Casio CD-311S User manual

(without price)
CD-311S
CD RADIO CASSETTE PLAYER
INDEX
Model-C: Europe
Model-E: Other Countries

Disassembly Instructions ................................................................................................................. 1
Reassembly of Tuning Pointer ......................................................................................................... 3
Block Diagrams ................................................................................................................................ 4
Tuner.......................................................................................................................................... 4
AMP, Tape, PS .......................................................................................................................... 5
CD.............................................................................................................................................. 6
Cassette Mechanism Electrical Adjustments ................................................................................... 7
CD Adjustment ................................................................................................................................. 9
CD Troubleshooting ....................................................................................................................... 11
PCB Views ..................................................................................................................................... 20
Tuner PCB Top View ............................................................................................................... 20
CD AMP/Door SW PCB Top View ........................................................................................... 21
VR PCB Top View.................................................................................................................... 22
PS PCD Top View.................................................................................................................... 23
Tape PCB Top View................................................................................................................. 24
LCD PCB Top View.................................................................................................................. 25
Wiring Diagram .............................................................................................................................. 26
IC Lead Identification and Internal Diagrams ................................................................................. 27
Schematic Diagrams ...................................................................................................................... 33
CD Mechanism ........................................................................................................................ 33
Tuner........................................................................................................................................ 34
AMP,PS.................................................................................................................................... 35
Tape......................................................................................................................................... 36
CD............................................................................................................................................ 37
Parts List ........................................................................................................................................ 38
Exploded Views.............................................................................................................................. 45
Cabinet..................................................................................................................................... 45
Cassette Mechanism ............................................................................................................... 46
Case Unit ................................................................................................................................. 47
Top Case Unit .......................................................................................................................... 48
CD Mechanism ........................................................................................................................ 49
CONTENTS

DISASSEMBLY INSTRUCTIONS
1. Remove the battery cover and batteries.
2. Remove six screws A holding case B ass’y(case B unit, PS unit).
Figure 1
3. Remove four screws B holding the case ass’y.
Case B Ass'y
Battery Cover
CD Door
Case Angle
Top Case Ass'y
Case Ass'y
Figure 2
1

Select Knob
Select Knob
Volume Knob Tuning Knob
LCD Unit
Tuner Unit
VR Unit CD
Mechanism
Set
CD AMP Unit
Top Case Unit
Figure 3
4. Pull out the two slect knobs, volume knob and tuning knob.
5. Remove four screws C holding the tuner unit.
6. Remove six screws D holding the CD AMP unit.
7. Remove five screws E holding the VR unit.
8. Remove three screws F holding the CD mechanism set.
9. Remove two screws G holding the LCD unit.
10. Remove three screws H holding the tape unit.
11. Remove four screws J holding the angle A and
cassette mechanism unit. Angle A
Tape Unit
Case Unit
Cassette mechanism Unit
Figure 4
2

REASSEMBLY OF TUNING POINTER
1. Turn the varicon unclockwise stop position.
2. Set the pointer ;mark position. (refer figure 6)
3. Set the varicon gear of figure 6 position.
4. Insert the tuner gear
Figure 6
3
Varicon Gear
Tuner Gear
Pointer
Mark Tuner Chassis
K
Figure 5
Varicon Gear
Pointer
Varicon
Tuner Gear
L
Tuner Chassis

BLOCK DIAGRAMS
Tuner
FM
AF
AM
AF
FM
IF
AM
IF
FM
RF
AM
OSC
FM
OSC PRE VCO Decode
SW
HYS
F.F
TUN
LED ST LED FM DET
AM/FM
SW
Level
DET
AM
DED
AGC
AM
MIX
FM
MIX
AM
RF In
FM
RF Out VCC1
FM
OSC AM
OSC DET
Out MPX In LPF1 LPF2 VCO
GND VCC R ch L ch
FM
RF In
GND1 FM MIX AM MIX AGC VCC2AM IF
In FM IF In GND2 QUAD
31 2 4
To Amplifier Block
22 21 20 19 18 17 16 15 14 1324 23
D3
Bar
Antenna
L1 L5 L4 L3
SW1
BAND SW
AM
FM-
Stereo
FM-MONO
Rod
Antenna
L8
CF1 CF2
L9
FM Signal
AM Signal
L7
1 2 3 4 5 76 8 9 10 11 12
4

AMP, Tape, PS
L ch
R ch
REC L ch
REC R ch
Tape 9V
DC 9V
GND
BEAT
DC 9V
GND
AC 9V
T1
CD 9V
GND
L ch
R ch
L ch
R ch
REC L ch
REC R ch
TAPE 9V
DC 9V
GND
BEAT
SW101
REC/PLAY
IC101
PRE AMP
L101
OSC
TAPE BLOCK
SW501 Beat
Q620,
Q720
Q623,
Q723
AF MUTE
IC581
PW AMP
L ch
R ch
TU 9V
GND
CD 9V TU 9V Tape 9V DC 9V
CD 9V
TU 9V
Tape 9V
DC 9V
AMP BLOCK
VR201 Volume
SW202
SW201
Function
PS BLOCK
To CD
Block
To Tuner
Block
AC
BATT
Speaker
Headphone
R/P Head
Audio Signal
Recording Signal
5

CD
CD Mechanism
Disc
Pickup
M
Disc
Motor
M
Sled
Motor
IC501
Signal Servo
Processor
Q501
Laser
Driver
IC503
Motor and Actuator
Driver IC502
Digital Signal
Processor
IC801
µµ
µµ
µ-COM
SW801~SW806
Control
Display
IC504
Audio
Filter AMP
X501
16.9 MHz
CD L ch
A-GND
CD R-ch
CD 9V
GND
Q501, Q511
D510
Regulator 5V
Q504, Q505
D504
Regulator 8V
Pset
SW
Door
SW
6

R/P Head
Adjust Screw
CASSETTE MECHANISM ELECTRICAL ADJUSTMENTS
General Remarks
*Before attempting to adjust the mechanism, wipe clean all tape-contacting surfaces (pinch roller, REC/PB
head, erase head, and capstan), as well as the contact surfaces of the driving parts (motor pulley, flywheel,
pulley, belt, and clutch assembly), with a piece of soft cloth moistened with denatured alcohol. Grease stains
may cause trouble.
*Never use a magnetized screwdriver for head adjustment.
Equipment Required
*Oscilloscope
*Frequency counter
*Screwdriver (Plastic type)
*Test tapes MTT-113C (TEAC) or TCC-111N (TEAC)
Head Azimuth Adjustment (Figures 7 and 8)
Step Setting Adjust Result
1Play the test tape 8 KHz
position. (MTT-113C) Azimuth screw (Figure 8) Obtain the maximum amplitude. (A: Maximum) (B: Minimum)
Figure 8
Figure 7
Note: Mode Switch is X-Y position.
Oscilloscope
A
B
Set J501
Headphone Jack
7

Tape Speed Adjustment (Figures 9 and 10)
Step Setting Adjust Result
1Playthe test tape.
(MTT-111N) Motor screw
(Figure 10) Frequency counter reading
should be 3000 Hz (2910~3090).
Figure 10
Furequency Counter
Figure 9
3000
Set J501
Headphone Jack
8
Motor
screw

Pre-Adjustment Procedures
* Remove the bottom chassis assembly. (Refer pages 1, 2)
* Use the plastic screwdriver.
Equipment Required
* Syncroscope (with probe 10:1)
* Screwdriver (Plastic type)
* The Test Disc SONY YEDS-18(Type 4)ABEX TCD784
E-F Balance Adjustment (Figures 11 and 13)
CD ADJUSTMENTS
A
B
0V
(Vref)
A=B
Step Connect Setting Adjust Result
Play the test disc.1See
Figure 11 VR501
Set the PAUSE
mode.
2
Syncroscope CD PCB
GND
R572
(TSO)
R571 Vref
Figure 11
RF Adjustment (Figures 12 and 13)
Step Connect Setting Adjust Result
Syncroscope CD PCB
Adjust VR502 for the amplitude of the waveform
at maximum.
VR502
Measuring on syncroscope.
Play the test disc.
See
Figure 12
1
0V >1.0V p-p
GND R571 Vref
R570 (RFO)
Figure 12
9

10
CD Adjustment Points
VR502
EF Balance
RF
VR501
TSO
R572
RFO
R570
Vref
R571
Figure 13
CD PCB Top View

Open CD door and set function switch
for CD position.
CD TROUBLESHOOTING
Is “00” display
on LCD ? 1
2
Is the audio signal
present at the output
terminals ? 3
Press “ “ or ” “ key.
Can a selected
of music be searched
smoothly ? 4
OK
No
Yes
No
No
Yes
Yes
Yes
Load a disc and close CD door.
No
Press “ / “ key.
Is total track
numbers displayed about 5
seconds ?
11

1
Is +5 V lines normal
(for IC801)?
No
Yes
*Check Q510, Q511 and D510.
*Check Q504, Q505 and D504.
*Check circuit around IC801.
Does 16.93 MHz
clock pulse appear at
IC502 pin 79 ?
No
Yes
*Check X501.
*Check circuit around X501 and IC502.
Does 1.4 MHz
clock pulse appear at
IC801 pin 30 ?
No
Yes
*Check circuit around IC502 pin 72.
*Check and circuit around IC801.
*Check LCD.
*Check wire connector.
1. At power on, “00” is not displayed.
2. “-- --” is not displayed total track numbers.
2
How long times it takes until “-- --” is
displayed after CD door has closed.
A B
About
5 sec. About 16 sec.
12

2-A
A
Note: Open the CD door and check the radiation
power with an optical power meter or by watching
the radiaation through the lens of the pickup unit at
a minimum distance of 30cmfrpm the pickup.
Does the LASER emit ? A1
Dose the lens move
up and down ? A2
Load a disc and close CD door.
Then check the following.
Is the waveform
at R570 (RFO) like that
shown in Fig. 15 ?
*Check around IC501 and IC502.
Is the waveform
at pin 21 (SEL) of IC501 like
that shown in Fig. 14 ?
*Check wire connector from pickup.
*Check IC501.
*Check pickup.
Is the waveform
at pin 10 (FEO) of IC501 like
that shown in Fig. 16 ?
*Check around pins 8, 9 and 10 of
IC501.
*Check VR502.
*Check around IC501.
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Figure 14
Figure 15
Figure 16
5V
1V
>0.4V
!
!
!
SEL-GND
RFO-Vref
FEO-Vref
13

2-A1
Is Q501
emmiter 5V ?
(Play) *Check Q501.
Are waveforms at
pins 14~19 of IC502 like that
shown in Fig. 17 ? *Check around IC 502 and IC801.
Is waveform
at pin 42 (SEL) of IC502 like
that shwn in Fig. 18 ? *Check around IC501 and IC502
(SEL).
Is waveform at
base of Q501 like that
shown in Fig. 19 ?
*Check around pin 45 of IC501
and Q501.
*Check IC501.
*Check 16P flat cable.
*Check pickup.
No
No
No
No
Yes
Yes
Yes
Yes
Figure 17
Figure 18
Figure 19
5V
0V
5V
0V
0V
2.5V
3V
A1
(GND)
(GND)
(GND)
14

2-A2
A2
Are voltages more
than 8V appeared at pins
1and 10 of
IC503 ?
*Check around IC503 and Q504.
Is waveform at
pins 11 to 12 of IC503 like that
shown in Fig. 20 ?
*Check 16P flat cable.
*Check pickup.
Is waveforn at
pin 16 (FSO) of IC501like
that shown in Fig.21 ?
Is waveform at
pin 17 (COSC) of IC501 like that
shown in Fig. 22 ?
*Check around IC503.
*Check around IC502.
*Check around IC501.
No
No
No
Yes
Yes
No
Yes
Yes
1V
VREF-COSC
4V
Figure 20 Figure 22
VREF-FSO
Figure 21
1V
15

2-B
Does the
disc motor rotate ? B1
Is waveform at
pins 15 to 16 of IC503 like that
shown in Fig. 23 ?
*Check wire connector CN543 and
wire.
*Check disc motor.
Is waveform at pin
40 (DMPC) of IC502 llike that
shown in Fig. 24 ?
Is waveform at pin
24 (DMEO) fo IC501 like that
shown in Fig. 24 ?
*Check around IC501 and IC502.
*Check around IC501 and IC502.
Yes
Yes
Yes
Yes
No
No
No
No *Check around IC501 and IC503.
> 5V
Figure 23
>4V
Figure 24
B
16

2-B1
Confirm the waveforn at R570 (RFO) with a
syncroscope.
Waveform Waveform
Is waveform at
pin 53 (RFI) of IC502 like that
shown in Fig. 25 ?
B2
Is waveform at
pin 60 (PDO) of IC502 like that
shown in Fig. 26 ?
*Check around pin 53 of IC502.
*Readjust VR502.
*Check around PLL of IC502.
*Check digital signal of IC502 and
IC801.
*Check IC502 and IC801.
No
No
Yes
Yes
Figure 25 Figure 26
B1
1.0~1.4V 4V
17

2-B2
Is waveform R572
(TSO) like that shown
in Fig. 27 ?
Is waveform at pin
30 (TS20) of IC501 like that
shown in Fig. 27 ?
Is waveform at pins
13 to 14 of IC503 like that
shown in Fig. 28 ?
*Check 16P flat cable.
*Readjust VR501.
*Check IC501.
*Check around TE-Amp lines.
*Check IC501.
*Check around TSO lines.
*Check IC503.
*Check pickup.
3
*Check around IC502 pins 2~6 and IC504.
*Check D601 and D701.
*Check around IC601.
No
No
No
No
Yes
Yes
Yes
Yes
Figure 27 Figure 28
B2
0.6V/1.5V 3V
Does audio
signal appear at IC504
pins 1 and 7 ?
3. No present at output terminals audio signal
18