Sony CFS-W435S User manual

CFS-W435S_
SERVICE MANUAL
E Model
East European Model
MF-W435
SPECIFICATIONS
Frequency range
Saudi Arabia model
FM: 87.6- 107 MHz
MW: 530~ 1,605 kHz
SWI: 2.3~7 MHz
SW2: 7-22 MHz
E, United Arab Emirates model
FM: 87.6- 108 MHz
MW: 530- 1,605 kHz
SWI: 2.3-7 MHz
SW2: 7- 22 MHz
East European model
FM: 87.6- 107 MHz
MW: 531- 1,602 kHz
SWI: 2.3-7 MHz
SW2: 7-22 MHz
Aerials
FM/SW: Telescopic
Mw: Built-in ferrite bar
Recording system
4-track, 2-channel stereo
Frequency response
80- 8,000 Hz
Speakers
Two way
Approx. 10 cm dia. woofer X 2
Approx. 2 cm dia. tweeter X 2
Output
Headphones jack (stereo minijack) (1)
for 8- 300 ohm impedance
headphones
Maximum power output
5 W (2.5 W+2.5 W)
Power requirements
East European model
220-230 V AC, 50 Hz
Other model
110~- 120/220- 240 V AC, 50/60 Hz
selectable
9 V DC, six R20 (size D) batteries
Power consumption
14 W in AC operation
Batteriy life
Batteriy ; FM recording
Sony SUM-1 (NS) Approx. 8.5 hours
Sony AMI (N) alkaline Approx. 24 hours
Dimensions
Approx. 680 X 216 X 188 mm (w/h/d)
incl. projecting parts and controls, not
incl. handle
Mass
Approx. 5.8 kg incl. batteries
Accessory supplied
Mains lead (1)
Design and specifications are subject to change
without notice.
RADIO
CASSETTE-CORDER
SONY.

TABLE OF CONTENTS
Section Title Page
Specifications ---:-: eee cece teen nec en erences 1
1. GENERAL
Location and Function of Controls -----+-----+- 3
2. DISASSEMBLY --------:+-- eee: er bees 4
3. ADJUSTMENTS
3-1. Mechanical Adjustments -+---++++++eeeeees 6
3-2. Electrical Adjustments .
Tape Section Ce SD res 6
Tuner Section ee a 7
4. DIAGRAMS
4-1. Block Diagram +++: ++see errr eee eee cease 10
4-2. Printed Wiring Boards --+-++++++++++sees ee. 12
4-3, Schematic Diagram a a er ae a ar a ar a a 15
5. . EXPLODED VIEWS «------sceeee teeters 20
6. ELECTRICAL PARTS LIST ..-.--------: 27
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK A OR DOTTED
LINE WITH MARK A ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST. ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.

SECTION 1
GENERAL
LOCATION AND FUNCTION OF CONTROLS
4-BAND GRAPHIC EQUALIZER controls
FUNCTION selector
Telescopic antenna
BASS BOOST control
BAND selector
OPR/BATT indicator FINE TUNING knob
$4 SONY
SPEAKER terminals (rear) 7 soon wor . ne TUNING knob
PHONES jack VOLTAGE selector (rear)
Microphone VOLUME knob
AC IN jack (rear)
Cassette holder A ————_ n° = = Cassette holder B
Tape
operation
button
Tape
operation
buttons
(DECK
A)
(DECK
B)

SECTION 2
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
Remove rear cabinet ass'y by
removing
5
screws
+P3
x
25
AUDIO
BOARD
MD
ASS’Y
©
+BVTP3
x
8
@
+BVTP3
x6
Ge +BVTP3 X 8
ie
oa
LED
board
@ +BVTP3 x 10
@® audio board
@ GEQ holder board —"QV
L
© +BVTP3 x 8
@ GEQ holder
board
CASSETTE HOLDER ASS’Y aw
@ +BVTP3 x 10
, cassette holder @ damper
@ Press claw. .
St
“S
. recision
©
Slide
up
ccrewdtivél
cassette
lid.
[|
or
equivalent
SoA casstte spring
—4—

TUNER BOARD ASS’Y VOL BOARD
© +BVTP3 x 8 = @ Press knob (VOL)
with screwdriver.
© +BVTP3 X 10
@+BVTP3 X 12
@ connector from CNP304
on the audio board
tuner board ass'y
® band knob
A
Na |
as
L
knob
(VOL)
oO
@ +BVTP3 x 10
{
@ knob (FINE TUNE)
POINTER SETTING
scratched
line
©
Adjust
the
pointer
to
emai
+PTPWH3
X
8
: the scratched line on
pointer \ the chassis (tuning).
af @ tuning knob
@® Turn the tuning
cap drum fully in
the arrow direction.
chassis (tuning)
chassis (tuning)
@
tuner
board
é
OA
i!
@ Slide the printer to
the chassis (tuning).
chassis (tuning)

SECTION 3
ADJUSTMENTS
3-1. MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened swab:
record/playback head pinch roller
erase head rubber belts
capstan idlers
2. Demagnetize the record/playback head with a head demagentizer.
(Do not bring the head demagnetizer close to the erase head.)
3. Do not use a magnetized screwdriver for the adjustments. °
4. After the adjustments, apply suitable locking compound to the parts
adjusted. —
5. The adjustments should be performed with the rated power supply
voltage unless otherwise noted.
Torque Measurement
Playback
CQ-102C
nos
CQ-102C
CQ-201B
Tape Tension Measurement
1.5 — 5.5 gecm
Back
tension
(0.021
—
0.076
ozeinch)
Deck-A: More than 80g*cm
(More than 1.12 ozeinch)
Deck-B: More than 5Sgecm
(More than 0.76 ozeinch)
Rewind
Fast foward
|
Tension Meter Meter Reading
CQ-403A more than 100 g (3.53 0z)
:
3-2. ELECTRICAL ADJUSTMENTS
TAPE SECTION
1. The adjustments should be performed in the order given in the service
manual. (As a general rule. Playback circuit adjustment should be
completed before performing recording circuit adjustment.)
2. The adjustments should be performed for both L-ch and R-ch unless
otherwise indicated.
@ Switch position
FUNCTION 5:4 340408 sasaetawinreaee ws TAPE (RADIO OFF)
GRAPHIC EQUALIZER «+ +++srserererecssersseens center click
BALANCE cs 0ciw eon atraeewanwhen eran iaek anaes center click
VOLUME sate ia eed nar cea adaaenetates > mechanical center
BASS BOOST -rrrcsterereeeees ttteees «+++ mechanical center
e Standard input level
Input level 3.085 mV ( — 48 dB)
e Standard output level
Output level 0.775 V (0 dB) | 0.25 V(— 10 dB)
e Test Tape
[Type | Signal Weed tor
_ P-4-A063 6.3 kHz, — 10 dB | azimuth speed adjustment
0 dB=0.775 V
Record/Playback Head Azimuth Adjustment
Procedure:
1. Mode: playback
test tape
P-4-A063
(6.3 kHz, — 10 dB)
PHONES jack

2. Turn the adjustment screw for the maximum output levels. If these
levels do not match, turn the adjustment screw until both of output
levels match together within 1 dB.
position L-CH R-CH angle
3. Phase Check
Mode: playback
test tape
P-4-A063
(6.3 kHz, — 10 dB)
L-CH
oscilloscope
PHONES jack
Screen pattern
inphase 45° 90° 135° 180°
re erreyenenctermerreereed — \emenenrnreypeennnnsna
good wrong
4. After the adjustment, lock the screws with locking compound.
Adjustment Location:
e First remove cassette lids.
Deck A
screw driver
Press
“>” button.
Tape Speed Adjustment
Setting:
Mode: playback
Procedure:
speed checker
LFM-30
or
digital frequency
counter
test tape |
WS-48B
(3 kHz, 0 dB)
ic Tet ke
PHONES jack
Adjustment Values:
Adjustment part | Speed checker | Digital frequency counter
RV303 2,970 to 3,000 Hz
Frequency difference between the beginning and the end of the tape
should be within 1.5% (45 Hz). ‘
Note: On high speed, Adjustment is not reguired.
Adjustment Location: Audio board
TUNER SECTION
[FM]
FM RF SSG
0.01
uF
telescopic
antenna
22.5
kHz
frequency
deviation
Na)
by 400 Hz signal.
output level: as low as possible
Mw]
AM RF SSG
Put the lead-wire
Ww antenna close to
the set.
aed
30% amplitude modulation by
400 Hz signal
output level: as low as possible

[SW]
SW2 FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on VTVM.
FINE TUNE ee Mechanical center
_ 6.8MHz
AM RF SSG ee
SW2 TRACKING ADJUSTMENT
12PF telescopic iz Adjust for a maximum reading on VTVM. :
relate : 6.8 MHz
30% amplitude modulation by OND)
400 Hz signal.
Output level :as low as possible
VTVM VCO Adjustment
Procedure:
telescopic
antenna
- FMRF SSG terminal .
(CN2)
PHONES jack
@ Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally done
by the trimmer capacitors. Carrier frequency: 98 MHz
Modulation: no modulation
Output level: 0.032 V (90 dB)
1. Connect frequency counter to @ and @ pins of IC1 as shown the
figure below.
2. Tune the set to 98 MHz.
3. Adjust RV1 for 76 kHz + 500 Hz reading on the frequency counter.
FM IF ADJUSTMENT
, Adjust for a maximum reading on VTVM.
T7 ‘10.7 MHz
FM FREQUENCY COVERAGE ADJUSTMENT
‘i Adjust for a maximum reading on VTVM.
@ ( ): Saudi Arabia model { ]: East European model
frequency counter
86.5 MHz (87.35 MHz) [64 MHz}
tuF jC _]
TC2 109.5 MHz (107.8 MHz) [109.5 MHz] .
per 109 5 Mie 107.8 wire) (102 My]
AM IF ADJUSTMENT
Adjust for a maximum reading on VT VM.
T6 455 kHz
MW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on VTVM.
520 kHz
TC4 1680 kHz
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on VTVM.
620 kHz
TC3 1400 kHz
SW1 TRACKING ADJUSTMENT |
Adjust for a maximum reading on VTVM.

- @ Adjusting Location
Mw
[TUNER BOARD] : TRACKING
— Component Side — noe FMIF FMVCO
ANT1—-TC3 . 17 RVI
AM IF T6
CT1 SW1
Ve FREQUENCY
FM L2 T3 COVERAGE
FREQUENCY :
COVERAGE \ Tc2
Telescopic
antenna CN2
terminal “
FM TC1
TRACKING a
T4 SW2 :
FREQUENCY
CT2
TS MW
FREQUENCY
TC4 COVERAGE
T1 T2
Swi Sw2
TRACKING TRACKING
{AUDIO BOARD] — Component Side —
O
RV303
TAPE SPEED
| tor ¢
COVERAGE |. —

SECTION 4
DIAGRAMS
4-1. BLOCK DIAGRAM
ANT2
FM/SW
TELESCOPIC |
ANTENNA
REG OUT tc1
FRONT END/AM, FM LF /MPX
$403
OECK B
(PB)
$401
DECK A
(PB)
$402
DECK B
(POWER)
$404
OECK A
(POWER)
1 SWI OSC
<> SW ANT
% JL
S1-5 S1-1
T2 > T4
4 > SW2 ANT Sw2 OSC
| <I { ANT1
Tes MW ANT
qd
“ = =
DECK-A [AUDIO BOARD)
HP601
PB, CNPS01
cH <3 > => —
m2
>
>
os
OECK~B
CNP3502
HRP6O1
REC/PB
a =
Se a > “
CH
ee ap
= CNP3O3
CNP303 (272)
(172)
: Ava Ba
HEG6OT
ERASE ae eaiee |
a (REC/PB) i O O
PB +6V
$301-5 { ie
<2 © oO
gee Py Ed
«a (REC SW BOARD]
(€201
PRE AMP
{TUNER
cy,
=?
BAND
MUTING
SwWwiTCH
Q3
‘CFS-W435S
BOARD) Rv301
AN ~, e SIGNAL PATH
c 1
-— [eeabuie Fount zen ]— és aa
BASS ;
(avn lesa |Gne same ieee VOLUME >> :PB DECK~-A
{
ae BOARD [> :PB DECK-B
Pape Bt . C>: REC DECK-B
avsoz ! :
t [vorume ]
1
E>
GRAPHIC
;
EQUALIZER
(C203
EXz
CNP304
Ny
AMP.
1¢202
POWER AMP
J301
(e SP101
R SP201
SWITCH
Q300, 505
Sy
CN1
Lo? |
NOR/ZHIGH
SWITCH
Q308
DUBBING
SWITCH
Q3506, 509
st
\)
$3502
FUNCTION
TAPE
RADIO OFF
{
DUBBING
NORM
1
DUBBIMG
HIGH
{
RADIO
+6V REG
@3504
=10=
RV305
SPEED
CONTROL
Q307
CNPSOS
(272)
+
M901
REEL/CAPSTAN
[oo 9 ¢ |
220-240Vv
t
110-120V
CNVB01
AC IN~
T901
POWER
TRANSFORMER
D901-304 CNPBO1
ORY BATTERY
SIZE 7O"
(IEC DESIGNATION LR20)
GPCSx1.5V OV
BATTERY
BOARD
D503
OPR/BATT
{LED BOARD) |
Oa
ECM301
€2-3, fae]