Page 1
SHARP
SERVICE
MANUAL
S3918RP6900AK
In the interests of user-safety the set should be restored to its original condition and only parts identical to those specified be used.
I
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/
INDEX TO CONTENTS
Page
SPECIFICATIONS.. .............................................................................................. 2
NAMES OF PARTS ............................................................................................. 2
DISASSEMBLY..
................................................................................................. 2
ADJUSTMENT ................................................................................................... 3
SCHEMATIC DIAGRAM/WIRING SIDE OF
P.W.BOARD..
.......................................... 3
EXPLODED VIEW.. .............................................................................................. 4
REPLACEMENT PARTS LIST.. ...........................................................................
5,6
SHARP CORPORATION
Page 2
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE
REFER TO THE OPERATION MANUAL.
SPECIFICATIONS
Type:
Speed:
Motor:
output:
Frequency response:
Tracking force:
Tonearm:
Cartridge:
Replacement stylus:
Dimensions:
Weight:
Belt drive, semi automatic
33-113
and 45 rpm
DC motor
90 mV (1 kHz, 50
mmisec.)
20 - 20,000
Hz
49
Dynamic balanced straight tonearm
Magnetic type (CART-1 55)
STY-l 55
Width; 430 mm
(17”)
Height; 100 mm
(3-15/l
6”)
Depth; 340 mm
(13-3/8”)
2.0
kg (4.4 Ibs.)
Specifications for this model are subject to change without prior notice.
NAMES OF PARTS
1.
17 cm
(7”)
EP Record
Adaptor
2. Turntable Platter
3. Centre Spindle
4. Tonearm
5. Tonearm Rest
6. Cartridge
7.
Cue Lever
8. Speed Selector Switch
9. Cut Button
1
2
3
Figure 2-l
DISASSEMBLY
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I
Caution on Disassembly
Follow the below-mentioned notes when disassembling the
unit and reassembling it,
to
keep its safety and excellent
performance:
1. Take record out of the unit.
2. Be sure to remove the power supply plug from the
SC-6900A before starting to disassemble the unit.
3. Take off nylon bands or wire holders where they need
be removed when disassembling the unit. After servicing the unit, be sure to rearrange the leads where they
were before disassembling.
Turntable
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I
(Al)xl
\
Figure 2-2
Belt..
.................
(Al)xl
1.
Screw ................
fB1
1x9
IBl )x4 (811x5
03x 13mm
d3x12mm
Bottom Board
Figure 2-3
-2-
Page 3
REPLACEMENT PARTS LIST
“HOW
TO ORDER REPLACEMENT PARTS”
To have your order filled promptly and correctly, please furnish the following information.
1. MODEL NUMBER
2. REF. NO.
3. PART NO.
4. DESCRIPTION
*MARK:
SPARE PARTS-DELIVERY SECTION
REF.NO.
PART NO.
*
DESCRIPTION
INTEGRATED CIRCUIT
CODE
IC601 VH i BA7 15 // / -
1
J
Equalizer
Amp.,BA715
AD
COIL
Ll
VP-CH471KOOOO J.470 pH
AB
CAPACITORS
There are two types of capacitors available and they can be
identified
from each
other by reading
therr
Part Numbers.
*
Ceramic type capacitor;
A symbol
“c”
or “K” is given at the 3rd digit of its Part Number like “VCC (or
K) J,”
*
Semiconductor type capacitor.
A symbol “T” is given at the 3rd digit of its Part Number like “VCT......J.”
The capacrtance error of each capacitor is indicated by the symbol given at the
13th digit of the Part Number as
follows:“J” (?!I%),
“K”
(?lO%),
“M”
(120%)
“N” (?130%),
“c” (kO.25 pF),
“D”
(kO.5 pF),
“z”
(+80-20%).
(Tubular type ceramic capacitor is identified by the symbol
TV(TQ/CY)
of the
part NO.
VCOOTV(TQ/CY)OOOOOOO;
this
TV(TQ/CY)
does not mean the lead
wrre.)
(Tubular type ceramic capacitor is identified by the symbol
MF(MN)
of the part
NO.
VCOOMF(MN)OOOOOOO;
this
MF(MN)
does not mean the
iead
wire.)
Unless otherwise specified, electrolytic capacrtors are
t20%
type.
Cl
c2
C601,602
C603
C604,605
C606,607
C608,609
C610,611
C612.613
C614
C615
RC-GZA336AFlC J
33
~F,16V,Electrolytic
VCKZPUlHF103Z J
0.01
pF,50V
RC-GZA105AFlH J
1
pF,50V,Electrolytic
RC-GZA476AFlC J
47
pF,16V,Electrolytic
VCCSPAlHLPZlJ J
220
pF,SOV
RG-GZA475AF 1C J
4.7
pF,16V,Electrolytic
VCQYKAlHM222J J
0.0022
/1F,5OV
VCQYKAlHM822J J
0.0082
,uF,5OV
RC-GZA335AFlH J
3.3
pF,50V,Electrolytic
RC-GZA476AFlC J
47
,uF,16V,Electrolytic
VCKZPAlHF473Z
J 0.047
flF,50V
RESISTORS
AB
AA
AB
AB
AA
AB
AB
AB
AB
AB
AA
(Unless otherwise
specfifed,
resistors are
t5%,carbon
type.)
R601,602
VRD-ST2CD471J J
470
ohms,1/6W
AA
R603-606
VRD-STZCD104J J
100
kohm,l/6W
AA
R607
VRD-ST2EE33
1
J
J
330
ohms,1/4W
AA
R608-611
VRD-STZCD102J J
1
kohm,l/6W
AA
R612,613
VRD-STZCDS
3 3
J
J
33
kohms,l/6W
AA
R614,615
VRD-ST2CD394J J
390
kohms,l/6W
AA
R616,617
VRD-STPCD124 J J
120
kohms,l/6W
AA
R618,619
VRD-ST2CDlOPJ J
1
kohm,l/6W
AA
CNS601
M601
PG601
SW601
OTHER CIRCUITRY PARTS
99LUL1007
J
Connector, DC Power
Supply Cord
99LPA40180
J
Phono Motor with Pulley
99LULAWM2863
J Plug,Phono
Output
99LLSB-1123
J
Switch,Leaf Type
[Power]
AQ
BA
AP
AK
REF.NO.
SW602
401
99LPM10072
J CabinetPlayer
402
99LPM40190
J Lifter,Tone
Arm
403
99LPZ40020
J Spring,Tone
Arm Lifter
404
99LPP30033
J Plate,Cabinet
405
99LPM40550
J Lever,Cue
406
99L3
.1X12X0 .8
J Stopper,Cue
Lever
408
99LPM40070
J Lever,Lifter
409
99LPZ40031
J Spring,Lifter
Lever
410
99LPA40020
J
Center Shaft Ass’y
411
99LPM30120
J
Arm, Controller
412
99LPZ40030
J Spring,Controller
Arm
413
99LPM30130
J Arm,Actuator
PART NO.
99LSUF12
*
DESCRIPTION
J
Switch,Push Type
[Turntable Speed]
PLAYER MECHANISM PARTS
414
1414-l
BG
AC
AC
AQ
AC
AC
AC
AC
AS
AE
AC
AE
AK
99LPA30020
J
Gear Ass’y
99LPM20040
J
Gear
AB
CODE
AL
I
414-2
414-3
414-4
415
416
417
418
420
99LPM40010
J Plate,Clutch
Guide
AC
99LPP40010
J PlateClutch
AD
99LPM40080
J StopperClutch
AA
99LPM40050
J Lever,Switch
AC
99LPZ40110
J Link,Reject
Lever
AP
99LPM40170
J Lever,Reject
AD
99LPZ40033
J Spring,Reject
Lever
AC
99LPM30100
J ButtonTurntable
Speed/
AC
422
423
425
cut
99LPM40160
J Holder,Reject
Lever Link
99LPP40020
J Cushion,Motor
99LPM40090
J
Lock
Lever,Tone
Arm
r
426
99LPA20090
J
Tone Arm Ass’y
426-l
Tone Arm (Not Replacement
426-2
426-3
426-4
427
428
429
430
432
435
436
437
440
442
443
444
447
450
452
453
454
455
456
701
702
703
704
Item)
RCTRE5
104AFZZ J
Cartridge
(CART-155)
PNDLDO
1
OZAFZZ J Stylus(STY-155)
99LM2X8LBK
J Screw,d2X8mm,Black
99LPM30090
J Arm,Control
99LPZ40032
J Spring,Control
Arm
99LPM40240
J Holder,Power
Supply Cord
99LPP30020
J Board,Bottom
99LPP40570
J
Rubber,Foot
99LPM20070
J
Turntable
99LPP40230
J Belt,Turntable
99LPP20010
J MatTurntable
99LPM40030
J
EP Adaptor
QHWS-OOOICEFN J
Earth Lug
99LPK40497
J LabelSpecifications
99LPK40513
J Label,DC
Input
99LPK40551
J LabeLMotor
Speed Adj
99LPM30400
J Leg,Decoration
LHLDWl124AFZZ J
Nylon
Band,80mm
99LPM40280
J Lever,Cue
Knob
99LPM40560
J Lever,Cue
99LPP40520
J
Rod,Cue
99LPZ40380
J Spring,Cue
99LC.S.3
J
Stop Washer
99L+2S-2 .6X8L J
Screw,r#2.6X8mm
99L+2S-2XL6
J Screw,d2X6mm
99LS2S-3X20L
J Screw,d3X20mm
AB
AB
AB
BC
-
-
BA
AZ
AA
AD
AC
AB
AN
AD
BC
AL
AS
AD
AA
AB
AA
AA
AG
AA
AC
AD
AD
AD
AA
AA
AA
AA
-5-
Page 4
704
435
423x3
42
SW602
I ! A
414-I \
/ 0
’ Lc
%-
,o
\
\
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-- /-
--_I
/- -1
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;426
I
I
420
i
444
714x2
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I
a
I
cl
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Figure 4 EXPLODED VIEW
Page 5
ADJUSTMENT
As for adjusting method refer to the relevant explanation
in Service Manual “ADJUSTMENT PROCEDURES OF AU-
DIO PRODUCTS”.
. Auto Return
Jig
Test record
SSR-4005
Adjusting Point
I
Remarks
Auto return
Direction 8: Late
adjusting screw
Direction @: Early
. Rotational Speed of Phono Motor
Jig
Test record
SSR-4005
Adjusting Point
Specified value
See Fig. 3-2
2,970 k 10 Hz
Adj:usting
Screw
Figure 3-l
SPEED
ADJ
1
FRONT SIDE
BOTTOM BOARD
Figure 3-2
SW602
SPEED
Figure 3-3 WIRING SIDE OF
P.W.BOARD
PLAYER
UNIT
IC601
BA7l5 EQ.
AMP
I
- ;~
y: ,^
I
Phono Signal
Y9
I*
_--
L-Ch
PG601
PHONO
0”TPU-r
PLUG
-R-
Ch
I3618
IK
I
@
3
CNSBOI
-e.9.0”
2
I
Figure 3-4 SCHEMATIC DIAGRAM
-3-
Page 6
REF.NO.
PART NO.
*
DESCRIPTION
706
99l-tzS-3X4L
J
Screw,Q3X4mm
707
99LPZ40010
J Screw,d2,4X9mm
709
99LM3X12L
J Screw,d3X12mm
710
99L+2s-3xlzL
J
Screw,
63X 12mm
713
99LPL40140
J Screw,Foot
714
.99L+2S-3XL8
J Screw,b3X8mm
715
99LTGW3
J
Toothed Washer
ACCESSORIES/PACKING PARTS
99LPz10110
99LPZ10120
99LPK40530
99LPK40540
99LPK40480
99LPK40534
J
Packing Add., Front
AE
J
Packing Add., Rear
AE
J
Polyethylene Bag, unit
AR
J Pad,Top
AF
J
Polyethylene
Bag,Turntable
AC
J
Packing Case
AK
P.W.B. ASSEMBLY
(Not Replacement Item)
PWB-A
99LPA4007 1
J
Equalizer PWB
CODE
AA
AA
AA
AA
AA
AA
AA
Writer and Editor: Quality & Reliability Control Center of Audio Systems Group, Sharp Corp.
A8903-805NK.IS.K
Printed in Japan
54
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