Onkyo DX-6930 User manual

DX-6930
DX-6920
REF.NO. 3422
ONKYO.
SERVICE
MANUAL
COMPACT DISC PLAYER
MODEL
DX-6930
MODEL
DX-6920
Black and Silver models
SAFETY-RELATED
COMPONENT
WARNING!!
SPECIFICATIONS
COMPONENTS
IDENTIFIED
BY
MARK
A
ON
THE
Signal
readout
system:
Optical
non-contact
SCHEMATIC
DIAGRAM
AND
IN
THE
PARTS
LIST
ARE
Reading
rotation:
About
500~200
r.p.m.
CRITICAL
FOR
RISK
OF
FIRE
AND
ELECTRIC
SHOCK.
(constant
linear
velocity)
REPLACE
THESE
COMPONENTS
WITH
ONKYO
PARTS
Linear
velocity:
1.2~1.4m/s
WHOSE
PART
NUMBERS
APPEAR
AS
SHOWN
IN
THIS
Error
correction
system:
Cross
interleave
readsolomon
code
MANUAL.
D/A
converter:
]
bit
PWM/Accu
Pulse
D/A
converter
Sampling
frequency:
352.8kHz
(8
times
oversampling)
MAKE
LEAKAGE-CURRENT
OR
RESISTANCE
MEA-
Number
of
channele
2
(Stereo)
SUREMENTS
TO
DETERMINE
THAT
EXPOSED
PARTS
Frequency
response:
SHz~20kHz
ARE
ACCEPTABLY
INSULATED
FROM
THE
SUPPLY
Total
harmonic
distortion:
0.004%
(at
1kHz)
CIRCUIT
BEFORE
RETURNING
THE
APPLIANCE
TO
Dynamic
range:
96dB
THE
CUSTOMER.
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):
455x110306mm
18”
4-3/8"
12”
Weight:
|
5.0kg.
11.0
Ibs.
Specifications
are
subject
to
change
without
notice.
ONKYO.
AUDIO
COMPONENTS
a rn tt cp

DX-6930
DX-6920
TABLE OF CONTENTS
SDE CILICAEO 1S ieee tenet takin xe ccsehenwidaann binds Gosencsbacemeastiacs 1
DETV.ICE PLO CEG UTES vel sissies acoued cessnaube hese acpacahetes ered ie 2
NOE ON COM Pact CISC ij ecssessnds oeeik ee iiasancesde ceosdsnommareelewiees 2
Caution on replacement of optical pickup... eeceeeeeeeseeeees 3
Protection of eyes from laser beam during servicing.............00 4
Deaser warning 1a Diels .:slcccuscocteicsdnch oiagavadehevornsasnaneawtenledendes 4
IC block diagrams and deSCriptiOnS...........ccccseccceeseeseceneceeseeees 5
PACKIN BV 10 Wisc. sess bechin saeco dacok vegsbuavaoswad sis teckebaseeputeancsase 13
Chassis exploded Vie Wiis avicostevansccad seseeavseedan tered npawwauacesnves 14
Paris St dO 269 20 cacti ca otcuuss ss taistrha Sc henseatartans atud actu os 15
DROSS voseiatiids ss coms oiideumantotinnterehitsteagsascsees 16
Mechanism exploded View .............c.ccccecucsecueccscececcsccceusceces 17
Mechanism-parts liSt...........cccecscescececsecesscsesscuceesauececesceeces 18
Removement of disc tray ..........ccceccececeececsccuscesescseceseuseuseees 18
AGJUStMENE PrOCeduUTES............ccecceesnevecsscasccsssscesssvecenccsoeees 20
Printed circuit board view
Main circuit/Headphone pcb ..........ccccceececcceccceeccescuscuesceuees 23
Display/Power supply/Terminal pcb...............cscccecsecueceescneees 35
Schematic diagram DX-6930.............cccscecesceccescecceceuececscues 25
OF 2 pes avec een asa nec Uaesaanarednies 27
Printed circuit board-parts liSt..........ccccccecccecssessesessesecceeeeeees 29
BIGCK Gia SPAMS sin. dsvcassuschanaven th vavucnenstesacdeshidueduuaeebareleeees 31
Trouble -shooung tide x cj scsss cams it Ses Gaveviderss cedddcanencceiees 33
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.
i)
Ye 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 SO0V.
@ 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.
CAUTION ON REPLACEMENT OF OPTICAL PICKUP
The laser diode in the optical pickup block is so
sensitive to static electricity,surge current and etc,
that the components are liable to be broken down
or its reliability remarkably deteriorated.
PRECAUTIONS
1.Ground for the work-desk.
Place a conductive sheet such as a sheet of copper
(with inpedance lower than 1OM1Q.) on the work-
desk and place the set on the conductive sheet so
that the chassis.
2.Grounding for the test equipment and tools.
Test equipments and toolings should be grounded
in order that their ground level is the same the
ground of the power source.
During repair,carefulley take the following precautions.
(The following precautions are included in the service
parts.)
3.Grounding for the human body.
Be sure to put on a wrist-strap for grounding whose
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
have the tip of the iron well-grounded.
5.Do not check the laser diode terminals with the
probe of a circuit tester or oscilloscope.
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 4
DX-6920 3

DX-6930
DX-6930
DX-6920
DX-6920
PROTECTION
OF
EYES
FROM
LASER
BEAM
DURING
SERVICING
Laser Diode Properties
IC BLOCK DIAGRAM AND DESCRIPTIONS
This set employs a laser. Therefore, be sure to follow
CXA1571S (RF Amp)
carefully the instructions below when servicing. @ Material: GaAS/GaAlAs
@ Wavelength: 780nm
WhENING: @ Emission Duration: continuous
WHEN SERVICING, DO NOT APPROACH THE LASER e@ Laser output: max. 0.S5mW*
EXIT WITH THE EYE TOO CLOSELY. IN CASE IT IS
NECESSARY TO CONFIRM LASER BEAM EMMISION,
BE SURE TO OBSERVE FROM A DISTANCE OF MORE
*This output is the value measured at a distance
about 1.8mm from the objective lens surface
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.
2. Class 1 label
This label is located on the back panel.
1. Warning labels
These labels are located on the arm of mechanism
and the back panel.
® |
“CLASS 1 LASER
LUOKAN 1
DANGER —ivisiece LASER RADIATION
R LASERLAITE
WHEN OPEN ANO INTERLOCK FAILED 0
DEFEATED. AVOID DIRECT EXPOSURE TO BEAM
AUTION —nazaroous LASER AND
ELECTROMAGNETIC RADIATION WHEN OPEN
ANO INTERLOCK DEFEATED
ENTION —ravonnement LASER
ET ELECTROMAGNETIQUE DANGEREUX
OUVERT AVEC L ECLENCHEMENT O€ SeeURITE
PRODUCT” KLASS 1
LASER APPARAT
n 3
g
Output terminal of APC amplifier.
Input terminal of APC amplifier.
Inversion input terminal for RF I-V amplifier. Connect to photo diode A+C.
as) =
Tr
me te S
ie le /Os |
ac) O
NO
—
Inversion input terminal for RF I-V amplifier. Connect to photo diode B+D.
7
Z
Inversion input terminal for F I-V amplifier. Connect to photo diode F.
Su
Z
Inversion input terminal for E I-V amplifier. Connect to photo diode E.
DC voltage output of (Vcc+V ze )/2.
| 1 (Middle point voltage input terminal.
Oo | Monitor output terminal for I-V amplifier E.
ee | Gain adjustment terminal for I-V amplifier E.
a
-
Tracking error amplifier output terminal. The signal E-F is output from this terminal.
‘BIAS
|
1
[Bias
adjustment
terminal
for
non-inversion
side
of
focus
error
amplifier,
[0
[Focus
erroramplifier
utputterming,
[©
|RFamplifier
outputtermin,
[I
[Inversion
input
terminal
of
RFamplifien
20_|LD-ON
|
1
|Change-overterminal
for
APC
amplifier.
cd fos
}
ac)
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°
Eb
\o
i

DX-6930 DX-6930
DX-6920
DX-6920
CXA1372S
(Servo
Signal
Processor
)
YM3433(18
bits/8
times
Oversampling
Digital
Filter)
4
a
@)
(MORE THAN 400xFs)
wco, SHL
>
4
wn
a
z
z
i=]
9°
z
oO
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16] SHR
= 15] 16718
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8
BCI
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DLO
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ACCUMULATOR
7
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SHIFTER
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”
DRO
|
SO! | TEMPORARY
| RAM
| 2 a EE ae ee ee J
A eS Pe ESRI SS NS NSE gf SSE, SESE ASI ARE GRO AS d
Function
ST=L(1 DAC):L channel deglitch signal output.
ST=H(2 DACs):L and R channels deglitch signal output.
(Not used.)
Connect the crysta! oscillator for the system clock to these
| -
|
Z
3
4 VDD2
signal system.
5
6
7
PIN. NO.} SYMBOL | I’0 |} DESCRIPTION
Peak setting input of phase correction of focus track-
FSET a
This terminal is flowed the current so that the focus
Capacitor connection terminal for time constant when
defect.
Window comparator input terminal for ATSC detec- search, tracking jump. and sled kick height is decided.
tion.
terminals.
Focus error input terminal.
Capacitor connection terminal for time constant when
detect.
The sled runaway prevention circuit operates at the Power supply terminal for crystal oscillator and deglitch
low level.
Mid-point voltage input terminal. Latch input from microprocessor.
29 |X
DATA ab Serial data input from microprocessor.
31 | xRST | 1 | ; ; ;
32 | C.OUT] 0 |
XO
XI
Po,
el
on
Bit
clock
input
terminal
of
input
data.
SDSY
Clock
input
terminal
to
show
the
input
timing
and
L/R
Ge
channels
partitioned
of
input
data.
Data input terminal.
Power supply terminal.(Connect to 5V.)
ee
ST=L(]
DAC):L
and
R
channels
data
output
terminal.
|
10)
[DRO
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
1
DAC/2
DAC
selection
terminal.(]
DAC
at
low
level
and
2
DAC
at
high
level.)
15
16/18
Bit
number
selection
terminal.(16
bits
at
low
level
and
Connect the capacitor between pin 9 and this pin when
the high frequency gain of focus servo is dropped.
Focus servo high frequency gain changeover input ter-
and SSTOP to according
command from microprocessor.
This terminal outputs FZC,
Input terminal for the low frequency boost of focus
35
Focus drive output terminal.
Inversion input terminal of focus amplifier.
Time constant terminal to make the focus search wave-
oe seid FOK
geover- input | 40 |cci [0] Defect bottom hold output terminal.
_ | a1 foc2 |) Defect bottom hold input terminal from CCI.
requenc | 43 {cB | 1 Defect bottom hold capacitor connection terminal.
44 rcp. |r | Mirror hold capacitor connection terminal.
_ 45 eer RF summing amplifier input terminal.
46 | RFO LO | RF summing amplifier output terminal.
| 48 | Tzc | 1) Tracking zero-cross comparator input terminal.
B/S
™ a7 =
a) ier) = ° 9 3
B-)
J — o °
3 ° c =
ao]
c - - : ="
=.
Inversion input terminal of tracking amplifier.
No-inversion input terminal of sled amplifier.
SLO Sled(slide) drive output terminal.
SL- LT | Inversion input terminal of sled amplifier.
18 bits at high level.)
|
DAC(ST=L):R
channel
deglitch
signal
output.(Not
used.
)

~ DX-6930
DX-6920
CXD2500AQ (Digital Signal Processor)
°
18)
a.
>
2
DIGITAL PLL EFM
ARI-PITCH DEMODUL ATOR
DOUBLE SPEED)
REGISTER
SYNC.
PROTECTOR
NOISE 18-TIMES
OVERSAMPLING
FILTER
LB1639
(Volume
Motor
Drive)
74HC164(8-bits
Serial/Parallel
Output
Shift
Register)
TRUTH
TABLE
Youll veut?
SERIAL A
INPUTS
OGNo
QA
OUTPUTS
OUTPUTS
Vial
QD CLEAR
GND CLOCK
Pin& NC
asic

DESCRIPTION
Focus OK input
) Output filter changeover output of spindle motor
) Hoss Spindle motor control output
Spindle motor servo control
Spindle motor servo control
iH when GFS is high
Oscillation circuit output for analog FEM PLL
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.L.
Reape?”
Analog ground
vco control voltage input for master
AVDD bee Analog section power supply (+5V)
fa EFM signal input
TEST 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 hits slot. I.R clock f{=Fs.
Power supply terminal (+5V)
Data output terminals
Serial data of 64 bits slot
; Bit clock of 68 bits slot
A 38 ’ y LR clock of 68 bits slot
ro [Dain
Note:SSP:Q104 CXA1372S
LA6510 (Power OP Amp)
DAO8
DA07
| DAOG
DA05
DAO4
DAV3
DA0Z2
CHM |
Digital output
DESCRIPTION
DAO’ _|_GFS output
‘DAO RFCK output
“C2PO0 output ons
~ XRAOF output
~ MNT3 output
$43. SGHYMHz input
Crystal oscillation circuit output of 16. 9344 MHz
Crystal selection input terminal. 1. when
16. 931UMHz. H when 33. 8688MHz.
2/3 divided output of pins 53 & 54
4.2436MEz output
16. 93 14Milz output
Digital output control input. On at HW & Off at L..
Emphasis contro! output. Active H.
Write frame clock output
Sub-code detection output. HH when is detected SO ur
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.
Seria! data input from microprocessor
Latch input from microprocessor. J.atch the serial
data at trailing.
Power supply
Serial data transfer clock input (rom 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.
Serial data transfer clock output to SSP
Mirror signal input
DX-6930
DX-6920
SM5861AP (D/A converter)
INFINITE INPUT TIMING
ZERO CONTROL
DETECTOR SECTION
OPERATION
TIMING
CONT ROL
INPUT
MUTEL
INTERFACE (5) E
INTERNAL
LINEAR SYSTEM CLOCK
INTERPOLATION rc 6) cKO
OPERATION
SYSTEM
CLOCK
XOIVN
XVO0O0
POWER
SUPPLY FOR PWM DATA GENERATION
DIGITAL
POWER
POWER
SUPPLY FOR palatal
ANALOG FOR ANALOG
BCKI Serial input data bit clock AVDD3 _[5V supply for analogue section
WCKI Input data word clock ee Data output
AVSS2 Ground for analogue section
RO —s*|Dataoutput
Ge Mec eet ee ee el
Crystal oscillator input
Crystal oscillator output
2
2
2 XDIVN System clock select
2
2
:
|
<
~”N
pale Q
round for analogue section | 26 |CKO [Clock output
| 13, |LON [Dataoutput SSCS SSDINE Serial data input for left channel
5V supply for analogue section | 28 {DINR erial data input for right channel
16
17
18
19
20
21
ZZ
3
4
5
6
Z
28
Cg)

DX-6930 3 DX-6930
DX-6920 ¢ DX-6920
CXP50112 -369Q@ (Microprocessor)
mbol
0~A3
~p
G~8G
nchronizing signal detection input terminal of sub code frame.
ee Te
ST
> ln
E
QO. QH2
MEMORY IC
bo
\O "A |—
S
w
Ca)
ud
W [uo Ju
Ww jr fe
aS
D6}AD input terminal.Connect to the operation ke
Chip enable terminal.
Serial data output terminal.
Subcode Q input terminal.
35~41 Q~
>
~” ow, a
itil
APS O|>
LOSE
- Volume control output.
n
O
‘@)
aw
8-BT -i25GK
~~ |Q
tC
il
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ar)
tr
;
2
2)
CO INI ION Jn [Te J UO — 1S) IO [OO |~ TON In [Oo Tho
ral Pe el =<
O lta hg [5g
a tri
FL TUBE
©
on
4
”
W ray open detection input terminal
igital output control output
df
F inal.
T i inal.
D
R
Remote control signal (RI signal) input terminal
Remote control signal input terminal.
63 ~70 ~D7 Music file data signal.
8
ON
N
wv =
Q
Zz
4\2\5
li
™10
re
BZ |C
f
06-6850.
on
en
PORT
ae
eee
XTAL
ats
CAM
[System
clock input
terminal,
TT
gre
tae
SN
ee
ge
siuieeacnes
ta
Hh
gta
ota
gts
se
LS
:
4
Vee
sj JY [WIN jt IY JY [4
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ae

PACKING VIEW
REF NO.
An nA BB WH HN &
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>
29052375 Y Master carton box <DX-6930BH>
29052376Y Master carton box <DX-6930S>
Accessary bag ass'y
2010098A Connection cord
2010200 Remote control cord
24140196 Y 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 X 250,Styrene bag
29365020E Warranty card
29100094A Styrene bag for warranty card
a4.
DX-6930
DX-6920
Remote
control
unit
Cord
Battery
NOTE: <BH>:Black model only
<S>:Silver model only

3)
@
33:10)
|
DX-6920
99
A62
MM
\
<
TNR:
\
\.
_
yi
A
f
8
\y
af}
vil
ct
A
pf
<
\
AI
/
CHASSIS-EXPLODED
VIEW
mAs

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
A71
28324140
Knob,power
<B>
AS
27141522Y
Bracket
HP
28324184
Knob,power
<S>
A6
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
200095
1
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
28324570Y
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>
WwW
1H194517-1
NADIS-4417-1,Display
circuit
pc
board
ass'y
28324579Y
Knob
FF
<S>
U3
1H194518-1
NAAF-4418-1,Headphone
amplifier
pe
board
ass'y
A35
28324580Y
Knob
REP
<B>
U4
1H194519-1
NAAF-4419-1,Headphone
terminal
pc
board
assy
28324581Y
Knob
REP
<S>
U5
1H194520-1
NAPS-4420-1,Power
supply
circuit
pc
board
ass'y
A36
283245
74Y
Knob
TEN
<B>
U6
1H194521-1
NAPS-4421-1,Terminal
pc
board
ass'y
28324575A
Knob
TEN
<S>
Z1
24800001
Y
NCD-113S,CD
mechanism
ass'y
A37
27150344
Shield
plate
P
<S>
A38
27150345
Shield
plate
<S>
A4}
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
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
A58
27211397Y
Tray
panel
<B>
Z\
ARE
CRITICAL
FOR
RISK
OF
FIRE
AND
27211398
Tray
panel
<S>
ELECTRIC
SHOCK.
REPLACE
ONLY
WITH
ve
Sapo
aaee
Giese
vies
PART
NUMBER
SPECIFIED.
00
x X
‘op me)
© ©
NOG
oe)

PARTS
LIST
ZX
fa
ao
oO)
DX-6930
Nw
oo
REF.NO.
PART
NO.
DESCRIPTION
REF.NO.
PARTNO.
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>
A5
27141522Y
Bracket
HP
28324184
Knob,power
<S>
AG
at
UeI
eS
pack
panel
A72
28324564Y
Knob,
level
<B>
ae
27300750
Busting
28324565Y
Knob,
level
<S>
Al0
27190524
KGLS-14R,Holder
A8]
29360807
Label
DANGER
at
27273149
soln
power
A82
29361218
Label
LASER
Bis
272702148
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
eo0as0107
A4TTC+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
Ad
87643010
W3
X
10F(BC),Washer
L901
5400916
A
ESD-R-25DB,Core
A31
27110689
Y
Front
bracket
ass'y
<B>
P90]
253164Y
or
A
AS-CEE250V2.5A,
27110690Y
Front
bracket
ass'y
<S>
253149
A
Power
supply
cord
A33
28324570
Knob,play
<B>
T901
2300776Y
AX
NPT-1138P,Power
transformer
283245T1A
POD
PIA
<9?
Ul
1H190516-2A
NAAR-4416-2A,Main
circuit
pe
board
ass'y
A34
28324572
BHO
ESSE
U2
1H190517-2
NADIS-4417-2,Display
circuit
pe
board
ass'y
28324573
Knob
FF
<S>
U3
1H190518-2
NAAF-4418-2,Headphone
amplifier
pc
board
ass'y
A35
283245
76Y
nob
REP'<}>
U4
1H190519-2
NAAF-4419-2,Headphone
terminal
pe
board
ass'y
eeeen
OX
even
See
US
1H190520-2
NAPS-4420-2,Power
supply
circuit
pe
board
ass'y
A36
PRA
EADI
AY
ney
TENE?
U6
1H190521-2
NAPS-4421-2,Terminal
pc
board
ass'y
PBAAASISA
ne
nes
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
AS1
1H192701K
Front
panel
ass'y
<B>
<S>:Silver
model
only
1H193701K
Front
panel
ass'y
<S>
hmm
anaae
NOTE:
THE
COMPONENTS
IDENTIFIED
BY
MARK
28125223AY
End
capR
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

»)
SK
10)
:
DX-6920
P LIST
MECHANISM-EXPLODED
VIEW
one
es
PICKUP
DRIVE
UNIT-EXPLOVED
VIEW
26
Tray
PART NO. DESCRIPTION
Belt
Washer
Loading pulley
2TTP+4S Tapping screw
Middle gear
Tray holder
ry
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Damper
Front tape
3TTB+10B(BC),Self-tapping screw
Chucking pulley
Chucking chassis
2.6TTS+6C,Self-tapping screw
27301227
27301230
Tray guide,left
Yoke damper Tray guide,right
2.6TTB+3C(BC),Self-tapping screw
Tray holder,front
Main chassis
Boss,back
2TTS+4C,Self-tapping screw
Leafswitch
oOo co YN DWN MN FR WwW LO
Magnet
—
Oo
Chucking yoke
27301224
24506890
834120049
25065402
—
i)
Gear cover
— N
Screw with washer
KSM-2101AAM, Pickup drive unit
_
Ww
_
BSS
Hinge holder
Hinge
2.6TTB+10B(BC),Self-tapping screw
W3 X 10F,Washer
Drive gear
2.6TTW+8S,Self-tapping screw
Connector pin
Motor pc board
838426108
8761301008
24506882
Motor ass'y
REMOVEMENT OF DISC TRAY
Screw for stopper
Screw for stopper
PARTS LIST
8
PART NO. DESCRIPTION
Wheel
Turntable chassis
1.Loosen
the
screw
for
stopper
until
the
head
of
screw and the tray are the same height.
2X5
,Self-tapping
screw
Motor
gear
2.Turn
POWER
switch
to
on.
Plate Motor pc board
Egat
3.Prees
OPEN/CLOSE
button
to
open
the
tray.
NSCT-4P223,Connector
4.Turn
POWER
switch
to
off.
2P+3F(BC)
Pan
head
screw
5.Remove
the
tray
=17
=
-18-

eo ee
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 1 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.
Oscilloscope range (
Vertical : 0.SV/div.
Holizontal : 0.5 ps/div.
DC, Ground: Center
le af 00 eB
jarrnarr
N
-*.
Pn*.*.%.%.%,
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.
ort hen.
P107
TR
Oscilloscope
P106
Vertical
:
500m
V/div.
Holizental : 1 ms/div.
Photo
2
GND
DC,
Ground:
Center
—-20-

ge
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
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
GND
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.
=O
Oscilloscope
Vertical : 0.2V/div.
Holizontal: 0.2 ms/div.
Oscilloscope
CH 1
CH 2
Vertical : 0.2V/div.
Holizontal: 0.2 ms/div.
PIO6
GND
8 HF
FE |
P1IO7 8 FE2
QjTE |
R06 TE2
TR OFFSET b)r
i09
RNG FOCUS OF FSET
TR GAIN RUT
FOCUS GAIN
Ean oe
DX-6930
DX-6920

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CIRCUIT
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HEADPHONE AMPLIFIER PC BOARD
HEADPHONE TERMINAL PC BOARD
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SCHEMATIC DIAGRAM
MODEL DX-6930
Q701
6-8T—1 25GK
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@ VOLTAGE WITH VOLTMETERC IS DC “VOLTAGE 1NO INPUT SIGNAL) |
UNLESS
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@ ALL PNP TRANSISTORS ARE BQUIVALENT TO 25A1015-QR
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@ ALL CAPACITORS ARE IN BF/SOW UNLESS OTHERWISE NOTED.
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@ ALL RESISTORS ARE IN CHS 1/6 WA UNLESS OTHERWISE NOTED.
@ THE THICK LINES IN PC BOARD ARE THE PRINTING SIDE OF THE PARTS.
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PRINTED CIRCUIT BOARD-PARTS LIST
MAIN CIRCUIT PC BOARD(NAAR-4416-1AP2A)
CIRCUIT NO.
Q101
Q104
Q106
Q108
Q109
Q110
Qlll
Q112
Q120
Q301
Q302
Q303
Q401-0404
Q901
Q902
Q903
Q904
Q906
Q102,Q905
Q103
Q105
Q113,Q115
Qil4
Q116,Q117
Q405,Q406
Q407,Q408
Qll9
QF101,QF102
D101-D104
D108,D109
D105
D110
D901-D904
D905-D908
D909
D912-D915
D910
D911
X301
L101
PART NO.
ICs
22240404
22240366
22240034
22240487
22240585
22240198
222741645
22240018
22240322
222755
22240321
22240520
22240201
222780055MIT
222790053
2227801 5S5MIT
2227901 SSMIT
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
X'tal
3010159
Coil
233411K100
DESCRIPTION
CXA1571S
CXA1372S
LA6510
CXD2500AQ
CXP50116-369Q
© LC3664NL-12
© 74HC164
M51943ASL
© LB1639
74HCO4P
YM3433
SM5861AP
NJM4565D-B
MS5F78M05L
79L05
MSF78M15L
M5F79M15L
78L05
2SA950-0O or
2SA950-Y
DTC114YS
STA341M-L
DTC114YS
2SA1015-GR
DTA114YS
2SK363-GR
2SD655-E or
2SD655-F
TOTX178, Transmitter
A IcP-N15
188133 or
1SS270A
MTZ5.6B
© SpD101
1SR139-100
RL203
1$S133 or
1SS270A
MTZ22B
MTZ5.1B
AT-38-169
NCH-1383
CIRCUIT NO.
C101,C105
C103,C137
C106
C109,C120
C110
Clll
C112,C141
C113,C124
C114-C116
C118,C144
C119,C122
C125,C130
C127
C128,C152
C129
C131,C136
C132
C133,C156
C134
C135,C139
C138,C155
C140
C143
C145
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,C418
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 pz F,6.3V.Elect.
4700pF + 5%,50V, Plastic
100 x F,6.3V,Elect.
220 u F,16V,Elect.
0.022 « F£5%,50V,Plastic
0.1 4 F+5%,50V,Plastic
0.047 « F£5%,S0V,Plastic
0.01 « F£5%,50V,Plasuc
0.1 w F+5%,S50V,Plastic
4.7 u F,SOV, Elect
0.1 «4 F£5%,S0V Plastic
220 u F,16V,Elect.
1 » F,SOV,Elect.
47 » F,16V,Elect.
0.47 « F+5%,50V,Plasuc
0.01 « F+5%,50V Plastic
0.47 uw F,S50V,Elect.
47 p F,35V Elect.
0.033 4p F25%,50V,Plastic
100 u# F,6.3V,Elect.
2200pF + 5%,50V,Plastic
1500pF + 5%,50V Plastic
100 2 F,6.3V,Elect.
1000 u F,6.3V,Elect.
0.47 2 F,50V Elect.
0.01 4 F45%,50V Plastic
100 u F,6.3V,Elect.
0.1 ¢ F£5%,50V,Plastic
47 » F,16V,Elect.
100 x F,6.3V,Elect.
220 F,16V,Elect.
22 uw F,35V, Elect.
100 F,6.3V,Elect.
1 w F,5.5V,Super
2200pF + 5%,50V, Plastic
100 « F,6.3V,Elect.
220 u F,16V,Elect.
100 pz F,6.3V,Elect.
0.22 4 F£5%,50V,Plastic
100 » F,6.3V,Elect.
100pF + 5%,125V,PP
270pF + 5%,125V,PP
2200pF + 5%,50V, Plastic
2200pF + 5%,50V Plastic
2000pF + 5%,50V,Styrole
220 u F,16V,Elect.
0.033 4 Ft 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
C921, C922
C924
R106
R109
R116,R117
R145
R146
P10]
PIO?
P103
P104
P106
P107
P901
P105
P30)
PART NO.
Capacitors
354742219
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 uw F,16V,Elect.
0.033 # F+5%,50V,Plastic
0.027 p F+ 5%,50V,Plastic
3300 » F,35V,Elect
2200 u F,16V,Elect
47 p F,35V,Elect.
2.2 4 F,S0V,Elect.
470 » F,16V,Elect.
220 u F,16V,Elect.
0.47 vp F£5%,50V,Plasuc
1000 u F,6.3V,Elect.
220 px F,35V,Elect.
470 » F,35V,Elect.
47 uw F,35V,Elect.
0.22 wu F=5%,50V,Plasuc
0.47 p F£5%,50V,Plastic
NO6HR22KBD,Semi-fixed
NO6HR2.2KBD,Semi-fixed
NO6GHR22KBD,Semi-fixed
RM1/101J 4.7K X7,Array
RM1/101J 4.7K X7.Array
NPLG-8P136
NPLG-9P 137
NPLG-4P132
NPLG-5P133
NPLG-2P29
NPLG-4P33
NPLG-8P122
NPJ-2PDBL1 84
@ NPJ-2PDBL199,Output
© NPJ-4PDWR197,Ourput
DISPLAY CIRCUIT PC BOARD(NADIS-4417-1/2)
CIRCUIT NO.
U701
$701-S712
§713-S715
$716-S719
$720,S731
$721-S730
Q701
C701
PART NO.
24130003
25035548
25035548
25035548
25035548
25035548
212109
353721019
27190754 Y
DESCRIPTION
DX-6930
DX-6920
HEADPHONE AMPLIFIER PC BOARD(NAAF-44 18-1/2)
CIRCUITNO. PARTNO. DESCRIPTION
Q501 222654 NIM4556D,1C
C501,C502 354744709 47 u F,16V,Elect. capacitor
R501 5142005A @ N16RGM20KB30F,
Variable resistor
5104242 © NI6RGM20KB30F,
Variable resistor
HEADPHONE TERMINAL PC BOARD(NAAF-4419-1/2)
CIRCUITNO. PARTNO. DESCRIPTION
Posi 25045139 HSJ-0540-01-010,
Headphone jack
POWER SUPPLY CIRCUIT PC BOARD(NAPS-4420-1/2)
CIRCUITNO. PARTNO. DESCRIPTION
C95] 3500065A A DE7150FZ103PAC400V/
125VJS capacitor
S951 25035558 A NPS-111-S520P,
Power switch
TERMINAL PC BOARD(NAPS-4421-1/2)
CIRCUIT NO. PARTNO. DESCRIPTION
2001191615 NSAS-16P0295,Socket
NOTE: @:DX-6920 only
©:DX-6930 only
GP1US0XS,Remote coniol sensor
NPS-111-S510,Push switches
© NPS-111-S510,Push switches
NPS-111-S510,Push switches
© NPS-111-S510,Push switches
NOTE: THE COMPONENTS IDENTIFIED BY MARK
Z7\ ARE CRITICAL FOR RISK OF FIRE AND
ELECTRIC SHOCK. REPLACE ONLY WITH
PART NUMBER SPECIFIED.
NPS-111-S510,Push switches
8-BT-125GK,FL tube
100 uw F,6.3V,Elect. capacitor
Holder FL
L230)

DX-6930 #@# DX-6930
DX-6920 | DX-6920
DIGITAL
OUT
BLOCK DIAGRAM
LOCK
R!IO6
eee TRACKING
OFFSET
OPTICAL PICKUP CORRECTION - RI6
TRACKING
KSS2I0A
©)
VARIABLE
Q40!1 Q405 Q403
¢ :
NWN
Oo =
a
rm
2)
S
Ms
€))
FIXED
W
a
a
=) oO
oO
Nn
>
Ww
7)
ao
7)
fa)
=
a
4
=
uJ
3
a
LL
<q
S
ns
oF
HEADPHONE
2
re
(So)
AMPLIFIER
=
.
=
&
aa
3
a
nae
=
Q407
=
&
|3!
XRST
70
4
BEYO
one
ay
O
a
a
2
+=
mk
6
R501
Q50!
5
E
Ww
U)
Om
O
|
5
oO
7p)
)
a
|
o.
:
aS
5
x
a.
oO
J
|
HEADHONE
=
AMPLIFIER
Oo
|
|
SLIO 20 Naw
— WJ
SLIDE
MOTOR
Or
©)
FIXED
©) VARIABLE
(w)
|
|
|
|
wow
|
|
[T
!
|
|
|
|
|
|
SPINOLE
MOTOR
Q13,Q14
GATE
CIRCUIT
O
4
Gizo.-*
VOLUME
:
DOWN
DRIVER
QI06
CLOSE
52
POWER
SUPPLY
CIRCUIT
TRAY MOTOR
MICROPROCESSOR
DRIVER
OPEN
Si
pSV
Q906
(m)
CXP50112-369Q
=
TRAY
5)
~
o
[-
=
MOTOR
i
O|°
a]
©
O
—15V
Q904
= oll @1 @ Oo p9i2 D913
WY '
>
2
4
b>
zy
2
5
S95!
Ie ob re)
rzZ
©2
6
3
aa
ONO
FAM
g
D905~8
-
POWER
SW
=
BUFFER|
|MEMORY
FILE
Zz
|
xe
72
P90)
L+15v Q903 = AC
= INPUT
OPERATION
=
~13V
1
KEY
2
S
8-
BT-125GK
Vi
Bi
QO
~5v
a902
Is
OUTPUT
ei
D90I~4
3
gov —[asor |
E
S
: lz
oO =
L_vF Q905 A
0909
Fl -
TO FL TUBE |
X
:
Ox-6930
ONLY
F2—
AI
|
T901
POWER TRANSFORMER
NPT-1138
HSA
ee
eae