Akai 4000DS Mk-II User manual

AKATI
SERvICE
MANUAL
STEREO
TAPE
DECK
4000DS

SECTION |!
SECTION 2
SECTION 3
STEREO
TAPE DECK
MODEL
4000DS
SERVICE
MANUAL
PARTS
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SCHEMATIC
DIAGRAM
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VIL.
SECTION 1
SERVICE
MANUAL
TABLE
OF
CONTENTS
SPECIFICATIONS
...
se
Tasahd
cat
tases
cols
gst
aeeieasioages
MEASURING
METHOD
.....
"
DISMANTLING
OF
TAPE
TRANSPORT
UNIT
&
AMPLIFIERS
.....--
MECHANISM
ADJUSTMENTS
HEAD
ADJUSTMENTS
....
AMPLIFIER
ADJUSTMENTS
....-
COMPOSITE
VIEWS
OF
COMPO

il.
SPECIFICATIONS
An asterisk next to a figure indicates the minimum guaranteed performance.
TRACK SYSTEM
REE L CAPAC ITY
‘TAPE SPEED
WOW AND FLUTTER
FREQUENCY RESPONSE
AKAI SRT tape
Regular tape
SIGNAL TO NOISE RATIO
‘DISTORTION
CROSS TALK
ERASERATIO.
INPUTS
Line input
Din input
OUTPUTS Line output
Din output
BIAS FREQUENCY ey
BIASLEAK
HIGH FREQUENCY DEVIATION
RECORDING CAPACITY
FAST FORWARD AND REWIND ‘HIME.
MOTOR
HEADS
Playback Head
frase Head
TRANSISTORS
IC
DIODES
POWER SUPPLY
POWER CONSUMPTION
INSULATION RESISTANCE
INSULATION DURABILITY
DIMENSIONS
WEIGHT
NOTE:
_ Less than 9. 20% (0.30%) RMS at 3-3/4 ips
Mic input
0.4V
| Within 2 dB using an 8,000 Hz 3
Revolutions: |,800/1 500 rpin.
Reeording Head
Impedance:
_4-track 2-channe! stereo/monaural system
_ Up! to reel
_7-1/2 and 3- 3/4 i ips + 2% (43%) | ae
Less than 0.15% (*0.22%} RMS at 7- 1/2 ig ips
30 to 23,000 Hz (*40 to 22,000 Hz) + 3 dB at 7-1/2 ips
30 to 16,000 fiz (440 to 14,000 Hz) £3 dB at 3-3/4 ips
30 to 20,000 Hz (440 to 20,000 Hz) t 3 dB at 7-1/2 ips
30. to t4 000 He (*40 to 14 000 Maz) 3 = 3 dB at 3- “3/4 ips:
Better than 50 dB at 7-1/2 ips
Better than 48 dB at 3- ‘3/4 ps
“Less ‘than 1. 5% (#2. 0%) at 7- 1/2 ips”
Less than 2.5% at 3- 3/4 ips
Better than 70 dB (*60 dB} moda
_ Better than 50 dB (*45 dB) stereo
_ Better than 70 dB
0.8 mv Impedance 5 ka
70 mV Impedance 150 ks
7TmvV
t.228V (4 £1 dB) using a 250 Hz “0 VU recorded tape
10S kliz 45%
Less than 30, vu
60 min, stereo recording using a “4,200 ft. tape at 7-1/2 3 ips boast
152/190 sec, using a FE, 200 ft. tape at 60/50 Hz
4-pole induction |-speed motor
Type: SSM-1
at 60/50 Hz
In-line 4-track 2-channel recording head
Lype: P4-154
Gup: } micron
linpedunce: 9592 + 15% at 1,00 Ete
Indine 4-track 2-chaunnel playback head
Type: P4-150
Gap: Lamicron
Impedance: 1.2509 * 15% wt b.000 He
In-line 4-track 2-channel erase head
Type: 14-200
Gap: 0.6 mm
20082 25% at LOO KHz
More than 5 M&d
1GO00V AC. for more than fan. duration
406 (W)X 314) xX 194 (Dyan (15.9 X 12.4 X 7.67)
EL.4 ke (25 Ibs} . .
Specifications subject to change without notice.
3/4 ips recorded tape at ue 4/2) ips na
2SC971 (2) 3) (red)
Ob45524 28C458 LG (C) (D) Dis dint Bo.
BD” aca atlge tae esCa7i yh) Pol... 28C1098 ¢t.) &M)
4 0.... LDA
2....., IN34A
ree 1OPC.1
ts vicki S339
100 to 240V AC, S0/60 Hz
120V AC. 60 Hz for CSA/UL Models
220V A £. SSO te for Chk model
35W

ll.
MEASURING
METHOD
1.
TAPE
SPEED
DEVIATION
3.
FREQUENCY
RESPONSE
i
ena
4000DS
—_]
counter
|
Line
output
input
Audio
|
Line
4000DS
|
Frequenc,
or
AQT.
i
Gesu
pe
ca
input
sae
|
output
Fig. 1
‘As
shown
in
Figure
1,
connect
a
Frequency
Counter
to
the
Line
Output
of
Model
4000DS,
Take
a
frequency
counter
reading
at
the
beginning,
middie,
and
end
of
tape
winding
during
playback
The
maximum
value
of
these
respective
readings
will
represent
tape
speed
deviation.
2.
WOW
AND
FLUTTER
[
4000DS
|
=
|
Wow
and
aren
[
Line
output
i
ae
oa
(ee
input
A
Fig. 2
Method A
‘As
shown
in
Fig.
2,
connect
the
Line
Output
of
Model
4000DS
to
the
Input
of
a
Wow
and
Flutter
Meter,
Use
a
3,000
Hz
pre-recorded
test
tape
and
take
a
wow
and
flutter
meter
reading
at
the
beginning,
middle,
and end
of
tape
winding.
The
maximum
value
of
these
respective
readings
will
represent
the
wow
and
flutter.
Method B
Supply
a
3,000
Hz
sine
wave
signal
from
an
Audio
Frequency
Oscillator
and
make
a
recording
on
4
blank
tape
at
the
beginning,
middle,
and
end
of
tape
winding.
Rewind
and
playback
tape.
Measure
wow
and
flutter
with
a
Wow
and
Flutter
Meter.
(The
wow
and
flutter
value
of
Method
B
will
be
close
to
twice
that
of
Method
A.)
|"
Sensitivity
VI-VM.
oa
Fig. 3
For
measuring
frequency
response,
connect
instru-
ments
as
shown
in
Fig.
3 and
proceed
as
follows:
1)
Supply
a
1,000
Hz
sine
wave
to
the
Line
Input
of
Model
4000DS
from
an
Audio
Frequency
Oscil-
lator
through
an
Attenuator.
Set
recorder
to
re-
cording
mode
and
turn
recording
level
volume
control
to
maximum.
Adjust
Attenuator
to
obtain
a+4
dB
V.T.VM.
reading.
2)
Under
conditions
described
in
1)
above,
re-adjust
‘Attenuator
so
that
the
Line
Output
Is
-16
dB,
and
record
40
to
20,000
Hz
spot
frequencies.
3)
Rewind
tape
and
playback
from
the
beginning.
Take
V.T.V.M.
spot
frequency
readings
and
plot
values
on
a
graph
NOTE:
When
measuring
frequency
response,
new
tape
should
be
used.
4.
SIGNAL
TO
NOISE
RATIO
4000DS
Line output
High
Sensitivity
VTVM.
Fig. 4
‘As
shown
in
Fig.4,
connect
a
High
Sensitivity
V.T.VM.
to
the
Line
output
of
Model
4000DS.
Playback
a
250
Hz
“Q”
VU
pre-recorded
test
tape
and
measure
the
output.
Then
remove
the
tape
and
measure
the
noise
level
under
the
same
condition.
Convert
each
of
the
measured
values
into
decibels.

i
5.
TOTAL
HARMONIC
DISTORTION
7.
ERASE
RATIO
FACTOR
As
shown
in
Fig.
4,
connect
a
High
Sensitivity
V.T.V.M.
to
the
Line
Output
of
Mode!
4000DS.
So
a
]
.
Playback
a
virgin
tape
and
take
a
V-T.V.M.
reading
of
|
Audio
i
ee
ane
4000DS
the
output
level.
Next,
record
a
1,000
Hz
sine
wave
|
eee
py
ATT.
4
input
Line
signal
at
+3
dB,
then
playback
this
recorded
signal
pe
es
ot
output
|
and
tape
a
V.T.V.M.
reading
of
the
output
level.
|
|
Next,
using
this
pre-recorded
tape,
record
under
a
|
aaa
]
non-input
condition
and
take
a
reading
of
the
noise
re
ae
level
output
of
the
erased
signal
and
obtain
a
ratio
between
the
two
from
the
following
for
mula:
Meter
Seer
beesGiiasictl
Ot
Fig.
5
Er
=
20
log
ee
{dB)
Where,
Er
-
Desired
erase
ratio
(dB)
Connect
the
measuring
instruments
as
shown
in
Fig,
5
Eg-
1,000
Hz
signal
output
level
and
record
a
},000
Hz
sine
wave
signal
at
“O”
VU.
Ez
-
Non-input
signal
recorded
level
Playback
the
resultant
signal
and
measure
the
overall
FE,
-
Virgiti
tape
noise
output
level
distortion
factor.
Measure
the
noise
level
of
the
tape
recorder
without
the
tape.
Connect
the
Audio
Fre-
quency
Oscillator
directly
to
the
distortion
meter
tor
measurement
of
the
distortion
factor
of
the
oscilla-
tor,
The
required
distortion
factor
can
be
obtained
from
the
results
of
the
above
measurement
by
the
following
formula:
dg
=d-
d,
—d2
where,
dg
—
Required
distortion
factor
d
—
Overall
distortion
factor
dy
--
Noise
level
dy
—
Distortion
factor
of
the
oscillator
NOTE:
When
measuring
the
distortion
factor,
new
tape
should
be
used.
6.
CROSS
TALK
(Cross
talk
between
the
tracks)
(TAPE)
—_~—
mime
TAPE
DIRECTION
Fig. 6
As
shown
in
Fig.
6,
first
record
a
|
000
Hz
sine
wave
signal
on
Track
No.
3
at
+3
VU
Jevel.
Next,
record
under
a
non-input
condition.
Then,
playback
the
tape
on
Tracks
No.3
and
4
through
the
B.P.F.
(band
pass
filter
sensitivity
...
1:1)
and
obtain
a
ratio
between
the
two
from
the
following
formula:
a
Ep
where,
C
-
Desired
cross
talk
ratio
(dB)
Eg
-
1,000
Hz
signal
output
level
ees
Ex
—
1,000
Hz
cross
talk
level
LLB
Ey
-
Non-input
signal
recorded
level
#RRRRy
A
RR

DISMANTLING OF
TAPE TRANSPORT UNIT & AMPLIFIERS
In
case
of
trouble,
etc.
necessitating
disassembly,
please
disassemble
in
the
order
shown
in
photographs.
Re-
assemble
in
reverse
order.
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——
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PINCH WHEEL CAPI
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gate tees

Iv.
MECHANISM
ADJUSTMENTS

1.
PINCH WHEEL ADJUSTMENT
It is important that the pinch wheel shaft be kept in
perfect alignment with the capstan shaft. Proper
pinch
wheel
pressure
is
between
1,000
and
1,150
grams
when
the
unit
is
operated
at
the
tape
speed
of
7% ips. Any deviation from this specification will
result in wow and flutter. Check pinch wheel pressure
with a spring scale, and if necessary, adjust the pinch
wheel load spring.
Fig.
8
Fig.
9
2. SUPPLY REEL SHAFT ASSEMBLY
ADJUSTMENT (See Fig. 7 at left)
Felt clutch material (2) is used between the lower
side of the ree! table base plate (1) and the rewind
pulley (3) to protect recording tape from excessive
tension during rewind operation. To check the
amount of friction of this part, install a 5-inch reel
with a 60 mm diameter tape, and gently pull the end
of the tape upward with a spring scale. Adjust the
conical spring (4) so that the amount of tension is
kept between 400 and S00 grams. Other felt clutch
material (5) is attached to the supply roller (6) to
provide proper slippage during FWD and REC oper-
ation. The procedure for checking friction of this part
is the same as the foregoing, and between 80 and 100
grams of tension gives best result. Adjust the spring
(7) just under the supply roller (6). When the unit is
set to fast forward operation, the amount of friction
will decrease to from tS to 20 grams. Check to see
whether this is satisfactory. If not, adjust the spring
plate (8) and the pressure of the pulley. (9).
4)

3.
TAKE-UP
REEL
SHAFT
ASSEMBLY
ADJUSTMENT
(See
Fig.
7
at
right)
Felt
clutch
material
(2)
is
attached
to
the
bottom
side
of
the
reel
table
base
plate
(1)
so
that
the
recording
tape
will
not
stretch
during
fast
forward
operation
due
to
excessive
tension.
To
check
the
amount
of
friction
of
this
part,
install
a
5-inch
reel
with
a
60
mm
diameter
tape,
and
gently
pull
the
end
of
tape
upward
with
a
spring
scale.
Adjust
the
conical
spring
(4)
so
that
the
amount
of
tension
at
this
part
is
kept
between
400
and
500
grams
Other
felt
clutch
material
(10)
is
attached
to
the
take-up
roller
(1).
This
is
to
provide
proper
slippage
during
EWD
or
REC
operation.
The
procedure
for
checking
friction
of
this
part
is
the
same
as
the
foregoing,
and
between
150
and
180
grams
of
friction
provides
the
best
results,
Adjust
the
spring
plate
(7)
just
under
the
take-up
roller
(11)
When
the
unit
is
set
to
rewind
operation,
the
amount
of
friction
of
this
part
will
decrease
to
from
15
to
20
grams.
Check
to
see
whether
this
is
satisfactory
If
not,
adjust
the
spring
(12)
and
the
pressure
of
the
set
sleeve
(13).
4.
RECORDING/PLAYBACK
CHANGING
MECHANISM
(Sce
Figs.
8,
9)
Turning
The
FWD/REC
knob
(N)
to
recording
posi-
tion
causes
Lever
(a)
to
pull.
Recording
Lever
(b)
(as
illustrated
by
dotted
line),
and
the
FWD/REC
chang
ing
Switch
(SW-9)
is
turned
to
recording
position.
If
Lever
(a)
does
not
pull
Lever
(b)
properly,
Changing
Switch
SW-9
will
not
operate
properly.
This
may
cause
abnormal
oscillation
and
inability
to
record.
In
this
case,
loosen
Screw
(c)
and
adjust
lever
10

Since
adjustment
of
the
Heads
critically
affects
(ape
recorder
performance,
it
Is
essential
that
Heads
be
carefully
adjusted
with
precision
measuring
equip-
ment
and
suitable
recorded
tape.
HEAD
HEIGHT
ADJUSTMENTS
(See
Figs.
10,
11)
1) Erase Head
Adjust
height
control
screws
(a),
(b)
by
left
and
right
so
that
the
upper
edge
of
the
tape
is
0.15
mm
lower
than
the
upper
edge
of
the
erase
head core.
2)
Recording
Head
Adjust
the
screws
(c),
(d)
by
turning
to
left
and
right
until
the
width
between
the
upper
edge
of
channel
1
head
core
and
upper
edge
of
the
tape
is
equal
3)
Playback
Head
Adjust
the
screws
(f),
(g)
by
turning
to
left
and
right
until
the
width
channel
|
head
core
and
equal
turning to
between
the
upper
edge
of
upper
edge
of
the
tape
is
RECORDING
HEAD
PLAYBACK
HEAD
Fig.
11
2.
HEAD
SLANT
ADJUSTMENT
35
4
(See
Figs.
10,
11)
Adjust
the
screws
(Head
Height
control
screw)
by
turning
to
left
and
right
so
that
each
head
(Erase,
Recording
and
Playback
Head)
contacts
the
tape
surface
at
a
right
angle.
HEAD
AZIMUTH
ALIGNMENT
ADJUSTMENTS
(See
Figs.
10,
11)
1)
Playback
Head
Playback
an
Ampex
Alignment
test
tape
(8,000
Hz
34
ips.)
at
7%
ips.
Adjust
screw
(h)
by
turning
to
left
and
right
until
the
various
Jine
outputs
are
maximum
2)
Recording
Head
At
recording
mode,
supply
a
15,000
Hz
sine
wave
at
a
-16
dB
recording
level
an
Audio
Frequency
Oscillator
to
the
line
input
of
the
4000DS,
and
set
the
monitor
switch
to
“TAPE”
position.
Then
adjust
screw
(e)
by
turning
to
left
and
right
until
the
various
line
outputs
are
maximum,
Repeat
adjustments
outlined
in
Items
1-2)
to
3,
above
2
or
3
times
to
obtain
optimum
adjusted
condition.

vi.
AMPLIFIER
ADJUSTMENTS
4000Ds |
Line
Line
a
ee
input
output
High-Sensitivity
|
VITLVM.
Output
|
ATT.
Audio
=
Oscillator
2
:
Fig.
12
LEFT
MIC.
VR.
RIGHT
MIC.
VR.
EQUALIZER
SW.
vR-I
vR-2
sw2
LEFT
LINE
VR.
RIGHT
LINE
VR.
vR-!
VR-2
MONITOR
SW.
TAPE
SELECTOR
SW.
sw4
sw3
Fig.
14
1.
PLAYBACK
LEVEL
ADJUSTMENT
(See
Figs.
12,
13,
and
14)
|
smacmoares
24
|
1)
Set the
monitor
switch
to
“TAPE”
position
and
a
Equalizer
switch
to
7%
ips.
vert
pp
LeveL
2)
Connect
a
High
Sensitivity
V.T.V.M.
to
the
line
jy
vR-2@R
=
output.
vr- 1S
bie of 20
4
Fig. 13
3)
Playback
a
250
Hz
pre-recorded
test
tape
at
7%
ips.,
and
adjust
semi-fixed
resistor
VR-2
and
VR-
2b
(20
kB)
to
obtain
a
4
dBP.B.
level.
(VU
meter
indicates
“O”
VU)
Recording
Amplifier
Adjustment
should
be
made
only
after
Head
Adjustments
and
Playback
Ampli-
fier
Adjustments
have
been
made.
2.
RECORDING
LEVEL
ADJUSTMENT
(See
Figs.
12,
13,
and
14)
1)
Set
the
monitor
switch
to
“TAPE”
position
and
Equalizer
switch
to
7%
ips.
2)
Connect
an
Audio
Frequency
Oscillator
to
the
line
input
and
High
Sensitivity
V.T.VM.
to
the
line
output.
3)
Load
a
Scotch-111
blank
tape
and
set
recorder
to
“REC”
mode.
4)
Supply
a
1,000
Hz
sine
wave
from
an
Audio
Frequency
Oscillator
and
adjust
the
line
recording
level
contro!
volumes
(VR-I
and
VR-2
50
kB)
until
the
line
output
level
reaches
4
dB.
(VU
meter
indicates
‘“O”
VU)
5)
Set
the
monitor
switch
to
“SOURCE”
position.
6)
Adjust
semi-fixed
resistor
VR-1
and
VR-Ib
(2
kB)
to
obtain
4
dB
recording
level.
(VU.
meter
in-
dicates
“O”
VU)
7)
Repeat
2
times
in
the
same
way
as
indicated
in
Items
4)
to
6)
above.

(a)
(8)
FREQUENCY
COUNTER
GROUND
Fig. 16
3.
RECORDING
BIAS
FREQUENCY
ADJUSTMENT
(See
Fig.
16)
1) Set the recorder to recording mode.
2)
Connect
a
Frequency
counter
to
points
(A)
and
(C)
in
Fig.
16
of
the
oscillator
P.C.
Board
(LE-5021)
and
read
the
frequency
indication.
3)
If
the
bias
frequency
is
105
kHz
+5%,
the
bias
frequency
is
correct.
4) If the bias frequency is incorrect, it can be adjust-
ed by changing the value of condenser C8 (5600
PF) of the oscillator P.C. Board (LE-5021)
4.
RECORDING
BIAS
VOLTAGE
ADJUST-
MENT
(FREQUENCY
RESPONSE
ADJUSTMENT)
(See
Figs.
15,
16)
1) Set the monitor switch to “TAPE” position and
equalizer switch to 7% ips.
2) Connect an Audio Frequency Oscillator to the line
input through an Attenuator and a High Sensiti-
vity V.T.V.M. to the line output.
3) Load a blank test tape “AKAI 100L” (Fuji S-100)
and set the recorder to “REC” mode.
4) Turn recording level control volume VR-1 and
VR-2
(50k
A)
to
obtain
4
dB
V.T.V.M.
reading.
5) Under conditions described in Item 4) above,
readjust attenuator so that the line output level is
—16 dB.
6)
Record
from
40
to
20,000
Hz
spot
frequencies.
7) Adjust Bias Adjustment semi-fixed condenser C6
(70 PF max.) so that the output of 1,000 Hz and
15,000 Hz frequencies are equal.
8) The bias voltage at this time is around 11V A.C.
5. ERASE VOLTAGE
1) Set the recorder to “REC” mode.
2) Connect a V.T.V.M. to points (B) and (C) in Fig.
16 of the oscillator P.C. Board (LE-S021) and read
the V.T.V.M. indication.
3) The Erase Voltage is around 52V A.C.

VI.
COMPOSITE
VIEWS
OF
COMPONENTS
PRE-AMP.
P.C.
BOARD
(LE-5022)
ax
TO CHASSIS.
FROM J6
FROM MONITOR SW (SW4)
TO STEREO HEAD
PHONE
To LEFT Lit
‘OUTPUT v8
To LEFTech WU METER —————
yw
yy
Mt.
a
FROM J6 ~~
TO MONITOR SW (SW4)—
wr
TO EQ SW (sw2)
ax
FROM MONITOR SW (SW4) [out
TO STEREO HEAL ae
BONE v9 =)
TO RIGHT LINE
TPUT JO ~a
TO RIGHT ch VU METER
TO TAPE Bw
‘SELECTOR SW (SW3)———
wmmesenctiate
AH
ees
gg
FROM
Eee
SEA,
—
{
Bay
ce
en,
f
ta
aa
ar
Ree
E
Be
WE
Halkps
ye
ATES
He,
29398
Bane
Pa
pe
ag
ne
TE
BE
i
Bs
eee
gs
ror
ur
BER”
a
Pea
AE
og
iPHeuEes
YH
o
war
FROM LEFT MIC JACK JI a Salis =

OSC. POWER P.C. BOARD (LE-5021)
TO PRE AMP P.C.BOARD To sw9
De 1S8308eoa7 ATK
om
‘ 8
. 1 3.08 ere ote ee &
é J aie Ts a
I
ae
NK
Na
ren
HH
: a
Fj
5
} TRe 28c971(23) _ TRS 2scaTi
‘, a a 3 ry 3.
\ < ¥ sLe
RED
cl 9
t
O
nwt
avaK
neo
=.
Oo
0°
ons
aw
To swo.
TO PRE AMP P.C,BOARO———>—
FROM SWS:
TO CHASSIS:
FROM TRANSFORMER

SECTION 2
PARTS
LIST
TABLE
OF
CONTENTS
FIG.1
HEADBLOCK
..........0.....
0.
0c
c
ccc
eee
uees
21
FIG.2
SUPPLY/TAKE-UP
REEL
TABLE
BLOCK
.........
23
FIG.3
MOTOR
BLOCK
.....-.-.-....
ccc
cece
cece
ee
eves
24
FIG.4
FLYWHEEL/BELT
CHANGE
LEVER
BLOCK
.------.
25
FIG.
§
SWITCH
BLOCK
-
.--
660-0
0
eee
ee
en
eee
ees
26
FIG.6
MECHANISM
ASSEMBLY
BLOCK
..-...-..--..----
28
FIG.7
PRE-AMP.
P.C.
BOARD
(LE-5022)
BLOCK
....-...-
29
FIG.8
OSC.
POWER
P.C.
BOARD
(LE-5021)
BLOCK
-..-----
30
FIG.9
AMP.
ASSEMBLY
BLOCK
---------..-.-002020005-
30
FIG.
10
FINAL
ASSEMBLY
BLOCK
.--.----.-..-2..-0-00--
33
INDENS
fort
eters
Sea
oe
ee
ere
ee
ea
tien
al
poe
eas
34

HOW
TO
USE
THIS
PARTS
LIST
1.
This
parts
list
is
compiled
by
various
individual
blocks
based
on
assembly
process.
2.
When
ordering
parts,
please
describe
parts
number,
seria!
number,
and
model
number
in
detail.
3.
How
to
read
list.
—The
reference
number
corresponds
with
illustration
or
photo
number
of
that
particular
parts
list.
———This
number
corresponds
with
the
Figure
Number.
——-Thig
number
corresponds
with
the
individual
parts
index
number
|
in
that
figure.
|
eo
|
s——~+-~A
small
“x”
indicates
the
inability
to
show
that
particular
part
a
ate}
in
the
Photo
or
Mlustration.
1Z-11
X
p>>
Schematic
Diagram
Number
of
individual
|
manufactured
part.
|
(not
required
for
parts
order)
4
r~-
Quantity
of
particular
part
required.
a
i)
t
"
Ref.
No.
Parts
No.
Description
Schematic
No.
QULy
i FLYWHEEL BLOCK #13
f
y2-$18x
800425
Flywheel
Block
Assy,
Comp.
BOGIES
4
4
12-116
244806
Fiywheel
Only
RIY-233
1
i
12-117x
244754
Felt,
Flywheel
KU}
225
t
#
12-118
251324
Main
Metal
Case
RD-236
}
a
12-119
253080
Main
Metal
1)
237
\
.
The
symbo!
numbers
shown
on
the
PC.
Board
list
can
be
matched
with
the
Composite
Views
of
components
of
the
Schematic
Diagram
or
Service
Manual.
.
The
indications
of
Resistors
and
Capacitors
in
the
photos
of
P.C.
Board
are
being
eliminated.
.
The
shape
of
the
parts
and
parts
name,
etc.
can
be
confirmed
by
comparing
them
with
the
parts
shown
on
the
Electrical
Parts
List
Table
of
P.C.
Board.
Both
the
kind
of
part
and
installation
position
can
be
determined
by
the
Parts
Number.
To
determine
where
a
parts
number
is
listed,
utilize
Parts
Index
at
end
of
Parts
List.
It
is
necessary
first
of
all
to
find
the
Parts
Number.
This
can
be
accomplished
by
using
the
Reference
Number
listed
at
right
of
parts
number
in
the
Parts
Index,
(meaning
of
ref.
no.
outlined
in [tem 3
above).
.
Utilize
separate
“Price
List
for
Parts”
to
determine
unit
price.
The
most
simple
method
of
finding
parts
Price
is
to utilize
the
reference
number.

ELECTRICAL
PARTS
LIST
TABLE
WFe~e
‘Trimmer Condenser
1
2
stopper
Type|
3
|
r
and
capacitors
in
the
P.
C.
Board
-
photos
are
being
eliminated,
please
i
Confirm
parts
name
and
shape
by
Comparing
them
with
the
parts
shown
in
this
table
Solid
Resistor
Carbon
Resistor
Metal
Oxide
Film
Resistor
4
5
é
>
Cement
Resistor
Wire-Wound
Resistor
Thermistor
Enamel
Resistor
1
2
3
4
~~
arse.
|
1
aad
~
|
}
or
(Tubler
Type)
Plastic
Capacitor
Mylar
Capacitor
VEM
(Hi-Q)
Capacitor
5
6
1
8
Vertical
Type
Tg
B
|
tupiertype
4%
PY
if
i
Mylar
Capacitor
Tantalum
Capacitor
Oil
Capacitor
(Tubler
Type)
Styrol
Capacitor
5
Vertical
Type
|
14
Naas,
|
|
1
i
Flectrolytic
Capacitor
(Tubler
Type)
Electrolytic
Capacitor
Ceramic
Capacitor
Metalized
Mylar
(Paper)
Capacitor
VR es
ar
TR
cR
Dd
i
ae
AMOS
an
yy
PSS
19

ILLUSTRATION
OF
HEAD
BLOCK
|
FIG. 1
35— ea ae es et Ty oe Na aire ian eames owa uaa
4 5—-—.-—-—— Sa a a ee. PALS
20