Sharp QT-CD700W User manual

QT-CD700W
QT-CD700W
SERVICE MANUAL
SHARP CORPORATION
CONTENTS
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
MODEL
PORTABLE CD STEREO SYSTEM
• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.
PAUSE STOP/EJECT
STOP
F.FWD
UP/
F.FORWARD
REWIND PLAY RECORD
REPEAT
PLAY/
PAUSE
MIC
DOWN/
F.REVERSE
PROGRAM
POWER FM ST
RANDOM
Page
AC POWER SUPPLY CORD AND AC PLUG ADAPTOR................................................................................................ 2
SPECIFICATIONS............................................................................................................................................................ 3
NAMES OF PARTS.......................................................................................................................................................... 4
FITTING OF DIAL POINTER ........................................................................................................................................... 5
OPERATION MANUAL..................................................................................................................................................... 6
DISASSEMBLY................................................................................................................................................................. 7
ADJUSTMENT................................................................................................................................................................. 10
NOTES ON SCHEMATIC DIAGRAM.............................................................................................................................. 15
WAVEFORMS OF CD CIRCUITS ................................................................................................................................... 22
TROUBLESHOOTING (CD SECTION)...........................................................................................................................24
FUNCTION TABLE OF IC ...............................................................................................................................................29
PARTS GUIDE/EXPLODED VIEW

QT-CD700W
2
SAFETY PRECAUTION FOR SERVICE MANUAL
zThis product is classified as a CLASS 1 LASER PRODUCT.
zWARNINGS:
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. So 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 adjustment, or performance of procedures other than those specified
herein may result in hazardous radiation exposure.
92L24801600292
92L24801800222
92L2680212512A
92L26803000010
AC POWER SUPPLY CORD AND AC PLUG ADAPTOR

QT-CD700W
3
CHAPTER .
QT-CD700W
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
■General
SPECIFICATIONS
Power source AC 110-127/220-240 V, 50/60 Hz
DC 12 V ["C" size (UM/SUM-2, R14) battery x 8 ]
Power consumption 12 W
Output power PMPO: 32 W (AC operation, 10% T.H.D)
RMS: 4 W (2 W + 2 W) (DC operation, 10% T.H.D)
Speakers 77 mm (8 Ω) full range x 2
piezo x 2
Dimensions Width: 295 mm (11-5/8")
Height: 153 mm (6")
Depth: 213 mm (8 - 3/8")
Weight 2.1 kg (4.6 lbs) without batteries
■Radio
Frequency range FM:88-108MHz
AM: 526.5 - 1,606.5 kHz
■Tape recorder
Frequency response 60 - 12,000 Hz (Normal tape)
Signal/noise ratio 40 dB
Wow and flutter 0.3% (WRMS)
Motor DC 9 V electric governor
Bias system AC bias
Erase system Magnet erase
■Compact disc player
Type Compact disc
Signal readout Non-contact, 3-beam semiconductor laser pickup
Audio channels 2
Filter 8 time over sampling 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.

QT-CD700W
4
Names of parts
1
16
17
18
19
20
21
239
10
11
12
13
14
45 678
15
22
1. Function Switch
2. Volume Control
3. (Tape) Pause Button
4. (Tape) Stop/Eject Button
5. (Tape) F.Forward Button
6. (Tape) Rewind Button
7. (Tape) Play Button
8. (Tape) Record Button
9. CD Compartment
10. Tuning Control
11. Band Selector
12. (CD) Random Button
13. (CD) Stop Button
14. (CD) Track Up/F.Forward Button
15. (CD) Repeat Button
16. Cassette Compartment
17. LCD Display
18. (CD) Program Button
19. (CD) Track Down/F.Reverse Button
20. (CD) Play/Pause Button
21. Built In Microphone
22. FM Aerial
23. Battery Compartment
24. Earphone socket
25. AC Voltage Selector
26. AC Input Socket
27. Beat Cut Switch
23
24
25
26
27
A
BEAT CUT
B
110V-
127V
VOLTAGE SELECTOR
220V-
240V

QT-CD700W
5
FITTING OF DIAL POINTER
Setting method of dial pointer
1) Remove the front cabinet.
2) Remove 3 pcs screws (S06) φ3 x 10 PA from tuning bracket (bottom of PWB board/pattern side), and remove 1 pc screw (S14) φ2.6 x 10 PH from
tuning bracket/CD compartment’s flange (with fitting between CD compartment and tuning bracket).
3) Remove dial pointer.
4) Insert dial pointer from A direction to tuning bracket, then engages the dial pointer’s guide hook into tuning control’s slot properly B. (Ensure
tuning control’s pin located on adjustment portion of tuning bracket.)
5) Reassemble the screws and front cabinet.
Dial Pointer
Dial Pointer
Main PWB
Main PWB
Variable Capacitor Variable Capacitor
Tuning Knob
A
Tuning Knob
Tuning Knob
Tuning Bracket
Adjustment
Portion
Pointer
(S06)×3
φ3×10PA
(S14)×1
φ2.6×10PH
This screw fitting between
CD compartment and
tuning bracket.
B

QT-CD700W
6
OPERATION MANUAL
1Preparation for use
2 Listening to a CD
4 Listening to a Cassette Tape
3 Listening to the Radio
5
Recording from a CD
■
● 8 "C" size batteries (UM/SUM-2, R14)
● Batteries are not included.
Turning the power
ON and setting to
the STAND-BY
mode
■
Operation with batteries
1
123 1 2 3
23 45
12 3 4 5
PLAY/
PAUSE
AC110-127/220-240 V,
50/60 Hz
To an AC socket
To AC INPUT
FUNCTION
TAPE (STAND-BY)
CD RADIO
FUNCTION
TAPE (STAND-BY)
CDRA
DIO
FUNCTION
TAPE (STAND-BY)
CD RADIO
AM FM FM ST
FUNCTION
TAPE (STAND-BY)
CDRADIO
FUNCTION
TAPE(STAND-BY)
CD RADIO
PLAY/
PAUSE
PLAY
RECORD
TUNING

QT-CD700W
7
DISASSEMBLY
Screw....S04x6
5 Tape Mechanism Screw....S06x4
1 Rear Cabinet Screw.....S08x5
Screw.....S06x2
Screw.....S06x2
Screw.....S06x4
2 Front Cabinet
3 Main PCB ASS'Y
Screw.....S06x7
Screw.....S02x1
Screw.....S15x1
4 CD Control PCB ASS'Y
R/P PCB ASS'Y Screw.....S06x2
7 CD Mechanism Screw.....S11x4
Figure 5-2
Figure 5-1
8 Power PCB ASS'Y Screw.....S02x1
6
5-2
5-1
5-1
6-1
5-2
6-1
6-2
5-2
STEP REMOVAL PROCEDURE FIGURE
CD Door
Front
Cabinet
Rear
Cabinet
(S06)×2
φ3×10PA
(S08)×2
φ3×14PA
R/P PCB ASS'Y
(S06)×2
φ3×10PA
(S06)×4
φ3×10PA
TAPE MECHANISM
S04X6
CD CONTROL PCB ASS'Y
OPEN CASSETTE HOLDER
Caution On Disassembly
Follow the below-mentioned notes when disassembling the unit and reassembling, 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 integraged circuits and other circuits when servicing.

QT-CD700W
8
Figure 6-1
Figure 6-2
FUNCTION KNOB
FUNCTION KNOB BKT
(S05)X1
φ3X8mm
(S05)X1
φ3X8PWH
CD MECHANISM
MAIN PCB ASS'Y
POWER PCB ASS'Y
BATTERY DOOR
TOP CABINET
CD DOOR
(S12)X1
φ3X8PA
(S14)X1
φ2.6X10PH
BAND KNOB
BAND KNOB BKT
DOOR LATCH SWITCH
TUNING BRACKET
(S02)X1
φ2.6X5PH
TUNING KNOB
(S06)X7
φ3X10PA
RUBBER CUSHION X4
VOLUME KNOB
BRACKET
(S15)X1
M3X8PH (BLACK)
(S11)X4
φ2.6X12PWA
(S03)X1
φ3X8PH
HANDLE
TRANSFORMER
(S09)X2
φ3X20PWH
AC POWER
SOCKET (S06)X2
φ3X10mm
(S13)X2
φ3X12PA S06X2
AC VOLTAGE
SELECTOR COVER
AC VOLTAGE SELECTOR
NOTE:
After removing the connector for the optical pickup from the
connector, wrap the conductive aluminium foil around the
front end of connector remove to protect the optical pickup
from electrostatic damage.

QT-CD700W
9
(S09) X 2
φ3x20PWH
Black wire
Bluewire
Red wire
Red wire
Left
Terminal
Left
Terminal
Right Terminal
Center Terminal
Screw
VOLTAGE
SELECTOR
220-
240V
110-127V
POWER
TRANSFORMER
screw
(S06)x2 φ3x10PA
Right terminal
To
Batterry
AC INPUT
SOCKET
screw
Black wire
To PWB Board
(Power)
screw
(S13)x2 φ3x12PA
The wire arrangement of AC Input Socket, Voltage Selector & Power Transformer.
* Please follow the instruction of wire arrangement, to service or reinstall these critical parts.
1
1
2
3
4
1
BLACK WIRE
Connecting from Power Transformer (black wire) to AC Input Socket (left terminal).
2RED WIRE
Connecting from AC Input Socket (right terminal) to Voltage Selector (center terminal).
3RED WIRE
Connecting from Power Transformer (red wire) to Voltage Selector (left terminal).
4BLUE WIRE
Connecting from Power Transformer (blue wire) to Voltage Selector (right terminal).

QT-CD700W
10
ADJUSTMENT
MECHANISM SECTION
Torque Specified Value
Play: TW-2412 Over: 80g
Torque Check
Torque Meter Specified Value
Play TW-2111 30 to 60g.cm
Fast Forward 55 to 140g.cm
Rewing: TW-2231 55 to 140g.cm
Head Azimuth
Torque
MT-114
Specified Value
Output: Speaker terminal
CN6 Load resistance: 8 ohms
Tape Speed
Test Tape
MTT-111
Adjusting
point Specified
Variable
Resistor in
MOTOR.
M601
3.000±90Hz
Instrument
Connection
Output: Speaker
Terminal CN6
Load resistance:
8 Ohms
Tape Section
Position of each switch or control
Volume control
Function switch
Max
Tape/Stand-by
Adjustment point
T101
Specified Value Instrument
Connection
80KHz ± 6KHz Pin 1 CN103
TUNER SECTION
fL : Low-range frequency
fL : High-range frequency
FM IF /RF
Test Stage Specified Value/
Adjusting Point
Specified Value/
Adjusting Point
Instrument
Connection
FM
Band Coverage
fL : L301
fL : C2
FM Tracking fL : 90 MHz: L303
fH: 106.0 MHz: C1
AM IF /RF
Test Stage
AM IF
AM
Band Coverage
AM Tracking
Instrument
Connection
T303
Input: Antena
Output: Pin 18
of IC1
fL: T301
fL: C4
fL: 600KHz ANT
fL: 1400KHz C3
Input: Antenna
Output: Speaker
Terminal CN6 Load
resistance: 8 ohms
Playback Amplifier Sensitivity Check
Test Tape Specified Value Instrument Connection
MTT-118 1.5V ± 3dB Speaker Terminal
(Load resistance: 8 ohms)
Input: Antenna
Output: Speaker
Terminal (CN6
Load resistance:
8 ohms

QT-CD700W
11
TAPE LEAF SW
WH
WH
RD
BK
MOTOR
M601
TAPE
MECHANISM
Variable resistor
in motor
PHONE
SW3
IC3
CN1
SW1
VR1
t101
BIAS OSC
SW2
CN103
IC101
Figuer 11 ADJUSTMENT POINTS
IC201A
FM TRACKING
FM ROD ANTENNA
FM-ANT
ANT
AM BAR
AM ANTENNA
AM IF
T303
12
IC1
1
13 18 24
L303
T301
PVC1
L301
C3
C4
C1
C2
FL FH
SW4
FL FH
FM BAND COVERAGE
FL
FH
AM TRACKING
FL
FH AM COVERAGE
1234
A
B
C
D
E
F
G
H
654321

QT-CD700W
12
CD SECTION
Since this CD system incorporates the following automatic adjustment function, when the pickup is replaced, it is not necessary tp readjust it.
Since this CD unit does not need adjustment, the combination of PWB and laser pickup unit is not restricted.
TEST MODE
LCD MODE
LASER LIGHTING CONFIRMATION
1. Remove the front cabinet according to the disassembly method.
2. Short the TP of the Figure 13-1 to turn on the CD DOOR switch (SW810).
3. While holding down the "Stop" and "RANDOM" button simultaneously, move the FUNCTION switch to "CD".
4. Open the CD DOOR and press the PLAY button. The laser lights up for a few seconds. (During this time, the pickup lens moves up and down and
adjusts the focus to check if there is a disc or not.)
PREPARATION FOR LASER LIGHT UP
1. Before the laser light up, CD DOOR switch (SW810) terminals have to be short with the solder. Resistor of 330ohm is put from 13 PIN of IC201A,
and you must connect it to GND of PWB. (Refer to PWB of Figure 13-1.)
Start While holding down the “Stop” and “RANDOM” button simultaneously, move the FUNCTION switch to “CD”.
Note 1. When the CD DOOR switch is in the OFF position, i.e. CD DOOR is opened, the unit is now in test mode. Press the “UP/
F.FORWARD” and “DOWN/F.REVERSE” buttons to move the pickup back and forth.
2. The LCD display should be the same as it is for normal CD operations.
Operation Pressing the “UP/F.FORWARD” button will move the pickup outward.
Pressing the “DOWN/F.REVERSE” button will move the pickup inward.
Start After connecting the 10kohm resistor between IC201A 13 pin and GND, holding down the “Stop” and “RANDOM” button
simultaneously and move the FUNCTION switch to “CD”.
Display
1 ALL
PROG
RNDM

QT-CD700W
13
Figure 13-1
A
B
C
D
E
F
G
H
654321
ECB
ECB
ECB EC B
12
D3 D506
D2
C
CN8
CN5
CD DOOR
12
4
56789101112
OPEN/CLOSE
CD LID
SW810
Q4
C5O4A
C515
CN502B
PLAY
S4
Q5
C525
D505
CN503A
RD BK
12
CN5A
TP
E
C
B
D4
Q50
2
Q1
C126A
54
59
48
42
33
38
C133A
49
64
1
5
C108A
C104
C610
10
GND
16
13 17
22
26
32
P19
IC201A
CN124A

QT-CD700W
14
SETTING METHOD FOR LASER LIGHT UP
SETTING FOR MAXIMUM LASER POWER
Pickup unit
Variable resistor
VR1A
Note:
The TEST mode is cleared by power OFF.
After CD initialize finish, The CD TEST mode is set, and the LCD indicate to the total tracks of the disc .
Release the PLAY button.
The CD TEST mode is set when the LCD indicate to "1".
Then out the above circuit.
The laser is light up when LCD indicate to "CD".
1. In power OFF state, set the Function switch to ON, keeping to be pressed the "Stop" and "RANDOM" button at same time.
2. In above TEST mode state, press once the PLAY button.
1. In above laser light up state, adjust the variable resistor (VR1A) on pickup PWB to maximum laser power.
Maximum laser power: Rotate the variable resistor (VR1A) to clockwise.

QT-CD700W
15
NOTES ON SCHEMATIC DIAGRAM
•Resistor:
To differentiate the units of resistors, such symbol as K and M are
used: the symbol K means 1000 ohm and the symbol M means
1000 kohm and the resistor without any symbol is ohm-type
resistor. Besides, the one with “Fusible” is a fuse type.
• Capacitor:
To indicate the unit of capacitor, a symbol P is used: this symbol P
means pico-farad and the unit of the capacitor without such a
symbol is microfarad. As to electrolytic capacitor, the expression
“capacitance/withstand voltage” is used.
(CH), (TH), (RH), (UJ): Temperature compensation
(ML): Mylar type
(P.P.): Polypropylene type
• Schematic diagram and Wiring Side of P.W.Board for this model
are subject to change for improvement without prior notice.
• The indicated voltage in each section is the one measured by
Digital Multimeter between such a section and the chassis with no
signal given.
1. Tuner
( ): AM mode
: FM mode
2. CD
( ): Stop state
: Play mode
3. Deck section
: 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.
TYPES OF TRANSISTOR
ECB
FRONT
VIEW
2SA933
DTA124ESA
2SB1237
EBC
FRONT
VIEW
9014
9015
8050
REF NO. DESCRIPTION POSITION
SW2 Record/Playback Rec P. B
SW1 Function selector Radio-Tape CD
SW4 Band selector FM. ST-FM-AM
SW3 Beat cancel A-B
SW601 Tape man OFF-ON
SW651 Voltage selector AC220-240V
SW702 Pickup in AC110-127V
S4 Play/Pause OFF-ON
S3 Stop OFF-ON
S1 DOWN/F.REVERSE OFF-ON
S2 UP/F.FORWARD OFF-ON
S6 Repeat OFF-ON
S5 Program OFF-ON
S7 Random OFF-ON

QT-CD700W
16
Figure 15 SCHEMATIC DIAGRAM (1/4)
FM ANTENNA
D301
1N4148 D302
1N4148
C328
33P
C316
130P
R11
4.7
L301
2T5/5MM
L303
3T5/4.5MM
C302
25P
C301
25P
C324
203
VC1A
VC1C
IC1 TA2111N
VOLTAGE(V) VOLTAGE(V)
(0.8)0V
(0.48V)1.37V
(1.25V)1.24V
(1.25V)1.26V
(4.28V)4.52V
(3.47V)4.52V
(0.7V)0.7V
(0.9V)1.1V
(0.19V)1.36V
(4.28V)4.53V
(4.3V)4.52V
(4.28V)4.52V
(4.28V)4.52V
(4.28V)4.52V
0
U1
1 2 3
12
11
10
9 8 7 6 5 4
24 23 22 13
FMST-
FMST+
14 15 16 17 18 19 20 21
88-108
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
pin
no pin no
0
0
(3.5V)4.49V
(0.6V)0.5V
(3.7V)4.5V
(3.4V)3.84V
(4.17V)4.52V
(2.75V)3V
(3.5V)3.95V
VC1B
VC1D
C325
33P
CF2
455K CF3
10.7M
R12
220
R304
330
R311
330
C2
100U
C3
203
R3
10
R310
100
R77
10K
R78
10K
R506
10K
Q501
9014
R507
10K
D3
1N4148
D5
1N4148
R505
100K
Q502
9014
C4
470U
C303
1U
C305
0.1U
Q2
9014
6.12V
0.21V
0.23V
0V
0V
0V0V
5.43V
C307
1u
R312
4K7
R308
10K
R309
10K
C327
203
10.7M
CF303
C306
1u
R325
47k
T303
C322
4.7u
R302
180K
C323
104
C102
100U
C121
47U
R112
2K2
R110
47K
MIC
L
LL-CH
R-CH
TAPE
R
RP-HEAD
TAPE MOTOR
TAPE LEAF
SWITCH
CN103
CN15 CN15A
CN7B
2
122
1
1
3
CN7A SW3
CN14A CN14
1
2
1
2
CN103A P
1
12
CN503B CN503A
REC-SYN
11
10
9
8
7
6
5
4
3
2
1
12
11
10
9
8
7
6
5
4
3
2
1
2
3
4
5
6
7
8
9
P
R
R
P
R
P
R
P
4.75V 0.1V
0.68V
0.1V
0.1V
0.68V
0V 0V
0.6V
R
P
R
R109
2K2
R108
1K
R129
15K
R104
560
R105
560
C109
222(M)
C129
182M
C130
1u
R122
47
R121
120K
C128
100u
C106 100u
C105 203
R17 100K
C122
22U
C126
47u
C123
333(M)
R125
5k6
R141
2K2
C125
1u
C124
1u C124
120K
C142
200p
R117
5k6
IC101
REC/P.B.
EQUALISER AMP
BA3308
C141 200p
R107 3K3
R314 300
C320 104
C100 562 C200 562
R306 3K9
R307 3K9
CC5 103M
C309 103M
C312 103M
C317 203
D1 4V3
C318 100u
AM
FM
ST
SW4
C304 4P
C321 203
R315 0.1U
C132
1u
C127
182M
C101
203
C110
222(M)
C133
182(M)
R113
15K
R128
470K
R126
47
R101
100
R118
100
R127
10K R20 22
R111
10K
C103
203
M501
SW502
M
Q101
9014
Q102
9014
C136
100u/25V
C143
180P BIAS COIL
AC BIAS
BEAT CUT SWITCH
E-HEAD
Q103 8050D
RECORDING
BIAS OSCILATOR
T101
PL1004 R119
10
C135
562(M)
R120
47K
C134
223(M)
C131
47u
C120
1u D102
1N4148
C108
333(M)
IC101
BA3308
R103 82K
R140 2K2
R102 82K
D103
1N4148
FM BAND BASS
FILTER
AM BAR
ANTENNA FM ANT
T301
FM IF
RADIO
FM DETECTION
TAPE
CD
RADIO
TAPE
CD
SW1-C
SW1-D
RADIO-LCH
CD-LCH
CD-RCH
RADIO-RCH
CD
FUNCTION
SELECTOR
FUNCTION
SELECTOR
AM IF
AM IF
FM OSC AM OSC
IC1
TA2111
IC1
FM/AM IF MPX.
TA2111N
R
R/P PWB-A2
VOLTAGE(V)
PIN
IC101 BA3308
0
1
1.89 0.03 1.94 0.01 7.06 2.01 1.91
0.03
23456789
A
B
C
D
E
F
G
H
654321
NOTES ON SCHEMATIC DIAGRAM can be found on page 6-1.
MAIN PWB-A1

QT-CD700W
17
Figure 16 SCHEMATIC DIAGRAM (2/4)
R2
47K
3
10
00
R410
2K7
R413
56K
R414
180K D402
5V1
D403
1N4148
D9A
1N4001
D8
1N4001
D7
1N4001
R411
5K1 R412
390
D10
1N4148
D3
1N4148
D2
1N4148
D6
1N4148
D505
1N4148
D5
1N4148
D506
1N4148
D503
1N4148
R505
100K C526
10U
Q504
8050
Q503
9015
R504
47K
R514
560
C7
100UF/25V
R515
100
C519
203
C522
100u D504
6V8
R503
2K2
C516
100u
C518
203
C4
470U
R2
1K
R511
12K
R403
3K
R10
1k
Q7
9014
Q2
9014
VR1A
0V
0V
0V
14.5V 14.0V
14.3V
0.17
6.16V
6.12V
14.5V
8.0V
14.2V
4.99V
4.48V
6.22V
6.85
9.1V
9.85V
0V
9.9V
6.72V
4.32V
8.0V
4.32V
5.43V
0.14V
C403
104M
C404
470P
C521
1u
C502
1u
C501
102(M)
C508
100U
FM SIGNAL
AM SIGNAL
CD SIGNAL
PLAYBACK SIGNAL
RECORD SIGNAL
HEADPHONES
PHONE 1
SPEAKERS
C511
104(M)
C524
1000U/25V
C514
470u
C513
470u
SPK401
L:8OHM
SPK402
R:8OHM
LED 2 POWER LED
VOLTAGE SELECTOR
AC INPUT SOCKET
AC100-127V/
220-240V
60/50HZ
SW651
AC INPUT
AC/DC SELECTOR
BATTERY
DC 12V
UM-2 / SIZE "C" / R14 ×8
T501
S0651
220V 110V
POWER
TRANSFORMER
R42 4K7
R40 560
CN6
L1
L3
CB1
22U
CB2
22U
SPK403
SPK404
L2
CN6A
CN6A
C506
100u
C510
100u
Q3
9014
C512
104(M)
IC3
YD8227
C503
1u
IC3
POWER AMP
YD8227
Q6
9014
R23
10k
R22
10k
C520
1u
C401
104M
R510
12K
R401
3K
VR1B
C402
470P
C507
10U
R9
1k
R5
4.7
R7
1K
R8
47K
C6
100U
C5
220U
C8
203
RADIO-LCH
RADIO-RCH
H
L
R
CN501A CN501B
L201
POWER PWB-A4
C205
203
1N4001
D202
1N4001
C204
203
D203
1N4001
C202
203
C203
203
D204
1N4001
CN502A CN502B
FUSE 1
T1.25AL 250V
789 101112
654 321
C200 562
R501 120
R502 120
R601 180
R602 180
R6 4.7
C509 47U
C504 102(M)
C515 10U C525 10U
C717 203
D9
1N4001
C201
2200U/25V
C505 47U
R306 3K9
R307 3K9
RADIO
TAPE
CD
RADIO
TAPE
CD
1
2
1
2
REGULATOR
Q408
R517 150
Q407
9014
Q406
9014
D772
SW1-B
SW1-A
AMUTE
CD+8V
FUNCTION
SELECTOR
FUNCTION
SELECTOR
IC3 YD8227
VOLTAGE(V)PIN NO
14.0
13.85
7.20
1
2
3
4
5
6
7
8
9
10
11
12
7.20
13.85
0
0.52
0
0
0.51
7.2
2
1
2
1
14.7
7 8 9 10 11 12

QT-CD700W
18
Figure 17 SCHEMATIC DIAGRAM (3/4)
R102A
4.7
1.81V
VDD
3.11V
2.38V
C102A
470UF/10
R110A 56K
C601 470U/10V
C103A 103
R109A 47K
R101A 91
R106A 47K
R108A 47K
R107A 47K
R111A 56K
R129A OPEN
R105A
4.7 R103A
100K
R112A
150K
TDOUT
JUMP0
TP6
L5
26uH
C602
104
C607
104
IC601 BA5826FP
R602A
0
7.14V
7.77V 3.30V
137A
104
C603
470U/10V
Q601
2SB1237
C135 104 C138A 104
C605
47UF/10
C54
470U/10V
C606
470U/10V
C71 104
R104A
1K
R3B
100K
C1
1UF/50
0V
0.61V
0V
R2B
100K
C104
100UF/10
R1B
3.3M
C126A
1UF/50V
C12
10
C122A
100P
R122A
75K
R4B
47K
TP3
TE
C125A
682
C110A 104
C503A
R506A 1
R507A 1
R508A
104
R115 18K
C111A 104
C115 104
C109A 470P
IC201A
BU24530-9A
RF
RFRPRFM
TZCRFM
C123A 150P
C121A 2200P
C124A 1UF/50V
R121A 27K
Q1
2SC1740S
C105A
104
C112
120P
R130
3K3
R125A
8K2
R124A
4K7
R603
10K
R19
10K 1N
R18
10K
R601A
47K
C604
104
Q602
9014
VDD
0V
0V
2.15V
R605
10K
R604
10K
C609
R126A 0
C608
4.7UF/50V
R116
6K8
R118A
33K
R117A
390K
C117
104
C118
10U R119
4.7K
C130A
104
C114
0.22UF/50V
C113
3.3UF/50V R114
470
R113
0
FE
L101A
10uH
C107
104
C108A
100UF
C101A
100UF/10
Q101A
2SA933
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1VREF
E
COM
D
A
VDD
B
C
F
GND
LD
VR
MD
F+
CN1
M702
SPINDLE
MOTOR
CNP803 CN2
SW702
M
M
LIMIT SWITCH
CD+8V
CD MOTOR PWB-B
M701
SLED
MOTOR
T-
T+
F-
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Fouse Coil
Tack Coil
16
IC601 BA5826FP
VOLTAGE(V) VOLTAGE(V)PIN NOPIN NO
0
1.64
1.64
5.65
3.16
2.67
1.64
1.64
6.40
6.40
1.64
1.63
1.64
2.96
2.92
0
3.21
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
0
0
0
1.56
0.77
5.77
3.32
2.19
0
2.82
3.04
PICKUP UNIT
1
1 2 3 4 5 6 7 8 9
10
11
12 13 14
21 20 19 18 17 16 15 28 27
V01- V02-
V02+ V01+ IN2'
IN2
PGND
0POUT VIN1 RESET REGB
REGOUT
REGGND /MUTE
PGND
V03-
V03+
V04-
IN3'
IN3
RSTT
0PIN-
V04+
IN4
IN4'
BIAS
VCC
VCC
26 25 24 23 22
SP+
SM+
SP-
SM-
MSW
GND
2
3
4
5
6
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
AVDD1
AC
BD
VBIAS
E
6
AGND1
FEN
FE0
PKC
BTC
PD
LD
ASY
AV
PC0
PWC/W
P03
P
SE
CC
C
17 18 19 20 21 22 23 24 25 26 27 28 29 30
FC0 AGND2
FDOUT
JUMP0
TDOUT
SDIN SDOUT CLVOUT
ADC0/GAIN_SEL ADC1/KEY
CLK88
LON SEGA/COM0 SEGB/COM1
64 63 62 61 60 59 58 57 56 55 54 53 52 51
EQ0
RF1
CAGC
TEN
TE0
SC
TZCRFM
RFRPRFM
AGND3
RDAC0
VCDAC
LDAC0
AVDD3
DGND
A
B
C
D
E
F
G
H
654321

QT-CD700W
19
Figure 18 SCHEMATIC DIAGRAM (4/4)
C126A
1UF/50V
R128A
220
R505A
10K
C502A
104
L202
100uH
C133A
100UF/10
104
C134A
C128A
104
C132A
15P
R302A
3K
C306
4.7UF/50V
R306A
560
R305A
560
CD-RCH
1
2
3
CD-LCH
CN8
1
2
1
2
CN5
CN9B S4
PLAY
S7
RANDOM
S3
STOP
S2
FF
S1
FB
S6
REPEAT
S5
PROG
R515A
10K
R514A
4K7
R513A
3.3K
R512A
2K7
R511A
1K8
CN9A
CN5A
C305A
4.7UF/50V
R304A
2K7
R303A
2K7
R24
1K
AMUTE
3.29V
-0.8V
0.66V
REC-SYN
FMST-
FMST+
-0.8V
0V0V
0V
3.27V
B
E
C
R16
0
Q4
9014
Q5
9014
R15
10K
R14
10K
R13
10K
OPEN/CLOSE
LEAF SW
SW810
FM ST
LED1
C505A
104
R301A
3K
C301A
560P C302A
560P
C304A
560P
C303A
560P
Q301
DTA124ESA
C138
104
C131A
15P
C127A
100UF/10
X1
16.9344M
R120A 1M
R540 OPEN
C503A 104
R506A 10K
R507A 10K
R508A 1K8
R531 0
R529 0
104 C508A
LCD DISPLAY
00 LCD 1
CD CONTROL PWB-A3
MAIN PWB-A1
CN4B
CN4B
CN4A
R541 OPEN
R542 OPEN
R543 OPEN
R545 470K
R546 470K
R547 470K
A
VDD
R1 4.7
R503A 1K
9
K
D4
1N4148
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
DVDD
RESETB
PWC/W_REMOTE
P11/SYNC
P10/PLAY
P03/PRO_LED
P02/MMUTE
P01/LID
P00/INNER
SEG6/AMUTE
CCOM1/SEG5
COM0/SEG4
SEG./3
SEGG/2
SEGF/1
SEGE/0
26
27 28 29 30 31 32
ADC1/KEY
CLK88
LON SEGA/COM0 SEGB/COM1 SEGC/COM2
SEGD/COM3
55
54 53 52 51 50 49
RDAC0
VCDAC
LDAC0
AVDD3
DGND
X0 X1
1 2 3 4 5 6 7 8 9
10
1 2 3 4 5 6 7 8 9
10
1 2 3 4 5 6 7 8 9
10
COM0 COM1 COM2 COM3
SEG0 SEG1 SEG2 SEG3 SEG4 SEG5
A00 A01 A02 A03 A04 A05 A06 A07 A08 A09
A00 A01 A02 A03 A09 A08 A07 A06 A05 A04
IC201A BU24530-9A
VOLTAGE(V)PIN NO
3.32
1.72
1.72
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1.66
2.58
2.27
1.67
1.66
1.71
1.71
0
1.66
1.03
0.20
15
16
17
18
19
20
21
22
23
24
1.63
0.65
1.67
1.64
3.33
1.66
VOLTAGE(V)PIN NO
1.61
0
1.56
49
50
51
52
53
54
55
56
57
58
59
60
61
62
1.65
0.42
0.77
0.77
3.32
1.66
1.67
0
1.85
1.66
1.67
63
64
1.66
1.62
1.53
0
1.65
1.67
VOLTAGE(V)PIN NO
1.82
1.66
3.32
25
26
27
28
29
30
31
32
33
34
35
36
37
38
1.60
1.60
1.54
1.57
3.39
1.49
1.46
1.46
1.46
1.63
1.63
39
40
41
42
43
44
45
46
47
48
3.30
3.31
3.32
3.32
3.29
3.30
0.94
0.06
0
0.02
78910 11 12

QT-CD700W
20
Figure 19 WIRING DIAGRAM OF P.W.BOARD (1/2)
A
B
C
D
E
F
G
H
123456
ECB
ECB
ECB
ECB
EC B
EC B ECB
E
C
B
RD
RD
RD
RD
12
12
RD
RD
RD
WH
WH
WH
CN14A
CB1
SPK403
SPK404
CB2
RD
BK
BK
BK
BK
BK
BK
BK
RD
C403
AC1
L6
GND3
BAT-
CC4
C201
C717
D204 VCC
C202
CN6A
D9
L7 AC-1
C205
C203
D203
IC3
D205
VCC+
BAT+
C510
C503
C5
C512
C511
C524
C
C514
C509 C513
CN501B
GND1
AC-2
J73
FUSE
D202
C204
T1.25AL 250V
AC11
AC22
C401
D102
D103
C129
C109
C127
CN103
C110
C133
CN7B
T101
Q103
C134
C135
SW2
C126
C124
CN15
C106
123 4
1234
12 12
12
34
1234
C125
123456789
C130
C108
C131
Q101
C122
C102
Q102
C121
C128
R20
C136
C120
CN14
C132
IC101
GND
VCC
L.SW
PL B+GND
CN503B
PRPR RL MUTE
C123
BK
WH
WH
WH
WH
BK
CN15A
CN7A
CN103A
RD WH WH
BK
BK
BK
RD
RD
WH
BATTERY
T501
L3
CN6
L2
L1
D504
Q504
Q503
C6
Q6
Q3 Q7
12
11
10
9
87
1 234 56 78910 11 12
1 234 56 789101112
BR
BK
WH
GY
VI
BL
GR
YL
OR
RD
BR
BK
CN503A
CN50
POWER LED
65
4
32
1
C507
C516
C521
C520
D503
SW1
VR1
G
D7
PHONE1
CN501A
RD BK
12
12
SPK401
L-CH
SPK402
R-CH
SO651
SW651
SPEAKERS
TAPE
TAPE LEAF SW
SW502
M501
TAPE
MOTOR
RECORD/PLAYBACK
HEAD
MIC
VOLTAGE SELECT
AC220-240V AC110-127V
AC INPUT SOCKET
POWER
TRANSFORMER
1234
1234
BK BK RD WH