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PC board shown are viewed from parts side.
The parts with no reference number or no parts number
in the exploded views are not supplied.
As regards the resistors and capacitors, refer to the
circuit diagrams contained in this manual.
Parts marked with this sign are safety critical
components. they must be replaced with identical
ensure exact replacement.
!
components - refer to the appropriate parts list and
1 SPECIFICATIONS
2
4 EXPLODED VIEW AND PARTS LIST
5 PC BOARDS AND PARTS LISTS
6 WIRING DIAGRAM
7 INCLUDED ACCESSORIES
2 SAFETY INFORMATION
3
PLL TUNING SUITCASE TYPE TURNTABLE
6
11
15
16
3 ADJUSTMENT AND CHECKS
4


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1 SAFETY INFORMATION
2
ST-C150
USE OF CONTROLS OR ADJUSTMENT OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY
HAZARDOUS RADIATION EXPOSURE.
RESULT IN
SAFETY INFORMATION
This product has been designed and manufactured according to FDA regulations " title 21, CFR, chapter 1,subchapter J,based on
The Radiation Control for Health and Safety Act of 1968" and is classified as class 1 laser product. There is not hazardous
invisible laser radiation during operation because invisible laser radiation emitted inside of this product is completely confined
in the protective housings. The label required in this regulation is shown
.
1
CAUTION
DO NOT REMOVE THE PROTECTIVE HOUSING USING SCREWDRIVER.
IF THIS PRODUCT DEVELOPS TROUBLE, MAKE A CONTACT WITH OUR SERICEMAN, AND DO NOT USE THE PRODUCT A TROUBLED
STATE.
1
FOR U.S.A.
XXXX
AUDIO PRODUCT
LISTED
R
MODEL NO. ST-C150


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2 SPECIFICATIONS
Amplifier Section
60 Hz to 20 kHz
Power Requirements:
Tuner Section
FM Frequency :
87.5 MHz to 108.0 MHz
AM Frequency :
530 kHz to 1710 kHz
Record Player Section
Motor :
DC servo motor
Drive System :
Belt Drive
GENERAL
Design and specifications are subject to change without notice.
Illustrations may differ slightly from production models.
Dimension (W x H x D ):
Weight: (net)
Standard Accessories:
Warranty Card x 1
Main Unit
Main Unit
7.95 kg
Power Consumption:
Owner s Manual x 1
,
Speaker
Adaptor 45 rpm x 1
Frequency Response :
Speaker
2.85 kg x 2
ST-C150
3
Wow & Flutter :
Speed :
33-1/3 rpm, 45 rpm, 78 rpm
Less than 0.35% (WTD)
Catridge Type :
Ceramic Stereo Catridge
Stylus
STL-153
Type :
Impedance :
1-ways
4 ohms
SPEAKER SYSTEM Section
120v , 60Hz
15 W
379 x 463 x 249 mm
136 x 452 x 230 mm


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ST-C150
4
3 ADJUSTMENTS AND CHECKS
Use a screwdriver with a plastic or ceramic grip for all adjustment.
3-1 TUNER SECTION
1. Set the function switch to the AM position.
2. Connect the test loop antenna across the output of the signal generator.
3. Connect the oscilloscope to the speaker terminal.
4. Set the signal generator as listed in the alignment chart.
3-1-2 AM adjustment
1. Set the function switch to the FM position.
2. Connect the signal generator output through a 75 ohm dummy
3. Connect the oscilloscope to the speaker terminal.
4. Set the signal generator as listed in the alignment chart.
3-1-1 FM adjustment
antenna to "ANT" on MAIN PCB.
3-2 Adjustment and Test Points
T2
L6
L3
L2
L7
MAIN PCB


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5
ITEM
ADJUSTMENT POINT
ADJUSTMENT
SG SETTING
TUNER SETTING
3. Tracking
3. Tracking
108MHz
106MHz
106MHz
Repeat step 3
90MHz
90MHz
108MHz
87.5MHz
87.5MHz
1kHz, +/-22.5kHz dev.
1kHz, +/-22.5kHz dev.
1kHz, +/-22.5kHz dev.
1kHz, +/-22.5kHz dev.
L3
L2
PVC CT003
PVC CT002
Adjust for max.output.
Adjust for max. output
and best waveform.
1. IF adjustment
2. AM band
455 kHz
1710kHz
1710kHz
1710kHz
Repeat step 3
600kHz
600kHz
1400kHz
1400kHz
530kHz
530kHz
1kHz, 30% mod
1kHz, 30% mod
1kHz, 30% mod
1kHz, 30% mod
1kHz, 30% mod
L6
AM ANT COIL
PVC CT004
PVC CT001
T2
AM
Adjust for max.output.
Adjust for max. output.
Adjust for max. output
and best waveform.
3-2-1 FM/AM alignment chart
2. FM band
ST-C150
FM
1.IF adjustment
10.7MHz
108MHz
L7