Akai-AT-V350-R-Service-Manual(1) 电路图 维修手册.pdf

《Akai-AT-V350-R-Service-Manual(1) 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《Akai-AT-V350-R-Service-Manual(1) 电路图 维修手册.pdf（18页珍藏版）》请在收音机爱好者资料库上搜索。

1、SERVICE MANUAL Model: ATV350R RECIVER WITH MONITOR www.akai.ru RadioFans.CN 收音机爱 好者资料库 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 05V or 50V chang

2、e is available on CPU (7) pin or not Check whether +5V supply of CPU is normal or not Check whether input +12V and 78L05 is broken or not Change CPU Check whether C1815, B1203 for ON/OFF of CPU and subsequent supply circuit is short-circuited or not. Change 32K crystal oscillation. Change B1203, C18

3、15 Check whether each voltage for the output of power supply is normal or not Repair power supply and supply circuit Check whether high voltage supply N25 is open-circuited or not Change audion of high voltage circuit or the high voltage transformer Check whether output of high voltage is available

4、or not Change high voltage transformer Change LCD screen Yes No Yes Yes Yes Yes No No No No No No No Check whether external circuit for key input pin and CPU (10) (11) pins are normal or not. Yes RadioFans.CN 收音机爱 好者资料库 AKAI ATV-350R Maintenance Manual 2. Repairing Procedures for Inferior Color Chec

5、k 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. Check whether loop of 3Y26 (6) (8) (9) and LA76810 (19) (20) (21) is normal or not Change module of LCD software Change the broken el

6、ements of loop Check whether periphery pf 3Y26 is normal or not Change 3Y26 Yes No Yes No No No RadioFans.CN 收音机爱 好者资料库 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 Whether the earthing resistance of

7、 LA76810 (29) pin is normal or not. Check power supply Check whether LA76810 (13) (12) (11) pins are normal or not Yes No Yes Yes No No Check whether line field pulse of CPU is normal or not. Check whether the copper sheet of line field synchronous pulse loop is open or short-circuited or not. Chang

8、e 3Y26 Whether change CPU is OK. Change the resistance Yes No No Check the LA76810 line field synchronous circuit. No Check LCD screen AKAI ATV-350R Maintenance Manual 4. Repairing Procedures for Line Field Asynchronization Check whether to 3Y26 (2) pin is OK or not Check whether +5V, +8V power supp

9、ly 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 Change module Change 3Y26 Yes No Yes Yes No Check peripheral circuit of 4001 1C (circuit for treatment of line field synchronization) Change LCD screen

10、No Yes No 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 supply is normal or not

11、 Check whether 3Y26 is broken or not Check the loop of power supply circuit Test whether +5V, +17V and 15V of bus socket is normal or Yes No Yes No No Change module of LCD software Change LCD screen Yes No Check the loop of power supply No AKAI ATV-350R Maintenance Manual 6. No Signal Test whether +

12、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 periphery of (50) pin for pre-central amplifier Check whether circuit of pre-central amplifier and periphery of LA76810 (50) pin is normal or not Yes No Yes No No Check

13、 whether AGC voltage for +5V power supply of high frequency head is normal or not Change high frequency head Yes No Check 5V power supply and AGC circuit Yes AKAI ATV-350R Maintenance Manual 7. No Storage of Program Check whether 32V tuning voltage is stable or not Repair tuning loop Check whether A

14、FT circuit is normal or not Repair AFT circuit Yes No Yes No Change high frequency head and sound surface 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 o

15、r not No Yes No Yes Yes Test whether power amplifier 386 is broken or not Check whether LA76810 (1) (2) pins are normal or not Change peripheral circuit of (52) (53) (54) Change peripheral elements of (1) (2) pins Change LA76810 Yes No Check whether LA76810 (52) (53) (54) pins are normal or not No A

16、KAI ATV-350R Maintenance Manual 9. Dark Light Check whether contrast and brightness are adjusted to minimum or not Adjust till OK Check whether power supply of each circuit is normal or not Adjust potentiometer of mainboard BRI to see whether there is change or not Change 3Y26 No Yes No Yes Set anal

17、og quantity of TV at standard Yes Check whether peripheral elements of 3Y26 are normal or not No Check supply circuit 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 CPU (22)

18、(25) to LA76810 (13) (16) is normal or not No No Yes Check whether pulse input of CPU line field synchronization is normal or not Change loop elements Yes Check line field synchronization circuit Inferior character color Change CPU or LA76810 No Yes AKAI ATV-350R Maintenance Manual 11. No Picture or

19、 No Sound in AV Check whether connection conversion line is normal or not Change AV conversion line Check input socket Change input socket Change LA76810 No Yes No Yes Check the loop of audio and LA76810 (51) pin, and the loop of video and LA76810(42) pin AKAI ATV-350R Maintenance Manual 12. Without

20、 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. Change peripheral circuit Change peripheral elements Yes NO No Yes Check whether IC7088 voltage pin are normal or not Change IC7088 Yes No Check whether I

21、C7088 pin (5)(11)(2) are normal or not No AKAI ATV-350R Maintenance Manual 13. Battery box can not charge Put on the position of charging ON Change IC 34063 Check whether IC 34063 (1) (3)(5) (7) pins voltage is normal or not Check whether if it is on the charging position yes No Yes Change bad eleme

22、nts No 11 22 3 34 4 5 5 CF1 CF38.0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 IC14 1 2 3 4 5 6 7 89 10 11 12 13 14 15 16 IC8 LA7642N 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 2122 23 24 25 26 27 28 2

23、9 30 31 32 33 34 35 36 37 38 39 40 41 42 IC1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 2728 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 IC5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36

24、37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 IC15 A01 A12 A23 A34SDA 5 SCL 6 TEST 7 VCC(5V) 8 IC6 24C04 1 2 3 4 5 U1 IC5 1 2 3 45 6 7 8 IC7 TDA7052A AGC 1 VT 2 BU 3 BH 4 BL 5 BM 6 IF 7 ANT 8 IFU1 TDQ-3CV1 1 2 3 4 56 7 8 9 10 T2 TRANS-09 1 2 3 4 56 7 T1 TRANS-PC

25、O43 1 2 3 4 5 6 78 9 10 11 12 13 14 IC10 1 2 3 4 5 6 78 9 10 11 12 13 14 IC9 1 2 3 4 5 6 7 89 10 11 12 13 14 15 16 IC12 74HC4053 DK1 ANT DK2 AV DK3 OULT DC1 12VIN C150 104 R179 100 R175 100 R178 100 R176 51K R177 62K R180 47K R181 33K C173 104 C174 104 C175 104 +7V 5V C177 104 C178 104 C179 104 C180

26、 104 R182 12K C176 220uF 5V C181 104 C182 104 C183 104 R184 1K5 R185 1K5 R186 1K8 R138 47K R139 47K R140 36K R141 47K R142 27K R143 47K R144 47K R153 1K R146 36K R147 56K R148 47K R149 36K R150 47K C148 104 C149 104 C151 104 C152 104 C153 104 C154 104 5V R151 100 R152 100 R155 36K R183 47K R154 30K

27、R156 51K C157 104 C156 104 R157 10K R158 10K R159 10K C8 103 C1 104 C2 100uF C4 22uF C5 10uF C6 10uF C7 10uF R5 150 R1 100 R2 4K7 R49 220 R51 1K R52 33 ANT1 C9 104 C12 104 C11 104 R4 22K R8 22K R10 22K R3 12K R6 51K R9 22KR11 470 R15 4K7 R12 10K R14 1K2 C13 680P C14 100P R13 10K R16 10K R17 10K R18

28、10K R19 680 R20 10K R23 10K R25 330 R27 270K R29 4K7 R31 4K7 R32 8K2 R34 1K5 R255 3K3 D11 IN4148 R134 1K C3 104 C60 102 +5V C37 103 +8V R59 22K R61 100 R62 22K R63 22K R64 22K R65 100 R66 22K R67 100 R69 22K R70 22K R71 220 R72 22K R73 220 R75 3K3 R76 4K7 R77 3K3 R79 4K7 D1 IN4148 D2 IN4148 X1 32K C

29、15 18P C16 15P 1 2 3 4 P1 IR C5V KEY GND C18 103 C19 1uF C20 22uF Q2 A1015 ZD1 3V9 C21 103 AV2 L/R U/D REMOTE SD SCL SDA C5V C5V C5V C5V C5V +5V AGC +33V 16:9 4:3 VOR POWER REMOTE P/N R48 4K7 R50 3K3 C36 103 C38 223 C39 223C40 103 C41 103 R53 100K R55 100K R5727K C43 1uF +5V SD BO GO RO +8V BLK B G

30、R SCL SDA AFT C44 1uF R60 100K +5V R68 2K2 R74 120 R78 3K3 R80 2K2 R81 10K C47 474 C48224 C49 333 C50 1uF C51 100uF VER +5V +8V AGC VOL C82 39P C85 102 C86 1uF C87 18P R101 1K R103 330 L6 15uH C90 10uF C98 10uF C94 0.47uF C89 0.47uF AUDIO R105 180K R104 220 C92 470P C91 56P LT2 VIDEO R109 1K5 R110 1

31、K R111 22K R112 560K R108 47K C96 1uF C95 4u7 C97 0.47uF +5V C99 103 C100 220P R114 100 R115 1K R113 2M +5V C101 18P X2 4.433MHz C105 10uF C103 103R116 1K R117 10K R118 150 C102 103 C104 103 C107 103 Q13 A1015 C108 103 +5V C115 103 C114 103 C111 10uF C113 100uF R120 100 R121 10K R122 1K R123 4K7 R12

32、4 1K R125 4K8 R119 1K +8V CHROMA C106 1uF C109 1uF C110 1uF C112 1uF C155 1uF C158 1uF +8V C84 4u7 C88 220uF C93 4u7 C83 472 R100 5K1 R102 39 R106 22K R107 10K R145 47 1 2 P4 + - R83 10K R128 1K R82 2K2 R85 10K R86 33K R87 10K R89 10K R91 10K C120 104 +8V C116 47P +8V C117 105 C118 102 C119 102 R126

33、 1K R127 1K R129 10K R130 4K7 R131 33K C121 102 VS BLK R G B HS VS CHRDMA AFT C5V C122 103 C123 103 C124 103 VER 1 2 3 P5 3V GND VOL ANT D3 IN5819 C29 104 C22 104 C23 104 C24 104 C25 104 C26 104 Vin1 GND 2 Vout 3 IC3 78L05 C31 470uF C28 100uF R40 47 R36 10K R37 1K R38 1K R39 10K Q5 D1203 FU2 C32 220

34、uF C35 683 L1 100uH R47 4K7 C34 22P/3KV 1 2 P3 1 2 3 45 6 7 8 IC4 C33 104 C74 103 C30 102 R42 680K R43 36K R44 6K8 R45 2K2 R46 100K R41 180K R94 100 R96 22K R99 2K2 VR1 1K C61 10uF C64 100uF C27 220uF L3 D10 IN5819 D8 IN4937 D9 IN4937 D4 IN5819 D7 IN4937 D6 IN5819 C58 100uF L2 100uH L4 100uH L5 100u

35、H C66 104 C129 104 C77 104 C55 104 C125 104 C126 104 C127 104 C62 104 C72 104 C69 104 C73 104 C136 104 C137 104 C78 104 C79 104 C140 104 C141 104 C190 104 C191 104 C192 104 C189 104 C195 104 C196 104 C202 104 C203 104 C204 104 C54 220uF C57 100uF C56 100uF C63 47uF/25V C128 100uF C75 10uF C76 100uF

36、C81 220uF C71 220uF C70 22uF/50V C67 22uF/50V C80 22uF/50V R93 10K R97 2K7 ZD2 17V ZD3 33V C188 22uF/50V C194 22uF/50V Vin 1 GND 2 Vout3 IC16 LM3480 VCC VCC1 5V5V 5V +5V +17V +17V +8V +7V-15V -15V +12V C52 103 C5V 1 2 3 45 6 7 8 IC13 R214 8K2 R167 5K6 R169 1K R170 10K R172 100 R173 10K R229 20K VR3

37、10K VR4 30K C168 47uF C171 10P C172 10uF C193 104 C166 104 C167 10P VCOM EOLS VGL AVDDVEEVGH +33V VCC C160 104 C161 104 VCCVCC1 C185 102 R160 15K R161 47K R162 20K R163 10K R165 10K R187 39K R188 10K R189 200K R190 15K R191 10K R192 10KR193 560 Q17 C186 104 R200 39 R203 560 R207 560 R209 560 R210 56

38、0 C165 1uF R199 1K C210 10P R194 10K R195 560 R196 560 R197 560 R238 150 VR5 5K VCC C184 100P VCC1 VS HSY NPO OBLK POLCFRP EOLS PSC PSI OMCLK VCC VIY CSY MM MM U/D L/R INH Q2H STHL STHR CPH3 CPH2 CPH1 C197 702 C198 103 C199 360P C200 102 C201 102 LT3 14.5uH R237 15K R239 20K R240 560 R241 1K R242 10

39、0K R243 560 R244 560 R245 560 R246 560 R249 10K R219 10K R222 10K R223 10K VCC AVDD PDA CPV DIO1 DIO2 XOE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 CON1 28PIN R231 10K R232 10K R233 150 R234 150 GND VGH VCC GND VEE VGL DIO1 DIO2 U/D CPV XOE VCOM VCOM L/R INH Q2H STHL

40、 CPH1 CPH3 CPH2 VCC GND VR VG VB AVDD AVDD GND STHR AV2 POWER HT-TR350LA R84 1K R88 1K R90 100 R92 75 AUDIO VIDEO VEE VCC +12V VOR Vi R133 1K R135 220 C5V C5V RO GO BO CSY PSI FRP VBVRVG B RG SYNC SYNC VOL Vi AVDD AV2 C211 222 VR2 5K Q14 C1815 Q15 Q16 Q11 C1815 Q3 C1815 Q4 C1815 Q7 DK Q8 DK Q12 AB29

41、Z Q1 C1815 Q9 R7 1K C45 104 C46 104 R168 10K R171 10K R174 10K R164 10K AVDDU/D L/R R198 10K R201 3K3 R204 3K3 R205 2K2 R202 10K Q20 C1815 Q19 C1815 PT4 PT3 C213 1uF C212 10uF C206 102 R98 4K7 R253 4K7 R254 1K R21 4K7 R22 1K5 R24 2K7 R26 3K9 R28 4K7 R30 8K2 R33 27K R35 180K SK1 POWER SK2 TV/AV SK3 M

42、ENUV SK4 VOL- SK5 VOL+ SK6 CH- SK7 CH+ LED1 VCC3 GND2 IR1 IC2 REMOTE C17 104 1 2 3 4 P2 IR C5V KEY GND 1 2 3 4 5 6 7 89 10 11 12 13 14 15 16 IC11 C130 220P C131 25P C132 470P C133 82P C134 104 C135 330P C138 392 C139 473 C142 180P C143 202 C144 473 C145 332 C146 104 C169 104 C147 202 SK8 SCAN SK9 RE

43、SET L7 6T L8 7T CD1 C170 100uF LED2 R256 1K R166 1K R136 6K8 R137 33K D5 IN4148 1 2 3 4 P6 3V GND VOL ANT 收音机 R132 4K7 R218 1K HS R261 100 R260 100 ZD5 3V9 Q25 C1815 C220 10uF 5V 1 2 3 45 6 7 8 IC17 R54 0.22 R56 180 R58 1K2 R95 18K R208 2K L9 100uH C59 102 D12 IN4937 DC2 12ViN C10 100uF C42 100uF R206 3K P8 Vo P7 GND Q6 B772 R211 2K R212 1K R213 18K2 R217 3K9 R215 820 LED3 D13 IN4007 R216 1M 电池盒充电板 1 2 3 U2 431 R220 2K D14 IN5819 VK1 SS-12D01 C68 1uF C65 221 R221 27K Q10 C1815 +5V +5V R224 10K 1 2 3 45 6 7 8 IC18