Service Manuals, User Guides, Schematic Diagrams or docs for : ONKYO Audio DX-7555 hfe_onkyo_dx-7555_service_en
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DX-7555
Ref. No. 3911
122005
SERVICE MANUAL / 092006
COMPACT DISC PLAYER ON STANDBY
OPEN/CLOSE
MODEL DX-7555
1 2 3
SEARCH
4 5 6
MEMORY
7 8 9
ENTER
10 10/0 CLR
DIMMER DISPLAY
ENTER
SETUP
RANDOM REPEAT
RC-625C
Black, Silver and Golden models
BMPP 230-240V AC, 50Hz
SMPP 230-240V AC, 50Hz
GMGT 220-230V AC, 50/60Hz
GMGR 220-230V AC, 50/60Hz
GMDT 120V AC, 60Hz
BMDC 120V AC, 60Hz
SMDC 120V AC, 60Hz
SAFETY-RELATED COMPONENT
WARNING!!
COMPONENTS IDENTIFIED BY MARK ON THE
SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE
CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK.
REPLACE THESE COMPONENTS WITH ONKYO
PARTS WHOSE PART NUMBERS APPEAR AS SHOWN
IN THIS MANUAL.
MAKE LEAKAGE-CURRENT OR RESISTANCE
MEASUREMENTS TO DETERMINE THAT EXPOSED
PARTS ARE ACCEPTABLY INSULATED FROM THE
SUPPLY CIRCUIT BEFORE RETURNING THE
APPLIANCE TO THE CUSTOMER.
DX-7555
SPECIFICATIONS
Signal readout : Optical non-contact
Frequency response : 2 Hz - 20 kHz
SN ratio : 111 dB
Audio dynamic range : 100 dB
THD (total harmonic distortion) : 0.0027%
Audio output
Digital optical : -22.5 dBm
Audio output / Impedance
Digital coaxial : 0.5 Vp-p, 75 ohm
Audio output / Impedance
Analog : 2.0 V (rms), 470 ohm
Power supply : AC 230 - 240 V, 50 Hz
AC 220 - 230 V, 50/60 Hz
AC 120 V, 60 Hz
Power consumption : 16 W / 14 W
Standby power consumption : European : 0.5 W
North American : 0.3 W
Others : 0.4 W / 0.3 W
Dimensions (W x H x D) : 435 x 111 x 405 mm
Weight : 8.0 kg
Operation condition
Temperature, humidity : 5 - 35 , 5 - 85 % (no condensation)
Supported discs : CD, CD-R, CD-RW, MP3
(Discs that have not been properly finalized may only be
partially playable or not playable at all.)
Specifications and appearance are subject to change for
improvement without prior notice.
DX-7555
SERVICE PROCEDURE-1
PROTECTION OF EYES FROM LASER BEAM DURING SERVICING
This set employs a laser. Therefore, be sure to follow Laser Diode Properties
carefully the instructions below when servicing.
Material: GaAS/GaAlAs
Wavelength: 760-800nm
WARNING!! Laser output: max. 0.5mW*
SERVICE WARNING : DO NOT APPROACH THE Emission Duration: continuous
LASER EXIT WITH THE EYE TOO CLOSELY. *This output is the value measured at a distance about 1.8mm
IN CASE IT IS NECESSARY TO CONFIRM LASER from the objective lens surface on the Optical Pickup Block.
BEAM EMISSION, BE SURE TO OBSERVE FROM
A DISTANCE OF MORE THAN 30cm FROM THE
SURFACE OF THE OBJECTIVE LENS ON THE
OPTICAL PICKUP BLOCK.
LASER WARNING LABEL
The labels shown below are affixed.
1. Warning label
DANGER:
INVISIBLE LASER RADIATION WHEN OPEN AND
INTERLOCK FAILED OR DEFEATED. AVOID DIRECT
EXPOSURE TO BEAM.
CAUTION:
HAZARDOUS LASER AND ELECTROMAGNETIC
RADIATION WHEN OPEN AND INTERLOCK DEFEATED.
ATTENTION:
RAYONNEMENT LASER ET ELECTROMAGNETIQUE
DANGEREUX SI OUVERT AVEC L'ECLENCHEMENT
DE SECURITE ANNULE.
2. Class 1 label
LUOKAN 1
CLASS 1 LASER LASERLAITE
PRODUCT KLASS 1
LASER APPARAT
Printed on rear panel
PRECAUTIONS
1. Ground for the work-desk. 3. Grounding for the human body.
Place a conductive sheet such as a sheet of copper Be sure to put on a wrist-strap for grounding whose
(with impedance lower than 10 Mohm) on the work- other end is grounded.
desk and place the set on the conductive sheet so that Be particularly careful when the workers wear
the chassis can be grounded. synthetic fiber clothes, or air is dry.
2. Grounding for the test equipments and tools. 4. Select a soldering iron that permits no leakage and
Test equipments and toolings should be grounded in have the tip of the iron well-grounded.
order that their ground level is the same the ground of 5. Do not check the laser diode terminals with the
the power source. probe of a circuit tester or oscilloscope.
DX-7555
SERVICE PROCEDURE-2
1. Initialize the unit.
(1) Press and hold down the STOP [ ] button, then press the FF (fast forward) [ ] button. All segments light up.
(2) Press and hold down the STOP [ ] button, then press the PUSH TO ENTER (JOG) button.
FL display
0 0:00 ---> NO DISC
(3) Press the POWER button to turn off the unit.
(4) Disconnect the AC power cord from a wall outlet.
2. Check the version of Main microprocessor (Q8005) and Servo microprocessor (Q1001).
(1) Connect the AC power cord into a wall outlet.
(2) Press the POWER button to turn on the unit.
(3) Change into the state of "NO DISC".
(4) Press and hold down the STOP [ ] button, then press the FF (fast forward) [ ] button twice.
The first press lights up all segments.
Main microprocessor version ---> Servo microprocessor version
FL display
MA 050830A ---> SRV 5805A ---> MODEL00 00 ---> NO DISC
(5) Press the POWER button to turn off the unit.
(6) Disconnect the AC power cord from a wall outlet.
3. Setting position before shipment.
(1) POWER button : OFF
(2) PHONES LEVEL : MIN.
4. Take out the Disc.
If cannot take out the disc, please take out disc as follows.
(1) The lever in the direction of the arrow.
(2) The tray is slowly drawn out by the hand.
--- Bottom view ---
Lever
Front panel
DX-7555
A141
EXPLODED VIEW
A141 D U10 A026 A018
A901 x 3 pcs.
U02 E004
E006
A110
x 10 pcs. A109
P901
A C U01
B
A124
P1002 A090
C P7001 A024
A105 Z008
D P1003 A x 4 pcs.
x 4 pcs.
B
Refer to
"EXPLODED VIEWS With MECHANISM A012
OF MECHANISM" x 10 pcs. U06
A073 A072 A028 A010
x 3 pcs. A030 A012
A090 x 2 pcs. A088 x 6 pcs.
U04 A004
A006 U09 x 2 pcs. A044
L001 E012 A126
A141 A012
A090 x 6 pcs.
E011 U08
T902 A090 A012
A090 A130 A012 A012
U03 A052 x 2 pcs. A090
U05 A128 A012 x 3 pcs.
U07 A020
A032 A040
A076
x 4 pcs. A068
A070
x 2 pcs. A042
A012
A060 x 2 pcs. A034
A002 x 2 pcs. A048
A058
A012
x 5 pcs.
A036 A066
A014
x 4 pcs. A062
A038
A108
A100
A016 A102
DX-7555
A136 A074 A074
x 2 pcs. x 4 pcs.
x 4 pcs. A103 x 8 pcs. A104
A060 x 4 pcs. x 3 pcs.
x 2 pcs. A056
DX-7555
EXPLODED VIEWS OF MECHANISM-1
CD LOADER MECHA. Z001 : MGD-34
Parts No. 24800055C
18
CD MECHA. =
x2
33
Loader mecha. : "MGD-34" + Drive unit : "KSM-213CLCM"
25 18
x2
12
06
26
13
05
20
16 x2
18
x2 21
15 Z003
Z006 Z005 (Silver)
21
18 Z007
09 11
Z002
Drive unit : KSM-213CLCM
Refer to
08 Z003 "EXPLODED VIEWS OF MECHANISM-2"
x2
Z004 x 2 Z003
(Gold)
Z005 (Silver)
Z006 x 2
30 19 Z006
20
04
17 14
03 03
02
28
07
23
01
18
24
10 31
32 19 x2
22
DX-7555
EXPLODED VIEWS OF MECHANISM-2
CD DRIVE UNIT : KSM-213CLCM
54
53 55
OK
61
51
NG
52
58 56
57
PARTS LIST
REF. NO. PART NO. (SN) DESCRIPTION Q'TY
51 X-2625-877-1 Motor chassis ass'y 1
52 X2625-769-1 Motor gear ass'y 1
53 2626-908-01 Sled shaft 1
54 24810023 Gear (A) (S) 1
55 7621-255-15 P2 x 3, Screw 2
56 24840008 Leaf switch 1
57 1639-678-12 Motor PC board 1
58 1-564-722-11 Connector 6pin 1
61 8848-483-05 KSS-213C, Pickup 1
DX-7555
A B C D
SCHEMATIC DIAGRAMS-1 U01 : MAIN CIRCUIT PC BOARD NAAR-8645
Q9001
NOTE 78M05
VSW_CPU 3 1
THE COMPONENTS IDENTIFIED BY MARK ARE CRITICAL FOR SAFETY. O I
C9001
G
100/16
C1011
+
OP
2
REPLACE ONLY WITH PART NUMBER SPECIFIED.
5
GND_CPU
VOLTAGE (MEASURED WITH VOLTMETER) IS DC VOLTAGE. (NO INPUT SIGNAL)
L1001
ELECTROLYTIC CAPACITORS ( ) ARE IN uF/WV.
2.2u
ALL CAPACITORS ARE IN pF/50WV UNLESS OTHERWISE NOTED. 3
CDSVRST_1
EX) 030 3pF 330 33pF 331 330pF 333 0.033uF 2
5 1
ALL RESISTORS ARE IN OHMS 1/4WATTS UNLESS OTHERWISE NOTED. R1001 VDD_CPU
NM
1 THE THICK LINES ON PC BOARD ARE THE PRINTING SIDE OF THE PARTS.
EX) PRINTING SIDE
R1002
10K GND_CPU
R1007
CIRCUIT IS SUBJECT TO CHANGE FOR IMPROVEMENT.
10K
R1003 R1004
ATTENTION
C1016
C1014
R1006
NC
10K
10K
10K
CAUTION
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
C1015
R1008
10K
AFIN D'ASSURER UNE PROTECTION
C1013
GPIO7
GPIO6
GPIO5
GPIO4
GPIO3
GPIO2
GPIO1
GPIO0
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
VDDVOLTAGE
CDSVRST
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