Sony TC-W32 User manual

TC-W32/W290
SERVICE MANUAL
Photo : TC-W32
Model Name Using Similar Mechanism
Tape Transport Mechanism Type TCM-210W 1
US Model
Canadian Model
TC-W32 -
AEP Model
| E Model
| Australian Model
TC-W290
SPECIFICATIONS
Recording system 4-track 2-channel stereo — Outputs
Fast winding time Approx. 120 sec. (with Sony C-60 Line outputs Rated output 0.5 V ata load
: cassette) (phono jacks) level impedance of
Bias AC bias 47 kilonms
Signal-to-noise ratio (at peak level)
Type IV Type I! Type |
(Sony Metal- | (Sony UX-S) | (Sony HF-S)
Select/S)
58 dB 57 dB 55 dB
Measured at peak level weighted 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.
Harmonic distortion
0.4% (with Sony Type I, 160 nWb/m,
315 Hz, 3rd H.D.)
1.8% (with Sony Type IV, 250 nWb/m,
315 Hz, 3rd H.D.)
Frequency response (Dolby NR OFF)
Type IV cassette | 30 - 15,000 Hz (+3 dB,IEC)
(Sony Metal- 30 - 13,000 Hz [+3 dB (-4dB
Select/S) recording)]
Type {I cassette
(Sony UX-S) 30 - 14,000 Hz (+3 dB, IEC)
Type | cassette
(Sony HF-S) 30 - 13,000 Hz (+3 dB,IEC)
+0.15% W.Peak (IEC)
0.1% W.RMS (NAB)
+0.2% W.Peak (DIN)
Wow and flutter
Inputs
ers O16V
(phono jacks) input impedance 47 kilohms
Load impedance | Over 10 kilohms
Headphones Output level 1 mW ata load
(stereo phone jack) impedance of
32 ohms
General
Power requirements | Model for U.S.A.:
120 V AC, 60 Hz
Model for AEP :
220-230V AC, (or 240V AC adjustable by
Sony personnel),50/60Hz
Model for Canadian :120V AC , 60Hz
Model for E :120, 220, or 240 V AC adjustable,
50/60Hz
Model for the Australia:
240 V AC (or 220 V AC adjustable
by Sony personnel), 50/60 Hz
Power consumption 15 W
Dimensions Approx. 430 x 123 x 290 mm (w/h/d)
(17 x 4 %/s x 1114/4 inches) including
projecting parts and controls
Weight Approx. 3.8 kg (8 Ibs 6 0z}
Supplied accessories
Audio connecting cords (2)
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-W32/W290 |
TABLE OF CONTENTS
; MODEL IDENTIFICATION
DecHOn atte Fuge - Specification Label - TC-W32
Specifications
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TC-W290
1. SERVICING NOTE ictieseissesscecssisactscsteeissecancsnese cones ks
SONY. move.nnoWww
2. GENERAL
Identifying the Parts Wig 0: ws0io0;e 0.00; 00! 0.998 whe 00.6, 056-050-060: .0-0 pete cee: 6° 6oez8c6:0:6. Sree ce o%0K6 4 | STEREO CASSETTE DECK
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3. ADJUSTMENTS CCZ=ZH7@|H/ $@MM0"@@#t6"##
3-1, Mechanical Adjustments Eee eerer eee ee eee ee ee ee ee ee 5
3-2. Electrical Adjustments POCO eee m eee e eee Hera eee neers eHeeneeeeseres 5
4. rabid : SERIAL NO.
me ‘ OC. lagram PTH HEHEHE STD HOHHEHHHEHHHH HHH SHH HHO HEHEHE RHO RHEE
4-2. Printed Wiring Boards OC OOOO TOO OCT T Il MADE IN JAPAN
4-3, Schematic Diagrams © 010.6615: 0; 6.6.0": 08 ei e 606% 0.026.660. 6:6U Oere (ee te. Celeieoe. 8 15
US, Canadian Model : AC 120V 60Hz 15W
5.
EXPLANATION
OF
IC
TERMINALS
----+-------
esses
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19
AEP
Model
:
AC
220
—
230V
~
50/60Hz
: E Model : AC 120, 220, 240V
6.
EXPLODED
VIEWS
~
50/60Hz
15W
6-1.
Chassis
Section
PER
EREE
TERT
EG
OTT
IOTR
AE
ROOT
OT
22
Australian
Model
:
AC
240V~
50/60Hz
6-2. Front Panel Section COCO EEHe errr He HOH H ROLE EH EO HORE EES ESO E OD 23
6-3. Mechanism Section-1 (TCM-21OW1)-rrrrstseereeeeeeeees 24
6-4, Mechanism Section-2 (TCM-21OW 1 ):srrrrreseeeeee rene 25
Operating voltage (E model)
7. ELECTRICAL PARTS LIST vr -s-rereeresrresesseseess 26 Operate the unit on either 120,220 or 240V AC, 50/60Hz,
Before connecting the unit to the power source, check that
the operating voltage of your unit is the same as the local
power line voltage.
The voltage selector is located on the rear panel.If the
selector must be reset, disconnect the AC power cord and
set the selector to the appropriate voltage.
VOLTAGE Selector
VOLTAGE .
ATTENTION AU COMPOSANT AYANT
SAFETY-RELATED
COMPONENT
WARNING!!
RAPPORT
A
LA
SECURITE!
COMPONENTS IDENTIFIED BY MARK A\ OR DOTTED LINE LES COMPOSANTS IDENTIFIES PAR UNE MARQUE /\
WITH MARK f\ 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 PUBLISHED BY SONY.
SUR LES DIAGRAMMES SCHEMATIQUES ET LA LISTE DES
PIECES SONT CRITIQUES POUR LA SECURITE DE
FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS
QUE PAR DES PIECES SONY DONT LES NUMEROS SONT
DONNES DANS CE MANUEL OU DANS LES SUPPLEMENTS:
PUBLIES PAR SONY.

| TC-W32/W290
SECTION 1
SERVICING NOTE
SAFETY CHECK-OUT |
After correcting the original service problem, perform
the following safety check before releasing the set to the
customer :
Check the antenna terminals, metal trim, ” metallized”
knobs, screws, and all other exposed metal parts for AC
leakage. Check leakage as described below.
LEAKAGE TEST
The AC leakage from any exposed metal part to earth
ground and from all exposed metal parts to any exposed
metal part having a return to chassis, must not exceed
0.5 mA (500 microampers.).
Leakage current can be measured by any one of three
methods. __
1. A commercial leakage tester, such as the Simpson
229 or RCA WT-540A. Follow the manufacturers’
instructions to use these instruments.
2. A battery-operated AC milliammeter. The Data
Precision 245 digital multimeter is suitable for this
job.
3. Measuring the voltage drop across a resistor by
means of a VOM or battery-operated AC volt-
meter. The ”limit” indication is 0.75V, so analog
meters must have an accurate low-voltage scale.
The Simpson 250 and Sanwa SH-63Trd are
examples of a passive VOM that is suitable. Nearly
all battery operated digital multimeters that have a
2V AC range are suitable. (See Fig. A)
To Exposed Metal
Parts on Set
AC
Voltmeter
(0.75V)
= Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
How to install CAM(A) and CAM(B)
When the CAM(A) and CAM(B) removed or replaced.
Make sure to install these cam’s (marked @ position) with
marked @ position of chassis as show in Fig. 1.
‘CAM(B)
Fig. 1. STOP POSITION
_ TEST MODE
Turned the power on after connect @ pin of IC801 to
ground. (shorted between 1 and 2 pin of TP801).There are
two type of the test can be done as show in below.
1. ALL LED LIGHT
ALL LED will light one second after the power on.
2. HIGH SPEED PLAYBACK MODE
Excutes high speed dubbing when the HIGH SPEED
button is pressed during normal speed mode of DECK-A
or DECK-B.

TC-W32/W290
SECTION 2 This section is extracted from
GENERAL instruction manual.
Identifying the Parts
Front Panel |
aq 6
| ll [9] (9 8] [7] [6]
*Remote control sensor
For details, refer to the page number indicated in
parenthesis.
POWER switch SYNCHRO DUBBING buttons (page 12)
Deck A HIGH SPEED button
Deck B NORM (normal) SPEED button
[4] TAPE COUNTER and reset button (deck B) 111] & (eject) button (deck A)
[5] Display panel HEADPHONES jack (stereo phone jack)
[6] REC (recording) LEVEL control (pages 9 and 10)
DOLBY NR (Dolby noise reduction) switch *Remote control sensor
(pages 7 and 9) You can remotely control this cassette deck with:
# (eject) button (deck B) — Aremote commander that came with a Sony amplifier or
[9] Tape operation buttons receiver if it has the lat mark and cassette deck control
@ (stop) button capability.
<4 (leftward fast winding) button — Any optional Sony remote commander with the tal mark
RB (play) bution - and cassette deck contro! capability.
>P (rightward fast winding) button
If PAUSE button (deck B only)
O REC MUTE (record muting) button (deck B only)
(page 11)
@ REC (recording) button (deck B only)

| TC-W32/W290
SECTION 3
ADJUSTMENTS
3-1. MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured alcohol-
moistened swab :
record/playback/erase head
rubber belts
idlers
pinch roller
capstan
2. Demagnetize the record/playback head with a head
demagnetizer.
(Head demagnetizer do not approach for the erase
head.)
3. Do not use a magnetized screwdriver for the adjust-
ment.
4. After the adjustments, apply suitable locking com-
pound to the parts adjusted.
5. The adjustments should be performed with the rated
power supply voltage unless otherwise noted.
Torque Measurement
30 to 70 g-cm
CQ-1026 | (0.42 - 0.97 oz-inch)
Forward 1.5 to 7 g-cm
back tension Nee (0.02 to 0.096 oz-inch)
less than 60 g-cm
dic pugohs vere (less than 0.83 oz-inch)
3-2. ELECTRICAL ADJUSTMENTS
PRECAUTION
1. The adjustment should be performed in the publication.
(Be sure to male playback adjustment at first.)
2. The adjustment and measurement should be performed
for both L-CH and R-CH.
* Switch position
DOLBY NR switch : OFF
¢ Standard record position :
Deliver the standard input signal level to input jack
and set the REC LEVEL control to obtain the
standard output signal level as follows.
—Record Mode—
AF OSC
3 attenuator 10k92
Ol f |
LINE IN
LINE OUT
Standard Input Level
input signal level 0.5V (—3.8dB)
Standard Output Level
load impedance 4ATk2
er
Test Tape
P-4-A100 | 10kHz, -10dB | Azimuth Adjustment
P-4-L300 | 315Hz, 0dB
WS-48B | 3kHz, 0dB
0dB=0.775V
Record/Playback Head Azimuth Adjustment
PB Level Adjustment
Tape Speed Adjustment
Porcedure :
1. Forward playback Mode
test tape
P-4-A100
(10kHz, —10dB)
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 1dB.
L-CH
peek output
levels
R-CH
Screw ? eak
position
L-CH R-CH angle
peak peak

TC-W32/W290 |
3. Playback Mode
test tape
P-4-A100
(10kHz, —10dB) L-CH oscilloscope
A7k2
QO@MO®QY
in phase 45° 90° 135° 180°
a
good wrong
4. Charge the reveres playback mode and repeat the steps
1 to 3.
5. After the adjustment, lock the adjustment screws with
suitable locking compound.
Adjustment Location: —record/playback head—
Adjustment screw
Tape Speed Adjustment
Procedure :
—Forward playback Mode—
test tape
WS-48B
(3kHz, 0dB)
f a
Perform high speed adjustment before normal speed
frequency counter
LINE OUT
adjustment.
<high speed adjustment )
1. Shorted the both terminal of the connector TP801 by
read wire to short between @ pin of IC801 and
Ground.
2. Set to FWD playback mode.
3. Keep on pressing the HIGH SPEED DUBBING switch.
4. Adjust RV601 so that the frequency counter reading
becomes 5,700 + 20Hz.
5. After adjustment, disconnect TP801 shorted in step 1.
«normal speed adjustment >
1. Set to FWD playback mode.
2. Adjust RV602 so that the frequency counter reading
becomes 3,000 + 10Hz.
Frequency difference between the beginning and the end
of the tape should be within 1.5%.
Frequency difference between deck A and deck B the
beginning of the tape should be within 1.5%.
Adjustment Location: AUDIO board
Playback Level Adjustment
Procedure :
—~Forward playback Mode—
test tape
P-4-L300
(315Hz, 0dB)
VTVM
LINE OUT
Adjust deck A (RV101/L-ch and RV201/R-ch), B (RV111
/L-ch and RV211/R-ch) so the VITVM reading becomes
the adjustment limits below.
Adjustment Value :
LINE OUT level : -7.7 + 0.5dB (0.301 to 0.338V)
Level difference between channels : within 0.5dB.
Confirm the LINE OUT level does not change in playback
mode while changing the mode from playback to stop
several times.
Adjustment Location : AUDIO board
— § —

Record Bias Adjustment (DECK-B only)
Setting :
REC LEVEL control: Standard record position (Refer to
page 5).
Procedure :
1. Record Mode
AF OSC
10k2
C3
attenuator
pf
CS-122
blank
tape
QLIG ol
i
|
Oooo
|
ae
eS
LINE IN
1) 315Hz -
By rons 31.6mV (—27.8dB)
2. Playback Mode
recorded
portion 47kQ
OH = b+i5
LINE OUT
Playback the signal recorded in step 1.
Confirm that the 10kHz playback output is 0 + 0.5dB
relative,to the 315Hz output. If necessary, adjust RV102
(L-ch), RV202 (R-ch) and repeat the steps given above.
Adjustment Location : AUDIO board
— Adjustment Parts Location Diagrams—
{AUDIO BOARD] (COMPONENT SIDE)
RV601 RV602 RV202 RV102
(HIGH) (NORMAL) (R-CH) (L-CH)
Soren so
TAPE SPEED RECORD BIAS
Adjustment Adjustment
Record Level Adjustment (DECK-B only)
Setting :
REC LEVEL control : Standard record position (Refer to
page 5).
Procedure :
1. Record Mode
AF OSC
10k2
7
attenuator
po
CS-122
blank
tape
SLI, ol
roots
|
>
aes |
LINE IN
315Hz, 31.6mV (—27.8dB)
2. Playback Mode
recorded
portion ATkQ
LINE OUT
Confirm playback the tape recorded become adjustment
level as follows.
If necessary, adjust RV103(L-ch), RV203(R-ch) and
repeat the step 1 and 2.
Adjustment Value :
LINE OUT level : —27.7 + 0.5dB (30.2 to 33.8mV)
Adjustment Location : AUDIO board
RV201(R-CH)] PLAYBACK LEVEL Adjustment
RV101(L-CH) (DECK-A)
RV211(R-CH)] PLAYBACK LEVEL Adjustment
RV111(L-CH) (DECK-B)
RV103(L-CH)
outed RECORD LEVEL Adjustment

SECTION 4
DIAGRAMS
4-1. BLOCK DIAGRAM
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