Teac AG-790 Service Manual
Teac ag-790 am/fm stereo receiver service manual
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Also See for AG-790:
- Owner's manual (98 pages) ,
- Service manual (21 pages) ,
- Owner's manual (32 pages)
Table of Contents
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Effective : April, 2003
SERVICE MANUAL
A A G G - - 7 7 9 9 0 0
AM/FM Stereo Receiver
CONTENTS
PC boards 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 components - refer to the appropriate
parts list and ensure exact replacement.
NOTES
S-0092A
2
3
6
8
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Table of Contents
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Summary of Contents for Teac AG-790
- Page 1 SERVICE MANUAL A A G G - - 7 7 9 9 0 0 AM/FM Stereo Receiver CONTENTS 1 SPECIFICATIONS 2 ADJUSTMENTS AND CHECKS 3 EXPLODED VIEWS AND PARTS LIST 4 PC BOARDS AND PARTS LIST NOTES PC boards shown are viewed from parts side. The parts with no reference number or no parts number in the exploded views are not supplied.
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Page 2: Specifications
1 SPECIFICATIONS Amplifier Section Voltage Conversion Output Power..100 + 100 watts RMS (0.9 % THD, 1 kHz, 8 ohms) (General export models only) Total Harmonic Distortion....0.05 % (at 70 watts,1 kHz) Input Sensitivity/Impedance ....PHONO: 5 mV/22 kohms LINE: 300 mV/22 kohms Frequency Response ...... -
Page 3: Adjustments And Checks
2 ADJUSTMENTS AND CHECKS 2-1 AMPLIFIER SECTION Bias Current Adjustment 1. Turn the unit on, and set the input selector switch to "CD". 2. Set 7VR1 and 7VR2 to the center position. 3. Connect the DC voltmeter as shown below after preheating for 10 minutes, and adjust 7VR2 (Lch) so that the voltage becomes 3.3 1.3mV. - Page 4 2-2 TUNER SECTION SETTING ADJUSTMENT ITEM ADJUST POINTS INPUT OUTPUT AG-790 FM 87.5 MHz 2L3 (3.5T) DC 1.0 0.05V FM 108.0 MHz Check DC 8.0 0.5V å 1. VT Adjust 2R19 (VT) 2J2 (GND) AM 530 kHz 2T2 (RED) DC 1.1 0.05V...
- Page 5 DC Voltmeter 2R19 TUNER PCB 2TC2 AM Signal Generator AM Loop Antenna AC Voltmeter 60cm FM Signal Generator AC Voltmeter Distortion Analyzer Stereo Signal Generator...
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Page 6: Exploded Views And Parts List
3 EXPLODED VIEWS AND PARTS LIST... - Page 7 EXPLODED VIEW LIST £ £ £ £ £ £ INCLUDED ACCESSORIES...
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Page 8: Pc Boards And Parts List
4 PC BOARDS AND PARTS LIST MAIN PCB... - Page 9 FRONT PCB HEADPHONE PCB SP SEL PCB TUNER PCB SP JACK PCB POWER PCB...
- Page 10 MAIN PCB ASSY FRONT PCB ASSY £ £ £ £ £ £ £ £ TUNER PCB ASSY £ £ £ £ £ £ £ £ £ £ £ £ £ £...
- Page 11 HEADPHONE PCB ASSY £ SP SEL PCB ASSY SP JACK PCB ASSY POWER PCB ASSY £ £ £ £ £...
- Page 12 AG-790 SCHEMATIC DIAGRAM MAIN PCB (1/2) 4R17 -12V 47U/16V -12V 4C19 47U/16V 5N1-1 4N1-1 4R13 4R15 4558D 4558D PHONO/L 4C17 2U2/50V 4R11 4R9 12K 180K 4C15 47U/16V 4C11 4C13 47U/16V 4C20 4R18 100 47U/16V 5R10 47U/16V 4N1-2 4R14 4R16 4558D...
- Page 13 AG-790 SCHEMATIC DIAGRAM MAIN PCB (2/2), HEADPHONE PCB, SP SEL PCB, SP JACK PCB, POWER PCB 1XS7 1XP7 7R75 680 7C25 7R41 4U7/63V 7R76 680 7R25 7R29 3K3/0.5W 4148 7D11 7R67 4148 7D12 7V23 4148 7R57 5551 RELD 5401 7V19...
- Page 14 AG-790 SCHEMATIC DIAGRAM TUNER PCB LOOP 2C14 2R19 2VD3 2TC2 2C40 *2TC1 2R17 2D2 IN4148 V149B 3U3/50V 100K 100K 4.5T 2C44 2VD1 K161GR V104 2C12 2C25 2C11 C1815GR TA2149N 2C28 2C42 RFGND FMRF 4.5M 2R23 TC9257F RFIN RFVCC 3.5T 2R32...
- Page 15 AG-790 SCHEMATIC DIAGRAM FRONT PCB V F D 1XP4 8R30 8R31 8R21 10K 2.1V -24V 8R22 10K 2.1V DGND 1N4148 100U/35V 100U/25V SW16 8R27 KEY4 KEY3 KEY2 KEY1 STB CLK IC DIN DOUT 1N4148 BAND BALANCE SW13 SW15 LED1 470U/16V...