Onkyo-DTA9.4-avc-sb维修电路原理图.pdf

2-1 NISSHIN-CHO,NEYAGAWA-SHI,OSAKA 572-8540,JAPAN Service EngineeringGroup, Customer Relations Dept. Symptom: When an excessive signal is inputted into amplifier, DC detection circuit operates and results No sound. Cause: The DC current detection circuit is too sensitive. Procedure for service: In NAAF-7797 R593, chip resistor is changed from 10K to 3.3K DAT-9.4 has seven units of NAAF-7797 and do this change for all units. Refer to the attached file-Page 2 Application: .All seven power amplifier modules per unit. Marking: Mark A after the serial number. Revised: By Gedion Teklewolde History: SERVICE BULLETIN NO:03007 MANAGER Kiyoshi Matsuoka GL Seiji Ichikami DESIGN Terukazu Matumi 2003/07/25 2003/07/25 2003/07/25 MODELS : DTA-9.4 SUBJECT : Improvement of the sensitivity of DC detection circuit Circuit No. Before changeAfter changeDescriptionRemarks Part No.DescriptionPart No. R593435031034R1RN72K1J-103J435033324R1RN72K1J-332J 1 of 2 RadioFans.CN 收音机爱 好者资料库 DTA-9.4 U15 D DD D C601 C601 C602 C602 L505 L505 L506 L506 RL501 RL501 R539 L507 L507 C611 R607 C521 C612 R516R517 C506 C505 C502 RL701 RL701 R514 R512 R515 R513 P501 P502 P301 P301 R503 R501 R510 RL502 RL502 Q504 Q503 R509 R552 R507R508 R533 R531 C514 R534 R532 C515 D510 D509 R518R519R537 R538 Q506 Q505 D503 D504 Q511Q512 D502 D501 D508 D507 C509 C518 Q513 Q514 D513 D514 R506 Q501 Q502 C503 R505 C501 C507 C508 R504 R502 C504 Q509 Q510 C513 R521 R523 C517 C516 Q508 Q507 R525 R527R526 R553 R520 C512 R522 R524 R528 C510C511 R529 R580 C580 R581 R582 R583 R584 R585 R586 C584 C583 C586 C587 C585 E501 C582 P701 P702 P302 P302 E601 C615 Q602 Q601 S301 S301 R317 R311 R322 R319 C308 C309 R327 R328 L601 L601 L602 L602 C603 C604 R547 R546 R542 R543 R545 R595R596 C410C411 Q605Q606 R601 R602 C525 C524 C523 R321R310 R302 R303 R320 R304 R305 R301 R306 C302 C305 C304 C303R318 R308 R316 R307 R309 R312 R329 R330 C311 C310 R315R326 C306 R314 R323 C307 R325 R401R402 R404R403 Q717 Q717 R606R605 C526 R544 C401 R407 R411 R410 C403 C402 R416R417 R412 R413 R414 R418 R419 R415 C409 C408 C610 C609 R603 R604 JL701A C703 R722 R724 R723 Q708 D751D705 Q610 C607 C608 C751 Q753 R721 C613 C701 C614 R511 R530 C605C606 R597 C581 C522 R540 NCAF-7797 TEMPERATURE CURRENT WARNING OR DC OUTPUT R331 Q754 R755 C529 R554 R555 C530 R556 C531 R557 C532 BLACK WHITE P703 C301 Q303 R342 R335 R334 C312 R336 C314 C313 C316 C315 R341 R594 R593 R591 D580 D581 R589 R340 R339 R337 R338 1 25137797A 1 C705 R611 R430 R409 R609 R608 R406 R405 R610 Q752 R751 Q704 1 P504 P503 INDICATOR P607A P608B OFFSET Q581 R612 R560 R561 C535 D518 Q518 R558R559 C534 D517 Q517 Q604Q603 C616 C617 R701 C707 C618 D710 MODULATOR OPERATION C412C413 E E B B B BE E G SSS G G G S IIOOGG G O I E EBB I IG G O O GMUTE PHTCP OUTRL FMUTE ERR +5VC GNDC 17 1 C519 C520 C404C405 R343 R344 R730 Q711 Q711 R551 R550 R549 R548 1 EB P303 P601AP601C P601B C702 J301 J302 P704 C753 R735 Q702 P608A P607B L507 R580 C580 R581 R582 R583 R584 R585 R586 C584 C583 C586 C587 C582 R318 R316 R597 C581 R342 R335 R334 C312 R336 R594 R593 R591 D580 D581 R589 P6 Q581 1 R344 P303 P607B R593 SERVICE BULLETIN NO:03007 Component side POWER AMPLIFIER PC BOARD (NAAF-7797) 2 of 2 RadioFans.CN 收音机爱 好者资料库