Teac SR-L50 User manual

SERVICE MANUAL
SR-L50
CD Receiver
NOTES CONTENTS
●PC boards shown are viewed from parts side. 1 SAFETY INFORAMTION…………………… 2
●Parts marked with * require longer delivery time. 2 SPECIFICATIONS…………………………… 3
3 ADJUSTMENT AND CHECKS………….…. 4●The parts with no reference number or no parts number in the
exploded views are not supplied. 3-1 TUNER SECTION……....………………… 4
3-2 CD SECTION…………………………….… 7●As regards the resistors and capacitors, refer to the circuit
diagrams contained in this manual. 4 EXPLODED VIEWS AND PARTS LIST…… 8
Parts marked with this sign are safety critical 5 PC BOARDS AND PARTS LIST…………… 16
components. They must be replaced with identical 6 WIRING DIAGRAM……………………….…. 26
components – refer to the appropriate parts list and
●
ensure exact replacement.
●Parts of [] mark can be used only with the version designated.
●[T/C]:USA/CANADA,[EUR]:EUROPE,[UK]:UK,
[HKG]:HONG KONG

SR-L50
1 SAFETY INFORMATION
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 1986” and is classified as class 1 laser
product. There is no 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
below.
●CAUTION
USE OF CONTROLS OR ADJUSTMENT OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE
SPECIFIED HERE IN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.
Optical pickup:
Type : SLD104AU
Manufacturer : SONY Corporation
Laser output : Less than 0.5mV on the objective lens
Wavelength 760 – 800 nm
2

SR-L50
2 SPECIFICATIONS
TUNER Section (FM) GENERAL
Frequency Range……………… 87.50 to 108.00 MHz(100kHz step) Total Output Power………………………………………………15W
(U.S.A./Canada Model, General Export Model) Power Requirements……..…120V, 60Hz (U.S.A./Canada model)
Frequency Range……………..… 87.50 to 108.00 MHz(50kHz step) 230V, 50Hz (Europe Model)
(Europe Model) 120V/230V AC, 50-60Hz (General export model)
Power Consumption………...………………..……..……..……40W
TUNER Section (AM) Dimension ( W x H x D ) ……………….…….389 x 213 x 216 mm
Frequency Range……………...………520 to 1710 kHz(10kHz step) (15-7/8”x8-3/8”x8-1/2”)
(U.S.A./Canada Model, General Export Model) Weight..…………………………………………...6.0 kg (13-3/16 lb)
Frequency Range…………….....………522 to 1620 kHz(9kHz step)
(Europe Model) Standard Accessories
Remote Control Unit (RC-917) x 1
CD PLAYER Section FM lead-type antenna
Frequency Response……………………..…...…20 to 20kHz (±1dB) (U.S.A./Canada Model, General Export Model)
Wow and Flutter……………………….………...……...Unmeasurable Remote Control Unit (RC-917) x 1
(Europe Model)
SPEAKER SYSTEM Section
Type.…………………………….………………..……65 mm 1-way x2
80 mm subwoofer x1 ●Design and specifications are subject to change without notice.
Impedance…………….………………………….……..8 ohms (L & R) ●Illustrations may differ slightly from production models
8 ohm (subwoofer)
3

SR-L50
3 ADJUSTMENTS AND CHECKS
3-1 TUNER SECTION
Use a screwdriver with a plastic or ceramic grip for all adjustment.
AM adjustment
1. Set the function switch to the TUNER position.
2. Set the BAND switch to the AM position.
3. Connect the test loop antenna across the output of the signal generator.
4. Connect the oscilloscope to the PHONES JACK terminal.
5. Set the signal generator as listed in the alignment chart.
FM adjustment
1. Set the function switch to the TUNER position.
2. Set the BAND switch to the FM position.
3. Connect the signal generator output through a 75 ohm dummy antenna to "ANT"
on TUNER PCB CN8.
4. Connect the oscilloscope to the PHONES JACK terminal.
5. Set the signal generator as listed in the alignment chart.
3-1-1. RADIO ALIGNMENT
FIG. 1-1 Adjustment locations
4
TUNER PACK
TC1
CW11
CN10
CW8
L5
L4
IC2
L3
IC1 TA2057N
SR-L50 TUNER PCB

SR-L50
3-1-2 AM TUNER
SG SETTING
ITEM Audio Modulation Frequency Output
TUNER
SETTING ADJUSTMENTS
MEASURING
POINTS
RESULT
1710KHz(T/C)
1620KHz(EUR)
L4 VT
8.0V
530KHz(T/C)
1.VOLTAGE
adjustment
531KHz(EUR)
Check VT
1.5V
610KHz(T/C) 610KHz(T/C)
2.IFT
adjustment 1KHz 30%
612KHz(EUR)
76dBuV
612KHz(EUR)
L5 Maximum
output level
610KHz(T/C) 610KHz(T/C)
3.ANT Coil
adjustment 1KHz 30%
612KHz(EUR)
76dBuV
612KHz(EUR)
Am ant coil
L3
Maximum
output level
1410KHz(T/C) 1410KHz(T/C)
4.TC1
adjustment 1KHz 30%
1413KHz(EUR)
76dBuV
1413KHz(EUR)
TC1
Repeat step 3
and 4
Maximum
output level
AM Signal generator AM
AC voltmeter
AM LOOP
Antenna
60CM
FIG. 1-1-1
5
SR-L50
PHONES
1KΩ
1K
Ω

SR-L50
3-1-3 FM TUNER
SG SETTING
ITEM AUDIO Modulation Frequency Output
TUNER
SETTING ADJUSTMENTS
MEASURING
POINTS.
RESULT
106.1MHz Check VT
5.5-5.9V
VOLTAGE
adjustment
90.1MHz Check VT
1.2-1.6V
FM Signal generator FM
75 ohm
AC voltmenter
FIG.1-1-2
6
SR-L50
PHONES
1KΩ
1KΩ

SR-L50
3-2 CD SECTION
Auto alignment.
7

SR-L50
EXPLODED VIEW-1
REF. NO PARTS NO. DESCRIPTION REMARKS
1
–
1 024-43010033 SCREW Ø3x10MM PWA BLACK HD
1 – 2 061-OLT10800 SPEAKER 2” 8 ohm 5~8W
1 – 3 035-SD900082 R/L SPEAKER EVA WASHER
1 – 4 023-23014033 SCREW Ø3x14MM BB BLACK HD
1 – 5 010-SR500200 LEFT SPEAKER BOX COVER
1 – 6 010-SR500300 RIGHT SPEAKER BOX COVER
1 – 7 099-39SRL502 ABSORB COTTON B (SIZE:108x80Xt20MM)
1 – 8 035-SLD90052 EVA SHEET(D):93x5Xt1.0MM
1 – 9 035-SRL50022 EVA SHEET(C):11.8x5xT1.0MM
1 – 10 010-SR500100 WOOFER BOX
1 – 11 011-SD900200 HEAT SINK BKT
1 – 12 023-23008032 SCREW Ø3x8MM BB ZMC HD
1 – 13 023-23012033 SCREW Ø3x12MM BB BLK HD
1 – 14 018-SRL50000 POWER IC HEAT SINK
1 – 15 022-23008033 SCREW Ø3x8MM BM BLK HD
1 – 16 023-13006032 SCREW Ø3x6MM PB ZMC HD
1 – 17 011-SR500500 TUNER PCB SHIELD PLATE
1 – 18 100-SR502060 TUNER PCB ASS’Y ( FOR T/C )
100-SR501180 TUNER PCB ASS’Y ( FOR EUR )
1 – 19 100-SR502010 MAIN PCB ASS’Y ( FOR T/C )
100-SR501160 MAIN PCB ASS’Y ( FOR EUR )
1 – 20 023-23010032 SCREW Ø3x10MM BB ZMC HD
1 – 21 099-39SRL501 ABSORB COTTON A (SIZE:126x126xT20)
1 – 22 035-SRL50002 EVA SHEET(A):183x5xT1.0MM
1 – 23 035-SRL50012 EVA SHEET(A):138x5xT1.0MM
1 – 24 011-SR900401 TRANSFORMER BKT
1 – 25 021-44015032 SCREW Ø4x15MM PWT ZMC HD ( FOR T/C )
021-44020032 SCREW Ø4x20MM PWT ZMC HD ( FOR EUR )
1 – 26 021-44018032 SCREW Ø4x18MM PWT ZMC HD ( FOR T/C )
021-44024032 SCREW Ø4x24MM PWT ZMC HD ( FOR EUR )
1 – 27 084-SD900200 TRANSFORMER UL 120V/60Hz ( FOR T/C )
094-SD900100 TRANSFORMER VDE 230V/50Hz ( FOR EUR )
1 – 28 087-00000007 AC CORD “UL” L=2000MM BLACK ( FOR T/C )
087-00000001 AC CORD “VDE” L=2000MM BLACK ( FOR EUR )
087-00000004 AC CORD “BSI” L=2000MM BLACK ( FOR UK/HKG )
1 – 29 010-SD900600 CORD STOP
1 – 30 044-SLD90040 SPEAKER PAPER TUBE(BOTTOM)
1 – 31 023-44010032 SCREW Ø4x10MM PWB ZMC HD
1 – 32 061-OLT10801 SPEAKER 3” 8 OHM 10~15W
1 – 33 035-OOLT1052 EVA SHEET:Ø83xØ73xT1.5MM
1 – 34 001-SR500100 BOTTOM CABINET ( FOR T/C, EUR )
1 – 35 100-SR502100 AUX PCB ASS’Y ( FOR T/C )
100-SR501190 AUX PCB ASS’Y ( FOR EUR )
1 – 36 037-SR500100 RUBBER FOOT B
1 – 37 037-SD900500 TRANSFORMER RUBBER SHEET (B) ( FOR EUR/HKG )
1 – 38 037-SD900600 TRANSFORMER RUBBER (ROUND) ( FOR EUR/HKG )
1 – 39 015-SR500300 ADIABATIC SHEET <B> ( FOR EUR/HKG )
1 – 40 037-SD900400 TRANSFORMER RUBBER SHEET (A) ( FOR EUR/HKG ) 9