Sony TC-WA7ES User manual

__TG-WATES/WRO65/WR665S
SERVICE MANUAL
Photo : TC-WR665S
US Model
TC-WA7ES/WR565/WR665S
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Chinese Model
TC-WR565/WR665S
* 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 symbol D0 and “HX PRO” are trademarks | Tape Transport Machanism | DECK A
of Dolby Laboratories Licensing Corporation.
Model Name Using Similar Mechanism | TC-WR545/WR741
TC-WR565/WR665S :
TCM-190RA14CL
TC-WAT7ES : |
TCM-190RA12CL
DECK B | TCM-190RB12CL
SPECIFICATIONS
System
Recording system
4-track 2-channel stereo
Fast-winding time (approx.)
90 sec. (with Sony C-60 cassette)
Bias AC bias
Singnal-to-noise ratio (at peak level and weighted with Dolby NR off)
Type I tape, Sony Type I (NORMAL): 55 dB
Type IL tape, Sony Type II (HIGH) : 57 dB
Type IV tape, Sony Type IV (METAL) : 58 dB
S/N ratio improvement (approximate values)
With Dolby B NR on: 5dB at 1kHz, 10dB at 5kHz
With Dolby C NR on: 15dB at 500Hz, 20dB at 1kHz
With Dolby S NR on (TC-WA7ES/WR665SS only) :
10dB at 100Hz, 24dB at 1kHz
Harmonic distortion
0.4% (with Type I tape, Sony Type I (NORMAL) :
160 nWb/m 315 Hz, 3rd H.D.)
1.8% (with Type IV tape, Sony Type IV (METAL) :
250 nWb/m 315 Hz, 3rd H.D.)
Frequency response (Dolby NR off)
Type I tape, Sony Type I (NORMAL):
30-15,000Hz ( + 3dB, IEC)
Type II tape, Sony Type II (HIGH) :
30-17,000Hz ( + 3dB, IEC)
Type IV tape, Sony Type IV (METAL) :
30-18,000Hz ( + 3dB, IEC)
30-13,000Hz ( + 3dB, — 4dB recording)
Wow and flutter
TC-WA7ES/WR665S : + 0.13% W. Peak (IEC)
0.07% W. RMS (NAB)
+ 0.18% W. Peak (DIN)
+ 0.14% W. Peak (IEC)
0.08% W. RMS (NAB)
+ 0.19% W. Peak (DIN)
Variable pitch range (approx.)
— 30 to +30%
TC-WRS65 :
Inputs
Line inputs (phono jacks)
Sensitivity : 0.16V
Input inpedance : 47 kilohms
Outputs
Line outputs (phono jacks)
Rated output level : 0.5V at a load impeadance of
47 kilohms
Load impedance : Over 10 kilohms
Headphones (stereo phone jack)
Output level : ImW at a load impedance of 32 ohms
STEREO CASSETTE DECK
SONY.

General
Power requirements
TABLE OF CONTENTS
| US, Canadian model _| Canadian model 1 120V AC,60Hz AC, 60Hz Sensual ;
AEP, UK, German, PECIFICALIONS *srsrttr etc te tees eetee eee een teen eenee ene aeeeneeteeeeaeeenes
Serta are ce tae te Wo
|
1. GENERAL
1-1. Identifying the Parts Pte ener n amma m cence reese eeesnesaresareeees 4
Power consumption
_ 26W 2. DISASSEMBLY
Dimensions (approx) (w/h/d) D1. EeGint PARE iiss iaeeiiaodas uk aswaup uaa taeninnteatiban omntaees 5
Model for U.K. and Australian : 35 <Naechiatiisin: Peele ses ise secs aoe waded See shat Geena hess 5
430x 123 *300mm (w/h/ qd) 2-3. Capstan Motor, Reel Motor v+r+tesssseessseseeeeseteeeneeeees 6
(17x 47% x 11% inches) Sat Pent Pinch Rolle sien ne ele eae 6
Model for other countries : ; :
430X123 X290mm (w/h/d)
(17x 47% x 11'A inches) 3. ADJUSTMENTS ~
including projecting parts and controls 3-1, Mechanical Adjustments eee ccc c cen serncneneeeenssesevevecerees 7
Mass (Approx.) 3.2. Blectrical Adjustments Peeve rece rere rere nee neseeeneneererseees 7
4.5kg (9Ibs 150z)
Supplied accessories 4. EXPLANATION OF IC TERMINALS -:-+++++-++-+-0+++ ++ 11
Audio connecting cords (2 phono plug-2 phone plugs) (2)
Optional accessory 5. DIAGRAMS
Remote commander RM-J902 5-1. Block Diagrams :::++tssstesssssessseeessseneeserseeeseeereenes 13
es: . 5-2. Printed Wiring Boards (System Control Section)-:--+:: 17
Design and specifications are subject to change without notice. 5-3. Schematic Diagram (System Control Section)+++++++++« 4
5-4. Schematic Diagram (Audio Section) s++t+rrterrreeter sees 27
5-5. Printed Wiring Boards (Audio Section)-++++++rrrtsreres 31
5-6. Printed Wiring Boards (Dolby (S) Section) :+++++++-++++- 34
5-7. Schematic Diagram (Dolby (S) Section) sorrrretrtereee 34
6. EXPLODED VIEWS
G2). Chassis Sections torsion Aeeananeessees yenernavseneehigieteniecs 37
672: Front Panel Section: sth ee std srentaiecesstascereseedstea 39
6-3. Mechanism Section. | <1.0+407serss esse eeanseuese a satanetves 40
6-4: Mechanism Section 2 ican aarti wl asceseaiinciisanewes 4]
7. ELECTRICAL PARTS LIST «---::-scccsseceresssecsececeesenes 42
MODEL IDENTIFICATION
(Specification Label)
SONY alike
8 MODELND. YY“YYW/ TC-WR665S
TC-WA7ES
US, Canadian model
UK model
Australian model
AEP, German model
E model
Chinese model
STEREO CASSETTE DECK
WML
: AC 120V 60Hz
: AC 240V 50Hz
: AC 240V~50/60Hz
: AC 220-230V~50/60Hz
:AC120, 220, 240V~50/60Hz
: AC 220 — 230V~50/60Hz
—)?—

SAFETY
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 meta! part to
earth ground and from all exposed metal parts to any
exposed metal part having a return to chassis, must
not exceed 0.5mA (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 instru-
ments.
2. <A battery-operated AC milliammeter. The Data
Precision 245 digital multimeter is suitable for
this job.
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.
CHECK-OUT
3. Measuring the voltage drop across a resistor by
means of a VOM or battery-operated AC volt-
meter. The “limit” indication is 0.75 V, 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
ae (0.75 V)
== Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
ATTENTION AU COMPOSANT AYANT RAPPORT
A LA SECURITE!
LES COMPOSANTS IDENTIFIES PAR UNE MARQUE /\
SUR LES DIAGRAMMES SCHEMATIQUES ET LA LISTE
DES PIECES SONT CRITIQUES POUR LA SECURITE
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS QUE PAR DES PIECES SONY DONT LES
NUMEROS SONT DONNES DANS CE MANUEL OU
DANS LES SUPPLEMENTS PUBLIES PAR SONY.

SECTION 1
GENERAL
1-1. IDENTIFYING THE PARTS
FRONT PANEL
POWER switch
[2] Deck A
RMS “operation buttons
RMS/START buttons
SET buttons
CHECK buttons
DISPLAY buttons
COUNTER buttons (deck A)
RESET button
MEMORY button (TC-WA7ES/WR665S only)
Display panel
[6] AUTO CAL button
COUNTER buttons (deck B)
RESET button
MEMORY button (TC-WA7ES/WR665S only)
SYNCHRO DUBBING buttons
HIGH button
NORMAL button
[9] REC (recording) LEVEL control
BALANCE control
Deck B
& (eject) button (deck B)
PHONES jack (stereo phone jack)
Tape operation buttons
<4 (leftward fastwinding /AMS ~/
RMS” — button
pp (rightward fastwinding)/AMS ~ /
RMS” +button
i (stop)/((RMS~) CLEAR button
<<](reverse play)/(RMS” ) BACK
button
Ce (forward play)/(RMS™) FRONT
button
If! PAUSE button
© REC MUTE (record muting) button
@ REC (record muting) button
DOLBY NR switches
OFF/ON/FILTER ON switch
B/C/S switch
DIR (direction) MODE switch
PITCH control
& (eject) button (deck A)
“Random Music Sensor
™ Automatic Music Sensor

SECTION 2
DISASSEMBLY 2-3. CAPSTAN MOTOR, REEL MOTOR
Note : Follow the disassembly procedure in the numerical order given. @ +PTPWH2 x 23
CASE
Unscrew the four case attachment screws M3 X 8 and
remove
the
case.
@
Fitting
base
2-1.
FRONT
PANEL
E model only
FRONTPANEL @-®©@
When installing, pull the FR belt
VOLTAGE SELEcToR f— [ AG ]
capstan belt and put and put around claws.
When installing, pull _
around claws.
VOLTAGE
SELECTOR
@ Remove the flat cable. —
© Remove the front Panel
@ claw @ Connectors
@ Capstan motor M1 (DECK A)
M1 (DECK B)
Ground plate
@ Remove the flat cable.
@ AUDIO board (DECK A)
@ +82.6x3
AUDIO board (DECK B)
2-2. MECHANISM DECK
@ Press the EJECT button. @ Reel motor M2 (DECK A)
M2 (DECK B)
Remove the cassette holder
Belt (FR)
© +P2.6 x 2.8
2-4. HEAD, PINCH ROLLER
@ Cassette lid
© BVTP26 x8
1) Claw
1 eg
‘J @ Head base assy
HP101(DECK A)
HRPE101(DECK B)
@ Mechanism deck
@ BVTP2.6 x 8
@ Lever (pinch lever REV) assy @ Lever (pinch lever FWD) assy

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
2.
Demagnetize
the
record/playback
head
with
a
head
demagnetizer.
3. Do not use a magnetized screwdriver for the adjustment.
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.
pinch roller
capstan
Torque Measurement
Meter reading
30 to 65g «cm
CQ-102C
(0.42
to
0.9
oz
*
inch)
DECK A: 1 to 6g * cm
(0.014 to 0.083 oz * inch)
CQ-102C
DECK B : 2 to 9g * cm
(0.03 to 0.12 oz * inch)
30 to 65g * cm
Reverse
back
CQ-102RC
(0.014
to
0.083
oz
*
inch)
70 to 120g*cm
FF/REW
CQ-201B
(0.98
to
1.66
ozeinch)
tension
3-2. ELECTRICAL ADJUSTMENTS
Forward
back
tension
1 to 6g *cm
PRECAUTION
1. The adjustment should be performed in the publication.
(Be sure to male playback adjustment at first.)
2. The adjustments and measurement should be performed for both
L-CH and R-CH.
® Switch position
DOLBY NR switch : OFF
DIR MODE switch —
@ 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
a,
fe)
attenuator 10k Q
LINE OUT
LINE IN
Standard Input Level
Input terminal LINE IN
input signal level 0.5V ( — 3.8dB)
Standard Output Level
Output terminal LINE OUT
output signal level 0.5V ( — 3.8dB)
Test Tape
P-4-A100
P-4-L300
WS-48B
Test Mode
1. Insert a short-circuit plug into TP801 (2P) and turn ON the
power switch.
At
first,
all
the
fluorescent
tubes
light
up,
then
the
system
returns
to normal display. (However, “0000” is not displayed on the
counter.)
2. To release the test mode, remove the short plug and turn off the
power switch.
3. Remove the short plug after completion of adjustment.
10kHz, — 10dB
315Hz, 0dB
3kHz, 0dB
Azimuth Adjustment
PB Level Adjustment
Tape Speed Adjustment
Record/Playback Head Azimuth Adjustment
Procedure :
1. Forward playback Mode
test tape
P-4-A100
(10kHz, — 10qB)
VIVM
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
peak
within
1dB within
—t screw position
position L-

3. Playback Mode
test tape
P-4-A100
(10kHz, — 10dB)
oscilloscope
4. Change 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 —
reverse side
forward side
adjustment screws
Tape Speed Adjustment
Procedure :
— Forward Playback Mode —
test tape
WS-48B
(3kHz, OdB)
p=
LINE OUT
(High speed adjustment)
1. Set to test mode. (Refer to page 7)
2. Set to FWD playback mode.
3. Keep on pressing the HIGH SPEED DUBBING switch.
4, Adjust RV72 so that the frequency counter reading becomes
6,000 + 20Hz.
5. Release test mode after adjustment is completed.
(Normal speed adjustment)
1. Set to FWD playback mode.
2. Adjust RV71 so that the frequency counter reading becomes
3,000 + 10Hz.
(Pitch control adjustment) (TC-WR565, TC-WR665S)
1. Turn ON the PITCH CONTROL switch.
2. Set RV801 to mechanical center.
3. Set to FWD playback mode.
4. Adjust RV802 so that the frequency counter reading becomes
3,000 + 10Hz.
Frequency difference between the beginning and the end of the tape
- should be within 3%.
Frequency difference between the deck A and deck B the beginning
of the tape should be within 1.5%.
Adjustment Location : AUDIO board, CONNECTOR board.
(See page 10)
Playback Level Adjustment
Procedure :
— Forward Playback Mode —
test tape
P-4-L300
(315Hz, OdB)
LINE OUT
Adjust RV11(L-CH) and RV21(R-CH) so the VTVM 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. (See page 10)
— § —

Bias Consumption Current Adjustment
This adjustment should be performed when replacing the head assy
or the bias oscillating transformer (T81, T91).
Procedure :
( ): R-CH
digital
blank
tape
voltmeter
CS-413
no signal
1. Connect the digital voltmeter to test point TP81.
2. Set RV81 (RV91) to mechanical center.
3. Set to FWD record mode.
4, Adjust T81 (T91) so that the digital voltmeter reading becomes
minimum.
Adjustment Value : Maximum 220mV
Adjustment Location : AUDIO board. (See page 10)
Record Bias Adjustment
Setting :
REC LEVEL control : standard record position (Refer to page 7.)
Procedure :
1. Record Mode
AF OSC
blank tape
y 2 CS-123
o—o r
H set ——
LINE IN
Wot Sne } 50.1mV ( - 23.8dB)
2) 10KHz
2. Playback Mode
recorded
portion
=
Confirm that the 10kHz playback output is 0 + 0.5dB relative to the
315Hz output. If necessary, adjust RV81 (L-CH), RV91(R-CH)
and repeat the steps given above.
Adjustment Location : AUDIO board. (See page 10)
Record Level Adjustment
Setting :
REC LEVEL control : standard record position (Refer to page 7.)
Procedure :
1. Record Mode
AF OSC
blank tape
ae ra CS-123
(e)
o—o .
5 :
Oo-—0 "
315HZ 50.1mV ( — 23.8dB)
2. Playback Mode
recorded VITVM
portion
ie
Confirm playback the tape recorded become adjustment level as
follows.
If necessary, adjust RV101(L-CH), RV201(R-CH) and repeat the
steps | and 2.
Adjustment Value :
LINE OUT level : — 23.8 + 0.5dB (47.2 to 53mV)
Adjustment Location : SYSTEM CONTROL board.
(See page 10)

— Adjustment Parts Location Diagrams —
{SYSTEM CONTROL BOARD]
Record Level
Cl ere
(R) (L)
AV201 RVIO1
DECK-A :
(AUDIO BOARD]
RV72 (HIGH)
Tape speed
RV71 (NORMAL).
BELA) Playback
RVI11 (L) Level
DECK-B : DECK-B :
(AUDIO
BOARD)
{CONNECTOR
BOARD)
Bias Consumption Current
Record Bias
(R) (Lt)
RV91 RV8I
CNP801
Pitch control RV802
RV72 (HIGH)
- Tape speed
RV71 (NORMAL)
Terie) Bias Consumption
T91 (R) Current
Playback
Level
RV2t (R)
RVi1 (L)

SECTION 4
EXPLANATION OF IC TERMINALS
Test mode terminal. “L” : Test mode, “H” : Normal mode
Sircs signal in terminal.
Power OFF. OFF = 0V
Normal/High selector for equalizer.
Playback A/B selector. “L”:DECK-A, “H”: DECK-B
IC801 CXP82316-053Q
/0
TEST
SIRCS
POWER IN
SPEED H/L
>|
NRI Dolby NR control.
NRO Dolby NR control.
MODEO
MODEI1
BC/S
LIN MUTE
IC MUTE
REALY REC/PB
REC CALO
REC CALI
EQ CALO
EQ CALI
BIAS
POWER OUT
METAL (B)
70 ue (B)
A/D CTRLO
A/D CTRLI
A/D INO
A/D INI
S. REEL (A)
S. REEL (B)
AMS IN
AMS/BS
RESET
EXTAL
XTAL
Dolby NR mode control. oe
Dolby NR mode control.
Dolby NR type selector. “L”:DolbyB,C, “H”: Dolby S
Line mute ON/OFF. “L”:ON
Meter mute. “H” : ON
Recording/Playback selector at DECK-B. “L” : Recording
Recording calibration. “H”:ON
Recording calibration. “H”: ON
i
:
AMS/BS selector. “L”: BS ON
i
EQ Bias calibration terminal.
Recording mute ON/OFF. “L” : ON
OSC ON/OFF control. “H”: OFF
OSC H/L control terminal.
1
—
— a oe
2
13
—
im
_
nN
6
7
—
i
2 oO
22
Ze
4
paar
iW)
26
os
dO co
NA
29
DW] Ww m1 oO
W &
BIAS CALO
BAIS CALI
BAIS CAL2
BAIS CAL3
REC MUTE
OSC ON/OFF
OSC H/L
wn n
ele|s 3
1eN) nN
Wt OO
ON
BY
8
9 W
bh [o)