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 —
atsvore) gel [are]
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
ai=recelaeiiare mm ace ler-lipaclirel a
OF lit ele-l(fola)
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

procedure, If it curls on the bottom side of the mirror
cassette (actually the inner side), tighten all the screws
equally; but loosen them if the tape begins to curl on the top
side(other side).
'
inside
com
outside
fhe
od
normal
Curling
on
the
Curling
on
the
(record/
playback
head
inner
side.
outer
side.
as seen from the side Tighten screws Loosen screws
of the erasehead.) ®.©, and @. @,©, and @.
3. (Declination Adjustment)While in the record/playback
position , set the back tension to O(wind the supply reel with
something thin like a pencil in counterclockwise direction)
and make sure there is no curling or shifting(shifting
up/shifting down)at the guide of the record/playback head.
Because shifting can only occur due to a difference in the
width of the tape and that of the tape guides(curling will
otherwise occur),it is necessary to pay close attention since
it can be easily overlooked.
When there is a shift, tighten screws @ and @ equally and
change the declination of the head. If the tape is shifting up,
tighten the screws, and if it is shifting down, loosen them.
. Repeat the adjustments in steps 2 and 3 and fine adjust the
height and the declination.
. (Preliminary Azimuth Adjustment)
After demagnetizing and cleaning the adjustment head, play
back WS-48B(3kHz, OdB).
Turn screw @ so that the reading on the level meter of the
unit or that of the level meter connected to LINE OUT is
maximized.
If the screw is turned at least half a revolution, repeat the
adjustments from step 1.
6. (Tape Path Check)Connect the oscilloscope to LINE
OUT and play back P-4~A100 (10kHz,-10dB)to display a
resurge waveform. After 20 seconds of record/playback
(after the tension within the loop has been increased
sufficiently), make sure the variation in the resurge is
within + 90 degrees (within + 45 degrees is desired ).
If the variation is greater than this, it is because the decli-
nation and/or the height adjustment is not prefect. Repeat
the adjustment from step 1.
TC-K333ESA/K990ES
test tape
P-4-100S
(10 kHz, ~10 08) Oscilloscope
UNE CUT
Oscilloscope Resurge Waveform
_In Phase 45° 90° 195° 130°
nearness erssnemamimnnm A rae
Good Bad
Note: Only perform this adjustment when the erasehead is
. to be replaced.
1. Insert the mirror cassette and put the unit in re-
cord/playback mode.
2. (Azimuth Adjustment)Adjust the azimuth of the erase-
head by adjusting screws @ and @ so that the runs as
evenly as possible.
@
;
;
Normal
Tighten
@
Tighten
@
Loosen
@
Loosen
@
(The
erasehead
as
seen
when
erasing
the
mirror
cassette.)
3. (Height adjustment)Tum screws ® , @, and @ all by
the same angle so that the portions of the erasehead
visible at top and bottom are nearly of equal width. If the
width at the top is greater, tighten the screws; if the width
at the bottom is greater, loosen the screws.
Erasehead (The erasehead as seen through the
mirror cassette.)
of.
Tape —»
Make. these the same width.

TC-K333ESA/K990ES
4. (Declination Adjustment)Leaving it in the playback
position, put the back tension to O and make certain the
erasehead part and supply pinch roller guide part do not
shift, If there is a shift, turn the screw @ and change the
declination. Looking at it using the mirror cassette , if the
tape shifts up, tighten the screw, and if it shifts down,
loosen the screw.
5. Repeat the adjustments beginning with step 2 and fine
adjust the height and declination. And make sure the tape
does not curl up on the pinch roller guide or the guide
part of the record/playback head.
6. (Depth Adjustment)In order to make the entire head
play the tape smoothly, and to make sure the depth of the
erasehead is neither too shallow nor too deep, loosen
screw @ a bit.
About 0.5 mm
eee Pe eel
ar ae ay we
Erasehead —~
Normal
Record/ playback
Not deep enough Too deep
1. Check to make sure that there are no curls or shifts
throughout the whole tape path and that the tape runs
smoothly.
2. Reapply the locking compound to the adjusted screws.
(The locking compound should only be applied to screw
@ after the azimuth has been adjusted.)
Adjustment Position: As seen from the cassette,
side (top) and MD as seen head
on (bottom).
Pinch Roller Pressing Force Measurement
Mode: playback
Hook needle of the tension gauge to the pinch roller shaft
and push back pinch roller to detach it from capstan .
Then, return it gradually to capstan and read the gauge
when the pinch roller begins turning.
Standard Limits:
Tape-up side: 270 — 350 g(9.5 — 120z)
Supply side: 180 — 280g(6.4 — 9.90z)
capstan
pinch roller
tension gauge
Torque Adjustment and Measurement
1. Insert a tape for torque measurement, CQ-102C, and put
the set to PLAY mode. Adjust RV801 so that the reading
of the torque meter is 40 + 5g.cm.
2. After the adjustment, measure the back—tension and the
FF/REW torque and check that the following specifi-
cations are satisfied.
CQ102C | 30 -60g*em (0.42—-0.830z+inch)
FWD
Back tension
FF/REW CQ-201B 65 —90g+cm (0.90 —1.250z+inch)
CQ-102C =| 7—11g-cm (0.09 +0.0150z+inch)
3-2. ELECTRICAL ADJUSTMENTS
Note: The adjustment should be performed in the order
given in this service manual.
The adjustment should be performed for both L-CH
and R~CH.
@ Simultaneous REC/PB Mode:
Input the signals to LINE IN terminal and set to REC
mode. Set the monitor switch to TAPE, and. monitor the
recorded signal from LINE OUT terminal.
e Switch Position:
DOLBY NR Ooo eee eeeeerereeneseerenssoeesenesnese OFF
ee TIMER crrvecsreestertetscstceecsssessseoesoonsssens OFF
Ser” MONITOR oer eee ee ree reerer er ee eer errr eer eee ee TAPE
\ 2 HX PRO crvrserrecceseceeeesesceesersertecenneseees OFF
CALIBRATION eee ee eeee eee ee eee eee erer er eres) OFF
Supply pinch Takeup pinch CD DIRECT sos hes paisieeinciisiosseteess OFF
roller Erasehead Record/playback roller BIA Sscectnahitneararg) CENTER CLICK
ieee REC LEVEL *sss--+00 CENTER CLICK

e@ 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.
Standrad Input Level
O28 ¥ (1008
Standard Output Level
LINE OUT
OAV CB)
Output Terminal
AF OSC
VTVM
ee) attenuator '%@
ettrOO0O0°
[ Cees |
6000) INE INPUT LINE OUTPUT
MPX FILTER Check
Setting: DOLBY switch: OFF
MPX FILTER switch: OFF
Procedure:
1. Mode: stop
AF OSC
VTVM
*) attenuator T9k2 47 kD Cr)
eee
TrO000 I
[ed |
6002 /-
LINE OUT
LINE IN
315 Hz, 0.25 V (-—10.dB)
2. Apply 315Hz, 0.25V(-10dB)signal and adjust REC
LEVEL(RVS5O01) control so that the LINE OUT level is
0.44V(-SdB).
3. Apply 19kHz 0.25V(-10dB)signal and confirm that the
LINE OUT level is 0.013V(—35dB)or less.
Adjustment Limits:
DOLBY NR switch: B or C
MPX FILTER switch: Line output level when ON.
315Hz: Within 0.49 to 0.39V(within -4dB to -6dB)
19kHz: 0.013V(-35dB)or less.
TC-K333ESA/K990ES
Record/Playback Head Azimuth Adjustment
Procedure:
1. Mode: playback
test tape
P-4-A100S
(0 kHe ~10 08)
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
0.5dB.
L-CH output
peak level within
i) dB within 0.5 dB
R-CH
peek
screw
sition L-CH —~» lock-nut
Po peok R-CH angle
peak
Adjustment Location:
adjustment screw
Playback Level Adjustment
Procedure:
Mode: playback
test tape
P-4-L300
(315 Hz, 0 d8)
LINE OUT
Adjust RV101(L—CH)andRV201(R—CH)to obtain the speci-
fied LINE OUT level.

TC-K333ESA/K990ES |
Adjustment Limits:
LINE OUT level: 0.301 to 0.338V
(-8.2 to -7.2dB)
Level difference between channels:
less than 0.5dB
Check that the LINE OUT level does not change in
playback mode while changing the mode from playback
to stop several times.
3. Phase check
— Play mode —
Reference tape for adjustment
‘P~4-A100
(10kHz, ~10d8) Oscilloscope
L-CH 47k
Line OUT
4, Check that the phase difference between L—ch and R—ch
is within 0 ~ (same to 90° )
Bias OSC Frequency Adjustment
Procedure:
1. Record mode
blank tape
erase
frequency
counter
head
al
Y
°
inductor
Cd)
1. Connect the frequency counter to the inductor which
functions at 1OmH.(When the inductor is a closed mag-
netic circuit, redesign the inductor to be anopenmagnetic
circuit.)
2. Remove the cassette lid, insert the cassette, and put the
unit into REC mode.
3. Move the inductor from the side in close to the erase
head to check the value of the bias.
4. Adjust CPSO1 so that the reading on the frequency
counter is 1OSkHz + 1kHz.
Bias current adjustment .
1. Set the HX PRO switch to ON and insert the METAL
tape.
2. Set RV104, RV204, RV105, RV205, RV106, and RV206
to be in the center position.
3. Connect a digital voltmeter to CNE504(between 2~1 and
2~—3) and adjust the adjustment cores of T101 and T201
so that the voltage is minimized.
CrO. Bias and Record Level Adjustment
Note: This adjustment should be made before Record Bias
Adjustment.
Setting:
REC LEVEL knob: standard record position.
(See page 12.)
HX PRO switch: ON
Procedure:
1. Mode: simultaneous REC/PB
LINE IN
315Hz. 25mV (- 30d8) .
AF
ose
10kHz,
25mV
(-30dB)
no-signal
tape
E>} 10kn CS-222
attenuetor
{e)
re,
11 O00 3 —_
LINE OUT
2. Adjust RV106(L—CH)and RV206(R-CH)so that the
playback output level of 10kHz signal is 0.3dB —0.3dB
with respect to that 315Hz. *** Record Bias Adjustment.
3. Adjust RV102(L—CH)and RV202(R-CH)so that the
playback output level of 315Hz is ~25.3dB to -24.7dB.
eee Record Level Adjustment.

Metal Bias Adjustment
Setting:
REC LEVEL knob: standard record position.
(See page 12.)
Procedure:
1. Mode: simultaneous REC/PB
31$H2z, 25mv( —30d8)
AF OSC 10kHz, 25mv( —3008) No-signal tape
63 10x LINE INPUT CS-413
O] attenuator
ener
tt OOO
LINE OUTPUT
2. Adjust RV510(L-—CH)and RV205(R-CH)so that the
difference between the playback output at 315Hz and that
of 10kHz in R-CH is within 0.5dB to —0.5dB.
Normal Bias Adjustment
Setting:
REC LEVEL knob: standard record position.
(See page 12.)
Procedure:
1. Mode: simultaneous REC/PB
LINE IN
10 kHz, 25 mV (~30 dB)
AF OSC 315 Hz, 25 mV (-30 08)
no-signal tape
10k2Q
&) attenuator Contes
oo 0
11,000 71 3 ae
[ ree)
LINE OUT
| TC-K333ESA/K990ES
2. Set the HXPRO switch to ON.
3. Adjust RV103(L—CH)and RV203(R—CH)so that the
difference between the playback output at 315Hz and that
of 10kHz in R—CH is within 0.5dB to -0.5dB.
4. Set the HXPRO switch to OFF.
5. Adjust RV104(L-CH)and RV204(R-CH)so that the
difference between the playback output at 10kHz when
the HXPRO is ON and that of 10kHz when ON is within
0.5dB to -0.5dB.
Meter Level Adjustment
Setting:
REC LEVEL knob: standard record position.
(See page 12.)
‘Procedure:
1. Stop mode
AF OSC
LINE OUT
LINE IN
315 Hz, 0.25 V (~10 dB)
2. Adjust RV107(L-CH)and RV207(R-CH)so that a
reading of the meter is set to OVU and the lamp is list.
3. Adjust REC level so that the LINE OUT level is set to
+10dB and check that all the lamps are lit.
Calibration OSC and Calibration Meter Adjustment
Setting: CALIBRATION switch: ON
Procedure(OSC OUT LEVEL):
1. Mode: record(no-signal(LINE INPUT))
no-signal tape

TC-K333ESA/K990ES
2. Adjust RV504 so that a check—point level at 400Hz is 2. Preset RV108(LOW)so that segment(a)in LOW FREQ
+10dB. CAL LEVEL meter lights. Then adjust RV204 to the
3. Adjust RV503 so that a check—point level at 8kHz is point where segment (a)goes out.
+10dB.
HIGH : LEVEL (a) may flicker.
Procedure(CAL METER ADJ): FC a ah als el oa areal ces
1. Put the set in record mode and adjust RV208(HIGH)so eo as
that HIGH FREQ segments in the CAL LEVEL meter
light thoroughly up to OVU as shown in the figure below.
LOW: LEVEL t not flicker.
Segment(a)may
flicker.
(a)
must
not
flicker
Location Diagram of the Adjustment Parts
Back panel
@
SYSCON board
Ga wd
Og
Playback level adjustment
RV101 (L-CH)
RV201 (R-CH)
REC level adjustment
RV102 (L-CH) (Recording board)
RV202 (R-CH)
FWD torque adjustment
RV801
REC board
O86 Og |
Bo
oR)
RV104 (L-CH)
current
BAe at RV204 (R-CH)
i HXPRO adjustment
Test point
RV106 (L~CH)
BIAS il adjustment
RV206 (R-CH)
T101 (L-CH)
if T201 (R-CH) |
99 er
BIAS current 6 6
8kHz | CAL oscillation
400Hz |} test point
+)
RV207 (R~CH)
RV107 (L-CH) CAL oscillation adjustment
RV504 (400Hz)
RV503 (8kHz)
CPSO1 .
CO O
Level meter adjustment {
+) +)
CH) 1
: RV L-CH
SIAC S aausimente
RV203 (R-CH)
BIAS oscillation frequency
adjustment
(105kHz)
RV205 (R-CH)
RV108 (L-CH) ;
elas IV. adjustment
CAL meter edustment |
RV208 (R-CH) RV105 (L-CH)

| TC-K333ESA/K990ES
SECTION 4
DIAGRAMS
4-1-1. 1€502, 505 (CX20188) PIN FUNCTIONS
An electronic switch circuit for the operation mode control is included. Controls are performed by adding direct current
voltages VH, VM, and VL to Dolby OFF/B/C and calibration //REC/ Playback terminals.
CX20188
Pin name Description
l. Vec Positive power supply terminal.
2, 41. REC IN Recording input terminal.
3. I] REF Reference current input terminal.
4, 39, PB IN Playback input terminal.
5. CAL/REC/PB | Calibration/recording/playback select terminal
6, 37, PB FB Playback feedback terminal.
T, 36, REC FB Recording feedback terminal,
8, 35. GND GND terminal.
‘ LINE OUT | Line output (decode output) terminal.
SSK Spectral skewing switch terminal.
VF IN Encode circuit input terminal.
HPF H HLS high-pass filter terminal.
TCH 2 HLS detector time constant terminal 2,
HLS detector time constant terminal 1.
HLS encoder error reduction terminal.
LLS detector time constant terminal 2,
LLS detector time constant terminal 1,
LLS encoder error reduction terminal.
LLS high-pass filter terminal.
Anti-saturation terminal. —
Recording output (encode output) terminal.
Dolby NR off/B type/C type select terminal.
Calibration input terminal.
Negative power supply terminal.

TC-K333ESA/K990ES |
4-1-2. 1C601 (M50940-313SP) PIN FUNCTIONS
Level meter display of 24-segment fluorescent display, etc., are performed by receiving direction from the master
microcomputer (IC801).
Pin No. Pin name a Description
A/D input-port reference voltage input (+5V)
Not used. (Connected to +5V)
Not used. (Connected to +5V)
Data input from the master microcomputer (IC801) (analog)
Data input from the master microcomputer (1C801) (analog)
Not used. (Connected to +5V)
Level meter L-CH input(analog) from the meter amplifier(IC514)
Level meter R-CH input(analog) from the meter amplifier (IC514)
Not used.
Fluorescent display grid output
Not used.
Not used. (Connected to pin ®. )
Not used.
Not used.
Not used.
Fluorescent display segment output("TAPE” displayed). "L": TAPE displayed. "H": SOURCE
displayed.
Fluorescent display segment output ("OVER LEVEL” displayed). It is displayed when “L".
Fluorescent display segment output("TYPE I" displayed). It is displayed when "L".
Fluorescent display segment output("TYPE II" displayed). It is displayed when "L".
Fluorescent display segment output("TYPE I” displayed). It is displayed when "L".
Power supply terminal (GND)
Reset input
Clock input (4MHz)
Clock outupt.
XCIN Not used. (Connected to GND)
XCOUT Not used.
Vss Power supply terminal (GND)
® Not used. |
_ VER Version switching input(Always set to "L")
TEST Test mode input. "L": All the lamps of the meter are lit.
CAL Calibration seers input. "L": CAL mode. "H": Normal mode.
IN Not used. (Connected to GND. )
VP Fluorescent display segment output's pull-down power supply terminal (-22V)
$23~S0 Fluorescent display segment output(meter display)
AVcc Power supply terminal (+5V)
Vec Power supply terminal (+5V)
OO 0 0 CO COC OO CO et et mt mt mt Rt
OVER LEVEL
TYPE I
TYPE 1
TYPE IV
CNVss
RESET
XIN
XOUT
0
0
0
0
I
I
0

| TC-K333ESA/K990ES
4-1-3. 1C801 (IM50964-226SP) PIN FUNCTIONS
vcc Power supply: +5V.
AVss 7 Power supply: GND.
Vref I A/D port reference voltage input.
DATA 0 Data output (Analog) to Display Microcomputer.
PWM 7 Not used for this model.
Data output to Display Microcomputer (IC601) .
REC LED output.
PAUSE LED output.
PLAY LED output.
Key input.0V= 4 , 1V=M, 2V= 4 , 3V=» , 4V= @
AD6
AD5
TIMER SW
T-PULS
S-PULS
Key input.0V= » , IV=IIl, 2V=4 , 3V=m* , 4V= O
Key input.OV=RESET , 1V=MEMORY , 2V=DISPLAY MODE
Timer switch input (Analog) .0V=REC , 1V=PLAY , 2V=OFF.
Take-up reel base sersor input.
Supply reel base sersor input.
COUNT 0 Not used for this model (Cnnected to GND).
Not used for this model (Cnnected to GND).
Reset output to counter Microcomputer (IC881).
Shift clock output (250kHz) to Counter Microcomputer (IC881).
Serial data output to Counter Microcomputer (IC881).
RSTOUT
S-CLOCK
S-OUT
Not used for this model (Connected to S-OUT).
SIRCS phase input.
SIRCS hegative phase input.
Not used for this model (Connected to GND).
Power down detection input.
S-IN
SIRCS-L
SIRCS~E
POW~-OUT
POWER IN
Power down detection input.
Power supply: GND.
Reset input.
-Clock input (4MHz).
Clock output (4MHz).
Not used for this model.
Power supply: GND.
Rotary encoder input to detect the position of the head base of the mechanical block.
Rotary encoder input to detect the position of the head base of the mechanical block.
Rotary encoder input to detect the position of the head base of the mechanical -block.
Rotary encoder input to detect the position of the head base of the mechanical block.
OPEN switch input of the mechanical block.
CLOSE switch input of the mechanical block.
DOOR switch input of the mechanical block.
REC switch input of the mechanical block.
CLOSE SW
DOOR SW
REC SW
70 uw switch input of the mechanical block.
HALF switch.
METAL switch.
Not used for this model (Connected to GND) .-
Head base DOWN output of the mechanical block.
base UP output of the mechanical block.
motor rotate with FWD.
motor rotate with REV.
motor rotate at PLAY speed.
motor rotate at FF/REW speed.
Bias oscillation on and off control.
REC MUTE control output.
MONITOR switch output.
Line mute control output.
Not used for this model (Connected to GND).
REC MUTE
MONITOR OUT
LINE MUTE
AMS MODE
TYPE I
TYPE Ii
TYPEIV
AMS SIG
switch output.
equalizer change output.
equalizer change output.
equalizer change output.
signal input. No song detected=Low. Song detected=High.
SOURCE SW MONITOR switch input.
MONITOR switch input.
CALIBRATION switch input.
Data output to Display Microcomputer.
0
0
0
0
I
I
I
I
I
I
I
0
0
0
I
I
I
0
I
I
I
I
0
I
I
I
I
I
I
I
I
I
I
I
0
0
0
0
0
0
0
0
0
0
0
0
0
0
I
I
I
I
0

TC-K333ESA/K990ES |
4-1-4. 1C881 (HD404240A31S) PIN FUNCTIONS
Fluorescent dynamic display is performed by receiving count data from the master microcomputer (IC801)
: G3
Fluorescent display grid output
G4 Fluorescent display grid output
dot Fluorescent display segment output
P DWN Pull-down power supply terminal. for fluorescent display segment output (-22V)
g~a Fluorescent display segment output
- Not used.
DIM1~DIM4 Dimmer input (Pins @ and @ are “H". Others are opened and fixed: Blanking time 550usec;
grid ON time 450usec. ) ,
Not used.
Power supply terminal (+5V) .
Shift clock input (250kHz) from the master microcomputer (IC801)
Serial data input (Data are sent by 1 byte every 6msec.) from the master microcomputer
(1C801)
Not used.
Reset input from the master microcomputer (1C801). Reset when “H",
Connected to +5V.
Clock input (4MHz)
Clock input (4MHz)
Power supply terminal (GND)
Not used.
Not used. (Connected to +5V)
Not used,
Fluorescent display grid output
Fluorescent display grid output
4-2. CIRCUIT BOARDS LOCATION
SYSCON board
REEL MOTOR board
AC SW
Pecede VS board (TC-K333ESA model)
RECT board
TIMER SW board PB board
HP AMP board
PIN JACK board
COUNTER board
REC board
MD board
FG board COMPARATOR board
METER board CAPSTAN board
REC VOL board
REC EQ SW board
MONITOR SW board