Sony HCD-GX40 - Electronic Component System User manual
HCD-GX40
US Model
Canadian Model
SERVICE MANUAL
MINI HI-FI COMPONENT SYSTEM
Sony Corporation
Home Audio Company
Published by Sony Engineering Corporation
9-874-011-02
2003J16-1
© 2003.10
•HCD-GX40 is the tuner, deck, CD and
amplifier section in MHC-GX40.
SPECIFICATIONS
Ver 1.1 2003. 10
Model Name Using Similar Mechanism New
CD CD Mechanism Type CDM58F-K6A
Section Optical Pick-up Name
KSM-213DCP/Z-NP
Tape deck Model Name Using Similar Mechanism HCD-GX10
Section Tape Transport Mechanism Type CWL43FF48
AUDIO POWER SPECIFICATIONS:
(USA model only)
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
with 6 ohms loads both channels driven, from
120 – 10,000 Hz; rates 60 watts per channel
minimum RMS power, with no more than 10%
total harmonic distortion from 250 milliwatts to
rated output.
Total harmonic distortion less than 0.07%
(6 ohms at 1 kHz, 30 W)
Amplifier section
Front speaker
Continuous RMS power output (reference)
60 + 60 watts (6 ohms at
1 kHz, 10% THD)
Total harmonic distortion less than 0.07%
(6 ohms at 1 kHz, 30 W)
Sub woofer
Continuous RMS power output (reference)
120 watts (12 ohms at
40 Hz, 10% THD)
Total harmonic distortion less than 0.07%
(12 ohms at 40 Hz, 60 W)
CD player section
System Compact disc and digital
audio system
Laser Semiconductor laser
(λ=780 nm)
Emission duration:
continuous
Frequency response 2 Hz – 20 kHz (±0.5 dB)
Wavelength 780 – 790 nm
Signal-to-noise ratio More than 90 dB
Dynamic range More than 90 dB
Tape deck section
Recording system 4-track 2-channel stereo
Frequency response 50 – 13,000 Hz (±3 dB),
using Sony TYPE I
cassette
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range 87.5 – 108.0 MHz
Antenna FM lead antenna
Antenna terminals 75 ohms unbalanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range –530 – 1,710 kHz (with the
interval set at 10 kHz)
531 – 1,710 kHz (with the
interval set at 9 kHz)
Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz
General
Power requirements 120 V AC, 60 Hz
Power consumption
Dimensions (w/h/d)
Mass Approx. 9.0 kg
140 watts
Supplied accessories: Remote Commander (1)
Batteries (2)
AM loop antenna (1)
FM lead antenna (1)
Front speaker pads (8)
Design and specifications are subject to change
without notice.
Approx. 280 ×325 ×412 mm
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TEL 13942296513 QQ 376315150 892498299
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2
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINEWITH
MARK 0ON THE SCHEMATIC DIAGRAMS AND INTHE PARTS
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE 0SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
After correcting the original service problem, perform the
following safety checks before releasing the set to the customer:
Checkthe antennaterminals, metaltrim, “metallized” knobs, screws,
and all other exposed metal parts forAC leakage. Check leakage as
described below.
LEAKAGE
The AC leakage from any exposed metal part to earth ground
and from all exposed metal parts to any exposed metal part having
a return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operatedAC voltmeter. The “limit” indication
is 0.75 V, so analog meters must have an accurate low-voltage
scale. The Simpson 250 and Sanwa SH-63Trd are examples of
a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2VAC range are suitable. (See
Fig. A)
SAFETY CHECK-OUT
HCD-GX40
To Exposed Metal
Parts on Set
0.15 µF1.5 kΩ
AC
Voltmeter
(0.75V)
Earth Ground
Fig.A. Using an AC voltmeter to check AC leakage.
The release method of a CD disc tray LOCK function
There is a disc lock function for the disc theft prevention for a
demonstration at a shop front in this machine.
Procedue:
1. Press the ?/1 button to turn the set on.
2. Press two buttons of xand OPEN/CLOSE simultaneously
for five seconds.
3. The message “LOCKED” is displayed and the tray is locked.
(Even if exiting from this mode, the tray is still locked.)
4. Press two buttons of xand OPEN/CLOSE simultaneously
for five seconds again.
5. The message “UNLOCKED” is displayed and the tray is
unlocked.
6. To exit from this mode, press the ?/1 button to turn the set
off.
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TEL 13942296513 QQ 376315150 892498299
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3
HCD-GX40
This appliance is classified as a CLASS 1 LASER product. The
CLASS 1 LASER PRODUCT MARKING is located on the rear
exterior.
Laser component in this product is capable
of emitting radiation exceeding the limit for
Class 1.
CAUTION
Use of controls or adjustments or performance of procedures
otherthan thosespecifiedherein may result in hazardousradiation
exposure.
Notes on chip component replacement
•Never reuse a disconnected chip component.
•Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
•Keep the temperature of soldering iron around 270˚C
during repairing.
•Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
•Be careful not to apply force on the conductor when soldering
or unsoldering.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick-
up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
TABLE OF CONTENTS
1. GENERAL ·········································································· 4
2. DISASSEMBLY ································································ 6
2-1. Case (Top) ····································································· 6
2-2. CD Door ········································································ 7
2-3. Front Panel Section ······················································· 7
2-4. CD Mechanism Deck (CDM58F-K6A) ························ 8
2-5. Tape Mechanism Deck (CWL43FF48) ························· 8
2-6. REM Board and PANEL Board ···································· 9
2-7. KEY BOARD Board ····················································· 9
2-8. Back Panel Section ······················································ 10
2-9. SUB TRANS Board and VIDEO OUT Board ············ 10
2-10.MAIN Board ······························································· 11
2-11.AMPLIFIER Board and POWER Board····················· 11
2-12.TRANS Board ····························································· 12
2-13.CD Board and DRIVER Board ··································· 12
2-14.SPDL Board ································································ 13
2-15.Optical Pick-up (KSM-213DCP/Z-NP) ······················13
2-16.MOTOR Board and ADDRESS SENSOR Board ······· 14
2-17.Table (New), Cam (Control) and
DC Motor (M721) ······················································· 14
3. TEST MODE···································································· 15
4. ELECTRICAL ADJUSTMENTS ······························· 17
5. DIAGRAMS······································································ 19
5-1. Circuit Boards Location ·············································· 19
5-2. Block Diagrams ··························································· 20
5-3. Printed Wiring Boards – CD Section (1/2) –··············· 22
5-4. Printed Wiring Boards – CD Section (2/2) –··············· 23
5-5. Schematic Diagram – CD Section –···························· 24
5-6. Printed Wiring Board – MAIN Section – ···················· 25
5-7. Schematic Diagram – MAIN Section (1/4) – ·············· 26
5-8. Schematic Diagram – MAIN Section (2/4) – ·············· 27
5-9. Schematic Diagram – MAIN Section (3/4) – ·············· 28
5-10.Schematic Diagram – MAIN Section (4/4) – ·············· 29
5-11.Printed Wiring Boards – PANEL Section – ················ 30
5-12.Schematic Diagram – PANEL Section – ····················· 31
5-13.Printed Wiring Boards
– POWER/TRANS Section – ······································ 32
5-14.Schematic Diagram
– POWER/TRANS Section – ······································ 33
5-15.Printed Wiring Board –AMPLIFIER Section –·········· 34
5-16.Schematic Diagram – AMPLIFIER Section – ············ 34
5-17.IC Pin Function Description········································ 38
6. EXPLODED VIEWS ······················································ 40
6-1. Main Section ······························································· 40
6-2. Front Panel Section ····················································· 41
6-3. MAIN Board Section ·················································· 42
6-4. CD Mechanism Deck Section (CDM58F-K6A) ········· 43
7. ELECTRICAL PARTS LIST ······································· 44
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TEL 13942296513 QQ 376315150 892498299
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4
HCD-GX40
This section is extracted
from instruction manual.
SECTION 1
GENERAL
BUTTON DESCRIPTIONS
?/1 (power) 1
ZOPEN/CLOSE qs
Z(deck B) qg
M qk
.qk
>qk
Xqk
Nqk
xqk
mqk
Z(deck A) wa
Main unit
ALPHABETICAL ORDER
A – E
AUDIO jacks ws (24)
CD wj (11, 12, 18)
CD SYNC 7(18)
Deck Aw; (16, 17)
Deck Bqh (16 – 19)
DISC 1 – 3 0(11, 12)
DISC SKIP/EX-CHANGE qa (10,
11)
Disc tray 9(10)
DISPLAY 2(16, 21)
EFFECT ON/OFF qj (20)
G – Z
GAME wf (22, 24)
GAME EQ ql (20, 24)
GAME MIXING 4(22)
GROOVE 6(20)
MOVIE EQ 5(20)
MUSIC EQ 9(20)
PHONES jack qf
REC PAUSE/START 8(18)
TAPE A/B wg (16, 18)
TUNER/BAND wh (13 – 15, 18)
VIDEO jack wd (24)
VOLUME control qd
123 549
0
678
qd
qf
qg
qh
qa
qs
qjqkql
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wa
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ws
wf
wg
wh
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TEL 13942296513 QQ 376315150 892498299
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5
HCD-GX40
Setting the clock
1Press ?/1 to turn on the system.
2Press CLOCK/TIMER SET on the
remote.
3Press .or >on the remote
repeatedly to set the hour.
4Press ENTER on the remote.
The minute indication flashes.
5Press .or >on the remote
repeatedly to set the minute.
6Press ENTER on the remote.
The clock starts working.
To adjust the clock
1Press CLOCK/TIMER SET on the remote.
2Press .or >on the remote to select
“CLOCK SET”, then press ENTER on the
remote.
3Do the same procedures as step 3 to 6
above.
Note
The clock settings are canceled when you disconnect
the power cord or if a power failure occurs.
12 34
5
6
7
8
9
0
qa
qs
qd
qf
qg
qh
qj
qk
ql
w;
wa
Remote Control
ALPHABETICAL ORDER
A – G
CD ql (11, 12, 18)
CLEAR w; (12)
CLOCK/TIMER SELECT 2
(19, 23)
CLOCK/TIMER SET 9(10, 19,
23)
DISPLAY 6(16, 21)
D.SKIP 7(11)
ENTER qg (10, 12 – 14, 19, 23)
EQ +/– qf (20)
GAME 0(22, 24)
GROOVE qd (20)
O – Z
ON/OFF qh (20)
PLAY MODE wa (11, 12, 17)
PRESET +/– 5(13 – 15)
REPEAT 8(11)
SLEEP 1(22)
STEREO/MONO 8(15)
SURROUND qa (20)
TAPE A/B 9(16, 18)
TUNER MEMORY qj (13, 14)
TUNER/BAND qk (13 – 15, 18)
TUNING +/– 5(13 – 15)
VOL +/– qs
BUTTON DESCRIPTIONS
?/1 (power) 4
M5
.5
>5
X5
N5
m5
x5
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TEL 13942296513 QQ 376315150 892498299
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HCD-GX40 SECTION 2
DISASSEMBLY
Note : Disassemble the unit in the order as shown below.
Note : Follow the disassembly procedure in the numerical order given.
2-1. Case (Top)
case (Side-R)
case (Side-L)
5
qd
qs
qs
q;
qf
case (Top)
6
two screws (Case 3 TP2)
8
screw
(+BVTP 3
×8
)
3
screw
(+BVTP 3
×8
)
9
screw
(+BVTT 3
×
8)
4
screw
(+BVTT 3
×
8)
1
two screws
(Case 3 TP2)
qa
four screws (+BVTP 3
×
10)
7
screw (Case 3 TP2)
2
screw (Case 3 TP2)
CD DOOR CD MECHANISM DECK (CDM58F-K6A)CASE (TOP) FRONT PANEL SECTION
BACK PANEL SECTION
KEY BOARD BOARDREM BOARD AND PANEL BOARDTAPE MECHANISM DECK (CWL43FF48)
MOTOR BOARD AND
ADDRESS SENSOR
BOARD
SET
OPTICAL PICK-UP (KSM-213DCP/Z-NP)
TRANS BOARD
SUB TRANS BOARD AND VIDEO OUT BOARD
AMPLIFIER BOARD AND
POWER BOARD
SPDL BOARD
MAIN BOARD
CD BOARD AND DRIVER BOARD
TABLE (NEW),CAM (CONTROL) AND
DC MOTOR (M721)
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TEL 13942296513 QQ 376315150 892498299
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7
HCD-GX40
2-2. CD Door
2-3. Front Panel Section
2
Pull-out the disc tray.
1
Turn the pulley to the direction of arrow.
pulley
4
CD door
Front panel side
CD mechanism deck (CDM58F-K6A)
3
1
three screws (+BVTT 3
×
6)
9
wire (flat type) 13p (CN207)
7
wire (flat type)
19p (CN733)
qa
connector 7p (CN202)
qs
front panel
0
connector 3p (CN303)
8
connector 3p (CN201
)
6
connector 2p (CN682)
3
screw (+BVTP 3
×
10)
4
screw (+BVTP 3
×
10)
2
screw (+BVTP 3
×
10)
5
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TEL 13942296513 QQ 376315150 892498299
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8
HCD-GX40
2-4. CD Mechanism Deck (CDM58F-K6A)
2
connector 7p (CN734)
4
CD mechanism deck (CDM58F-K6A)
3
1
screw (+BVTP 3
×
10
)
2-5. Tape Mechanism Deck (CWL43FF48)
1
six
screws
(+BVTP 2.6
×
8
)
2
three ground wires
3
tape mechanism deck
(CWL43FF48)
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TEL 13942296513 QQ 376315150 892498299
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9
HCD-GX40
2-6. REM Board and PANEL Board
5
Remove the solderin
g
(three portions)
4
connector
13p (CN662)
four
claws
two claws
claw
7
PANEL board
6
REM
board
REM
board
1
volume knob
2
3
eight
screws
(+BVTP 2.6
×
8
)
2-7. KEY BOARD Board
2
KEY BOARD board
two claws
three claws
1four
screws
(+BVTP 2.6
×
8
)
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10
HCD-GX40
2-8. Back Panel Section
3
connector
3p (CN903)
6
1four
screw
(+BVTP 3
×
10
)
2two
screw
(+BVTT 3
×
6)
4
connector
2p (CN301)
5
connector
2p (CN505)
7back panel
2-9. SUBTRANS Board andVIDEO OUT Board
5two
screws (+BVTP 3
×
10)
1two
screws
(+BVTP 3
×
10)
2SUB TRANS board
4VIDEO OUT board
7two
screws (+BVTP 3
×
10
)
3
screw (+BVTP 3
×
10)
8DC fan (M961)
6cover (duct)
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11
HCD-GX40
2-10. MAIN Board
2-11. AMPLIFIER Board and POWER Board
2
three screws (+BVTT 3
×
6)
3
1two
screws (+BVTT 3
×
6)
qd
heat sink
4two
screws (+BVTP 3
×
6)
qa two
screws (+BVTP 3
×
6)
qs
AMPLIFIER
board
6POWER
board
7
screw (+BVTT 3
×
6)
8
screw (+BVTT 3
×
6)
0t
wo screws (+BVTP 3
×
6)
9
connector 7p (CN508)
5
connector 13p (CN915)
2
connector 3p (CN509)
4
connector 13p (CN502)
3
connector 13p (CN503)
Main board
1two
screws
(+BVTT 3
×
6)
5
MAIN boar
d
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TEL 13942296513 QQ 376315150 892498299
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12
HCD-GX40
2-12. TRANS Board
3TRANS boar
d
1two
screws (+BVTT 4
×
6)
2two
screws (+BVTT 4
×
6)
2-13. CD Board and DRIVER Board
3
four s
crews (+BTTP M2.6
)
4
2
wire (flat type)
16p (CN731)
7
wire (flat type)
8p (CN702)
8
DRIVER board
5
CD board
6
screw (+BTTP M2.6
)
1
connector 10p (CN735)
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13
HCD-GX40
2-14. SPDL Board
1Remove solder (four places).
2Remove solder (four places).
3SPDL board
2-15. Optical Pick-up (KSM-213DCP/Z-NP)
0
optical pick-up
(KSM-213DCP/Z-NP)
9
5two
screws (+PTPWH M2.6
)
1
screw (+PTPWH M2.6)
6
screw (DIA. 12)
3
two screws (+BVTP 2.6
×
8)
8
two insulators
2
holder (BU) assy
7
two insulators
4
two stoppers (BU)
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TEL 13942296513 QQ 376315150 892498299
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14
HCD-GX40
2-16. MOTOR Board and ADDRESS SENSOR Board
1
Pull out the disc tray.
5
two
screws (+BVTP 2.6
×
8)
2
screw (+PTPWH 2.6
×
8)
3
tray
8
screw (+BVTP 2.6
×
8)
7
MOTOR board
9
ADDRESS SENSOR board
6
Remove the two solderings of motor.
4
connector 4p (CN722)
2-17. Table (New), Cam (Control) and DC Motor (M721)
*Cautions of an assembly
7
DC
motor (M721)
claw
claw
6
belt
5
pulley (S)
4
gear (U)
2
screw (STEP)
3
cam (CONTROL)
1
table (NEW)
DC
motor (TURN)
pulley (S)
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15
HCD-GX40
SECTION 3
TEST MODE
[Change-over of AM Tuner Step between 9 kHz and
10 kHz]
•Astep ofAM channels can be changed over between 9 kHz and
10 kHz.
Procedure:
1. Press ?/1button to turn the set ON.
2. Select the function “TUNER”, and press TUNER/BAND
button to select the BAND “AM”.
3. Press ?/1button to turn the set OFF.
4. Press TUNER/BAND and ?/1buttons simultaneously, and
the display of fluorescent indicator tube changes to “AM 9 k
STEP”or “AM10 k STEP”,and thusthe channelstep ischanged
over.
[Cold Reset]
•The cold reset clears all data including preset data stored in the
RAM to initial conditions. Execute this mode when returning
the set to the customer.
Procedure:
1. Press three buttons x, GROOVE , and ?/1simultaneously.
2. The fluorescent indicator tube displays “COLD RESET” and
the set is reset.
[Aging Mode]
This mode can be used for operation check of CD section and tape
deck section.
•If an error occurred:
The aging operation stops and is displayed status.
•If no error occurs:
The aging operation continues repeatedly.
1. Operating method of Aging Mode
Turn on the main power and select “CD” of the function.
1) Set three discs in tray. SelectALL DISCS, and REPEAT OFF.
2) Load the tapes recording use into both decks.
3) Press three buttons x, GAME EQ , and
DISC SKIP/EX-CHANGE simultaneously.
4) Aging operations of CD and tape are started at the same time.
5) To exit the aging mode, perform [Cold Reset].
2. Aging mode in CD section
1) Operation during aging mode
•In the agining mode ,the program is excuted in the following
sequence.
(1) The disc tray opens and closes.
(2) The disc tray turns to select a disc 3.
(3) The pickup accesses to the first track, and plays 3 seconds.
(4) The pickup accesses to the last track, and plays 3 seconds.
(5) The disc tray opens and closes.
(6) The disc tray turns to select a disc 1.
(7) The same operation starts like step (3).
(8) After a disc 1 aging operation, a disc 2 is selected.
(9) When an aging operation of a disc 3 is completed, the display
“AGING ∗∗∗∗” value increases.
(10) If no error occurs, the aging operation continues repeatedly.
2) Error display
Step
1
2
3
4
5
6
7
8
9
10
11
12
Operation
Rewind the TAPE A
Rewind the TAPE B
Play the TAPE A (1 minute)
Stop the TAPE A (1 second)
Play the TAPE A (3 minutes)
Rewind(AMS) the TAPE A
F.F.(AMS) the TAPE A
Play the TAPE B (1 minute)
Stop the TAPE B (1 second)
Record the TAPE B (3 minutes)
Rewind(AMS) the TAPE B
F.F.(AMS) the TAPE B
Display
TAPE AAG-1
TAPE BAG-2
TAPE AAG-2
TAPE AAG-3
TAPE AAG-4
TAPE AAG-5
TAPE AAG-6
TAPE BAG-2
TAPE BAG-3
TAPE BAG-4
TAPE BAG-5
TAPE BAG-6
Disc error
Display Error
E00D01022 Focus error (No disc)
E00D02022 Sub Q error (Focus is good)
E00D02023 TOC reading error
E00D02014 Access error (Unable within regular time)
Mechanism error
Display Error
E00M__E_0 Error during opening tray
E00M__C_2 EX-CHANGE disc error
E00M__D_0 Error during closing tray
E00M__F_3 EX-OPEN error
E00M__D_5 EX-CLOSE error
E00M__C_2 Chuck-up error
E00M__C_3 Unchucking error
3. Aging mode in Tape Deck section
1) Operation during aging mode
•In the agining mode, the program is excuted in the following
sequence.
2) Error display
•If error occurred, the display remains like “TAPE BAG-2”.
4. Exiting from the aging mode
•Be sure to perform Cold Reset to exit from the aging mode.
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TEL 13942296513 QQ 376315150 892498299
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16
HCD-GX40
[MCTest Mode]
•This mode is used to test the function of the equalizer.
Procedure:
1. Press ?/1button to turn the set ON.
2. To enter the test mode, press the three buttons x , GAME EQ
and DISC 3 simultaneously.
3. Press the MOVIE EQ button.
The function of the equalizer is set to “MIN”.
4. Press the MUSIC EQ button.
The function of the equalizer is set to “MAX”.
5. Press the P.FILE button.
The function of the equalizer is set to “FLAT”.
6. To exit from this mode, press ?/1button to turn the set OFF.
[CD Ship Mode (No Memory Clear) ]
•This mode moves the pickup to the position durable to vibra-
tion. Use this mode when returning the set to the customer after
repair.
Procedure:
1. Press ?/1button to turn the set ON.
2. Select the function “CD”.
3. Press ?/1button to turn the set OFF.
4. Press CD button and ?/1button simultaneously.
5. The "STANDBY" display blinks instantaneously, and the CD
ship mode is set.
[DiscTray Lock]
Procedure:
1. Press the ?/1 button to turn the set on.
2. Press two buttons of xand OPEN/CLOSE simultaneously
for five seconds.
3. The message “LOCKED” is displayed and the tray is locked.
(Even if exiting from this mode, the tray is still locked.)
4. Press two buttons of xand OPEN/CLOSE simultaneously
for five seconds again.
5. The message “UNLOCKED” is displayed and the tray is
unlocked.
6. To exit from this mode, press the ?/1 button to turn the set
off.
[GCTest Mode]
•All fluorecent segments and LEDs are tested.
•Keyboard check.
Procedure:
1. Press ?/1button to turn the set ON.
2. To enter the test mode, press the three buttons x , GAME EQ
and DISC 2 simultaneously.
3. All segments and LEDs (without STANDBY LED) are turned
on.
4. Press GAME EQ and DISC 2 buttons simultaneously, and the
key check mode is activated.
5. The message “KEY 0 0 0 0” is displayed.
Each time a button is pressed, the key code number is displayed.
6. Press GAME EQ and DISC 2 buttons simultaneously, and the
key count mode is activated.
7. The message “KEYCNT 0 1” is displayed.
Each time a button is pressed, “KEYCNT 0 1” value increased.
However, once a button is pressed, it is no longer taken into
account.
8. Press GAME EQ and DISC 2 buttons simultaneously, and the
head phone detect mode is activated.
9. The message “H_P OFF” is displayed when a headphone jack
is not inserted.
“H_P ON ” is displayed when a headphone jack is inserted.
10. Press GAME EQ and DISC 2 buttons simultaneously, and the
volume control detect mode is activated.
11. The message “VOLUME FLAT” is displayed.
“VOLUME UP” is displayed if rotating VOLUME knob
clockwise, or “VOLUME DOWN” is displayed if rotating
counterclockwise.
12. To exit from the GC test mode after the volume control detect
mode, press GAME EQ and DISC 2 buttons simultaneously.
[Version and Destination Display Mode]
•The version or destination is displayed.
Procedure:
1. Press ?/1button to turn the set ON.
2. To enter the test mode, press the three buttons x , GAME EQ
and MOVIE EQ simultaneously.
3. The destination is displayed.
4. Press STOP and GROOVE buttons simultaneously.
5. The version is displayed.
6. To exit from this mode, press ?/1button to turn the set OFF.
[CD Service Mode]
•This mode can run the CD sled motor freely. Use this mode, for
instance, when cleaning the pickup.
Procedure:
1. Press ?/1button to turn the set ON.
2. Select the function “CD”.
3. To enter the test mode, press three buttons x, GAME EQ ,
and OPEN/CLOSE simultaneously.
4. The CD service mode is selected.
5. With the CD in stop status, press > button to move the pickup
to outside track, or press . button to inside track.
6. To exit from this mode, perform as follows:
1) Move the pickup to the most inside track.
2) Press ?/1button to turn the set OFF.
Note: • Always move the pickup to most inside track when exiting from
this mode. Otherwise, a disc will not be unloaded.
•Do not run the sled motor excessively, otherwise the gear can be
chipped.
+
–
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TEL 13942296513 QQ 376315150 892498299
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17
HCD-GX40
SECTION 4
ELECTRICAL ADJUSTMENTS
FMTuned Level Adjustment
Procedure:
1. Supplya 98MHz signalat 28 dB from theANTENNA terminal.
2. Tune the set to 98 MHz.
3. Adjust RV101 to the point (moment) when the TUNED
indicator will change from going off to going on.
Adjustment Location: MAIN board
Null Adjustment
Procedure:
1. Supplya 98MHz signalat 60 dB from theANTENNA terminal.
2. Tune the set to 98 MHz.
3. Measure voltage between pin 21 and pin 23 of IC 101. Adjust
T101 until the voltage becomes 0V.
Adjustment Location: MAIN board
FM RF Signal generator
75
Ω
coaxial
Carrier frequency : 98 MHz
Modulation : AUDIO 1 kHz, 75 kHz
deviation (100%)
Output level : 30 dB (at 75
Ω
open)
FM ANTENNA terminal
(JK103)
set
FM RF Signal generator
75
Ω
coaxial
Carrier frequency : 98 MHz
Modulation : AUDIO 1 kHz, 75 kHz
deviation (100%)
Output level : 60 dB (at 75
Ω
open)
FM ANTENNA terminal
(JK103)
set
T101: NULL
IFT101: AM IF
RV101:
FM TUNED LEVEL
TUNER SECTION
AM RF Signal generator
30% amplitude
modulation by
400Hz signal
output level : as low as possible
AM ANTENNA termina
l
(JK103)
set
AM IF Adjustment
Procedure:
1. Set the frequency of theAM RF signal generator to 1000 kHz
(at 10 kHz step) or 999 kHz (at 9 kHz step).
2. Tune the set toAM 1000 kHz (at 10 kHz step) or 999 kHz (at 9
kHz step).
3. Adjust IFT101 so that the reading on level meter becomes in
maximum.
headphones jack (JK691)
level mete
r
set
16
Ω
[MAIN BOARD] Component side
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TEL 13942296513 QQ 376315150 892498299
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18
HCD-GX40
CN731
TP731:
TP connected to pin
q;
(IC751)
IC751
CN733
IC731
Adjustment Location: CD board
[CD BOARD] (Component Side)
CD SECTION
RF Level Check
Procedure :
1. Connect oscilloscope to pin q; (IC751).
2. Turned Power switch on.
3. Load a disc (YEDS-18) and playback.
4. Confirmthat oscilloscopewaveformis clearand checkRF signal
level is correct or not.
IC751 pin q;
GND
CD board oscilloscope
Note : Clear RF signal waveform means that the shape “ ◊” can be clearly
distinguished at the center of the waveform.
RF signal waveform VOLT/DIV : 200mV
TIME/DIV : 500ns
level : 1.4 to 2.1Vp-
p
Note :
1. CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.
2. UseYEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10MΩimpedance.
4. Clean the object lens by an applicator with neutral detergent
when the signal level is low than specified value with the
following checks.
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TEL 13942296513 QQ 376315150 892498299
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1919
HCD-GX40
SECTION 5
DIAGRAMS
Note on Schematic Diagram:
•All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
•All resistors are in Ωand 1/4W or less unless otherwise
specified.
•f: internal component.
•C: panel designation.
Note on PrintedWiring Boards:
•X: parts extracted from the component side.
•b: Pattern from the side which enables seeing.
•Indication of transistor.
Note:
The components identi-
fied by mark 0or dotted
line withmark 0are criti-
cal for safety.
Replace only with part
number specified.
Note:
Lescomposants identifiés par
une marque 0sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
•A: B+ Line.
•B: B– Line.
•H: adjustment for repair.
•Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
•Voltages aretaken withaVOM(Input impedance10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
no mark : FM
< >:CD
[]:TAPE
•Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
•Circled numbers refer to waveforms.
•Signal path.
F: FM
E: PB (DECK A)
d: PB (DECK B)
G: REC (DECK B)
J: CD
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
C
B
These are omitted. E
Q
B
These are omitted.
CE
Q
5-1. Circuit Boards Location
•Waveforms
KEY BOARD board
PANEL board
SUB TRANS board
MAIN board
CD board
SENSOR board
TRANS board
VIDEO OUT board
POWER board
DRIVER board
MOTOR board
SPDL board
ADDRESS SENSOR board
REM board
AMPLIFIER
board
5
Q209 Collector
(TAPE REC mode)
2
IC601 qd (XT2)
1
IC751 rf (XOUT)
4
IC102 ws (XOUT)
2 V/DIV, 100 ns/DIV
5 V/DIV, 10 s/DIV
2 V/DIV, 10 s/DIV
2 V/DIV, 20 ns/DIV
3
IC601 qh (CF2)
2 V/DIV, 40 ns/DIV
5.2 Vp-p
5.6 Vp-p
59 ns 222 ns
30.5 s
4.9 Vp-p
100 ns
5.0 Vp-p
13.5 Vp-p
17 s
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TEL 13942296513 QQ 376315150 892498299
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2020
HCD-GX40
5-2. Block Diagrams
CD Section
: CD
• Signal Path
• R-CH is omitted due to same as L-CH
OPTICAL PICK-UP
BLOCK
LD
DRIVER
Q731
+5V
LD
GND
FOCUS
COIL
F+
F
T+
T
TRACKING
COIL
IC781
FCS/TRK COIL,
SL/SP MOTOR
DRIVER
SLED/SPINDLE SERVO,
RF AMP
IC731
1
25
2
27
26
VR
PD
11
12
18
17
3
9
20
7
MUTE
CH1OUT-A
CH1IN-A
CH1IN-B
CH4IN-A
CH2IN-B
CH3IN-B
CH1OUT-B
CH4OUT-A
CH4OUT-B
CH2OUT-B
CH2OUT-A
CH3OUT-B
CH3OUT-A
M
M
(SLED)
(SPINDLE)
S01
(LIMIT)
41
RF SM
VR
58
VCC
VC
A
B
C
D
E
F
DETECTOR
FOCUS/TRACKING/
FIN 1
FIN 2
E
3
F
4
LDD
62
LDS
63
FD
16
TO
15
SLD
29
SPD
27
52
DAT
50
CLK
51
CL
53
CE
34
TGL
54DRF
39
CV-
40
CV+
Q775
30
SL-
31
SL+
35
TOFF
44
SLI
49
DEF
36
TES
37
HFL
33JP+
32JP-
DIGITAL SIGNAL
PROCESSOR
IC751
EFMI
10
EFMO
9
DEF
1
TES
16
HFL
15
JP+
19
JP-
20
COIN
56
4.2M
61
CQCK
57
RWC
54
TGL
18
TOFF
17
SHUTER IN/OUT
28
CLV+
12
CLV-
13
LIMIT SW
27
53
WRQ
55
SQOUT
3
PDO
45
XIN
44
XOUT
X701
16.9344MHz
37
LCHO
40
RCHO R CH
58
RES
CD CHANGER
CONTROL
IC601 (1/3)
69
99
WRQ
SQOUT
COIN
98
CD RESET
76
SQCK
100
CD RWC
6
CD DRF
68
CD SLED(+)
74
CD SLED(-)
75
D732
IC701
MOTOR
DRIVER
9
7
M
4
2
71
CD NUMBER SENSOR
70CD BUSY
(PIC UP/DOWN)SW
80
CD OPEN
TABLE
SENSOR
IC711
S701
A
MAIN
SECTION
CD-L
2
1
38SLOF RF GAIN
24
4
D_MUTE
26
Q774
MUTE
Q771
73 CD MUTE
67
CD CLOSE
4CD MOTOR+
5CD MOTOR-
M721
(TURN)
S711
(UP/DOWN)
(OPEN/CLOSE)
w
w
w
.
x
i
a
o
y
u
1
6
3
.
c
o
m
Q
Q
3
7
6
3
1
5
1
5
0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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