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MODELS: 

Logical character search strings using AND/OR/NOT operators with "asterisk" and "question mark" wildcards, or list ALL models explicitly.

 

Priority 1: 

Immediate and unconditional; current production halted until new parts or procedures available.  All finished units retrofitted.

   

Priority 2: 

All units in production (i.e. all unfinished units) will use new parts or procedures as soon as they become available.

 

Priority 3: 

New parts or procedures will be used as soon as they become available AND as soon as existing parts are depleted or declared dead stock.

 

Priority 4: 

Alternate parts MAY be used as demand requires.

 

SAFETY STANDARDS EVALUATIONS:  

All changes must be assessed to determine their possible impact on Safety Standards approvals and the need to either resubmit 

specific documentation, or the entire unit, for updated certification. If it is determined that Safety Standards approvals may be affected, then 

a Safety Standards Approval 

Report

 must be attached to this ECO detailing steps taken to update necessary approvals. 

ECO12.dot     WRP    25 JULY 2003

 

ENGINEERING CHANGE ORDER #735 

MODELS 

AFFECTED: 

PP300* 

 

SUBJECT:

  

COMPONENT CHANGES on AFSS-R12 (AC filter & Soft-Start

 

board)  

Revised shield IN-AFSS10-R12 

 

DETAILED DESCRIPTION of, and REASONS for, CHANGE

                                                                                                    

 

Diode 

DZ404

, currently a 

1N4733 

(5V1/1W),  can be replaced with 

1N5231

 

(5V1/500mW) on the AFSS-R12 board if its leads are too large for the present holes. 

Future revisions of this board will feature larger holes to accommodate the 1N4733’s 
heavier leads

The 

IN-AFSS-10 

insulator shield, installed behind AFSS-r12 board, is replaced with the 

IN-AFSS-12

 and is now made from 

Formex GK17

 polypropylene to meet safety 

standards requirements. 

Updated model BOM is PP300-M2 

 

ISSUE DATE 

ENGINEER(s) 

PRIORITY  STARTING SERIAL No. 

2004-02-17 F.N. 

P300-000065 

 

 

 

 

 

 

 

 

 

 

         (SEE NOTE BELOW) 

 

DOCUMENTS : 

DOCUMENT NAME 

DOCUMENT DESCRIPTION 

ENGR(s) 

STATUS 

AFSS12.DWG

          (Page 2) 

 

ASSEMBLY INSTRUCTION FOR AC FILTER & 
SOFT START BOARD 
 

F.N. COMPLETE 

INAFSS12.DWG

     (Page 3) 

DRAWING FOR INSULATOR BEHIND OF THE AC 
FILTER & SOFT  START BOARD 

F.N. COMPLETE 

 

 

 

 

 

 

 

 

 

 

ENGINEERING 

PURCHASING 

PRODUCTION 

APPROVAL 

 

 

 

MANAGER’S 

COMMENTS 

 
 
 
 

 

 

 

ECO IMPACT REPORT 

PURCHASING PRODUCTION

 

Have ALL affected BOMs been updated?    

Comments:  

Describe any issues relating to the implementation of this ECO:

 

 

IS A 

SAFETY STANDARDS

  RE-

EVALUATION REQUIRED (Y/N)? 

Summary of Contents for PowerPac 120

Page 1: ...BRYSTON OWNER SMANUAL MonauralAmplifiers PowerPac60 120 300 InstructionsForBryston Last change on 31 oct 2003 ...

Page 2: ...nd some air flow is desirable Make sure the power switch on the front panel of the amplifier is in the off out position Plug the power cord into the front panel of the amplifier then insert the male end into the wall outlet All Bryston amplifiers contain high quality dedicated circuitry in the power sup plies to reject RF line spikes and other power line problems Bryston power amplifiers do not re...

Page 3: ...nnec tors also be used on the speaker cables All Bryston amplifiers will accept bal anced or single ended RCA input connec tors The balanced inputs use combination 3 pin XLR pin 1 ground pin 2 and 1 4 inch tip ring and sleeve ground input connectors A ground lift switch is located on the front panel of the amplifier It is connected between the chassis ground including the third prong on the power ...

Page 4: ......

Page 5: ... seconds follow ing application of the 12 Volts In this way groups of amplifiers may be sequenced on to distribute power surges over a period of time The power switch must be left in the off position at all times for the PP120 amplifier to operate in the re mote mode The PP300 has a 3 position switch al lowing for Local on or Off or REM remote power selection The amplifier will remain powered up w...

Page 6: ...CT SUPPLY CORD BEFORE REPLACING FUSE ATTENTION DEBRANCHER AVANT DE REMPLACER LE FUSIBLE CAUTION DISCONNECT SUPPLY CORD BEFORE REPLACING FUSE ATTENTION DEBRANCHER AVANT DE REMPLACER LE FUSIBLE FUSE 120W 8 120W 8 S 6dB BAL REG INPUT SW INPUT SW UNBAL BAL _ 2 _ 3 G 1 G _ MONAURAL AMPLIFIER MONAURAL AMPLIFIER PUSH ...

Page 7: ... AMPLIFIER MONAURAL AMPLIFIER REM LOCAL PUSH POWER SW POWER SW 0V OFF 0V OFF 12V ON 12V ON AC DC AC DC CAUTION DISCONNECT SUPPLY CORD BEFORE REPLACING FUSE ATTENTION DEBRANCHER AVANT DE REMPLACER LE FUSIBLE CAUTION DISCONNECT SUPPLY CORD BEFORE REPLACING FUSE ATTENTION DEBRANCHER AVANT DE REMPLACER LE FUSIBLE FUSE ...

Page 8: ...s into 8 ohms 100 watts at 8 ohms 60 watts at 8 Ohms Input Impedance 50K ohms unbalanced 20K ohms balanced Heatsinking Over 3320 cm square Over 1690 cm square Over 600 cm square Features Regulated power supplies to all voltage gain stages Gold plated input and output connectors Switchable balanced XLR 1 4 w two different gains and RCA unbalanced inputs only for PP300 PP120 Remote power turn on 12V...

Page 9: ...omponent part was caused by damage not resulting from a defect or malfunction or abuse while in the possession of the customer tampering by persons other than factory authorized service personnel or failure to comply with Bryston operating instructions This warranty gives you specific legal rights and you may also have other rights which may vary from province to province and country to country BR...

Page 10: ...03 ENGINEERING CHANGE ORDER 735 MODELS AFFECTED PP300 SUBJECT COMPONENT CHANGES on AFSS R12 AC filter Soft Start board Revised shield IN AFSS10 R12 DETAILED DESCRIPTION of and REASONS for CHANGE Diode DZ404 currently a 1N4733 5V1 1W can be replaced with 1N5231 5V1 500mW on the AFSS R12 board if its leads are too large for the present holes Future revisions of this board will feature larger holes t...

Page 11: ...004 ENGINEERING CHANGE ORDER 751 MODELS AFFECTED POWERPAC 300 SUBJECT MODIFYING REMOTE BOARD AND USING A NEW STANDOFF ISSUE DATE ENGINEER s PRIORITY STARTING SERIAL No 30 Apr 04 FN 1 DETAILED DESCRIPTION of and REASONS for CHANGE DUE TO MECHANICAL PROBLEM IN ORDER TO HOLD REMOTE BOARD TO INLET BOARD COMPLETELY TIGHT WE NEED TO MODIFY REMOTE BOARD BY DRILLING OUT A HOLE FOR SCREW 4 AND CUT ON THE B...

Page 12: ... ENGINEER s PRIORITY STARTING SERIAL No 2004 08 26 FN 1 PP300 000091 n DETAILED DESCRIPTION of and REASONS for CHANGE Due to a report of an open circuit in two re setable fuses RXE 010 on an Output Devices Board causing high DC offset and subsequent speaker damage these parts are being removed and replaced as described below 1 On Output devices board CBP300 OD 1 0 remove two re set able fuses F2 F...

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