Sony CFD-770L User manual

cFIl-710
1
SERUICE
MANUAT AEP Model
UK Model
MreABl$S
Model
NameUsing
Similar
Mechanism CDSection cFD-7501t60L
Tape
Section NEW
ODtical
Device
Name KSM-21OBAN
TapeTransport
Mechanism
Type DECKA:MF-770P8-65
DECKB:MF.77ORP.65
oSPECIFICATIONS
Spindlespeed
Errorcorreclion
CO
pla!/er
section
Syslem Compactdiscdigitalaudiosystem
Lâserdiode
properties
Radio
section
Frequency
range
IF FM MWLW
lo.7 MHz 450 kHz
Antennas FM: Telescopic
anlenna,Extemal
ant€nna
MWLW: Builtin ferritebarantenna
Taperecorder section and general
Recordingsystem 4-track2-channel stereo
Fastwinding
time Approx.140 sec.with SonycassetleC-60
Frequency
response . TYPE | (NORMAL)
cassette:60-13,000
Hz
. TYPE ll (CrO2)
cassette:60
- 16,000Hz
Sæaker TwGwayspeakers:Wooter:10cm dia, cons
Po^,eroulput type,Tweeter:
5 cm
Two-wayspeakers:10W + 10W (at4
ohms,315Hz,100/oharmonicdislortion)
- Continuedonnext
page
-
Material:
GaAlAs
Wavelength78Onm
Emission
duration:Continuous
Lâser
outout: Lessthan 44.6aW'
'This outputis the valuemeasuredat a
distanceof about
200 mm lrom the
objectivelenssurlaceon the optical
pick-up
block.
2oo r.p.m.to 5Oorp.m. (CLu
SonySuperStrategyCrossInterleave Bead
SolomonCode
Numbsrol channels 2
Frequency
response 20
- 2o,oooHzll dB
Wolvandtlutter Belowmeasurable
limit
Dolby noise reduction manufactured under license from
Oolbv Laboralories
Licensing
Corporatic
n.
"DOLBY" and the double-DsYmbol
00 are
trademarks
o{
Dolbv LaboratoriesLicensing
Corporation.
CD
RADIO
CASSETTE.CORDER
FM LW
AEP,UK
Model 87.4-t
07
MHz 531-1602
kHz
(9kHz
STEP)
r53-279
kHz
Italian
Model 87.5-108
MHz
SONY

NEF.VOLIAGE
fq'*'*'p;11
I
J REL^Y | |
,*ri,
lB 8oARD|
|
EN!
- ;- | cN606
I Tc suB I

cFD-770L
Inpuls Mixing
microphoneinput
jack
(minijack)
Sensitivity2.5mV
Forlow impedance
microphone
Outputs Headphones
jack (steroo
minijackl
For
16-68 ohmsimpedance
headphones
TwoCD outputjacks(phono
jack)
Loadimpedance10
kilohms-orhigher
Raledoutput0.98V rms at loadimpedance
47 kitohms
Maximumpower
output
10w+10w
Powerrequirements DC 12V,I R20(size
D) batteriesfor CD
radio
casselte-corder
DC ô V 4 RO
(size
AA)battêries
for
clock imer/memorv
AEP,ltalianmodel 220V AC,50Hz
UKmodel 240V AC,
50Hz
Model ldontitication
MODEL
NO,CFD-7701
CD RADIO
CASSETTE-CORDER
Powerconsumption
AEP,ltalian
model 45W
UKmodel 80w
Batterylife Batterieslor radiocassette-corder
Becording Playbâck CDplaying
SonySUM-I(NS) approx.2 H approx.0.5H approx.
0.5H
SonyAlkalineAMI (N) approx.5.5H approx.1.5H approx.1 H
Forclock/timer/memory:
Approx.1 year
Dimensions
Weight
686
x250 x 234 mm (Wh/d)
(271lgx 97/s x 91/.inshss)
incl.poecting partsand controls
Apprrox.11kg incl.batleries
(Approx.
24 lb 4 oz)
SuppliedaccessoriesAC power
cord (1)
Remote
commander
(1)
Designand specifications
subjectlo changewithoutnotice.
CLASS I LASERPROOUCT
LUOKAN 1 LASERLAITE
KLASS1 LASEFAPPARAT
ThisCompaclDiscplayer is
classifiedas a CLASS1
LASER
product.
The CLASS1 LASER
PRODUCTlabelis localed
on the rearexterior.
I
I
3-362-604-01:UKmodel
3-362-605-01:ltalian model
3-363-102-01:
AEPmodel
SAFETY-RELATED COMPONENT WARNING!
!
coMPoNENTS tDENTtFtEDBy MARK l\ On OOrreo
L|NEW|THMARK a ONTHE
SCHEMATTC
DtacRAMS
AND IN THE PARTS
LIST ARE CRITICAL
TO SAFE
OPERATION. REPLACETHESECOMPONENTS
WITH
SONY PARTS WHOSEPART NUMAERS
APPEAR AS
SHOWNIN THIS MANUAL OR IN SUPPLEMENÎS
PUB.
LISHEDBY SONY.
-2-

cFD-7701
Section Title
Specifications
Model
ldentification
" "
1. SERVIC]NG
NOTES .
2. GENERAL
Parts
ldentification
" "'
Setting
the
Clock
Playing
Discs
VariousDisc
PlaYing
Modes
Using
theBuilt-in
Timer
3. MECHANISM
OPERATION
TABLE OF CONTENTS
Page
I
2
3
5
7
8
9
l0
12
sEcTloN
1
SERVICING
NOTES
Section Title Pege
6. DIAGRAMS
6-1. MainBlockPrinted
Wiring Boards " " " " ' 33
6-2. Main
BlockSchematic
Diagram " """ " 35
6-3. TC BlockSchematic
Diagram " ' " " "' 40
6-4. TC Block
Printed
WiringBoards ' "'''"" 45
6-5. CD
Control
Printed
WiringBoards
"''" "'47
6-6. CDControl
Schematic
Diagram
' "'""''" 49
6-7. Power
BlockSchematic
Diagram
" .'""" 53
6-8. Power
Block Printed
wiring Boards " " " " 57
7. EXPLODEDVIEWS. """""59
8. ELECTRICAL
PARTS
LIST .......,.." 66
4. DISASSEMBLY """" 16
5. ADJUSTMENTS
MechanicalAdjustment """""' 20
ElectricalAdjustment "'""""' 2l
Tape
Recorder
Section
.' """"" 21
Tuner
Section """""'24
CD
Section """""" 26
)-1.
NOTESON HANDLINGÏHE OPTICAL
PICK.
UPBLOCKOR BASE
UNIT
The laser diode in the optical pick-up block may
suffer electrostatic
breakdown
becauseof the poten-
tial difference
generated
by the chargedelectrostatic
load,
etc.on clothingandthehuman body.
During repair, pay attention to electrostatic
break-
down and also use the procedure in the printed
matterwhichisincluded
in therepair
parts.
The flexible board is easily damaged and should be
handled
with care.
NOTES ON LASER DIODE EMISSIONCHECK
The laser beam on this model is concentrated so
as to be focusedon the discreflectivesurfaceby the
objective lens in the optical pick-up block. There-
fore, when checkingthelaser
diodeemission,
observe
more than 25cm away
from the objectivelens.

cFD-7701
CHUCKPLATE
JIG ON REPAIRING
Onrepairing
CDsection,
playing
adiscwithout
the
CDlid,
use
ChuckPlate
Jig.
o CodenumberofChuckPlate
Jig:X-4918-255-l
NOTE ON REPAIRING
The spindle motor (M703) and the tumtable assembly
individually supplied
asrepairparts.
When repairingM703, please
order the tumtable assembly
together,
Dimension is asfollows.
19.4! 0.1
mm
spindle
motot(M7O3)
LASERDIODE
AND FOCUS
SEARCTI
OPERATION
CHECK
l. Make
Function
switchto CDposition
withnodisc
inserted.
2. Open the
lidforCD.
3. Tumon
S80lasfollowing
figure.
4. Prcss
) key.
5. Confirmthelaser
diodeemission
whileobserving
the
objecting
lens.Whenthere
isnoemission,
AutoPower
ControlcircuitorOpticalPick-up
isbroken.
Objectivelens
movesupand
down
oncefor thefocus
serarch.
"/'- ^>
lnsen
screwd vet and Push
5801.
!
il
laset
diode

cFD-7701
This section is extracted from
instruction manual. SECTION
2
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-1 1-

cFD-770L SECTION3
MECHANISM
OPERATION
MECHANISM
OPERATION
Modes
are
changed
bythat
"solenoid
plunger"triggers
"gear
cam"
torotate
insynchronizing
withflywheel
(N)'
Main
mechanical
part
names
areshown
inthe
followings
precedenllytomechanism
operation.
IMotor)
I
motordc (reel) pc boardrelay
(Cassettel
lever (R) P
sWing
torsion
base
head
spring (brcke) totsion
platesw retum
gear(reel)(T) gear
(rcel)(S)
-'t2-

t
Operatlons
otthe
modes
âre
asfollows:
t. Operatlon
ofthe
cam
gear
Perspective
viewed
fromcassette
Operatlons are performed as tollows;
l. Powcr
issupplied
to "solenoid
plunger".
2. "l-nver PL" movesin thedircction of arrrow.
3. "Gear
cam"istumed
by"spring(cam)
tosion".
4. "Gear
cam"is aligned
with "flywhcel(N) gear"
sothat
,,gear
cam"isturned.
(Approx.
0.5seconds/l
tum)
2. FWDmode
(l) Power
is supplicd
to "moror
turned
by
"belt
(capstan)". capstan" and "flywheel" is
flwheel (N) flywheel (R)
(2) Power is suppliedto "selenoid
plunger", ..gear
cam', is
tumed,
â headisswitched
to NOR modc,
anda headbase
is
moved
forward.
Perspective viewed from cassefle
geat cam leverPL
I
slider
(NR2)
"Lever
N" is tumd
counterclockwise
by,,gear
cam"
andis
locked
at
"level
PL".
Rotation(counterclockwise)
of "lever N" is synchronized
with
sliding
of "slidcr
(NR2)".
When
"slidcr
(NR2)"
isstid
rightward,
modeof a head
is switched
from REV to NOR.
Simultancously"lever
PL" ispressed
toacapstan.
cFD-770L
geat cam solenoid
Ptunger
el) I
direclion
ol drive
levet PL
flyvheel (N)gear
STOP
* FwO
TIMING
CHART
< INPUT
< LED
CM
PL
RM-H
LINE MUTE
' i K.yin i!
iK.r,in i! r.c.iwd- |(.v.in i! iôhibitcd. i onrbtêd.
molor capstan
ON/OFF
signal
plungerON/OFF
signal
reelmolorQN/OFFsignal
-F:FWDdircction
- R: REVdhection
rcelmotordrive
voltage
switching
signal
- H: NOR
-L:High
-13-

cFD-770L t
(3) "Basehead"ismovedfoward
and
the
break
isdetachedfrom
thcreellable.
"Motor dc(reel)"
isdrivencounterclockwise
and
thereeltable
(T) is tumedby "gear
driveng".
"Læver
PL" ispressed
tothc
capstan.
"Base
head"is movcd forwardby "springtorsion"
of link
(limiter)
in synchronizing
with rotating of "gear cam".
"Gear
camc" is tumedandis lockedby "lever PU'.
FwD modeswitchingis
completed.
basehead
lockedPorlion
link (lîmiter) leverPL
Ê- geat cdm
3. REVmode
Dlfferences
fromFwD mode
Suction time of "solenoid plunger" is long, "lever N" is not
lockedby "lever PL", andaheadisset
to REV mode.The slider
(NRZ) is setto REV modeand "lever PL (R)" is pressed
to a
capstan.
"Lævcr
N" isturnedby "gear
cam".
However,
"lever
PL"
is not lockedandis set-backto previousposition
because
"lever
PL" issuckedby"solenoid
plunger"
"Motor reel"isdriven clockwisein REV mode.
(4)
(s)
STOP + REV
TIMING CHARÎ
> INPUT
> LEO
CM
PL
RM
-R
RM
-H
LINEMUTE
rcel table
(S) reeltable
(T)
base
head
\9 o
geat drive capstan
@
1leverPL(N)
slidet(NR2)
(attached
bsneath
"base
head')
Persoective
viewedfrcm cassette
solenoid
plungel
- slidet (Nn2)
gearcam â
\ ./,,-
/, ./o
\\
-14

cFD-770L
POWER BLOCK REMOVAL
@ powerblock
MD BLOCKREMOVAL
O prcss
theejeêtbuttons
ofA andB decks.
Q spring
O screws
(BTP3 x 10)
Q screws
(BVTP3 x 10)
6 TumMDblock
andTCboard 180
-
@ flatcable
@ screws
(BVTP3
x 10)
screws
(BVTP3x 10)
SERVICE
POSITION
FOR MD BLOCK
<+8\<
'Jft._,.:;
ffi
);
Q scrcws
(BTP3 x 10)
TCboad
\'
scrcws
(BVTP3
x 10)
>
Z\I A
ll ----r\\;t)
I r{\\
f2IH'dtir
"i tgl-t5
l v\1
i Éi- '-l/
ri+ \ il,_+
I tr\rt{,rlL
I |\') -r<
.l--\l
\l14
t ta Il-/
'(- -.€1?
TCboard
-17
-

cFD-7701
CAPSTAN MOTORANO REEL MOTOR REMOVAL
OPTICAL PICK.UPBLOCK REMOVAL
BLOCK
AND PINCH
LEVER
REMOVAL
O claw
scrcws(P2 x 1)
damper
(blue)
dampet
(brcwn)
a.\
_-.:\_
,
Sz
HEAD
rcelmotot
@ pinchrcvet (FWD)
@ pinch
rcver
(REV)

SERVICE
POSITION
FOR CD MAIN BOARD
'7n
fl'll
l) -''
N
N.NR
rN
)inboad
-19-

sEcTloN
5
ADJUSTMENTS
5-1. MECHANICAL
ADJUSTMENT
TAPE RECORDER SECTION
PRECAUTION
l. Cleanthefollowing parts
with adenatured-alchohol-moistened
svr'ab:
record/playbackhead pinchrollers
erasehead
capstans rubberbelts
idlers
2. Demagnetize the record/playback/erase
head with a head demag-
neûzer.
3. Do notusea magnetized
screwdriverfor theadjustments.
4. After the adjustments,
apply suitablelocking compound to the parts
adjusted.
5. The adjustmentsshould be performed in the order given in this
seryice
manual.
Torque
Measurement
DECK A, B:
TapeTenslon:
DECK
A,B
Head
HelghtAdlustment I
DÊCK-EI
Adiustmont Proc€duro:
l. Insert
amiror cassetteCQ-009C.
2. Makethe
settoFwD playback
mode.
3. Lrosen
theFWD
tape
guide
fixing
screwandadjust
withinserting
the
adjusting
shimto eliminate
tapecurl
andtapetwistinthe
portions
of
tape
guide
and
head.
4. Make the set to REV tapeguidefixing screwandadjust
with
inserting
theadjusting
shimtoeliminate
tapecurlandtapetwistinthe
portions
oftape
guide
andhead.
5. t osentheREVtape
guide
fixing
screwandadjust
withinserlingthe
adjusting
shimto eliminate
tapecurland
tapetwistinthe
portions
of
tape
guide
andhead.
6. After adjsutment,applysuitablelockingcompound
to the fixing
screws.
Adiustmônt Location:
Mode Torque Meter Meter readlng
FWD cQ-r02c 30
- 55
g.cm
(0.42
- 0.?6oz.inch)
FWDback
tension 1.5
- 5g'ç1
(0.02to 0.06oz.inch)
REV cQ-r02Rc
30
- 55
g.cm
(0.42
- 0.76
oz.inch)
REVback
tension 1.5
- 5
9'ç6
(0.02
to0.06
oz.inch)
FF cQ-201B 150
- 180
g.cm
(2.08
- 2.49
oz'inch)
@\o
Hsadheighladjustingshim
PartNo. T
3-336-274-O1 o.1
3-33ô-274-11 o.2
3-336-274-21 0.3
Tape
guidehelght
adjustlng
shim
Part
No. T
4-932-003-010.1
4-932-603-1
t0.2
-l
Mode Tension
M€tEr Meter reading
FWD cQ-403A morethanl00g
(more
than
1.38oz.inch)
REV
(Deck
B) cQ-403R
-20-

4. FF
(REW)
mode
REW modes)
The head
baseis locked at a set position
by the AMS lever
synchronizedwith "solenoid plunger".
"Motor
capstan"
istumed
off after
"base
head"
islocked.
Voltagc
of "motor rcel"
in FFor REW modeis
6 V.
5. FWD AMSmode
Mechanlsm operatlon
It is changed
from FWD mode
to STOP mode,
,,lever
AMS" is
stopped
in midway of that "base head" is moved forward as
machnism
operation
of FWD mode,
andit is setto FWD, AMS.
andFF/REWmodes.
A position
of ,,Basc
head"isthesame
as
in
FF/REWmode(advanced
by 4 mm than
STOpmode)
.
Difference
from FFÂEW modeis a ruming
dircction
of .,motor
reel",
6. REV AMS (REWFF) mode
Timlng
chart
STOP
-'>
REV
+ AMS.REW/FF
oAll the signals
in REV AMS mode is the sameas those
of
REW mode
except
lhataLED blinks
or lithts
on.
Mechanlsm operation
It ischanged
fromREV modeto STOPmode,,,lever
AMS,'is
stopped
in midway of that "base
head" is moved forward as
mechanism
operation
of REV mode,
andit is setto REV,AMS.
andREWFF modes.
A positionof "Base head" is the sameas in FF/REW mode
(advanced
by4 mm than
STOP
mode).
Difference
from FF/REWmode
isa rumingdirection
of ,,motor
reel".
STOP
+ FF (REW)
ÎIMING CHART
lf (<K) rNPUr
>(<)r-€D
TINE
MUTE
fhêse t||o sleps
trê ,eqetleal unlil ll
Is s:wilched lo olhêt
i .'' -" -'.-" ;i.1;J.",;iti;i.",
F{.viô i! G.iÈ4 (di^ i. hhibit.i. (.rin i3 6.bl.d
r' - -- €----l
rio.j.( troô I rooI r?ôt,2ô
Mechanlsm
operatlon (same
operatlonfor both FFand
FwO - AMS FF (REw)
TIMINôCHARl
>>(<<) INPUr
>(<) LED
PL
RM
-F (R)
RM_H
LINE MUTE
,40 20ois.c 40 2?0ô3.c roOi too, too,
i.:.. -':. F'.c n3?( À3.ciKey.,n,s
r(sy:n is rscaived. Keyrn is rnh,b,têd. ienabred.
o
aDhectionol headisREV.
Dircclion
ollurningof 'mototreel'.
FF : Counlerclockwise
REW : Clockwise
Lenglhby which'basehead"moves
torward. lever AMS
'Base
head"movesI mmlrcm
aoosition
inSTOPmode.
bdse
head
capstan
lever P (R) levet P (N)
I
15-