Onkyo-TXSR303-avr-tt 电路图 维修手册.pdf

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1、_ CONFIDENTIALITY NOTICE: This document and the information it contains is intended for the exclusive use of Authorized ONKYO Service Centers and their employees. This document may contain information that is privileged, confidential and exempt from disclosure under applicable law and terms of the O

2、NKYO Service Agreement. Any dissemination, distribution or copying of this document and the information it contains is strictly prohibited. CONFIDENTIAL Technical Tip 18 Park Way, Upper Saddle River, NJ 07458 Date: May 25, 2006 _ Model: HTR-330/530, TX-SR303/SR503 Subject: General troubleshooting fo

3、r Protect problem. RadioFans.CN 收音机爱 好者资料库 HTR520,TXSR502. Use scope to check at power on before unit go protection - Replace all driver transistors at the def.channel at the same time - Basic check out on receive you work on before submit PCB Auth Request. Please give us Voltage info on each DSP IC

4、s and where you lost audio signal ? RadioFans.CN 收音机爱 好者资料库 HTR520,TXSR502. 1 . Normal audio using analog inputs. Do you have all Dolby surround sound ? 2 . All DSP voltages are normal ? Did all supply voltage go to all ICs ?+5vDSP, 2.5V,+3.3V. +7v,-7V. 3 .Input sel IC. Use CD analog input audio sig

5、nal (ADRT+,ADRT- and ADLT+,ADLT-) out to DAC IC ? Surround analog signal out (DAC L,DAC R,DAC C,DAC SW,DAC LS, DAC RS ,DAC SB* back to Input sel.IC. Pin 1 to pin8 out to p5504. ( Same as pre out) check Mutting transistors Q5600 to Q5617 . 4 . When use digital input signal did digital light up on dis

6、play ? If missing 3.3v,2.5v 5vdsp (on Reg IC Q5640) to DSP ICs will disable DSP function. (U05 Amplifer PC board) Please use TX-SR502 as sample Technical Tip Troubleshooting. When you need Tech help Please use Tech Email and give us Voltage and signal info. What voltage on DSP ICs and whereyou lost

7、audio signal ? What you have on input IC Data line Check with TX-SR502 Troubleshooting tips for the Microprocessor and Audio Select IC Pop noise in speakers Check next page info you have DC in audio line at any channel . RadioFans.CN 收音机爱 好者资料库 Dsp board no audio signal output ONKYO USA CORPORATION

8、200 W illiams Drive Ramsey NJ 07446 201-825-7950 Fax 201-825-8150 Title: TX-DS575 Date: 04/13/03 Classification: Service Tip Ref #: TXDS575MUTE Symptom: Receiver shuts down when source, Speakers are selected or volume is set to MIN. position. Solution: Defective components Referring to Page 41 and 4

9、2 of service manual find all location of muting transistors used. Anyone of the following transistors at location Q3383, 3483, 3186, 3187, 3188, 3684, 3683, 3583, 3283, 3183 may be leaky. In the exception of Q3187 and Q3188, the emitter voltage of the above-described components should not exhibit an

10、y DC volt presence in excess of 12mv to max 20mv while operating. Mute duration is governed by C3194. Muting control DC volt (+2.6) passes through Q3185. The base of all muting transistors is -12vdc when unit is operating normal. When in mute mode, muting transistors base voltage goes to approximate

11、 +2.6vdc. Q3184 pins 1,2,3,4,8,9,10,11 are expected to be DC free. If Any DC is noticed, Q3184 may be defective. Troubleshooting Steps and Procedure: Since the unit is likely to shut down if any one of the function switches or volume controls reach MIN, do the followings to keep the unit ON. 1) On t

12、he power amplifier PCB locate P601A. Then Short all the connector pins together. 2) Locate Front amplifier input connector P520A. Short all the connector pins together EXCEPT FIRST PIN, which is 24vdc carrier. This condition will allow the unit to stay ON allowing troubleshooting without unit shutti

13、ng down. * Do not forget to remove or clean short when service is complete. _ CONFIDENTIALITY NOTICE: This document and the information it contains is intended for the exclusive use of Authorized ONKYO Service Centers and their employees. This document may contain information that is privileged, con

14、fidential and exempt from disclosure under applicable law and terms of the ONKYO Service Agreement. Any dissemination, distribution or copying of this document and the information it contains is strictly prohibited. CONFIDENTIAL Service Bulletin 18 Park Way, Upper Saddle River, NJ 07458 No. 004 Date

15、: August 24, 2005 _ Model: TX-SR602/702/DTR-4.5/5.5/6.5 Subject: No sound in Surround mode Symptom: No sound in Surround mode. Coil L921 which is located on the DSP board may have opened due to in rush current. Solution: Check coil L921, if open, replace L921 with the improved part (green print). Pa

16、rts: FORMER NEW Ref # Description Part Number Description Part Number L921 NCH-1587-022 233533K022R2 NCH-1471 231237M022R2 _ CONFIDENTIALITY NOTICE: This document and the information it contains is intended for the exclusive use of Authorized ONKYO Service Centers and their employees. This document

17、may contain information that is privileged, confidential and exempt from disclosure under applicable law and terms of the ONKYO Service Agreement. Any dissemination, distribution or copying of this document and the information it contains is strictly prohibited. CONFIDENTIAL Technical Tip 18 Park Wa

18、y, Upper Saddle River, NJ 07458 Date: January 3, 2006 _ Model: TX-SR602/SR702 can be use other Receive Subject: Unit Displays “Auto Speaker Setup” and locks up. Symptom: The unit displays “Auto Speaker Setup and locks up. There is no sound and you cannot exit the Menu Screen. Solution: No +7V to Fro

19、nt panel, +7 volt regulator Q303 found to be overheating and +7V on pin 19 of the Selector IC Q302 was shorted. Replaced regulator IC Q303 and Selector IC Q302 and normal operation was restored. Tip submitted by R. Jackson of Goodman TV, Addison, TX. Check all voltage on Amp. power board and DSP boa

20、rd. Repair low voltage you fix the problem. Parts: Ref# Description Part Number Q302 NJW1157B 22242193R3 Q303 78L07 222780073R2 ONKYO : TXSR602 * - Serial Numbers within range (Last 7 digits) ?0020001 thru ?0029999 with Q701 IC description being M30627FHPGP Serial Numbers within range (Last 7 digits

21、) ?1020001 thru ?1029999 with Q701 IC description being M30627FHPGP ONKYO : TXSR702 * - Serial Numbers within range (Last 7 digits) ?0020000 thru ?0028751 with Q701 IC description being M30627FHPGP * NOTE : Units with Q701 description of M30627MHP are not upgradeable and the IC needs to be replaced. Symptom & Relative model: 1) Any CD/HDCD hybrids which are played into these models digitally, no audio is output. Solution: Perform firmware up-grade procedure below with the latest version posted under Upgrade section on service web site.