw ..................... (B1) x4 8-1
(Left/Right) 2. Screw ..................... (B2) x2
3 CD Tray Cover/ 1. Turn on the power supply, 8-2
CD Player Unit open the disc tray, take out
4 Jack PWB 1. Screw ..................... (D1) x1 8-2
5 Rear Panel 1. Screw ..................... (E1) x2 8-2
6 Tuner PWB 1. Screw ..................... (F1) x1 8-2
7 Main PWB 1. Socket .................... (G1) x2 9-1
8 Power PWB 1. Screw ..................... (H1) x4 9-1
9 Front Panel 1. Screw ..................... (J1) x1 9-2
Switch PWB Headphones PWB 3.
Mechanism
the CD cover, and close. (Note 1) (Note 2)
2. Hook....................... (C1) x5
3. Hook....................... (C2) x2
4. Socket .................... (C3) x4
5. Screw ..................... (C4) x2
2. Screw ..................... (E2) x8
3. Screw ..................... (E3) x2
4. Socket .................... (E4) x1
2. Socket .................... (F2) x1
2. Flat Cable .............. (G2) x1
3. Flat Wire................. (G3) x1
4. Tip Wire.................. (G4) x1
5. Screw ..................... (G5) x1
6. Socket .................... (G6) x1
2. Screw ..................... (H2) x2
3. Socket .................... (H3) x4
4. PWB Holder ........... (H4) x4
2. Screw ..................... (J2) x2
2.
Bracket Support ..... (K2) x1
Knob ....................... (K3) x1
2. Screw...................... (L1) x6
3. Socket .................... (L2) x1
2. Cover ..................... (M2) x1
2. Guide ..................... (N2) x2
2. Socket .................... (P2) x4
FIGURE
Top Cabinet
(A1)x2 ø3x12mm
Side Panel (Right)
(B1)x2 ø3x8mm
(B2)x2 ø3x10mm
Rear Panel
Side Panel (Left)
Front Panel
(A1)x2 ø3x12mm
(B1)x2 ø3x8mm
Figure 8-1
Hook (C1) x5
(F2)x1
Main PWB
Tuner PWB
Front Panel
(C4) x1 ø3x10mm
(F1) x1 ø3x10mm
CD Video PWB
CD Player Unit
Jack PWB
Rear Panel
(D1) x1 ø3x10mm
(C4) x1 ø3x10mm
(E4)x1
(E2)x8 ø3x10mm
(C3) x4
(C2) x1
Pull
(E3)x2 ø3x10mm
DiscTray
1
(E1)x2 ø3x10mm
Figure 8-2
LOCK LEVER
Figure 8-3
Note 1:
How to open the changer manually. (Fig. 8-3)
1. Change, 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.
Note 2:
1. After removing the connector for the optical pickup from the
connector, wrap the conductive aluminium foil around the front end of connector to protect the optical pickup from electrostatic damage.
CD Tray Cover
1
2
(C2) x1
– 8 –
CD-PC1881V
(N1) x1 ø3 x10mm
(N1) x1 ø3 x10mm
(M1) x1 ø3 x10mm
Turntable
Disc Tray
(M2) x1
(N2) x1
(N2) x1
CD Player Unit
Washer
(Q1) x4 ø3 x12mm
(R1) x1
ø2.6 x10mm
CD Changer Mechanism
CD Mechanism
Shift Lever
CD Player Base
1 1
Push
2
Pull
Power PWB
(H1)x4 ø3x10mm
(K1)x2 ø3x10mm
(K1)x10 ø3x10mm
Main Chassis
(K1)x1 ø3x10mm
Display PWB
(G1)x2
(H4)x4
Push
POWER PWB
Switch PWB
(L1)x6 ø3x10mm
(G2)x1
(H3)x2
Main PWB
(J1)x1 ø3x10mm
(H3)x2
Figure 9-1
Figure 9-2
Front Panel
(H2)x2 ø3x6mm
(L2)x1
(G6)x1
(J2)x2 ø3x8mm
(G3)x1
Headphoens PWB
(G4)x1
(G5)x1 ø3x10mm
(K3)x1
Display PWB
Front Panel
(K2)x1
Headphones PWB
Cassette Holder (Left/Right)
Tape Mechanism
Open
(P2) x2
(P2) x2
Figure 9-3
(P1) x1 ø3 x10mm
CD Video PWB
CD Player Unit
Figure 9-4
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 9-5
– 9 –
CD-PC1881V
CP-C881
STEP REMOVAL
1 Front Speaker 1. Front Panel ............ (A1) x1 10-1
2. Tip .......................... (A2) x2
3. Screw ..................... (A3) x2
4. Screw ..................... (A4) x2
5. Screw ..................... (A5) x4
PROCEDURE
FIGURE
Super
Tweeter
Front Panel
(A1)x1
Speaker Box
(A3)x2 ø3x10mm
(A2)x2
(A4)x2 ø3x10mm
(A5)x4 ø4x14mm
Drive should be pried away from Speaker Box.
Figure 10-1
Tweeter
Woofer
Screw Driver
CP-SW881
STEP
REMOVAL PROCEDURE FIGURE
1 Sub woofer 1. Net.......................... (A1) x1 10-2
2. Screw ..................... (A2) x4
Note:
The surround speakers and center speaker can be easily disassembled. Therefore the disassembling method is not described. For details refer to the disassembling drawing in the Parts Guide.
(A1)x1
(A2)x4
ø4x14mm
Screw
driver
Drive should be pried
away from Speaker Box.
Direction of handle
Woofer
Speaker
Box
Figure 10-2
– 10 –
REMOVING AND REINSTALLING THE MAIN PARTS
(B1) x2 ø2.6 x6mm
Shaft (B2) x1
Stop Washer (B3) x1
Gear (B4) x1
CD Mechanism
Pickup
CD MECHANISM SECTION
Perform steps 1, 2, 3 and 14-16 of the disassembly method to remove the CD mechanism.
How to remove the T/T up/down loading motor (See Fig. 11-1)
1. Remove the screws (A1) x 2 pcs., to remove the T/T up/ down loading motor.
CD-PC1881V
T/T Up/Down Loading Motor
Motor PWB
(A1) x2 ø2.6 x5mm
Figure 11-1
How to remove the pickup (See Fig. 11-2)
1. Remove the screws (B1) x 2 pcs., to remove the shaft (B2)x 1 pc.
2. Remove the stop washer (B3) x 1 pc., to remove the gear (B4)x 1 pc.
3. Remove the pickup.
Note
After removing the connector for the optical pickup from the connector, wrap the conductive aluminium foil around the front end of connector to protect the optical pickup from electrostatic damage.
Figure 11-2
– 11 –
CD-PC1881V
ADJUSTMENT
MECHANISM SECTION
Driving Force Check
Torque Meter
Play: TW-2412 Tape 1: Over 80 g
Torque Check
Torque Meter
Tape 1
Play: TW-2111 30 to 60 g. cm 30 to 60 g.cm Fast forward: TW-2231 60 to 120 g.cm Rewind: TW-2231 60 to 120 g.cm
Tape Speed
Test Tape
Normal MTT-111 Variable 3,000 ± Speaker speed Resistor in 30 Hz terminal
Adjusting
Point
motor. (Load (MM1) resistance:
TAPE MECHANISM
Variable Resistor in motor
Figure 12-1
Specified Value
Tape 2: Over 80 g
Specified Value
Specified
Value
MM 1 Motor
Tape 2
Instrument
Connection
8 ohms)
TUNER SECTION
fL: Low-range frequency fH: High-renge frequency
AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
Test Stage 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 (fH): T302 *1
Frequency
Display
*1. Input: Antenna, Output: TP302 *2. Input: Antenna, Output: TP301
FM Notes:
1: Description of the "FM IF Adjustment" is not carried on this
Manual. It is because the IF coil in the FM front end section has been best adjusted in the factory so that its further adjustment is not needed at the field. When replacing the FM front end assembly, no adjustment is needed either.
2: The parts in the FM front end section are prepared in a
complete unit, so you can't obtain each part individually.
FM Mute Level
Signal generator: 1 kHz, 40 kHz dev., FM modulated
Frequency
98.00 MHz 98.00 MHz VR351 Input: Antenna (25 dBµV) Output: Speaker
Frequency
Display
TUNER PWB
Adjusting
Parts
Setting/
Adjusting
Parts
Connection
Terminal
Instrument
Connection
Instrument
R336
FE301
AM TRACKING fH
TP301
SO301 ANTENNA TERMINAL
T302
TP302
R357
IC303
AM IF
T351
FM MUTE LEVEL
VR351
T306
AM BAND COVERAGE fL
Figure 12-2 ADJUSTMENT POINTS
CD ERROR CODE DESCRIPTION
When a malfunction occurs during CD operation, an error code will be displayed to identify the function in CD operation which failed.
Error State Code 0001 Cannot detect pickup-in SW 0101 Tray close operation error 0105 Tray close operation error 0201 Tray open operation error 0203 Tray open operation error 0304 Disc skip operation error 0305 Disc skip operation error
0307 Disc skip operation error
– 12 –
TEST MODE
1 2 3
2
1
10ms
0.50 V IC1 20 FE
10ms
0.50 V IC1 7 TE
Enlarged View
TRACKING OFF-SET ADJUST
Setting the test mode
Any one of test mode can be set by pressing several keys as follows. <CD> + < > + <POWER> TEST: CD operation test
TEST mode
Function — CD test mode
Setting of TEST mode Indication of CD TST mode (Fig. 13-1) OPEN/CLOSE operation is manual operation. The pickup can be moved by using the (
<MEMORY> LASER ON
<MEMORY> Tracking on the spot. SERVO OFF PLAY
) or ( ) key.
<MEMORY>
Tracking on the spot. SERVO ON PLAY
IL is not performed.
CD-PC1881V
<STOP>
STOP
<PLAY> key input
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
Press <STOP> key.
Stop
<Disc Number 3> key: Track 15
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
Figure 13-1
CD SECTION
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. 13-2)
2. Tracking offset (Fig. 13-3)
3. E/F balance (tracking error balance) (Fig. 13-4)
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.
0.1s
0.50 V IC1 20 FE
FOCUS OFF-SET ADJUST
0.1s
0.50 V IC1 7 TE
TRACKING OFF-SET ADJUST
1 2
Figure 13-2
200 ms 1V/diV IC 1 15
200 ms 1V/diV IC 1 7
TO
TE
TRACKING/ ERROR BARANCE
1
ADJUST
2
Figure 13-4
– 13 –
Figure 13-3
CD-PC1881V
EXPLANATION OF DOLBY SURROUND PRO LOGIC AND EVALUATION METHOD
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.
• State of element output and terminal output in specific mode
State of set Dolby Pro Logic Dolby Pro Logic On mode Output point Bypass mode Normal mode Phantom mode
IC501 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 IC501 9pin C-out No output Output enabled state No output IC501 10pin S-out No output Output enabled state Output enabled state SP OUT L-ch Output enabled state Output enabled state Output enabled state (SO901) R-ch Output enabled state Output enabled state Output enabled state SP OUT C-ch No output in MUTE (Q404) state Output enabled state No output in MUTE (Q404) state (SO901) SP OUT S-ch No output in MUTE (Q403) state Output enabled state Output enabled state (SO901)
Test tone output
• Pro Logic ON Normal mode Press the remote control TEST TONE button. Output of only L-chOutput 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. TESTL-chC-ch
S-ch R-ch
• Pro Logic ON Phantom mode Press the remote control TEST TONE button. Output of only L-chOutput 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
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
SP out L-ch Almost no output (only omitting component) (SO901) R-ch Almost no output (only omitting component)
(SO901) SP out C-ch (SO901) SP out S-ch
Input signal is output. Almost no output (only omitting component)
• 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
Output point Phantom mode
SP out L-ch Input signal is output. (SO901) R-ch Input signal is output.
(SO901) SP out C-ch SP cut, no output (SO901) SP out S-ch
Almost no output (only omitting component)
(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 (SO901) R-ch
(SO901) SP out C-ch (SO901) SP out S-ch Input signal is output.
Output point Phantom mode
SP out L-ch (SO901) R-ch
(SO901) SP out C-ch SP cut, no output (SO901) SP out S-ch Input signal is output.
Almost no output (only omitting component) Almost no output (only omitting component)
Almost no output (only omitting component)
Almost no output (only omitting component) Almost no output (only omitting component)
• 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.
– 14 –
+5V
X1
16.93MHz
TO MAIN SECTION
1726 50 51
LVSS
XVSS
TEST3
TEST4
54
XVDD
47
LVDD
27
VDD
AVDD
6
52
XOUT
53
XIN
AVSS
VSS
1012
4
2
5
4
6
LR
3
IC4
543
5649
LR
RCHN
LCHN
+B1
CNP11
+B5
1
7 1
BA4558F
OPE AMP.
IC2
LC78631E
SERVO/SIGNAL
CONTROL
TEST2
TEST1
EFMO
EFMI
CLV+
V/P
HFL20TES23TOFF24TGL28JP+29JP–
~
15
1113
16
19
9
P0/DFCK
P1/DFIN
Q51
39 38
45
~
41
72
~
67 80
78
RES. CQCK. COIN
SQOUT. RWC. WRQ
77 64
CNS10
CNP10
SW2
10
GND (D)
10
9
9
MECHA UP
SW3
DISC NUMBER
7
8
MECHA UP
GND (D)
DISK NO.
7
8
M3
T/T UP/DOWN
SW1
OPEN/CLOSE
M
5
3
6
4
OPEN/CLOSE
GND (D)M–M+
5
3
6
4
LOADING MOTOR
SOLM2
SOLENOID
TO MAIN SECTION
2
1
SOL-
SOL+
2
1
JKV1
VIDEO OUT
6
ICV4
VIDEO
OPERATION
AMP.
NJM2267M
1
XV2
27MHz
CD-PC1881V
+B1
QV4
206
1
VDD
36
~
39
86 68
~
65 14
13 35 32
33 95 97
~
99
DQ12 DQ15
DQ0
~
2
~
38
MA8
VOUT1 MD12
MD15 X2
X1 AUDO AUBCK
AULRCK CDC2PO CDLRCK
CDI
1
ICV3
DRAM
SDM4260C
DQ3
DQ4
DQ7
WE
RASA0A3A4A8
~
7
5
42
15
16
101314
~
45
54
484952
MA4
MA3
MA0
MWE
MRAS
ICV2
MPEG DECOEDER
D61012GC
VDD,CKSEL,HSELX, HSELAAVDD,
~
~
25
1723 36
~
~
MCAS
4451
19
56
~
22
26
~
58
62
MD5
MD4
MD0
63 75 83 84 92
21 27 35 40
UCAS
28
LCAS
29
DQ8
DQ11
~
31
34
~
70
53
73
57
6
MD8
MD11
MCAS
11
64
12
69
18
74
26
76 91
30
94
37
96
43
100
50
HD7
2
~
HD4
5
HD3
7
~
HD0
10
+5V
LASER
DRIVER
+B1
Q52
1213 11
CD-LD M–
CD-LD M+
MO SPEED
15
PWR_MPEG
40
X2
MPEG CONTROLLER
X1
41
18
MDI
19
MDO
20
MCK
22
MBUSY
CD SOL
6 7 9
ICV1
IX0313AW
~
141617 33
25
+B1
CNPV2
QV1
QV2
QV3
XV1
4.19MHz
2
4
1
3
~
32 404344
22
AGND
JP–
CV+
64
VCC1
IC1
LA9241M
SERVO AMP.
Q1
62
LDO
FIN2
FIN1EF
2
1
53
CE
SL1
SLC
DAT
CL
DRF
SL+ SL–
SLD
SP
SPO
FD TO
3
4
CL, DAT, SELIAL CONTROL/CE
52 51
54
SL+. SL–. DRF
31 30
29 23 27 16 15
25 20 17
2 1
SPINDLE
M63001FP
TRACKING/
SPIN/SLED
23
6
M1
MOTOR
+B1
18244020
IC3
FOCUS/
DRIVER
7
45
+B5
15
3839284142 37 36
1626
35 29
22 21 14
8
27
PU-IN SW
~~
~
64
HD7
~
45
3942~50
57
HD0
M
TO MAIN SECTION
PICKUP UNIT
FOCUS COIL
TRACKING COIL
M2
SLED
MOTOR
M
PICKUP IN
SW4
Figure 15 BLOCK DIAGRAM (1/3)
– 15 –
CD-PC1881V
M
7
Q Q
FM 75 ohms
GND
AM
SO301
ANTENNA
TERMINAL
FE301
FM FRONT END
2867 3 4
F OUT
AM RF
AM ANTENNA
T302
VD301
OSC
T306
VT
AM OSC.
VD301
SWM3
FOOL PROOF
MUTING
Q353 Q354
SWM4
F.A.S
SOLM1
SOLENOID
SWM5
CAM
VOLUME
JOG
VR702
M
MM1
TAPE MOTOR
X351
CF352
IN
IC303
LA1832
STEREO
AM RF IN
FM IN
1116
4
3 6
DI
CE
FM DET CF351
GND
13
67
SD
MONO/ST
FM MONO/ST
10
5
CL
DO
Q371
456kHz
+B4
17
VCC
IF
OUT
10
PHASE
VOLTAGE REGURATER
+B4
IF IN
1213
21
Q361 MPX
17
18 16
FM/AM
MPX
OUT
IN
14
11
+5V
15
12
RL
MPX VCO CUT
TUNER MUTE
FM +B
FM IF
CF302
1 3
2
FM MUTE LEVEL
FMOSC
+B4
Q360
VOLTAGE REGULATOR
FM
FM IF IN
VR351
7
1
5
+B4
AM IF
T351
24
1589
OUT
FM/AM IF MPX.
4.5MHz
1
X IN
AM OSC
24
OUT
X352
21
23
22
IN
AFC
INAM
2220
15
X OUT
IC302
LC72131
PLL (TUNER)
FROM CD VIDEO SECTION CNP11
TAPE 1
PLAYBACK HEAD
L-CH R-CH
L-CH
R-CH
RECORD/ PLAYBACK HEAD
ERASE HEAD
P.B
TAPE 2
REC
AC BIAS
CNS11
1 2 3
SWITCHING
Q103~Q106
JK401
VIDEO IN
L-CH
VIDEO2
R-CH
L-CH
VIDEO1
R-CH
PLAYBACK AND RECORD/
POP REDUCE
L REC R REC
AN7345K
PLAYBACK AMP.
L(T1)
1
24
R(T1)
L(T2)
2
23
R(T2)
L NF
3 4
R NF
T1/T2
6
REC
9
16 14
REF
12
NOR/ HIGH
15 19
SWITCHING SWITCHING
Q107 Q108
Q109
SWITCHING
BIAS OCS
Q128 L104
IC101
T1/T2
Q111
P.B.
H/N
13
4
21
5
20
7
18
8
17
10
Q110
L R
L NF R NF ALC
+B4
PB
L R REC
SWITCHING
Q124
VIDEO2 VIDEO1 TAPE TUNER
CD
34 38 35 37 36
23 24 25
L R L
R L R L R L R
IC501 LV1035M DOLBY PRO LOGIC DECORD
CLDICE
51 61 52 60 53 59 54 58 55 57
L
IC401
LC75396N
AUDIO PROCESSOR
63
44
26
49
R
45
33 32
X501 8MHz
BAIS Q126
56
Q121 Q122
MUTING
22
9
+B4
20 28
R
17 31
L
30 18
REC
Q405
ZD801
T1/T2
12
CENTER IN
9
13
IC951
LA4451
POWER A
11
REAR IN
4
Q903
BAIS
Figure 16 BLOCK DIAGRAM (2/3)
– 16 –
M
MM1
PE MOTOR
Q702 Q703
~~~
15 2516
1 2 3
4
FL701
FL DISPLAY
28
26
CD-PC1881V
~
36
37 3839
29
Q705 Q706 Q707
ZD801
+B7
+B7
1
3
RX701
2
+B7 REMOTE SENSOR
KEY SW701~SW721 SW722~SW725 SW728~SW733
SUB WOOFER VOLUME
VR701
Q401 Q402
+B3
+B4 +B5 +B8
+B2
50
H/P
49
FPA T1 FAS
48 47
CAM SW
46
VDD
45
T MOT
44
T SOL 43 42
U/D SW
DNO SW
41 40
REMOCON
39
SYS STOP
38
O/C SW
37 36
PUIN SW 35 34
AVDD 33 32 31
Q403 Q404
+12V(ANALOG) +12V(MOTOR) +7V(CD)
+5.6V
535251
MOD
33 32 31
SPEANA3
SPEANA2
SPEANA1
T2 RUN
282930
+B5
PHM1
IC471
KIA4558P
OPE. AMP.
VOLTAGE
REGULATOR
13
IC806
CONSTANT VOLTAGE
2
SPRLY
CMUTE
SMUTE
POWER
SRMUTE
KEY JOG A
KEY JOG B
535251
54
IC701
T BIAS
T T1T2
IX0340AW
REC/PLAY
AC RLY CON
SYSTEM CONTROL
MICROCOMPUTER
KEY IN1 KET IN2 KEY IN3
SBUSY
CD DSP COIN
SQOUT
CD DSP CQCK
CD DSPRES
FRF
SLD+
SLD-
37
Q904
18
12 16
IC902 POWER AMP.
STK40724
5
+B7
3
–B
4
IC650 IC651
KIA4558P
OPE AMP.
4
L-IN
R-IN
D802
VOLTAGE
REGULATOR
KIA7812P
13
IC804
VOLTAGE
2
REGULATOR
KIA7806P
13
IC805
2
AN78L05
REGULATOR
REGULATOR
VOLTAGE
Q801
MBUSY
S22/DIST4
CD DSP WRQ
VDD
XL701
4.19MHz
Q601,Q602 Q603, Q604
7
10
7170696867666564636261 80797877
S21/DIST3
S20/DIST2
S19/DIST1
S18/DIST0
RESET
101112131415161718192021222324252627
20
1
+B1
D803~D806
D807 ~D809
737260595857565554
S16
S15
S17
99
100
CD DSP RWC
8
9
6
7
Q704
FRONT
L-OUT
9 8
R-OUT
D801
767574
S14
81 82 83 84
G2 G1
CLK
S13
S12
S9 S8 S7 S6
4 3 2 1
5
S11
DODICE
VLOAD
S5 S4
S3 S2
S1 G11 G10
G9
G8
G7
G6
G5
G4
G3
1
3
81
S10
82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99
100
VDD
IC704
KIA7042AP
2
IC601
3
NJM4560D
5
OPE AMP.
F802
T5A L 250V
F803
T5A L 250V
F804 T3.15A L 250V
F805
T1.6A L 250V
RESET
4
MAIN POWER
TRANSFORMER
PT801
1 7
T.F
TO CD VIDEO SECTION
TO CD VIDEO SECTION
230-240V
220V
127V
110V
Q905
RL902
SW801 VOLTAGE SELECTOR
RL801
+B5
Q907
Q906
2 3 4 5 6 7
UNSWITCH +B7
MEMORY BACK UP
RL901
F902 T3.15A L 250V
F901 T3.15A L 250V
18
15 14
IC702
13
BU2092F
EXPANDER
12
INPUT/OUTPUT
11 10
+B
+B4
M902
M
FAN MOTOR
+B4
M901
M
FAN MOTOR
JK601 HEADPHONES
SO901 SPEAKER TERMINALS
F903 T3.15A L 250V
AC POWER SUPPLY CORD
SUB WOOFER
FRONT SPEAKER
CENTER SPEAKER
SURROUND SPEAKER
REAR IN
CENTER IN
9
13
IC951
LA4451
POWER AMP.
4
11
7
1 6
+B7
+5V
+B6
CENTER OUT REAR OUT
UNSWITCH
AN78L05
CONSTANT VOLTAGE
REGULATOR
13
IC803
2
Figure 17 BLOCK DIAGRAM (3/3)
Q802
VOLTAGE
REGULATOR
– 17 –
D811~D814
PT802
SUB POWER
TRANSFORMER
AC 110/127/220/230-240V 50/60Hz
CD-PC1881V
4 4
/
C
4 M
C
M
0 C
0
4
2
C
4
0 S
A
B
TO TUNER PWB
P21 12-A
CNP303
CNS303
A_12V
TUN_L
A_GND
TUN_R
TO CD VIDEO PWB
P27 12-C
CNP11
TO DECK SECTION
P20 2-A
11 12 13 14 15 16 17 18 19 20 21
123456789
DI
CL
CE
DO
D_GND
+B
T1/T2
BIAS
A_12V
REC_MUTE
D_GND
M_GND
REC_R
A_GND
REC_L
TAPE_R
+B
TAPE_L
R372
1K
R371 1K
+B
123456
123456
7.3V
L-CH
R-CH
A_GND
D_GND
CNS11 BI401
M_12V
+B
C
D
TO DISPLAY PWB
E
FFC701
25
CNP701
P22 1-E
CNP502
1
POWER
SR_MUTE
C MUTE S_MUTE
T1/T2
TAPE BIAS
REC/PLAY
H/PSW
TUN SM
D_GND
D_GND SPEANA3 SPEANA2
SPEANA1
M_+12V
CLK
Q11 ENA
A_GND
SUB_VOL_IN
SUB_VOL_OUT
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17
R522 1K
18
CE
R521 1K
19
DI
DO
20 21 22 23 24 25
C545 220P
+B
C510 0.47/50 C512 4.7/50 C511 0.47/50 C513 4.7/50 C516 0.15/50 C518 3.3/50 C520 0.15/50 C522 0.15/50 C525 3.3/50 C526 0.15/50 C528 4.7/50 C529 0.47/50 C530 4.7/50 C533 0.47/50
+B
R516 1K R523 1K R517 1K
C501
0.1
(ML)
49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64
C543
0.1(ML)
C509
0.1(ML)
C502 1/50
L_BPF2
L_BPF1
DC_OUT3 R_RECT
DC_OUT4 L_RECT VLR_TH VLR_1 VLR_2 VCS_2
DOLBY PRO LOGIC
VCS_1 VCS_TH L+R_RECT DC_OUT2 L-R_RECT DC_OUT1
R_BPF1
R_BPF2
123456789
C534 0.1(ML)
C535 10/50
R513
3.3K
R501 100K
R502 100K
C505 0.47/50
C504 47/25
C503 1/50
GND
LT_IN
RT_IN
DC_OUT
C_MODE
49
L_BPF3
IC501
LV1035M
DECORDER
64
R_BPF3
L_DC_OUT
R_DC_OUT
C_DC_OUT
S_DC_OUT
C536 10/50
C538 10/50
C537 10/50
R514
330
R518 1K
R519 1K
C507 0.047
C508 680P
C506 0.022
OSC
NS_BPF1
NS_BPF2
S_OUT
C_OUT
VCC
VREF
10 11 12 13 14 15 16
C539
220/16
C540
C544
220/16
R511
C546
0.022
R515
3.3K
CLK
R_OUT
10/50
1K
C549 100P
C551 100P
R520 22K
C550 100P
DATA
DATA
ENABLE
L_IN
AC_GND
L_OUT
C542 220/16
33343536373839404142434445464748
CLK
VSS
OSC OSC VDD
DC_OUT DC_OUT
L_OUT R_OUT S_OUT D_GND
IREF
DET
VCC
S_IN
R_IN
32 31 30 29
A/D
C515 0.0033(ML)
28
NS
27
D/A
C519 0.47/50
26 25 24
C524 10/50
23
C527 10/50
22 21 20 19 18 17
NC
R510 18K
X501 8MHz
R504
R503
1M
1K
C541 220/16
C514 0.082(ML)
C517 0.082(ML)
C521 0.33/50 C523 10/50
R508 39K C531 2.2/50
C547
0.022
R505 4.7K
R506 4.7K R507 1K R509 4.7K R512 4.7K C532 220/16 C563 0.022
C
D515
1N4004S
D516
1N4004S
+B
0.2
0.18( C
0.068(
0.2
0.027(
0.
0.00 C
1
+B
F
G
MAIN PWB-A1(1/2)
H
• NOTES ON SCHEMATIC DIAGRAM can be found on page 38.
1
23456
Figure 18 SCHEMATIC DIAGRAM (1/12)
– 18 –
+B
R443 22K
C436 22/25
R442 22K
C437 22/25
D4
DS1S
0V
0V 2
3
4V
1
Q405 KRC10
7
8 9 10 11 12
+
B
CNS11 BI401
CD-PC1881V
FM SIGNAL PLAYBACK SIGNAL
RECORD SIGNAL CD SIGNAL
R625
R622
L-CH
VIDEO_1
IN
R-CH
JK401 VIDEO IN
L-CH
VIDEO_2
IN
R-CH
JK601
HEADPHONES
R
L
GND
GND
H/P SW
C621
HEADPHONES PWB-A4
FW601
5
1
22
2.7K
5 4 3 2 1
CNP601
0.001
L601 100µH
R620
27
R619
27
330
330
R449
R450
C448
2.2/50 R422
2.7K
C447
2.2/50
C449 0.047(ML)
C453 0.047(ML)
C451 0.047(ML)
C455 0.047(ML)
R415 1K
R413 1K
R411 1K
R409 1K
L4
L5
CIN
LRCOM
COUT
LVREF
C427 0.047(ML)
C425 10/50
C429
2.2/50
C431 47/25
Q404 KTC3199 GR
0.7V
R448
330
0.001
R438
2.2K
C442
0.001
REAR_OUT
FRONT_Rch
FRONT_Lch
A_GND
R421
2.7K
C445
49505152535455565758596061626364
LTIN
LSELO
LINVIN1
LF1C1 LF1C2 LF1C3 LF2C1 LF2C2 LF2C3 LF3C1 LF3C2 LF3C3 LF4C1 LF4C2 LF4C3
LF5
LTOUT
LFIN
LFCOM
LFOUT
C433 2.2/50
R435 22K
0V
0.7V
C441
–B
–15V
C423
0V
100P
+B
R437
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
10/50
2.2K
R419 33K
R424 220K
R425
220K
R433 10K
Q403 KTC3199 GR
0.047(ML)
C419 0.0047(ML)
C421
1/50
330
R447
C446
R420
100P
33K
C444
1/50
C443
1/50
C402
0.047(ML)
C404
0.082(ML) 1 2
C406
3
0.22/50 C408
C410
C412
0.22/50 C414
C416
0.015
C418
0.0022 C420
C422
1/50
C424
10/50
R442 22K
C438 22/25
D402
4 5 6 7 8 9
10 11 12 13 14 15 16
R441 22K
D403
DS1SS133
R444 10K
CNP501
0.18(ML)
0.068(ML)
0.027(ML)
0.0047(ML)
B
R443 22K
C436 22/25
C437 22/25
DS1SS133
V
0V
2
3
4V
1
Q405 KRC104 M
C450 0.047(ML)
R410 1K
R5
RTIN
RF1C1
RINVIN1
RF1C2 RF1C3 RF2C1 RF2C2 RF2C3 RF3C1 RF3C2 RF3C3
AUDIO PROCESSOR
RF4C1 RF4C2 RF4C3 RF5 RTOUT RFIN
RFCOM
RROUT
RRCOM
RRIN
RFOUT
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
C428
0.047(ML) C426
10/50
C430
2.2/50
C434
2.2/50
R436 22K
+B
+B
R430 47K R432 47K R434 2.2K
Q402
KTC3199 GR
0V
0V
0V
C440
0.001
330
R446
R440
2.2K
+12V (M)
M_GND
D_GND
+12V (A)
123456789
C458 0.047(ML)
C452 0.047(ML)
C456 0.047(ML)
C454 0.047(ML)
R418 1K
R412 1K
R416 1K
R414 1K
R4R3R2
R1
VDD
IC401
LC75396N
CLDICE
VREF
RVREF
C435
47/25
R427 1K
R426 1K
C432
47/25
R429 47K
R431 47K
Q401
KTC3199 GR
0V
0V
R445
C439
0.001
2.2K
R439
7.3V POWER
CD_GND
A_GND
SUB_WOOF
(CD)
CNP803
TO POWER PWB
P24 1-E
C457 0.047(ML)
R417 1K
L1L2L3
VSS
R428 1K
330
CENTER_OUT
10 11 12 13 14 15
D401
DS1SS133
C460
0.022
C459 100/16
C401
C403
0.082(ML)
C405
0.22/50 C407
0.18(ML) C409
0.068(ML) C411
0.22/50 C415
0.015 C413
0.027(ML)
C417
0.0022(ML)
220K
R423
R403
C461 390P
C462 390P
R471 220K
R472 220K
C463 390P
C464 390P
C475 47/25
C474
0.15
(ML)
R477
27K
R405
R623 R607
C627
22/50
R401 27K
R402
27K
27K
R406
27K
C471
0.047 (ML)
R476
R478 6.8K
22K
2.2K C615
0.001 C616
0.001
R624
22K
R651 10K
+B
R484
100K
27K
C478
0.082 (ML)
KTC3199 GR
R608
2.2K KTC3199 GR
C651 270P
R652
33K R654
68K
R653 12K
R655
56K
R656 470K
R657
15K
100K
R473
C476
0.15 (ML)
+B
Q601
Q602
C653
0.0027
D651 DS1SS133
C655
0.0068
C661 0.022 R661 270K
C662
0.022
C472 100P
R479 12K
47/25
C477 100P
R480
1.5K C479 10/50
R603
2.2K
R658 390K
C657 270P
C659
0.0027
C656
0.0068
R474
15K
R475
3.9K
C473
R604
2.2K
R483 100K
IC601 NJM4560D OPE AMP.
R605
22K
C617
0.001 C618
0.001
R606
22K
KTC3199 GR
IC650
KIA4558P
R660
2.2M
R666
–B
2 3
5 6
R662 220K
R664 220K
390K
R668
2.2M
R659 560K
R627
Q604
100
C601
0.047
KTC3199 GR
8
1
IC471
7
4
C480
47/25
R601
(ML)
2.2K
R609 100K
Q603
C602
0.047 (ML)
R610
R602
2.2K
2 3
OPE AMP.
5 6
IC651
KIA4558P
2 3
OPE AMP.
5 6
R663 330 R670 330
IC471
KIA4558P
OPE AMP.
R481
2.2/50
1K
C481
0.022
R614 100K
C607 47/25
C605
100P
R611 560 C603
47/25 C604 47/25 R612
100K
560
C606 100P
4 1
8 7
4 1
8 7
C663
C482
R482 100K
+B
R613 100K
2 3
5 6
D652 DS1SS133
C666
2.2/50 D653 DS1SS133
C665
2.2/50
D654
DS1SS133
C664
2.2/50
0.022
ZD651
DZ6.2BSC
C465
0.001
C609 100P
8
IC601
4
R618
12K
C610 100P
1
7
C667
0.001
R617
R616
C484
1K
1K
0.022
12K
R615
C611 10/50
C612 10/50
C613
SPEANA3
R672 100K
SPEANA2 R665
100K
SPEANA1
R674 100K
220/16
C614
0.022
R621
2.7K
R626
22
1.8K R404
1.8K
R407
1.8K
R408
1.8K
+B
+B
+B
+B
Figure 19 SCHEMATIC DIAGRAM (2/12)
– 19 –
CD-PC1881V
TO MAIN SECTION
P18 3-A
11
20
A
T1/T2
TAPE_R
B
C
D
+B
R174
150
(1/2W)
E
C153 100/16
19
13 18
REC_L
REC_R
REC_MUTE
R181
Q121
R154
10K
220K
R182
21 12
BIAS
TAPE_L
+B
220K
0V
0V
0.7V R153
10K
KTC3199 GR
0.7V
Q122
0V
0V
16
14 17
A_12V
D_GND
+B
D101
D102
DS1SS133
R146
10K
C140
0.0033
R142
KTC3199 GR
56
R136
2.7K
R132
18K
C120
560P C118
0.033 R120
56
15
A_GND
M_GND
DS1SS133
C147
0.022 C145
22/25
C142
1/50
C136
0.068
R140
560
C132
0.001
R134
68K
R126
5.6K R124
3.9K R122 100K
C116 47/25
+B
R158
C146
220/16
R138
6.8K
C114 330P
C112 330P
R118
1K
MECHANISM
CHASSIS
KRC104 M
11.7V
220
C134 22/25
NC
C122 1/50
Q126
0V 11.6V
R162 47K
11.6V
KTA1266 GR
Vcc
RIPPLE
14
Nor/CrO2
15
16
17
18
19
20
21
22
23
24
C652
0.01 BOTTOM
CHASSIS
0V
1
2
3
R164
4.7K
0V
Q124
GND
1213
11
ALC
NC
10
ALC
9
56K
C133
– ++
22/25
8
7
HICH=CHROME
6
5
NC
4
112K
112K 56K
+
+
HICH=T1
3 2 1
R167 100K
R160
150
(1/2W)
SWITCHING
C113 330P
R166
47K
C141 1/50
C139
0.0033
R141
56
R139
C131
0.001
R137
6.8K
C127
0.022
C121 1/50
R123
3.9K
C115
R121
47/25
100K
C111 330P
IC101
R117
AN7345K
1K
PLAYBACK AND
RECORD/
MAIN PWB-A1(2/2)
C152 47/25
R168 12
C150
C137
0.001
R131
18K
560P
0.033
R111
10K
L104
330µH
C151
0.027 (ML)
560
R135
C128
3.3/50
R125
5.6K
0V
0V
KTC3203 Y
R145 10K
C135
0.068
2.7K
R119
56
0V
Q128
0.0039(ML)
C119
C117
PLAYBACK AMP.
C108
3.4V
3.4V
3
Q110
KRC104 M
2
F
G
0V
R114
10K
C109
0.047
Q103-Q111:SWITCHING
1
1
0V
0V
R115
4.7K
10K
R113
9.3V
Q109 KTA1266 GR
3
2
8.6V
Q111
KRC104 M
R112
9.3V
C102
0.001
CNP101 CNS101
10K
R102
TAPE1_R
1K
A_GND
TAPE1_L
2
1
R101
2SC2389 SE
C101
0.001
3
1K
0V
Q104
R108
47K
R104
C106 180P
CNP102 CNS102
0.001 0V
2.2K
0V
0.7V 0V
Q108
KTC3199 GR
0V
R110
4.7K
R106
3.3K
0.7V
0V
M_GND
ERASE
TAPE2_R2 34
21132
Q106
A_GND
4321
C107 0.001
R109
4.7K Q105
2SC2389 SE
0.7V 0V
2SC2389 SE
TAPE2_R1
TAPE2_L1
TAPE2_L2
7
5
6
5
6
7
Q107
KTC3199 GR
0V
0V
R105
3.3K 0V
C105 180P
0V
R107
47K
2.2K
0.7V
R103
0V
Q103 2SC2389 SE
PLAYBACK SIGNAL RECORD SIGNAL
H
TAPE1
PLAYBACK HEAD
R-CH
L-CH
• NOTES ON SCHEMATIC DIAGRAM can be found on page 38.
1
23456
Figure 20 SCHEMATIC DIAGRAM (3/12)
ERASE HEAD
– 20 –
R-CH
L-CH
PLAYBACK HEAD
TAPE2
RECORD/
7
8 9 10 11 12
CNS303
P18 12 - A
TO MAIN PWB
C350 0.022
C352 10/16
R351
5.6K C351 0.022
FE301
FM FRONTEND
VR351 10K(B)
R356 1K
C368 1/50
R357 470K
C374
0.033
C367 1/50
R350
2.7K
C365 0.022
C366 0.001
C364 10/16 C363 0.022
C343 33P
C361 0.022
C362
3.3/50
R358
8.2K L353
1mH
C334
27P(UJ)
R323
68K
C323
0.022
C373
0.033
R361
1.2K
C371
1/50
IC303
LA1832
FM IF DET./
FM MPX./AM IF
T302
AM
TRACKING fH
C331
0.047
C332
0.022
VD301
SVC348S
C380
10/16
C387
0.022
C392
0.001
R382
150
C337
0.022
C375
3.3/50
R392
390
R391
390
R383
5.6K
R365
10K
R366
10K
R368
33K
R367
1K
D353 DS1SS133
C384
0.001
C394
47/16
C397
0.022
C301
0.001
D304
DS1SS133
D303
DS1SS133
SO301 ANTENNA TERMINAL
D302
DS1SS133
D301
DS1SS133
C338
0.001
C341
0.022
L342
2.2mH
R364 47K
R369
1.2K
R336 1K
AM BAND
COVERAGE fL
C335 560P
R371 1K
R374 1K
R372 1K R373 1K
Q371
KTA1266 GR
D352
DS1SS133
R384
5.6K
R360
4.7K
R387
22K
ZD352
DZ3.9BSB
R376
1K
D351
DS1SS133
C391
47/16
R385
5.6K
Q360
KTA1266 GR
Q361
KRC107 M
R359
1.8K
R355
3.3K
C357
2.2/50
C358
1/50
C381 12P(CH)
C382
15P
(CH)
C393
1/50
C386
330P
R378 82K
L351
100µH
L352 100µH
R354
3.9K
C356
0.001
R363 47K
R398
1.2K
IC302
LC72131
PLL(TUNER)
CF302
C321 100/16
T351
CF352
R352 1K
R344 470
R345 4.7K
C347 0.022
C346 0.022
C345 0.022
R393
1K
C395
0.022
C396
100/10
ZD351
DZ5.1BSB
R395 47K
R381 10K
R380
1.5K
C372
1/50
R362
1.2K
C399
0.022
C398 100/10
C353
0.022
CF351
C354
0.022
C370 1/50
C355
22P
R353 270
Q354
KTC3199 GR
MUTING
Q353
KTC3199 GR
C385
0.01
X352
4.5MHz
R379
2.2K
SD
TUN_MUTE
D GND
DO
CLK
CE
DI
MO/ST
ST IND
MO/ST
B01
A+12V
A GND
L
R
F OUT
IF OUT
VCC
VT
GND
GND
GND ANT
VSS
AOUT
AIN
PD
VDD
AM IN
DO
CL
DI
CE
X IN
IF IN
REG
AM IF IN
GND
SD
STEREO
FM DET
VCC
IF OUT
PHASE
(FM/AM)
PHASE L-CH OUT R-CH OUT
MPX IN
FM/AM OUT
VSM
AM LOW CUT
AM RF IN
AM OSC IN
FM AFC
AM OSC OUT
AM MIX OUT
FM IF IN
9
8 7
6 5
4
3 2
1
9 8 7 6 5 4 3 2 1
8
7
6
5
4
3
2
1
9
8
7
6
5
4
3
2
1
R377 47K
C330
27P
(UJ)
T306
AM OSC.
FM MUTE LEVEL
AM ANTENNA
C342
0.022 1
2
3
1
2
3
AM IF
X351 456KHz
MPX VCO
TP302
CNP303
1
2
+B
+B
+B
+B
+B
+B
+B
3
TUNER PWB-G
FM SIGNAL AM SIGNAL
10
11
12
13 14
15
17
16
18 19 20
21 22
23 24
X OUT
FM IN
10
11
12 13 14
15 16 17
20 21 22
18 19
R375
68
AM
GND
FM 75 ohms
VOLTAGE
REGULATOR
MUTING
+B
CF351 FM DET.
10.7MHz
AM IF
FM IF
10.7MHz
Figure 21 SCHEMATIC DIAGRAM (4/12)
– 21 –
CD-PC1881V
CD-PC1881V
10K
C
D
C
6
A
M
A
MD1
MDO
MDCK
B
C
D
E
F
CNPV2
P28 1-E
TO CD VIDEOPWB
UN SW_5V
AC.RLY-CON
SP_RLY
P24 1-F
CNP806
TO POWER PWB
FFC701
CNP502
P18 1-D
TO MAIN PWB
MBUSY
CNS806
SW_5V
VF2 VF1
VLOAD
CNSV2
1 2 3 4
1 2 3 4 5 6 7
CNP701
1
25
1
4
BI703
1 2 3 4 5 6 7
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
SUB WOOFER
VOLUME
+B
+B
POWER SR.MUTE C.MUTE S.MUTE T_T1/T2 T_BIAS REC/PLAY H/PSW TUN_SM D_GND D_GND SPEANA3 SPEANA2 SPEANA1 M_12V CLK CE DI DO Q11 ENA A_GND
SUB_VOL_IN
SUB_VOL_OUT
VR701 20K(B)
+B
FL701
R715 1K
R716 1K
8.2K
FL DISPLAY
S05
S06
S07
S08
S09
S10
S11
S12
S13
S14
818182 83 84 85 86 87 88 89 90 91 92 93 94 95 9
S10
80
S8S7S6S5S4S3S2
VLOAD
79
S11
78
S12
77
S13
76
S14
75
S15
74
S16
73
S17
72
S18/DIST0
71
S19/DIST1
70
S20/DIST2
69 68
S21/DIST3
67
S22/DIST4
66
DISTOUT
R723 10K
R705 1K
R706 1K
R708 1K
R710 1K
R713 1K
R746
8.2K
65 64 63 62 61 60 59 58 57 56 55 54 53 52 51
SYSTEM CONTROL
MBUSY
SP-DET
MICROCOMPUTER
SPRLY
POWER
HI-CUT SR MUTE C MUTE S MUTE KEY JOG B KEY JOG A MDO T_T1T2 T-BIAS
H/P
FPA
R731 1K
R730 1K
T1FAS
CAM SW
VDD
R732 1K
52 51
R733 2.2K
G11
S01
S02
S03
S04
R789
1K
S1
G11
S9
IC701
IX0340AW
REC/PLAY
AC RLY-CON
U/D SW
T_MOT
T_SOL
TIMER LED
DNO SW
R736 1K
R737 1K
R734 2.2K
R735 1.8K
LED722
TIMER
SLI342UCJ
10K
R747
R752
8.2K R753
8.2K
R754
8.2K
G10
G09
G10
VSS
REMOCON
R738 1K
10K
R748
G08
G07
G06
31 32
1
VDD
C
CD
C
SPEAN
28
TUN S
29
T2 RUN
30
SYS STOP
O/C SW
PUIN SW
35363738394041424344454647484950
R739 10K
R741 1K
R740 1K
10K
R749
R755
10K
R756
10K R757 10K
G05
G5G6G7G8G9
AVREF
R750
M_GND
R701 100K
Q705
KTC3199 GR
D722
DS1SS133
R702 100K
Q706
KTC3199 GR
R729
1K
D721
DS1SS133
Q707
KTC3199 GR
R790
33
+B
R703 100K
C721
47/50
SW_5V
R728
R700
1K
10K
C702
1/50
F F F
1234
VOLUME JOG B
R719
10K
C703
0.001 LED724
SLI342YCJ
LED723
SLI342YCJ
+B
UNSW_5V
S20
S21
S22
6
5
D704
DS1SS133
VR702
C704
0.001
R725
390
+B
S15
S16
S17
S18
S19
8
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
9
7
R704 1K
R711 1K
R707 1K
R709 1K
R712 22K
R714 1K
A
R726
8.2K R727
+B
DISPLAY PWB-A2
TAPE MECHANISM PWB-F
FWM1
2+
TAPE MOTOR
FOOL PROOF
SWM4 F.A.S
SOLM1 SOLENOID
SWM5 CAM
SWM3
M
MM1
CNPM2
FWM2
2
1
4
PHM1 PHOTO INTERRUPTER
3
1
2 3 4 5 6 7 8 9
10 11 12
CNPM1
G
H
• NOTES ON SCHEMATIC DIAGRAM can be found on page 38.
1
23456
Figure 22 SCHEMATIC DIAGRAM (5/12)
CNSM1
1 2 3
4 5
6
7 8 9
10 11 12
– 22 –
BI701
MOTOR
1
GND
2
+12V
3
T2 RUN
4
FPA
5
T1FAS
6
SOLENOIDO
7
CAM SW
8
R758
1.2K
+B
R760
10K
Q702
12V
KTA1273 Y
12V
0V
Q703
KTA1271 Y
12V
12V
R759 10K
+B
0V
C705 47/25
D716 DS1SS133
+B
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