Phase Linear 8000 Series Service Manual

Page 1

MODEL 8000 SERIES TWO
LINEAR MOTOR TURNTABLE

Page 2

8000 SERIES TWO
LINEAR MOTOR ARM STEREO TURNTABLE

SERVICE MANUAL

CONTENTS:
P- p.
1-0. SPECIFICATIONS. . . . . . . . 3 7-0. ADJUSTMENTS . . . . . .28
_ 7.1 D.D.Motor Operating
2 0. PANEL FACILITIES. . . . . . . Point Adjustment. .29
3-0' DlgAisgzggg: 7.2 Auto Lead-In Timing
' ' ' ' ' ' ° ' ' Adjustment. . . . . .29
3.2 Direct Drive Motor. . . 9 7.3 End Sensor Sensi-
3.3 Tonearm . . . . . . . . 9 tivity Adjustment . .29
3.4 CdS Detector & Lamp .10 7.4 End Timer Adjustment.30
4-0. PARTS LOCATIONS . . . . . . .11 5 Tracking Sensor Zero
5-0. BLOCK DIAGRAMS/OPERATIONS . .13 Pomt ' ' ' ' ' '30
5.1 Tonearm Control Stage .15 7.6 Tracking Sensor Gain
5.2 End Detector Stage. . .15 Adjustment. ' ' ' ' '31
7.7 Lead-In and Return
5.3 Arm EV Control Stage. .15 Speed Adjustment. . 31
5.4 Size Selector Stage .15 8-0. TIMING CHART
5.5 Repeat Control Stage. .16 9_0. TROUBLESHOOTING:
5.6 Lowering Position 9.1 Circuit Block . . . .35
Detector, Plunger .
Control Stage, and . 9.2 Mechanism Block . . .44
Descent Signal 10-0.EXPLODED VIEWS. . . . . .51
Generator . . . . . .16 10.1 Exterior. . . . . . .53
5.7 Display Stage and 10.2 Bottom (Base)Plate. .56
Plunger Driver. ' '16 10.3 Tonearm Assembly. . .59
'8 Manual Drive Stage. ' '16 10.4 EV Mechanism. . . . .61
9 Tracking Sensor Stage
and Tonearm Driver ll-O. PACKING. . . . . . .62
Stage . . . . . . . .16 12-0. PRINTED CIRCUIT BOARD
510 D.D.Motor Control ASSEMBLIES . . . . . . . .63
Stage and D.D.Motor
Stop Control. . . . . .16
6-0. CIRCUIT DESCRIPTIONS. . . . .18
6.1 Full Auto Logic . . . .18
6.2 Tonearm Drive . . . . .25

* * * k * 7t * *

THIS MANUAL IS INTENDED FOR USE ONLY BY QUALIFIED TECHNICAL SERVICE
PERSONNEL. HAZARDOUS VOLTAGES MAY BE ENCOUNTERED IN THE TEST AND
SERVICING OF THE SOOOII. USE EXTREME CAUTION; READ ALL INSTRUCTIONS.

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rest. As long as the tonearm remains off the arm rest, the

motor will continue to rotate. The phono motor control stage
employs three specially designed IC's: PAZOOS, PA2004, and

PDlOO3. These control stages also include the speed selector,

speed indicator, and quartz lock indicator circuits.

End detector

Lowering position
detector

Fig. 5-2

17

Page 41

9.1.8

l
Is the repeat FF (IC12)
inverted every time the _
repeat switch is pressed ?
lYES

Are pins (11), (12) and
(13) of 109 switched from
H to L level (separately)
when the toneaxm passes
the corresponding record
size position when the
repeat switch is on?
Designated size
30cm -> pin (12)
Designated size
25cm -> pin (13)
Designated size
17cm -> pin (11)
lves

Is TPB switched to H

level during the above H Ni> Defective 1013

to L level switching?

NO Defective sensor circuit
board

. lves
Defective IC7 or defective
plunger

9.1.9

Tonearm fails to stop at
designated lowering posi-

tion
l
Are pins (11), (12) and
(13) of 1C9 switched from . . .
H to L level when the N0 stiestive sensor Circuit

toneaxm passes the desig-
nated lowering positions ?
lves

ls TP3 switched to H level

during the above H to L & Defective [013

level switching ?
yves

Defective 107 or defective
plunger

39