Onkyo CR-185 User manual

ONKYO. SERVICE MANUAL
COMPACT DISC RECEIVER
MODEL CR-185
Black and Silver models
| UP | _230V_ AC, 50Hz
SAFETY-RELATED COMPONENT WARNING!! TABLE OF CONTENTS
COMPONENTS IDENTIFIED BY MARK A\ ON THE Spemibcatiomn elo ei eee eal: 2
SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE
CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK.
REPLACE THESE COMPONENTS WITH ONKYO PARTS ;
WHOSE PARTS NUMBERS APPEAR AS SHOWN IN THIS Laser waming Dae IS oi ss csi sscsseccts echscesv dacs casdenvetidscdssevstecesacesss
MANUAL. Microprocessor-connection diagram.... ive
Caution on replacement of optical pickup.
Protection of eyes from laser Deam.........s.csssssssssesssosesenseerese
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.
Exploded view
CD adjustment procedures
Tuner adjustment procedures..........s.csssssscscsssccssssosorsecnesnceseess 21
Service procedures.
Pc board view from soldering side.
Schematic diagram..............-sssscscsssccssssssssssecsesscnssacnceecesseceeeses
Pc board view from soldering side. F
Printed circuit board-parts list............sescessccoressssesssseeneneseesees
Schematic diagram (Mechanism)............sccsssssssesseccocssnsseeees 34
N K Gr Block diagrams. dei aes
AUDIO COMPONENTS Packing VieW..iccccesiscccccssteasescisscensasuouncceseusscstessseseanseues stseeesees

CR-185
SPECIFICATIONS
AMP SECTION
Power Output:
Dynamic Power:
Total Harmonic Distortion:
IM Distortion:
Damping Factor:
Sensitivity and Impedance:
Frequency Response:
Tone Control:
Single to Noise Ratio:
Muting
General
Power supply:
Dimensions:
Weight:
2 x 20 Watts at 4 ohms | kHz DIN
2x 17 Watts at 6 ohms 1 kHz DIN
2 x 15 Watts at 8 ohms 1 kHz DIN
2x 15 Watts min RMS at 8 ohms | kHz
no more than 0.2 % THD
2 x 24 Watts at 4 ohms
2 x 18 Watts at 8 ohms
0.2 % at Rated Power
0.2 % at Rated Power
40 at 8 ohms
TAPE / MD PLAY : 150 mV, 50 kohms
10 to 50,000 Hz : +0 /-3dB
Super BASS : + 13 dB at 55 Hz
BASS : + 10 dB at 100 Hz
TREBLE : + 10 dB at 10,000 Hz
TAPE : 100 dB (THF A)
—co dB
AC 230 volts, 50 Hz
185Wx 131Hx 329Dmm
(7-5/16" x 5-3/16" x 12-15/16")
4.0 kg (8.8 Ibs)
Specifications and features are subject to change without notice.
FM Tuner section
Tuning Range:
Usable Sensitivity:
50 dB Quieting:
Sensivity:
Capture Ratio:
Image Rejection Ratio:
IF Rejection Ratio:
Signal — to — Noise:
Ratio
Selectivity:
Harmonic Distortion:
Frequency Response:
Stereo Separation:
Stereo Threshold:
CD SECTION
Signal readout system:
Reading rotation:
Linear velocity:
Error correction system:
D/A converter:
Digital filter:
Number of channels:
Frequency response:
87.50 to 108,00 MHz (50 kHz steps)
Mono 12.8 dBf, 1.2 pV (75 ohms IHF)
1.0 pV (75 ohms DIN)
Stereo 18.8 dBf, 2.2 pV (75 ohms IHF)
25.0 pV (75 ohms DIN)
Mono 18.8 dBf, 2.4 nV (75 ohms)
Stereo 38.8 dBf, 24.0 pV (75 ohms)
2.0 dB
85 dB
90 dB
Mono 73 dB, IHF
Stereo 67 dB, THF
50 dB DIN (+ /- 300 kHz at 40 kHz Devi.)
Mono 1.0 %
Stereo 1.5 %
30 to 15,000 Hz (+/- 1.5 dB)
35 dB at 1.000 Hz
25 dB at 100 to 10,000 Hz
17.2 dBf, 2.0 pV (75 ohms)
Optical non-contact
About 500 — 200 r.p.m. (constant linear
velocity)
1.2-14m/s
Cross Interleave Read Solomon code
1 bit
352.8 kHz 8 times over sampling
2 (stereo)
5 Hz - 20 kHz
CAUTION
ON
REPLACEMENT
OF
OPTICAL
PICKUP
During repair,carefulley take the following precautions.
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 10M) 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.
(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.

CR-185
PROTECTION
OF
EYES
FROM
LASER
BEAM
DURING
SERVICING
This set employs a laser. Therefore, be sure to follow
carefully the instructions below when servicing.
WARNING!!
WHEN SERVICING, DO NOT APPROACH THE LASER
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
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 lable
This label is located on the chassis. -
DANGER INVISIBLE LASER RADIATION
WHEN OPEN AND INTERLOCK OR
TEE Ae REC EXPOSURE 10 BEAM,
CAUTION —sazaroous Laser AND
PLECTROMAGNETIC RADIATION WHEN OPEN
AND INTERLOCK DEFEATED.
ENTION _RAVONNEMENT LASER
ET ELECTROMAGNE HQUE DANGE
QUVERT AVEC L ECLENCHEMENT DE SeCURITE
VARNING
OSYNLIG LASERSTRALNING NAR DENNA DEL
AR OPPNAD OCH SPARREN AR URKOPPLAD.
BETRAKTA EJ STRALEN.
VARO!
ANATTAESSA JA SUOJALUKITUS OHITETTAESSA
OLET ALTTUNA NAKYMATTOMALLE
LASERSATEILYLLE. ALA KATSO SATEESEEN.
ADVARSEL: USYNUG LASERSTRALING
VED ABNING, NAR SIKKERHEDSAF-
BRYDER ER UDE AF FUNKTION.
UNDGA UDS/ETTELSE FOR STRALING.
® : Danger label
© : Only 230V
model
ADVARSEL
{USYNLIG LASERSTRALING NAR DEKSEL
APNES OG SIKKERHEDSLAS BRYTES.
UNNGA EKSPONERING FOR STRALEN.
Laser Diode Properties
@ Material: GaAlAs
@ Wavelength: 760 ~ 800 nm
@ Emission Duration: continuous
@ Laser output: max. 0.5mW*
*This output is the value measured at a distance
about 1.8mm from the objective lens surface
on the Optical Pick-up Block.
2. Class I label
This label is located on the left side of top cover.
LUOKAN 1
“CLASS 1 LASER LASERLAITE
PRODUCT” KLASS 1
LASER APPARAT
ADVARSEL
Denna maekning er anbragt pd apparatets hojre side og ind ikerer,
at apparatet arbejder med jaserstraler af klasse 1, hvilket betyder,
at der anvendes laserstraler af svageste klasse, og at man ikke
pa apparatets yderside kan blive udsat for utilladelig kraf tig
straling.
APPARATET BQ@/R KUN ABNES AF FAGFOLK MED SE RLIGT
KENDSKAB TIL APPARATER MED LASERSTRALER!
Indvendigt i apparatet er anbragt den her gengivne
advarselsmérkning, som advarer imod at foretage sadnne isdgreb
i apparatet, at man kan komme til at udsaette sig for lasers raling.
VAROITUS! LAITTEEN KAYTTAMINEN MUULLA KUIN
TASSA KAYTTOOHJEESSA MAINTULLA TAVALLA
SAATTAA ALTISTAA KAYTTAJAN TURVALLISUUSLY OKAN
1 YLITTAVALLE NAKYMATTOMALLE LASERSATEILYELE.

CR-185
MICROPROCESSOR CONNECTION DIAGRAM
uPD78044AGF-123
Q30!
SIGNAL
PROCESSOR
Ve
Q703 SYSTEM
R T
-
2
*
5 i °
z c
CDDATA
| |
!
1
1
= o
OPERATION 27 | ve, | |
wey
[26]
a
ee
ee
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owen
+5v
22
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|]
STOPPAGE Bt pial 74» |_|
DETECTOR
>
32
»
PD78044AGF
pst
23»
_| _|
a = a
INPUT SELECTOR oy v2 |
4.19MHz X'TA 7
osc | 3s | 70
36 | «os | w
Pp le || 2
Ciiaratal meaner ee ee
Qi131
PUL SYNTHESIZER
AND CONTROLLE P BUZZER
LM700)1
@| [outs] se |
Q
&
Q591.0592
AMP. +8
sw
ast
RDS DECOODER
PC134.0cS
4
xe aS
RI O =o ey
(N/OU Fe FO
on
| Operation | VOLUP output] VOLDOWN output
ae ae a
| vorup [| ow |
VOL DOWN
1 Barheie = -. >| 87.50~ 108MHz
Worldwide _|87.50~ 108MHz
Table 1 1 87.9~ 107.9MHz
Japan
Table 2
Table 3
FTO

TERMINAL DESCRIPTIONS
Function
4G710G
CDDATA
SQCK
Sense signal input terminal. Connect the terminal SENS of signal processor IC.
STEREO
AVSS
VOL UP Refer the table 1.
SBASS Super bass control output terminal.
Pin No.
17
<
o
—]
_
oy ~
~ wi
1
14
3 _
ZEB REGAL
ihistall
—
n
_ \o
20
21
22
23
24 Initializing setting terminal for the Frequency range.
25 IN/OUT Input terminal for tray open/close detection switches.
26 SIGNAL Signal level input terminal for automatic memory.
Operation key connection terminals
AVDD Analog power supply for D/A converter.
g
~
29
30
AVREF Reference power supply for D/A converter.
fill il
Crystal resonator connection terminal for sub system.
SS
<
We [2 fod TWO vu
Wd [= oo
>
Ceramic resonator connection terminal for main system.
Connect the 4.19MHz ceramic resonator.
Clock output terminal for PLL IC and the source selector IC.
RDS broadcast detection terminal.
Sub code detection terminal. Connect the terminal SCOR of signal processor IC.
Ww wa
36
37
38
39
40
41
42
> w
BISI5 (Z(EIZ SIZE
OjAlla |B TI IS IN Ic
~—
RIAN 21a |S ~
Ol> 1S |" 7 |>
>\s
Ww
44
45
46
Clock input terminal from RDS decoder.
nx
& |B 216
nw
System code output terminal.
> ~“_
49
50
EP
> QA SER)
z 9 5
Gis z
sla
Power supply terminal for CD mechanism
Defect output pin for CD mechanism.
aw~wIa zal
4|z
ies! ~]
bel E
SE
Optical pickup control output terminal.
Pu
OAD
ewes
eniompdaeta
ee
z
51
52
33
34
355
56
s7
58
59
iit
ia] nN
i
Zz a

CR-185
IC BLOCK DIAGRAM AND DESCRIPTIONS
CXA1372Q (Servo Signal Processor)
WOiVuvdWO? MOONIM [ asa]
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ONIMIV ML
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AdIHS INN
NOILVSNIdGWOD
3S Ord
[PIN NO. SYMBOL |V/O [DESCIRPION [PINNO. [SYMBOL [VO [DESCIRPION,
} VC TT | Mid-point voltage input terminal. [| 23(XLT___|_1 [Latch input terminal for microprocessor. |
Connect the capacitor between FS3andthispin | _24{DATA __| I [Serial data input terminal for microprocessor. __|
2 when the high frequency gain focus servo [____2S|XRST__| 1 [Resetinputterminal.Activelow.
is dropped. | ___26{C.0UT___| © [Signal ourput to count the track numbers.
i ecient all Ee
input terminal. according command from the microprocessor.
FLB Input terminal for the low frequency boost of [__29[MIRR___| O [Mirrorcomparator outputterminal.
pe Neeser. aber To leted eomemrens usec eran
FEO 9 Focus drive ourput terminal. | 3K{ASY _[_{ [Auto asymmenry conwol input terminal.
| ____«|FE- |_1 [Inversion input terminal of focus amplifier. [__32{EFM___'| O [EFMcomparator output terminal. |
Lee fee als algae Pe a es select =| ore beam ine eee ee
waveform. | 34{CCi_ 0 [Defect boom hold outputterminal.
eee
terminal. 37|CB__[_T_ [Defect bottom hold capacitor connection terminal, _|
| 1i[TAO | O [Tracking drive outputterminal. S| ~SSBICP ss [Mirror hold capacitor connection terminal. |
| 14|SLO [0 {Sied drive ourputterminal |S AQTZC OT | Tracking zero-cross comparator input terminal. |
| __t5|St-___| _I_ | Inversion input terminal of sled amplifier. [43/TE ss [Tracking errorinputterminal,
Sees ener ee
focus tracking. when defect.
This terminal is flowed the current so that the ee ae Window comparator input terminal for ATSC
7 focus search,tarcking jump,and sled kick height detection.
is decided. { —-461FZC —si|_1._ [Focos zero-cross comparator input terminal.
[——TaISSTOP 1 [inner swich sclection input emia, | 47]FE [1 Focus error input terminal,
|_____20(DIRC __|[_I_ [This terminal is used when track jump. 4 FDFCT aa Capacitor connection terminal for time constant
ae The sted runaway prevention circuit operates when defect.
at the low level.
i eae G2 Serial data transfer clock input from
microprocessor.

CR-185
SM5875BM (DA CONVERTER)
LRCI
DI
(8) (6)
INPUT INTERFACE
FILTER ARITHMETIC
AND
ATTENUATION
ARITHMETIC
ATTENUATION
MUTE COUNTER
MODE @3)
RSTN 3)
| conn:
ne D CONTROL
(i9) XTO
pvss @)
PWM DATA NOISE SHAVER
GENERATION ARITHMETIC xTI
vi
pvop © BLOCK BLOCK
TSTN (9)
G7) XVDD
TO1
TO2
AVDDL
(11)
AVDDR
LO AVSS RO
MODE=H:Muting control pin
70
De-emphasis control pin. On at high level.
MODE=L: Attenuator level control pin
Analogue supply pin for left channel
Clock output pin: 16.9344MHz
Analogue signal output pin for left channel
Test output terminal
Supply pin for resonator system
Crystal connection or external clock input pin
Crystal connection pin
Supply pin for resonator system
Playback speed select pin. Double speed at H

CXD2500A/BQ
(Digital
Signal
Processor)
9 DAO!~I6
9 MUTE

CR-185
[no. |syMBoL |yo[pescrrrion ss CC™—~—~—~CSCSC*dS_NO._ | SyMBO_| YO DESCRIPTION
1
Irok
|
1
|roucsOkinpt
SS
SS™S™~—~sSCS
Ea
sO
|
[DAOS
—GESoupr
|
2
[rsw
|
©
[Output
filter
changeover
output
for
spindle
motor
||
43
|DAO7
|
O
[DAG7
_—IRFCKoupu.
3
[MON
|
[Spindle
motor
control
ouput
Cid
|
44
AOS
|
©
[DADS
—*[C2POoupu
Cd
4
|Mpp
|
0
[Spindle
motor
servoconrol
Sd)
|
45
—IDAOS
|
O
[DAOS
—|XRAOFoupu
Ts
Imps
|
©
[Spindle
motor
servocomrot
Ss
|
46
(DADS
«|
[DAOA
—|MNTSoutp
|
6
|tock
|
O
|HwhenGrSisthehighievel
«|
|
47
_‘[a03
|
[DAO3
[MNT
2ompur
[7
Inc
|
|.
T™t™~™~—.
CC~C*~*~*SYCSYT=SC48
a
~—s
fc
DAD
—MNTiompuw
|
|vcoo
__|
©
|Oscillation
circuit
output
for
analog
EFM
PLL.
[49
|Daor
|
O
[paot
_—s[MNTOoupm
ike i eeereet ie eter [50_[APTR | © |Controt output for aperture correction. H when R ch._|
(8.6436MHz
[51
{APTL
|
©
[Control
output
for
aperture
correction.
H
when
L
ch._|
to
frest
[1
[Testemint
—SSSS—™—~—CSsS—SS—S
|S
vss
|
Grounderminds
SC
—E
T2
[vss
|
[Grounduermind
33.8688MHz
input.
risisinc.
|
|
—™—SC~C~CS
84
Fx
[0
[crystal
oscillation
circuit
output
of
16.9344MH2.
|
|
46
|VPCO
_|
O
[PLU
charge
pump
output
for
variable
pitch
eal
cee
Go
selection
input
terminal.
L
when
16.9344MHz.
ee
ae
Clock
input
for
variable
pitch
from
VCO
H
when
33.8688MHz.
16.934MHz [36 _[estr___| © 2/3 divided ouputof pins 53 and54.
Yas
[ro
|
©
|FikerourputformasterPLL.
Sd
|_S7_
CAM
To
[4.2336MHzoup
19
Temi
1
1
[rimer
input
for
master
PLL.
SSSS~s«_
88
|cugM
[0
fi6.9344MHzoupm
=
|
20
Ipco
_|_©
|charge
pump
output
of
master
PLL
1
~s9
[mp2
sr
|
Digital
oui
pat
contro!
input.
On
at
high
level.
|
21
|AVss
|__|
Analog
ground
60
_|pout
|
©
[Digiatoupn
.
2
{erty
__|_1
[vcO
contol
voltage
input
for
master
[61
|EMPH
|
O
[Emphasis
conwol
ouput.
Active
high,
|
|
23,
[AVDD
|__|
Analog
section
power
supply
(+5
|
62_|weck
|
0
|Writeframeclock
outpt
ee
ale
aaa
95
|BIAS
|
1
{A
mmety
circuit
constant
current
input
or
SI.
|
9%
lasyr
|
1
[a
mmetry
comp
or
voltage
input
|
64_|sBSO_|
©
|Serial
ourputof
subcode(P~W)
T_27
lasyo
|
O
\EFMfullswingouput
|
65
|EXCK
|
1
|Ctock
inputforreadouSQso.
Pte
ecm
[Foes
ae
ree
el
ee
eee
output.
Pee
Audio
data
output
mode
changeover
input
|
_67_|sgcx
|
1
|ClockinputforreadoutSQsO_
Serial
data
at
L
and
paraller
data
at
H.
[68
[MUTE
|
©
[Mutingconwrol
ouput.
ActiveH.
Par
[wack
__|_1
JD/A
interface
for
48
bits
slot.
Word
clock
f=2Fs.
|
|_69
[SENS
|
[Sens
ourput.
Output
to
the
microprocessor
|
Y
32
|URCK
|
_1
[D/A
imestace
for
48
bits
slot.
LR
clock
f=Fs._|
70
_|xRsT
__|
1
|System
reset.
Resetatthelow
level.
T~33
Ivpp
___|__frower
supply
terminal
(+5V)
«|
|_71
[DATA
|
_1
[Serial
data
input
from
the
microprocessor.
|
as
Dal
al
=n
YT
|S
C=*d:SsédP
sum
[pssu-o
Latch
the
serial
data
at
the
wailing.
|
34
[pais
_|
O
|DAt6
[73
|vpp
|
[Powersupply
remind
[35
(DAIS
|
O
DAIS
_[Bitclockof
48
bits
slor__|
|
74
[cox
|
1
|Serial
data
transfer
clock
input
from
microprocessor_|
|
36
[DAis
|
O
|DA14
__|Serial
data
of
64
bits
slot_|
[75
[sein
|
1
|SensinputfromSsP_
DAI3
TO
|DAI3
_[Bitclock
of
68
bits
slot__|
CNCI
1
[Track
jump
numbers
count
signal
input_
|
|
38
|DAI2
|
O
|DAI2
_
LR
clock
of
68
bits
slon__
|
77_[DATO
|
0
|SerialdataoupmoSSP_
[39
{pai
|
O
[DAN
—(GTOPowpur
[78
|xtTO
|
©
[Serial
data
latch
output
to
SSP.
Latch
at
wailing.
_|
[4
|paio
|
Oo
|DaAio
—|xUGFoupu
[79
[ctKo
|
0
|Serial
datawansferclock
ouput
to
SSP.
|
41
|DAo9
|o
[paog
_|XPLCK
output
[80
_[MIRR
|
1
[Mirorsignalinpr
Note: SSP: 1C101 CXA1372Q

CR-185
BA1448S (AM Radio, FM IF, and Stereo System)
[No. | Terminal Descriptions
[1 [EM IFamplifierinputterminal | 13
Groundterminl | 16 [FM/AM detectorsignal output terminal |
= =
Terminal Descriptions
| a |
[7 stereo indicator terminal | 19 [AMmixer outputterminal |
[8 [tFrequest and Muting terminal | 20 [AMamtennatermingl
[9 |iFsignaltermin |
[11 [Leftchannel output terminal | 23 (Reference voltage terminal
AM local oscillator output terminal
LM7001 (PLL Synthesizer and Controller)
aé.
Tuning indicator terminal 18 | AM FF input terminal
10
AMIN
'
j

CR-185
XOUT Connect the 7.2MHz crystal resonator.
7
lupe [upFsetectoroup,
[ANT [Antenna selector output. A athigh evel andBatlowlevek |
SAT/ E
LPF
FM local oscillator input terminal.
Power source terminal for back-up.
VDD2 Power source terminal.
Phase comparator output
15 Phase comparator output
4
12
13
Ground terminal
uPC1346CS (RDS DECODER)
BIPHASE
DECODER
DEF.
Description Description
Supply voltage for the digital circuit Ground for the analog circuit
Resonator input | ia |intec _| Integrating filter terminal
Adjustment fc of band pass filter
Ground for the digital circuit Biphase signal output
Test input
te
| 19 |
Zz ¢
:
Resonator output
Qa 10 1O I<
B ip le (2 [2 |
TERED
Zk IS Id
4
i
PER
e) :
SOUT
OCK OUT
ATA OUT
as, i
12
oO

LEVEL SHIFTER
i a, a
LATCH CIRCUIT
LATCH CIRCUIT
TC9184P (Electro Tone Volume)
TREBLE + TREBLE - COM BASS - BASS +
Function
| No. |Symbo!__
Fs ocean
| 16 |vpp__|
Volume terminals
BASS -
(Ground terminal for digital section
‘Clock input terminal to take in the data of terminal DATA.
~12—
Peet
‘ a

CR-185
TA7291 (VOLUME MOTOR DRIVER)
Vcc Vref
ourpur {|
Cw/CCWw
CCw/CW
BRAKE
CCW:Counter clockwise direction
CW:Clockwise direction
INI = IN2 GND
REMOVEMENT OF TRAY ASS’Y
Remove the top cover.
Turn the locked screw to the clockwise to release the lock of gear.(Refer fig. 1)
Pull out the tray ass'y.
Remove the stopper.(Refer fig.2)
Press the tray stopper to the arrow mark direction and remove the tray ass'y.
UNLOCK
~
ie iO Front Panel
Clear Plate
fig. 1
—~13—

CR-185
MECHANISM-EXPLODED VIEW
—14—

102
10}
4)
PARTS LIST
REF.NO. PART NO.
1 24840053
3 24822014
4 24810020
5 24840061
7 24830003
8 24832004
9 24836013
10 24810024
11 24802012
12 24820023
15 24840075
17 24802013
19 24810021
20 24840063
21 24840064
107
{
Ch)
:
© RI2
Pe
Sey
ARs [Ud
DESCRIPTION
Tray
Gear cover
Tray gear
Chucking plate
Chucking yoke
Magnet
Damper
Chucking plate
Sub-chassis
Spring
CD servo pcb ass'y
Main chassis
Drive gear
Control cam
Leafswitch
—15—
102
110
REF.NO. PART NO.
22 25055369
23 24840066
24 24840067
25 24810022
26 24810025
27 248 16008
101 24828006
102 =. 24836014
104 =. 24822015
105 24820024
106 24824003
107 24110011
108 24810023
109 24802014
110 24804012
CR-185
108
DESCRIPTION
NPLG-5P352,Plug
Loading motor pe bourd
Loading motor
Middle gear
Loading plate
Belt
Sled shaft S
Insulator S
Plate S
Spring
Center ring
KSS-240A, Optical pckusp
Wheel
Chassis
Motor gear

CR-185
PARTS LIST
REF.NO. PART NO. DESCRIPTION REF.NO. PART NO. DESCRIPTION
1 27110865 Front bracket <B> F901 252063 A\ 0.5A-SE-EAWK, Primary fuse ae
27110866 Front bracket <S> P301 2046223012 NCFC6-223012, Flat cable %
3 27100296 Chassis P701 2047350512 NCFC7-350512, Flat cable 7
5 27122062 Rear panel P901 253193HIT _A\ AS-CEE, Power supply cord
7 28184583 Cover, mechanism Q557,Q558 2202063, 28C4511-0,
9 27160350 Radiator 2202064 or 2SC4511-Y or
10 28184584 Cover, radiator 2202066 2SC4511-P, Transistor
11 27300750 A\ #2271, Cord bushing Q559,Q560 2202053, 2SA1725-0,
15 838130088 3TTB+8B, Self-tapping screw 2202054 or 2SA1725-Y or
16 870065 Washer PT 2202056 2SA1725-P, Transistor -
17 830440089 4TTC+8C(BC), Self-tapping screw T901 2301108 or A NPT-1241P or
18 801433 3SMS8W.SW+14B(BC), Sems screw 2301125 A NPT-1241P, Power transformer
19 838130088 3TTB+8B, Self-tapping screw Ul 1H266558-2 NAAF-5458-2, Preamplifier circuit pc board ass'y
26 28175213 Isolating plate U2 1H266559-2 NAPS-5459-2, Power supply circuit pc board ass'y
27 27301815 - Cover F U3 1H266560-2 NADIS-5460-2, Display circuit pc board ass'y
31 28184585 Top cover <B> U4 1H266562-2 NAAR-5462-2, Tuner circuit pc board ass'y
28184586 Top cover <S> U5 1H266563-2 NAAF-5463-2, Main amplifier circuit pe board ass'y
32 838430088 3TTB+8B(BC), Self-tapping screw <B> U6 1H266564-2 NAETC-5464-2, Speaker terminal pc board ass'y a
834230088
3TTS+8B(Ni),
Nickel
screw
<S>
Zl
24800009C
NCD-130S,
CD
mechanism
ass'y
.
37
28141264
t5*80*15,
Cushion
7
51 27211710 Front panel <B> NOTE: <B>: Black model only
27211711 Front panel <S> <S>: Silver model only
52 801230 3TTS+8B(BC), Self-tapping screw
53 28135241Y Badge
54 28133311 Back plate <B>
28133260 Back plate <S>
55 28191711 Clear plate NOTE: THE COMPONENTS IDENTIFIED BY MARK A ARE
56 28191712 Clear plate RE CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK.
58
28148307
Door
<B>
REPLACE
ONLY
WITH
PART
NUMBER
SPECIFIED.
f
28148308 Door <S> a
61 27175252-1BY Leg
62 838130088 3TTB+8B, Self-tapping screw
64 29360687 Label CLASS 1
65 29361862 Rating label
81 28325130 Knob, volume <B>
28325131 Knob, volume <S>
91 260208 Wire tie
92 29361731A Label
93
834130087
3TTS+8S,
Self-tapping
screw
a
46

CR-185
\ u
Ny
eon
Ni
8
Ly
: PK iyi;
A
NN
{}
/,
0
7
ma)
5
A
>)
3
(
ay
Wr
f
ANY
=
0
iL&
G
/ f /
/
0 f / \
/
EXPLODED VIEW
oN
—~18—
—17—
V16571 / Druck 1

ADJUSTMENT PROCEDURES
It is not necessary to perform the adjustment of optical pickup.
This confirmation should be made when replacing the optical pickup.
1). Connect the oscilloscope to test points RF and VC.
Osilloscope
DC range
RF/Servo pc board
TPF) G
TP(VC) G
2). Turn the power switch on.
3). Load the test disc YEDS-18 on the tray and press the play button.
4). Confirm that the waveform on the oscilloscope is optimum eye _
pattern and optimum level as shown photo 1.
Optimum eye pattern means that shape "©" can be clearly
distinguished at the center of the waveform.
RF signal waveform
CH P1i36.2e4 A .Syps
CH1 445 .Sihz
CH S@uU cxasSGal
A=1.2V + 0.2 (Vp-p)
—~19—
V16571 / Druck 2
Focus/Tracking Gain Adjustment
A frequency response analyzer is necessary in
order to perform this adjustment exactly.
However, this gain has a margin, so even if it is
slightly off, there is no problem. Therefore, do not
perform this adjustment.
_Focus/tracking gain determines the pick-up follow-
up (vertical and horizontal) relative to mechanical
noise and mechanical shock when the 2-axis device
operate.
However, as these reciprocate, the adjustment is at
the point where both are satisfied.
@ When gain is raised, the noise when the 2-axis
device operates increases.
When gain is lowered, it is more susceptible to
mechanical shock and skipping occurs more easily.
When gain adjustment is off, the symptoms below
appear.
e The time until music starts
becomes longer for STOP
+ DPLAY or automatic
Selection (Ke@ PPE buttons
pressed. (Normally takes
about 2 seconds.)
e Music does not start and
disc continues to rotate
for STOP —>DPLAY or
automatic selection (Ked
bt buttons pressed.)
e Sound is interrupted dur-
ing PLAY. Or time count-
er display stops progress-
ing.
e More poise during 2-axis
device operation.
The following is a simple adjustment method.
~ Simple Adjustment —
Note: Since exact adjustment cannot be performed, remem-
ber the positions of the controls before performing the
adjustment. If the positions after the simple adjust-
ment-are only a little different, return the controls to
the original position.
oscilloscope
(OC range)
Procedure:
Main board &
TP (FEO) a ey +
!
ck
TP (VC)
|
TP (TEO) Om- -?
. Keep the set horizontal.
If the set is not horizontal, this adjustment
[sao be performed due to the gravity against
the 2 axis device.
.
Insert
disc
(YEDS-18)
and
press
>
PLAY
button.
.
Connect
oscilloscope
to
RF/
Servo
board
TP
(FE).
. Adjust RV102 so that the waveform is as shown
in the figure below. (focus gain adjustment)
VOLT/DIV: 100mv
TIME/OIV: 2mS
100 mv
Ov
@
Incorrent
Examples
(DC
level
changes
more
than
on
adjusted
waveform)
low focus gain
VOLT/DIV: 100mv
TIME/DIV: 2mS
high
focus
gain
VOLT/ODIV.
100
TIME/DIV: 2mS
5. Connect oscilloscope to RF/ Servo board TP (TE).
6. Adjust RV101 so that the waveform is as shown in
the figure below. (tracking gain adjustment)
VOLT/OIlV: IV
TIME/OIV: 2mS
@ Incorrect Examples (fundamental wave appears)
low tracking gain
VOLT/OIlV: IV
TIME/OIV: 2mS
high tracking gain
(higher fundamental wave than for low gain)
VOLT/OIv: 1V
TIME/OIV: 2mS
nA Ae A fw Ahab
med b dy y Vv verti
Adjustment Location: RF/ Servo board

V16571 / Druck 3
ADJUSTMENT
PROCEDURES
Preparation
1. Input
FM mono: 1kHz, 75kHz devi., 60dB/ 2 V
FM
stereo:
1kHz,
67.5kHz
devi.,
60dB/
V
Pilot
signal
19kHz
7.5kHz
devi.
2. Outputs
Connect the non-inductive type resistor of 8 ohms
to the all speaker terminals unless otherwise noted.
FM
ADJUSTMENT
Connection FM SG Stereo modu-| Tuning
of instrument output lator output | frequency
99.0MHz
1kHz 75kHz devi. AC voltmeter] TF? on the
65dBf(60dB) atcod
99.0MHz
:
i :
Signal
Muting ‘ 99.0MHz | Oscillosco;
AC voltmeter
Generator
Oscilloscope
FM MUTE/MODE
switch: MONO
FM MUTE/MODE
switch: AUTO
Output
or
Oscillo-
Generator
scope
<Fig. 2>
RDS
decoder
J
.
*
Signal
Oscilloscope
AF
oscillator
Generator
—-21—
Output Adjustment Adjust
indicator point for
CR-185
SERVICE PROCEDURES
1. Replacing the fuses 3. Safety-check out
After correcting the original service problem, perform the
i [Tt This symbol located near the fuse indicates that the following safety check before releasing the set to the customer.
fuse
used
is
fast
operating
type.
For
continued
protection
against
Connect
the
insulating-resistance
tester
between
the
plug
of
power
supply cord and the screw on the back panel.
Specifications: More than 10 MQ at 500V.
fire hazard, replace with same type fuse. For fuse rating refer to
the marking adjacent to the symbol.
= =a Ce symbole indique que le fusible utlise est a rapide.
Pour
une
protection
permanente,
n'utiliser
que
des
fusibles
de
4.
Memory
preservation
meme
type.
Ce
darnier
est
indique
la
qu
le
present
symbol
est
This
unit
does
not
require
memory
preservation
batteries.
appose.
A
built-in
memory
power
back-up
system
preserves
contents
of
the
memory
during
power
failures
and
even
when
the
unit
is
CIRCUIT
NO.
PART
NO.
DESCRIPTION
unplugged.
F901
252063
0.5A-SE-EAK,
Primary
The
unit
must
be
plugged
in
and
the
power
switch
turned
on
and
off once in order to charge the back-up system. Note that since
this is not a permanent memory, the power switch must be t
2.
To
Initialize
the
unit
pe
ry
po
umned
This device employs a microprocessor to perform various
functions and operations. If interference generated by an external.
on and off a few times each month the keep the back-up system
operative.
The period of the time during which memory contents are
power
supply,
radio
wave,
or
other
electrical
source
results
in
. ‘
preserved
after
power
has
last
been
turned
off
varies
depending
accident
which
causes
the
specified
operations
and
functions
to
:
;
on
climate
and
placement
of
the
unit.
On
the
average,
memory
operate abnormally.
dj
f
contents
are
protected
over
a
period
of
3
to
4
weeks
(a
minimum
To
perform
a
result,
please
follow
the
procedure
below.
;
:
of
2
weeks)
after
the
last
time
power
has
been
turned
off.
This
period is shorted when the unit is exposed to very high humidity
1.
Press
and
hold
down
the
MEMORY
button,
then
press
:
.
Kak
or
used
in
an area
with
an
extremely
humid
climate.
the OPEN/CLOSE button.
2. Press the POWER button.
3. After “clear” is displayed, the preset memory and each
mode stored in the memory, are initialized and will
return to the factory settings.
Rio!
Gy] Mute pi
MA vever en
TUYOO!
Adjustment
point
—22-—

PC BOARD VIEW FROM BOTTOM SIDE
Ald-0Aa
a i
ae
zio
Ta
¢ 23u-0N
25135459
NEPS-5459 .
1
telat te
OsY-L
¥
PREAMPLIFIER CIRCUIT PC BOARD
POWER SUPPLY CIRCUIT PC BOARD
MAIN AMPLIFIER CIRCUIT PC BOARD SPEAKER TERMINAL PC BOARD
— 23 - —24—
V16571 / Druck 4