Sony MEGA BASS CFS-W310L User manual

CFS-W310L
AEP Model
ERVICE
MANUAL
Model Name Using Similar Mechanism
Tape Transport Mechanism Type
SPECIFICATIONS
CFS-W308L
MF-W308-64
Tuner frequency range
AEP,
Germany
|
87.6—107
|
531
—
1,602]
153
—
279
model
MHz
kHz
kHz
Power consumption 14W
Battery life
FM recording Tape playback
Approx. 12 hours Approx. 7 hours
Sony SUM-1 (NS)
Sony
AM1
alkaline
Approx.
14
hours
Approx. 24 hours
Intermediate frequency
Scan step
Antennas
Recording system
Frequency response
Speaker
Input
Output
Maximum power output
Power requirements
MICROFILM
Itali
del
87.5
—
108
531
—
1,602
|
153
—
279
allanimegs
MHz
kHz
kHz
FM: 10.7 MHz
MW/LW/SW: 450 kHz
FM: 50 kHz
MW: 9 kHz
LW: 9 kHz
FM: Telescopic antenna
MW/LW: Built-in ferrite bar antenna
4-track 2-channel stereo
80 -— 10,000Hz
10 cm (4 inches) dia. full rangex2
CD/LINE IN jacks (phono jacks)(2)
Input impedance 50 kilohms
Sensitivity 0.43 V
Headphones jack (stereo minijack)
for 16 — 68 ohm impedance
headphones
5.2 W (2.6 W + 2.6 W)
220 - 230 V AC, 50 Hz
9 V DC, six R20 (size D) batteries
Dimensions Approx. 540x155x148 mm (w/h/d)
(213/4x61/8x57/8 inches)
incl. projecting parts and controls.
not incl. handle
Weight
Approx
3.3
kg
(7
Ib
5
02)
incl.
batteries
Accessory supplied AC power cord (1)
Design
and
specifications
are
subject
to
change
without
notice.
Note
This
appliance
conforms
with
EEC
Directive
87/308/EEC
regarding
interference suppression.
RADIO
CASSETTE-CORDER
ONY.

CFS-W310L
TABLE OF CONTENTS
Section Title Page
Specifications :++-+++++sssceessseesseeeeesceectcesseeesssseessnseseeeeees 1
1. GENERAL
Location of Controls :sti-sesssiesssesescscccsusscesacvaessecesesasaved 3
2. DISASSEMBLY serdeisseeccsScctnecnaatnerecinesesecisdvavadevess 4
3. MECHANICAL ADJUSTMENTS. --------:-cccceceeeeeeeeeeeees 8
4, ELECTRICAL ADJUSTMENTS ---------:s-ceesceeeseeeessees 8
5. DIAGRAMS
Ball Circuit Boards Location POCO CPT RU ee ere eer ll
5-2. Printed Wiring Boards (Audio, Power Section) +++-+++++ 13
5-3. Schematic Diagram (Audio, Power Section)+++++++++++++ 15
5-4. Schematic Diagram (Tuner, Display Section) -++++++++++ 18
5-5. Printed Wiring Boards (Tuner, Display Section):---+-- 21
6. EXPLODED VIEWS ------:::cccccceseeseeceeeeeccceeeneneeeeeees 23
7. ELECTRICAL PARTS LIST --------c:ssssecceeeeseeeceeeeeeees 29
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.

CFS-W310L
SECTION 1
GENERAL
LOCATION OF CONTROLS
NEGA BASS switch
FM MODE/ISS switch
(STEREO, MONO/1, 2)
MIC (microphone)
CD/LINE IN jack
TONE control
OPR/BATT (operation/battery) indicator
MOCIME
Cornel
FUNCTION
selector
(CD/LINE IN, RADIO, DUBBING, TAPE/RADIO OFF)
te P j
HONES
jack
,
SENS
selector
AC IN (AC power
input) jack
Tape
operation
buttons
(deck
B)
Tape
operation
buttons
(deck
A)
BH
PAUSE
Hi
PAUSE
<4
FF
(farst
forward)
<4
‘FF
(farst
forward)
MEMORY buttons — TUNING + buttons
BP
REW
(rewind)
PP
REW
(rewind)
<@
PLAY
(play
back)
BAND
selector
<@
PLAY
(play
back)
@
REC
(record)
(FM/MW/LW)
HIGH
SPEED
DUBBIING
HBA
sToP/EJECT
MA
stop/eJEcT

CFS-W310L |
SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
TELSCOPIC ANTENNA
@ Telescopic antenna
(ANT 1)
Za
OW
@ screw (B3 x 8)
CASSETTE HOLDER
* Parts on the opposite side can also be
removed in the same manner.
@ Two claws

REAR CABINET TUNER BOARD CHASSIS AND DISPLAY BOARD
@ Connector (CNP4)
@ Three claws
@ Flat wire (CN7)
® Connector (CNP25)
(AEP Model)
@ Tuner board ><
/ XS @ Four connectors
(CNP22, 24, 27)
© Three screws
(BVTP 3 x 20) (BVTP 3 x 10)
© Rear cabinet
@ Three screws
@
Seven
screws
(BVTP
3
x
10
@ Battery case lid
MECHANISM DECK BLOCK AND LED BOARD
@ Two screws
AUDIO BOARD a (BVTP 3 x 20)
@ Two knob ————————_»
(VOL/TONE) ae @ Mechanism deck block
MF-W308-64
(
)
@
PC
board
bracket
© Two screws
(BVTP 3 x 20)
®
© Two screws
(BVTP 3 x 10)
(CNP3, 6)
@ Screw (BVTT 3 x 10)
a
|
i
a
eo:
@
Audio
board
~s
:
®
Open
the
two
cassette
@
Connector
we
aw
holders
@
claw
(CNPS5) @ Two connectors
© Flat wire (CNP1, 2)
(CN7)
SSD
® LED board

| CFS-W310L
MOTOR
Motor (M901
®
Display
board
©
Ground
plat
(W)
9
( )
© screw (P2.6 X 5)
@ Two screws
(M2.6 x 2.5)
@ Two claws
@ Hang two belts to the
claw of the chassis.
© Four screws
(P2.6
x
6)
Spring
@ Three screws
(BVTP 3 x 10)
y
@ screw (P2.6 x +6
HEAD BASE AND HEAD
@ REC/PB head (HRP901) (DECK B)
PB head (HP901)(DECK A)
© Two claws
@ Head base
Pinch roller
@
Erase
head
(HE901)
eens
maa
|
\owg
(DECK
B)
|.
@ Two claws
(DECK B )
® Three claws

CFS-W310L |
SECTION 3
MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-
moistened swab :
record/playback head
erase head rubber belts
capstan idlers
2. Demagnetize the record/playback head with a head
demagnetizer. (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.
6. Power supply voltage : 9Vdc
pinch roller
Torque Measurement
Meter Reading
20 — 60g*cm
(0.28 — 0.83 ozeinch)
Forward
CQ-102C
2 — 6g¢cm
Forward
ea (0.028 — 0.083 ozsinch)
more than 45gecm
aa (more than 0.62 ozeinch)
Tape Tension Measurement
Meter Reading
more than 70g
cle (more than 2.47 02)
more than 45g*cm
(more than 0.62 ozeinch)
SECTION 4
ELECTRICAL ADJUSTMENTS
4-1. TAPE RECORDER SECTION
Standard Output Level
025¥(— 1068)
Test Tape
[| Type | Signal | Usedtfor
3kHz, 0dB Tape Speed Adjustment
Tape Speed Adjustment
Procedure :
Mode : playback
test tape
WS-48A
(3kHz,0dB)
32
Q
frequency
counter
PHONES jack
| Speed | Deck | Adjustment Point | frequency counter
8 | enfin
Normal 2,970 — 3,000Hz
8 [enfin
5,500 — 5,900Hz
Frequency difference between the beginning and the end of the
tape should be within + 1.5%.
Adjustment Location :
—bottom view—
fmt |
RV303
TAPE SPEED
4-2. RADIO SECTION
Setting :
BAND switch : FM
FM rf signal
generator
telescopic antenna input
22.5kHz frequency deviation by
400Hz signal.
Output level : as low as possible
MW/LW Section
Setting :
BAND switch : MW or LW
AM ff signal
generator
Put
the
lead-wire
antenna
close
to
the
set.
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
VTVM
(range : 0.5 — 5V AC)
PHONES jack
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on VT VM.
Ly,12 ¢ check
98MHz 108MHz
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on VT VM.
621kHz
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on VTVM.
162kHz 261kHz
Adjustment Location : TUNER board (See page 10.)
@ Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
VCO Adjustment
procedure :
FM ff signal
generator
telescopic antenna input
Carrier frequency: 98MHz
Modulation:
Output level:
no modulation
0.1V (100dB)
1. Connect frequency counter to the positions shown below.
2. Tune the set to 93MHz.
3. Adjust RV1 for 76kHz + 50Hz reading on the frequency
counter.
Adjustment Location : TUNER board (See page 10.)
FM TUNING VOLTAGE Adjustment
Procedure :
1. Connect the digital voltmeter to the TUNER board.
2. Tune the set to 108MHz.
3. Adjust L3 for 8V + 0.1V reading on the digital voltmeter.
Adjustment Location : TUNER board (See page 10.)
MW TUNING VOLTAGE Adjustment
Procedure :
1. Connect the digital voltmeter to the TUNER board.
2. Tune the set to 531kHz.
3. Adjust T2 for 1.5V + 0.1V reading on the digital voltmeter.
4. Tune the set to 1,61 1kHz.
5. Adjust CT7 for 8V + 0.1V reading on the digital voltmeter.
Adjustment Location : TUNER board (See page 10.)
LW TUNING VOLTAGE Adjustment
Procedure :
1. Connect the digital voltmeter to the TUNER board.
2. Tune the set to 153kHz.
3. Adjust CT8 for 0.9V + 0.1V reading on the digital voltmeter.
Adjustment Location : TUNER board (See page 10.)

Mw, LW
TUNING VOLTAGE
Adjustment
Adjustment Location : TUNER board
digital voltmeter
FM
TUNING VOLTAGE
é
Adjustment
(Conductor
side)
digital
voltmeter
[I
oF
VCO Adjustment
frequency counter
ANTI
TELESCOPIC
ANTENNA
L3 : FM TUNING VOLTAGE Adjustment
CT7 : MW TUNING VOLTAGE
.
Adjustment
(Component side)
RV1: VCO Adjustment
FM TRACKING {L2
Adjustment Li
T2 : MW TUNING VOLTAGE
Adjustment
CT8 : LW TUNING VOLTAGE
Adjustment
CTS : MW TRACKING
CT6 : LW TRACKING
Adjustment
Adjustment
L5-2 : LW TRACKING L5-1 ; MW TRACKING
Adjustment Adjustment

SECTION 5
DIAGRAMS
5-1. CIRCUIT BOARDS LOCATION
BATTERY TERMINAL board
MIC board
AUDIO board
TUNER board
POWER board
DISPLAY board
LED board
PAL board
(AEP model)
LA4598
TA8148S
/
DTC114TS
2SA1175-HFE
2SC2785-HFE
2SC2786-L
2SC2787-K
lerver side
2SA952-K2
2SC1815-GR
DTC114ES
RN1202
2SC3576
mi
@ SEMICONDUCTOR LEAD LAYOUTS
2SD2096-EF
2SD773-34
2SK105A-30
2SK193-E
° == 55}
5?
2SK514-H
letter side
as
10E2
cathode
anode
RD11ES-B1
RD6.8ES-B2
RD8.2ES-B2
1S8S119
cathode
anode
SVC203RA-V
anode 2
cathode
enode 1
MVR3338S
Jong. short
anode
cathode

5-2. PRINTED WIRING BOARDS (AUDIO, POWER SECTION) e Refer to page 12 for Semiconductor Lead Layouts.
| 6 7 8 9 10 1. =| ft2
@ SEMICONDUCTOR
LOCATION
[POWER BOARD] [BATTERY TERMINAL BOARD}
(DECK A) (DECK B)
HP901 HRP9OI
PB HEAD REC/PB HEAD
{AUDIO
BOARD]
ReeL/APSTAN
.
R-CH
sfits| [KZ
NPS
A
TO TUNER BOARD
KH21
Jno frmnmnpomndunmefornnfommsfeonmnd
=] sP90i
me sPEAKER
+
Note:
gt
7 |
[MIC BOARD] ()
=
=
;
==
[4.—
PHONES
* O—-: parts extracted from the component side.
SEES: : Pattern on the side which is seen.