Technics RS-B14 User manual

Dolby
В»
С
NR-Equipped
ORDER NO. HAD84052768C1
Service Manual
Cassette Deck
RS-B14
Stereo Cassette Deck
DC poer ecc wn]
RS-636 MECHANISM SERIES
Specifications
Deck system:
Track system:
Heads:
REC/PLAY;
Erasing;
Motor:
Recording system:
Bias frequency:
Erasing system
Tape speed:
Frequency response:
Metal;
CrO;;
Normal;
S/N:
Stereo cassette deck
4-track, 2-channel
MX head
Double-gap ferrite head
1 motor system
AC bias
80 kHz
AC bias
4.8 cm/sec.
20 Hz~17 kHz
40 Hz—16 kHz 3 dB
20 Hz~17 kHz
40 Hz~15 kHz X3 dB
20 Hz—16 kHz
40 Hz~14 kHz +3 dB
(Signal level=max recording
level, CrOz type tape)
Dolby C NR in;
Dolby B NR in;
NR out;
75 dB (CCIR)
67 dB(CCIR) :
57 dB (A weighted)
Design and specifications are subject to change without notice.
* Dolby' and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation.
Technics
Matsushita Engineering and
Service Company
50 Meadowland Parkway,
Secaucus. New Jersey 07094
Color
| (K)...Black Type
(S)...Silver Type
Area
usd U.S.A.
[C]...... Canada.
Wow and flutter:
Fast Forward and
Rewind Time:
Input sensitivity
and impedance:
MIC;
LINE;
Output voltage
and impedance:
LINE;
HEADPHONES;
Power consumption:
Power supply:
Dimensions
(WXHXD):
Weight
Matsushita Electric
Panasonic Hawaii Inc.
91-238 Kauhi St. Ewa Beach
P.O. Box 774
Honolulu, Hawaii 96808-0774
0.0796 (WRMS)
Approx. 110 seconds with C-60 cassette
tape
0.25 mV/4000-—10 КО
70 mV/47 КО
400 mV/1.8 КО
80 mV/8 Q
11W
AC 50 Hz/60 Hz, 120 V
430x108x220 mm
(1629/52" x 48/32" x 92152")
3.1 kg (6 Ibs. 13 02.)
Panasonic Sales Company,
of Puerto Rico, Inc.
Ave, 65 De Infanteria, KM 9.7
Victoria Industrial Park
Carolina, Puerto Rico 00630
of Canada Limited
5770 Ambler Drive, Mississauga,
Ontario, LAW 2T3
Division of Matsushita Electric

Ш CONTENTS
ITEM PAGE
* Location of Controls and Components ......... 2
© Safety Ргесашйіопв5.................................... 3
е Insulation Resistance Test ........................ 3
е Disassembly Instructions ........................... 3
* Measurement and Adjustment Methods ......... 5
е Block Піадгат........................................ 10
• Schematic Diagram ................................. 12
ITEM
* Electrical Parts List .................................
е Circuit Boards and Wiring Connection
Оіадгатї: «susce etium rese Deme sa S eri des
* Mechanical Parts Location
(included Parts List) ...........................
* Cabinet Parts Location (included Cabinet,
Accessories and Packing Parts List) ......
Ш LOCATION OF CONTROLS AND COMPONENTS
(D Power Switch
[power (Ж off • = on)]
Recording Indicator
[rec]
4% Cassette Holder
47 Tape Counter and Reset Button [tape counter - reset]
Input Level Control [input level)
@ Dolby NR Switch [Dolby NR (ЖШ out • = in)]
(5) FL (fluorescent level) Meters
|
e 44 Balance
xl © © | Control
2
Eject
|
ӨТ
[||
[Ба!апсе
Виїїоп — © © © (left «
ecr
A
oat
;
г
center.
[eject
(4)]
[eTel
ше
right)]
@ Record Button
[rec- © (9)]
(4) Play Button [play-
(8)
Stop
Button
[stop
"uM
5
(>))
(6) Rewind/Review Button
[rew/rev (44))
@ Tape Selector
13 Microphone Jacks
[tape
select
[mic
(left
»
right)]
(Normal
•
CrO;-
(2
Headphones
Jack
[phones]
Metal)]
17
Input
Selector
Pause
Button
[input
select
(Ж
line-
=
mic)]
[pause
(11)]
Dolby
NR
Select
Switch
“-(7)
Fast
Forward/Cue
[Dolby
NR
(IR
[E]
«
—
(hj
Button [ff/cue (PP )]
7/09 Line Input Jacks [LINE IN (L-R)]
7 À Line Output Jacks [LINE OUT (L -R)]

Ш SAFETY PRECAUTIONS (For U.S.A.)
. Before servicing, unplug the power cord to prevent an electric shock.
.
When
replacing
parts,
use
only
manufacturer's
recommended
components
for
safety.
. Check the condition of the power cord. Replace if wear or damage is evident.
. After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields,
etc.
Aa WPM —
5. Before returning the serviced equipment to the customer, be sure to make the following insulation
resistance test to prevent the customer from being exposed to a shock hazard.
Ш INSULATION RESISTANCE TEST (For U.S.A.)
1. Unplug the power cord and short the two prongs of the plug with a jumper wire.
2. Turn on the power switch.
3. Measure the resistance value with ohmmeter between the jumpered AC plug and each exposed
metal cabinet part, such as screwheads, antenna, control shafts, handle brackets, etc. Equipment
with antenna terminals should read between 3MQ and 5.2M to all exposed parts. (Fig. 1)
Equipment without antenna terminals should read approximately infinity to all exposed parts.
(Fig. 2)
* Note: Some exposed parts may be isolated from the chassis by design. These will read infinity.
Antenna
terminal
Exposed Exposed
metal metal
part part
Ohmmeter d jussis
Fig. 1 Fig. 2
Resistance = 3M2—5.2M& Resistance = Approx оо
4. If the measurement is outside the specified limits, there is a possibility of a shock hazard. The
equipment should be repaired and rechecked before it is returned to the customer.
Ш DISASSEMBLY INSTRUCTIONS
The head azimuth can be
adjusted by removing the
cassette lid.

AC power transformer Main circuit Record/playback
circuit board (о) board changing wire
| \ 0 (К)
(0) How їо remove flat cable
Flat cable White line Open the lid of connector in the
direction of the arrow as shown
left-hand, and extract the flat
cable to disconnect.
Connector
(Flat cable connector)
FL meter
circuit board
Power switch circuit board (C)
Fig. 3
I
1
(9 1-Clamper (N)
|
1
Motor assembly
Volume circuit board
Fig. 6 Fig. 7
Shown in
Ref. No. Procedure To remove —. Remove —. fig. —
Case cover SB SCIOWS uestis ener ento sa P ue ER due (A) 1
* As shown in fig. 6, raise the clampers in
PDF the direction of arrow @ and remove
2 LED «аин баата the LED circuit board іп the direction S
of arrow® .
9 38СТӨМе eux dan exti иии ушу залы eda қада юшде da ag (B) 2
3 1-2-3 а ie e Pull out the connectors [А] [B]. ............... (С) 3
* How to remove flat cable [C] [D] F] ......... (D) | 3
--4--

| RS-B14 |
Іш 2 Procedure To remove —. Remove —. ps in
* Push the eject button ........................... (E) 1
9.2 о СТУС езара Yon once i ep NU uS rd (F) 2
92 SCIOWS: aus sis teria cie vel; 2 oi ware es one adie арқар (G) 5
қ ; Remove the counter Беії........................ (H) 5
4 1-4 M :
echamsm umit * Pull out the connectors [A] [B] ............... (C) 3
* As shown in fig. 3, remove the record/
playback changing wire in the direction 3
of arrow (3).
Г ST STEW еа Г ЛУГ ГКК Г Г mae and (J) 3
©“ SGEOW аы ал нен дббн дублі а qu (К) 3
* As shown in fig. 3, remove the record/
playback changing wire in the direction 3
5 1-2-5 Main circuit board * of arrow (8) .
* When measuring and adjusting, set the
main P.C.B. as shown in Fig. 4. 4
Then, connect the ground of main P.C.B.
and the bottom case with a wire.
6 1-6 EL meter circuit board * How to remove flat cable [D] .................. (D) 3
% 2156ГЕ: mens mue cec scia anus ur m à sae DR dd (P) 5
* How to remove flat cable [C] .................. (D)
* As shown in fig. 6, raise the clampers іп
7 1-6-7 Volume circuit board the direction of arrow (1) and remove 6
the volume circuit board in the direction
of arrow (2).
8 1—8 Power supply circuit € DISGEOIMS.- : Haies hassan жай arius кке жеміне (L) 3
board * How to remove flat cable [E] fF] ............... (D) 3
9 1-9 Power switch circuit © 2:ISGIOWS. sam eme dr eas Soe uae ісігін quos mse à (M) 3
board * How to remove flat cable [F] .................. (D) 3
OISCIBWS. Sans зы ес ыс ылы ына (М) 7
10 1-4- й
| 18 Maier assembly е 2'SGIOWS: ulis suu tke ааа адас teet à (O) 7
ж When adjusting in record mode, fix the rec/play switch (51) on the main P.C.B. at “гес” by use of a clip or the like.
Ш MEASUREMENT AND ADJUSTMENT METHODS
NOTES:
e Before making the adjustment and measurement, be sure to read
“Ref. No. 4: to remove main circuit board” of “DISASSEMBLY INSTRUCTION”.
Tape speed adjustment VR
Jumper wire for
erase current adjustment (J118)
A = ELE
VR10 Ф CLEA
|
mi
уво
22}
тра
**7—TP3
2 c VR2—qG&
ibs Е aie
| d |
Fig. 1

RS-B14
NOTES:
Set
switches
and
controls
in
the
following
positions,
unless
otherwise
specified.
*
Make
sure
heads
are
clean
*
Tape
selector:
Normal
*
Make
sure
capstan
and
pinch
roller
are
clean
*
Input
selector:
Line
in
e
Judgeable
room
temperature
20+5°C
(68+9°F)
*
Input
level
controls:
Maximum
*
NR
switch:
OUT
*
Balance
control:
Center
Q Head azimuth Condition: Equipment:
adjustment * Playback mode • VTVM
е Normal tape mode * Oscilloscope
* Test tape (azimuth)...QZZCFM
L-CH/R-CH
output
balance
adjustment
терта
1.
Make
connections
as
shown
іп
fig.
2.
Reon
/
са
a
қаулай
ый
EA
[c
Ro
“ker
Playback mode VTVM Oscilloscope
. Playback the 8kHz signal from the test tape (QZZCFM). Fig. 2
Adjust screw (B) in fig. 3 for maximum output L-CH and R-CH levels. Ig.
When the output levels of L-CH and R-CH are not at maximum at the c Record/playback
same point adjust as follows. ee ngad
. Turn screw (B) shown in fig. 3 to find angles A and C (points where /
peak output levels for left and right channels are obtained). Then, A
locate angle B between angles A and C, i.e., point where L-CH and Screw (8)
R-CH outputs are balanced. (Refer to figs. 3 and 4.) Fig. 3
L-ch peak level R-ch peak level
1 Ж
ГА
L-CH/R-CH
phase
adjustment
LEVEL
|
4. Make connections as shown in fig. 5.
5. Playback the 8kHz signal from the test tape (QZZCFM).
Adjust screw (B) shown in fig. 3 so that pointers of the two VTVMs
swing to maximum and a lissajous waveform as illustrated in fig. 6 is
obtained on the oscilloscope.
Record/ Oscilloscope
playback head
Playback
D
mode LINE OUT
Vertical Horizontal
Fig. 6
Fig. 5 g
Ө Tape speed Condition: Equipment:
* Playback mode * Digital frequency counter
* Test tape... QZZCWAT
Tape
speed
accuracy
Record/
playback
LINE
OUT
head
.
Test
equipment
connection
is
shown
in
fig.
7.
о
.
Playback
test
tape
(QZZCWAT
3,000Н2),
and
supply
playback
signal
о
at
to
the
digital
frequency
counter.
Playpack
те
на
тТаШЕНЕ
conni
. Measure this frequency.
.
On
the
basis
of
3,000Hz,
determine
value
by
following
formula:
Fig.
7
Tape speed accuracy = TOO 100(%) where, f = measured value
. Take measurement at middle section of tape.
Standard value: «1.596
. If measured value is not within the standard value, adjust it by using the tape speed adjustment VR shown in
fig. 1.
Note: Please use non metal type screwdriver when you adjust tape speed accuracy on this unit.
Tape speed fluctuation
Make
measurements
in
same
manner
as
above
(beginning,
middle
and
end
of
tape),
and
determine
the
difference between maximum and minimum values and calculate as follows:
f,-f
Tape
speed
fluctuation
=
3.000
х100(%)
fi
=
maximum
value,
f,
=
minimum
value
Standard value: Less than 1%

RS-B14
©
Playback
frequency
Condition:
Equipment:
response
*
Playback
mode
*
VTVM
*
Normal
tape
mode
*
Oscilloscope
* Test tape...QZZCFM
1. Test equipment connection is shown in fig. 2.
2.
Playback
the
frequency
response
portion
of
test
tape
|
Playback
frequency
response
chart
(022СЕМ):
3.
Measure
output
level
at
315Hz,
12.5kHz,
8kHz,
4kHz,
1kHz,
amt
ШЕШІНЕ
ne
250Hz,
125Hz
and
63Hz,
and
compare
each
output
level
ІШ;
ИСЕН
9%
ul
with the standard frequency 315Hz, at LINE OUT.
4.
Make
measurements
for
both
channels.
ИН
СШ
5.
Make
sure
that
the
measured
values
are
within
the
range
|
-
=
=
ag
specified
in
the
frequency
response
chart.
(Shown
in
fig.
8).
ШІ
ao
ІШ
Sat
=
63H H н: H2 н: н: z
Fig. 8
© Playback gain Condition: Equipment:
* Playback mode * VTVM
* Normal tape mode * Oscilloscope
* Test tape...QZZCFM
1. Test equipment connection is shown in fig. 2.
2. Playback standard recording level portion on test tape (QZZCFM 315Hz) and, using VTVM, measure the
output level at LINE OUT.
3. Make measurements for both channels.
[ Standard value: 0.4V+1dB |
гар.
.
If
the
measured
value
is
not
within
the
standard,
adjust
VR1
(L-CH)
or
VR2
(R-CH)
(See
fig.
1).
B After
adjustment,
check
"Playback
frequency
response"
again.
@ Erase current Condition: Equipment:
* Record mode • VTVM
* Metal tape mode * Oscilloscope
Erase head
. Test equipment connection is shown in fig. 9.
. Place UNIT into metal tape mode.
. Press the record and pause buttons.
. Read voltage on VTVM and calculate erase current by following
formula:
AON-
Record mode
R84 (12
Voltage across resistor R84 Fe
1 (Q)
Standard value: 155+15mA (Metal)
Erase current (A) =
5. If the measured value is not within the standard value adjust it by
following the adjustment instructions.
Adjustment
* |f the erase current is more than 170mA, cut the jumper wire (See fig. 1).

@ Overall frequency Condition: Equipment:
response
*
Record/playback
mode
*
VTVM
*
Test
tape
*
Normal
tape
mode
*
ATT
(reference
blank
tape)
e
CrO,
tape
mode
*
AF
oscillator
...
QZZCRA
for
Normal
*
Metal
tape
mode
*
Oscilloscope
...QZZCRX
for
CrO,
* Input level controls... MAX • Resistor (6009) ...QZZCRZ for Metal
Note:
Before measuring and adjusting, the overall frequency
response make sure of the playback frequency response (For
the method of measurement, please refer to the playback fre-
quency response).
Overall frequency response chart (Normal)
(Recording equalizer is fixed)
1. Make connections as shown in fig. 11.
2. Place UNIT into normal tape mode and insert the normal
reference
blank
test
tape
(QZZCRA).
SO
үм
Жш 5ш
кш
Ж
We
100?
3. Supply а 1kHz signal from the AF oscillator through ATT to
LINE
IN.
-
i
K
4. Adjust АТТ so that input level is -20dB below standard Р | i
5
recording level (standard recording level =0 VU).
. Adjust the AF oscillator frequency to 1kHz, 50Hz, 100Hz,
200 Hz, 500Hz, 4kHz, 8kHz and 10kHz signals, and record ув? (L-CH) |
these signals on the test tape. VRB (R-CH) 0 lj
. Playback the signals recorded in step 5, and check if the = Ó
frequency response curve is within the limits shown in the
overall frequency response chart for normal tapes (fig. 10).
(If the curve is within the charted specifications, proceed to
steps 7, 8 and 9.)
If the curve is not within the charted specifications, adjust p ella Утум. pM d
as follows; v б For overal frequency
VTVM Oscilloscope response measurement
For bias voltage
measurement
Fig. 11
Adjustment (A): Adjustment (B): b
When the curve exceeds the TD When the curve falis below
overall specified frequency : Le the overall specified fre-
response chart (fig. 10) as Hi quency response chart (fig.
shown in fig. 12. == ® 10) as shown in fig. 13.
1) Increase bias current by = р | 1) Reduce bias current by
turning VR7 (L-CH) and turning VR7 (L-CH) and ==
VR8 (R-CH). 7 УВВ (R-CH). а ЕЗИ
(See fig. 1 оп page 6.) pe QUK Repeat steps 5 and 6 for EE WM
2) Repeat steps 5 and 6 for SkHz 7kHz 8kHz confirmation (Proceed to 6 kHz 7ана ван:
confirmation (Proceed to Fig. 12 steps 7, 8 and 9 if the Fig. 13
steps 7, 8 and 9 if the curve is now within the | ;
curve is now within the charted specifications (
charted specifications as shown fig. 10.) as shown fig. 10.)
3) If the curve still exceeds the specifications (fig. If the curve still falls below the charted specifica-
10), increase bias current further and repeat tions (fig. 10), reduce bias current further and
steps 5 and 6. repeat steps 5 and 6.
7. Place UNIT into CrO, tape mode.
8. Change test tape to CrO, reference blank test tape} Overall frequency response chart (CrO,, Metal)
(QZZCRX), and record 1kHz, 50Hz, 100Hz, 200Hz, 500Hz,
4kHz, 8kHz, 10kHz and 12.5kHz signals. Then, playback
the signals and check if the curve is within the limits shown
in the overall frequency response chart for CrO, tapes (fig.
14).
. Place UNIT into metal tape mode and change test tape to
metal reference blank test tape (QZZCRZ), and record
1kHz, 50Hz, 100 Hz, 200Hz, 500Hz, 4kHz, 8kHz, 10kHz and
12.5kHz signals. Then, playback the signals and check if
the curve is within the limits shown in the overall frequency
response chart for metal tapes (fig. 14).
. Confirm that bias voltage are approximately as follows
when the UNIT is set at different tape mode.
* Measure the voltage across the head using a VTVM.
50H: 100H2 2008: 500Hz ]KHz 2кн2 ані
around 6.2V (Normal position)
Reference value: around 8.9V (CrO, position)
around 15.7V (Metal position)

i
|
RS-B14
|
©
Overall
gain
Condition:
Equipment:
е
Record/playback
mode
*
VTVM
*
AF
oscillator
*
Normal
tape
mode
*
ATT
*
Oscilloscope
*
Input
level
controls...
MAX
*
Resistor
(6009)
J
*
Standard
input
level;
*
Test
tape
МІС
...............
-72%3ав
(reference
blank
tape)
... QZZCRA for Normal
.
Test
equipment
connection
is
shown
іп
fig.
15.
Record/playback
1
2.
Insert
the
normal
reference
blank
tape
(QZZCRA).
ғи
3.
Place
UNIT
into
record
mode.
а
Bx:
4.
Supply
а
1kHz
signal
through
ATT
(-24dB)
from
AF
oscillator,
to
LINE
RE
TT
TS
IN.
oscillator
(BEER
Record
mode
5.
Adjust
ATT
until
monitor
level
at
LINE
OUT
becomes
0.4V+1
dB.
Қайы
6.
Playback
recorded
tape,
and
make
sure
that
the
output
level
at
LINE
—
*"«/Patex
OUT
becomes
0.4V+1dB.
=]
|
7.
If
measured
value
is
not
0.4V+1dB,
adjust
it
by
using
VR5
(L-CH)
or
S
E|
>
i
VR6
(R-CH).
Playback
mode
—
VIVM
Oscilloscope
8.
Repeat
from
step
(2).
Test
tape
Fig. 15
Q
Fluorescent
meter
Condition:
Equipment:
*
Record
mode
e
VTVM
*
AF
oscillator
*
Input
level
controls...MAX
*
ATT
*
Oscilloscope
*
Resistor
(6009)
. Make connections as shown (See fig. 16).
. In the recording pause mode, apply 1kHz (-24dB) to LINE
IN.
.
Adjust
АТТ
so
that
output
level
LNE
OUT
is
0.4V+1dB.
AF
oscilator
АТТ
мелу
Record
mode
УТУМ
—
Oscilloscope
.
At
this
time,
check
that
OdB
indicator
is
lighted
halfway
Fig.
16
(intermediate
brightness
between
full
brightness
and
light-
out:
See
fig.
17).
-:3
Г
ТОРЕК
10
+
$
3
4
(|
*
005
3]
+08
5.
It
the
indicator
is
not
lighted
halfway
as
described
in
step
4,
|
ТІЛЕДІ
£O № +
adjust
VR9
(L-CH),
VR10
(R-CH).
Шш
ШШШ
uibs
gx
6.
Repeat
adjustments
and
checks
at
steps
3,
4
and
5
two
or
three
times.
Fig.
17
ш ш шшшшшшшшшш
Ф
Dolby
NR
circuit
Condition:
Equipment:
*
Record
mode
*
VTVM
*
AF
oscillator
*
Dolby
NR
switch...IN/OUT
*
ATT
*
Oscilloscope
*
Dolby
NR
select
*
Resistor
(6009)
switch...B/C
Balance
control...Center
* input level controls... MAX
Record side
*
Check
of
the
Dolby-B
type
encoder
characteristics
.
Make
connections
as
shown
in
fig.
18.
.
Set
the
unit
to
the
record
mode.
(NR
select
switch
is
OUT.)
.
Apply
a
1kHz
signal
to
LINE
IN.
.
Adjust
the
ATT
so
that
the
output
level
at
TP3
(L-CH)
and
TP4
(R-CH)
is
12.3mV.
.
The
output
level
at
pin
21
should
be
OdB.
.
Set
the
NR
select
switch
to
B,
and
make
sure
that
the
output
signal
level
at
pin
21
of
IC5
(L-CH)
and
IC6
(R-CH)
is
+6dB+2.5dB.
.
Set
the
NR
select
switch
to
OUT,
and
adjust
the
frequency
to5kHz.
The
output
signal
level
at
pin
21
should
be
OdB.
.
Set
the
NR
select
switch
to
B
and
make
sure
that
the
TP3
(L-CH)
output
signal
level
at
pin
21
of
IC5
(L-CH)
and
IC6
(R-CH)
is
ТРА
(R-CH)
+
8dB+2.5dB.
*
Check
of
the
Dolby-C
type
encoder
characteristics
9.
Repeat
steps
1-5
above.
10.
Set
the
NR
select
switch
to
C
and
make
sure
that
the
output
signal
level
at
pin
21
of
IC5
(L-CH)
and
IC6
(R-CH)
is
+
11.5dB«2.5dB.
AF
oscillator
ATT
"me
11.
Set
the
NR
select
switch
to
OUT
and
adjust
the
frequency
16
(R-CH)
VIE.
оваа
to
5kHz.
The
output
signal
at
pin
21
should
be
OdB.
.
12.
Set
the
NR
select
switch
to
C
and
make
sure
that
the
Fig.
18
output
signal
level
at
pin
21
of
IC5
(L-CH)
and
ІС6
(R-CH)
is
T
8.5dB+2.5dB.
со ч ость © ND —

Ш BLOCK DIAGRAM (L-CH ONLY)
[Dolby ON/OFF] [Dolby в CNR |
Line/Mic
Selector
53
59
NR Dolby
52-1 52-3
LINE ІМ off on B с
Q о—
С) Ом
О
Balance
Control
MIC JACK
E
Лс уг)
RECORD/
q
pay
V
C
PX
asa
PLAYBACK
HEAD^-
61-5
$
9
/
—!
м
;
=>
51-2
УЛ
е:
/
VRI
"^
РА
==
ce
his
к
хі
7
gain
adj.
7O
7
Y
/
)
/
/
/
/
E
e
Dolby
B:
CNR
01
QII
CrO2/Metal
ы
реу
Á
(^)
HALF/ ON
4
FF/REW/CUE /REV
To
R-CH
TB
VR8
VR7
Bias
Current
adj.
9135
О
ERASE
HEAD
О
О
x 8
als RECTIFIRE
REGULATOR
0000000000
Fr N

iby ON/OFF] [роњу B-CNR |
53 59
NR
Dolby
ІСЗ
(1/2)
ot dias 5-25 € VR5 REC AMP
Overall gain adj
+B
LINE OUT
т
a]
Q3
P.B/ ON
IC 4 (1/2)
HEADPHONES
J3
HEADPHONES JACK
cit
%,
From R- CH —— —o——^
Tape Selection
ТЖ 55-1
off normal
Q
Erase current
adjustment jumper wire
D5 (REC)
j ж
FL meter аа).
RECTIFIRE
LATOR
оо NOTES:
Сз
ы)
*
(==>)
this
arrow
indicates
the
flow
of
the
playback
signal.
57
М
(=>)
this
arrow
indicates
the
flow
of
the
recording
signal.
Power
ON/OFF
М
(mi,
)
this
arrow
indicates
the
flow
of
the
recording
signal
and
playback signal combination.

Ш SCHEMATIC DIAGRAM
B MAIN CIRCUIT SECTION
A ІСІ
Line m Mic lineum mic
11 DO ©
M5219L 01,2
РВЕ. АМР 25А1115ЕҒ
51-5 51-2 a SWITCHING 51-4
ріау---гес різу---гес +| CrO,/Metal: ОМ play==rec
o Feo O © ©
LINE
IN
a
1
мэ
L ch © ш ANS
o 8
581 28V
we 69V ЧС)
(5)
JI
MIC ©
E
Lco E ©
51-6 51-1
рісу--тес play==rec
LINE IN
SECTION
si-3
plays—rec
—— Playback
R21! IOK
1С5,1С6
ТЕА0665
DOLBY B, C NR
Input level
control
ov
"d.e ©
MIC
Rich mos -7.6У ae
G) ox
ст
о
Bou Ж
R/P HEAD A] o |
R KLÈ es Leg
ob “95
css roe
120P 10 Q18, 19
nu ы. 28C33110
2 5 SWITCHING
30mH 0.001 L
E š 5
454 24 55-2 54-2
9 4%--епогтоі off-—ro2
$
ERASE HEAD 9 !
(зу Ф
amos
KA -
вт;
F Lj
wire
C45 0018
F^ г
| 1 I L
Erase current
adjustment jumper
к
Dolby оз
Sam 51-7
В---< ON |+ Play --rec
Ft ea
R429
22K
8419] В417
вак
22K
ал R
< a
R418
(B)
Til 1 Y 58420 2.2K
V
33K
R408 |R406
ік
013
250592
BIAS OSC
015
25А1115ЕҒ
MUTE DRIVE
25VI0
H3
c50

= +B
а
b b Ч
ls с с
LSLS [4 1 |
жата
5185
ж
ІСЗ +
M5218L
REC AMP
Š
Ni
©
2
8
8
Overall _ 2
gain adj. =
ax 28C3311Q
i. REC. EQ.
$4-1 55-1
off-—cro2 off —— normal
D1 Q3,4
155133 25014508
SWITCHING
Р.В/ОМ
|
e
©
>
=
|
сак сов] 5
Sv
|
Jv OVI
d. Б
es OFF/B,C
>
5
N
Ў
=
0401
ре?
8
5
FS
eve
25С33110
Ea
ET T = к
БТР
Fla E Xx
Ы
ШЕ
|
1, 9% 8 ofw
JBE
|
| | © 1SR35200
016 017
2SC1846R 2SA885R
POWER SUPPLY FILTER
| =
(ard lien i gE RR e Se foo
[o 724
а а
b b co dee do ee cies |
с с 1
m г?з x
8 LE! geg "
юх
1
v
N
і
eR sl 015 8i £e Ў
(pio
SONS BD н en
5.6K
lov
(3)
(3)
C ESCENA
jg Gum e
185133 -p MC921 MA4180L
+-
01742115)
VI
SWITCH
(9)
CIRCUIT
SECTION
-О O
se

10 11 12 13
+B
51-8
ІС4 Ны
М52181. Mraz ren
ra HEADPHONES AMP (D ©
ІСЗ +
М52181.
REC AMP rii
Q) LINE OUT
J3
HEADPHONES
51-9
ріау---гес
25С33110
SWITCHING
HALF/ON
$4-1 55-1
off——cro2 off — normal
ams) LINE OUT
теу ат R48 5.6K
laio ® +B
[il FL meter
CIRCUIT SECTION
vi $8 00033
2 м
"c чуан C201, 202
$$ BA6146
FL METER DRIVE
+B +B
E e анй
012
-B 156133
“жені RL LT е-е фай EES 7 >.
емее ісер» {опер fF lao ST ТРЕНЕР ТЕР ене 7)
+8
RECORDING)
B
17—771
=
за
Swat
Rues
«ајла
t|
моон) [ыж ыл cac hr. а -m |
EISE шаш
C206 470P
©
Т
AC IN I20V endo
(50/60 Hz)
ipi
Y
Bil Ac power
| SUPPLY
SWITCH
CIRCUIT
on
SECTION
LED
CIRCUIT
SECTION
SECTION
(Хм)
1
4

YTES-
17 $1-1$1-9: Record/playback switch (shown in playback position).
2 $2-1~S2-4: Input select switch (shown in line in position).
s3 : Dolby NR switch (shown in OFF position).
54-1,54-2 : CrO, tape select switch (shown in OFF position).
55-1,55-2 : Normal tape select switch (shown in OFF position).
56 : FF/CUE/REW/REV switch (shown іп OFF position).
Ё 57 : Power ON/OFF switch (shown in OFF position).
58 : Dolby В * С NR selector (shown in Dolby B position).
VR1,2 : Playback gain adjustment VR.
VR3 : Balance control.
VR4 : Input level control.
VR5,6 : Overall gain adjustment VR.
VR7,8 : Bias current adjustment VR.
VR9,10 : FL meter adjustment VR.
L1,2 : Bias trap coil.
36. 13,4 : MPX filter.
. L7 : Bias oscillation coil.
Resistance are in ohms (Q), 1/4 watt unless specified otherwise.
1K=1,000(Q), 1M = 1,000k(9).
Capacity are in micro-farads (uF) unless specified otherwise.
All voltage values shown in circuitry are under no signal condition and
playback mode with volume control at minimum position otherwise
specified.
Voltage values at record mode.
.-Voltage values at CrO, tape mode.
..Voltage values at Metal tape mode
.. Voltage values at Stop mode.
For measurement use-VTVM.
+В ) indicates B + (bias).
В ) indicates В- (bias).
) indicates the flow of the playback signal. (NR out).
(ae) indicates the flow of the recording signal. (NR out).
Тһе part No. of transistors, ІС and diodes mentioned in the schematic
diagram stand for production part No. Regarding the part No. with о mark,
the production part No. are different from the replacement part No.
Therefore, when placing an order for replacement part, please use the part
No. in the replacement part list.
QUIVALENT CIRCUIT
201, 202: BA6146
Voltage value at which the noise reduction switch is turned on.
ж Input level control ...MAX
* Balance control...... Center
Overall distortion
* Test tape
..QZZCRA for Normal
...QZZCRX for CrO,
..QZZCRZ for Metal
Overall S/N ratio
ж Test tape... QZZCRA
Less than 3.5%
CrO2, Metal......
Less than 4%
Greater than 43dB
(without NAB filter)
B ELECTRICAL PARTS LIST
NOTES: RESISTORS CAPACI
Carbon
...Metal-oxide
...Metal-oxide
...Metal-film
Metal-film
REPLACEMENT PARTS LIST
Important safety notice
Components identified by A mark have special
characteristics important for safety Fuse type metallic
When replacing any of these components, use mw OOO
only manufacturer's specified parts ERF ы Cement
ee mee CE SC тшш —
RESISTORS ERD25FJ100 C 9, 10 ECQM1H103JZ
À A 87 ERD25FJ562 C 11, 12 ECEA1CU100
В 423, 424 ERD25FJ392 С 407, 408 ECQM1H473JZ
R 67, 68 ERD25FJ102
R 425 ERD25FJ103 С 409, 410 ECQM1H224JZ
А
Te
n
ЕМЕН
В
426
ERD25TJ563
С
411,412
ECEA50ZR68
В 73 ERD25FJ103 R 427 ERD25TJ223 С 413, 414 ECQM1H 103JZ
R74 ERD25F J472 R 428 ERD25FJ103 C 415, 416 ECQM1H472JZ
R75 ERD25TJ104 R 429 ERD25TJ223 C 417, 418 ECEA1CU100
R 76, 77 ERD25FJ103 C 419, 420. ECQM1H473JZ
CAPACITORS С 421, 422 ECQM1H224JZ
5 n 80 Бетіне С 423, 424 ЕСЕА502868
R 81 ERD25FJ150 C12 ECKD1H821KB | С 425, 426, 427, 428
R 82 ERD25FJ392 C 3,4 ECEA1EU4R7 ECEA1CU100
R 83 ERD25FJ150 C5,6 ECEAOJU101 С 429, 430 ECEA1EU4R7
R 84 ERD25FJ1R0 C:7,8 ECCD1H181K | С 431, 432 ECQM1H224JZ
TERMINATIONS
1
ІС1, 3,4
. ^ Cathode
E
Cac—t4¢—
А
Q3~12,
18, 19,
D1,
3,
6,
307,
401
313
Anode
сыпев
е
p.
d
Cathode
Сао----<А
Сао----А
D4 D8~11
Marking
#7;
55
456
ЕСВА
ECG
ECKG
ECCG
ЕСЕП
ЕСОМ
Ref. No
INTEGR
R3,4 ERD25FJ101 R 88 ERD25FJ100 С 13, 14 ECKD1H681KB ІСІ
R5,6 ERD25TJ473 R 89 ERD25FJ471 C 31, 32 ECEA1HU010 163,4
R7,8 ERD25FJ820 R 90 ERD25FJ271 C 37,38 ECQMIHEBZ |1656
R 9, 10 ERD25TJ334 R91 ERD25FJ390 C39,40 ECQMIH332/Z |16242
R11,12 ERD25FJ682 R92 ERD25FJ562 C41,42 ECEA1HU010 :
R 13, 14 ERD25FJ562 R 93 ERD25TJ333 C 43, 44 ECEA1AU471 TRANSI
В 15,16 ERD25TJ104 R 94,95 A ERD25FJ102 C 45 ECQP1183JZ
R 17, 18 ERD25FJ222 R 96 À ERD2FCJ4R7 C 46 ECEA1CU101 a 1,2
R19.20 ERD25TJ223 R 97 ERD25FJ820 |C47 ECFDD153KXY | 34
R21 ERD25FJ103 R 100 ERD25FJ182 C 48 ECFDD822KVY Q 5 6.7
R 101, 102 C 50 ECEA1CU100 '
R22 ERD25FJ102 À ERDS1FJ100 С 51,52 А ECEA1AU221 Q 13
R 25, 26 ERD25F J102 R 203, 204, 205, 206 C 53, 54 A ECEA1CU222 Q 15
R 43, 44, 45, 46 ERD25FJ103 |С 56,58 — ECKDIH2237F | Q16
к ERD25FJ222 R 209 ERD25FJ102 017
R 47, 48 ERD25FJ682 В 401, 402 ERD25FJ242 C 57, 58 ECKD2H121KB Q 18, 19
R 49, 50 ERD25FJ272 R 403, 404 ERD25FJ562 С 59, 60 ECQM1H102JZ Q 401
R 51, 52 ERD25FJ560 В 405, 406 ERD25FJ332 С 63, 64 А ECKD1H223ZF
В 53, 54 ERD25FJ181 R 407, 408 ERD25FJ102 С 201, 202 ECFDD563KXY DIODES
R 55, 56 ERD25TJ223 R 409, 410 ERD25TJ333 С 203, 204 ECEA1CU100
В 57,58 ERD25FJ822 R 411,412 ERD25TJ823 C 205, 206 ECKD1H471KB D 1
R 59, 60 ERD25F J8R2 R 413, 414 ERD25FJ821 C 301 ECEA1CU101 D2
4 R 415, 416 ERD25FJ512 C 302 ECKD1H103ZF D3
R 417, 418 ERD25TJ683 C 401, 402 ECCD1H820K
d 2) = en ee R 419, 420 ERD25FJ222 |С 403, 404 ECQM1H472UZ В :
ERD25FJ472 В 421,422 ERD25TJ823 С 405, 406 ЕСЕА1С1/100 D 8, 9, 10
VR 9, 10.

carbon
Metal-oxide
Metal-oxide
Metal-film
Wetal-film
"use type metallic
Solid
ECOM1H103JZ
CAPACITORS
Ceramic
-Ceramic
Ceramic
... Ceramic
Ceramic
ECQM ......Polyester film
INTEGRATED CIRCUITS
Polyester film
..Polypropylene
..Electrolytic
..Non polar electrolytic
Polystyrene
EGCSDU ..... Tantalum
QGS. ..... Tantalum
ECEA1CU:00
tie ІСІ М52191. L1,2 QLQX0343KWA Bias Trap Coil
ecomiveszjz
|103,4
M5218L
13,4
QLMSZIOK
MPX
Filter
EE [656 ТЕА0665 L5,6 ELM7Q306A Skewing Network
ECEA1HUO10
IC
201,
202
ВА6146
L7
QLBO198KA
Bias
Oscillation
Coil
E TRANSISTORS
ECEA1CU101 a 1,2 2SA1115EF COMBINATION PARTS
Mp Q3,4 25014508
го күү [45 6, 7, 8,9 10, 11, 12 21,2 EXRP220K124
E 25033110
ee, 2 Q 13 250592
Es. |915 2SA1115EF TRANSFORMER
Q 16 2SC1846R
4 017 2SA885R T A QLPP65EKC АС Power Transformer
EP Q 18,19 25С33110
E +5 Q 401 25С33110
ECEDDSESKXY | DIODES & RECTIFIERS SWITCHES
ECKD1H471KB D 156133 51 QSSA209AT Slide Switch (Record/
ECEA1CU101 D MC921 Playback Selector)
Ескрін1032Ғ | 5 А 52,3, 4,5 |
ECCDIHEOK |p AMAA 180. QSWX604T Push Switch
ECOM1H472JZ D LN216RP 56 05В025110 Leaf Switch
ECEA1CU100 Pen. (FFICUE/REW/REV)
ECQM1H473JZ Als S7 AOQSW4217T Push Switch
ЕСОМ1Н224/2 |j тсз (Power ON/OFF)
ECEASOZRS8 р es 58 QSWx604T © Push Switch
ECQM1H 103JZ
ECOM1H472JZ
=cEAicu-90. | VARIABLE RESISTORS JACKS
ES В м NE VR1,2 - EVNM4AAO0B24 | | 31,2 Quao4asac Microphone Jack
ЕСЕА507858 VR3 EWANG5X05G15 уЗ QJA0455C Headphones Jack
27 428 VR4 EWAPB1X05A54
ECEA:CU:00 |VR5,6 ЕУММААА00854
ECEA1EU487 VR 7,8 EVNM4AA00B15 CONNECTORS
=COMiH204Jz | VR9,10 — EVNM4AAQ0B54
CN 1 QJT1090 Check Pin
CN2 QJS1921TN ЗРіп Socket
CN 3 QJS1961S Jumper Socket (5 Pin)
CN4 QJS1922TN 6 Pin Socket
CN 5 QJS1993S Jumper Socket (6 Pin)
CN6 QJP1921TN 3 Pin Plug
CN? QJP1922TN 6Ріп Plug
CN8 QJT1054 Contact
CONNECTORS
„7“ Cathode
Са>-М--А
D1, 3, 6, 307,
313
Marking
СА
456
L7
Removing contacts
Push the paw! of a contact in
each hole in the housing with a
flat bladed screwdriver and pull
its lead wire to remove the
contact
11
10
B CIRCUIT BOARDS AND WIRING CONN!
m VOLUME CIRCUIT BOARD
ПЕ ч
ж
a
Ex
NI
|
|
аа
SCPWSI-E Es SS
CA La an"
L
оз
‘wh //

9 8 7 6 5
NG CONNECTION DIAGRAM
AC POWER SUPPLY CIRCUIT BOARD
T1: AC POWER
TRANSFORMER
”
о”
І
IRCUIT BOARD Nu.
|
I" d
ucl D ы
n
'
T
1
—
i
di
kde
29
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PRIS
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at
jt
і
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n
{
|
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i
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ж
ee
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б
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53
054
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011
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er.
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zan
eS
-
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$
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PANN
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1
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AC
POWER
CORD
«ЖШ!
ele
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52
rm
|
i
272) D 4 GI 8
e cw =
tl
Шы.
015
=
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0426 = “ DIK ERLE A
sees
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ow.
tin
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-
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LUG
TERMINAL
RUM,
а
y
k^
am
numer
ee.
4
t
(To
mechanism
unit)
ERASE
HEA
S
4
f^
+
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©
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ws
ООВ
56:
FF/REW
ae
IE
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SWITCH
-
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сч
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EX wo» 15 4 І
== S| Әр owt NL D ы
de ИР & | "up "ut e
122} b'aN Se а (10% 2 аб
Is 2 25 оа рогу ETES 1
\ Aud que a = Е. 2
SEC di L—
~ j ES MEE Sn — i
| 4 | mar = i OO E, Быны ыр се)
gH 3 ; pm зә eS. Erase current adjustment
— z 3 jumper wire.

WER SUPPLY CIRCUIT BOARD
I
p d
ШІ swircH сінсит |
BOARD ;
57: POWER B
ЖЕР"
ns т [Ад Т 1 | |,Me—-——--- Ae |
LS || | ee EA -., J 1
РМ И ИСЕ -—— au VL SV mms a NE zi
'
C
AC POWER CORD
D
|
BOARD
ER — - ------ CONNECTION OF А FLAT CABLE |E
LUG TERMINAL
: ] Connect the flat cable to the jumper
|
mba
иу
a
MOTOR
Р
socket
so
that
the
white
line
оп
the
flat
X "per ORG... Orange cable corresponds to the band mark side
BLU.........Blue
PNK........Pink
of
the
connection
symbol
(yellow
or
white
BRN ........Brown RED Red symbol on the PC board) for the jumper
GRY........Gray
SLD
geo.
Wire
|
socket.
(This
connection
may
differ
from
1 А
ЖТ eA е CA those for conventional models.)
NIL No Color Mark YEL Yellow Flat Cable White Cine
Saai
ІШІ F
7 Jumper
NOTES: i amar SON
* The circuit shown їп оп the conductor side |
indicates printed circuit on the back side of the
printed circuit board. 1 Connection
Symbol
* This circuit board diagram may be с 2558
modified at any time with the
development of new technology. Band Marking
Ма A

| APPLY MOLYCOAT
EM-20L
Ш MECHANICAL PARTS LOCATION
(Front View)
NOTE:
When changing mechanism parts. apply the
specified grease and oil to the area marked
“хх” shown in the drawing "Mechanical
Parts Location”.
* Molycoat:
Lubricating oil
* Rocol paste: Lubricating oll
* AK-152:
Lubricating oil
REPLACEMENT PARTS LIST
Part No.
Part Name & Description
Erase Safety Lever
Fast Forward Rod
Eject Rod
Record Rod
Auto-Stop Rod
Main Control Lever
Sub Lever
Sub Control Lever
Pause Lock Lever
Main Gear
Sub Gear
Pressure Plate
Sub Lever Spring
Record/Playback Arm
Spring
MECHANICAL PARTS
101 QML4156
102 QMR2144
103 QMR2145
104 QMR2146
105 QMR2149
106 QML4093
107 QML4094
108 QML4095
109 QML4096
110 QDG1330
111 0061331
112 QMF2333
113 QBN2035
114 QBN2036
116
117
118
119
122
123
124
125
126
127
128
129
130
131
132
MOLYCOAT
EM-20L
SPECIFICATIONS
Pressure of pressure roller | 350+50g |
Takeup tension 15
ж Use cassette torque 5 t 109CM
meter...... QZZSRKCT
Wow and flutter; (JIS) Less than
* Use test tape
| ғ QZZCWAT
0.07% (WRMS)
Part Name & Description
QBT1868D Obstruction Rod Spring
QBN2039 Auto-Stop Rod Spring
QBN2044 Auto-Stop Lever Spring
QBC1483 Pause Pin Spring
QBS1143 Half Retain Spring
QBS1128 Lock Pin
QBN2031 Main Lever Spring
QBN2032 Pause Return Spring
QBN2034 Main Control Lever Spring
QDB0360 Capstan Belt
QDB0359 Fast Forward Belt
QTD1181 Wire Clamper
QXL1689 Main Lever Assembly
QML4097 Takeup Lever
QDG1333 Takeup Intermediate Gear
QMB1434 Cap
QML4098 Fast Forward Lever
QDG1335 Fast Forward Gear
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
Part No.
QML4099
0061336
QXD0158
QXG1082
QXK2902
QMS2634
QDG1339
QDP1989
QML4101
QML4102
QML4103
QML4108
QBN2040
QBN2046
QBC1484
QDR1179
QMK2108
APPLY АК-152
E
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*
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Part Name & Descriptid|
Rewind Lever
Rewind Gear
Takeup Ree! Table
Assembly
Takeup Gear Assembly
Sub Chassis Assembly
Takeup Axis
Auto-Stop Cam Gear
Intermediation Pulley
“е с-ту////1->
Auto-Stop Detection Lev
Auto-Stop Driving Lever
Auto-Stop Change Lever
Brake Lever
Auto-Stop Release Sprin
Brake Spring
Auto-Stop Pressure Spri
Supply Reel Table
Head Base Plate

RS-B14
Par: Name & Description
Rewind Lever
Rewind Gear
Takeup Reel Table
Assembly
Takeup Gear Assembly
Sub Chassis Assembly
Takeup Axis
Auto-Stop Cam Gear
intermediation Pultey
Auto-Stop Detection Lever
Aito-Stop Driving Lever
Auto-Stop Change Lever
Brake Lever
Auto-Stop Release Spring
Brake Spring
Auto-Stop Pressure Spring
Suppty Reel Table
Head Base Plate
RS-B14
APPLY æ N63)
MOLYCOAT F psi
= EM-20L T = 19
%
~APPLY
À ROCOL PASTE
D
|
GREASE MOLYCOAT
APPLY MOLYCOAT
To tape
countor|
APPLY
MOLYCOAT
EM-20L
f/
СУ
R
APPLY.
MOLYCOAT
EM-20L
MOLYCOAT
EM-20L CER
Part No.
Part No. Part Name & Description Ref. No. | Part Мо.
Part Мате & Description Part Name & Description
150 QMF2334 Head Adjustment Plate 167 QMA4766 Mechanism Angle-L 186 QJT0015 Lug Terminal
151
QMZ1314
Head
Spacer
|
187
QBC1372
Supply
Reel
Table
Spring
152 QWY4165G Record/Playback Head 168 QMA4767 Mechanism Angle-R
153 QWY2138G Erase Head 169 QDB0169 Counter Belt . 188 QMB1336 Supply Drive Claw
154
QBC1278
Head
Spring
170
QBC1500
Lock
Rod
Spring
155
QBN2033
Head
Pressure
Spring
171
ан.
Ввоз
АШЫ
краны
ің
156 ОВТ2018 Head Return Spring 172 1 ecord Button Assembly | SCREWS, NUTS AND WASHERS
157
QXF0237
Flywheel
Assembly
173
QXL1699
ee
Button
:
1571 QBW2049 Poly Washer Se N51 XTV3+6B Tapping Screw Ф3х6
1572 QBW2026 Washer 174 QXL1700 Stop Button Assembly NÉ INDIOS Tapping Kinase 6
158 QML4100 Change Lever 175 QXL1701 Rewind Button Assembly N 53 XTN26 + 6B Tapping Screw @2.6x6
| 176 QXL1702 E S Button N 54 XTV3--10BFN Tapping Screw @3x 10
159 QBN2038 Change Lever Spring ssembly N 55 XTV3+20BFN Tapping Screw @3x 20
160 QXL1694 Pinch Roller Arm 177 QXL1703 Pause Button Assembly N 56 XTV3 + 37B Tapping Screw 3x 37
Assembly
160-1 QBN2047 Pinch Roller Arm Spring QMA4753 Operation Button Angle М р Ne a Жән жі
161 ОВР2045 Return Spring 179 QMR2148 Obstruction Rod N 59 XSN24.3 Screw 2x3
162 QXU0355 Motor Assembly 180 QMR2147 Lock Rod N 60 QBW2046 Poly Washer
163 QMF2335 Flywheel Holding Plate 181 QMN2869 Operation Lever Shaft
164 0М21313 Thrust Retainer 182 QBP2018 Operation Lever Spring
165 QXL1695 Record/Playback Arm 183 QBS1145 Head Pressure Wire + 5 pus a rose
Assembly 184 QMN2883 Intermediate Gear Axis N 63 XTN3 + 10B Tapping Screw @3x 10
166 QBN2045 Record/Playback Spring 185 QBC1502 Erase Head Spring N 64 XWG3 Washer 36