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)

PARTS
LIST
SZ
Sz
es
oo
DX-6930
No
oe)
REF.NO.
PART
NO.
DESCRIPTION
REF.NO.
PART
NO.
DESCRIPTION
Al
27100227BY
Chassis
A6]
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
A71
28324140
Knob,power
<B>
AS
27141522Y
Bracket
HP
28324184
Knob,power
<S>
A6
27121568Y
Back
panel
A72
28324564Y
Knob,
level
<B>
A9
27300750
Bushing
28324565Y
Knob,
level
<S>
Al0
27190524
KGLS-14R,Holder
A8]
29360807
Label
DANGER
Al3
21273149Y
Joint,power
A82
29361218
Label
LASER
Al4
27270214B
Spacer
A85
29360687
Label
CLASS1
Al6
27255004
CS-1U,Clip
A86
200095
1
NSAS-8P903,Socket
A19
834426068
2.6TTS+6B(BC),Self-tapping
screw
Ag]
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
ce
260208
Binder
A24
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
28324570Y
Knob,play
<B>
T901
2300776Y
AX
NPT-1138P,Power
transformer
2832AST1A
Knob,play
<S>
Ul
1H190516-2A
NAAR-4416-2A,Main
circuit
pc
board
ass'y
A34
28324572Y
Knob
FF
<B>
U2
1H190517-2
NADIS-4417-2,Display
circuit
pc
board
ass'y
28324573
Y
Knob
FF
<S>
U3
1H190518-2
NAAF-4418-2,Headphone
amplifier
pe
board
ass'y
A35
28324576Y
Knob
REP
<B>
U4
1H190519-2
NAAF-4419-2,Headphone
terminal
pe
board
ass'y
28324577Y
Knob
REP
<S>
US
1H190520-2
NAPS-4420-2,Power
supply
circuit
pc
board
ass'y
A36
28324574Y
Knob
TEN
<B>
U6
1H190521-2
NAPS-4421-2,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>
A4l
28184469Y
Top
cover
A42
834430088
3TTS+8B(BC),Self-tapping
screw
A43
28140680
0.5
X8
X
180,Cushion
NOTE:
<B>:Black
model
only
A51
1H192701K
Front
panel
ass'y
<B>
<S>:Silver
model
only
1H193701K
Front
panel
ass'y
<S>
apa
ese
raacap
|:
NOTE:
THE
COMPONENTS
IDENTIFIED
BY
MARK
28125223AY
End
cap
R
Z\
ARE
CRITICAL
FOR
RISK
OF
FIRE
AND
A58
27211397Y
Tray
panel
<B>
ELECTRIC
SHOCK.
REPLACE
ONLY
WITH
27211398
Tray
panel
<S>
PART
NUMBER
SPECIFIED.
A60 28191623AY Clear plate

MECHANISM-EXPLODED VIEW
PICKUP DRIVE UNIT-EXPLOVED VIEW
PARTS LIST
Sled shaft
Turntable chassis
Motor gear
Motor pc board
Leafswitch
NSCT-4P223,Connector
2P+3F(BC) Pan head screw
2X5 ,Self-tapping screw
Plate
ee
PARTS LIST
REF.NO. |PART NO. DESCRIPTION
Tray
Damper
PART NO. DESCRIPTION
26
—
Front tape
3TTB+10B(BC),Self-tapping screw
Chucking pulley
Chucking chassis
2.6TTS+6C,Self-tapping screw
Yoke damper
2TTP+4S, Tapping screw
Middle gear
Tray holder
27301227
27301230
©0 CO YN DWN FP WwW LN
Magnet 2.6TTB+3C(BC),Self-tapping screw
Tray holder,front
Main chassis
Boss,back
2TTS+4C,Self-tapping screw
—_
oO
Chucking yoke
Gear cover
Screw with washer
KSM-2101AAM,Pickup drive unit
— —)
27301224
24506890
834120049
_~ No
—
Ww
_
BN
— Ww
od
n
ry ~
—
‘oOo oo
iw
Oo
21 Hinge holder
22 Hinge
23 838426108 2.6TTB+10B(BC),Self-tapping screw
24 8761301008 {W3X 10F,Washer
N
WN
24506882 Drive gear Motor ass’
REMOVEMENT OF DISC TRAY
Screw for stopper
Screw for stopper
1.Loosen
the
screw
for
stopper
until
the
head
of
screw
and
the
tray
are
the
same
height.
2.Turn POWER switch to on.
3.Prees
OPEN/CLOSE
button
to
open
the
tray.
4.Turn POWER switch to off.
5.Remove the tray.
248

DX-6920 :
DX-6920
ADJUSTMENT
PROCEDURES
Instruments required
Dual
trace
oscilloscope,
Frequency
counter,
AF
oscillator,
Test
disc
(SONY
YEDS-18),
AC
voltmeter,
Jitter
meter,
and Socket P4(Part no. 25050138)
1. Focus offset adjustment
Load the test disc YEDS-18 on the tray and play the track 2.
Connect the oscilloscope or jitter meter to terminal P106.
(Oscilloscope)
Adjust R109 until a clear trace of waveform pattern as
shown photo | appear on the oscilloscope.
When the amount of jitter is broad, set R109 to mechanical
center.
(Jitter meter)
Adjust R109 until the jitter meter reading becomes
minimum.(Less than 10ns.)
After adjustment, disconnect the oscilloscope or jittter
meter.
HF + Oscilloscope range
Vertical : O.S5V/div.
Holizontal : 0.5 ps/div.
DC, Ground: Center
Oscilloscope
LRT
YAR
foe &@ 6 @
- 2 e «
Photo 1
2. Tracking offset adjustment
Load the test disc YEDS-18 on the tray and play the track 2.
Turn
R116
to
minimum
position.(Counter
clockwise)
Connect the oscilloscope between pin 3 (TR) of P107 and
pin 2 (GND) of P106.
Adjust
R106
until
the
center
of
tracking
error
signal
on
the
oscilloscope
becomes
GND
level.
Turn R116 to the mechanical center.
After adjustment, disconnect the oscilloscope.
P107
GND level TR Oscilloscope
A=8
P106
Vertical
—
:
500
mV/div.
Holizental : 1 ms/div.
Photo
2
GND
DC,
Ground:
Center
246s
SOO

3. Focus gain adjustment
Set the output of AF oscillator to 1KHz, 1~1.5Vp-p.
Play the track 2 of test disc.
Connect the oscilloscope and the AF oscillator as shown
below.
AF
oscillator
GND
. a a
ane ae © 7
oe ae oe
i I i A A .
4 i MAAK | K Af A ‘
\
‘ yf @ ; pi
Photo 3
Adjust R117 until 1kHz components of channels 1] and
2 on oscilloscope become same level.
After adjustment, disconnect the AF oscillator and the
oscilloscope.
4. Tracking gain adjustment
Set the output of AF oscillator to 1.2kHz, 1~1.5Vp-p.
Play the track 2 of test disc.
Connect the oscilloscope and the AF oscillator as shown
below.
AF
oscillator
Photo 4
Adjust R116 until 1.2kHz components of channels 1 and
2 on oscilloscope become same level.
After adjustment, disconnect the AF oscillator and the
oscilloscope.
After adjustment, confirm that the center of tracking error
signal becomes GND level.
eo em
Oscilloscope
CH 1 CH 2
GND
Vertical : 0.2V/div.
Holizontal: 0.2 ms/div.
Oscilloscope
CH1 CH2
Vertical : 0.2V/div.
Holizontal: 0.2 ms/div.
PIO6
ele
eioy 1Sires
2 4 TE!
RI06 TE2
TR OFFSET R
109
RIIG FOCUS OF FSET
TR GAIN RU?
FOCUS GAIN
a ea
DX-6930
DX-6920

HEADPHONE AMPLIFIER PC BOARD
DX-6920
° 0 o
bas >< a)
a iye .
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PRINTED
CIRCUIT
BOARD
VIEW
FROM
BOTTOM
SIDE
*
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[oii Soe
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c430 Hl21+18V
HEADPHONE TERMINAL PC BOARD
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bass
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C3t4
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MAIN CIRCUIT PC BOARD
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HEADPHONE AMPLIFIER PC BOARD
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HEADPHONE TERMINAL PC BOARD

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SCHEMATIC DIAGRAM
MODEL DX-6930
|
Al
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
Q701
6—8T—1 25GK
4 B48 6 TY 8 B10 1 1213 141%
QP USOXS
37190 $705
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NAAR—441 6-2
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Bot eS Ge ed
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COMPONENTS JOENTIFIEDsY MARK AN ARE CRITICAL ‘POR SAFETY. |
REPLACE ONLY WITH PART NUMBER SPECIFIED t
@ VOLTAGE (MEASURED WITH VOLTMETER)G IS DC VOLTAGE INO INEY INPUT SIGNAL) |
i
1
@ ALL PNP TRANSISTORS ARE BQUIVALENT TO 2SA1015-QR
OTHERWISE NOTED.
© ALL NPN TRANSISTORS ARE EQUIVALENT TO 2301815-GR UNLESS
OTHERWISE NOTED.
e ALL DIODES ARE EQUIVALENT To 1$5153 UNLESS OTHERWISE NOTED.
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@ AL CAP ARE IN oF. RWISE NOTED
EXBpF--050. S3po530, S3OpA-5351. 0 OSS phoS35 pel n
© ALL IN SS OTHERWISE i
© THE THICK LINES IN PC BOARD ARE THE PRINTING SIDE OF THE THE PARTS.
PRINTING $108 ees 9-2
ec! 1S SUBJECT TO CHANGE FOR IMPROVEMENT.
ONKYO CORPORATION

SCHEMATIC DIAGRAM
MODEL DX-6920
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PRINTED CIRCUIT BOARD-PARTS LIST
MAIN CIRCUIT PC BOARD(NAAR-4416-1 A724)
CIRCUIT NO.
Q101
Q104
Q106
Q108
Q109
Q110
Qlil
Q112
Q120
Q301
Q302
Q303
Q401-Q404
Q901
Q902
Q963
Q904
Q906
Q102,Q995
Q)103
Q105
Q113,Q115
Q114
Q116,Q117
Q405,0-406
Q407,0408
Q119
QF101,QF102
D101-D1i04
D108,D109
D105
D110
D901-D904
D905-D908
D909
D912-D915
D910
D911
X30}
L160}
PART NO.
ICs
22240404
22240366
22240034
22240487
22240585
22246198
222741645
22240018
22246322
VPM bk
2224032)
22240520
22240201
222780055MIT
222790053
2227801 55MIT
227901 S55MIT
222780053
Transistors
2211503 or
2211504
221281
22240168
221281
2211455
2213090
2212524
2211705 or
2211706
Opto.module
24120031
IC protectors
252112
Diodes
223163 or
223205
224450562
223191
22380032
22380045
223163 or
223205
224452202
224450512
Xtal
3010159
Coil
233411K100
DESCRIPTION
CXAI1571S
CXA1372S
LA6510
CXD2500AQ
CXP50116-369Q
LC3664NL-12
745HC164
M51943ASL
LB1639
74HCO4P
YM3433
SM5861AP
NJM4565D-B
MSF78MO0SL
79L05
MSF78M15L
MSF79M15L
78L.05
OO
©
2SA950-0 or
2SA950-Y
DTC114¥YS
STA341M-L
DTC114YS
2SA1015-GR
DTA114YS
2SK363-GR
28D655-E or
2SD655-F
TOTX178, Transmitter
A ICP-N15
1SS133 or
1SS270A
MTZ5.6B
© sp101
1SR139-100
RL203
1$$133 or
1SS270A
MTZ22B
MTZ5.1B
AT-38-169
NCH-1383
= 99s
CIRCUIT NO.
C101,C105
C103,C137
C106
C109,C120
C110
Clil
C112,C141
C113,Ci24
C114-Ci16
C118,C144
Ci19.C122
Ci5,Ci30
C127
C128,C152
C129
C131,C136
C132
C133,C156
C134
CIs5,C139
C138,C155
C140
C143
Ci45
C146
C147,C151
C148,C149
C153
C154
C163
C165
C167
C169
C170
C175
C304,C306
C308
C310
C311,C312
C313,C314
C401,C402
C403-C406
C407,C408
C413,C414
C415,C416
C417,C4i8
C419,C420
C421,C422
C423,C424
PART NO.
Capacitors
354721019
374724724
354721019
354742219
374722234
374721044
374724734
374721034
374721044
354780479
374721044
354742219
354780109
354744709
374724744
374721034
354784799
354764709
374723334
354721019
374722224
374721524
354721019
354721029
354784799
374721034
354721019
374721044
354744709
354721019
354742219
354762209
354721019
3000058
374722224
354721019
354742219
354721019
374722244
354721019
373301014
373302714
374722224
374722224
372122024
354742219
374723334
374722224
373302714
DESCRIPTION
100 » F,6.3¥,Elect.
4700pF + 5%,50V Plastic
100 »x F,6.3V Elect.
220 yz F,16V,Elect.
0.022 « F45%,50V,Plastic
0.1 « F£5%,50V,Plastic
0.047 « F+5%,50V,Plasuc
0.0) « F+5%,50V Plastic
0.1 ¢ F£5%,50V Plastic
4.7 2 F,SOV Elect
0.1 2 F£5$%,50V,Plastic
220 uw F,16V Elect.
1 « F,50V,Elect.
47 » F,16V,Elect.
0.47 p F*5%,S50V,Plasnc
0.01 4 F=5%,50V,Plastic
0.47 » F,50V,Elect.
47 u F,35V. Elect.
0.033 « F=5%,50V,Plastic
100 pz: F,6.3V Elect.
2200pF + 5% ,50V Plastic
1500pF + 5%,50V Plastic
100 « F,6.3V Elect.
1000 pz F.6.3V, Elect.
0.47 gz F,SOV Elect.
0.01 « F+5%,50V,Plastic
100 2 F.6.3V,Elect.
0.1 ¢ F25%.50V,Plastic
47 » F,16V Elect.
100 x F,6.3V Elect.
220 px F.16V,Elect.
22 uw F,35V,Elect.
100 »: F,6.3V Elect.
1 w F,5.5V,Super
2200pF + 5%,50V Plastic
100 p: F.6.3V,Elect.
220 gs F,16V,Elect.
100 » F,6.3V, Elect,
0.22 « Ft 5%,50V Plastic
100 » F,6.3V Elect.
1O0pF -£ $%,125V,PP
270pF + 5%,125V,PP
2200pF + 5%,50V Plastic
2200pF = 5%,50V Plastic
2000pF + 5%,50V, Styrole
220 » F,16V,Elect.
0.033 « F+5%,50V, Plastic
2200pF + 5% ,50V Plastic
270pF = 5%.125V,PP
CIRCUIT NO.
C425-C432
C433,C434
C435,C436
C903 C904
C905,C906
C907,C918
C908
C909,C910
C911,C912
C913,C914
C915
C917
C919
C920
Cozi cez2
C924
R106
R109
R116,R117
R145
R146
P101
P102
P103
P104
P106
Pi07
P9O1
P05
P30]
PART NO.
Capacitors
384742219
374723334
374722734
393163327
354742229
354764709
354780229
354744719
354742219
375624744
354721029
354762219
354764719
354764709
374722244
374724744
Resistors
5210066
5210060
5210066
49163472407
49163472407
Plugs
25055152
25055153
25055148
25055149
25055038
25055045
25055138
Jack
25045330
Terminal
25045353
25045351
Holder
27190751
DESCRIPTION
220 u F,16V,Elect.
0.033 » F£5%,S0V,Plastic
0.027 p F45%,50V Plastic
3300 « F,35V,Elect.
2200 py F,16V Elect.
47 » F,35V Elect.
2.2 « F,50V,Elect
470 x F,16V,Elect.
220 » F,16V,Elect.
0.47 »p F£5%,50V Plastic
1000 4 F,6.3V, Elect.
220 » F,35V,Elect.
470 2: F,35V, Elect.
47 » F,35V,Elect.
0.22 « F25%,50V Plasuc
0.47 »p F+5S%,50V Plastic
NO6HR22K BD,Semi-fixed
NO6GHR2.2KBD Semi-fixed
NO6HR22KBD,Semi-fixed
© RM1/101) 4.7K X7,Array
RM1/1013 4.7K X7,Array
NPLG-8P136
NPLG-9P 137
NPLG-4P132
NPLG-5P133
NPLG-2P29
NPLG-4P33
NPLG-8P122
NPJ-2PDBL184
@ NPJ-2PDBL199,Output
© NPJ-4PDWR197,Output
DISPLAY CIRCUIT PC BOARD(NADIS-4417-1/2)
CIRCUIT NO.
U701
$701-S712
$713-S$715
$716-S719
$720,S731
$721-S730
Q701
C70]
PART NO.
24130003
25035548
25035548
25035548
25035548
25035548
212109
353721019
2719074 Y
DESCRIPTION
GP1U50XS,Remote contol sensor
NPS-111-S510,.Push switches
© NPS-111-S510,Push switches
NPS-111-S510,Push switches
© NPS-111-S510,Push switches
NPS-131-$510,Push switches
8-BT-125GK,FL tube
100 » F,6.3V Elect. capacitor
Holder FL
280) 2
1D) Ge} Ki 0)
DX-6920
HEADPHONE AMPLIFIER PC BOARD(NAAF-4418-1/2)
CIRCUITNO. PARTNO. DESCRIPTION
Q501 222654 NJM45S6D1C
501.0302 354744709 47 « F,16V,Elect. capacitor
R501 51420054 @ NI6RGM20KB30F,
Variable resistor
5104242 © N16RGM20KB30F,
Variable resistor
HEADPHONE TERMINAL PC BOARD(NAAF-441 9-1/2)
CIRCUITNO. PART NO. DESCRIPTION
P55) 25045139 HSJ-0540-01-010,
Headphone jack
POWER SUPPLY CIRCUIT PC BOARD(NAPS-4420- 1/2)
CIRCUITNO. PARTNO. DESCRIPTION
C951 3500065A A\ DE7150FZ103PAC400V/
125V IS capacitor
S95} 25035558 A\ NPS-111-S520P,
Power switch
TERMINAL PC BOARD(NAPS-4421-1/2)
CIRCUITNO. PART NO. DESCRIPTION
2001191615 NSAS-16P0295 Socket
NOTE: @:DX-6920 only
S:DX-6930 only
NOTE: THE COMPONENTS IDENTIFIED BY MARK
Z\ARE CRITICAL FOR RISK OF FIRE AND
ELECTRIC SHOCK. REPLACE ONLY WITH
PART NUMBER SPECIFIED.

DX-6930 # DX-6930
DX-6920 # Dx-6920
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