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Summary of Contents for Akai ATV-350R
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Page 1: Service Manual
RECIVER WITH MONITOR Model: ATV350R SERVICE MANUAL www.akai.ru... - Page 2 AKAI ATV-350R Maintenance Manual ATV-350R Maintenance Manual 1. Repairing Procedures for No sound, No Picture and No Light Check whether power indicator lights in red. Press POWER to check whether 0~5V or 5~0V change is available on CPU (7) pin or not...
- Page 3 AKAI ATV-350R Maintenance Manual 2. Repairing Procedures for Inferior Color Check whether output voltage from LA76810 (19) (20) (21) is normal or not Whether LA76810 (30) (31) pins are short-circuited or not and whether (18) pin is normal or not.
- Page 4 AKAI ATV-350R Maintenance Manual 3. With Sound, With Light and Black Screen Check whether power supply of LA76810 (25) (18) pins is normal or not Check power supply Check whether LA76810 (13) (12) (11) pins are normal or not Check whether line field pulse of CPU is normal or not.
- Page 5 AKAI ATV-350R Maintenance Manual 4. Repairing Procedures for Line Field Asynchronization Check whether +5V, +8V power supply of LA76810 is normal or not Repair power supply Check whether peripheral circuit of LA76810 (26) pin is normal or not Change 1UF 333 capacitance...
- Page 6 AKAI ATV-350R Maintenance Manual 5. Repairing Procedures for White Light Test whether the switch power supply +5V, +8V and –15V is normal or not Whether repair power supply and subsequent circuit is short-circuited or overloaded Test whether 3Y26, +5V and +7.5V power...
- Page 7 AKAI ATV-350R Maintenance Manual 6. No Signal Test whether +40V is normal or not Check 40V loop Test whether wave band switch voltage is available with CPU (1) (41) (42) pins Change CPU Check whether AGC voltage for +5V power...
- Page 8 AKAI ATV-350R Maintenance Manual 7. No Storage of Program Check whether 32V tuning voltage is stable or not Repair tuning loop Check whether AFT circuit is normal or not Repair AFT circuit Change high frequency head and sound surface...
- Page 9 AKAI ATV-350R Maintenance Manual 8. With Picture, No or Low Sound and Distortion Test whether loudspeaker is open circuited or not Change loudspeaker Test whether power amplifier 386 is broken or not Test whether power amplifier 386 is broken or not...
- Page 10 AKAI ATV-350R Maintenance Manual 9. Dark Light Check whether contrast and brightness Check whether power supply of are adjusted to minimum or not each circuit is normal or not Check supply circuit Adjust potentiometer of mainboard BRI to Set analog quantity of TV at standard...
- Page 11 AKAI ATV-350R Maintenance Manual 10. With Picture, With Sound, No Character or Inferior Color Check CPU 32K crystal oscillation Change 32K crystal oscillation Check whether pulse input of CPU line field synchronization is normal or not Check line field synchronization circuit...
- Page 12 AKAI ATV-350R Maintenance Manual 11. No Picture or No Sound in AV Check whether connection conversion line is normal or not Change AV conversion line Check input socket Change input socket Check the loop of audio and LA76810 (51) pin, and the...
- Page 13 AKAI ATV-350R Maintenance Manual 12. Without radio Test whether the indicator light is red or not Test power is on or off Test whether IC7088 (11) pin is with noise or not with screwdriver. Check whether IC7088 voltage pin are...
- Page 14 AKAI ATV-350R Maintenance Manual 13. Battery box can not charge Check whether if it is on the charging position Put on the position of charging Check whether IC 34063 (1) (3)(5) (7) pins’ voltage is normal or not Change bad elements...
- Page 16 ANT1 C148 R139 15uH IFU1 R138 R176 R180 R181 TDQ-3CV1 R100 IN4148 C173 C149 R179 R175 R178 R177 R101 R141 C206 R134 C150 R140 C174 R255 VIDEO TDA7052A C151 R103 R102 R143 C175 AUDIO R105 R144 0.47uF 22uF 10uF 10uF 10uF 180K 10uF...
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