Tensai TD-860B Mounting instructions

SERVICE DATA
Model
TD-860B
SPECIFICATIONS
Type
:
2-speed,
belt
drive
auto-return
record
player
Turntable
Platter
:
300mm,
aluminium
alloy
diecast
Motor : One 4-pole synchronous motor
Power Source &
Consumption : AC 220V 50Hz 10W, 240V 50Hz 10W
Speeds : 33-1/3 45 rpm
S/N Ratio : 60dB
Wow & Flutter : 0.08% (WRMS)
Pickup
Arm
:
Static-balanced
type
tubular
arm
Arm Length >: 215mm
Overhang : 10mm
Standard Accessories : 45r.p.m. adapter
Oil
Operating instructions
Dimensions : 429 (W) x 366 (D) x 148 (H) mm
Weight
:
5Kg
(net)

CONTENTS
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DISASSEMBLY *=2i: ons eae ee tate cess
ADJUSTMENTS <-coccccecccc cece etree eeececeeen eens
MAINTENANCE: ----cccececececceeecee cece e reece ees
TROUBLE-SHOOTING
GUIDE
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SCHEMATIC
DIAGRAM:
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EXPLODED VIEW-<:-ccccccccecece cece eee ee ee eee ees
PARTS: LIST fe2eors keene ead
DISASSEMBLY INSTRUCTIONS
To remove Dust cover (Figure 1)
1. Open the Dust cover.
2. Slide the hinge as illustrated.
To remove Bottom board
1. Remove eight screws on the Bottom board and
remove the Bottom board assembly.
2.
It’s
possible
to
service
from
the
bottom
of
the
unit.
To remove and replace Drive belt (Figure 2)
1. Removal of belt
(A) Remove the rubber mat. Disengage the belt from
the Belt guide and Motor pulley through the
cutout in the Turntable platter.
(B) Hold the belt with your finger through the cutout
in the Turntable platter and pull the Turntable
platter up from the Center shaft.
2. Replacement of Drive belt (Figure 3)
(A)
Hold
the
belt
with
your
left
thumb
through
the
cutout
provided
in
the
Turntable
platter.
Place
the
belt
on
the
inner
drum
of
the
Turntable
platter.
(B)
Hold
the
Turntable
platter
horizontally,
insert
it
on
the
Center
shaft
carefully
and
engage
the
belt
with
the
Motor
pulley
making
sure
that
the
belt
is
not
twisted.
Release
your
left
thumb
from
the
belt.
(C) Engage the belt with the Belt guide.
(D) Put the rubber mat in place.
eae V7 Dust Cover
ee RS
Pn Hinge
Figure 1
Motor Pulley
/ the turntable
platter
Sy Center Shaft
) ad
Wine as
Turntable Platter. Figure 2
Belt Inner drum
Figure 3

ADJUSTMENTS
Adjustment
of
Arm
lifter
height
(Figure
4)
1.
To
adjust
height
of
stylus
tip
when
using
the
cueing,
loosen
the
Set
screw
of
the
Arm
lifter.
Adjust
the
height
of
the
Arm
lifter
so
that
the
distance
between
the
stylus
tip
and
record
is
about
8mm
when
a
record
is
placed
on
the
Turn-
table
platter.
After
the
adjustment,
tighten
the
Set
screw
se-
curely.
Adjustment
of
motor
pulley
height
(Figure
5)
1.
After
replacing
motor
or
motor
pulley,
check
the
height
of
the
motor
pulley.
Allign
the
center
of
the
33
rpm
or
45
rpm
pulley
with
the
center
of
the
belt
guide
(with
speed
selector
in
corresponding
positions),
and
then
tighten
the
mounting
screw.
The
motor
pulley
should
then
be
approximately
2.5mm
above
the
motor.
Adjustment of auto-return (Figure 6)
If
the
pickup
arm
moves
up
and
performs
auto
re-
turn
operation
after
the
end
of
the
performance
rotate
adjusting
screw
C
counterclockwise.
If
the
pickup
arm
auto
matically
returns
before
the
end
of
the
performance,
rotate
screw
C
clockwise.
MAINTENANCE
Whenever
a
Turntable
platter
is
brought
in
for
service
or
repair.
It
should
be
cleaned
and
lubricated.
1.
Lubrication (Figure 7)
Remove
the
Turntable
platter
as
described
previ-
ously
in
“Removal
of
Belt”
and
apply
three
or
four
drops
of
oil
to
the
point
shown
in
figure
7.
Be
sure
to
avoid
contact
with
the
pulley
or
belt
when
lubricating.
If
these
become
oily,
wipe
clean
with
soft
cloth
dipped
in
ethyl
alcohol.
Cleaning
of
Drive
mechanism
Clean
the
Motor
pulley,
belt
and
inner
drum
of
Turntable
platter
with
soft
cloth
dipped
in
ethyl
alcohol.
Dirt
on
these
parts
may
cause
wow,
flutter
and
cumble.
4
OIL
Oo
—
Figure 7
Setscrew
Figlife
A
I
se
Pull
Belt
Guide
Motor
Pulley
ra
Pulley
mounting
screw
Figure
5
F
]
Micro
switch
L
Figure
6
4

TROUBLE-SHOOTING GUIDE
Turntable
Trouble
Cause
Remedy _
Slow rotation.
1. Oitor dirt on belt (10) causing slippage
1. Clean the motor pulley (6) belt (10)
with alcohol.
Abnormal high temperature of motor.
Siow rotation,
2. Center shaft {17) is binding. 2. Dissasembly and clean then apply
lubricant.
3. Beit touches the belt guide. (28) 3. Push the top of the motor pulley (6). If
this does not remedy, adjust the height of
the pulley (6)
Excessive
variation
of
rotation.
1.
Oil
or
dirt
on
belt
(10),
causing
slippage
1.
Clean
the
motor
pulley
(6)
and
belt
(10)
with alcohol.
2. Loose beit (10). 2. Replace belt (10).
Improper interchanging function of belt. 1. Oil or water on driving mechanism. Same as above.
ee a __| 2. Loose belt (10). 7 $a. _ at
_ Trouble —~sd,:=C;s Cause _ ___ Remedy
1. No power to motor {5). 1. Check leads of power circuit, plug,
power switch.
2. Motor coil is open, shorted or burned. 2. Replace.
1, Poor insulation of the inside of motor (5).
1.
Pickup arm
/ Trouble Cause Remedy |
Stylus causes jumping or improper 1. Stylus pressure too light. 1. Adjust for specified pressure.
tracking. 2. Stylus worn out of damaged. 2. Replace stylus.
3. Horizontal movement of pickup arm 3. Disassemble the pickup arm shaft and clean.
(42) is heavy.
4. External vibration. 4. Install the player where there is no
vibration.
5. Cartridge (43) case touches the surface 5. Excessive stylus pressure. Adjust for
of record. specified value.
L.
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od
2 2
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ae
oS
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Es
ba
Pa
piahhich
bol
betet
ead
has
J
Sound
Trouble | Cause Remedy
No sound, or only from one channel. 1. Cartridge (43) circuit open. 1. Replace cartridge. (43) Repair leads.
2. improper connection of head shell 2. Correct the connection.
and pickup arm (42). Check that the connected part is free
H from oil, dust, etc. and clean.
3. Open lead between head shell and 3. Replace the lead (if the pickup arm (42)
| output cord or mis-wiring. lead is open, replace the pickup assembly)
or correct wiring.
Distorted sound. 1. Stylus worn out or damaged. 1. Replace stylus.
2. Cantilever bent. 2. Reptace styius.
I 3. Stylus pressure too light or heavy. 3. Adjust for specified pressure.
Rumble. 1. Motor touches the motor sheet (7). 1. With the motor transit screw removed,
press the top of the motor pulley (6) so
that the motor (5) is floating on the
rubber cushion,
2. Oil or dirt on beit. (10) 2, Clean the motor pulley, belt (10) and
turntable with alcohol.
3. Belt touches the belt guide. (28) | 3. Press the top of the motor pulley (6). If
this does not remedy, adjust the height of
the motor pulley. (6)
Wow. 1. Oil or dirt on belt. (10) 1. Clean the motor pulley (6), belt and
turntable platter (11) with alcohol.
Hum. 1. Cartridge (43) is affected by / 1. Keep any equipment such as motor (5) or
magnetic field. transformer away from the player.
2. Inperfectly connection of DIN ptug. 2. Connect DIN plug perfectly.
Howling. 1. Cartridge picks up vibration or sound 1. Install the player on a rigid table or change
pressure from speaker. the turntable location until howling is
minimized.

SCHEMATIC DIAGRAM
For 220V /50Hz
AC POWER
wear z BRN
MICRO SWITCH
YEL
RED
WHT
C: Metallized Peper Capaciter 0.047 ,,F 250V M
R: Composition Resistor 4.7 Ohms 1/2W K &
For 240V/50Hz a ee a. _
i
AC POWER
Om"
O Oo
onl
4 x=
i
4 s
MICRO SWITCH
BRN
YEL
mee Eb
RED
WHT
©
MOTOR (RN) MICRO SW (WHT)
| MOTOR WHT)
Meee) <8} G>, © ss 4-mIcro sw (RED)
MOTOR (YEL)
POWER CORD power CORD

EXPLODED VIEW
fo
———
in
Sas

PARTS LIST
Key No. | Part No. Description Key No.! Part No. Description
1 20847911 Cabinet 61 20741793 Rejecter Base
2 20826743 Bottom Board Assembly 63 20738654 | Pickup Rest Assembly
3 20847934 | Dust Cover 65 20746853 | P.C. Board Stay
4 20861690 | Hinge 66 20975612 | Band
5 22125540 | Motor 67 22184125 | Clamp Lug
6 20716702 | Motor Pulley 70 20871866 | Knob
7 20743940 | Motor Sheet 71 20741741 | Lifter Knob
8 20881722 | Rubber Cushion 73 20723649 | Rubber Mat
9 22166232 | Lug Cord 74 22185131 | Bush (For 240V)
10 20728611 | Belt 22185129 | Bush (For 220V)
11 20723683 | Turntable Platter 75 20881802 | Bush
12 22711785 | Chassis 76 22184148 | Cord Clamp
13 22854659 Switch Screen 77 20705634 Pull Spring
ie 20746861 | Chassis Stay 78 20753933 | Rejecter Plate :
15 20754626 Connecter Plate 79 20757701 Return Cam
16 20753934 Selecter Plate 80 20707691 Rejecter Pole
17 20725689 Center Shaft 83 22754857 Ball Holder
18 | 20725660 | Table Bearing 84 83090372 | Stee! Ball 5/32
19, © | 20798631 || “Special Nurs 85 20753932 | Switch Plate
20 20773767 | Gear Bearing 86-1 |22176529 | Power Cord (For 220V)
21 20764702 | Return Rod 86-2 |22177068 | Power Cord (For 240V)
22 22752858 | Special Washer 87 20753888 | Seesaw Lever Assembly
23 20751753 Rejecter Lever Assembly 88 20861691 Hinge
24 20746737 | Gear Stopper 89 22748761 | Barrier
25 20763824 | Stopper Shaft 90 22184166 | Cord Clamp
26 22771966 | Pull Spring 91 20731771 | Main Weight
28 22743554 | Belt Guide 92 20731872 | Head Shell
29 20751705 | Guide Bracket 93 22184156 | Clamp Cord
30 20727638 | Main Gear 94 20731836 | Canceller Weight
31 20751704 | Auto Trip $10 20791937 | Special Washer
32 20754667 | Clutch
33 74090318 | Steel Ball 1/8
34 20751777 Pickup Plate Assembly
35 20753931 | Auto Lever
36 20757686 | Lifter Cam
37 20753884 | Lifter Lever Assembly
38 20735641 Pickup Stand
39 20764685 | Canceler Pole
40 20761658 Lifter Bar Assembly
41 20764671 Lifter Shaft
42 20731828 | Pickup Arm
43 22155326 | Cartridge
44 22143107 | Supply P.C. Board
45 22330114 | Metallized Paper
Capacitor 0,047pF/250V
46 22547479 | Composition Resistor
4.7 ohm, “AW
47 22146335 | Micro Switch
49 22161510 | Terminal 2E2
50 22164765 | Plug Cord USIP
51 22755518 | Cord Support
53 22764686 | Shaft
54 20746631 | Cushion Holder
57 20707692 | Torsion Spring
58 22771961 Push Spring
60 20741783 | Selecter Base