Sony CFD-444L User manual

SERI|ICE
MANIJAL AEP Model
Model
Name
UsingSimilar
Mechanism cF5-3000L
Tape
Transport
Mechanism
TYPe MF-D444-75D
I
SPECIFICATIONS
CD playor
seclion
System Compact
disc
digital
audio
system
Laser
diodeproperlies lvaterial:
GaAlAs
Wavelength:
780nm
Emission
duration:
Conlinuous
Laser
outpul:
Max04
mw *
*Thisoutput is the value
measured
at a distance
of about l.6mm lrom theobiectivelenssurtace
onthe
optical
Pick'up
block
Frequencyresponse 20-20'000Hz1ldB
Radio s€ction
Frequency
range FM: 87.6-1og MHz
MW: 530- l ,605 kHz
LW: 150-285 kHz
SW:
6-18 MHz
Anlennas FM/SW: Telescopic
antenna
MWLW: Builf
inferritebar
antenna
Tage tecold€r sgclion and genetal
Recording
system 4'track2€hannel stereo
i""t *inO-ini ti." Approx.l.smin with Sonycassette
C6O
Frequency
response 80-10
000
H?
Speakers Full-range
speâkers:
tocm dia
' cone
type
Tweeler:2cm
dia.,ceramlc
lYæ
Peak
musicpower outPut
Outputs
Powerrequirements
Power
consumPtron
8atterylile
Batteries Sony
SUM.1
(NS) Sony Alkaline
AM1
FM recording Approx.
12 Approx.
l7
Disc recording Approx.3 Approx.3.5 (hour)
22W(11W+1lW)
Line
input
jacks
(phono
jacks)-2
Sensitivity
0.3V
Input
impedance
47kilohmsor higher
Headphones
jack (stereo
minijack)
For8-32ohms impedance
headphones
CD output jacks (phono
jack)-2
Loadimpedance
l0kilohms or higher
Ratedoutput
1.4V
rms
atloadimpedance
47kilohms
22OV AC, SOHz
DC 12V,8 size
D (R20)
batteries
AC40W
Dimensions
Weight
Supplied
accessory
67
4
\221x 177mm \w
lhldl
(æ%x8%xTinches)
incl. poecting Parts
and controls
6.2k9
(13lb
11oz)
incl.batteraes
AC powercord (1)
TM/MTI'/LVSIï
C
OMPACT
DISG
CASSETTE.GORDER
SONY.

SONY
SERI|ICE
MANIJAL AEP Model
c705 1-130483.00
c711 1-130-483{0
c'112 1-124-963-11
c713 1-r30.48300
(lncorrectl
MYLER O.O1MF
MYLER O.O1MF
ELECT 33MF
MYLER O.Ol IVF
(lncorrectI
none
(lncorrectl
none
50v
50v
16V
50v
lT"s"
461
c795
IP"r"4-1
RS701
F"s-"
48
|
R70'l
lT"r"4tl
(lncorrectl
1-249433-11 (RF
BOARD)...CAR8oN100K5%
RV701 1-237441-11
RV702 1-231442-1'l
(lncorrectl
RES, ADJ, METAL GLAZE
RÊS, ADJ, METAL GLAZE 20K 50K
22K
47K
{Correct}
1-230€95.11 RES, ADJ, MÊTAL GLAZE
1.230.608.11 RES, ADJ, MÊTAL GLAZE
Sony Corporation
Audio Group
CORRECTION-1
File
thiscorrection-1with
theservicemanual.
5%
50Â
20%
5%
À1-532439-21
1
|
4W 1
-249433-1
1
(Correctl
none
none
1-124469-'t1 E
LECT 220MF 20% 6.3V
none
(Correct)
1.102-110-00
CERAMTC
220PF
{Correctl
LINK, IC
(Correctl
(RF
BOARD)...
CARBON22K 5y. 1t4W
Englidt
aaao547-1
Printed
inJapan
@ 1988.
1
9.952-980-91

sEcTroN1
OUTLINE
ThoCFD"444
isa casseilecorder
equip@ wltha FM/AM
luner,
compact
dlscplayer,
andlh€ separato
speakers.
CDplayer
3octlon
. Repeal
play
to rep€at
one
orallthsselecÙons.
. Shuttlo
play
to ptay
theselections
inrandom
order.
o
Program
plây
to play
the
selections
in
adosired
order.
Caseette
decksectlon
o
Synchronlzcd
CDæcodlng stad lyltem
General
. $band
graphlc
equallzer
toadiustthe
tone
quality
to
your
preference.
. Powor
outpul
of 4W+4W (measur€d
attheFTC
regulation)
NOTES
ON HANDLING THE OPTICALPICK.
UP BLOCKOR BASEUNIT
The laser diode in the optical pick-up block may
suffer electrostatic breakdown because
of the poten-
tial difference generatedby the chargedelectrostatic
load,etc.
on clothing
and
thehumanbody.
During repair, pay attention to electrostatic break-
down and also use the procedure in the printed
matter which is included in the repair parts.
The flexible board is easily damaged and should be
handled with care.
SAFETY.RELAlED
COMPONENl
WARNING!
!
COMPONENTS
IOENTIFIED
BY SHADING
AND MARK
7\ orrr rxe scHEMATtc DIAGRAMS AND tN THE
PARTSLIST ARE CRITICAL
TO SAFE OPERATION.
REPLACETHESE COMPONENTS
WITH SONY PARTS
WHOSE
PART NUMBERS
APPEAR
AS SHOWN
IN THIS
MANUAL
OR INSUPPLEMENTS
PUBLISHED
BYSONY.
CAUTION
a use ot controts
or adjustments
or pertormance
ol
proceOures
olherthanthose
specitjed
he.ein
mav
reSull In hazardoL,'s
radialron
erposure
-2-

l"ro\
4t/
Chuck PlateJig for Repair
When repairing the CD section, use the chuck plate
jig in order to play a discwithout usingthe CD cover.
Chuck platejig part No.: X4918-255-l
Chuck platejig component parts:
Noteson SpindleMotor Repairing
Thespindle
motor (M702)
usedin thissetis pressed
into turntableassy,but the repair
parts
âre
suppûed
separately.
rfihen
replacing,order
bothturntableassyandspindle
motor.
Theinstallationdimension
isasshown
below.
19.4x0.
I mm
TABLE OF CONTENTS
Title
Section
Specifications
Features
Noteson Handling The Optical Pick-up
Block or BaseUnit
Chuck Plate Jig for Repair
Noteson SpindleMotor Repairing
Location and Function of Controls
ServiceMode(serviceprogram). . . . .
Notes
onLaserDiodeEmission
Check .......
1. BLOCK DIAGRAMS
Page
I
+
q
I
2
2
J
4
6
7
8
9
l-l. Radio/RecorderSection
1-2. CDSection
2. DTSASSEMBLY ....11
3. ADJUSTMENTS
3-l . Mechanical
Adjustments
3-2. Electrical Adjustments
AM Section
FM Section
RecorderSection .
CD Section
Reference
4. DIAGRAMS
4-1. Radio/Recorder Section
Mounting Diagram
4-2. Radio/Recorder Section
Schematic
Diagram
4-3. CD Section MountingDiagram
4-4. CD Section Schematic Diagram
4-5. IC Block Diagrams
EXPLODED
VIEWS
AND
PARTSLIST .....36
ELECTRICAL
PARTS
LIST......... 42
l3
l4
14
l5
t7
l8
2l
z5
25
28
JI
5.
6.
Troubleshootion
Guide
.. ........ 50

o
o
o
o

cFD-444L IPage
29,
30 | 17 ,correcred porrion

I cFp-444L
$'4q'SS\
\ tc704 ^,,1\
;\,it-trtm
t-
rnalsurtol'tf
:RD______!1.,,"-.,. cNJ-(.
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Etu-
, -l*aoeJ-;;1 lf4.";l l-tr] :-,
l1 lJi[] l?L4.lr
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l::ll:;lI l;ffi:o
tg
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E
ICD
LEAF
SW
BOARD)
-3-

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ouvog
l8)
l?A
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.IluIu! |
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ffizt I
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rtuo eceldeg '^lalas rol lerulrs "'" ". ----. .U
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uoluod
pelcarlo.
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I l.*,iti3i
Itowæ-
282'tâ20
gti?,t11' izi\
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sllt :
:
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cFD-444L
23
22
21
Fati
Notr:
. Atl capacitors
are in tlF unlessotherwisenoted. pFt rjpF
50WV or lessare not indicated except for electrolytica
and tantalums.
All resistorsare in O and %W or less
unle$ otherwise
soecified.
- i B+ bus.
f: : adjustment
tor repair.
Vollages
are dc wilh respect to ground
unlessolherwise
L/u
U L .*', noted.
o Readings are taken under service mode with a VOM
(50
kç}/v).
no mark
: STOP
( ):
PLAY
. Voltagevariat;ons
may be noted due to nofmal
produc
lton tolerances.
Waveformsaretakento ground
in service
oscilloscope.
Voltagevariôtions
may be noted dueto
tio
n tolerance_
S : CD signal
path
mooe Dy usrn!]
norma i proouc
Yzav---o
1;.1:'':-*E'
c302
cxP502aH0270
?BnArsa
n PAUST
sÊrR,cH
sroP
iErArn/Ex1€R
aiiF;iiTtS
*,9.L,,"e
Switch
R€f. No, Swilch P6ition
s602
s701
s801
s802
s803
s804
s805
s806
s807
s808
s809
s810
MD pause
LIMITIN
l<<
>>l
REMAIN/ENTÉR
REPEAT 1/ALL
SHUFFLE/RMS
I>/aa
CD HOLDER
OFF
OFF
OFF
UFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
",/)'^""".,
-6-

[Jspeater
@eXOleS fteadphones)
jack
(stereo
minijack)
EPOWERswitcfl
EJOPR/BATT
(operation/battery)
indicator
@fm Sf (FM
sterco)
indicator
@ Diat
scateandpointsl
EIFTNE
TUNtNc
conrrol
Usedforprecise
tuning
of SWstations.
@Tuning
control
pAmo selector
@votume
conrrot
@BALltCe contot
Use
to adjuststereoimaging,
especiallywhenspeakers
are
not symmetrically
placed.
@cneexrc EouALlzER
controts
(for
tistening
onty)
@FUNCT|ON
selector
CD:To listen
to/recordCDsound.
LINElN:To listen
to/recordsoundtromthe equioment
con-
nected
to the LINElN jacks.
RADIO:To listen
to/record
radio
programs.
TAPE:To listen
to taoes.
CD,crorlbdcdr
rreton
@ Cassetteholdsr
ECD displaywindow
ECO operationbuttons
I (stop)
>tl (play/pause)
<</>> (search)
l<</>l (AMS)
@Tapeoperationbuttons
I (stop/eiect)
a (record)
> (playback)
<< (rewind)
>> (fast
forward)
ll (pause)
EICOop"rati* mode
buttons
REMAINTENTER:
To disptay
the remaining
timeod a disc.
or
to program
selections.
REPEAT
I,ALL: To repeatone or all ot the selections.
SHUFFLE/RMS:
To play the selêctions in a random order,or
to program
specific
selections.
@Cotrotoer
ElaeCr hdton
(for
CD)
@AC lN (AC
power
input)
socket
@ fefscopic ar ertna
@t-tl\|e
lN0ine
input)
iacks
(phono
jacks)
@CO OUf1CO
outpur)
jacks
(phono
jacks)
@SPEAKER
teminats
E lSsrFMMODE
(tnterf€r€ncê
Suppress
SwitcfirFM
modeswitcù)
-5-

SERVCIE MODE (service Program)
This set has built-in service program in the micro-
computer asusualsets.
The operation method of service
program is explained
below.
Be sure to setPOWER switch ON,
lf not. key inpu$ can not be operctecl.
REMAIN/ENTER
[ ] : Main operation in service mode
for details. rcfer to step 2.
.(sToP)
fRewrn to the
stand
W mode"l
Landstopthedisplay. l
>II(PLAY/PAUSE)
fFocus servogoes
on andl
Lturn topull-in mode. J
),> (FF
)
f Opticat
pick-upgoes
to1
L outside circumference. J
f Tracking
servoand
sledf
Lservo
goon, )
Be sure to close CD holder.
lf not, key inputs can not be operated.
Fig. 1 Key Positions
<(FR)
fOptical
pick.upgoes
tol
Linside circumference. J
Step1 (Service
ModeSetting
Method)
l. Turn the POWERswitch ON and FUNCTION
switchto CD with the power
cordnot plugged
in
(nopower
applied
to set)
and
press
the
) lf key.
(This is to discharge
C804 connectedto IC801
pin Q) (RSr).)
2. Solder
jumper
TEST
point.
(IC801
pin@ trrsrl is
grounded.)
Plug
inpower
cord.
Thisputs the setinto service
mode.
- CD control board -
Solderjumper for service
mode.
I Aftei chécking or adiusting in service
mode,\
\be sureto remove this solderiumper' /
Fig. 2 TESTPoint Position
'H H00H00
s
\ co I
llt-J - 'L_r-
-6-

Step 2 {Service Mode operation}
l. When servicemode is set, the display will change
6 times (includes âll the segmentslighting and all
turning out), and those 6 changes will be repeated
overand over.
When I key is pressed,
the displaystops.
When I key is released,
the display continues to
change. This allows check of each
segment.
The following operation can not be performed if
the CD holder is not shut.
2. When I key is pressed
on each mode, return to
thestepl.
3. When
}) or li{ key is pressed, the optical pick-
up block moves to the inside or outside circum-
ference. Tracking servoand sledservo
go off when
this is done, so press REMAIN/ENTER key to
turn on the tracking servo if necessary.
4. When
)ll key is pressed,CLV-S (pull-in mode)
starts while performing focus search. When there
is no disc installed,focus search isrepeated
several
times while discmotor is rotating.
5. When REMAINi ENTER key is pressed,
tracking
servo,sledservoand CLV-A (servo during PLAY)
go oN.
6. When 4 and 5 are performed, the disc begins to
play.
Step3 (Service Mode release)
l. First be sure to unplug the power cord then
removethe TEST point solder
jumper.
(During servicemode, C804 is discharged
by un-
plugging the power cord. Therefore, microcom-
puter ICS0l is reset
by next plugging in the power
cord.)
2. The setwill now operatednormally.
NOTES ON LASER DIODE EMISSION CHECK
The laserbeam on this model is concentrated soasto
be focused on the disc reflective surface by the
objective lens
in the optical pick-up block. Therefore,
when checking the laser diode emission. observe.
from more than 30 cm away from the objectivelens.
Laser Diode Check Procedu
re
The laser diode on this set will not emit unlessthe
CD holder is closedand S8l0 (leaf SWtype) is turned
on. The laser diode will always emit even if focus
searchisnot performed in servicemode.
Procedure:
Checkthe laserdiode emission
with the eve.
l. Openupper
panel.
2. S8l0 on as Fig.
3.
(In servicemode, this operation is not necessa-
rv.)
3. Press the
)ll key.
(ln servicemode,
thisoperation
is
nothecessa-
ry.)
4. Observe
the objectivelensand
confirm
thatthe
laserdiode
is
emitting
light. If it does
not,APC
circuit
or optical
pick-up
blockisdefective.
SetS8l0 going
on
with a thin screwdriver.
Fig. 3 Turning 5810 on
o
-7

1.1. RADIO/RECORDERSECTION
!l
l6 {Li{l
Ie
sEcTloN
1
BLOCK
DIAGRAMS
s303'2
lïuvoîËl
1
M0N0 _e
ID502
14
MWoSC
SI
lBÂNoil
t
I
I
SW
RV2
IFmr-t
ITUNINGI
I7
rlz SW
ANT
9ie
s30r5
l
I
2
FV3O6 RV3O7
I
I
I
HRP6OI
REClPB
HEÀD
lEÀL-ANcÈlltoL
uvE
s302-3
( s':0,
fl sr:oz
\
o
o
J302
lFIo
NÈal
s30r
RECORD,/PLAYBACK
PLAYBACK
t
RECORD
s302
FUN-r
ro-Nl
CD
I
L
INE
I
RAD
O
I
-e <Ja
s:o:.tffi 1
',, I SI
EanDl
T]\r
ta
(Po0e
10)
T0 D502
- R_CH -
SÂMEAS L_CH
FM SECT ON
AM SECT ON
RAD O,TAPE SECT ON
s60l
TÀPE
POivER
POWER
AMPSECTION D501
IôPR,€Àin
r,3,5,7,9
l90l
PowER lll cHsor
ilE--n ÀrN
ill_+li{
DRY
BAÏT.
s zE -c-
(IEC
DESGNATION
8PCS,
I2V RIlN
I
-8-

cFD-444L
1-2. CD SECTION
OPTICAL
PICK-UP
BLOCK
KSS-1508
I6KB
T F
tc6a2
l-8, 1
!ETECTOR
f.
LASER
O
lODE
-I
',
ri
FOCUS
c0r
M7A2
SPNDLE
MOTOR
DBO
I
'DBO8
EFM
ASY
D
IGITALS
IGNALP
vc00
vc0
|
PDO
CN
N
>>>[:
OowÈ
x,r,.
:=:
FOCUS/TRÀCK
NG
Cl] L DR
IVE
SLED,/SP
NDLE
MOTOR
DR VE
s70l
LIM
T
CLOCK
LATCH
DAT
A
RESET
SENSE
M70l
StED
MOTOR
S GNAL
PROCESSOR,
LASER
ONC RCU
IT'
M
IDPONT VOLTÀGE
GENERATER
1C701
PD]
9- , l3-l7
29
32,3L-37
AUIOMAT
C
POWÉR
CONTROL
FOCUS/lRACK
ING/SLEDl
CLVlPLL SERVO
1C742
SLO i./DP
MON
FSW
SPDL
SW
TCHING
I
c107
-9-

CE
OE
WE
t2,2
DRESS
8
:ss0R.
cLv
03
0
SERV
O
DA1A
e21o
f
;ËF
FOK
SUBO
sc0R
C
RCF
WFCK
GFS SYSTEMCONTROL
Ic80r
CLOCK
LATCH
DATA
SE
NSE
RESE
T
FF
SEARCH
REMA]N,/ENTÊR
SHUFFLETÈMs
o-a5
I l.SMHr
-o 'q
(TEST)
''
0B0l
StJITCHING
TEST
START
FE,/PIUSE
SrnF
CLOCK
LATCH
DATA
SENSE
RESET MDPAUSE
5V
D/A
CONVERTER
1c705
LOUT
DATA
BCLK
SCLK 0705
_cH sv/tlcH NG
x701
16.
9344
N2
MUT
INô SW I
TCH
8709,71A
s30r-7
RECORD,/PLAYBÂCK
PLAYBACK
I
RE
CORD
s809
E
s808
E
s8r0
CDHOLDER
s902
MDPAUSE
-10-
/ sYslEM \
I C0NTRoL I
\
sEcT
|0N/

sEcTroN
2
DISASSEMBLY
Noto: Follow the disassembly
procedure
in the numerical
order given.
FRONT
CABINET
REMOVAL
x 14
CASSETTE HOLDER
O-O:cassetteholder
O - (D r cD hotder
AND CD HOLDER
REMOVAL
CD BLOCKREMOVAL
VTPS
\
q
@ Remove the bossby
pushing in the arrow
direction.
'/ Gl cDcove,
Q Re-one the bolsby
lD arpz.d , 6 e::!1i!.s in the arrow
dircction.
@ small damper
?-urrr"",,
direction-
CD holder
up spring.
@ Remove
the boss
by
pushing in theaûow
@ nemoréthe boss
by
pushing in the arrow
direction.
@
evresx ta
CDblock
\.-
\ -)r<.
:lt
-1 1-

MECHANISM
DECK REMOVAL
OGEo boatd
@
eres
x to
POTNTER
RACK SETTING
@ Turntnetuning
drum
fuIIv cou
nte
rc
I
oc
Kwt
se'
MAIN BOARD REMOVAL
Oerps
, to
lS tnstatt
the
Pointer
rcck.
pointer rack
Q) lnstatt the TU chassis.
@ set the
pointer rack@ as
shown in figure.
REC sw lever
.h
BVTP3
x 1O
O telescopicantenna
_o
Y 83x 1O
6 Tig;ên the
screw
IBVTP3
x 1d
pointerrack

cFD-444L
SECTION
3
ADJUSTMENTS
3-1. MECHANICAL
ADJUSTMENTS
PRECAUTION
t. Clean the following Parts
alcohol-moistened
swab:
record
/plaYback
head
erase
head
caPstan
2. Dema.gnetize
the record/playback head with a
head demagnetizer. (Do not bring the head de-
magnetizer
closeto the erase
head )
3. Do not use a magnetized screwdriver for the
adjustments.
4. After the adjustments,
apply suitable
locking com-
pound to the Parts
adjusted.
Torque Measurement
with a denatured-
pinch roller
rubber belts
idlers
TapePath Adiustment
When the mode is playback (FWD, REV), run a
mi.rror cassette, then turn adjustment screw to
eliminate tape curl and tape twist at tape guide on
erasehead
andrecord/playback
head.
Adjust the height by using head shim if needed.
Standard
t = 0.1
PartCods t
3-5
78-138-01 0.1
3-578-138-1
I0.2
3-578-1
38-21 0.3
adjustment shim
Torque Torqug metal Meter reading
FWD cQ-102C 25to 55
g'cm
(0.35
to 0.?6
oz'inch)
FWD
Back
Tension CQ{ O2C 2.5
to5.5
g'cm
(0.04
to 0.07
oz'inch)
REV cQ-102R8 25to 55
g'cm
(0.35
to 0.76
oz'inch)
REV
Back
Tension cQl02RB 2.2to5.5
g.cm
(0.04
to 0.07
oz'inch)
FF cQ-2018 100
to 180
g'cm
(1.39
to2.5oz
inch)
REW cQ-201B 95
to 145
g
cm
(1.33
to2.01
oz'inch)
-13-

cFD-444L
3-2. ELECTRICAL
ADJUSTMENTS
MW/LW
SECTION
FUNCTION: RADIO
BAND: MW
oTLW
AM rf signal
generatof
Put the lead-wire
anùennaclose to
tne set.
30oÂampl itude modulation
by 4O0 Hz signal
Output level: aslow as
possible
. Repeat the procedures in each adjustment
several times, and the frequency coverage and
tracking adjustments should be finally done by
the trimmer capacitors
PHONES
MW TRACKINGATUUSTMENT MW FREOUENCY
COVERAGE
ADJUSTMENT MW IF ALIGNMÊNT
Adjust for amaximum
reading
on
VTVM. Adjustfor amaximum
reading
ONVTVM.
Adjustfor amaximum
reading
onVTVM.
620kHz I 1,400kHz 455kHz
L3 | CT1-3 1.650
kHz | 525kHz T2
crl-4 | T4
InMAIN BOARDI
16/,@ rYr
l';El
-f|-
IS LJ ,/
-t(ât tErt I I E qpl
L3 cT2 cT4 | T5
160kHz | 260
kHz 295kHz | 145
kHz
Adjustfor amaximum
reading
onVTVM. Adjust for a maximum reading
on VTVM.
LW TRACKING
ADJUSTMENT LW FREOUENCY
COVERAGE
ADJUSTMENT
-14-