Sharp GX-CD30 User manual

GX-CD30/30C/130/130C
No. S3607GX-CD130
SERVICE MANUAL
GX-CD30
GX-CD30C
GX-CD130
GX-CD130C
• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified
should be used.
Illustration: GX-CD130
SHARP CORPORATION
Service Headquarters: Sharp Plaza, Mahwah, New Jersey 07430-2135
SHARP ELECTRONICS CORPORATION
CONTENTS Page
IMPORTANT SERVICE NOTES (FOR GX-CD30/130 ONLY) .......................................................................................... 2
SPECIFICATIONS ............................................................................................................................................................. 2
NAMES OF PARTS ........................................................................................................................................................... 3
DISASSEMBLY.................................................................................................................................................................. 4
REMOVING AND REINSTALLING THE MAIN PARTS..................................................................................................... 6
ADJUSTMENT ................................................................................................................................................................... 8
TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 10
NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 13
TYPES OF TRANSISTOR ............................................................................................................................................... 13
BLOCK DIAGRAM ........................................................................................................................................................... 14
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD............................................................................................. 18
WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 27
FUNCTION TABLE OF IC................................................................................................................................................ 28
PARTS GUIDE/EXPLODED VIEW
PACKING OF THE SET (FOR GX-CD30/130 ONLY)
DIFFERENCE BETWEEN GX-CD30/30C AND GX-CD130/130C
GX-CD30/30C GX-CD130/130C
REMOTE None Used
CONTROL
X-BASS None Used

GX-CD30/30C/130/130C
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
– 2 –
BEFORE RETURNING THE AUDIO PRODUCT
(Fire & Shock Hazard)
Before returning the audio product to the user, perform the
following safety checks.
1. Inspect all lead dress to make certain that leads are not
pinchedorthathardwareisnotlodgedbetweenthechassis
and other metal parts in the audio product.
2. Inspect all protective devices such as insulating materials,
cabinet, terminal board, adjustment and compartment
covers or shields, mechanical insulators etc.
3. To be sure that no shock hazard exists, check for leakage
current in the following manner.
* Plug the AC line cord directly into a 120 volt AC outlet.
* Using two clip leads, connect a 1.5k ohm, 10 watt resistor
paralleled by a 0.15µF capacitor in series with all exposed
metal cabinet parts and a known earth ground, such as
conduit or electrical ground connected to earth ground.
* Use a VTVM or VOM with 1000 ohm per volt, or higher,
sensitivity to measure the AC voltage drop across the
resistor (See diagram).
* Connect the resistor connection to all exposed metal parts
havingareturnpathtothechassis(antenna,metalcabinet,
screw heads, knobs and control shafts, escutcheon, etc.)
and measure the AC voltage drop across the resistor.
IMPORTANT SERVICE NOTES (FOR GX-CD30/130 ONLY)
AllcheckmustberepeatedwiththeAClinecordplugconnection
reversed.
Anyreading of0.3 voltRMS (thiscorresponds to0.2 milliamp.
AC.) or more is excessive and indicates a potential shock
hazard which must be corrected before returning the audio
product to the owner.
TO EXPOSED
METAL PARTS
CONNECT TO
KNOWN EARTH
GROUND
TEST PROBE
0.15 µ F
1.5k ohms
10W
VTVM
AC SCALE
SPECIFICATIONS
● General
Power source: AC 120V, 60 Hz
DC12V["D"size(UM/SUM-1,R20
or HP-2) battery x 8]
Power consumption: 25 W
Output power: FTC; 2.5 W minimum RMS per
(30/130) channel into 6 ohms from 100 Hz to
20kHzwithnomorethan10 %total
harmonic distortion.
RMS; 3.5 W per channel at 1 kHz,
10 % total harmonic distortion.
(AC operation)
Output power: RMS; 7 W (3.5 W + 3.5 W)
(30C/130C) (AC operation, 10 % T.H.D.)
Output terminal: Headphones; 16 - 50 ohms
(recommended; 32 ohms)
Dimensions: Width; 12" (304 mm)
Height; 9-1/4" (234 mm)
Depth; 8-9/16" (216 mm)
Weight: 7.1 Ibs. (3.2 kg) without batteries
● Radio
Frequency range: FM; 87.6 - 108 MHz
AM; 530 - 1,702 kHz
● Tape recorder
Frequency response: 50 - 14,000 Hz (Normal tape)
Signal/noise ratio: 50dB(TAPE1,recording/playback)
55 dB (TAPE 2, playback)
Wow and flitter: 0.25 % (WRMS)
Motor: DC 12 V electric governor
Bias system: AC bias
Erase system: AC erase
●Compact disc player
Disc: Compact disc
Signal readout: Non-contact, 3-beam semi-
conductor laser pickup
Audio channels: 2
Quantization: 16-bit linear
Filter: 4-tims oversampling digital filter
D/A converter: 1-bit D/A converter
Wow and flutter: Unmeasurable
(less than 0.001% W. peak)
●Speaker
Type: 2-way bass-reflex type
Speakers: 4" (10 cm) woofer x 2
Tweeter x 2
Maximum input power: 5 W
Impedance: 6 ohms
Dimensions: Width; 7-5/16" (185 mm)
Height; 8-11/16" (220 mm)
Depth; 5-15/16" (150 mm)
Weight: 2.2 Ibs. (1.0 kg) /each
Specifications for this model are subject to change without
prior notice.

GX-CD30/30C/130/130C
NAMES OF PARTS
HMain Unit
1. CD Play Indicator: 00
00
0
2. CD Repeat Indicator: RR
RR
R
3. CD Track Number Indicator
4. CD Eject Button: 77
77
7
5. Remote Control Sensor (GX-CD130/130C ONLY)
6. CD compartment
7. (CD) Track Down/Review Button: 55
55
5 /33
33
3
8. (CD) Track Up/Cue Button: 44
44
4/ 22
22
2
9. (CD) Stop Button: HH
HH
H
10. (CD) Play/Repeat Button: 0R0R
0R0R
0R
11. (CD) Pause Button: 66
66
6
12. Tuning Control
13. Power/Function/Band Selector Switch
14. Beat Cancel Switch
15. X-Bass Switch (GX-CD130/130C ONLY)
16. Tone Control
17. Volume Control
18. Tweeter
19. Woofer
20. Bass Reflex Port
21. (TAPE1) Cassette Compartment
22. (TAPE1) Record Button: II
II
I
23. (TAPE1) Play Button: 00
00
0
24. (TAPE1) Rewind Button: 33
33
3
25. (TAPE1) Fast Forward Button: 22
22
2
26. (TAPE1) Stop Eject Button: HH
HH
H /77
77
7
27. (TAPE2) Play Button: 00
00
0
28. (TAPE2) Stop Eject Button: HH
HH
H /77
77
7
29. (TAPE2) Cassette Compartment
30. Speaker Terminals
31. FM Telescopic Rod Aerial
32. Speaker Wire
33. Speaker Release Lever
34. Battery Compartment
35. Headphones Socket
36. AC Power Input Socket
HRemote Control (GX-CD130/130C ONLY)
1. Remote Control Transmitter LED
2. (CD) Play/Repeat Button: 0R0R
0R0R
0R
3. (CD) Track Down /Review Button: 55
55
5 /33
33
3
4. (CD) Pause Button: 66
66
6
5. (CD) Track Up/Cue Button: 44
44
4 / 22
22
2
6. (CD) Stop Button:HH
HH
H
25˚
25˚
8" - 20' (0.2 - 6 m)
Notes concerning use:
•Periodicallycleanthetransmitter LED on theremotecontrol
and the sensor on the main unit with a soft cloth.
•Exposing the sensor on the main unit to strong light may
interfere with operation. Change the lighting or the direction
of the unit.
•Keep the remote control away from moisture, excessive
heat, shock, and vibrations.
– 3 –
30 31 32
32
33 33363534
2
3
4
5
6
1
4 5 6 7 8 9 1011 12 13
18
19
14
15
16
17
18
19
20 20
21 22 23 24 25 26 27 28 29
3
2
1

GX-CD30/30C/130/130C
UNIT
1 Front Cabinet 1. Screw....................(A1) x7 4-1
2. Socket...................(A2) x1
3. Flat Cable .............(A3) x1
2 Top Cabinet 1. Open the CD lid.
(with CD Block) 2. Screw....................(B1) x5 4-2
3. Flat Cable .............(B2) x2 4-2, 4-3
4. Tip.........................(B3) x1 4-2
3 Tuner PWB 1. Screw................... (C1) x3 4-3
(with Tuner Frame) 2. Flat Cable .............(C2) x1
4 Main PWB 1. Screw................... (D1) x1 4-3
2. Knob .................... (D2) x2
3. Flat Cable .............(D3) x1
5 Deck PWB 1. Screw....................(E1) x3 4-3
2. Socket...................(E2) x3
6 Tape Mechanism 1. Open the cassette holder.
2. Screw.................... (F1) x6 5-1
7 Display PWB 1. Screw................... (G1) x2 5-2
(with CD control 2. Hook .................... (G2) x3
Button) 3. Flat Cable ............ (G3) x1 4-2
8 Switch PWB 1. Screw................... (H1) x1 5-2
9 CD Servo PWB 1. Screw.................... (J1) x3 5-2
2. Socket................... (J2) x3
10 CD Mechanism 1. Screw....................(K1) x3 5-3
11 Power PWB/ 1. Open the battery lid.
Terminal PWB 2. Screw.................... (L1) x4 5-4
3. Hook ..................... (L2) x1
SPEAKER
1 Front Panel 1. Screw ...................(A1) x4 5-5
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
– 4 –
Figure 4-2
Figure 4-1
Figure 4-3
( A1 ) x2
ø3 x12mm
( A2 ) x1
( A3 ) x1
( A1 ) x4
ø3 x20mm
( A1 ) x1
ø3 x65mm
Rear
Cabinet
Power PWB
Front
Cabinet
( B1 ) x2
ø3 x10mm
( B1 ) x2
ø3 x10mm
( B1 ) x1
ø3 x8mm
OPEN
Top Cabinet
Tape
Mechanism
CD Servo PWB
Front
Cabinet
( B2 ) x1
( G3 ) x1
CD Servo
PWB
( B3 ) x1
( E1 ) x3
ø3 x10mm
( D1 ) x1
ø3 x10mm
( C1 ) x3
ø3 x10mm
( E2 ) x1
( B2 ) x1
( E2 ) x2
( D3 ) x1
( D2 ) x2
Front
Cabinet
Tape
Mechanism
Tuner
PWB
Main PWB
Washer
Deck
PWB
Tuner
PWB
( C2 ) x1

GX-CD30/30C/130/130C
Figure 5-1
( F1 ) x6
ø3 x10mm
Front Cabinet
Tape
Mechanism
Figure 5-2
( J1 ) x3
ø3 x10mm
( G1 ) x2
ø3 x10mm
( G2 ) x3 ( J2 ) x1
( J2 ) x2
( H1 ) x1
ø3 x12mm
Top Cabinet
CD Servo
PWB
Switch
PWB
Display
PWB
CD Mechanism
( K1 ) x3
ø2.6 x10mm
Figure 5-3
Figure 5-4
Power PWB
Terminal
PWB
( L1 ) x3
ø3 x10mm
( L1 ) x1
ø3 x10mm
Rear Cabinet
Driver
Push( L2 ) x1
Figure 5-5
( A1 ) x4
ø3 x20mm
Front Panel
– 5 –

GX-CD30/30C/130/130C
REMOVING AND REINSTALLING THE MAIN PARTS
How to remove the motor
(See Figs. 6-5 and 6-6.)
1. Remove the belt.
2. Removethescrews(G1)x4pcs.,toremovethemotorfixture.
3. Remove the screws (G2) x 2 pcs., to remove the motor.
Note:
Whenmountingthemotor,payattentiontothemotormounting
angle.
Figure 6-6
Figure 6-5
Figure 6-2
Figure 6-1
Figure 6-4
Figure 6-3
Play Button
TAPE 1
Erase Head Record/Playback
Head
Pawl
(A1)x2
( B1 ) x2
ø2 x7mm
AA
Pawl
(C1)x2
Play Button
Playback Head
BB
TAPE 2
TAPE1
Main Belt
(E1)x1
TAPE2
Main Belt
(F1)x1
Main Belt
(F1)x1 Main Belt
(E1)x1
FF/REW Belt
(E2)x1
Flywheel
Flywheel
Motor
Motor
TAPE 1
TAPE 2
( G1 ) x2
ø2 x4mm
( G1 ) x2
ø2 x4mm
Motor
Bracket
Motor
TAPE2 TAPE1
( G1 ) x2
ø2.6 x2mm
Motor
Bracket
Motor
– 6 –
Pinch Roller
(D1) x 1
Pawl C
Perform steps 1, 2, 3, 4, 5 and 6 of the disassembly method
to remove the tape mechanism.
TAPE MECHANISM SECTION
How to remove the record/playback and erase
heads (TAPE 1) (See Fig. 6-1.)
1. Carefully bend the record/playback head pawls (A1) x 2
pcs.,inthedirectionofthearrowÂ,andremovetherecord/
playback head upwards.
2.Removethescrews(B1)x2pcs.,toremovetheerasehead.
How to remove the playback head (TAPE 2)
(See Fig. 6-2.)
1.Carefullybendtheplaybackheadpawls(C1)x2pcs.,inthe
direction of the arrow È, and remove the playback head
upwards.
How to remove the pinch roller (TAPE 1/2)
(See Fig. 6-3.)
1. Carefully bend the pinch roller pawl in the direction of the
arrow Ê, and remove the pinch roller (D1) upwards.
How to remove the belt (TAPE 1) (See Fig. 6-4.)
1. Remove the main belt (E1) x 1 pc., from the motor side.
2. Remove the FF/REW belt (E2) x 1 pc.
How to remove the belt (TAPE 2) (See Fig. 6-4.)
1. Remove thetape2 mainbelt(E1) x1pc.,from themotorside.
2. Remove thetape 1mainbelt (F1)x 1pc.,from themotorside.

GX-CD30/30C/130/130C
CD MECHANISM SECTION
Perform steps 1, 2, 9 and 10 of the disassembly method to
remove the CD mechanism.
How to remove the pickup (See Fig. 7-1.)
1. Remove the hooks (F1) x 4 pcs., to remove the CD cover.
2. Remove the screws (F2) x 2 pcs., to remove the shaft (F3)
x1 pc.
3. Remove the stop washer (F4) x1 pc., to remove the gear
(F5) x 1 pc.
4. Remove the pickup.
FITTING OF DIAL POINTER
1. Remove the three screws, and remove the tuner PWB from the tuner frame. (See Fig. 7-2)
2. Turn fully the dial wheel in the Âdirection. (See Fig. 7-3)
3. Set the dial pointer as shown in Figure 7-2, and mount the tuner PWB.
Figure 7-1
Pickup
( F2 ) x2
ø2.6 x6mm
( F1 ) x2
CD Mechanism
CD Cover
Shaft
( F3 ) x1
Gear
( F5 ) x1
Stop Washer
( F4 ) x1
( F1 ) x2
– 7 –
Tuner PWB
(Top view)
Screw x3
Tuner
Frame
"0" Point
Dial
Pointer
( 229 )
Figure 7-2 Figure 7-3
Tuner PWB
(Bottom view)
A

GX-CD30/30C/130/130C
MECHANISM SECTION
• Driving Force Check
PLAY: TW-2412 Tape 1: Over 50 g
Tape 2: Over 100 g
Torque Meter Specified Value
• Torque Check
Torque Meter Specified Value
Play: TW-2111 30 to 60 g.cm 30 to 60 g.cm
Fast Forward: TW-2231 80 to 135 g.cm
Rewind: TW-2231 80 to 135 g.cm
Tape 1 Tape 2
• Tape Speed
Nomal MTT-111 3,000 Speaker
speed ±30 Hz terminal
(Load resistance:
6 ohms)
Instrument
Connection
Specified
Value
Test Tape
TAPE SECTION
Position of each switch or control
Volume control Max
Beat cancel A
Function/Power switch Tape/Off
• Bias Oscillation Check
Beat cancel A: 82 + 10 kHz / -6 kHz
B: -2 ±2 kHz
C: +3 ±2 kHz
Specified Value
• Erase Current Check Specified Value
Resistor for measurement: 1 ohm 50 ±25 mV
• Playback Amplifier Sensitivity Check
Instrument ConnectionTest Tape
MTT-118 1.8 V ±3 dB Speaker Terminal
(Load resistance: 6 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: Headphones
Socket (Load
resistance: 32 ohms)
• AM IF/RF
IF T3 Input: Antenna
Output: Pin 19 of IC2
Band Coverage fL: L4 Input: Antenna
fH: TC4 Output: Headphones
Tracking 600 kHz: L3 Socket (Load
1,400 kHz: TC3 resistance: 32 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. 8-1, 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.
– 8 –
Pin 13 of IC2 Pin 21 of IC2
D
G
S
10 kohm
TO FREQUENCY
COUNTER
FET : 2SK19 or 2SK54
Figure 8-1 VCO FREQUENCY TEST CIRCUIT
AM TRACKING
fH AM BANDfH
fL COVERAGE
FM
AM TRACKING fL
AM BARANTENNA
fH
fL
TRACKING
FM BANDfL
fH COVERAGE
VCO
L4
VR1
TC4
TC3
TC1
1
TC2
L2
L1
L3
T2
T1 T3
FM DET
AM IF
FM IF
FM RF IC2
IC1
13
1
17
19
21
Figure 8-2 ADJUSTMENT POINTS

GX-CD30/30C/130/130C
CD SECTION
Since this CD system incorporates the following automatic
adjustmentfunction,whenthepickupisreplaced,itisnecessary
to reajust it.
Sincethis CDunitdoesnotneedadjustment,thecombination
of PWB and laser pickup unit is not restricted.
– 9 –
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, press the PAUSE button.
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 PAUSE button.
Start
Display
LCD MODE
*Afterthenumber➂has appearedinthedisplay,each timethe"UP/CUE"buttonispressed,thedisplaywillswitch
in the following order: ➀, ➁, and then ➂.
1 second
1
2
1 second
3

GX-CD30/30C/130/130C
– 10 –
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 outputwaveformofIC801(16)(FD) matchthatshown in
Fig. 10? 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 10
• 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.

GX-CD30/30C/130/130C
– 11 –
Check the laser diode driver.
• Playbackcanonlybeperformedwhena 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.11-1, 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 11-2
Figure 11-1
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. 11-3
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 11-3

GX-CD30/30C/130/130C
– 12 –
The turntable fails to rotate or rotates at high speed. Yes
▼
Check the periphery of IC801 pins 23 to 27, pin 39 and pin 40,
IC802 pin 12 and pin 13, IC804 to BI803/CNS803.
The turntable rotates a little.
▼
Yes The spin driver circuit is normal.
Play operation is performed without disc.
• Checking the spin system.
No
▼
Yes
▼
Check the IC801 pins 43 and 44, IC802 pins 3, 5, 7, 9 and 10.
Error
▼
Yes Check PDO waveform (Fig. 12).
• Checking the VCO-PLL system
Play operation is performed when disc exits.
Yes
▼
▼
Although HF waveform is normal, TOC data cannot be read.
Figure 12
2
3
0.5s
1.00 V
IC802 3 PDO
0.5s
1.00 V
IC801 16 FD
As VCO freque-
ncy is locked at
4.32 M Hz,
voltage of PDO
rises and stabili-
zes.
Stop --> Play
Check IC802 pins 37and 40.
Check the periphery of IC803 (OPAMP).
▼
Abnomal
▼
Usually, the number of pulses of flawless disc is 100 pulses/
sec or less.
No
▼
Yes
Check IC802 pin 48 (EFLG).
• Although HF waveform is normal and the time
indication is normal, no sound is emitted.

GX-CD30/30C/130/130C
– 13 –
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 “ î” ( ) 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
•Theindicated voltage ineachsection is theonemeasured by
Digital Multimeter between such a section and the chassis
with no signal given.
SW201 RECODE/PLAYBACK OFF
SW351 BEAT CANCEL A
SW500 X-BASS [130/130C ONLY] OFF
SW501 POWER/FUNCTION OFF
SW605 TAPE 1 MAIN OFF
SW606 TAPE 2 MAIN OFF
SW607 TAPE1/2 SELECTOR OFF
REF. NO DESCRIPTION POSITION POSITIONREF. NO DESCRIPTION
SW702 PICKUP IN OFF
SW761 CD LID OPEN/CLOSE OFF
SW771 CD-PLAY/REPEAT OFF
SW772 CD-STOP OFF
SW773 CD-UP/CUE OFF
SW774 CD-DOWN/REVIEW OFF
SW775 CD-PAUSE OFF
ECB
(S)(G)(D)
(1) (2) (3)
FRONT
VIEW
2SC2001 K
2SD468 C
KRA102 M
KRC102 M
KTA1266 GR
KTC3199 GR
Figure 13 TYPES OF TRANSISTOR
BCE
FRONT
VIEW
2SD2394 F

GX-CD30/30C/130/130C
Figure 14 BLOCK DIAGRAM (1/4)
– 14 –
721
25
20
38
34
35
36
2
31
FOCUS COIL
TRACKING COIL
PICKUP UNIT
310 19 23 25
1
2
17
11
18
12
+5V
16 27
31
28
15
30
29
M
M
MOTOR
SLIDE
MOTOR
SPIN
1
2
3
4
9~~ 1732 14
321 CNP603
FROM MAIN SECTION
XIN
XOUT
K1
CD
OPERATION
KEY
SW771~SW775
RC IN
LID
321
321
CFW772
SW761
OPEN/CLOSE
SENSOR
REMOTE
RX771
~~
57
24
27
28
31
60 41 44 30 33 22 23
37
CD LCD
LCD771
PICKUP IN
PU-IN SW
19
13
14
SL+
SL–
SLD
SLEO
SPO
FD
TO
SL+
SL–
F
E
FIN1
FIN2
6
+
5
Q805
VCC1
LASER
DRIVER
SERV
O
LA9
2
IC
8
26
27
IC80
4
FOCUS/TRA
/SPIN/SLI
D
DRIV
E
BA592
0
M701
M702
SW702
RES SL–
DRF
WRQ
RESET
MUTE
VLC3
VDD
+5V
(D)
4.19MHz
X701
IC701
IX0105AW
SYSTEM
MICROCOMPUTER
COM0
SEG1 SEG4
COM3
CD LID
MUTE
SYNC.IN

GX-CD30/30C/130/130C
Figure 15 BLOCK DIAGRAM (2/4)
– 15 –
62
51
37
46
56
39
55
38
54
33
53
32
11
8
42
~
+5V
0
19 23 25
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
1
61 58 57
CL, DAT, SELIAL CONTROL
CONSTANT
VOLTAGE
REGULATOR
6
27 28 29
+7.4V
(CD)
1
2
3
4
5
GND (A)
R-CH
L-CH
GND (D)
CNP851
+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
+
–
1
2
64 62
+5V
Q
805
VCC1
LDO
L
ASER
RIVER
SERVO AMP.
LA9240M
IC801
22 2
+7.4V
7
5
6
8
28
13
IC804
C
US/TRACKING
S
PIN/SLIDE
DRIVER
BA5920FP

GX-CD30/30C/130/130C
– 16 –
Figure 16 BLOCK DIAGRAM (3/4)
CF2
10.7MHz
AM IF
T1
FM IF
P. B
REC
REC/PB
REC/PB
HEAD
L-CH
R-CH
T3
P. B
1
IC1
LA1186N
FM FRONT END
1
7
4
8
69
5
3
2
L2
FM OSC
FM
+B
L1
FM RF
BIAS
ERASE
HEAD
OSC.
REC
24
RF
REG.
MPX
OSC
A
M
L
E
F
M
3
22
23
IC2
LA1805
FM/AM
IF MPX.
G
ROD ANTENNA
21
9
13
16
23
4
2
1
15
1224
7
18
L
R
R
L
R
L
P.B
L-CH
R-CH
REC
19
T1/T2
T1/T2
P.B
Q351
L351
BEAT
CANCEL
RADIO
+B2
Q405
REC
L3
AM BAR ANT.
R-CH
3
CD
AUDIO GND
L-CH
CD+7.3V
POWER GND
Q252
T2 PB HEAD
T1
L (T2)
R (T2)
L (T1)
R (T1)
+B1
SW501-A, B
FUNCTION
POWER/
TAPE
2
1MUTE
SYNC. IN
SW201-B
REC/PB
M
TAPE
MOTOR
M601
REC/PB
SW201-A
REGULATO
R
VOLTAGE
TONE
VR532
A, B
SW351
RECORD/PLAYBACK
PLAYBACK AND
AMP.
IC201
LA7345K
C, D, E, F
SW201
SELECTOR
SW607
CNP603
FW851
FROM CD
SECTION
TO CD
SECTION
F1
B. P. F
RF AMP MIX OSC
VCC
13
S
S

GX-CD30/30C/130/130C
– 17 –
Figure 17 BLOCK DIAGRAM (4/4)
CF3
F
5
FM DET
T2
20 17
12
6
AGC
DET.
AM-IF
LEVEL-DET.
FM-IF DET. AMP.
POST
MUTE
DRIV.
TU DECODER
DET.
PHASE VCO FF FF
PILOT
DET. ST.
DRIV.
FF
48
19 18
9
10
ST.
SWIT.
21
7
15 141316 11
2
TRIG.
VCC
GND
FM +B
TUNER
+B
R
L
POWER AMP.
+B1
8
5
LA4597
IC501
MUTE
DRIVER
MUTING
Q551
Q552
Q554
[ “D” size (UM/SUM-1,
R20 or HP-2) battery x 8]
FUNCTION
POWER/
SW501-C
RADIO TUNER +B
455kHz A M
TUNER +B
T651
POWER
TRANSFORMER
BATTERY
DC 12V
+B1
D651~D654
RECTIFIER
VR1
VCO MONO
12
10
11
6
2
Q404
5
+B2
Q401 RIPPLE
FILTER
Q403
CD
TAPE
POWER/
SW501-D
FUNCTION
VOLUMEX-BASS
A
TOR
GE
E
VR531
A,B
3
2A, B
B
CNP552
TWEETER
SP3
L-CH
SP1
WOOFER
SP2
WOOFER
R-CH
TWEETER
SP4
SPEAKERS
+
–
–
+
J551
HEADPHONES
ONLY
CD130/130C
SW500
L4
AM OSC
POWER/FUNCTION
SW501-C
AC INPUT
AC 120V
60Hz
SO651
SW605 T1 MAIN
SW606 T2 MAIN
130C/30C
130/30
STAND-BY

GX-CD30/30C/130/130C
A
B
C
D
E
F
G
H
1234 5 6
The numbers 1 to 12 are waveform numbers shown in page 27.
Figure 18 SCHEMATIC DIAGRAM (1/5)
– 18 –
–
–+
+
DRF
+
–
REF
+
+
–
2FREQ
LASER
8/12CM
FOSTA
TOSTA
FSTA
SLOF
+
–
REF
REF
–
+
–
VCR
REF
REF –
+
OR
REF
REF
JP
LATCH
SLOF
JP+
JP–
REF
JP+
TGL
TOFF
TES
HFL
SLOF
CV+
REF
JP
PSTR
GEN
FSC
WCOMP
REF
FOF
REF
TO
JP
TO
FD
GEN
REF
REF
FD–
FA
FA–
FE
GEN +
–
+
–
+
–
+
–
+
–
AGND
SP
FE–
+
–
+
–
SPOF
SPI
SPG
SP–
REF
+
–
SL–
SL+
SLD
JP–
REF
TO
REF SLOF
+
–
+
–
SLEO
SPO
CV+
SLOF
CV–
REF +
–
+
–
REF
S.Q.R
VCC
TGL1 GL
THD
THDL
REF
TD–
TA
TH
TD
+
–
HIST. COMP
SHOCK;WCOMP
REF
REF
BAL
VCR
REF
TE
TE– +
–
+
–
FIN2
FIN1
E
F
TB
REF
FE1
VCR
+
–
+
–
LDS
VCC1
LDO
BHI
PHI
RF
+
–
LF2
VR
+
VCC2
FSS
REFI
VCC
+
–
DEF
HFL
DRF
CE
DAT
CL
CLK
DEF
THLD
FEBAL
NC
TBC
FSC
CE
CLK
CL
DAT
DGND
SLI
P-ON RES
REF RFS–
SLC
+–
RF RFSM
VCR
–
+
–
+
2.2V
1.8V
3V
0V
0V
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
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.2V
2.2V
2.5V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
5V
5V
5V
2.5V
2.5V
2.5V
5V
5V
2.5V
2.5V
5V
4.8V
1.5V
2.4V
2.5V
2.4V
4.1V
4.7V
0.9V
0.9V
2.1V
4.2V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
2V
5V
2.5V
5V
5V
5V
5V
5V
1.5V
0.3V
2.5V
4.8V
2.5V
0V
2.5V 0V 0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
5V
5V
5V
4.7V
2V
2V
4.7V
0V
2.3V
2V
0.1V
2.2V
2.5V
2.5V
4.1V
4.1V
2.7V
2.4V
C805
0.033
C808
0.068
R805
6.8K
R804
2.2K
C806
0.033
R806
100
C807
0.1/50
C811
0.1
IC801
LA9240M
Q805
KTA1266GR
C840
0.33/50
C849
0.022
C839
1/50
C838
0.01
C837
10/16
C835
0.1/50
R842
22
C848
1/50
R811
3.3K
R809
27K
R807
1K C809
0.047
C810
180P
R808
12K
R802
100K
C804
0.001
R810
82K
D802
1SS133 R849 100K
C821
1/50 C851
0.022
R839
22K
R828
1K
R840
22K
R829
1K
R824
10K
C820
0.0033
R830
1K
R831
1K
R820
10K
C818
1/50
C815
0.0047
R814
10K
R815
47K
C812
330P
R817
82K
C814
0.01 R816
1.5K
R821
56K
R822
6.8K
C816
0.001
C817
0.47/50
R823
1.2K
R825
1.2K
C819
47/10
C803
0.1/50
R803
15K
C813
0.1
R812
15K
R813
33K
C833
0.001
R838
33K
R837
47K
R832
56K
C834
0.033
R836
47K
R833
5.6K R834
1K
C832
27P
C831
0.0027
R835
470
C830
2.2P
C850
0.1
C845
4.7/50
R871
4.7K
C822
220P
R819
39K
+B
1
2
3
4
5
6
7
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
48
47
46
45
44
43
41
42
40
34
36
39
37
38
33
35
31 32
29 30
27 28 25 26 24
19 21 22 23 18 20
16
17
14
15
13
12
11
10
8
9
+B
R827
220K
R826
220K
1
CNP852
2
3
4
5
6
7
8
9
10
11
12
5
4
3
2
1
CNP851
+B
HF
VREF
GND
TE
SERVO AMP.
LASER DRIVER
DIGITAL GND
COIN
PUIN
WRQ
5V
D-GND
DRF
SQOUT
SL–
SL+
RWC
CQCK
RES
5V
WRQ
SQOUT
SL (–)
SL (+)
RWC
DRF
PU IN
CO IN
CQCK
RES
SERVO PWB-D
DIGTAL +7.4V
DIGITAL GND
L-CH
AUDIO GND
R-CH
CD SIGNAL
FW852
PWB
P26 6 - F
FW851
P22 4 - D
TO MAIN PWB
TO DISPLAY
9
8
7
6
5
4
3
2
1
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
32
31
PIN
NO. VOLTAGE
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
64
63
62
61
60
59
58
57
56
55
54
53
52
IC801
9
8
7
6
5
4
3
2
1
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
32
31
PIN
NO. VOLTAGE
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
64
63
62
61
60
59
58
57
56
55
54
53
52
IC802
PIN
NO. VOLTAGE PIN NO. VOLTAGE

GX-CD30/30C/130/130C
Figure 19 SCHEMATIC DIAGRAM (2/5)
78 9101112
NOTES ON SCHEMATIC DIAGRAM can be found on page 13.
– 19 –
XIN
XVSS
ISET
VVDD
VVSS
PDO
TA1
VSS
FR
DEFI
EFMO
VDD
TOFF
TGL
TEST3
INTERFACE
U-COM
OUT
DIGITAL
EXTERNAL
OUTPUT
DOUT
C2F
EMPH
CONT5 CONT1 CONT2 CONT3 CONT4
TEST4
NC
NC
MUTEL
LVDD
LCHO
LVSS
RVSS
RCHO
FILTER
4FS
DIGITAL
DAC
1BIT
RVDD
MUTER
XVDD
XOUT
EFLG
SBSY
PW
SFSY
SBCK
FSX
WRQ
RWC
COIN
/CQCK
SUB-CODE
GENERATOR
X-TAL
TST11
TEST5
/CS
TEST1
4M
SQOUT
/RES
16M
2K x 8BIT
RAM
VCO CLOCK
OSC CONTROL
ERROR
CORRECT
FLAG
CONTROL
EFM DEMODULATE
SYNC-DETECT
SLICE LEVEL
CONTROL
DIGITAL SERVO
CLV
V/P
HFL
TES
CLV–
CLV+
TEST2
EFMIN
COMMAND
SERVO
JP+
JP-
PCK
FSEQ
+
–
+
–
+–
+–
+
–
–
+
–
+
+– –+
VCC
VCC
+
–
7.4V
5.5V
4.9V
0V
0V
6.7V
0V
3.2V
0V
2.5V
2.5V
3.8V
0V
2.5V
3.5V
3.5V
2.5V
0V
3.5V
3.5V
2.5V
2.5V
2.5V
7.4V
7.4V
2.5V
2.7V
3.8V
3.2V
2.9V
2.9V
0V
R801
1K
C887
0.022
R880
100
C844
330/10
IC804
FOCUS/TRACKING/SPIN
SLIDE DRIVER
BA5920FP
C889
10/16
ZD801
MTZJ5.6B
R877
220
R878
100
Q804
CONSTANT
VOLTAGE
REGULATOR
2SD468 C
C846
330/10
C802
47/10 C801
0.01
C842
0.047
R857
27K
R858
680
C843
100/10 C873
0.01
C847
0.01 R860
1K
IC802
LC78622E
SERVO/SIGNAL
CONTOL
C841
0.047
R856
1.2K
XL801
16.93MHz
R874
100
R873
100
R875
10K
R876
10K
C867
10/16
C868
10/16
C890
100/10
C870
0.0022
C869
0.0022
+B
+B
+B
+B+B
+B
L801
0.82µH
+B
+B
+B
27
28
26
25
24
23
22
1
2
3
4
5
6
7
8
9
10
11
12
13
14
19
18
21
20
17
16
15
1
BI803
2
3
4
5
6
1
CNS803
2
3
4
5
6
SW702
M
M702
M
M701
1
CNP803
2
3
4
5
6
+B
+B
+B
1
BI801
2
3
4
5
6
7
8
1
CNS801
2
3
4
5
6
7
8
1
1
2
3
4
5
6
7
8
1
BI802
1
CNS802
2
3
4
5
2
3
4
5
2
3
4
5
+B
+B
29 30
27 2826 25
2422 23 20 211817 19
13
12
15
16
14
11
10
9
8
7
6
5
4
1
2
3
64 56 55 63 54
62 53 52
61 60 59 51 58 50 57 49
48
47
46
45
44
43
42
41
36
40
34
39
33
38
37
35
32
31
A
TR+
TR–
FO–
FO+
TR+
FO–
FO+
SP+
SP–
SL+
SL–
PU-IN
SERVO 7.4V
–
+
+
–
PICKUP IN
SLIDE MOTOR
SPIN MOTOR
CD MOTOR
PWB-E
TR–
TR+
FO+
FO–
GND
PD
VR
LD
K
E
F
C
K
E
A
B
F
A
B
TR–
FO+
TR+
FO–
LD
VR
PD
GND
F
B
A
E
K
1M
1M
LT0H30M1
2200P
2200P
1/16
FO–
FO+
TR+
TR–
ACTUATOR
LD
MON
PICKUP UNIT
E
B
K
F
TR–
L-CH
AUDIO GND
R-CH
DIGITAL GND
F–
F+

GX-CD30/30C/130/130C
– 20 –
Figure 20 WIRING OF P.W.BOARD (1/4)
A
B
C
D
E
F
G
H
1234 5 6
The numbers 1 to 12 are waveform numbers shown in page 27.
RX771
130/130C
ONLY
30/30C
ONLY
R735
X701
SW771
PLAY/REPEAT
PAUSE
SW775
R774
R773 R772
UP/CUE
SW773
R771
SW772
STOP
DOWN/ REVIEW
SW774
R723 R725 R722 R720 R719 R718 R732
R729
R726
R728
R731
R716
R733
C701
C702
R776
LCD771
R710
R708
R712
R709
R711
R779
R713
R734
R730
FW852 FW603
R724 R721
R727 R715 R742
R741
C741
R740
C740
D741
R743
D740
Q740
C704
C705 R714
FW772
13
12
1
3
1
1
2
3
1
2
3
164
5
10
15 16
17
20
25
30
40
35
1
3233
45
48
49 50
55 60
IC701
FW772
SW761
1 3
DISPLAY PWB-A2
SWITCH PWB-A5
2
3
4
5
6
7
8
TO MAIN PWB
CNP603
FW603
CD LID
OPEN/CLOSE
P25 10 - A