Sharp CD-K1861V User manual

– 1 –
CD-K1861V
CONTENTS Page
SAFETY PRECAUTION FOR SERVICE MANUAL ........................................................................................................... 2
VOLTAGE SELECTION..................................................................................................................................................... 2
SPECIFICATIONS ..............................................................................................................................................................3
NAMES OF PARTS ........................................................................................................................................................... 4
OPERATION MANUAL ...................................................................................................................................................... 6
DISASSEMBLY.................................................................................................................................................................. 7
REMOVING AND REINSTALLING THE MAIN PARTS..................................................................................................... 9
ADJUSTMENT ................................................................................................................................................................. 10
NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 12
BLOCK DIAGRAM ........................................................................................................................................................... 13
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD..............................................................................................16
VOLTAGE ........................................................................................................................................................................ 40
WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 41
TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 42
FUNCTION TABLE OF IC................................................................................................................................................ 47
FL DISPLAY..................................................................................................................................................................... 63
PARTS GUIDE/EXPLODED VIEW
CD-K1861V
• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.
NTSC/PAL
SHARP CORPORATION
SERVICE MANUAL
No. S0959CDK1861V
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
CD-K1861V Video CD Mini System consisting of CD-K1861V
(main unit) and CP-C861(speaker system).

CD-K1861V
– 2 –
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) TheLaserPowerOutputofthePickupinsidetheunitandreplacementservicepartshavealreadybeenadjustedpriortoshipping.
(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.
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.
Figure 2 AC POWER SUPPLY CORD AND AC PLUG ADAPTOR
92LPLUG027 92LPLUG155A
QACCA0001AW00 QACCB0009AW00
QACCE0012AW00
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.
Useof controls,adjustments orperformance ofprocedures
other than those specified herein may result in hazardous
radiation exposure.
Asthe laserbeam usedin thiscompact discplayer isharm-
ful to the eyes, do not attempt to disassemble the cabinet.
Refer servicing to qualified personnel only.
CAUTION 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.

– 3 –
CD-K1861V
Specifications for this model are subject to change without
prior notice.
SPECIFICATIONS
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
CD-K1861V
CP-C861
General
Power source: AC 110/127/220/230-240 V,
50/60 Hz
Power consumption: 180 W
Dimensions: Width; 270 mm (10-5/8")
Height; 330 mm (13")
Depth; 358 mm (14-1/8")
Weight: 10.5 kg (23.1 lbs.)
Amplifier section
Output power : MPO; 440 W (220 W + 220 W)
(10 % T.H.D.)
RMS; 300 W (150 W + 150 W)
(10 % T.H.D.)
Output terminals: Speakers; 6 ohms
Headphones; 16-50 ohms
(recommended; 32 ohms)
Video out; 1 Vp-p(75 ohms)
Input terminals: Video/Auxiliary (audio signal);
500 mV/47 kohms
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
D
y
namic ran
g
e: 90 dB
(
1 kHz
)
Cassette deck section
Frequency range: 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)
Video CD section
Video output format : PAL / PAL60 / NTSC
Tuner section
Frequency range: FM; 88 - 108 MHz
AM; 531 - 1,602 kHz
Speaker section
Type: 3-way type [20 cm (7-7/8") woofer,
8 cm (3-1/8") tweeter and super
tweeter]
Maximum input power: 300 W
Rated input power: 150 W
Impedance: 6 ohms
Dimensions: Width; 250 mm (9-13/16")
Height; 330 mm (13")
Depth; 335 mm (13-1/4")
Weight: 6.1 kg (13.4 lbs.)/each

CD-K1861V
– 4 –
NAMES OF PARTS
CD-K1861V
Front panel
1. Disc Number Selector Buttons
2. Disc Tray
3. Multi Indicator
4. Disc Skip Button
5. Open/Close Button
6. Extra Bass Indicator
7. FM Stereo Mode Indicator
8. FM Stereo Indicator
9. (VCD/CD) Play Indicator
10. (VCD/CD) Pause Indicator
11. (VCD/CD) Repeat Indicator
12. (VCD/CD) Disc Number Indicators
13. (VCD/CD/TUNER) Memory Indicator
14. Timer Play Indicator
15. Timer Record Indicator
16. Spectrum Analyzer/Volume Level Indicator
17. (TAPE 2) Record Indicator
18. Sleep Indicator
19. Timer Set Indicator
20. (VCD) Digest Button
21. (VCD) Book Mark 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. Timer/Sleep Button
25. Clock Button
26. (VCD) Playback Control Auto/Off Button
27. (VCD/CD) Karaoke/Audio Mode Button
28. (VCD) On Screen Display On/Off Button
29. On/Stand-by Button
30. Function Selector Button
31. Equalizer Mode Selector Button
32. Dimmer Button
33. Surround Button
34. Extra Bass/Demo Mode Button
35. Headphone Socket
36. (TAPE 2) Record Pause Button
37. Memory/Set Button
38. (VCD) Stop/Return Button
(CD/TAPE) Stop Button
39. (VCD) Play/Repeat/Select/Resume Button
(CD) Play/Repeat Button
(TAPE) Play Button
40. Tuning and Time Up/Down Buttons
41. Volume Control
42. Key Control Buttons
43. Microphone Sockets
44. Microphone Level Controls
45. Digital Echo Control
46. (TAPE 1) Cassette Compartment
47. (TAPE 2) Cassette Compartment
123 45
11
16 17 18
6
7
89
12
13
14
15
10
27
28
29
24
25
26
30
2019
38 39 40 4135 36 37
31
32
33
34
21 22 23
42 43 44 45
46 47

– 5 –
CD-K1861V
CP-C861
Rear panel
21. Video Output Socket
12. AC Power Lead
13. AM Aerial Terminal
14. Aerial Earth Terminal
15. FM 75 Ohms Aerial Terminal
16. Video/Auxiliary (Audio Signal) Input Sockets
17. AC Voltage Selector
18. Speaker Terminals
Speaker
21. Super Tweeter
12. Tweeter
13. Woofer
14. Bass Reflex Ducts
15. Speaker Terminals
Remote control
21. Remote Control Transmitter LED
12. On/Stand-by Button
13. Key Control Buttons
14. (VCD/CD) Karaoke/Audio Mode Button
15. (VCD/CD) Direct Search Buttons
16. (VCD) On Screen Display On/Off Button
17. (VCD) PAL/NTSC Select Button
18. (VCD) Book Mark Button
19. (VCD) Digest/Time Search Button
10. (VCD) VCD Auto/On Button
11. (VCD) Playback Control Auto/Off Button
12. (VCD/CD) Clear Button
13. (VCD/CD) Memory Button
14. (VCD/CD) Disc Skip Button
15. (VCD/CD) Random Button
16. (VCD/CD) Pause Button
17. (TAPE 2) Record Pause Button
18. (VCD) Skip/Previous Button
(CD) Track Down/Review Button
(TUNER) Preset Down Button
(TAPE 2) Rewind Button
19. (VCD) Skip/Next Button
(CD) Track Up/Cue Button
(TUNER) Preset Up Button
(TAPE 2) Fast Forward Button
20. (VCD) Stop/Return Button
(CD/TAPE) Stop Button
21. (VCD) Play/Repeat/Select/Resume Button
(CD) Play/Repeat Button
(TAPE) Play Button
22. Function Selector Buttons
23. Extra Bass Button
24. Equalizer Mode Button
25. Surround Button
26. Volume U
p
/Down Buttons
87
1
2
3
4
5
6
5
4
3
12
15
9
8
7
6
25
24
23
22
10
11
12
13
26
1417 16
20 2118 19
1
2
3
4
5
CD-K1861V

CD-K1861V
– 6 –
OPERATION MANUAL
SETTING THE CLOCK
(Main unit operation)
CLOCK ON/ STAND-BY MEMORY/ SET
TUNING/ TIME ( )
7
Press the MEMORY/SET button.
8
Press the TUNING/TIME ( or ) button to adjust the min- utes.
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 theAC 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. Perform 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.
1
PresstheON/STAND-BYbuttonto enterthe stand-bymode.
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
“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
PresstheTUNING/TIME ( or )buttonto adjustthehour. 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”.
In this example, the clock is set for the 24-hour (0:00) system.
1 2 3
1
2
PREPARATION FOR USE
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 con- trol 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. Keepthe remotecontrolawayfrommoisture,excessiveheat, shock, and vibrations.
Remote control
15
15
0.2 m - 6 m (8" - 20')
Reset the microcomputer under the following conditions:
To erase all of the stored memory contents (clock and timer settings, and tuner, video CD and CD presets). If the display is not correct. If the operation is not correct.
1PresstheON/STAND-BYbutton toenter the stand-bymode. 2Whilst 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

– 7 –
CD-K1861V
DISASSEMBLY
Caution on Disassembly
Follow the below-mentioned notes when disassembling
the unit and reassembling it, to keep it safe and ensure
excellent performance:
1. Take cassette tape and compact disc out of the unit.
2. Be sure to remove the power supply plug from the wall
outlet before starting to disassemble the unit.
3.Take offnylon bands or wire holderswhere theyneed to
beremovedwhendisassemblingtheunit.Afterservicing
theunit, besure to rearrange the leadswhere theywere
before disassembling.
4. Take sufficient care on static electricity of integrated
circuits and other circuits when servicing.
Figure 7-2
Figure 7-3
CD-K1861V
Figure 7-1
LOCK
LEVER
1 Top Cabinet 1. Screw ..................... (A1) x4 7-1
2 Side Panel 1. Screw ..................... (B1) x8 7-1
(Left/right)
3 CD Player Unit/ 1. Turn on the power supply, 7-2
CD Tray Cover open the disc tray, take out
the CD cover, and close.
(Note 1)
2. Screw ..................... (C1) x1
3. Hook....................... (C2) x3
4. Hook....................... (C3) x2
5. Socket .................... (C4) x5
4 Rear Panel 1. Screw ..................... (D1) x9 7-2,
(with Digital 8-1
Output PWB)
5 Main PWB/ 1. Screw ..................... (E1) x1 8-1
Tuner PWB 2. Socket .................... (E2) x4
3. Flat Cable............... (E3) x1
4. Tip .......................... (E4) x1
6 Front Panel 1. Screw ..................... (F1) x3 8-1
2. Socket .................... (F2) x1
7 Power Amp. PWB 1. Screw ..................... (G1) x7 8-2
2. Socket .................... (G2) x2
3. PWB Holder ........... (G3) x1
8 Power Supply PWB 1. Screw ..................... (H1) x4 8-2
9 Karaoke PWB 1. Screw ..................... (J1) x2 8-3
2. Tip .......................... (J2) x1
10 Display PWB/ 1. Screw ..................... (K1) x13 8-3
Switch PWB 2. Socket .................... (K2) x1
3. Hook....................... (K3) x2
4. Buttom.................... (K4) x1
11 Tape Mechanism 1. Open the cassette holder. 8-3
2. Screw...................... (L1) x6
12 Turntable 1. Screw ..................... (M1) x1 8-4
2. Cover ..................... (M2) x1
13 Disc Tray 1. Screw ..................... (N1) x2 8-4
2. Guide ..................... (N2) x2
14 CD Video PWB 1. Screw ..................... (P1) x2 8-5
(Note 2) 2. Socket .................... (P2) x4
15 CD Changer 1. Screw ..................... (Q1) x4 8-6
Mechanism
16 CD Mechanism 1. Screw ..................... (R1) x1 8-6
STEP REMOVAL PROCEDURE FIGURE
Note 1:
How to open the changer manually. (Fig. 7-3)
1. Change, turn fully the lock lever in the arrow direction
throughtheholeontheloadingchassisbottominthisstate.
After that, push forward the CD player base.
CD-K1861V
Note 2:
1.After removing theconnector forthe optical pickupfrom the
connector, wrap the conductive aluminium foil around the
front end of connector to protect the optical pickup from
electrostatic damage.
Top Cabinet Front Panel
(A1) x2
ø3 x12mm
(A1) x2
ø3 x12mm
Side Panel
(Left)
Side Panel
(Right)
(B1) x2
ø3 x10mm
(B1) x2
ø3 x10mm
(B1) x4
ø3 x10mm
Back Board
(D1) x1
ø3 x10mm
CD Tray Cover
CD Player
Unit
CD Video
PWB
Hook
(C2) x3
(C3) x1
(C4) x4
(C4) x1
1
1
2
Pull
(C3) x1
Rear Panel
(C1) x1
ø3 x10mm
(D1) x4
ø3 x10mm
(D1) x3
ø3 x6mm
Front Panel
Main PWB

CD-K1861V
– 8 –
Figure 8-1
Figure 8-2
Figure 8-3
Be careful when installing the CD changer mechanism.
InstalltheCDchangermechanismontheCDplayerbaseafter
the shift lever has been set in the highest position.
Figure 8-4
Figure 8-6
Figure 8-5
(E2) x2
(E4) x1
(E2) x1
(D1) x1
ø3 x10mm
(E3) x1
Front Panel
(E1) x1
ø3 x10mm
(F1) x3
ø3 x10mm
(F2) x1
Power Amp.
PWB
Power Supply
PWB
Tuner
PWB
Main
PWB
Power Amp.
PWB
(E2) x1
Main PWB
(G1) x5
ø3 x10mm
(G2) x1
(G2) x1
(G1) x2
ø3 x6mm
(H1) x4
ø4 x8mm
Push Push
1 1
2Pull
Power Amp.
PWB
(G3) x1
Power
Supply
PWB
Power Amp. PWB Heat Sink
Main
Chassis
Power
Transformer
Front Panel
Display
PWB
Switch PWB
Open
Cassette
Holder
(Left/Right)
Tape Mechanism
(K1) x2
ø3 x10mm
(K1) x11
ø3 x10mm
(L1) x6
ø3x10mm
(K2) x1
(K3) x2
(K4) x1
(J1) x2
ø3 x10mm
Karaoke
PWB
(J2) x1
(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
(P1) x1
ø3 x10mm
(P2) x2
(P2) x2 CD Player Unit
CD Video PWB
(P1) x1
ø3 x10mm
Washer
(Q1) x4
ø3 x12mm
(R1) x1
ø2.6 x10mm
CD Changer
Mechanism
CD Mechanism
Shift Lever
CD Player Base

– 9 –
CD-K1861V
1 Front Panel 1. Net.......................... (A1) x1 9-1
2. Rubber ................... (A2) x4
3. Screw ..................... (A3) x4
4. Tip .......................... (A4) x4 9-2
2 Woofer 1. Screw ..................... (B1) x4 9-2
3 Tweeter 1. Screw ..................... (C1) x4 9-2
4 Super Tweeter 1. Screw ..................... (D1) x2 9-2
STEP REMOVAL PROCEDURE FIGURE
Figure 9-1 Figure 9-2
How to remove the pickup (See Fig. 9-4)
1.Remove the screws(B1) x 2pcs., to removethe shaft (B2).
2. Remove the stop washer (B3) x 1 pc., to remove the gear
(B4).
3. Remove the pickup.
Figure 9-4
REMOVING AND REINSTALLING THE MAIN PARTS
CD MECHANISM SECTION
Performsteps1,2,3,12,13,14,15and16ofthedisassembly
method to remove the CD mechanism.
How to remove the loading motor
(See Fig. 9-3)
1. Remove the screws (A1) x 2 pcs., to remove the loading
motor.
Figure 9-3
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.
(A1) x2
ø2.6 x5mm
Loading Motor
Motor
PWB
(B1) x2
ø2.6 x6mm
Shaft
(B2) x1
Stop Washer
(B3) x1
Gear
(B4) x1
CD Mechanism
Pickup
CP-C861
(A1)x1
Front Panel
(A3)x4
ø4x18mm
(A2)x4
Cabinet
Front Panel
Tweeter
Super
Tweeter
(C1)x4
ø3x10mm
(D1)x2
ø3x10mm
Woofer
(B1)x4
ø4x12mm
(A4)x4
Cabinet

CD-K1861V
– 10 –
MECHANISM SECTION ADJUSTMENT
Figure 10 ADJUSTMENT POINTS
•Driving Force Check
Torque Meter Specified Value
Play: TW-2412 Tape 1: Over 80 g
Tape 2: Over 80 g
•Torque Check
Torque Meter Specified Value
Tape 1 Tape 2
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 Adjusting
Point Specified
Value Instrument
Connection
Normal MTT-111 Variable 3,000 ±Speaker
speed resistor in 30 Hz terminal
motor.
(MM1)
TUNER SECTION
fL: Low-range frequency
fH: High-renge frequency
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
Test Stage Frequency Frequency
Display Setting/
Adjusting
Parts
Instrument
Connection
AM IF 450 kHz 1,602 kHz T351 *1
AM Band — 531 kHz (fL): T306 *2
Coverage 1.1 ±0.1 V
AM 990 kHz 990 kHz (fH): T302 *1
Tracking
*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
Adjusting
Parts Instrument Connection
Frequency
Display
Frequency
• FM Mute Level
Signal generator: 1 kHz, 40 kHz dev., FM modulated
98.00 MHz 98.00 MHz VR351 Input: Antenna
(25 dBµV) Output: Speaker
Terminal
TP302
R357
T351 VR351
FM MUTE
LEVEL
R336 TP301
FE301
IC303
T306 T302
SO301
ANTENNA
TERMINAL
TUNER PWB
AM IF
AM BAND
COVERAGE fL
AM
TRACKING fH
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
TAPE MECHANISM
MM 1
Motor
Variable Resistor in motor