Sony TC-FX4040 User manual

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SERVICE
MANUAL
AEP
Model
‘Dolby’ and the double-D symbol are the trade marks of
Dolby Laboratories Licensing Corporation. Noise reduction
system manufactured under license from Dolby Laboratories
Licensing Corporation.
SPECIFICATIONS Tape Transport Mechanism Type | TCM-150V4.
Recording system Total harmonic distortion
4-track 2-channel stereo 1.0% (with Sony METAL-ES cassette)
Fast-forward and rewind time Frequency response
Approx. 100 sec. (with C-60 cassette) . DOLBY NR OFF
Bias frequency 105 kHz : . e With TYPE IV cassette (Sony METAL-ES)
Signal-to-noise ratio (NAB, at peak level) 20 - 17,000 Hz
30 - 16,000 Hz (+3 dB)
30 ~ 13,000 Hz (+3 dB, 0 VU recording)
30 - 16,000 Hz (DIN)
¢ With TYPE Il cassette (Sony UCX)
20 - 17,000 Hz
30 - 14,000 Hz (+3 dB)
30 — 16,000 Hz (DIN)
¢ With TYPE | cassette (Sony HF-S)
20 - 16,000 Hz
30 - 13,000 Hz (DIN)
Wow and flutter 0.05% WRMS (NAB)
+0.14% (DIN)
SAFETY-RELATED COMPONENT WARNING!! Inputs Microphone inputs (phone jacks)
Sensitivity 0.25 mV (-70 dB)
COMPONENTS IDENTIFIED BY SHADING AND MARK For a low impedance microphone
A
ON
THE
SCHEMATIC
DIAGRAMS
AND
IN
THE
Line
inputs
(phono
jacks)
PARTS LIST ARE CRITICAL TO SAFE OPERATION. Sensitivity 77.5 mV (—20 dB)
REPLACE THESE COMPONENTS WITH SONY PARTS Input impedance 47 kilohms
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
Outputs Line outputs (phono jacks)
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. Output level 0.44 V (-5 dB) at load
impedance 4.7 kilohms
Load impedance over 10 kilohms
Headphone output (stereo phone jack)
Output level ~28 dB at a load impedance
of 8ohms
"cassette Dolby NR switch B-TYPE ON | C-TYPE ON
TYPE IV (Sony METAL-ES) | 55dB | 65dB 71 dB
TYPE II (Sony UCX) 55 dB
| TYPE | (Sony HF-S) | 52 dB
~ Continued on next page —
STEREO CASSETTE DECK
=
SONY.
TC

TC-FX4040
General
Power requirements
220 V ac, 50/60 Hz
(240 V ac adjustable by authorized Sony
personnel)
Power consumption
‘ 12 watts
Dimensions Approx. 430 x 105 x 245 mm (w/h/d)
(17 x 41/, x 93/, inches)
including projecting parts and controls
Weight Approx. 3.6 kg (7 Ibs 15 02)
Note
This appliance conforms with EEC Directives 76/889 and 82/499
regarding interference suppression.

TC-FX4040 |
SECTION
1
:
OUTLINE
1-1. FUNCTION OF CONTROLS
E) TAPE COUNTER
RESET
hp PEAK LEVEL METER
b
Rearieey,
:
Y
FULL
LOGIC
FEATHER
TOUCH
MECHANISM
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TC-FX4040
Each number in the text is keyed to that of the illustra-
tions on pages 3.
Front panel (Fig. [A])
@ POWER switch
@ Cassette holder
© TAPE COUNTER and RESET button
The tape counter provides a numerical reference point
while recording which can be used to index a recorded
cassette. To reset to zero, press the RESET button.
@ Function indicators
@ PEAK LEVEL METERs
These meters show the peak input level of each channel
during recording, and recorded levels in the playback
mode.
@ 4 (eject) button
Press this button to open the cassette holder.
@ HEADPHONES jack (stereo phone jack)
© <4 (rewind) key
Press this key to advance the tape rapidly to the left. It is
also used for the auto play and review function.
tions.
Op (playback) key
Press
this
key
to
playback
the
cassette.
To
record,
press
this
key
while
holding
the
@
key
down.
The
tape
is
transported
to
the
right.
© gi (stop) key
Opp (fast-forward) key
Press this key to advance the tape rapidly to the right. It
is also used for the cue function.
tions.
® 11 (pause) key
Press
this
key
to
stop
the
tape
running
for
a
moment
dur-
ing
recording
or playback.
This
key
is
also
used
for
the
cue
and
review
functions.
® 0 (record muting) key
Press this key to eliminate unwanted material and to in-
sert a blank space during recording.
® @ (record) key
Press this key together with the & key to start recording.
® DOLBY NR* switch
For
recording
or
playback
with
Dolby
B-type
system,
set
the
DOLBY
NR
switch
to
B.
For
recording
or
playback
with
Dolby
C-type
NR
system,
set
it
to
C.
For
recording
without
Dolby
NR
system,
set
it
to
OFF.
*“Dolby”
and
the
double-D
symbol
are
trade
marks
of
the
Dolby
Labora-
tories
Licensing
Corporation.
Noise
reduction
system
manufactured
under
license
from
Dolby
Laboratories
Licensing
Corporation.
The
Dolby
NR
system
reduces
tape
hiss
and
improves
the
signal-to-
noise
ratio
at
low-level
high-frequency
signals.
@TAPE select buttons
Depress
one
of
the
TAPE
select
buttons,
depending
on
which
type
of
tape
you
use.
The
optimum
bias
current
adjustment
for
recording
and
the
optimum
equalization
adjustment
for
both
recording
and
playback
are
set.
@® MIC jacks (phone jack)
Any
low-impedance
microphone
equipped
with
a
phone
plug may be used.
®
REC
LEVEL
(recording
level)
controls
These
controls
adjust
the
recording
level.
Rear panel (Fig. [B])
®LINE
IN
(line
input)
jacks
(phono
jack)
Accept
tape
outputs
from
an
amplifier
for
tape
recording
and
line
outputs
from
another
tape
deck
when
dubbing
a
tape
from
that
unit.
@ LINE OUT (line output) jacks (phono jack)
Accept
tape
inputs
from
an
amplifier
for
playing
back
a
tape
and
line
inputs
from
another
tape
deck
for
dubbing
a
tape
onto
that
unit.
@SYNC connector (3-pin)
For
synchro
recording,
connect
to
the
SYNC
connector
of
the
turntable
system.
For
further
details,
refer
to
the
instruction
manual
of
the
Sony
turntable
system.
@ CONTROL S IN connector
Connect
to
the
CONTROL
S
OUT
connector
of
Sony
audio
equipments
equipped
with
a
4-pin
remote
control
connector.
@ CONTROL S OUT connector
Connect
to
the
CONTROL
S
IN
connector
of
Sony
audio
equipments
equipped
with
a
4-pin
remote
control
con-
nector.
@ AC power cord

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TC-FX4040
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TAPE DET dl accipeNe 8
PREVENTION

TC-FX4040
SECTION 2
DISASSEMBLY
Note:
Follow
the
disassembly
procedure
in
the
numerical:
order
given.
CASE
Remove four (4) screws and case.
@ Remove screws, +BVTT3 x 6 (two).
FRONT
PANEL
.
_@ Remove counter belt and temporarily
hang it on the protrusion of the —
mechanism. chassis.
protrusion of
mechanism chassis
counter belt
Remove a screw, tBVTT3 x 6,
and a solder lug.
© Remove screws, +BVTT3 x 6 ( three).
@ Pull front panel forward. Take care not to break
lead wires extracting from PC boards. Front
panel contains six (6) PC boards.
© Unlock front-panel claws
(both sides) from chassis,

TC-FX4040
DECK MECHANISM
Remove screws, +BVTTS x 6 (two).
PC BOARDS FROM FRONT PANEL Remove appropriate screws or unlock appropriate claws
. from PC boards as shown.
screws,
#BTP3
x
8
screws,
+BTP3
x
10
screws, +BTP3 x 8
screws, +BTP3 x 8
REC LEVEL control
power switch board
photo coupler board
function button block
meter board
AUDIO BOARD
N
N
‘
‘N
N
@ screw, *BVTT3 x6
‘x
audio board
shield plate

TC-FX4040
LOCATION OF PRINTED-CIRCUIT BOARDS
remote-control board
photo-coupler board
audio board Pin-jack board
detection-switch board
Power-switch board‘
headphone jack board
function-switch board
meter board
REC LEVEL control board
RECONNECTING CONNECTORS
white; 4-pin from function-switch block
= P52
N
Cf
Cy
- | ee Be
white;
8-pin
from
deck
mechanism
Ya
wa °
t red; 4-pin from :
; function-switch block
Tk
A gray; 3-pin from
white; 6-pin shielded cable from deck mechanism
deck mechanism : i fe
white;
2-pin
shielded
cable
from
;
ES
gray;
6-pin
from
deck mechanism R deck mechanism

TC-FX4040
SECTION 3
ADJUSTMENTS
3-1. MECHANICAL ADJUSTMENTS
PRECAUTION
1.
Clean:
the
following
parts
with
a
denatured-
3.
Do
not
use
a
magnetized
screwdriver
for
the
alcohol-moistened
swab:
adjustments.
record/playback
head
pinch
roller
4.
After
the
adjustments,
apply
suitable
locking
erase
head
rubber
belts
compound
to
the
parts
adjusted.
capstan
5.
The
adjustments
should
be
performed
with
the
2.
Demagnetize
the
record/playback
head
with
a
rated
power
supply
voltage
unless
otherwise
head
demagnetizer.
noted.
- Torque Measurement
Head Height Adjustment
1.
Prepare
an
adjustment
cassette
as
shown
below,
Tome
PRA
Meter
Meter
reading
or
mirror
cassette.
Forward
CQ-102C
eteoe
ae
Back
Tension
CQ-102C
©.
03
as
Ay
eee
cd
Rewind
|
C2208
|
12.0
onincn)
C-120
Cut
out
hatched
Pinch
Roller
Pressure
Measurement
tape
cassette
portions.
2...
In
playback
mode
and
viewing
from
the
front,
—
Playback
Mode
—
adjust the head heights to eliminate tape curl
and
tape
twist
at
the
portions
shown
by
the
@
Slowly
return
the
pinch
roller
atrows
and
read
the
spring
scale
just
when
.
the
pinch
roller
starts
rotating.
(The capstan should
first contact here.)
erase head — record/playback
head
= eee
| 5 = Tr ‘
=]
7.
5)
@
tension
gauge
3-513-237-01
(t=0.1)
:
200—300
g-cm
ad
bebe
eae
ser
.
(2,774.16
oz-inch)
Shim, head height adjustment

3-2. ELECTRICAL ADJUSTMENTS
Note: The adjustment should be performed in
the order given in this service manual.
The adjustments should be performed
for both L-CH and R-CH.
@ TAPE switches are automatically set according to
the tape.
TYPEI : NORMAL
TYPE II: CrO2
CS40(CS-412)] TYPEIV :METAL |
@ Switches and controls should be set as follows
unless otherwise specified.
DOLBY NR switch: OFF
@ Standard Record:
Deliver the standard input signal level to the
input jack and set the REC LEVEL control to
obtain the standard output signal level.
Standard Input Level
ee ee ee
0.25V (-104B)
Standard Output Level
LINE OUT
CABSV (508)
TC-FX4040
Speed Adjustment
Procedure:
Mode: playback
speed checker
LFM-30
or
digital frequency
test tape counter
WS-48A
(3kHz, OdB)
LINE OUT
Specification:
Speed checker Digital frequency counter
Frequency difference between the beginning
and the end of the tape should be within 0.8%
(25Hz).
Adjustment Location:
— capstan motor —
adjustment control inside motor
TC-FX4040
Record/playback Head Azimuth Adjustment
Procedure:
1... Mode: playback
test tape
P-4-A063 VTVM
(6.3kHz, —10dB}
Playback Level Adjustment
Procedure:
Mode: playback
test tape
P-4-L300
(315Hz, OdB)
LINE OUT
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 1.0dB.
0.435V.
LINE OUT (ea)
Adjust RV104 (L-CH) and RV204 (R-CH).
Specification:
LINE OUT level: 0.46 — 0.42V
(—4.5 — —5.5dB)
Level difference between channels:
less than 0.5dB (0.05V)
Check. that the LINE OUT level does not
change in playback mode while chaging the
Screw: Pk mode from playback to stop several times.
position
—»
angle
L-CH R-CH
peal ~ peek; Adjustment Location:
3. Phase Check ;
Mode:
playback
—
audio
board
—
test tape
P-4-A063 oscilloscope ;
(6.3kHz,
—10d0B)
RV104
-L-CH 47 k2Q
R-CH
LINE OUT
Screen pattern
DOOOGS
in phase 45° 90° 135°
ice ge eae
good wrong
Record:
Setting
I
Proced'
1. N
af os.
2; i)
A
t.
Q'
Adjusti

jjustment
VTVM
a7 kQ [7]
for the maximum
lo not match, turn
both of .output
| .OdB.
ie
—» angle
R-CH
peak .
oscilloscope
Playback Level Adjustment
Procedure:
Mode: playback
test tape
P-4-1.300
(315Hz, OdB)
0.435V
(—5aB)
LINE OUT
Adjust RV104 (L-CH)’ and RV204 (R-CH).
Specification:
LINE OUT level: 0.46 — 0.42V
(—4.5 — —5.5dB)
Level difference between channels:
: less than 0.5dB (0.05V)
Check that the LINE OUT level does not
change in playback mode while chaging the
mode from playback to stop several times.
Adjustment Location:
— audio board —
RV104 RV204
(L-CH)
°
(R-CH)
ET
Record Bias Adjustment
Setting:
REC LEVEL control: _ standard record
(See page 11)
Procedure:
1.
Mode: record
af osc
blank tape
CS-17
10k2
O attenuator
ott ’
O I I, oxeKe)
LINE IN
1) 315Hz
ae het 25mV (-30dB)
2. Mode: playback
recorded VTVM
portion
k
LINE OUT
ADjust CT101 (L-CH) and CT201 (R-CH) so
that the LINE OUT level of 10kHz signal is
OdB +0.5dB relative to that of 315Hz.
Adjustment Location:
— audio board —
~ (L-CH) (R-CH)
TC-FX4040
TC-FX4040_
Record Level Adjustment
Setting:
REC LEVEL control: standard record
(See page 11)
Procedure:
1. Mode: record
af osc
blank tape
€) ee CS-17
| _2tenvator ;
oO —
LINE IN ,
315Hz, 0.25V (1008)
2. . Mode: playback
recorded
portion
LINE OUT
Adjust RV102 (L-CH) and RV202 (R-CH).
Specification:
LINE OUT level: 0.46 — 0.42V
(—4.5 — —5.5dB)
Adjustment Location:
— audio board —
Rv202 RV102
(R-CH) (L-CH)
r)
Semiconductor Lead Layouts:
2S8A1175
CX10032A 2$D1020
cuz letter side
IR2E02
M50761-417P
M5218L
TC9310N-071
line Wont)
or
slit
or ;
ae te " 280945
(Top view)
DTA114ES
DTA144WS
DTC114ES EC’
2SB808 ;
2SC2603F HZ6A3L
2SD1012 HZ6B3L
1$S202-1
10E2
11E2
cathode
/
2SB731
2SD809-K
letter side
GL-9PG4
| cathode
anode