Technics SL 1300 Service Manual

Page 1

as Technics

88 I M I Hl-FI COMPONENTS
WIDE anua

MODEL 8 L-1300

SPECIFICATIONS
TURNTABLE SECTION
Type: Automatic player system with MEMO-REPEAT
Driving method: Direct drive
Turntable Plater: Aluminium die-cast; 33 cm (13") diameter
250 l Turntable Speeds: 33-1/3 and 4S r.p.m.
Motor: Ultra low-speed brushless DC motor
Power Supply: 50/60 Hz AC llOV/120/220/240V. 4W
Speed Change Method: Electronical change
Variable Pitch Control: Individual adjustment by variable resistor, 10% adjustment range
Wow and Flutter: Less than 0.03% WFIMS
Rumble: ~50d8 (DINA). -70 d8 (DIN 8)
Build-up Time: Within 1/2 rotation at 33-1/3 r.p.m.
Dimensions: (W) 45.3cm x (D) 36.6cm x (H) 13.9cm (17-13/16" x 14.13/32" x 5-1/ 2")
Weight: 9.4 kg (20.7 lb)
TONEARM SECTION
Type: Universal "S" shaped pipe arm, static-balanced type, direct reading stylus pressure
adjustment with, anti-skating force control devrce, cueing device.
Effective Length: 230 mm (9-1/16")
Overhang: 15 mm (19/32)
Tracking Error Angle Within 13° (at the pornt 150 mm (5-1/8") from the center)
Stylus PresSure: 0 -- 3 g

(Specilications. design and other details are subject to change, withOut prior notice,at any time in order to imporove perfromenoe)

MATSUSHITA ELECTRIC

. 6 MATSUSHITA ELECTRIC TRADING CO.. LTD.
ORDER NO 307408 42 P. O. Box 288. Central Osaka. Japan

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OPERATING PRINCIPLES

1.Starting operation (Figure 1)

1-1.
1-2.
1-3.

1-4.
1-5.
1-6.

1-7.
1-8.
1-9.

1-10.

1-11.

Pull the start/stop lever in the direction shown by the arrow A to the "START" position.

The start cam will then rotate, and start plates A and B will slide in the direction shown by the arrow 0.

The projection on start plate 8 causes the repeat cam to rotate in the direction shown by the arrow E.

At this time, the knob indication becomes "1".

The movement of the repeat cam causes the start setting plate to slide in the direction shown by the arrow F.

The start setting plate causes the switch lever to rotate in the direction shown by the arrow G.

The switch lever causes the switch button to be pushed in the direction shown by the arrow M. At this time, the switch
is in the on position.

The strobo-ligtt illuminates and the turntable rotates in the direction shown by the arrow J.

At the same time that the start cam rotates, the cut plate moves in the direction shown by arrow C.

The actuating plate spring is pressed by the tip of the cut plate and the actuating plate rotates in the direction shown by
the arrow H.

The movement of the tip of the actuating plate causes the friction link and the actuating link to rotate in the direction
shown by the arrow I.

The tip of the actuating link is pressed by the pinion shown by the arrow N. Thus, the pinion and the main gear are
interlocked.

2. Drive operation (Figure 2)

2-1.

2-2.
2-3.

24.
2-5.

The main gear rotates in the direction shown by the arrow N, and the operating plate slides in the direction shown by the
arrow 0, due to the action of the cam.

The arm lift' ls raised by the arm lift cam causing the stylus of the tonearm to be lifted

The actuating plate spring is pressed by the actuating plate resetting, pin, causing the actuating plate to move back in the
direction shown by the arrow 0.

Because the repeat pawl spring is extended, the repeat pawl latches ever a tooth of the ratchet wheel for the repeat cam.
The tip of the control latch for the tonearm contacts the start setting plate and rotates in the direction shown by the
arrow P, placing the Operating pin for the tonearm in between the notch of the steel ball with the spring for the control

latch supporting it.

3. Tonearm movement operation (Figure 3)

3-1.
3-2.

3-3.

3-4.

3-5.

3-6.

In the elongated hole of the Operating plate, the index moves in the direction shown by the arrow 2.
The bent portion of the index contacts the step portion of the select lever.
a) When the indication of the selector knob is at 30 cm, the bent portion of the index contacts step "a" of the select

lever.
b) When the indication of the selector knob is at 25 cm, the bent portion of the index contacts step "b" of the select

lever.
c) When the indication of the selector knob is at 17 cm, the bent portion of the index contacts step "c" of the select

lever.
The main gear rotates further and the operating plate slides in the direction shown by the arrow R, due to the action of

the cam.
The control latch for the tonearm pushes the operating pin for tonearm, causing the tonearm to move in the direction

shown by the arrow L.
The bent portion of the safety plate for the tonearm contacts the step portion of the index, causing the rotation to stop.

a) When the indication of the selector knob is at 30 cm, the bent portion of the safety plate contacts step f of the
index.

b) When the indication of the selector knob is at 25 cm, the bent portion of the safety plate contacts step "e" of the
index.

c) When the indication of the selector knob is at 17 cm, the bent portion of the safety plate contacts step "d" of the
index

The control latch for the tonearm moves, in the direction shown by the arrow U, out of the track of the operating pin

for the tonearm.

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7. Memory repeat operation (Figures 1 ~ 4)
74.

Set the indication of the memory repeat knob to number of times to be played.

7-2. The start setting plate will slide in the direction shown by the arrow F, due to the operation of the repeat cam.

7-3. The switch lever turns in the direction shown by the arrow G, setting the switch to the on position.

7-4. The turntable operates.

7-5. Set the start/stop lever to the "START" position by moving the lever in the direction shown by the arrow A.

7-6. The cut plate slides in the direction shown by the arrow C.

7-7. The actuating plate slides, pushing the actuating link and turning the main gear.

78. The operating plate slides, raising the lift and setting the index.

7-9. The control latch for the tonearm contacts the start setting plate, turning in the direction shown by the arrow P.

7-10. The repeat pawl meshes with the ratchet wheel attached at the repeat cam turning the ratchet wheel in the direction
shown by the arrow S. By this operation, one ratchet wheel tooth at a time will return, and the number of times
indicated by the repeat knob will reduce by one.

741. The tonearm turns in the direction shown by the arrow L, and its position is determined by the index.

7-12. The lift lowers, starting the play performance.

743. When the performance reaches the end, the main gear rotates.

7-14. The lift raises. and the tonearm turns in the direction shown by the arrow W.

7-15. The operation, as explained in 7-9 ~ 7-14, is repeated.

7-16. The indication of the repeat knob reaches 0. The start setting plate returns to its original position.

7-17. The tonearm turns in the direction shown by the arrow L, and its position is determined by the index.

7-18. The lift lowers, starting the play performance.

7-19. When the performance reaches the end, the main gear rotates.

7-20. The lift raises, and the tonearm turns in the direction shown by the arrow W.

7-21. Because the control latch for the tonearm doesnt contact the start setting plate, the tonearm is left on the rest.

7-22. The lift lowers, setting the switch to the off position, and the turntable stops its operation.

8. Continuous repeat
8-1.

Set the indication of the memory repeat knob to the R position.
8-2. The operations, as explained in 7-2 ~ 7-l4, will be repeated.

As for section 7-10, when the repeat knob indicates R, the ratchet wheel attached to the repeat cam has no tooth for

the remat pawl, and R is indicated continuously.

8-3. The unit continues to play until the repeat knob is returned to the 0 position.

ADJUSTMENT INSTRUCTION

1. Variable Pitch Controls

Turn this knob clockwise or counterclockwise. as necessary. to

reduce or increase the rotational speed of the turntable.

Clockwise rotation This increase the speed of the turntable

(+ dlreeIee) platter. Rotate clockwise it the strobo dots
seem to be Whack"; i.e.. seem to be
moving counterclockwise. When the dots
appear to be stationary. turntable speed is
accurate.

Counterclockwise rotation . This decreases the speed of the turn-

(- dlrectlon) table platter. Rotate counterclockwise if
the dots seem to be "running ahead"; i.e.,
seem to be moving clockwise. until they
appear stationary.

Each of the two turntable speeds (33-1/3 and 45 rpm.) can be

adjusted within a range of 10%.

2. Speed Adjustment Screws

ll. lor any reason. the adjustment cannot be successfully made
by the variable pitch controls. turn these screws clockwise or

counterclockwise with a ( -), tip screw driver.

Clockwise ............... The rotation of the turntable platter will be
slowed down.

Counterclockwise... The rotation will be speeded up.

Alter the adjustment has been made, the speed will not change

and re-adjustment will not be necessary.