Sony TC-K333ESA User manual

TC-K333ESA/K9S0ES
SERVICE MANUAL
* Dolby noise reduction and HX Pro headroom extension
manufactured under license from Dolby Laboratories Licensing
Corporation. HX Pro originated by Bang & Olufsen.
“DOLBY”, the double-D symbo! DO and "HX PRO” are trademarks
of Dolby Laboratories Licensing Corporation.
SPECIFICATIONS
Recording system 4-track 2-channel stereo
Fast winding time Approx. 90 sec. (with Sony C-60 cassette)
Bias AC bias
Heads Erasing head x 1 (S&F head)
Recording head x 1 (LA head)
Playback head x 1 (LA head)
Motors Capstan motor x 1
(direct -drive linear torque BSL motor)
Reel motor x 1 (DC motor)
Type IV (Sony
Signal-to-noise ratio (at peak level)
Type Il Type |
Metai-S) (Sony UX-S) (Sony HF-S)
61 dB 59 dB 57 dB
Measured at peak level weithted without NR. The S/N is improved by about
15 dB at 500 Hz and by about 20 dB about 1 kHz with Dolby-C NR on, and by
5 dB at 1 kHz and by 10 dB about 5 kHz with Dolby-B NR on.
Cassette
(Dolby NR OFF)
1.3% (with Sony Metal-S 250 nWb/m, 315 Hz,
3rd H:D.)
Frequency response (Dolby NR OFF)
Type IV cassette 15 - 22,000 Hz (+3 dB, IEC)
(Sony Metal-S) 15 - 16,000 Hz [+3 dB (-4dB recording)]
Type Il cassette 15 - 20,000 Hz (#3 dB, IEC
(Sony UX-S)
Type | cassette 15-4 Hz (+3 dB. |
(Sony HF-S) 8,000 Hz (+3 dB, IEC)
+ 0.04% W.Peak (IEC)
0.022% W.RMS (NAB)
+ 0.065% W.Peak (DIN)
Line inputs Sensitivity 0.16 V
(phono jacks) Input impedance 47 k ohms
CD DIRECT INPUT Input impedance 47 k ohms
Harmonic distortion
Wow and flutter
Inputs
Model Name Using Similar Mechanism TC-K333ESG
Tape Transport Mechanism Type
AEP Model
TC-K990ES
E Model
TC-K333ESA
TCM-200D10
Outputs
Line outputs
(phono jacks)
Rated output level 0.5 V at a load impedance
of 47 k ohms
Load impedance Over 10 k ohms
Output level 0-3 mW ata load
impedance of 32 ohms
AEP model: |
220 - 230 V AC, (or 240 V AC
adjustable by Sony personnel),
50/60 Hz
E model:
120, 220, or 240 V AC adjustable,
50/60 Hz
Power consumption 31 W
Dimensions Approx. 470 x 140 x 380 mm (w/h/d)
(185% x 55% x 15 inches)
including projecting parts and controls
Approx. 12.0 kg (26 lbs 8 oz)
Model for other countries: Approx. 11.2 kg
Headphones
(stereo phone jack)
General
Power requirements
Weight
Supplied accessories Audio connecting cords (2)
Screws (8)
Wireless remote commander (1)*
Sony SUM-3(NS) batteries (2)*
* Not supplied with model for European countries
Design and specifications are subject to change without notice.
Note
This appliance conforms with EEC Directive 87/308/EEC regarding
interference suppression.
STEREO CASSETTE DECK
SONY.

TC-K333ESA/K990ES
TABLE OF CONTENTS
Section Title Page
Specifications Ge? Jb Settee: eae ve Seg ghia OL OL WS BOS Sl WYO S. BLES. Be: -orkeNeve lt
Servicing Note SW gi erate se eRe here. AOS wiles len elie, Siieiie! Solel 3) euahies Oho. oer 18 2
Model Identification #0 MGS S080 <0 BD: WO (O Oc le oreo: ee corer ere 6 ce: 3
SECTION 1. GENERAL -------- "eee ee eee cece eeee 4
SECTION 2. DISASSEMBLY ...........-.--.02205- 8
SECTION 3. ADJUSTMENTS
3-1. Mechanical Adjustments --+--+++++++eeeeee- 10
3-2. Electrical Adjustments -----+-+++s+re erro ees 12
SECTION 4. DIAGRAMS
4-1-1. 10502, 505 (CX20188) Pin Functions ----- 17
4-1-2. IC601 (M50940-313SP) Pin Functions ----- 18
4-1-3. IC801 (M50964-226SP) Pin Functions ----- 19
4-1-4. 1C881 (HD404240A31S) Pin Functions ----: 20
4-2. Circuit Boards Location -----+-+++++++++e:- 20
4-3, IC Block Diagrams SSL en ie ee es een Sw seehe Oe arele 6 ®u8 ec ee 21
4-4. Semiconductor Lead Layouts --+--+-+-+++-++: 22
4-5. Block Diagram --+++ sees e sees eee eee e eee ees 23
4-6. Printed Wiring Boards (Audio Section) 27
4-7. Schematic Diagrm (Audio Section) --------: 31
4-8. Schematic Diagrm (Syscon Section) -----:-- 35
4-6. Printed Wiring Boards (Syscon Section) --- 39
SECTION 5. EXPLODED VIEWS
5-1. Overall Section --+++ ccs rere tere ee eee ee eee 43
5-2. Front Panel Section --++-++++ct eerste ee eeee 44
5-3. Chassis Section -s+crr creer cece eee ee eeees 45
5-4. Mechanism Section -1 (TCM-200D10) -------- 46
5-5. Mechanism Section -2 (TCM-200D10) -------- 47
SECTION
6.
ELECTRICAL
PARTS
LIST
-::::---
48
SERVICING NOTE
Flexible Circuit Board Repairing
@ Keep the temperature of the soldering iron around
270°C during repairing.
® Do not touch the soldering iron on the same con-
ductor of the circuit board (within 3 times).
® Be careful not to apply force on the conductor
when soldering or unsoldering.
Notes on chip component replacement
@® Never reuse a disconnected chip component.
®@ Notice that the minus side of a tantalum capacitor
may be damaged by heat.
TC-K333ESA Model
Checking the Operating Voltage
* Before operating the unit, be sure that the operating voltage of your
unit is identical with that of your local power supply.
120, 220 or 240 V AC adjustable, 50/60 Hz
A voltage selector is located on the rear
panel. lf the selector must be reset,
disconnect the AC power cord and set the
selector to the appropriate voltage.
Other countries
VOLTAGE selector
VOLTAGE
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.

For higher quality recording/playback
+ The Dolby HX PRO* system which improves the linearity of the
tape’s high-range response during recording.
¢ Bias and recording level calibration which ensures optimum
recording conditions to bring out the best in every tape.
« Three-head system (separate recording, playback and erase
heads) which allows you to instantly check the recorded sound
while recording is in progress.
+ Ceramic cassette holder for improved stability of tape running
during playback and recording.
* Professional-level deck design for high mechanical stability and
maximum performance.
For your convenience
« The AMS and Memory Play functions which provide easy access
to a desired selection.
« Timer-activated playback and recording through the use of an
optional timer.
For easier operation
+ Easy-to-read linear counter which shows the elapsed recording
or playing time.
MODEL IDENTIFICATION
— Specification Label—
SONY. 9 wove, no LZ TE-KS33ESA
TC-K990ES
STEREO CASSETTE DECK
LMM
SERIAL NO.
MADE IN JAPAN
TC-K333ESA/K990ES
AEP, Germany Model: AC: 220—230V ~ 50/60Hz
E Model: AC: 120, 220—240V ~ 50/60Hz

TC-K333ESA/K990ES
SECTION 1
GENERAL
This section is extracted from
instruction manual.
\dentifying the
Front Panel -_
For details, refer to the page number
indicated in parenthesis .
POWER switch
[2] AMS (Automatic Music Sensor) buttons
(24)
[3] Remote control sensor
You can remotely control this cassette
deck with:
— The supplied remote commander.
— Aremote commander that came
with a Sony amplifier or receiver if it
has the [i mark and cassette deck
control capability.
— An optional Sony remote
commander with the f@ mark and
cassette deck control capability.
[4] LINEAR COUNTER (28)
[5] Counter buttons
RESET button (28)
MEMORY button (26, 28)
DISPLAY MODE button (20)
[6] Dolby HX PRO button (48)
CALIBRATION button (42)
INPUT button (30)
[9] PEAK PROGRAM METER (34)
REC (recording) LEVEL control (30, 34)
(Continued on next page.)
Identitying the
Front Panel
For details, refer to the page number
indicated in (parenthesis) .
(Continued from previous page.)
[11} MONITOR switch (36)
REC EQ CAL (recording equalizing
calibration) switch (LOW, NORMAL,
HIGH) (44)
REC (recording) LEVEL control for
calibration (38, 42)
BIAS control (38, 42)
[15] DOLBY NR (noise reduction) /MPX
FILTER switch (20, 30)
Cassette holder
@ OPEN/CLOSE button
Tape operation buttons and indicators
<4 (rewind) button
@ (stop) button
Bb (play) button and indicator
PP (fast-forward) button
@ REC (recording) button and indicator
4§ PAUSE button and indicator
© REC MUTE (record muting) button
(50)
PHONES jack (stereo phone jack) (22)
PHONE (headphones) LEVEL control
TIMER switch (54)

Identifying the
Parts
(Except for European model)
PROT
STOP. START STANOB
on oe ee
CASSETTE DECK ff |
REMOTE Commander
The controls on the REMOTE commander
are identical in function and operation to
those with the same name on the main unit.
For details, refer to the page number
indicated in (parenthesis).
[1] & (open/close) button
[2] DISPLAY button
[3] Counter buttons
[4] MONITOR button
[5] Tape operation buttons
(6] CD (Compact Disc) buttons
for controlling Sony CD players
fl (pause) button
4 / PPI buttons for locating selections
sequentially
CD SYNCHRO buttons
for synchronized recording with a Sony
CD player
TC-K333ESA/K990ES
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There are many different types of cassettes
on the market, each with varying magnetic
properties. Although your unit is equipped
with the ATS (Automatic Tape Selection)
system which sets the appropriate
equalization characteristics and bias current
for each tape type, an additional calibration
adjustment can often produce even better
results. Use the bias current and recording
level calibration function to obtain the
optimum recording conditions for your tape.
CALIBRATION
REC LEVEL
Adjusts bias current
within + 20%
Adjusts recording level
within t3dB
Bias calibration
Choosing the optimum bias current for a
tape ensures minimum distortion and flat
frequency response. Lowering the bias
current boosts high-frequency response,
but also results in higher distortion. Raising
the bias, on the other hand, reduces
distortion, but also dampens high-frequency
response. Optimum bias is thus obtained
when the bias current and high-frequency
response are well balanced.
Bias reduced (—)
High-
frequency
response
drops
x)
Output
(level in dB)
Bias increased (+)
Frequency in Hz
« If the bias current is higher or lower than
the optimum setting for a certain tape, the
frequency response changes as shown in
the Chart in Fig. EJ . Changing the bias
can thus be used to tailor the response to
your liking, for example by slightly
emphasizing the upper or lower end.
* The frequency response of metal tapes is
much less affected by changes in the bias
current than other tape types. With some
tapes, the adjustment range of this deck
(+20%) may therefore not be sufficient to
cover every possible requirement.
Recording level calibration
Even when the recording level is adjusted
correctly, using a tape with low sensitivity
will result in a low playback level. The REC
LEVEL calibration control allows you to
compensate for sensitivity differences
among tapes to equalize both recording and
playback levels. This is especially important
when using the Dolby NR system, since it is
most effective when recording and playback
levels are the same.

TC-K333ESA/K990ES
Making an Optimum —
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1 Insert the cassette to be used for
recording.
2 Press CALIBRATION.
Press @, then ff or B> to activate the
recording test tone.
a) Playback level for an 8-kKHz signal
b) Playback level for a 400-Hz signal
Note
* The sound cannot be monitored during
the calibration operation.
* It takes 2 to 3 seconds for the test tone
1 level to stabilize.
4 Adjust BIAS until both meters
OPEN/CLOSE ait ‘ SkBRATION indicate equal playback levels.
a) Ahigh reading on the upper meter
indicates a low bias current.
b) A low reading on the upper meter
indicates a high bias current.
c} An equal reading on both meters
indicates the optimum bias current
condition.
5 Adjust REC LEVEL CALIBRATION
until both meters reach the
recommended level (REC CAL).
a) Recommended level
b) The bias current is now adjusted to
the optimum level and the tape
sensitivity compensation has been
set. Press @, then set
CALIBRATION to OFF. Rewind the
tape and start the actual recording.
REC EQ NORM
REC EQ NORM
REC LEVEL
REC EQ NORM

Making an Optimum ©
Recording
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Although bias currrent and equalization are
automatically set by the Automatic Tape
Selection (ATS) function for the tape being
used, you can use the REC EQ CAL switch
to change the recording characteristics
according to the nature of the source
material or to compensate for the particular
characteristics of the tape.
REC EQCAL
AL,
W, 4
To emphasize higher
frequencies in recordings
For normal recordings
To dampen higher
frequencies in recordings
Bias Calibration Recording
Use the REC EQ CAL switch in conjunction
with the BIAS controi to modify bands of
sound and record according to the tape’s
characteristics.
¢ When recording music which has
strong middle and low frequencies
Set the bias at flat with the REC EQ CAL
switch set in the HIGH position to increase
the bias current.
Adjust the BIAS control so that the HIGH
and LOW meters indicate equal readings.
« When recording music which has
strong high frequencies .
Set the bias at flat with the REC EQ CAL
switch set in the LOW position to
decrease the bias current.
Adjust the BIAS control so that the HIGH
and LOW meters indicate equal readings.
Note
With metal tape, because the amount of
frequency characteristic modulation is not in
proportion to that of the bias, the optimum
bias current may not be obtained using the
methods above.
Another use of the REC EQ CAL
switch
When using special tapes, adjusting the
BIAS control with the REC EQ CAL switch
set in the NORMAL position may not result
in equal readings on the HIGH and LOW
meters. If this occurs, adjust the BIAS
control after setting the REC EQ CAL
switch to HIGH or LOW.
TC-K333ESA/K990ES
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What is the Dolby HX PRO
System?
The Dolby HX PRO system provides
improved linearity in high-range frequency
response during recording. Tapes recorded
with this system retain the same high
quality even when played back on other
tape decks.
As shown in Fig. EY , characteristics such
as output level and distortion differ widely
according to the bias (high-frequency)
current.
High
315 Hz
Distortion
i
6.3
KHz
output
‘
\
10
kHz
315
Hz
distortion
Bias current ———» High
Established bias current
In conventional systems (see Fig. EJ ), the
bias current is susceptible to variations in
certain recording signals which may cause
fluctuations in frequency response,
distortion, or other unwanted
characteristics.
High
| Fluctuation
Output
Frequency ——~® High
With the Dolby HX PRO system, the
effective bias amount added to the bias
current is controlled in millisecond units to
greatly reduce distortion, improving linearity
in high-range response and ensuring high-
intensity recording with minimal distortion
and noise.

TC-K333ESA/K990ES |
SECTION 2
DISASSEMBLY
Note: Foilow the disassembly procedure in the numerical order given.
Cassette Holder
© Lever (joint)
© Spring
Ornamental Plate
@ Ornamental Plate
Pinch Lever/Lever FR @+8 26 x6 << 5
@-O .: Pinch lever S$ (2 pieces) —-O~ my
[1Jand [2]: Pinch lever T
/\ and A\ : Lever FR
A\ Washer 1.5
re:
fe:
2
ae
A\
Lever
FR
cea
+BVTT
3
ol
Pinch
lever
T
oe
4)
Spring
Wp
Leaf
spring
Oy
Washer
ors
BS
D>
@®
Lever
PS
ge
@
Pinch
lever
S
@
Nut

| TC-K333ESA/K990ES
-Comparator Board/Capstan Board/Flywheel/FG Board LX and Z\: Comparator board
@-@ : Capstan board
x +PS 3x6 (2 pieces) ~{3] : FG board (after removing @ and @)
Note: To remove the above parts with the Chassis,
remove the four screws marked with x.
Washer
Flywheel
ywheel
(S)
©
+
BVIT
3x5
(2
pieces)
wK+PS 3X6 5 YES.
LZ poe Capstan belt
(2 pieces) ey aS Q a : @ Capstan board
NY SY @ Bracket
MD board
When attaching, align
mark A to this line.
When attaching, align the boss of
the mode cam to this position.
Mode lever @+8 26x6
PK
\
Sia
cam
A
(4
pieces)
temporary hook the the mode cam to the tip of
belt to this point. the mode lever.
\\ When attaching, ~__ When attaching, align the line of
Reel
Motor
Board
Spacer
M1002 (assist)
@ Ree! Motor board
M1001 (reel)

TC-K333ESA/K990ES
SECTION 3
ADJUSTMENTS
3-1. MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denaturedalcohol—moist-
ened swab:
record/playback head pinch roller
erase head rubber belts
capstan idlers
2. Demagnetize the record/playback and erase head with a
head demagnetizer.
3. Do not use a magnetized screwdriver for the adjust-
ments.
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.
capstan
tape guide (S)
pinch roller (T)
pinch roller (§}
erase head REC/PB head
Tape Path Adjustment
*Refer to Adjustment Position on page 12.
Note:When using the adjustment methods for other than
replacement reasons, please do not tamper unnecessary
with the adjustment screws or the erasehead because
either the supply pinch roller guide or the re-
cord/playback head will be made the standard tape
paths. Moreover, when it is necessary to adjust and
replace two or more of any of the heads and/or pinch
rollers, replace them one by one, completely taking out
first tape path, and then replacing second one.
Preparation:
1. Mirror cassette CQO09C 8-909-—708-01
(or CQ012C 8-909-—708-—02)
If one dose not have this, cut out the sections of a 120
—minute cassette shell as indicated below and use that
cassette.
2. Phillips screwdriver (medium-size):
For the head adjustment screws
Blade —type screwdriver (large-size):
For the supply pinch roller adjustment screws
3. Pen light
4. WS-48B(3 kHz, 0 dB)
5. P-4~A100(10kHz, -10dB)
Definition of Terms: The figures are of a record/playback
head.
Height Declination Depth
Adjustment method:
Note: Only perform this adjustment when the supply pinch
roller is to be replaced.
1. Insert the mirror cassette and put the unit in record/play-
back mode.
2. Check to see whether the tape is curling at the re-
cord/playback head guide or the pinch roller guide.
If it is curling, remove the curl by adjusting the ® tape curl
adjustment screw. Then, check that the tape is running past
the middle of the erasehead.
Record/playback Head
Note: Only perform this adjustment when the record/play-
back head is to be replaced.
1. Insert the mirror cassette and put the unit in record/play-
back mode.
2. (Height Adjustment)Check to see if the tape is curling at
the tape guide of the head. If it is curling, tighten screws @ ,
, and @, respectively by the same angle, moving the
head so that it remains at the same angle throughout the