lexicon mpxg2_repair_procedure电路图.pdf

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1、3 Oak Park Bedford, MA 01730 Tel (781) 280-0300, Fax (781) 280-0499 email: MPX G2 REPAIR PROCEDURE MPXG2 Repair Procedure, created: 9/14/98; REV 1 July 16, 2001 1 The purpose of this document is to assist authorized Lexicon Service technicians in repairing and updating returned units to current manu

2、facturing standards. This and its associated procedures are the factory repair standard and are recommended to authorized distributor service centers. This procedure is to be used in conjunction the product service manual, technical bulletins and with standard performance verification, troubleshooti

3、ng and QC procedures. Some of the information contained herein may be proprietary in nature and should be treated by Lexicon and its representatives as such. Part 1. Mandatory repairs ALL RETURNS 1.Confirm complaint(s) and repair (see troubleshooting notes, Part 3). 2.Clean jacks as needed. Trichlor

4、ethene cleaner will damage plastic parts - do not use to clean flux from or near plastic components. 3.Perform a complete visual inspection of all cable connections, solder joints and seating of socketed components and correct any problems found. 4.Clean the unit inside and out. (This should be a fi

5、nal QC step) 5. Update returned BETA units (26): DW980901-00 allowed shipment of serial nos: 1000-1025 with BETA software and no User Guide. Install released software and add User Guide. 6. For units returned that do not have RTV applied to battery leads apply silicone RTV to the leads to provide be

6、tter mechanical stability. UPDATE: ECO 000814-00 Part 2. Optional repairs AS NEEDED 1. ECO980903-00/00-A P/N 680-12873 CABLE,COAX,.100,SCKTX2,2C,10” Rev0 rework all returned units to add a drop of RTV to each end at the cable connections J2 (Input bd) and J21 (main bd). This remedy has been implemen

7、ted in manufacturing starting with serial number: Lxxxx-1295. Additional units with this remedy implemented are: 1239, 1294, 1232, 1214, 1206, 1200, 1279, 1235, 1203, 1284, 1240 (Europe, 230volt units). P/N 680-12873 CABLE,COAX,.100,SCKTX2,2C,10” Rev1, longer cable, due Mid-December for production w

8、ill eliminate need for RTV; SN Start: TBD - MFG to track serial number and report to service. 2. MOVED TO MANDATORY REPAIRS: For units returned with broken battery leads: when replacing the battery, apply silicone RTV to the leads to provide better mechanical stability. Notify Customer Service Mange

9、r and MFG Eng. if trend of these returns seems to increase. 8/99-five units to date observed. 3. ECO 010621-00 To ensure proper termination of connectors on P/N 680-12873 at J3 on FP input board and J4 on Pot board, after female side is properly installed and fit, apply RTV, Loctite # 5140 to the ma

10、le side of the connector. This should only be required with cables manufactured by Lin Po RadioFans.CN 收音机爱 好者资料库 MPX G2 REPAIR PROCEDURE MPXG2 Repair Procedure, created: 9/14/98; REV 1 July 16, 2001 2 Part 3. Troubleshooting notes 1. REF: ECO 000121-01 If there is a complaint of hum in the audio, c

11、heck the length of P/N 680-12872 coax cable to insure that the maximum length of unshielded from the jacket of the cable to the connector on each end is .5. Part 4. Additional Engineering change orders (relevant to service/repair); see master shopfloor files for complete listing RadioFans.CN 收音机爱 好者资料库