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Teac AG-790 Service Manual
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Teac AG-790 Service Manual

Am/fm stereo receiver
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Model name of the AG-790 has been changed to AG-790E from S/N 0AL0001 and higher to
cope with Eco Power requirement. Use this service manual according to the S/N of the unit.
Effective : June 2010
AG-790E
CONTENTS
1. SPECIFICATIONS ......................................................... 2
2. BRIEF OVERVIEW OF LSI ............................................. 3
3. EXPLODED VIEWS AND PARTS LISTS ........................... 6
4. PC BOARDS AND PARTS LISTS .................................... 8
5. INCLUDED ACCESSORIES .............................................14
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 supplied pripor to this manual.
Parts marked with this sign are safety critical components.
They must be replaced with designated components.
Destination of product is expressed by [ ] mark and ensure
[ EUR ] : EUROPE, [ UK ] : U.K., [ USA ] : U.S.A.
exact replacement:
AM/FM STEREO RECEIVER
NOTES
G-1008A

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Summary of Contents for Teac AG-790

  • Page 1 AG-790E AM/FM STEREO RECEIVER Model name of the AG-790 has been changed to AG-790E from S/N 0AL0001 and higher to cope with Eco Power requirement. Use this service manual according to the S/N of the unit. CONTENTS 1. SPECIFICATIONS ………………………………………………… 2 2.
  • Page 2 AG-790E 1. SPECIFICATIONS Amplifier Section General Output Power ……………………… 90 + 90 watts RMS Power Requirements (0.9 % THD, 1 kHz, 8 ohms) 230 V AC, 50 Hz [EUR], [UK] Total Harmonic Distortion 0.05 % (at 80 watts,1 kHz) 120 V AC, 60 Hz [USA] Input Sensitivity/Impedance PHONO: 6.5 mV/22 kohms Power Consumption ………………...
  • Page 3 AG-790E 2. BRIEF OVERVIEW OF LSI CMOS 8-Bit MCU with 61440 bytes Flash memory (PQFP64) TOSHIMA T5CB5, FRONT PCBA IC91 Pin Configuration (Top View) (INT3/TC2) P15 P74 (AIN12) (PD05/PWM5/TC5) P16 P73 (AIN11) (PDO6/PWM6/PPG6/TC6) P17 P72 (AIN10) (SCL) P50 P71 (AIN9) (SDA) P51 P70 (AIN8) P67 (AIN7/STOP3)
  • Page 4 AG-790E XTEN Osc enable XTIN Input Resonator connecting pins (Low frequency) = 6 MΩ (typ.) = 220 kΩ (typ.) XTOUT Output XTIN XTOUT Hysterisis input Pull-up resistor RESET Input = 220 kΩ (typ.) R = 100 Ω (typ.) Address-trap-reset Watchdog-timer-reset System-clock-reset TEST Input...
  • Page 5 AG-790E Initial “High-Z” Sink open drain output High current output Data output Histerisis input Output latch input R = 100 Ω (typ.) Pin input Initial “High-Z” P-ch control Data output Sink open drain output or C-MOS output Output latch input Histerisis input R = 100 Ω...
  • Page 6 AG-790E 3. EXPLODED VIEWS AND PARTS LISTS EUR, UK EUR, UK – 6 –...
  • Page 7 CMC1A140 RING, SHAFT CGX1A369Z SHEET, LED CGX1A370Z SHEET, LED CGB1A165H8 BADGE, TEAC CGW1A405R4WH10 PANEL, FRONT AG-790 [EUR], [UK] CGW1A405R4XH10 PANEL, FRONT AG-790 [USA] CMD2A563 BRACKET H/P PCB ASSY ……………………………………… United on FRONT PCBA, see page 11 CMK2A010 BRACKET, PCB CBT1A991...
  • Page 8 AG-790E 4. PC BOARDS AND PARTS LISTS MAIN PCB CUP12264-3A AMP PCB L SHIELD PCB W/BN12 CUP12264-1 MAIN PCB CUP12264-3B AMP PCB R – 8 –...
  • Page 9 AG-790E MAIN PCB-A ASSY REF. NO. PARTS NO. DESCRIPTION REMARKS COP12264B MAIN PCB ASSY AG-790MK2 [EUR], [UK] COP12264D MAIN PCB ASSY AG-790MK2 [USA] ┗CUP12264Z PCB, MAIN AG-790MK2 (330x247 FR1/1) CUP12264-1 MAIN PCB BK41,42 CMD1A387 BRACKET, PCB BN42 CWB1C00710047 WIRE ASSY, 7 P 100 MM BLACK (RED) C264 CCEA1EH331T CAP, ELECT 330 UF/25V...
  • Page 10 AG-790E MAIN PCB-A ASSY REF. NO. PARTS NO. DESCRIPTION REMARKS CUP12264-3A AMP PCB L BN31A CJP14GB142ZB PIN HEADER (14PIN, 2.54 MM, ANGLE) C305A,306A CCEA2AH101E CAP, ELECT 100 UF/100 V D301A~304A CVD1SS133MT DIODE, 1SS133 Q301A~303A,312A HVTKTC3200GRT T.R, KTC3200GR Q304A,305A HVTKTA1024YT T.R, KTA1024Y Q306A HVTKTC3206YAT T.R, KTC3206YA...
  • Page 11 AG-790E 4. PC BOARDS AND PARTS LISTS FRONT PCB CUP12263-1 FRONT PCB FFC SUPPORT PCB CUP12263-2 POWER SW PCB CUP12263-5 SUB TRANS PCB CUP12263-6 CUP12263-7 CUP12263-4 CUP12263-3 POWER SECONDARY PCB POWER PRIMARY PCB H/P PCB VOLUME ENCODER PCB – 11 –...
  • Page 12 AG-790E FRONT PCB ASSY REF. NO. PARTS NO. DESCRIPTION REMARKS COP12263B FRONT PCB ASSY AG-790MK2 [EUR], [UK] COP12263D FRONT PCB ASSY AG-790MK2 [USA] ┗CUP12263Z PCB, FRONT AG-790MK2 (330x247 FR1/1) CUP12263-1 FRONT VFD & MCU PCB BK91,92 CMD1A374 BRACKET, FLT BN91 CWB1B00725058 WIRE ASSY, LOCKING TYPE BN95...
  • Page 13 AG-790E FRONT PCB ASSY REF. NO. PARTS NO. DESCRIPTION REMARKS R103 CRG1ANJ100H RES, METAL OXIDE FILM RY11 CSL1E002ZE RELAY, POWER G5PA-1 (DC 6V) T101 CLT5J040ZE SUB TRANS, VISO FIVE [EUR], [UK] CLT5J040ZU SUB TRANS AG-790MK2 [USA] CUP12263-6 POWER SECONDARY PCB BN43 CWB4D053200UZ WIRE ASSY, 5P 200 MM 3W BLACK (RED)
  • Page 14 AG-790E 5. INCLUDED ACCESSORIES REF. NO. PARTS NO. DESCRIPTION REMARKS CQX1A1519Z OWNER'S MANUAL (EFS) [UK], [USA] CQX1A1512Z OWNER'S MANUAL (EFSGIN) [EUR] CSA1A007 ANT, FM WIRE (PIGTAIL) [EUR], [UK] CSA1A019Z FM 1 POL ANT (UL) [USA] CSA1A020Z ANT, AM LOOP CABR6PPB BATTERY, AA 2 PCS IN PACK CARTAG790B REMOTE CONTROL UNIT...
  • Page 15 Rio Churubusco 364, Colonia Del Carmen, Delegación Coyoacán, CP 04100, México DF, México Phone: ( 5255 ) 5010-6000 TEAC MEXICO, S.A. De C.V Unit 19 & 20, The Courtyards, Hatters Lane, Watford, Hertfordshire, WD18 8TE, U.K. Phone: ( 0845 ) 130-2511...

  • Page 16: Table Of Contents

    SCHEMATIC DIAGRAMS CONTENTS WIRING DIAGRAM‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 2 BLOCK DIAGRAM ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 3 MAIN Section ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 4 FRONT Section ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 5 AMP, POWER Section ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 6 AG-790E AM/FM Stereo Receiver 1 st Issue; June 2010...

  • Page 17: Wiring Diagram

    AG-790E WIRING DIAGRAM Power Cord AC OUTLET CUP12263-5 BN41 SUB TRANSFORMER TUNER CUP12263- CN42 TUNER MODULE USA, EUR ONLY CN43 CUP12263-7 FFC CABLE (17 PIN) for EUR MODULE FFC CABLE (15 PIN) for Asia, USA CN41 CN96 BN94 CN43 MAIN PCB CN11 CUP12264-1 C403...

  • Page 18: Block Diagram

    AG-790E BLOCK DIAGRAM V.F.D DRIVE IC +5.6V LC75725 TUNER MODULE ANTENNA REMOTE (AM+FM) (AM+FM) SENSOR +5.6V RDS DATA RDS CLK DATA IN TRANSFORMER REGULATOR VFD CE PLL CE DATA OUT VFD DATA POWER TUNED VFD CLK SWITCH TUNER MUTE STEREO IN VFD BLK VOLUME TONE...

  • Page 19: Main Section

    AG-790E MAIN Section SCHEMATIC DIAGRAM AMP BOARD FROM AMP BOARD R CHANNEL L CHANNEL FROM FRONT BOARD 1.25 mm pitch CN31-1 CJP14GA221ZB CN31-2 CJP14GA221ZB GND1 CN92 S401 Q505 RESET KTA1268GR R508 R504 CN11 OPTION R506 USA VER. / ASIA VER. 15PIN USE EUR VER.

  • Page 20: Front Section

    AG-790E FRONT Section SCHEMATIC DIAGRAM 2.5mm pitch wafer FRONT B'D <--> SUB TRANS B'D S/W B'D <--> PWR PRI B'D CWB05 BN96 CN94 CUP12263-1 CUP12263-2 VFD & MICOM PART POWER S/W PART +5.6VA 470P ST+5.6V C955 R980 4.7K FL(AC) R981 4.7K ST+5V FL(AC)

  • Page 21: Amp, Power Section

    AG-790E AMP, POWER Section SCHEMATIC DIAGRAM POWER CORD L-CH AMP PART CUP12264-3A TO SUB TRANS BOARD R326A TRANS B'D<--->MAIN B'D BN41 CJP03GA89ZY CN42 18(1/4W) BN43 CUP12263-6 D111 1N4003 2SD2560 A1360Y KTA1024Y Q310A POWER SECONDARY PART Q307A D112 Q304A R328A 1N4003 T401 EUR, UK : CLT5U038ZE R305A...