Sharp SC-103H User manual

== Service
MODELS
SC-103H
CP-108H
CONTENTS
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SHARP
CORPORATION
oSAKA,
JAPAN

ELECTRICAL SPECIFICATIONS
Circuit: .
Semiconductors:
Power Source:
Power Consumption:
Speakers:
Dimensions: (S§C103H)
(CP-108H)
Weight:
FM SECTION
Frequency Coverage:
Maximum Sensitivity:
IF Rejection:
Image Rejection:
Frequency Response:
Harmonic Distortion:
Signal to Noise Ratio:
FM STEREO SECTION
Stereo Separation:
Stereo Indicator Lighting Level:
Harmonic Distortion:
Signal to Noise Ratio:
AM SECTION
Frequency Coverage:
Maximum Sensitivity:
IF Rejection:
Image Rejection:
AGC Figure of Merit:
Band Width:
Harmonic Distortion:
FM/AM 2:-band superheterodyne
system stereo tuner-amplifier with
FM multiplex circuit with AFC and
4 track cassette tape recorder and
2 way speaker system
31-transister. J-FET. 1-IC.
110/220/240V, 50Hz
60 watts
Woofer 6-1/2" x 2
Tweeter 1-5/8" x 2
20-3/4"(W)x10-1/2"(D)x5-1/4"(H)
9-3/4"(W)x5-1/2"(D)x13-11/16"(H)
(SC103H) = 15.2Ibs
(CP-108H) 4.2Ibs x 2
15-diode
88 — 106MHz
1.6uV
70 dB
48 dB
70 — 10kHz
1%
45 dB
35 dB
10uV
1%
45 dB
520 ~- 1,620kHz
130nV/m
30 dB
40 dB
$0 dB
5.5kHz
2%
AUDIO SECTION
Total Peak Music-Power
Output:
Distortion at 500mW:
Frequency Response:
Hum and Noise Level:
Sensitivity for Rated Output:
Channel Separation:
Tone Characteristics:
20W
0.5%
40Hz ~ 22kHz
Residual Volume 3mV
Maximum Volume Phono MM 60mV
Tape 60mV
Phono M.M. ImV
50 dB
Bass Boost at 100Hz +8 dB
Cut at 100Hz -11dB
Treble Boost at 10kHz +8dB
Cut at 10kHz ~15 dB
TAPE RECORDER SECTION
Type:
Tape:
Tape Speed:
Record/Playback Time:
Recording System:
Erasing System:
Wow & Flutter:
Fast Forward & Rewind Time:
Frequency Response:
Distortion:
Signal to Noise Ratio:
Channel Separation:
Erase Ratio:
Input Circuitry:
Sensitivity & Input Impedance:
MIC
Line
4-track 2-channel stereo cassette
tape recorder
Philips type compact cassette tape
1-7/8 ips
60 minutes (C-60)
AC bias 53.5kHz
AC erasing
0.45% weighted peak
70 seconds (C-60)
40Hz to 12,000Hz
1.6%
46 dB
35 dB
65 dB
MIC x 2(microphone impedance 5002)
DIN-TYPE
0.1mV, @47KQ impedance
50mV, @220KQ impedance
Figure 1
DISASSEMBLY
2

DISASSEMBLY
CHASSIS REMOVAL (Refer to Figure 1)
1. Disconnect all leads connected to the back of the set.
2. Remove 7 screws (1) retaining the chassis (2).
3. Gently pull forward the panel (3) and chassis from the
cabinet (4).
FRONT PANEL REMOVAL
_ 1. Remove the cabinet as described in Chassis Removal.
2. Remove 8 knobs (5,6,7,8) from front of the panel.
3, Remove 9 screws (9) retaining the front panel.
4. Gently pull out the panel while holding both sides.
Figure 2 DIAL CORD STRINGING
OPERATING MODES
1. STOP Mode
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1.
MECHANISM ADJUSTMENT
AUTOMATIC SHUT-OFF MOTION ADJUSTMENT (Refer to Fig. 17 and Fig. 18)
Sic
ADJUSTING
SCREW--(A)
or
veal)
[Sy
18+02m
(5/64" +1/64")
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Figure 17
Adjust
the
position
of
the
electromagnet
by
using
a
thickness
gauge
so
that
a
distance
becomes
approximately
1.8+0.2mm(5/64"41/64")in
STOP
mode,
as
shown in
Fig.
17.
Adjust
the
nut
so
that
clearance
between
STOP
lever
(081)
and
(082)
becomes
0.1
to
0.3mm
(1/128"~1/64").
FLYWHEEL THRUST CLEARANCE ADJUSTMENT (Refer to Fig. 19)
THRUST ADJUSTING SCREW
0.1~O.3mm
(I/128°~1/64")
Figure 19

3. MOTOR SWITCH POSITION ADJUSTMENT (Refer to Fig. 20)
it
SW3
~ADJUSTMENT POINT
Figure 20
4. PRESSURE ROLLER ADJUSTMENT (Refer to Fig. 21)
READING
STOPPER CAPSTAN SHAFT 275t 259r
PRESSURE
(9.7+0.880z)
GAUGE
Figure 21
1) Adjust the pressing force of the pressure roller (101) to the capstan shaft in PLAY mode.
2) Read the value of pressing force when the pressure roller (101) moves off the capstan shaft.
3) At the time, in PLAY mode check that clearance between the pressure roller (101) and the stopper is around
0.5mm (1/32”).
5. TURNTABLE DRIVING PULLEY PRESSURE ADJUSTMENT (Refer to Fig. 22)
ADJUSTMENT HOLE
PLAY Mode , 096
(1.7 740.35 0z)
TENSION GAUGE (O~I100g)
(0 ~350z)
Figure 22
1) Measure the pressing force, hooking a tension gauge on the slip roller lever (083).
2) Read the pressing force when the take-up turntable (108) stops.
8

6.
FAST
FWD
ROLLER
PRESSURE
ADJUSTMENT
(Refer
to
Fig.
23)
READING
[ste |
(6.35 +1060z)
TENSION GAUGE toes
O-~100z
068
Figure 23
1)
Hook
a
tension
gauge
on
A
part
of
FAST
FWD
roller
(085)
in
FAST
FWD
mode
and
read
the
tension
gauge
when
the
take-up
turntable
(108)
stops.
Adjustment
is
made
by
bending
the
spring
(161).
7.
REWIND
ROLLER
PRESSURE
ADJUSTMENT
(Refer
to
Fig.
24)
TENSION GAUGE (0~100g)
(0 ~350z)
Figure 24
1)
Set
a
tension
gauge
at
A
part
of
the
REWIND
roller
lever
(086)
in
REWIND
mode
and
read
the
tension
gauge
when
the
supply
turntable
(101)
stops..
Adjust
the
tension
by
the
spring
(159).
8. BRAKE LEVER ADJUSTMENT (Refer to Fig. 25)
088 ADJUSTMENT SCREW
108 107
Figure 25
1)
Check
that
the
brake
lever
(088)
is
pressed
against
the
turntables
(107
&
108)
in
STOP
mode
and
that
the
brale
lever
(088)
is
apart
at
the
same
distance
from
the
turntables
(107
&
108)
in
PLAY,
FAST
FWD
and
REWIND
moks.
Adjust it by the retaining screw.

9. SUB-CHASSIS STROKE ADJUSTMENT (Refer to Fig. 26)
155
ADJUSTMENT SCREW
CASSETTE
HOLD
PIN
Figure 26
1) Adjust the sub-chassis adjusting bracket (155) so that the long hole of the sub-chassis (058) is pressed against the
cassette hold pin in PLAY mode and also in STOP mode.
10. PAUSE MECHANISM ADJUSTMENT (Refer to Fig. 27 and Fig. 28)
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10)
.omm( 1/32")
Figure 27 Figure 28
1) Depress the PAUSE button in PLAY mode and check that clearance between the pressure roller (101) and the
capstan shaft is over 0.5mm (1/32”). Adjust it by bending A part of the pause operating lever (072).
2) After adjustment, depress only the PAUSE button and, in PLAY mode, check that clearance between the pressure
roller lever (101) and B part of the pause operating lever (072) is over 1mm (3/64").
3) Adjust it by bending C part so that the take-up turntable (128) and the pressure roller (101) simultaneously
stop when PAUSE button is depressed in PLAY mode.
4) Disengage PAUSE button and check that clearance at C part is over Imm (3/64”) in PLAY mode.