Onkyo DX-6930 User manual

~ DX-6930
ae) G1: 20)
REF.NO. 3422
ONKYO. SERVICE MANUAL
COMPACT DISC PLAYER
MODEL DX-6930
MODEL DX-6920
Black and Silver models
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
MEA-
SUREMENTS
TO
DETERMINE
THAT
EXPOSED
PARTS
ARE
ACCEPTABLY
INSULATED
FROM
THE
SUPPLY
CIRCUIT
BEFORE
RETURNING
THE
APPLIANCE
TO
THE
CUSTOMER.
AUDIO COMPONENTS
ca ne 2 eR NR eta a
SPECIFICATIONS
Signal readout system: Optical non-contact
Reading rotation: About 500~200 r.p.m.
(constant linear velocity)
_ Linear velocity: 1.2~1.4m/s
Error
correction
system:
Cross
interleave
readsolomon
code
D/A
converter:
1
bit
PWM/Accu
Pulse
D/A
convertor
Sampling
frequency:
352.8kHz
(8
times
oversampling)
Number of channels: 2 (Stereo)
Frequency response: SHz~20kHz
Total harmonic distortion: 0.004% (at 1kHz)
Dynamic range: 96dB
Signal to noise ratio: 100dB
Channel separation: 90dB (at 1kHz)
Wow
and
Flutter:
Below
threshold
of
measurability
Power consumption: 12 watts
Output level: 2 volts r.m.s.
Dimensions
(WXHXD):
455x110x306mm
18”
4-3/8"x12”
Weight:
5.0kg.
11.0
Ibs.
Specifications
are
subject
to
change
without
notice.

DX-6930
DX-6920
TABLE OF CONTENTS
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Printed circuit board view
Main circui/Headphone pcb..........cccccecceccececeeeecececuseacecuees 23
Display/Power supply/Terminal pCD...........ccceceeceeesecanceseeees 35
Schematic diagram DX-6930.............ccccccsccececcececsecneececucusees 25
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Printed Circuit Doard-parts list...........cceccssscssssssessessseeeeeceeceees 29
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NOTE ON COMPACT DISC
@ Holding Compact Discs
Hold Compact Discs by the edges so that you do not touch
the surface of disc. Remember that the side of the disc with
the “rainbow” reflection is the side containing the audio
information.
Do not attach tape or paper to the label side of the disc
and always be careful not to leave fingerprints on the side
‘that is played.
@ Storing Compact Discs
Store Compact Discs in a location protected from direct
sunlight, high heat and humidity and extremely high
and low temperatures. Discs should never be left in the
trunk or interior of an automobile in the sun since the
temperature can become very high in such a closed environ-
ment.
Always store Compact Discs in the holders in which they
were sold. Never leave a disc in the player’s disc holder for
a long period of time.
Not this way
SERVICE PROCEDURES
1. Safety-check out
After correcting the original service problem,perform
the following safety check before releasing the set
to the customer:
Connect the insulating-resistance tester between the
plug of power supply cord and chassis.
Specifications: More than 10Mohm at SOOV.
@ Cleaning Compact Discs
Before playing a disc wipe off the playing surface with a
soft cloth to remove dust and other soil. Wipe the surface
in straight lines from the center of the disc outward, not
in a circular motion as you would with a phonograph
record.
Do not use benzene, chemical cleansers or phonograph
record cleaning solutions to clean Compact Discs. Also
avoid static electricity prevention solutions since they can
damage the surface of Compact Discs.
Problems Caused by Dew
Dew can form inside a Compact player when it is brought
from a cold environment into a warm room, when a room
is rapidly heated and if a player is left in a humid environ-
ment.
This dew can prevent the laser pickup from reading the
data contained in the pits in the disc surface. If the player
does not operate properly because of dew, remove the disc
and leave the player’s power switch on for about one
hour to remove all moisture.
DX-6930 |
DX-6920 |
CAUTION ON REPLACEMENT OF OPTICAL PICKUP
The laser diode in the optical pickup block is so During repair,carefulley take the following precautions.
sensitive to static electricity,surge current andetc, (The following precautions are included in the service
that the components are liable to be broken down parts.)
or its reliability remarkably deteriorated.
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 inpedance lower than 10M) on the work-
desk and place the set on the conductive sheet so
that the chassis.
other end is grounded.
Be particularly careful when the workers wear
synthetic fiber clothes, or air is dry.
4.Select a soldering iron that permits no leakage and
Test equipments and toolings should be grounded have the tip of the iron well-grounded.
in order that their ground level is the same the 5.Do not check the laser diode terminals with the
ground of the power source. probe of a circuit tester or oscilloscope.
2.Grounding for the test equipment and tools.
Care Should be taken with the optical pickup.
The optical pickup is sensitive to static electricity surge currents,and other
high electrical noise, and because there is the possibility of damage to
performance, in the handling of the pickup, the utmost care must be
taken, particularly with regard to static electricity.
1. When checking the laser terminal, avoid making connections using the
probes of a tester or oscilloscope, or an ordinary power supply.
2. When replacing the optical pickup, first short the LD terminals and
remove the connector. Also, when attaching the new optical pickup,
after attaching the connector, unsolder the LD terminals.
Terminal
LD
Optical pickup

DX-6930
DX-6930 :
DX-6920
DX-6920
PROTECTION
OF
EYES
FROM
LASER
BEAM
DURING
SERVICING
IC
BLOCK
DIAGRAM
AND
DESCRIPTIONS
This
set
employs
a
laser.
Therefore,
be
sure
to
follow
Laser
Diode Properties
carefully
the
instructions
below
when
servicing.
@
Material:
GaAS/GaAlAs
|
CXA1571S
(RF
Amp)
@
Wavelength:
780nm
WARNING
@
Emission
Duration:
continuous
WHEN
SERVICING,
DO
NOT
APPROACH
THE
LASER
@
Laser
output:
max.
0.5mW*
EXIT
WITH
THE
EYE
TOO
CLOSELY.
IN
CASE
IT
IS
*This
output
is
the
value
measured
at
a
distance
NECESSARY
TO
CONFIRM
LASER
BEAM
EMMISION,
about
1.8mm
from
the
objective
lens
surface
BE
SURE
TO
OBSERVE
FROM
A
DISTANCE
OF
MORE
©
on
the
Optical
Pick-up
Block.
THAN 30cm FROM THE SURFACE OF THE OBJECTIVE
LENS ON THE OPTICAL PICK-UP BLOCK.
LASER WARNING LABELS
The label shown below are affixed.
1. Warning labels 2. Class 1 label
These labels are located on the arm of mechanism This label is located on the back panel.
and the back panel.
A.
~ DANGER —iwvisigte Laser RADIATION LUOKAN 1
WHEN OPEN AND INTERLOCK FAILED OR o LASERLAITE
DEFEATED. AVOID DIRECT EXPOSURE 10 BEAM CLASS 1 LASER
CAUTION —sazaroous Laser ANO PRODUCT” KLASS 1
ELECTROMAGNETIC RADIATION WHEN OPEN
ANO INTERLOCK OEFEATED
ENTION —ravonnemenr LASER
ET ELECTROMAGNETIQUE DANGEREUX SI
QUVERT AVEC L'ECLENCHEMENT DE SECURITE
LASER APPARAT
Output terminal of APC amplifier.
Input terminal of APC amplifier.
Inversion input terminal for RF I-V amplifier. Connect to photo diode A+C.
_— 'U mt 1M
8 |5 |S fg
g
Inversion input terminal for RF I-V amplifier. Connect to photo diode B+D.
I {Inversion input terminal for F I-V amplifier. Connect to photo diode F.
ti
Z |Z
Inversion input terminal for E I-V amplifier. Connect to photo diode E.
DC voltage output of (Vcc+V EE )/2.
Middle point voltage input terminal. _-
g put_from this terminal.
< a)
A
fon dS a ele edd
Oo
<
(e.
m
i
— j
2
:
=o Jo} Jol. fo
:
a
Bla lp lols str fa foo fo [5
9
e 9)
‘
RF amplifier output terminal
Inversion input terminal of RF amplifier
Change-over terminal for APC amplifier.
F i
AS
20 _ |LD-ON

DX-6930
DX-6920
CXA1372S ( Servo Signal Processor )
x n
m 4
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43002
4300330 sS3ucdaV
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LdIHS LNANI
NOLIVSN Id WOOD
SV ONINOVEL
PIN. NO.
i0
FSET ie
search, tracking jump. and sled kick height is decided.
SSTOP| I | Inner switch selection input terminal.
DIRC
LOCK
DESCRIPTION
Peak setting input of phase correction of focus track-
Capacitor connection terminal for time constant when
defect.
ing.
This terminal is flowed the current so that the focus
Window comparator input terminal for ATSC detec-
This terminal is used when a track jump.
Focus error input terminal. 27
The sled runaway prevention circuit operates at the
Capacitor connection terminal for time constant when low level.
detect. 8 i
Mid-point voltage input terminal. 29 | XLT ea
Connect the capacitor between pin 9 and this pin when DATA Ee
the high frequency gain of focus servo is dropped. 3} XRST ea Reset input terminal. Active low.
Latch input from microprocessor.
Serial data input from microprocessor.
minal.
Input terminal for the low frequency boost of focus
Focus drive output terminal.
Inversion input terminal of focus amplifier.
Time constant termina! to make the focus search wave-
form.
| 19 | SL+ No-inversion input terminal of sled amplifier.
SLO Sled (slide) drive output terminal.
| 21 }st- |r| Inversion input terminal of sled amplifier.
Inversion input terminal of tracking amplifier.
DX-6930
DX-6920
YM3433(18 bits/8 times Oversampling Digital Filter)
gM
(MORE THAN 400xFs)
wco, SHL
ri) SHL
a ms SHR GENERATION
15] 16/18
TIMING CIRCUIT BCO i
MICRO PROGRAM| |GENERATION Baa
ACCUMULATOR
vss > ras
| SHIFTER SPY ee
ce] laew
ae
ee ! S2| (585
| oO ofa
| ORO
|
SOI | TEMPORARY
| RAM | |
LL SST = ee ee el
:
XO
XI
VDD2
signal system.
2
3
4
5
Bit
clock
input
terminal
of
input
data.
6
7
10
ST=L(] DAC):L channel deglitch signal output.
ST=H(2 DACs):L and R channels deglitch signal output.
(Not used.)
Connect
the
crystal
oscillator
for
the
system
clock
to
these
terminals.
Power supply terminal for crystal oscillator and deglitch
SDSY
Clock
input
terminal
to
show
the
input
timing
and
L/R
channels partitioned of input data.
Data input terminal.
i
een
VDD]
Power
supply
terminal.(Connect
to
5V.)
a
ST=L(C1
DAC):L
and
R
channels
data
output
terminal.
ST=H(2 DAC):L channel data output terminal.
ll
Word
clock
output
terminal
for
output
data
DLO/DRO.
12
Bit
clock
output
terminal
for
output
data
DLO/DRO.
13 VSS Ground terminal.
14
SE
|
DAC/2
DAC
selection
terminal.(]
DAC
at
low
level
and
2
DAC
at
high
level.)
R channel! data output terminal.
15
16/18
Bit
number
selection
terminal.(16
bits
at
low
level
and
16 SHR
18 bits at high level.)
|
DAC(ST=L):R
channel
deglitch
signal
output.(Not
used.)

DX-6930
DX-6920
CXD2500AQ
(Digital
Signal
Processor)
=
a PLL
ARI-PITCH
DOUBLE SPEED)
SYNC.
PROTECTOR
NOISE 16@-TIMES
OVERSAMPLING
FILTER
LB1639 (Volume Motor Drive)
Veutl Veut?
REGISTER
J
id
1 O
qw
en
zy
NO
3 &
za
x
rit
74HC164(8-bits
Serial/Paralle!
Output
Shift
Register)
SERIAL A Voc
INPUTS OH
QA QG
QF OUTPUTS
OUTPUTS
QE
QD CLEAR
GND CLOCK
eh,

SYMBOL } VO | DESCRIPTION
I | Focus OK input
0 | Output filter changeover output of spindle motor DAO7
Spindle motor control output DAQ6
| O | Spindle motor servo control
O | Spindle motor servo control
iH when GFS is high
Oscillation circuit input for analog EFM PLL
(8. 6436MHz)
Test terminal
Charge pump output for analog EFM PLL
Ground terminal
PLL charge pump output for variable pitch
‘Clock input for variable pitch from VCO
(16. 934MHz)
‘Filter output for master PLL
Filter input for master PLI.
Charge pump output for master PI.I.
“| Analog ground
VCO control voltage input for master } pour
EMPH
EFM signal input WEFCK
Connect to the ground.
Connect to the ground.
EFM full swing output
Connect to the ground.
Audio data output mode changeover input.
Serial data at L. and paraller data at H.
D/A interface for 48 bits slot. Word clock {=2Fs.
D/A interface for 48 bits slot. 1.R clock {=Fs.
= Power supply terminal (+5V)
| | Data output terminals
Bit clock of 48 bits slot
Serial data of 64 bits slot
Bit clock of 68 bits slot
MIRR-
Note:SSP:Q104 CXA1372S
LA6510 (Power OP Amp)
Ground
| 16. SA TIME 2. H when 334. 8088MIiiz.
DESCRIPTION
RFCK output
“C2PO0 output
XRAOF output
MNT3 output
“MNT2 output
“MNTI output
3 MNTO output
Control output for aperture correction. H when Kch.
Contrul output fur aperture correction. Hl when Ich.
Crystal oscillation circuit input of 16. Q344MH2 or
$3. SOXYMHz input
Crystal oscillation circuit output of 16. 93441 MHz
Crystal selection input terminal. 1. when
2/3 divided output of pins 53 & 54
4. 2336MHz output
16. OS f4MEz output
Digital output control input. On at H & Off at L..
Digital output
Emphasis control output. Active H.
‘Write frame clock output o
Sub-cude deieciion sulput. H when is detected SO GE,
Sl.
‘Serial output of sub code(P~ W)
Clock input for read ‘out SBSO
Sub Q 80 bits. PCM peak. and level data 16 bits
output
Clock input for read out SQSO
Muting control output. Active HH.
Sens output. Output to microprocessor
System reset. Rest at low level.
Serial data input from microprocessor
Latch input from microprocessor. {atch the serial
data at trailing.
Power supply
Serial data transfer clock input from microprocessor
Sens input from SSP
Track jump numbers count signal input
Serial data output to SSP
Serial data latch output to SSP. Latch at trailing.
Mirror signal input
DX-6930
DX-6920
SM5861AP (D/A converter)
INFINITE INPUT TIMING
ZERO CONTROL
DETECTOR SECTION WwCKIl
OPERATION
TIMING
CONTROL (4) TSTN
INPUT
MUT
INTERFACE ) EE
INTERNAL
LINEAR SYSTEM CLOCK
INTERPOL ATION (26) CKO
SYSTEM
CLOCK
XDIVN
XVOD
22xvss
POWER
SUPPLY FOR PWM DATA GENERATION
DIGITAL
POWER
POWER
SUPPLY
SUPPLY FOR
ANALOG FOR ANALOG
RON
Mode select of PWM output
| 4 (TSTN|Testtermindl = CES [RO [Datacoutput,
| 6 |MUTER
)
WCKI Input data word clock RON
17
NC
INC
XVDD 5V supply for clock section
ae
| 8 |DVDD___|5V power supply for digital section | 22 [XVSS___[Ground for clock section
| 9 |RSTN |Resetinput_ | 23 XTI [Crystal oscillator input
| 10 |AVDD1__[5¥V supply for analogue section | 24 |XTO____[ Crystal oscillator ouput
etl tas
System clock select
Ground for analogue section Clock output
Serial data input for left channel
SV supp!
for analogue section erial data input for right channel
Oe

DX-6930 $¢ DX-6930
DX-6920 4 DX-6920
CXP50112 -369@ (Microprocessor)
oO
escription
usic file address signal.
uorescent indicator tube segment drive output terminals.
uorescent indicator tube grid drive output terminals.
nchronizing signal detection input terminal of sub code frame.
Pin No. {Symbol
~A3
=
nr fe
LQ}?
SS) 1S
> 1A
QUO. QH2 t
MEMORY IC
=
(
&
ge feo fe
e
\O
Reset input terminal.Reset at the low level.
Go
bo
D input terminal.Connect to the operation key.
hip enable terminal.
ON
=
m6 (<[S1<1G lal? [3
S ~ QO}? fe
; | ® loo
> Q
Ff
Z ws)
Q
,
a
TA erial data output terminal.
SO ubcode Q input terminal.
CK ubocde Q read clock input/output terminal.
erial data transmission clock output terminal.
ommand execution output terminal.
uting ON/OFF control output terminal.ON at the high level.
ray open control output terminal.Open at the low level.
ray close control output terminal.Close at the low level.
olume control output.
olume control output.
nterface of signal processor and microprocessor ICs.
cus OK input terminal.Focus OK at the high level.
ray close detection input terminal.
ay open detection input terminal.
igital output control output.
emote control signal (RI signal) output terminal.
emote control signal (RI signal) input terminal.
emote control signal input terminal.
usic file data signal.
round terminal.
lock output terminal.
5
6
BSN
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8-BT -1!25GK
aw
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tr [us
aS {ph ? Ww
W {ry B WwW
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O |O
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QO QO
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ree
FL TUBE
sfeleifalsle
XO {OO Jj) FON Jn |B [UO
ae 0
SI
=
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Oo
Es
mn Q
re
62
63~70
=
2)
ZL re)
u
S =
=D}
* OX-6930 ONLY
x
iF
>
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FILE
73
4
5
29
OP/CL
2,9
DISP
—~ X
DIIMMER
22
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=
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~
2)
=
=
Wr
if
oem sa
p
an cael
DOWN
egative power supply terminal for fluorescent indicator tube.
ptical pickup control output terminal.On at the low level.
usic file read/write control signal.
usic file shift signal. Control the serial data at the rise pulse.
usic file address signal.
M51943ASL (Rest IC)
ee
STOP
ie
USE
zs
PLAY
U
8 os
10
i
—~
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i
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4
=
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28
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22
EDIT
se
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PACKING VIEW
REF NO.
nn & WH YN
PART NO. DESCRIPTION
29110071 Damplon tape
29100037A 500%650mm,Styrene bag
29091434Y PadR
29091433Y PadL
282301 Sealing hook
29052372Y Master carton box <DX-6920BH>
29052373Y Master carton box <DX-6920S>
29052375Y Master carton box <DX-6930BH>
29052376Y Master carton box <DX-6930S>
Accessary bag ass'y
2010098A Connection cord
2010200 Remote control cord
24140196Y = RC-196C,Remote control transmitter <DX-6920>
24140221Y RC-221C,Remote control transmitter <DX-6930>
29341706Y Instruction manual
3010054 UM-3,Two batteries
29100097 350 X250,Styrene bag
29365020E § Warranty card
29100094A Styrene bag for warranty card
a Ce
DX-6930
DX-6920
Cord
Battery
(
NOTE: <BH>:Black model only
<S>:Silver model only

|
DX-6930
Syanr
CHASSIS-EXPLODED
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PARTS LIST
DX-6920
REF.NO.
PART
NO.
DESCRIPTION
REF.NO.
PART
NO.
DESCRIPTION
Al
27100227BY
Chassis
A61
27175254Y
Leg
A2
27141520Y
Bracket
F
A62
834430088
3TTS+8B(BC),Self-tapping
screw
A3
27141521Y
Bracket
R
A63
833430080
3TTP+8P(BC),Self-tapping
screw
A4
27130642Y
Bracket
C
A7)
28324140
Knob,power
<B>
AS
27141522Y
Bracket
HP
28324184
Knob,power
<S>
A6é
27121564Y
Back
panel
A72
28324564Y
Knob,level
<B>
A9
27300750
Bushing
28324565Y
Knob,level
<S>
Al0
27190524
KGLS-14R,Holder
A81
29360807
Label
DANGER
Al3
27273149Y
Joint,power
A82
29361218
Label
LASER
Al4
27270214B
Spacer
A85
29360687
Label
CLASS1
Al6
27255004
CS-1U,Clip
A86
2000951
NSAS-8P903,Socket
Al9
834426068
2.6TTS+6B(BC),Self-tapping
screw
A87
2000952
NSAS-8P904,Socket
A20
830440109
4TTC+10C(BC),Self-tapping
screw
A88
2002390810
NSAS-8P0120,Socket
A21
834430088
3TTS+8B(BC),Self-tapping
screw
A89
2002391020
NSAS-10P0119,Socket
A22
831130088
3TTW+8B,Self-tapping
screw
A97
2061112100
Cord
ass'y
A23
833430080
3TTP+8P(BC),Self-tapping
screw
A99
260208
Binder
A2A
87643010
W3
X
10F(BC),
Washer
L901
230910
A
ESD-R-25DB,Core
A31
27110689Y
Front
bracket
ass'y
<B>
P901
253164Y
or
A
AS-CEE250V2.5A,
27110690Y
Front
bracket
ass'y
<S>
253149
A
Power
supply
cord
A33
283245
70Y
Knob,play
<B>
T901
2300776Y
A
NPT-1138P,Power
transformer
28324571A
Knob,play
<S>
Ul
1H194516-1A
NAAR-4416-1A,Main
circuit
pe
board
ass'y
A34
28324578Y
Knob
FF
<B>
U2
1H194517-1
NADIS-4417-1,Display
circuit
pc
board
assy
28324579Y
Knob
FF
<S>
U3
1H194518-1
NAAF-4418-1,Headphone
amplifier
pc
board
ass'y
A35
28324580Y
Knob
REP
<B>
U4
1H194519-1
NAAF-4419-1,Headphone
terminal
pc
board
ass'y
28324581Y
Knob
REP
<S>
US
1H194520-1
NAPS-4420-1,Power
supply
circuit
pc
board
ass'y
A36
28324574
Y
Knob
TEN
<B>
U6
1H194521-1
NAPS-4421-1,Terminal
pc
board
ass'y
28324575A
Knob
TEN
<S>
Zi
24800001
Y
NCD-113S,CD
mechanism
ass'y
A37 27150344 Shield plate P <S>
A38 27150345 Shield plate <S>
A4] 28184469 Y Top cover
A42 834430088 3TTS+8B(BC),Self-tapping screw
A43
28
140680
0.5
X8
X
180,Cushion
NOTE:
<B>:Black
model
only
A51
1H196701K
Front
panel
ass'y
<B>
;
<S>:Silver model only
1H197701K Front panel ass'y <S>
28125222AY End cap L
28125223AY
End
cap
R
NOTE:
THE
COMPONENTS
IDENTIFIED
BY
MARK
AS8
27211397Y
Tray
panel
<B>
Z\ARE
CRITICAL
FOR
RISK
OF
FIRE
AND
27211398
Tray
poner
ess
ELECTRIC
SHOCK.
REPLACE
ONLY
WITH
ror
SIDI
TAY.
Gles
Biate
PART
NUMBER
SPECIFIED.
OO
x X
oo
Lo RCo)
NO G@
oko)