Audioaccess-PX600-pre-sm维修电路原理图.pdf

《Audioaccess-PX600-pre-sm维修电路原理图.pdf》由会员分享，可在线阅读，更多相关《Audioaccess-PX600-pre-sm维修电路原理图.pdf（278页珍藏版）》请在收音机爱好者资料库上搜索。

1、 AUDIOACCESS PX-600 MULTI-ROOM PREAM/CONTROLLER PRELIMINARY SERVICE MANUAL Harman Consumer Group 250 Crossways Park Dr. Woodbury, New York 11797 RadioFans.CN 收音机爱 好者资料库FEATURES Six Zone, Multi-Room, Multi-Source Audio System Flagship of the Audioaccess product line, the PX-600 Multi-Room Preamp/Cont

2、roller forms the heart of a powerful multi-room audio system. Together with our time proven wall-mounted keypads and conventional audio source equipment, the PX-600 allows you to access and control five different music sources in six different areas simultaneously. The PX-600 combines a learning IR

3、based source controller with six independent stereo preamps to form a six zone system in one compact package. Multiple PX-600s are easily interconnected to form systems as large as 36 independent zones and the PX-600 can be readily interfaced to both complex home automation and home theater systems.

4、 You can turn zones on or off, select sources, control their basic functions, and change volume independently in each zone, by just the touch of a single button on the KPS keypad. And unlike rotary volume controls, our low profile keypad blends seamlessly with any decor. The PX-600 can also be opera

5、ted from its own optional handheld IR remote control from any zone. Of course, the main zone can always be operated from the PX-600s front panel. Learning to operate the system is simplicity itself. Keypads, remotes, and even the front panel have identical controls and operate in exactly the same wa

6、y. Customized System Operation The PX-600 is configured at the time of installation via a detachable handheld programmer that is available only to authorized dealers, preventing casual tampering with the comprehensive system programming. Programmable features include: turn-on volume, maximum volume,

7、 lockout, bass and treble settings for each zone, group setup, paging setup, and specific IR protocols for tuners, CD players, high-capacity CD changers, tape players and VCRs, as well as special macro commands tailored for control of popular surround processors. Optional modules provide door chime

8、and paging capability and an RS-232 interface for integrating the PX-600 with computer-based home automation systems. The PX-600 is complemented both functionally and aesthetically by a Multi-Room Expander and a Multi-Room Amplifier. This combination forms a solution for all of your multi-room needs

9、. Features Simple, intuitive operation Easy installation and programming External keypad termination board for easy hookup in advance Each zone has independent access to each of five audio inputs plus a paging input Infrared receiver built into each keypad Main zone rear panel IR input, compatible w

10、ith standard IR repeaters Four-conductor wiring to keypads (two twisted pairs: telephone or data cable) External fuse protects keypad (mis) wiring Main zone operable via front panel in addition to keypad Keypads control basic functions of audio sources via learned infrared commands External plug-in

11、programmer (required for setup) Each zone assignable to one of three ALL ON groups (or none) Zone setup and infrared commands are stored in non-volatile memory Compatible with the Audioaccess six-zone, stereo, multi-room amplifier Compatible with the Audioaccess multi-room expander Expandable to 36

12、zones Paging and doorbell features available with optional Page/Doorbell Module RS-232 Interface Module available Compatible with other popular home automation and control systems Special grounding, filtering and intelligent circuit design for superior protection IR outputs compatible with industry

13、standard systems Trigger outputs designed to drive relays for each zone System trigger output active whenever any zone is on IR loopthru output RadioFans.CN 收音机爱 好者资料库Specifications PX-600 Multi-Room Controller Audio Section Inputs: Five stereo source inputs, 1 mono page input, each with loopthru ca

14、pability Input impedance: 10k ohms Maximum input voltage: 3.5 Vrms Outputs: Six stereo preamp outputs with independent volume, bass and treble Six stereo zone outputs (fix level post input selector) Tape output from the main zone (zone 6) Source Equipment Control and Interface Inputs: Trigger input

15、to facilitate sharing source equipment (controls switched outlet and stop commands) Keypad interface connector DC voltage input for zone trigger outputs Hardwired IR input to control main zone from industry standard IR receivers Outputs: Trigger output from each zone to control external relays One s

16、ystem trigger output to control external relay (active when system is on) Six infrared emitter jacks, one for each audio source (5) plus ALL IR loopthru output Switched AC outlet (North American model only) Controls: Front panel controls zone 6 (controls: power, source selectors, volume, mute, and A

17、ll Off) Independent source selection: Tuner, CD, Tape, Aux, Video, etc. Control of basic source functions (i.e. play, skip track, skip disc, skip preset, fast forward, etc.) Independent volume control per zone Independent On/Off per zone Programmable All On features Specifications Preamp Outputs Zon

18、e Outputs Frequency Response 10-84kHz, +0, -1 dB 10-95kHz, +0, -1 dB S/N (ref: 1kHz, 1 Vrms, Filter at 22kHz, Volume at unity gain 99 dBV dBV THD+Noise ( 1kHz, Filter at 80kHz, Volume set at unity gain 0.008% (500mV input signal) 0.004% (1Vinput signal) Maximum Output Level 3.5 Vrms 3.5 Vrms Output

19、Impedance 470 ohms 470 ohms Left/Right Crosstalk (1kHz, each input) -85 dB -85 dB Input to Input Crosstalk ( 1kHz, any two inputs -100 dB -100 dB Zone to Zone Crosstalk ( 1kHz, any two zones -100 dB -100 dB Maximum Gain 20 dB Unity Volume Control 80 dB in 2 dB steps N/A Bass (Shelving type, 100 Hz)

20、+15, -12 dB (3 dB steps) N/A Treble (Shelving type, 10kHz) +12, -12 dB (3 dB steps) N/A Signal Connector Type RCA with short hot pin (makes shield connection first) Power Requirements: 115 volts AC, 50Hz, 40 watts (not including equipment connected to switched outlet) Dimensions/Weight: 17-3/8 W x 4

21、 H x 15 D (442mm x 102mm x 381mm) (with connectors & feet) 12.2 lb (5.5 kg) PXPX- -600600Field RepairField RepairLOCK UPS or SLOW OPERATIONLOCK UPS or SLOW OPERATION?Incorrect Wiring ?IR Interference?Keypad Termination SwitchKEYPAD INSTALLATIONKEYPAD INSTALLATION?Make Tight Connections?Insure Power,

22、 Ground, and Data wires are in Correct Order?Provide Strain Relief On KPT?Keep On hand Extra KPT Blocks?Do Not “Insert” Insulation Into Connector?Install Keypad with Termination Switch in “UP” Position (off)KEYPAD REPAIRSKEYPAD REPAIRS?Replace RS 485 Driver?Replace Keypad Processor BoardReplacing Pr

23、ocessor BoardReplacing Processor BoardAudioaccess MCIAudioaccess MCIMCI Multi-room Computer InterfaceRS-232 to RS-485 TranslatorPXPX- -600 Field Repairs600 Field Repairs?Unit Contains 3 SectionsAudio PreamplifiersCPUPower Supply?Field Repairs May be Performed to Power Supply and CPU Audio Signal Aud

24、io Signal Path Path CPUCPU PowerPowerSupply Supply Audio Signal Audio Signal Path Path CPUCPUPowerPowerSupplySupplyControl SectionControl SectionKeypad FuseKeypad FusePower SupplyPower SupplyMain Power FuseMain Power FuseInternal FuseInternal FusePOWER SUPPLY FIXESPOWER SUPPLY FIXES?NO POWER Replace

25、 Mains Fuse - 5 X 20 mm 2A Slow Blow Replace Internal Fuse - F1301 - 5 X 20 mm 500 ma Slow BlowMain Power IssuesMain Power Issues?Check Power Load on Convenience Outlet Do not power amps directly with PX-600 Do not Exceed 200 Watts on PX-600 outlet?AC Line condition +- 10% rated Voltage?Use Un-switc

26、hed Outlets for ALL Audioaccess Components?PX-600 Powers UP but Cycles Power on and OFF?Unit Hard Power UpUnit Hard Power UpAUDIOACCESSPX-600VERSION 2.04-ANY- KEY-TO-EXIT- “ALL OFF ” LED on PX 600 Cycling On and OffReplacing RSReplacing RS- -485 Driver485 DriverRS485RSRS- -485 Driver485 DriverTVS Bu

27、s ProtectorsTVS Bus ProtectorsPXPX- -600 Internal Sections600 Internal SectionsAudio Signal Audio Signal Path Path CPUCPUPowerPowerSupplySupplyMicroprocessorUNIT CYCLES ON AND OFFUNIT CYCLES ON AND OFF?REPLACE RS-485 Driver?Replace MicroprocessorEPROMSRAMMicroprocessorRSRS- -485 or SRAM Problems485

28、or SRAM ProblemsAUDIOACCESSPX-600VERSION 2.04-ANY- KEY-TO-EXIT-SOURCE EQUIPMENTNOW LOADING.Control Problem DescriptionsControl Problem Descriptions?Keypads Initialize but appear “dead”?Intermittent Control or “Lock UP”?No IR OutputControl RepairsControl Repairs?Disconnect Keypad Bus and Check Unit F

29、rom Front Panel ?Check Keypad Fuse?Data Reset?Replace RS 485?Replace SRAM?Replace EPROM?Replace Microprocessor PX-600 SCHEMATICS CONTENTS MAIN BOARD REV B0 MAIN BOARD REV B1 MAIN BOARD REV C0 MAIN BOARD REV C1 MAIN BOARD REV D0 MAIN BOARD REV D1 MAIN BOARD REV D2 FRONT PANEL REV C0 PROGRAMMER REV B0

30、 PX-600 Field RepairGuideVersion xxxx Rev Level xxx PX-600 FIELD REPAIR FLOW CHARTINITIAL SYSTEM POWER-UPPX-600FRK Power Up FlowPage 1of 1PX-600 FIELD REPAIR FLOW CHARTKPS BUS OPERATIONSPX-600FRK KPS Bus FlowPage 1of 1 PX-600 FIELD REPAIR TROUBLE SHOOTINGOCTOBER 8, 2003 # XXXXXX PX-600 Field Repair

31、Trouble Shooting.doc Page 4 PX-600 REPAIR PARTS LOCATIONS RS485 DriverU1106SRAMU804Power FuseF1301EPROMU803MicroprocessorU801Front of PX-600 Madrigal Audio Laboratories P.O. Box 781 AUDIOACCESS TECHNICAL SERVICES Middletown, CT 06457-0781 (860) 346-0896 FAX (860) 347-6251 PX-600FRK PX-600 FIELD REPA

32、IR KIT SEPTEMBER 22, 1999 The Audioaccess Field Repair Kit has been developed for authorized Audioaccess installation companies to improve servicing time and overall customer satisfaction of PX-600 systems. Field repair eliminates system downtime and the cost of multiple trips to job sites to reinst

33、all keypads and controllers. This kit contains socket parts and subassemblies to perform simple repairs to Audioaccess KPS keypads and PX-600 controllers. We recommend that dealers bring this kit on all Audioaccess installation and/or troubleshooting visits. The following parts and quantities are in

34、cluded in each kit. Dealer costs are also included for reordering individual components: DESCRIPTION Part NO. LOCATION Qty DLR EACHDLR EXT PX-600/KPS PARTS Ribbon Cable for Programmer 705-1000-800 PX-600 PROG 1 $10.50 $10.50 Fuse 2 Slo Blo 664-2101-200 MAINS FUSE 6 $0.93 $5.58 Fuse 1.5 5 X 20 mm 664

35、-1001-500 KEYPAD (NEW) 6 $1.47 $8.82 Fuse 1.6 Slo Blo 380-00160-00 KEYPAD 6 $0.78 $4.68 Fuse 500ma Slo Blo 380-00050-00 F 1301 (INTERNAL) 6 $0.69 $4.14 LTC485 Bus Driver 605-0485-008 U 1106 12 $3.45 $41.40 Keypad Processor Board 450-9862-100 KPS 4 $38.82 $155.28 Volume Control assy 926-0600-002-00 F

36、RONT PANEL 1 $60.50 $60.50 Microprocessor 606-8055-000 U 801 1 $26.82 $26.82 SRAM 606-1244-000 U 804 2 $31.95 $63.90 V2.04 610-1204-000 U 803 2 $20.00 $40.00 Total Cost if purchased separately. $426.62 Total Kit Price PX600FRK $245.00 Please contact Audioaccess Technical Support at 888-691-4171 or 8

37、60-346-0896 from the job site when a specific Audioaccess system malfunction occurs. Audioaccess will assist the installer in system diagnostics and possible on-site repair. Below is a brief description of usage for some of the parts listed above. 1. LTC 485 Bus Driver This eight-pin IC sends and re

38、ceives communication data on the RS-485 keypad bus. This device is located in each KPS keypad, PX-600, PX-603, and MRX-NT. The RS-485 transceiver is socket mounted in KPS keypads manufactured after April 1, 1998 and in the PX-600 dating from 1995. 2. SRAM This component provides the non-volatile mem

39、ory in the PX-600. The SRAM “holds” all programmed settings in a system. This is the second part to suspect after replacement of the LTC 485 driver for any functional or source control related failure. 3. EPROM This is the operating software for the PX-600. Version 2.04 is the current software versi

40、on. 4. Microprocessor The main “brain” of the system. This part may need replacement if RS-485, EPROM and SRAM replacements result in continued system control errors. 5. Keypad Processor Board A failed keypad may require the replacement of the entire keypad processor board. Replacement of this board

41、 will result in the successful repair of 99% of remaining keypad related problems. Note - KPS keypads mis-installed or damaged by EMI (Electro-Magnetic Interference) are not covered under the Audioaccess warranty. 6. Volume Control Assembly This volume control pot on the PX-600 and MRX controls the

42、volume of Zone 6 in these systems. A broken volume assembly will cause the system to “lock up” when zone 6 is “turned on” inhibiting volume and source control in an entire system. PX-600 Field Repair Kit.doc Doc # AA92299 Audioaccess 250 Crossways Park Drive Woodbury, NY 11797 (888) 691-4171 FAX (51

43、6) 682-3528 TECHNICAL SERVICESINFORMATION SHEET PX 600 ALL IR Output / MRX Blaster IR Output DECEMBER 8, 1999 (ORIGNINALLY TECHNICAL MEMO 9711) Page 1 of 1 PX-600 All IR Output.doc Page 1 DOC# AA092603 WB-TS / FB-CR OVERVIEW The “All” and “Blaster” IR Output ports the on the PX-600 and MRX-NT may be

44、 used as an alternative or in conjunction with the individual source IR control ports (ie: CD Tape AUX and Video) to control source components in an Audioaccess system. As suggested by its name, these “all” output ports route all of the IR codes that are learned by the PX 600 and MRX-NT. The dedicat

45、ed IR outputs route only IR for a specific source. Output voltages may be adjusted on both the PX-600 and MRX-NT for blaster or emitter settings. The following are some suggestions of how these “ALL” outputs are used. CONFIGURATION OF THE ALL IR OUTPUT PX-600 - The All Output is factory configured f

46、or standard low power emitters but can be changed to drive a blaster style emitter. To make this change, remove the top cover, and move the header jumper located on the main board at P120, one position back towards the rear panel. The two positions are labeled Blaster and Emitter. MRX-NT - The ALL o

47、utput of the MRX-NT is factory set for using high power blaster emitters. Functionally, the IR output is identical to that of the PX-600. To modify this to a standard low power emitter port you must modify the emitter being used. Using the positive supply wire, place a one 1K Ohm 1/4w 5% resistor in

48、 series with the LED. This will cause a voltage drop across the resistor and will avoid damaging the emitters LED. USING THE ALL IR OUTPUT Application 1 If using source components from a single manufacturer that contain control in/out ports, you may use only the “ALL” out (emitter setting) and daisy

49、 chain the control signal to each of the source components. This method eliminates the emitters on the front panel of the source gear and is easy to install. The source gear must be opto-isolated. Opto-isolation indicates that the source component internally strips the IR carrier from the control si

50、gnal. If this is not the case, you may use the Xantech 794 and 797 series of interface modules for direct connection between the PX-600 IR out and the source components control inputs. Using the “ALL” output is not desirable if you wish to control two identical source components that use the same IR