Elmo ST-1200 User manual

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BLlW:D
SERVICE MANUAL
ST-1200
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ELMO CO., LTO.
NAGOYA, JAPAN

TABLE
OF CONTENTS
Rear Arm •••••••••••••••••••••••••••
Take-up Guide
Lens Holder ••••••••••••••••••••••••
A.
B.
I. DISASSEMBLY
FRONT & REAR ARM
1. Front Arm
2.
3.
PROJECTION LAMP & LENS
1. Heat Proof Glass
2. Projection Lamp
3.
Page
1
3
4
5
6
7
Drive Belt
Switch Mechanism •••••••••••••••••••
Clutch •••••••••••••••••••••••••••••
C.
D.
TRANSFORMER & MOTOR
1• T ran s form er ••••••••••••••••••••••••
2. Motor ••••••••••••••••••••••••••••••
3.
4.
5.
MACHINE FRAME
1. Machine Frame ••••••••••••••••••••••
2. Second Sprocket ••••••••••••••••••••
8
9
10
11
12
13
14
E.
SOUND
1.
2.
3.
4.
Amplifier ••••••••••••••••••••••••••
Head Base Plate ••••••••••••••••••••
Sound Lens •••••••••••••••••••••••••
Sound Head •••••••••••••••••••••••••
II. TROUBLE SHOOTING
15
16
17
18
A.
B.
C.
D.
E.
lfRONT & REAR ARM ••••••••••••••••••••••••••••
PROJECTION LAMP & LENS
TRANSFORMER & MOTOR •••••••••••••.•••••••••••
MACHINE FRAME
SOUND •••••••••••••••••••••••••••.••••••.••••
19
20
21
23
26
CONNECTING DIAGRAM FOR MACHINE •••••••••••••••••• 31
SCHEMATIC DIAGRAM FOR MACHINE ••••••••••••••••••• 32
SCHEMATIC DIAGRAM FOR AMPLIFIER ••••••••••••••••• 33
VOLTAGE CHECKING POINTS ON THE CIRCUIT PLATE 34

I • DISASSEMBLY & ASSEMBLY
A. FRONT & REAR ARM·
1. FRONT ARM (Fig. 1)
Fig. 1
DISASSEMBLY
1. Take out attaching screws (Fig.l-l,x2) and remove Front arm.
2. Take out Reel shaft pins (Fig.1-2,x2) and remove Reel shaft assy.
3. Take out attaching E-ring (F~g.1-3) and remove Reel shaft gear.
4. Take out attaching screws (Fig.1-4,x2) and remove Arm gears (x2).
5. Take out Arm gear shafts (Fig.1-5,x2) and remove Arm gears (x2).
ASSEMBLY
1. As to the assembling, follow the reverse way of the above steps.
2. Lubricate all the gears with aluminum grease.
NOTE: In comparison with the rear arm, Front arm, Front arm base plate
and Front arm shaft gear are fundamentally different, but
otherwise same.
-1-

2. FRONT ARM (Fig. 2)
Fig. 2
DISASSEMBLY
1. Take out attaching E-ring (Fig.2-1).
2. Take out attaching screws (Fig.2-2,x2) and remove Spring adjusting collar,
Reverse slip spring, Pulley washer, Reverse middle gear 2, Friction plate
1, Reverse middle gear 1 and Reverse gear boss.
3. Take out attaching E-ring (Fig.2-3) and remove Rewind gear.
4. Take out attaching E-ring (Fig.2-4) and remove Reverse middle gear 3 as
well as Sprocket shaft pin inserted.
5. Take out attaching E-ring (Fig.2-5) and remove Rewind gear holder.
6. Take out attaching screw (Fig.2-6) and Arm lock spring, then pullout
Front arm assy.
ASSEMBLY
1. As to the assembling, follow the reverse way of the above steps.
2. Lubricate all the gears with Alvania grease.
3. Adjust the rewinding tension of the front arm to be 75 gr. by the position
of Spring adjusting collar. Rewinding tension •• Tolerance 65-90 gr.
4. The rewinding time should be within 100 sec. with 400 feet reel.
NOTE: Pay attention for the attaching direction of gears.
-2-

3. REAR ARM (Fig. 3)
Fig. 3
DISASSEMBLY
1. Take out attaching screw (Fig.3-1) and remove Take-up middle pulley 2,
Take-up pulley washer and Take-up belt.
2. Take out attaching screw (Fig.3-2) and remove Spring adjusting collar,
Rear pulley shaft spring, Pulley washer, Rear take-up gear and Friction
plate 2.
3. Pullout pin (Fig.3-3) and remove Friction wheel pulley.
4. Take out attaching screw (Fig.3-4) and Arm lock spring, then pullout
Rear arm assy.
ASSEMBLY
1. As to the assembling, follow the reverse way of the above steps.
2. Lubricate Take-up pulley washer and the teeth of Take-up middle pulley 2
with Alvania grease.
3. Adjust the take up tension of the rear arm to be 65 gr. by the position
of Spring adjusting collar. Take up tension ••• Tolerance 55-80 gr.
NOTE: When replace Take-up belt, take out just attaching screw (Fig.3-1).
-3-

4. TAKE-UP GUIDE (Fig.4)
Fig. 4
DISASSEMBLY
1.
Take
out attaching
screws
(Fig.4-1,x2)
and remove Film guide 4.
2.
Take
out attaching
screw (Fig.4-2)
and
remove Take-up guide roller 1.
3.
Take out Take-up guide
shaft (Fig.4-3)
and remove Take-up guide and
Take-up lock spring.
4. Take out attaching screw (Fig.4-4) and remove Release switch presser.
ASSEMBLY
1. As to the assembling, follow the reverse way of the above steps.
2. All the rollers should rotate smoothly.
-4-

B. PROJECTION LAMP & LENS
1. HEAT PROOF GLASS (Fig. 5)
Fig. 5
DISASSEMBLY
1. Push lamp cover stopper (Fig.5-1) and take off Lamp cover.
2. Straighten out the latches (Fig.5-2,x4) of Heat proof glass holder and
take out LC heat proof glass and Heat proof glass presser.
ASSEMBLY
1. As to the assembling, follow the reverse way of the above steps.
2. When replace LC heat proof glass, of which divided crack should not be
captured by the latches of Heat proof glass holder.
-5-

2. PROJECTION LAMP (Fig. 6)
Fig. 6
REPLACEMENT
1. Pullout Lamp socket assy (Fig.6-1) from Lamp.
2. Hold the Lamp presser (Fig.6-2) of Lamp holder (2) assy and pullout Lamp.
3. To install a replacement Lamp, place the square base of Lamp into the
hollow and push the reflector into the metal rim of Lamp holder (2) assy.
4. To obtain the sufficient screen brightness, first loosen attaching screws
(Fig.6-3,x4) and move Lamp fixing plate and Lamp holder (2) assy back and
forth or up and down, until most bright and leveled screen brightness can
be accomplished.
5. Screen brightness of the high position should be satisfied undermentioned
specification.
NOTE:
Screen Center
Screen Corner
800 Lx. min.
50% of the center brightness
1. Do not touch inside of the Lamp reflector as well as Lamp itself.
2. Replacing Lamp, first disconnect Power cord.
3. Life of the Lamp installed is averaged 35 hours under normal projection.
4. Applied voltage to the lamp should be 14.3-15V A.C. on high position and
12.3-13V A.C. on low position, under the lamp lighting condition.
-6-

3. LENS HOLDER (Fig. 7)
Fig. 7
DISASSEMBLY
1. Turn Focusing knob fully clockwise and pullout Projection lens.
2. Take out attaching screws (Fig.7-1,x2) and remove Pressure plate assy and
Pressure plate spring.
3. Take out attaching screws (Fig.7-2,x4) and remove Pressure plate holder.
4. Strip off Focusing plate (Fig.7-3).
5. Take out Lamp socket holder screw (Fig.7-4) and remove Focusing knob.
6. Take out attaching screws (Fig.7-5,x2) and Focusing guide pin, then remove
Focusing cam mount, Tube, Focusing spring and Focusing cam.
7. Take out attaching screws (Fig.7-6,x2) and remove Lens holder assy.
ASSEMBLY
1. As to the assembling, follow the reverse way of the above steps.
2. Lubricate Focusing cam with permalub H3002 grease.
3. Lens holder assy should not only smoothly move back and forth but also be
certainly locked by Click spring.
4. To align the optical axis, first pass the focusing test film and either
tighten or loosen attaching screw (Fig.7-7) to obtain evenness in focusing.
Then, secure the screw with screw-tight.
NOTE: Attach Focusing cam mount as the stopper (Protuberance) of Focusing cam
mount
towards lower side.
-7-

C. TRANSFORMER & MOTOR
1. TRANSFORMER (Fig. 8)
@ ~ -Brown
Black
Blue
~ 2
i
1Yellow Green
Blue White Green Yellow Blue
Blue Skyblue
Fig. 8
REPLACEMENT
1. Unsolder the end of the wires connected to Transformer terminal (Fig.8-1)
and Terminal 2 (Fig.8-2).
2. Take out attaching screws (Fig.8-3,x4) and replace Transformer.
White Green
l~~~-~I~ ~-~~~~I~e
Skyblue Brown
Blue
Blue
-8-

2. MOTOR (Fig. 9)
Fig. 9
DISASSEMBLY
1. Remove Transformer. (Refer to page 8)
2. Take out AMP assy. (Refer to page 15)
3. Take out attaching screws (Fig.9-1,x4) and (Fig.9-2), and remove Motor
unit assy.
4. Loosen attaching screws (Fig.9-3,x2) and pullout Pulley unit (just Pulley
50 Hz or with Pulley 60 Hz).
5. Straighten out the latches (Fig.9-4,x8) of Fan casing 3 and remove Fan
casing 2 and Fan casing 3.
6. Loosen attaching screws (Fig.9-5,x2) and pullout Fan.
7. Take out attaching screws (Fig.9-6,x2) and remove Fan casing 1.
ASSEMBLY
1. As to the assembling, follow the reverse way of the above steps.
2. Fan should not be interrupted by Fan casing 1,2,3.
-9-

3. CLUTCH (Fig. 10)
4
1
Fig. 10
DISASSEMBLY
1. Take out attaching screws (Fig.lO-l,x2) and remove Clutch unit assy and
Drive belt.
ASSEMBLY
1. Hang Drive belt on Clutch unit assy and push against Base frame.
2. To do this, first join Clutch lever (1) assy (Fig.10-2) and Clutch link (1)
either Safety shutter (Fig.lO-3) and Safety shutter presser as indicated
in Fig. 10 to achieve respectable movement, and tighten attaching screws
(Fig.lO-l,x2).
3. If Safety shutter could not keep off from the optical axis of the screen
during Motor switch knob positioned F or R, loosen attaching screw (Fig.
10-4) and adjust the position of Safety shutter presser.
4. If Clutch unit assy could not convey the rotation of Motor assy during 18
fls or 24 fls projection, loosen attaching screws (Fig.lO-5) or attaching
nut (Fig.lO-6) and adjust the position of Clutch link adjuster and Clutch
lever (2) assy.
-10-

4. DRIVE BELT (Fig. 11)
4
1
Fig. 11
REPLACEMENT
1. Loosen attaching screws (Fig.11-7,x2) and move Pulley 50 Hz or with Pulley
60 Hz towards Fan.
2. Take out attaching screw (Fig.11-8) and remove Idler holder, then replace
Drive belt.
3. Move back Pulley 50 Hz so that Drive belt and Pulley 50 Hz could line up in
a straight line, and tighten attaching screws (Fig.11-7,x2).
4. Attach Idler holder to obtain adequate tension of Drive belt and tighten
attaching screw (Fig.11-8).
5. Drive belt should not be twisted.
-11-

5. SWITCH MECHANISM (Fig. 12)
Fig. 12
DISASSEMBLY
1. Pullout knobs (Fig.12-1,x3) such as Motor switch, Volume control and Tone
control knobs. To do this, Motor switch knob should be positioned F.
2. Take out attaching screws (Fig.12-2,x3) and remove Switch panel.
3. Unsolder the end of the wires (x2) connected to Release switch (Fig.12-3).
4.
Take
out attaching
screw
(Fig.12-4)
and
remove
Pilot lamp holder.
5. Take
out attaching
screw
(Fig.12-5)
and remove
Switch cover.
6. Unsolder
the end of the wire connected to Micro switch V-2A
(Fig.12-6).
7.
Take out
attaching screws (Fig.12-7,x3) and pullout Switch
assy.
ASSEMBLY
1. Pullout AMP assy. (Refer to page 15)
2. Attach Switch assy to Base frame. To do this, first, JOln Switch cam and
both Reverse lever and Clutch lever (3) as indicated in Fig. 12, and
tighten attaching screws (Fig.12-7,x3).
3. Attach AMP assy.
4. To complete the rest, follow the reverse way of the above steps.
(Disassembly: 6, 5, 4, 3, 2, 1)
-12-

D. MACHINE FRAME
1. MACHINE FRAME· (Fig. 13)
Fig. 13
DISASSEMBLY
1. Take out attaching screws (Fig.13-l,x2) and remove Threading knob holder.
2. Take out attaching E-ring (Fig.13-2) and remove Changing gear as well as
Sprocket shaft pin, then remove Changing holder from Sprocket shaft (1).
3. Unsolder the end of the wires (x2) connected to Solenoid assy (Fig.13-3)
and loosen attaching screw (Fig.13-4), then remove the wires (x2) from
cord supporter.
4. Take out attaching screws (Fig.13-5,x3) and pullout Machine frame assy.
ASSEMBLY
1. Attach Machine frame assy of which Loop former should be released and
tighten attaching screws (Fig.13-5,x3) strong enough.
2. Solder the end of the wires (x2) to Solenoid assy (Fig.13-3) and hold the
wires by Cord supporter, then tighten attaching screw (Fig.13-4).
3. Insert Changing holder to Sprocket shaft (1). To do this, join the "U"
shaped hollow to Changing plate lock (1) as indicated in Fig.13.
4. Attach Sprocket shaft pin and Changing gear, and clasp attaching E-ring
(Fig. 13-2).
5. Attach the Threading knob holder with attaching screws (Fig.13-1,x2) so
that pulled-out Threading knob could complete the single frame feed.
-13-

2. SECOND SPROCKET (Fig. 14)
Fig. 14
DISASSEMBLY
1. Take out attaching screws (Fig.14-1,x2) and remove Film guide 4.
2. Take out attaching screw (Fig.14-2) and remove Sprocket presser and
Sprocket presser washer.
3. Pullout Second sprocket boss (Fig.14-3) as directed by the arrow in
Fig. 14 and take out attaching screw (Fig.14-4), then remove Second
sprocket cap and Second sprocket.
ASSEMBLY
1. Attach Second sprocket and Second sprocket cap and pullout Second
sprocket shaft as directed in Fig. 14, then tighten attaching screw
(Fig.14-4).
2. To carry out the rest, follow the reverse way of the above steps.
(Disassembly: 2, 1)
NOTE: Even if attaching screw (Fig.14-4) would be loosened or tightened
without performing pulled out Second sprocket shaft, wow in sound
reproduction might be developed.
-14-

E. SOUND
1. AMPLIFIER (Fig. 15)
Fig. 15
DISASSEMBLY
1. Pullout Volume control knob and Tone control knob.
2. Take out attaching screws (Fig.15-I,x2) and remove AMP decoration plate.
3. Take out attaching screw (Fig.15-2) and pullout AMP assy.
4. Disconnect the connector pin of the wires (Fig.15-3,4,5,6) and remove AMP
assy.
ASSEMBLY
1. Connect the connector pin of the wires (Fig.15-3,4,5,6) to AMP assy.
2. Position Motor switch knob F and attach AMP assy to Base frame so that
Switch cam and Recording knob assy could cooperate.
3. Attach AMP decoration plate and tighten attaching screw (Fig.15-1,x2)
(Fig.15-2) temporarily.
4. Fit AMP assy so that a click of Micro switch could not be made while Motor
switch positioned S, but a click of Micro switch could be made while Motor
switch positioned F besides being Recording knob pushed.
5. Attach Volume control knob and Tone control knob.
-15-

2. HEAD BASE PLATE (Fig. 16)
»<
...Y"
Fig. 16
DISASSEMBLY
1. Take out attaching screws (Fig.16-1,x2) and remove Loop setter holder.
2. Take out attaching screws (Fig.16-2,x2) and remove M-O changing holder.
Optical guide and Optical guide spring come off this time.
3. Take out attaching screw (Fig.16-3) and remove Sound drum.
4. Take out attaching nuts (Fig.16-4,x2) in turn and remove Pad roller lever.
5. Unsolder the end of the wires (Fig.16-5,x2) connected to Sound head and
Erasing head.
6. Disconnect the connecting pin of the wire (Fig.16-6) on AMP assy side.
(Refer to page 15)
7. Take out attaching screws (Fig.16-7) and remove Head base plate assy.
ASSEMBLY
1. As to the assembling, follow the reverse way of the above steps.
2. Attach Head base plate assy so that Reverse lever (1) and Reverse lever
could join to cooperate.
-16-

3. SOUND LENS (Fig. 17)
1
4
Fig. 17
REPLACEMENT
1. Remove Exciter lamp.
2. Remove Pad roller lever. (Refer to page 18)
3. Loosen attaching screw (Fig.17-1) and pullout Sound lens assy.
Insert replacement Sound lens assy of which window to be parallel to the
optical axis as illustrated (Fig.17-4).
4. Install Exciter lamp.
5. Light Exciter lamp and first loosen attaching screws (Fig.17-2,x2)
slightly and either tighten or loosen attaching screw (Fig.17-3) to
adjust the slit image through Sound lens can be screened in the center
of Silicon photo diode.
6. Attach Pad roller lever.
7. Pass the optical focusing test film (4000 Hz).
8. Connect both the resistor (8 ohms, lOW) and the voltage meter
(AC 10V max.) parallel to the output terminals of the amplifier
(Extension speaker cord terminal).
9. Run the projector, move Sound lens back and forth to search the position
where the output voltage is maximized, under Volume control knob
positioned somewhat below max.
10. Secure all the attaching screws by screw-tight.
-17-