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
NAMES OF PARTS ........................................................................................................................................................... 4
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
FUNCTION TABLE OF IC................................................................................................................................................ 44
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.
CAUTIONLaser 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.
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
QPLGA0003AWZZQPLGA0004AWZZ
– 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.
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:
①
Press the CLOCK button.
➁
Within 5 seconds, press the MEMORY/SET button.➂Perform steps 6 - 9 above.
To change the time display mode:
①
Perform steps 1 - 2 in the section “RESETTING THE MI-
CROCOMPUTER”, .
➁
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.
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
11
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
STEPREMOVAL
1Front Speaker1. Front Panel ............ (A1) x110-1
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-2412Tape 1: Over 80 g
• Torque Check
Torque Meter
Tape 1
Play: TW-211130 to 60 g. cm30 to 60 g.cm
Fast forward: TW-2231—60 to 120 g.cm
Rewind: TW-2231—60 to 120 g.cm
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
When a malfunction occurs during CD operation, an error
code will be displayed to identify the function in CD operation
which failed.
ErrorState Code
0001Cannot detect pickup-in SW
0101Tray close operation error
0105Tray close operation error
0201Tray open operation error
0203Tray open operation error
0304Disc skip operation error
0305Disc skip operation error
0307Disc skip operation error
– 12 –
TEST MODE
123
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.
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 LogicDolby Pro Logic On mode
Output point Bypass modeNormal modePhantom mode
IC50112 pin L-outOutput enabled stateOutput enabled stateOutput enabled state
11 pin R-out Output enabled stateOutput enabled stateOutput enabled state
IC501 9pin C-outNo outputOutput enabled stateNo output
IC50110pin S-out No outputOutput enabled stateOutput enabled state
SP OUTL-chOutput enabled stateOutput enabled stateOutput enabled state
(SO901)R-ch Output enabled stateOutput enabled stateOutput enabled state
SP OUT C-chNo output in MUTE (Q404) stateOutput enabled stateNo output in MUTE (Q404) state
(SO901)
SP OUT S-chNo output in MUTE (Q403) stateOutput enabled stateOutput enabled state
(SO901)
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←
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 pointNormal mode
SP outL-chAlmost no output (only omitting component)
(SO901)R-chAlmost 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 pointPhantom mode
SP outL-chInput 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 pointNormal mode
SP outL-ch
(SO901)R-ch
(SO901) SP out C-ch
(SO901) SP out S-ch Input signal is output.
Output pointPhantom mode
SP outL-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.