Marantz-SR-7400-Service-Bulletin 电路图 维修手册.pdf

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1、Approved by S.NAGAO Written by WQ-19 2 817/additional rule 3 (1st Issue 2003-03-19) Date:5-Mar.-2004Model:SR5400,SR6400,SR7400 Page:1 / 1REF.NBR:MZ04-019 Circulation:Application: Subject: Int.ref: PHENOMENON In idling state, if time passes, the top cover becomes very hot. SOLUTION 1) Idling adjustme

2、nt is changed to the following contents. A. The target setting voltage changes according to ambient temperature. B. Adjustment time and Measurement Voltage after the Power ON are changed. C. Adjustment is impossible when ambient temperature is 9 degrees centigrade or less. 2) The setup of Master Vol

3、ume-Minimum, Speaker out-No load, and Top lid-OPEN does not change. 3) Alignment Point and Measurement Point do not change. 4) Ignore 2 and 3 of Idling Current Alignment on the service manual (SR5400/SR6400 is 59 page and SR7400 is 57 page). Ambient temperature and Measurement Voltage of change are

4、the following table. Ambient temperature 10 to 19 degrees centigrade Ambient temperature 20 to 30 degrees centigrade Measurement Voltage Measurement Voltage 5 min.1.2 mV +- 0.3 mV2.0 mV +- 0.3 mV 10 min.1.2 mV +- 0.3 mV2.1 mV +- 0.3 mV 20 min1.4 mV +- 0.3 mV2.5 mV +- 0.3 mV 30 min1.6 mV +- 0.3 mV2.7

5、 mV +- 0.3 mV 40 min1.7 mV +- 0.3 mV2.9 mV +- 0.3 mV 50 min1.8 mV +- 0.3 mV3.1 mV +- 0.3 mV 60 min.1.9 mV +- 0.3 mV3.2 mV +- 0.3 mV After Turning ON REMARKS -The countermeasure apply to this claim only. -With the Unit which has returned from the customer by repair, Please also readjust the following

6、 serial number. This problem apply to following week code. SR5400 / SR6400 / SR7400 apply to MZ020405xxxxxx. This improvement has been done in the production the week code MZ020406xxxxxx and after. SERVICE BULLETIN By idling, Top cover becomes very hot so that it cannot touch by hand. x for informat

7、ion customer complaint in case of service mandatory . See below Approved by S.NAGAO Written by WQ-19 2 817/additional rule 3 (1st Issue 2003-03-19) Date:15-Mar.-2004Model: SR7400 Page:1 / 1REF.NBR:MZ04-025 Circulation:Application: Subject: Int.ref: PHENOMENON 1) It occurs when Digital connection of

8、HDD recorder (by Panasonic or Toshiba product). 2) The sound output of SR7400 is muted by HDD recorder operation. SOLUTION 1) Update the CPU(IC28)s software version to V040218_2x 2) Update the DSP(IC20)s CODE ID 02 to CD02_02010116 3) Please refer to the service manual SR7400 page58 to 62, about det

9、ails of “10.SERVICE MODE” and “ 12.UPDATE FIRMWARE ”. NECESSARY PART Update of the firmware disc *SR7400CD2 REMARKS The countermeasure apply to this claim only 1) This problem apply to the following service change code. SR7400/K1G/N1B/N1S /S1G/U1B apply to MZ02xxxxxxxxxx This improvement has been do

10、ne in the production the service change code MZ03. 2) The model SR7400/L1G has improved from the top of mass production. SERVICE BULLETIN Cant decode input signal by the operation of other company HDD RECORDER.x for information customer complaint in case of service mandatory . See Below File name of

11、 SR7400_Soft.zip for CPU File name of DSPROM_04_02_18.zip for DSP Approved by S.NAGAO Written by WQ-19 2 817/additional rule 3 (1st Issue 2003-03-19) Date:5-Mar.-2004Model:SR5400,SR6400,SR7400 Page:1 / 1REF.NBR:MZ04-019 Circulation:Application: Subject: Int.ref: PHENOMENON In idling state, if time p

12、asses, the top cover becomes very hot. SOLUTION 1) Idling adjustment is changed to the following contents. A. The target setting voltage changes according to ambient temperature. B. Adjustment time and Measurement Voltage after the Power ON are changed. C. Adjustment is impossible when ambient tempe

13、rature is 9 degrees centigrade or less. 2) The setup of Master Volume-Minimum, Speaker out-No load, and Top lid-OPEN does not change. 3) Alignment Point and Measurement Point do not change. 4) Ignore 2 and 3 of Idling Current Alignment on the service manual (SR5400/SR6400 is 59 page and SR7400 is 57

14、 page). Ambient temperature and Measurement Voltage of change are the following table. Ambient temperature 10 to 19 degrees centigrade Ambient temperature 20 to 30 degrees centigrade Measurement Voltage Measurement Voltage 5 min.1.2 mV +- 0.3 mV2.0 mV +- 0.3 mV 10 min.1.2 mV +- 0.3 mV2.1 mV +- 0.3 m

15、V 20 min1.4 mV +- 0.3 mV2.5 mV +- 0.3 mV 30 min1.6 mV +- 0.3 mV2.7 mV +- 0.3 mV 40 min1.7 mV +- 0.3 mV2.9 mV +- 0.3 mV 50 min1.8 mV +- 0.3 mV3.1 mV +- 0.3 mV 60 min.1.9 mV +- 0.3 mV3.2 mV +- 0.3 mV After Turning ON REMARKS -The countermeasure apply to this claim only. -With the Unit which has return

16、ed from the customer by repair, Please also readjust the following serial number. This problem apply to following week code. SR5400 / SR6400 / SR7400 apply to MZ020405xxxxxx. This improvement has been done in the production the week code MZ020406xxxxxx and after. SERVICE BULLETIN By idling, Top cove

17、r becomes very hot so that it cannot touch by hand. x for information customer complaint in case of service mandatory . See below Approved by S.NAGAO Written by WQ-19 2 817/additional rule 3 (1st Issue 2003-03-19) Date:9-Jan-2004Model: SR7400 Page:1 / 1REF.NBR:MZ04-003 Circulation:Application: Subje

18、ct: Int.ref: PHENOMENON 1) When Dolby Digital and dts decoding, the sound cut for about 0.5-second occurs at random. It doesnt occur in PCM decoding. 2) It occurs when Dolby Digital and dts are decoded with AUTO MODE. 3) Occurrence timing varies in the production time of the IC. Therefore, when this

19、 phenomenon occurs for a short time, or even if 30 minutes or more pass, it may not occurs. REASON Capacitor C281 (33pF) of the measure against EMC has influenced. By the capacitor C281, the standup of a clock pulse becomes late, DSP incorrect-detects the noise, and Auto Mute of DAC incorrect-operat

20、es. SOLUTION Capacitor C281 ( 33pF) is removed on DSP PCB. As for details, Please see page 2/2 REMARKS 1) This problem apply to the following serial number. SR7400/U1B apply to MZ000345002450 SR7400/N1B apply to MZ000351000530 SR7400/N1S apply to MZ000351000840 2) The following model has improved fr

21、om the top of mass production. SR7400/L1G SR7400/K1G SR7400/S1G SERVICE BULLETIN Sound cut (short-time) of Dolby and dts decoding. x for information customer complaint in case of service mandatory . See Below SERVICE BULLETIN REF. NBR: MZ04-003 Model : SR7400 Page2/2 SERVICE MANUAL page15 DSP PCB 1/

22、2 DSP PCB C281 REMOVAL PROCEDURE 1) Remove 9 screws of VIDEO PCB from REAR PANEL. 2) Remove 2 screws from VIDEO PCB. 3) Disconnect the connector and Flexible Flat Cable from VIDEO PCB. 4) You can remove VIDEO PCB, then you can see C281. 5) Remove C281. VIDEO PCB C281 Approved by S.NAGAO Written by W

23、Q-19 2 817/additional rule 3 (1st Issue 2003-03-19) Date:9-Jan.-2004Model: SR7400 Page:1 / 3REF.NBR:MZ04-004 Circulation:Application: Subject: Int.ref: PHENOMENON 1) It occurs when the VIDEO CONVERT FUNCTION of SR7400 is used. “S-Video or CVB video signal input of PAL system” is outputted to Compone

24、nt Video Out, the synchronization of picture is disturbed. 2) The reappearance procedure of a phenomenon -1. “S-video or CVBS Video signal of PAL system” is inputted to optional Function. -2. The Converted Component Video output appears on the screen. -3. Press the POWER ON and OFF Button on the rem

25、ote controller. ( It is Standby ON/OFF operation.) SOLUTION The software related to Video Convert is improved. 1) Update the CPUs software version to V0401062 2) Please refer to the service manual SR7400 page61 to62 about details of “ 12.UPDATE FIRMWARE ”. As for details, Please see page 2/3 and 3/3

26、 First of all, please check the u-P (IC28) version. It can be confirmed on the “SERVICE MODE”, please refer to the SR7400 Service Manual on page 58 for the procedure. NECESSARY PART Update of the firmware disc *SR7400CDR REMARKS 1) This problem apply to the following service change code. SR7400/N1B

27、apply to MZ00 xxxxxxxxxx SR7400/N1S apply to MZ00 xxxxxxxxxx 2) The following model has improved from the top of mass production. SR7400/K1G SR7400/S1G 3) SR7400/U1B/L1G are NTSC system, this problem does not correspond. 4) This improvement has been done in the production the service change code MZ0

28、2. SERVICE BULLETIN The synchronization of picture is disturbed. ( Only PAL system video signal ) x for information customer complaint in case of service mandatory . See Below V040106 2N File name of *SR7400CDR 61 12. UPDATE FIRMWARE Software for CPU and DSP can be updated. Have *SR7400CDR update di

29、sc. There are two mode of download, regarding to the target of software as bellow. Mode 1: Download DSPs software to 4M Flash-ROM. This mode is to update the software for DSP. The target devise is 4M Flash-ROM (IC20) on CUP11658 (DSP PCB). SR7400 need to be set download condition, by three front key

30、s. Mode 2: Download CPUs software to internal Flash-ROM. This mode is to update the software for DSP. The target devise is internal fl ash ROM of CPU (IC28) on CUP11658 (DSP PCB). The unit needs to be set to writing condition, by pushing internal switch from back-panel. The following items are requi

31、red for updating. RS232C Dsub-9 pin cable (female to female/Straight type) PC (Windows 98, NT, ME, 2000) with RS-232C port. Upgrade software to CPU. Upgrade software to DSP. Use RS232C Dsub-9 pin cable (female to female/Straight type) to connect PC and the unit. COM port on PC needs to be set by dia

32、log box for each program. COM port can be set from COM1 to COM5. Download Firmware for DSP (Mode 1) 1. Put the DSP upgrade folder into anywhere on your PCs hard disc. 2. Connect PC and the unit with the RS-232C cable. 3. Turn on the unit. 4. Press ENTER, MUTE and CD buttons simultaneously more than

33、5 seconds to turn the unit into Loading Mode. 5. LOADING MODE will be shown on FLD. 6. Launch UpgradeDSP.exe on PC. 7. Set the Baud Rate to 38400 then click Start communication button. If the connection is made successfully, a dialog box saying Success to connect appears and CONNECTED is displayed o

34、n FLD. 8. Click Send the DSP codes button on the dialog box. Progress status of downloading will be shown on PC and LOADING is displayed on FLD. 9. If downloading is completed successfully, COMPLETED is displayed on FLD. And a dialog box saying Finished the DSP code transmitting appears. Click OK an

35、d then click CLOSE to close the application. 10. Turn off the unit. Download Firmware for CPU (Mode 2) 1. Put the CPU upgrade folder into anywhere on your PCs hard disc. 2. Connect PC and the unit with the RS-232C cable. Personal notes: 62 3. Insert a thin rot to the hole and push the switch (SW10)

36、inside to turn on the switch. 4. Turn on the power of the unit. (Confi rm that the stand-by LED lights in green so the unit is in the boot mode.) 5. Launch H8Download.exe on PC. 6. Click other fi les. button in the dialog box to specify the fi le (XXXX.mot) to be upload. 7. Click Connect button. If

37、the connection with the H8 -com is successfully made, a dialogue box saying Success to the H8 micro processor connection appears. If the connection fails, error message will appear. 8. Click Send button to start update. 9. If the fi rmware is updated successfully, a dialog box saying Finished the fi

38、 rmware program sending appears. 10. Click CLOSE button to close the application. 11. Disconnect Mains power cord. 12. Turn off the internal switch that has been turned on at step 3. 13. Turn on the unit. Firmware Version Check To check the versions of the fi rmware, see Microprocessor (CPU), DSP Ve

39、rsion and FLD Segment Check Mode in SERVICE PROGRAM section. HOLE Personal notes: Approved by S.NAGAO Written by WQ-19 2 817/additional rule 3 (1st Issue 2003-03-19) Date:15-Mar-2004Model: SR7400 Page:1 / 1REF.NBR:MZ04-024 Circulation:Application: Subject: Int.ref: PHENOMENON 1) Noise occurs except

40、7.1CH INPUT and analog signal S-DIRECT. 2) When volume is increased, noise occurs. SOLUTION 1. Chip Resistor LC76 ( 0 ohm ) is removed on DSP PCB. 2. Cut a GND-pattern on DSP PCB. As for details, Please see page 2/2 REMARKS The countermeasure apply to this claim only 1) This problem apply to the fol

41、lowing serial number or week code. SR7400/U1B apply to MZ020404003450 SR7400/N1B apply to MZ020404000705 SR7400/N1S apply to MZ020404001065 SR7400/S1G apply to MZ020405000120 SR7400/K1G apply to MZ020404xxxxxx 2) The following model has improved from the top of mass production. SR7400/L1G SERVICE BU

42、LLETIN Noise occurs when volume is increased of the non-signal input. x for information customer complaint in case of service mandatory . See Below SERVICE BULLETIN REF. NBR: MZ04-024 Model : SR7400 Page2/2 DSP PCB Remove LC76 / Cut Pattern PROCEDURE 1) Remove 9 screws of VIDEO PCB from REAR PANEL. 2) Remove 2 screws from VIDEO PCB. 3) Disconnect the connector and Flexible Flat Cable from VIDEO PCB. 4) You can remove VIDEO PCB, then you can see LC76. 5) Remove LC76 and Cut a GND-Pattern VIDEO PCB Remove LC76 Cut GND Pattern