Sharp QT-CD111H User manual

QT-CD111H/110H
– 1 –
Illustration: QT-CD111H
CONTENTS Page
SAFETY PRECAUTION FOR SERVICE MANUAL ........................................................................................................... 2
IMPORTANT SERVICE NOTES (111H FOR UK ONLY) .................................................................................................. 3
SPECIFICATIONS ............................................................................................................................................................. 3
NAMES OF PARTS ........................................................................................................................................................... 4
DISASSEMBLY.................................................................................................................................................................. 5
REMOVING AND REINSTALLING THE MAIN PARTS..................................................................................................... 6
ADJUSTMENT ................................................................................................................................................................... 7
NOTES ON SCHEMATIC DIAGRAM ................................................................................................................................ 9
TYPES OF TRANSISTOR ................................................................................................................................................. 9
BLOCK DIAGRAM ........................................................................................................................................................... 10
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD............................................................................................. 12
WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 18
TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 19
FUNCTION TABLE OF IC................................................................................................................................................ 22
PARTS GUIDE/EXPLODED VIEW
PACKING METHOD (111H FOR UK ONLY)
• In the interests of user-safety the set should be restored to its
originalconditionandonlypartsidenticaltothosespecifiedshould
be used.
QT-CD111H
QT-CD110H
SERVICE MANUAL
SHARP CORPORATION
No. S6844QTCD111H
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
• Note for users in UK
Recording and playback of any material may require consent
which SHARP is unable to give. Please refer particularly to the
provisions of Copyright Act 1956, the Dramatic and Musical
Performers Protection Act 1956, the Performers Protection Acts
1963 and 1972 and to any subsequent statutory enactments and
orders.
QT-CD110H is different from QT-CD111H in
Control Panel color.

QT-CD111H/110H
– 2 –
SAFETY PRECATION FOR
SERVICE MANUAL
Precaution to be taken when replacing and servicing the
Laser Pickup.
The ael (ACCESSIBLE EMMISSION LEVEL) of the laser
power output is less than class 1 but the laser component is
capable of emitting radiation exceeding the limit for class 1.
Therefore it is important that the following precautions are
observerduringservicingtoprotectyoureyesagainstexposure
to the laser beam.
(1) When the cabinet is removed, the power is turned on
withoutacompactdiscinpositionandthepick-upisonthe
outer edge the laser will light for several seconds to detect
a disc. Do not look into the pick-up lens.
(2)Thelaserpoweroutputofthepick-upunitandreplacement
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-USEofcontrolsoradjustments,orpereformance
ofproceduresotherthanthosespecifiedhereinmayresult
in hazardous radiation exposure.
(111H For UK)
(111H Except for UK/110H)
Laser Diode Properties
Material: GaAIAs
Wavelength: 780 nm
Emission Duration: continuous
Laser Output: max. 0.6 mW
LASER KLASSE 1
LUOKAN 1 LASERLAITE
KLASS 1 LASERAPPARAT
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.
VAROITUS! LAITTEEN KÄYTTÄMINEN
MUULLA KUIN TÄSSÄ
KÄYTTÖOHJEESSA MAINITULLA
TAVALLA SAATTAA ALTISTAA
KÄYTTÄJÄN TURVALLISUUSLUOKAN 1
YLITTÄVÄLLENÄKYMÄTTÖMÄLLE
LASERSÄTEILYLLE.
VARNING - OM APPARATEN ANVÄNDS
PÅ ANNAT SÄTT ÄN I DENNA
BRUKSANVISNING SPECIFICERAS. KAN
ANVÄNDAREN UTSÄTTAS FÖR OSYNLIG
LASERSTRÅLNING, SOM ÖVERSKRIDER
GRÄNSEN FÖR LASERKLASS 1.

QT-CD111H/110H
– 3 –
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
SPECIFICATIONS
General
Power source: AC 230 - 240V, 50 Hz
DC 12 V [ "D" size (UM/SUM-1,
R20 or HP-2) battery x 8]
Power consumption: 11 W
Output power: PMPO; 28 W
(111H Except for UK/ MPO; 8.4 W (4.2 W + 4.2 W)
110H) (AC operation, DIN 45 324)
RMS; 4.6 W (2.3 W + 2.3 W)
(DC operation, DIN 45 324)
Output power: MPO(Max.);8.4W(4.2W+4.2W)
(111H For UK) (AC operation)
RMS; 4.6 W (2.3 W + 2.3 W)
(DC operation, 10 % T.H.D.)
Speakers: 10 cm (4") full-range speaker x 2
Output terminal: Headphones; 16-50 ohms
(recommended; 32 ohms)
Dimensions: Width; 480 mm (18-15/16")
Height; 153 mm (6-1/16")
Depth; 254 mm (10")
Weight: 3.2 kg (7.1 Ibs.) without batteries
Radio
Frequency range: FM; 87.5 - 108 MHz
AM; 526.5 - 1,606.5 kHz
Tape recorder
Frequency response: 50 - 14,000 Hz (Normal tape)
Signal/noise ratio: 50 dB
Wow and flitter: 0.3 % (DIN 45 511)
(111H Except for UK/110H)
Wow and flitter: 0.25 % (WRMS)
(111H For UK)
Motor: DC 12 V electric governor
Bias system: AC bias
Erase system: Magnet erase
Compact disc player
Disc: Compact disc
Signal readout: Non-contact, 3-beam semi-
conductor laser pickup
Audio channels: 2
Quantization: 16-bit linear quantization
Filter: 4-tims oversampling digital filter
D/A converter: 1-bit D/A converter
Wow and flutter: Unmeasurable
(less than 0.001% W. peak)
Specifications for this model are subject to change without
prior notice.
IMPORTANT SERVICE NOTES (111H FOR UK ONLY)
Beforereturningthe unit tothecustomer after completionofa repairoradjustment it isnecessaryfor the followingwithstand voltage
test to be applied to ensure the unit is safe for the customer to use.
Setting of Withstanding Voltage Tester and set.
NG: The “NG” lamp lights and the buzzor sounds.
OK: The “GOOD” lamp lights.
Judgment
Unit
Set current (Cutoff current)
Set time
Set name
Withstanding Voltage Tester
Test voltage
Set value
4,240 VPEAK
3,000 VRMS
6 secs
4 mA
PROBE
AC OUT UNIT
SHORT-CIRCUT
AC POWER
SUPPLY CORD
CONNECT THE PROBE
TO GND OF BATTERY
SPRING
WITHSTANDING
VOLTAGE TESTER

QT-CD111H/110H
– 4 –
NAMES OF PARTS
1. Cassette Compartment
2. CD Compartment
3. Tuning Control
4. (TAPE) Record Button:
5. (TAPE) Play Button:
6. (TAPE) Rewind Button:
7. (TAPE) Fast Forward Button:
8. (TAPE) Stop/Eject Button:
9. (TAPE) Pause Button:
10. CD Eject Button:
/
11. (CD) Play Indicator:
12. (CD) Track Number Indicator
13. (CD) Repeat Indicator:
14. Volume Control
15. Stand-by,On/Function Selector Switch
16. Extra Bass Button: X-BASS
17. (CD) Track Down/Review Button:
18. (CD) Track Up/Cue Button:
19. (CD) Stop Button:
20. (CD) Play/Repeat Button:
21. FM Telescopic Rod Aerial
22. Headphones Socket
23. Battery Compartment
24. AC Power Input Socket
12
3
456789
10
11 12
13
14 15 16 17 18 19 20
21
23 24
22

QT-CD111H/110H
– 5 –
1 Rear Cabinet 1. Screw ................. (A1) x10 5-1
2. Socket .................. (A2) x1 5-2
2 Top Cabinet 1. Knob..................... (B1) x1 5-2
(with CD Mechanism/ 2. Screw ................... (B2) x3
Tape Mechanism/ 3. Socket .................. (B3) x1
Main PWB/
Headphones PWB)
3 Headphones PWB 1. Screw .................. (C1) x2 5-3
4 Main PWB/ 1. Screw ................... (D1) x6 5-3
Switch PWB 2. Socket ..................(D2) x4 5-3,5-4
5 Tape Mechanism 1. Screw ................... (E1) x4 5-4
6 CD Mechanism 1. Screw ................... (F1) x3 5-4
7 Terminal PWB 1. Screw ...................(G1) x5 5-5
2. Hook.....................(G2) x1
DISASSEMBLY
Caution on Disassembly
Follow the below-mentioned notes when disassembling the
unitandreassemblingit,tokeepitsafeandensureexcellent
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 be
removedwhendisassemblingtheunit.Afterservicingthe
unit, be sure to rearrange the leads where they were
before disassembling.
4. Take suffcient care on static electricity of integrated
circuits and other circuits when servicing.
STEP REMOVAL PROCEDURE FIGURE
Figure 5-4
Figure 5-3
Figure 5-5
Figure 5-1
Figure 5-2
(D1)x5
ø3x10mm
(C1)x2
ø3x10mm
(D2)x1
Switch PWB
(D1)x1
ø3x10mm
Main PWB
Top Cabinet
Headphones
PWB
Top Cabinet
Tape
Mechanism
CD Mechanism
(F1)x3
ø2.5x10mm
(E1)x4
ø3x10mm
(D2)x2
(D2)x1
(A1)x3
ø3x12mm (A1)x1
ø3x12mm
(A1)x6
ø3x20mm
Rear Cabinet
Front Cabinet
(B2)x3
ø3x12mm (A2)x1 (B3)x1Front Cabinet
Headphones
PWB
Top Cabinet (B1)x1
Main PWB
(G1)x2
ø3x12mm
(G1)x1
ø3x10mm
(G1)x2
ø3x14mm
Terminal PWB
Spacer PWB
Driver
Push
(G2)x1

QT-CD111H/110H
– 6 –
CD MECHANISM SECTION
Perform steps 1, 2, 4 and 6 of the disassembly method to
remove the CD mechanism.
How to remove the pickup (See Fig. 6.)
1. Remove the screws (A1) x 2 pcs., to remove the shaft (A2)
x1 pc.
2. Remove the stop washer (A3) x1 pc., to remove the gear
(A4) x 1 pc.
3. Remove the pickup.
Figure 6
REMOVING AND REINSTALLINGTHE MAIN PARTS
(A1) x2
2.6 x6mm
Stop
Washer
(A3) x1
CD
Mechanism
Gear
(A4) x1
Shaft
(A2) x1
Pickup

QT-CD111H/110H
– 7 –
MECHANISM SECTION
• Driving Force Check
PLAY: TW-2412 Over 120 g
Torque Meter Specified Value
• Torque Check
Torque Meter Specified Value
Play: TW-2111 25 to 65 g.cm
Fast Forward: TW-2231 60 to 130 g.cm
Rewind: TW-2231 60 to 130 g.cm
• Tape Speed
MTT-111 In motor 3,000 ±90 Hz Output: Speaker
Teaminal
(CNP201 Load
resistance: 8 ohms)
Instrument
Connection
Specified
Value
Test
Tape
TAPE SECTION
Position of each switch or control
Volume control Max
Function switch Tape/Power Off
X-BASS On
• Bias Oscillation
Adjustment Point
• Playback Amplifier Sensitivity Check
Instrument Connection
Test Tape
MTT-118 1.8 V ±3 dB Speaker Terminal
(Load resistance: 8 ohms)
Specified Value
ADJUSTMENT
TUNER SECTION
fL: Low-range frequency
fH: High-range frequency
• FM IF/RF
IF T1
Detection T2
Band Coverage fL: L2
fH: TC2
Tracking 88.0 MHz: L1
108.0 MHz: TC1
Test Stage Specified
Value/Adjusting
Point
Instrument
Connection
Input: Pin 1 of IC1
Output: Pin 17 of IC2
Iuput: Antenna
Output: Speaker
Terminal (CNP201
Load resistance: 8
ohms)
• AM IF/RF
IF T3 Input: Antenna
Output: Pin 19 of IC2
Band Coverage fL: L4 Input: Antenna
fH: TC4 Output: Speaker
Tracking 600 kHz: L3 Terminal (CNP201
1,400 kHz: TC3 Load resistance: 8
ohms)
Test Stage Specified
Value/Adjusting
Point
Instrument
Connection
• VCO Frequency
Specified
Value Instrument Connection
VR1 76 kHz ±200 Hz Pin 13, pin 21 and
ground of IC2
Adjusting Point
Note:
After preparing the test circuit shown in Fig. 7-1, connect the
Pin 13, Pin 21 and ground of the IC2 with the test circuit, and
measurethevalue.At thistime,applyastandardunmodulated
signal input and adjust the VCO.
Pin 13 of IC2 Pin 21 of IC2
D
G
S
10 kohm
TO FREQUENCY
COUNTER
FET : 2SK19 or 2SK54
Figure 7-1 VCO FREQUENCY TEST CIRCUIT
Figure 7-2 ADJUSTMENT POINTS
• Head Azimuth
Torque Meter Specified Value
MTT-114 Output: Speaker Terminal
(CNP201 Load resistance: 8 ohms)
Adjusting
Point
Specified Value Instrument
Connection
L301 82 kHz ±6 kHz Pin 2 of CNP201
– 6 kHz
AM
TRACKING
fL
FM
DETECTION
T2
VCO
VR1
IC2
IC1 T1
FM IF
AM IF
L4
TC4 TC2
TC1
TC3
AM
TRACKING
fH
L1
L2
AM BAND
COVERAGE FM
TRACKING FM BAND
COVERAGE
fH fL fH fL fH fL
T3
L3
AM BAR ANTENNA
FM ROD ATENNA
MAIN PWB
1
1
13
17
19
21

QT-CD111H/110H
– 8 –
CD SECTION
Since this CD system incorporates the following automatic
adjustmentfunction,whenthepickupisreplaced,itisnecessary
to reajust it.
Sincethis CDunitdoesnotneedadjustment, the combination
of PWB and laser pickup unit is not restricted.
TEST MODE
While holding down the "STOP" button, move the FUNCTION/POWER switch to "CD".
Then, release the "STOP" button and, within 0.5 second, connect the TEST POINT to GND (within 0.5 second).
(See Fig. 8)
Start
Note 1. When the CD LID switch is in the OFF position, the unit will be able to enter the test mode.
However, playback cannot be performed in this mode.
2. You can only move the pickup.
3. The LCD display should be the same as it is for normal CD operations.
1
2When the "PLAY" button is pressed, the laser will be lit, and when the "STOP" button is pressed, it will be
turned off. Playback will also start and stop when these buttons are pressed.
Turning the tracking servo on or off.
3
a. If the "PLAY" button is pressed while in the stop mode, the laser will simply be turned on at first.
b. If the laser is lit and the "PLAY" button is pressed again, playback will start from the current pickup position.
c. If the "STOP" button is pressed, playback will stop. When pressed again, the laser will be turned off.
a. Each time the PAUSE button is pressed during playback, the tracking servo will be turned on or off.
(Note: If the PLAY button is pressed while in the stop mode, the tracking servo will automatically be
turned on.)
Operation The use of the "UP/CUE" button will move the pickup to the outermost position.
The use of the "DOWN/REVIEW" button will move the pickup to the innermost position.
While holding down the "STOP" button, move the FUNCTION/POWER switch to "CD".
Then, release the "STOP" button and, within 0.5 second, press the REVIEW/DOWN button.
Start
Display
LCD MODE
1
2
3
*Afterthenumber 3 hasappearedinthedisplay,eachtimethe"UP/CUE"buttonispressed,thedisplaywillswitch
in the following order: 1 , 2 , and then 3 .
1 second1 second
Figure 8
SW774
TRACK DOWN/
REVIEW
R771
3.9K
TEST
POINT
R772
2.7K
R773
1.8K
R774
1.5K
R776
10K
SW773
TRACK UP/
CUE
SW771
PLAY
SW7712
STOP
TO CD SECTION
+B
31
SWITCH PWB – A2

QT-CD111H/110H
– 9 –
NOTES ON SCHEMATIC DIAGRAM
1. Tuner
( ): AM mode
Marking except for ( ): FM mode
2. CD
( ): Play mode
Marking except for ( ): Stop state
3. Deck section
( ): Record mode
Marking except for ( ): Playback mode
Display / Control section:
( ): Active state
Marking except for ( ): CD Function mode at stop state
• Schematic diagram and Wiring Side of P.W.Board for this
model are subject to change for improvement without prior
notice.
• 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.
• Resistor:
To differentiate the units of resistors, the 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 an
ohm resistor. The resistor designated "Fusible" is a fuse type
resistor
• Capacitor:
To indicate the unit of capacitor, a symbol P is used: this
symbolPmeansmicro-micro-faradandtheunitofthecapacitor
withoutsuchasymbolismicrofarad.Astoelectrolyticcapacitor,
the expression “capacitance/withstand voltage” is used.
(CH), (TH), (RH), (UJ): Temperature compensation
(ML): Mylar type
(P.P.): Polypropylene type
•The indicated voltagein each sectionis the onemeasured by
Digital Multimeter between such a section and the chassis
with no signal given.
SW102 RECODE/PLAYBACK OFF—ON
SW201 FUNCTION/POWER TAPE—AM—
FM AUTO—CD/
OFF—ON
SW203 X-BASS OFF—ON
SW601 TAPE MAIN OFF—ON
SW702 PICKUP IN OFF—ON
REF. NO DESCRIPTION POSITION
SW761 CD LID OPEN/CLOSE OFF—ON
SW771 PLAY/REPEAT OFF—ON
SW772 STOP OFF—ON
SW773 TRACK UP/CUE OFF—ON
SW774 TRACK DOWN/REVIEW OFF—ON
Figure 9 TYPES OF TRANSISTOR
REF. NO DESCRIPTION POSITION
ECB
(S)(G)(D)
(1) (2) (3)
FRONT
VIEW
2SC1815 GR

QT-CD111H/110H
– 10 –
Figure 10 BLOCK DIAGRAM (1/2)
62
51 37
46
56
39
55
38
54
33
53
32
11
8
42
21
25
20
38
34
35
36
~
+5V
FOCUS COIL
TRACKING COIL
PICKUP UNIT
310 19 23 25
1 2
17
11
18
12
49 50 52 5351 54
Q804
+5V
23
6
63
43
64
10
44
12
45
9
14
13
43
16
44
17
18 19
20
15
32 40
161 58 57
CL, DAT, SELIAL CONTROL
CONSTANT VOLTAGE REGULATOR
16 27
31
28
15
30
29
M
M
MOTOR
SLIDE
MOTOR
SPIN
1
2
3
4
9~~ 1714
XIN
XOUT
K1
CD
OPERATION
KEY
SW771~SW774
LID
SW761
OPEN/CLOSE
~~
57
24 27 28 31
30
60 41 44 33 22 23
37
CD LCD LCD701
PICKUP IN
PU-IN SW
19
13
14
SL+
SL–
+7.4V
(CD)
1 2 3
4
5
6 7
GND (A) R-CH L-CH GND (D) POWER GND MUTE +7.4V (D) SECTION
MAIN
TO
VVDD
XIN
XOUT
VDD
XVDD
EFMO EFMIN CLV+ CLV–
V/P HFL
TES TOFF JP– JP+ TGL
RES. CQCK. COIN
SQOUT. RWC. WRQ
LCHO
LC78622E
IC802
SERVO/SIGNAL
CONTROL
16.93MHz
XL801
SLI
SLC
CV+
JP–
DRF
CE
DAT
CL
CLK
THLD/DEF
SLD
SLEO
SPO
FD
TO
SL+ SL–
F E FIN1 FIN2 64 62
+5V
Q805
VCC1
LDO
LASER
DRIVER
SERVO AMP.
LA9240M
IC801
22 2+7.4V
7 5 6 8
28
26 13 27
IC804
BA5914FP
FOCUS/TRACKING
/SPIN/SLIDE
DRIVER
M701
M702
SW702
RES
SL–
DRF
WRQ
RESET
VLC3
VDD
+5V
(D)
4MHz
X701
IC701
IX0105AW
SYSTEM
MICROCOMPUTER
COM0
SEG1
SEG4
COM3
CD LID

QT-CD111H/110H
– 11 –
Figure 11 BLOCK DIAGRAM (2/2)
2
6
2
3
3
4
4
5
5
5
11
1
7
7
8
8
8
9
9
2
6
6
2
3 4
5 6 7
10
12
13 14
15
15
11
11
17
18
19
12
10
22
23
24
21
20
51
8
9
6
12
FM ROD ANTENNA
F1
B.P.F
L1
FM RF
L3
AM BAR ANT.
L2
FM OSC
OSCMIX
VCC
RF AMP
IC1
LA1186N
FM FRONT END
FM
+B
T1
FM IF CF
10.7MHz
IC2
LA1805
FM / AM
IF MPX.
AM IF
T3 CP T2
FM DET
455kHz
L5
AM OSC
Q201 Q202
AM / FM
SELECT
+B
VR1
VCO TUNER
+B
IC501
LA4597
POWER AMP.
L
VOLUME
X-BASS
SW203
A,B VR201
A,B
STANBY
R
IC203
KIA7808P
VOLTAGE
REGULATOR
+B2
+B1
SP501
L-CH
SPEAKERS
SP502
R-CH
SO651
SW201-C
POWER/
FUNCTION
AM / FM
SELECT
+B
FM +B
SW201-D POWER /
FUNCTION
RADIO
TAPE
REC
POWER/
FUNCTION
SW201-A,B
CD
EC / PB
SW102
A,F
P. B
REC
IC101
EQULIZER
AMP.
BA331IL
REC
REC
P.B
P.B P.B
L
R
L
R
SW102
REC / PB
B.D
REC / PB
SW102
C,E
L-CH
REC / PB
HEAD
R-CH
(AUDIO GND)
+7.4V
+B2
(DIGITAL GND)
(POWER GND)
FROM
CD
SECTION
R-CH
ERASE
HEAD SW102-H
REC / PB BIAS
OSC.
C201
L201 SW102-G
REC / PB
+B1 M601
TAPE
MOTOR SW601
MAIN
D651~D654
RECTIFIER
TUNER
+B
T651
POWER
TRANSFORMER
BATTERY
DC12V
[' D' SIZE (UM/SUM-1,
R20 or HP-2)BATTERYx8]
AC INPUT
AC 230-240V 50Hz
REG. OSC
RF MPX
FM - IF DET. POST
AMP.
MUTE
TU
DRIV.
AGC
GND
AM - IF DET.
LEVEL - DBT.
PILOT
DET. TRIG. ST.
DRIV.
VCC
FF
FFFF
VCO
ST.
SWIT.
DECODER
PHASE
DET.
L-CH
MUTE

QT-CD111H/110H
– 12 –
A
B
C
D
E
F
G
H
1234 5 6
• The numbers 1 to 12 are waveform numbers shown in page 18.
Figure 12 SCHEMATIC DIAGRAM (1/4)
LCD701
12345678
FW701
IC701
IX0105AW
SYSTEM
MICROCOMPUTER
R822
6.8K
IC801
LA9241M
SERVO AMP.
C835 0.1/50 C837 10/16 C838 0.01 C839 1/50
C840 0.33/50
R803
15K
R802
100K
C805
0.033
R804
2.2K
C804
0.001
R808
12K C810
180P
R809
27K
R807
1K C809
0.047
R811
3.3K
C808
0.068
R805
6.8K
C806
0.033
C807
0.1/50 R806
100
C803
0.1/50
R833
5.6K
R
4
C830
2P
(CH)
C833
0.001 R8
47
K
C834
0.033
R832
56K
C
8
22
0
R
8
C
R828
1K
R839
22K
R840
22K
C813
0.1
R812
15K
R829
1K
R814 10K
R815
47K
C812
330P
R816
1.5K
C814
0.01
R813
33K
R820 10K
R819 39K
R817
82K
C815
0.0047
R821 56K C816
0.001
R830
1K
R824 10K
C818
1/50 C819
47/16
R825
1.2K R826
220K C820
0.0033
R827
220K
C817
0.47/50
R823
1.2K
C811
0.1
R709
1K
R710
10K
R711
2.7K
C704
100/10
C705
0.022
R713
1K
R736
1K
C702 0.022
R708
1K
R716 10K
R718 15K R720 15K R722 15K R719 15K R723 15K R725 15K
R734
1K R730
1K
R721 15K R724 15K
R727
1K
R726 1K
R728 1K
R729 1K
R731 1K
R732 1K
R733 1K
R735 1K
X701
4MHz
R745
10K D741
1N4148
R744
10K C741
3.3/50
R742
1K
R743
100K
R740
4.7K
R741
3.3K
D740 1N4148
Q740
2SC1815 GR
C740
0.01
R714
10K
R715
15K
C701 0.022
R831
1K
Q805
S9012H
C849
0.022
R842
22
C848
1/50
C
8
0.
1
C845
4.7/50
R871
4.7K
R772 2.7K R771
3.9K
R773 1.8K
SW772
STOP
SW771
PLAY/
REPEAT
SW774
TRACK DOWN/
REVIEW
10K
R776
R774 1.5K
SW773
TRACK UP/ CUE
SW761
CD LID
OPEN/CLOSE
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
32
31
30
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
18
17
16
15
14
13121110
9
8
7
6
5
4321
1
21
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
15
16
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
33
34
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
5354
55
56
57
5859
60
61
62
63
64

+B
+B +B
+B
+B
112
1
3
3
RES
CQCK
CO IN
RWC
SL+
SL–
DRF
SQOUT
WRQ
PU IN
DIGITAL GND
5V
+B
+B
+B
+B
+B
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
SEG0
P00
P01
P02
P10 POWER IN D1 MUTE D4 COCK D3 RES D5 COIN D6 RWC D7 SL+ D8 SL–
DFR P20
SQOUT P21
WRQ P22
PU-IN P23
RESET
XIN
XOUT
VSS
VDD
XCOUT
XCIN
AVSS
VREF
P30
P31
P32
P33
P3P40
AIN5
SIMUKE AIN6
KIDSW AIN7
VLC3 VLC2 VLC1
COM3 COM2 COM1 COM0
SEG16
VCC1
LDS
LDD
BH1
PH1
LF2
VR
REFI
VCC2
FSS
DRF
CE
DAT
CL
CLK
DEF
NC
TBC
FSC
GND
SLI
SLC
RFS–
RFSM
CV+
CV–
SLOF
HFL
TES
TOFF
TGL
JP+
JP–
A GND
FE– FE FA– FA
TO
JP
TE
TE–
TESI
TH
SCI
TA
TD–
TD
TB
F
EFIN1
FIN2
FD–
FD
SPD SP– SPG SP NC SL+ SL– SLD SLEQ
VREF
GND
SWITCH PWB-A2
CD SIGNAL
MAIN PWB(2/2)
9
8
7
6
5
4
3
2
1
12
11
10
PIN
NO. VOLTAGE
IC701
0V
0V
0V
0V
0V
0V
3.9V
0V
5V
4.1V
4.1V
0V
0V
0V
0.4V
0.4V
0V
0V
0V
0V
5V
2.5V
2.5V
0V
5V
5V
0V
0V
5V
4.8V
0V
3.8V
41
40
39
38
37
36
35
34
33
44
43
42
15
14
13
47
46
45
18
17
16
50
49
48
21
20
19
53
52
51
23
22 55 54
26
25
24
58
57
56
29
28
27
61
60
59
32
31
30
64
63
62
PIN
NO. VOLTAGE
5V
0V
0V
0V
0.4V
5V
3.1V
1.5V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
0V
0V
0V
9
8
7
6
5
4
3
2
1
12
11
10
PIN
NO. VOLTAGE IC801
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
0V

15
14
13
47
46
45
41
40
39
38
37
36
35
34
33
44
43
42
18
17
16
50
49
48
21
20
19
53
52
51
23
22
55
54
26
25
24
58
57
56
29
28
27
61
60
59
32
31
30
64
63
62
PIN
NO. VOLTAGE PIN NO. VOLTAGE
0V
2.5V
2.5V
0V
0V
2.4V
4.1V
4.7V
0V
0V
5V
5V
2.5V
2.5V
0.9V
0.9V
2.1V
4.2V
0V
5V
9
8
7
6
5
4
3
2
1
12
11
10
PIN
NO. VOLTAGE IC802
0V
0V
1.5V
0V
2V
5V
0.3V
0V
2.5V
2.5V
0V
0V
0V
5V
0V
4.8V
5V
5V
0V
0V
2.5V
0V

41
40
39
38
37
36
35
34
33
44
43
42
15
14
13
47
46
45
18
17
16
50
49
48
21
20
19
53
52
51
23
22
55
54
26
25
24
58
57
56
29
28
27
61
60
59
32
31
30
64
63
62
PIN
NO. VOLTAGE PIN
NO. VOLTAGE
2V
0V
0.1V
2.2V
0V
2.5V
0V
2.5V
0V
0V
0V
4.1V
4.1V
5V
0V
2.7V
2.4V
0V
0V
0V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.2V
2.2V
0V
0V
5V
5V
4.8V
0V
5V
0V
0V
1.5V
2.4V
2.5V
2.5V
5V
0V
0V
0V
0V
0V
0V
5V
2.5V
0V
0V
0V
5V
4.7V
2V
0V
0V
2V
4.7V
0V
5V
2.3V

QT-CD111H/110H
– 13 –
MUTE
L802
0.68µH
CNS803 CNP803
BI803
SW702
PICKUP IN
M702
SLED
MOTOR
M701
SPINDLE
MOTOR
CNS801
BI801
1
CNS802
BI802
R833
5.6K
R835
470
C830
2P
(CH)
C833
0.001 R836
47K
C834
0.033
R832
56K C831
0.0027
R838
33K
R837
47K
C832
27P
(CH) R834
1K
C822
220P
IC804
BA5914FP
FOCUS/TRACKING/SPIN/SLIDE DRIVER
C844
330/10
R810
82K D802
1N4148
R849
100K
C851
0.022
C821
1/50
R827
220K
C846
330/10
Q804
S8050D
R877
220
C889
10/16
ZD801
MTZJ5.6B
R878
100
C887
0.022
R875
10K R876
10K
R873
100
C890
100/10
C867
10/16
R874
100
C868
10/16
XL801
16.93MHz
R880
100
C843
100/10 C873 0.01
L801
0.82µH
R860
1K
IC802
LC78623D
SERVO/SIGNAL CONTROL
C847
0.01
0.047
C842
27K
R857
1.2K
R856
C841
0.047
C802
47/16
R801
1K C801
0.01
C870
0.0022
C869
0.0022
R858
680
C850
0.1
C845
4.7/50
R871
4.7K
67 54321
6
5
4
3
2
1
6
5
4
3
2
1
6
5
4
3
2
1
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
3
1
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
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
26
27
28
29 30
1
21
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
15
16
33
34
33
34
35
36
37
38
39
41
40
42
43
44
45
46
47
48
49505152535455565758596061626364
47
48


0V
3.5V
3.5V
2.5V
2.5V7.4V
7.4V
0V
0V
2.7V
3.8V
3.2V
3.5V
3.5V
2.5V
0V
0V
0V
0V
2.5V
2.5V
+3.8V
-3.2V 0V
4.8V
7.4V
5.5V
+B
AUDIO GND POWER GND DIGITAL GND DIGITAL +7.4V L-CH R-CH
+B
+B
+B
+B
+B
+B
+B
LD
VR
PD
GND
FO–
FO+
TR+
TR–
PD
VR
LD
E
K
C
B
A
F
MON
LD
FO–
FO–
FO+
FO+
TR+
TR+
TR–
TR–
F
B
A
E
K
+B
+B
+B
+B
+B
+B
+B
+B
PU-IN
SL–
SL+
SP–
SP+
FO+
FO–
TR–
TR+
TR+ TR– FO– FO+
K
A
B
E
F
DEF
NC
T
BC
F
SC
G
ND
SLI
S
LC
F
S–
F
SM
C
V+
C
V–
L
OF
H
FL
T
ES
O
FF
JP–
SL+
TEST1
CS
TEST5
4.2M
16M
TST11
RES
CQCK
COIN
RWC
SQOUT
WRQ
FSX
SBCK
EFLG
SFSY
SBSY
PW
XVSS
XIN
XOUT
XVDD
MUTER
RVDD
RCHO
RVSS
LVSS
LCHO
LVDD
NC
MUTEL
TEST4
TEST3 DOUT C2F EMPH CONT5 CONT4 CONT3 CONT2 CONT1 VDD FSEQ PCK JP– JP+ TGL TOFF
TES
HFL
V/P–
CLV–
CLV+
TEST2
EMFIN
EMFO
Vss
FR
VVDD
ISET
VVss
PDO TAI
DEFI
GND
VO4–
VO4+
VIN4
VIN4'
BIAS IN
VCC
VCC
VIN3'
VIN3
VO3+
VO3–
OP IN +
OP IN -
OP OUT
GND
VO2-
VIN1'
NC
NC
GND
VIN2
VIN2'
VO2+
MUTE
VO1-
VIN1
VO1+
CD MOTOR PWB-B
P14 1 - E
TO MAIN SECTION
PICKUP UNIT
M
M
7
6
5
0
9
8
3
2
1
5
4
8
7
6
1
0
9
4
3
2
N
O
.VOLTAGE
2V
0V
0.1V
2.2V
0V
2.5V
0V
2.5V
0V
0V
0V
4.1V
4.1V
5V
0V
2.7V
2.4V
0V
0V
0V
Figure 13 SCHEMATIC DIAGRAM (2/4)
78 9101112
• NOTES ON SCHEMATIC DIAGRAM can be found on page 9.

QT-CD111H/110H
– 14 –
A
B
C
D
E
F
G
H
1234 5 6
Figure 14 SCHEMATIC DIAGRAM (3/4)
• NOTES ON SCHEMATIC DIAGRAM can be found on page 9.
<
R457
1K
R458
1K
CNP101
CNS101
SW102-H
SW102-C SW102-B
SW102-E SW102-D
SW102-A
SW102-G
SW102-F
C354 0.0056
(ML)
VC3
L3
AM BAR ANT.
TC3
L4
AM OSC.
T1
TC1
D1
1N4148
F1
B.P.F.
C2
0.001
L1
FM ANT.
C9
0.0047
C16
0.0047
R1
10
R7
390
R3
47
R9
22K
IC1
LA1186N
FM FRONT END
RF AMP.
C5
33P
(CH)
R2
33
C6
18P
(RH)
VC2
TC2
C8
4P
(CH)
R5
330K
C14
0.022
R6
820K
VC1
L2
C4
22P
(CH)
C37
220/10
C39
0.022
R8
3.9K
T2
R27
33K
C22
0.0039
C23 0.01
C38
0.022 C24
470P
C25
3.3/50 C27
3.3/50
R11
1.2K
VR1
6.8K
(B)
R29
15K
C28
0.0015
(Styrol)
R25
120
CF1
C29
10/16
R104
18K
R105
15K
C109
270P
C112
330P
C111
330P
R107
1K
C108
820P
C107
820P
R108
1K
C110
270P C114
47/16
R110
120
R455
6.8K
R456
6.8K
330
R101
330
R102
C35
1/50
SW201-B
CD
R103
18K
R229
10K
C352
220/10
47K
R353
C353
0.022
(ML)
R351
220
150
R352
J
8
L301
C351
0.0022
(ML)
C105
0.0018
R106
15K
C106
0.0018
R123
10K
R124
10K
220P
C11
C10
0.022
C15
0.022
IC2
LA1805
VC4
TC4
C46
2P
(CH)
C17
0.022
C21
0.022
C20
0.022
T3 CF2
C26
22/16
SW201-A
CD
R16
10K
R13
3.3K R14
3.3K
R15
10K
C33
1/50 C34
1/50
R38
1.8K
0.015
C32
C31
0.015
R17
68
C36
0.022
R121
1K
D103
1N4148
R122
1K
C123
100/10
C121
0.01
C122 0.01
D101
1N4148
D102 1N4148
D202
1N4148
R120
3.3K
R119
3.3K
C119
2.2/50
C120
47/16
R125
680K
R118
3.9K
C115
0.018(ML)
C117
10/16
R117
3.9K
R115
3.9K
R113
8.2K
C118
10/16
R116
3.9K
R114
8.2K
IC101
BA3311L
REC./P.B.
EQUALIZER AMP.
C113
47/16
C116
0.018
(ML)
R109
120
4
4
33
22
1
1
12
123
1
23 4
56
7
89
123 45
6
7
8910 11
131415161718192021222024
2
58
9
10
11

TAPE
RECORD/PLAYBACK
HEAD
NC
2
3
1
3
2
1
VCO
OSC
MIX
AUTO
AUTO
FM BAND
COVERAGE
fH
fL
AM
TRACKING
fL
fH
AM BAND
COVERAGE
fH fL
fHfL
FM
TRACKING
P
P
R
FM DET
FM OSC.
FM IF
ALC T
FILTER
VCC
GND
NF1
NF2
IN2
IN1
OUT2
OUT1
AM
OSC
STB
AM RF
+B
FM
DET
AM
OUT
AM IN
MPX
IN
MO/ST
VCO
AM/FM
GND
AM IF
AGC
AM MIX
FM IF IN
R-CH L-CH
R
P
R
RP
TAPE
AM
AM
FM
FM
POWER GND
DIGITAL GND
CD +7.4V
L-CH
AUDIO GND
R-CH
MUTE
AM IF
MPX VCO
CK 76kHz
PP
P
P
R
R
R
R
TAPE
L-CH
R-CH
ERASE HEAD
ROD ANTENA
PRE AMP
DET
OUT
P13 7 - H
TO CD SERVO/
DISPLAY SECTION
6
7
5
4
3
2
1
1
3
46712
FM/AF IF MPX.
9
8
7
6
5
4
3
2
1
PIN
NO. VOLTAGE
IC1
0.9V
1.6V
6.8V
0V
0V
6.8V
1.4V
6.2V
6.8V

QT-CD111H/110H
– 15 –
11.83V
0V
8V
<3V>
<0.7V>
<0.1V>
1
1
5
5
HEADPHONES PWB-A4
SW102-G
C354 0.0056 (ML)
CNP201
CNS201
SW203-A
SW203-B
1N4148
D309
1N4148
D308
C302
0.022
C301
0.022
IC203
KIA7808P
VOLTAGE REGULATOR
VR201-A 20K (B)
VR201-B
20K(B)
C218
0.0039
R220
3.3K
C217
0.0039
R219
3.3K
C352
220/10
Q351
S8050D

R354
10
47K
R353
C353
0.022
(ML)
R351
220
150
R352
J6
82
C221
0.001
C223
100/10
C229
100/10
C233
1000/10
FW202
C227
3300/25
C228
1/50
C226
0.022
D201
1N4148
IC202
LA4597
POWER AMP.
C222
0.001
C225
220/25
C224
100/10
R215
2.2K
R216
2.2K
C213
0.1
C214
0.1
C230
100/10
SW201-D
C234
1000/10
C232
0.1
(ML)
C231
0.1
(ML)
SW201-C
SP502
SP501
M601
SW601
C654
0.022 C651
0.022
D651
1N4004
D652
1N4004
C652
0.022
C653 0.022
D654
1N4004
D653
1N4004
T601
POWER TRANSFOMER
SO651
CNP602
CNS602
R222
1K
R221
1K
R227 120
C219
0.047
(ML)
C220
0.047
(ML)
C216
0.039(ML)
C215
0.039
(ML)
C304
0.15/50
C303
0.15/50
3
2
1
1
2
3
4
5
6
7
8
9
10
11
12
13
M
1
2
3
1
2
3
1
22

R228
120
J201
HEADPHONES
R225
100K
R223
4.7K
Q201
2SC1815GR Q202
2SC1815GR
R224
4.7K
R304
1.8K
R302
1.8K
+B
+B
+B
BATTERYS
DC12V["D"size(UM/SUM-1,
R20 or HP2)battery x 8]
+B
+B
+B
+B
R-CH L-CH
SPEAKERS
–
–
+
+
VOLUME
(241-7)
MAIN
(241-6)
TAPE
MOTOR
TERMINAL PWB-A3
X-BASS
RP
TAPE
AM
FM AUTO
CD
CD
FM AUTO
AM
TAPE
–
+
OUT IN
X
VCO
7
6kHz
AC INPUT
MAIN PWB-A1(1/2)
RECORD SIGNAL
PLAYBACK SIGNAL
CD SIGNAL
FM SIGNAL
AM SIGNAL
1
9
8
7
6
5
4
3
2
1
12
11
10
PIN
NO. VOLTAGEIC2
1.6V
1.6V
6V (6.3V)
0.2V (0.7V)
1.6V
0V
0V
0V
2.5V
2.5V
5.1V (6.6V)
0.8V (1V)
21
20
19
18
17
16
15
14
13
24
23
22
PIN
NO. VOLTAGE
1.2V (0V)
1.9V (1.6V)
1V (1.3V)
1.7V
1.5V (1.7V)
1.5V (1.5V)
0.4V (0.4V)
6.1V (6.4V)
6.1V (6.4V)
1.6V
1.6V
1.6V
( ): AM
< >: Recording
[ ]: Play
9
8
7
6
5
4
3
2
1
12
11
10
PIN
NO. VOLTAGE
IC101
<0V> [3.23V]
<0V> [0V]
<0.6V> [0.6V]
<0V> [0V]
<0V> [0V]
<0V> [0V]
<0V> [0V]
<7.43V> [7.43V]
<0V> [0V]
<7.37V> [7.37V]
<0.6V> [0.6V]
<3.3V> [3.3V]
9
8
7
6
5
4
3
2
1
13
12
11
10
PIN
NO. VOLTAGE
IC202
0.1V
0V
11.2V
0V
11.3V
0V
0.1V
12V
10.4V
5.8V
0V
5.8V
10.4V
78 9101112
Figure 15 SCHEMATIC DIAGRAM (4/4)

QT-CD111H/110H
– 16 –
Figure 16 WIRING OF P.W.BOARD (1/2)
A
B
C
D
E
F
G
H
1234 5 6
• The numbers 1 to 12 are waveform numbers shown in page 18.
123456789
10
11
12
BK
WH
WH
WH
WH
BR
GY
GY
GY
GY
GY
BR
BK
BK
BK
BK
BK
BK
BK
B
A
VOLUME
AB
CD
SW203
X-BASS
A
B
SW201
FUNCTION
FM AUTO AM TAPE
OFF
POWER
CD
ON
3
2
1
1 2 3
1
2
3
L3
AM BAR ANTENNA
TC1 TC2
TC3 TC4
VC4
VC3
VC2
VC1
MAIN PWB-A1
R228
R227
FW202
FW202
1
5
1
5
J201
HEADPHONES
J6
C108
C110
C848
C844
C843
C867
C873
C889
C846
C819
C817 C818
C231
C229
C120
C119
C123
C234
C122
C118 C114
C112 C111
C109
C113
C107
C116 C106
C352
C354
C105
C117
C222
C221
Q202
C220
C219
C223 C224
C704
C216
X701
XL801
C868
C890
C213
C214
C217
C218
C226
C233
C232
C887
R229
C215
Q804
Q351
C820
C869
C870
C705
C301
C302
C121
C230
C225
C701
C702
C115
C351
C353
R102
R108
R110
R840
R810
R877
R878
R824
R825 R124
D103
R118
R109 R101
R107
R116
R105
D101
R117
R458
L802
R874
R304 C304
C303
R216 R215
R222
R221
R123 R119
R842
R830
R714
R219
R115
R121 R113
R776
R772
R773
R774
L801
ZD801
R457
R456
R455
R708
R715
R736 R724
R727
D201
D202
R302
R771
R822
R823
R839
R831
R873
R880
R875
R876
R713
R709
R711
R710
R220
R351
D102
R125
R104
R103
R120
R114 R106
R354
1
2
R353 R352
R122
IC802
SW102
CNP101
IC101
IC202
FW701
CNP201
LCD701
1
2
3
4
5
6
7
8
BI801
C227
L301
CNP602
IC203
SW774 SW773
SW772
STOP
SW771
PLAY
VR201
1
7
29
30
8
14
15
21
22
28
IC804
C807
C35
C27
C34
C15
C14
C29
C11
C46
C36
C22
C24
C25
C23
C37
C8
C5
C6
C33
C32
C17 C20
C26
C21
C837 C845
C850
C840
C802
C801
C803
C804
C806
C814
C812
C816
C832
C741
Q740
Q805
CF1
C38
C10
C39
C9
C4
C28
C31
C2
C16
C838
C839
C847
C841
C833
C851
C810 C815
C811
C849
C809
C808
C813
C805
C831
C830
C822
C740
C834 C842
C835
C821
R808
R811
R809
R829
R806
R807
R15
R13
R16
R14
R11
R29
R8
R27
R1 R2
R7
R9
R3
R802
R871
R801
R805
R827
R826
R814
R817
R832
R833
R745
R744
D741
R743
R25
R6
D1
R5
R38
D308
D309
R721
R730
R734
R17
R849
R836
R838 R857
R856
R816
R834
R835
R837
R803
R804
R812
R813
R815
R828
R819 R820 R821
R858
R860
D740
R740
R741
R742
R725
R716
R718
R735
R733
R719
R732
R720
R731
R722
R729
R723
R728
R726
D802
IC801
1
123456789
FW701
CNS802
BI802
IC2
VR1
L1
T2
L4
L2
F1
T1
T3
BI803
CNS803
IC701
IC1
CF2
1
1
2
3
4
5
1
2
3
4
5
6
1
2
3
4
5
6
5
123456789
101112
15141318 1716
21 20 19 24 23 22
123456789
10 11 12 13
1
3
3
5
10
15
20
25
30
48
49 50
55
60
35
40
45
HEADPHONES PWB-A4
CD LID
OPEN/CLOSE
SW761
SWITCH PWB-A2
CNS801
7
8
16
123 1234
P.B REC
1
2
3
64 1
17
16
33 32
5
10
15
20
25
30
48
49 50
55
60
35
40
45
64 1
17
16
33 32
BK
BK
TRACK UP/CUE
TRACK DOWN/
REVIEW
2
3
4
5
1
7
8
9
6
11
10
12
5
10
15
20
25
30
48
49 50
55
60
35
40
45
64 1
17
16
33 32
18
C
A
E
B
H
D
G
F
VCO
COR1
E
C
B
B C E
E C B
E C B
B C E
E C B
Q201
R223
R224
C228
R225

QT-CD111H/110H
– 17 –
Figure 17 WIRING OF P.W.BOARD (2/2)
78 9101112
F3895AF
F651
T1.25A L 250V
C653
C651
C654
C652
D652
D653
D654
D651 CNS602
SPEKERS
SP502 SP501
L-CHR-CH
FM ROD ANTENNA(213)
BK
BK RD WH
RECORD/PLAYBACK
HEAD(241-4)
ERASE HEAD
(241-5)
TAPE
BK
CNS101
BK
WH
RD
BK
4
3
2
1
BR
COLOR TABLE
RD(R)
OR
YL
GR
BL
VL
GY
WH(W)
BK
PK
BROWN
RED
ORANGE
YELLOW
GREEN
BLUE
VIOLET
GRAY
WHITE
BLACK
PINK
T601
POWER
TRANSFORMER
(236)
(211)
BATTERYS
DC12V["D"SIZE(UM/SUM-1,
R20 or HP2)battery 8]
+
YL
TAPE MOTOR
(241-6)
M601
TAPE MAIN
(241-7)
SW601
CNS201
1
2
3
WH
BK
RD
2
1
+
-
+
-
SPENDLE MOTOR
PICKUP IN
M701
SLED MOTOR
M702
CNP803
SW702
1
2
3
4
5
6
54321
78 654321
PICK UP UNIT
CD MOTOR PWB-B
TERMINAL PWB-A3
BR
RD
RD
OR
OR
SO651
AC SOCKET
AC 230-240V
50Hz

QT-CD111H/110H
– 18 –
WAVEFORMS OF CD CIRCUIT
1
1
3
5ms
0.50 V
IC801 20 F.E
1
5ms
5.0 V
IC801 54 DRF
STOP PLAY
FOCUS SERCH
2
0.5ms
1.00 V
HF
0.5ms
5.0 V
HFL
0.5ms
5.0 V
TES
1
2
3
CUE
4
5
3
0.5ms
1.00 V
H.F
1
2
3
0.5ms
5.0 V
HFL
0.5ms
5.0 V
TES
REVIEW
4
5
3
0.5ms
10.0 V
JP+
0.5ms
10.0 V
JP-
0.5ms
0.50 V
JP
0.5ms
1.00 V
TE
6
7
9
8
6
7
9
8
50ms
10.0 V
JP+
CUE
50ms
10.0 V
JP-
50ms
0.50 V
JP
50ms
1.00 V
TE
6
7
9
8
6
7
9
8
11
10
11
10
12
12
REVIEW
50ms
10.0 V
JP+
50ms
10.0 V
JP-
50ms
0.50 V
JP
50ms
1.00 V
TE
0.5ms
10.0 V
JP+
0.5ms
10.0 V
JP-
0.5ms
0.50 V
JP
0.5ms
1.00 V
TE
PLAY
20ms
1.00 V
SPO NORMAL DISC
TN0=01
20ms
2.00 V
CLV+
PLAY
TCD-712 (140mm)
TN0=01
50ms
1.00 V
SPO
50ms
2.00 V
CLV+
PLAY
TCD-712
5s
100mV
SLD
1
0.5s
100mV
SLD
1

QT-CD111H/110H
– 19 –
TROUBLESHOOTING (CD SECTION)
When the CD does not function
When the CD section does not operate When the objective lens of the optical pickup is dirty,this section may not operate.Clean
the objective lens,and check the playback operation.When this section does not operate even after the above step is taken,check
the following items.
Remove the cabinet and follow the troubleshooting instructions.
"Trackskippingand/ornoTOC(TableOfContents)maybecausedbybuildupofdustotherforeignmatteronthelaserpickuplens.
Before attempting any adjustment make certain that the lens is clean. If not, clean it as mentioned below."
Turn the power off.
Gently clean the lens with a lens cleaning tissue and a small amount of isopropyl alcohol.
Do not touch the lens with the bare hand.
See if the pick-up is in the pick-up in SW702 position.
If the items mentioned above are OK, check the main
microcomputer IC701.
Yes
Yes
• The CD function will not work.
The CD operating keys don't work.
Check the CD, DPS microcomputer (IC701), power supply, 4.19
MHz and 16.93 MHz clock, and reset terminal.
Check the waveform of SCK, SO (DATA) and SI (COMM).
Yes
Yes
Playback can be performed without a disc.
Yes
Doesthe outputwaveform of IC801(16)(FD) match that shown in
Fig. 19? Check the area around IC804-BI801/CNS801.
Yes
Check the IC801(50)(CLK) line, 4MHz.
Check the microcomputer data on pins (51)(CL), (52)(DAT) and
(53)CE.
Figure 19
• The CD operating keys work.
No
Yes
No
Does the pick-up move up and down twice? Focus search OK.
Focus search
is performed
two times
when play
operation is
done without
disc.
0.5s
0.50 V
IC801 16 FD
2
1
0.5s
0.50 V
IC801 15 TD
Check the Focus - HF system.

QT-CD111H/110H
– 20 –
Check the laser diode driver.
• Playbackcanonly be performed when a disc
is loaded.
Does the DRF signal change from "L" to "H"? No If the disc is not turning, the DRF
should not change to "H".
Is HF waveform normal (see the Fig. 20-1, 2)?
Yes
Is the Focus servo active? (Can you hear it working?) No Check the area around IC801(16) - (21) (focus servo circuit).
Level is abnormal. Check the periphery
of IC801 pins 41 and
42.
No
Waveform is unstable. Check the spin
system.
Yes
Yes
Yes
Yes
Yes
Figure 20-2
Figure 20-1
Check the spin
system.
HF
0.1V/DIV
0.5µsec/DIV(DC)
(When playing
back the disc)
Waveform in case
of normal play-
back
3
2
1
4
0.5s
1.00 V
IC801 16 FD
0.5s
10.0 V
IC801 12 CLV+
0.5s
10.0 V
IC801 54 DRF
0.5s
2.00 V
IC801 7 TE
Check the tracking system.
▼
▼
▼
• Check the tracking system.
Check waveform of IC801 pin 7 (TE).
Check the periphery of IC801
pin 8 to pin 15, and IC804 to
BI801/CNS801.
Tracking servo is inoperative.
The waveform shown in Fig. 20-3
appears, and no-disc state appears
soon. Yes
Yes
Yes Yes
Play is possible in
TEST mode. Although IL is possible,
play is impossible. Normal jump is impeded, and the
program top cannot be reached. Check the periphery of
IC801 pin 14.
Yes
Data cannot be read. Check the VCO-PLL system.
Yes
3
4
5ms
1.00 V
IC801 7 TE
5 ms
5.0 V
IC801 54 DRF
Figure 20-3