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1 Mechanism Overview (BRS1D) ------------------------------ 2
Unit ------------------------------------------------------------ 2
1.2. Traverse Motor --------------------------------------------- 3
2 Warning -------------------------------------------------------------- 4
2.2. Precaution of Laser Diode------------------------------- 5
3 Mechanism Operation ------------------------------------------ 9
3.1. Close/Open Operation ----------------------------------- 9
3.2. Open/Close Operation ----------------------------------10
3.3. Initialization------------------------------------------------- 11
3.4. Fail Safe Mode --------------------------------------------13
4.1. Flow Chart--------------------------------------------------15
4.2. Disassembling Procedures-----------------------------16
Model No.
4.3. Assembly Procedure ------------------------------------ 21
5 Reliability ---------------------------------------------------------- 30
5.1. Diagram of Reliability P.C.B. -------------------------- 30
5.2. FUNCTIONS Description ------------------------------ 31
5.3. AGING MODE Description ---------------------------- 31
5.4. Setup Connection ---------------------------------------- 32
5.5. Jig's Flow Diagram -------------------------------------- 34
5.6. P.C.B. Checking ------------------------------------------ 38
Parts List --------------------------------------------------- 39
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Mechanism Unit


Table of Contents

Summary of Contents for Panasonic BRS1D

  • Page 1: Table Of Contents

    BRS1D Model No. TABLE OF CONTENTS PAGE PAGE 1 Mechanism Overview (BRS1D) ------------------------------ 2 4.3. Assembly Procedure ------------------------------------ 21 1.1. Mecha Chassis Assembly / Tray / Traverse 5 Reliability ---------------------------------------------------------- 30 Unit ------------------------------------------------------------ 2 5.1. Diagram of Reliability P.C.B. -------------------------- 30 1.2.
  • Page 2: Mechanism Overview (Brs1D)

    1 Mechanism Overview (BRS1D) BRS1 mechanism is a single tray mechanism used for CD/DVD models. 1.1. Mecha Chassis Assembly / Tray / Traverse Unit...
  • Page 3: Traverse Motor

    1.2. Traverse Motor...
  • Page 4: Warning

    2 Warning 2.1. Prevention of Electro Static Discharge (ESD) to Electrostatically Sensi- tive (ES) Devices Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Elec- trostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor “chip”...
  • Page 5: Precaution Of Laser Diode

    2.2. Precaution of Laser Diode CAUTION! THIS PRODUCT UTILIZES A LASER. USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE. Caution: This product utilizes a laser diode with the unit turned "on", invisible laser radiation is emitted from the pickup lens. Wavelength: 655 nm (DVD)/790 nm (CD) Maximum output radiation power from pickup: 100 μW/VDE Laser radiation from the pickup unit is safety level, but be sure the followings:...
  • Page 6: Service Caution Based On Legal Restrictions

    2.3. Service caution based on Legal restrictions 2.3.1. General description about Lead Free Solder (PbF) The lead free solder has been used in the mounting process of all electrical components on the printed circuit boards used for this equipment in considering the globally environmental conservation. The normal solder is the alloy of tin (Sn) and lead (Pb).
  • Page 7: Handling Precaution For Traverse Unit

    2.4. Handling Precaution for Traverse Unit The laser diode in the optical pickup unit may break down due to static electricity of clothes or human body. Special care must be taken avoid caution to electrostatic breakdown when servicing and handling the laser diode in the traverse unit. Cautions to Be Taken in Handling the Optical Pickup Unit 2.4.1.
  • Page 8 Grounding for electrostatic breakdown prevention 2.4.2. Some devices such as the CD player use the optical pickup (laser diode) and the optical pickup will be damaged by static electricity in the working environment. Proceed servicing works under the working environment where grounding works is completed.
  • Page 9: Mechanism Operation

    3 Mechanism Operation 3.1. Close/Open Operation Close Open T.S.P. Tra y state SW ON SW ON stopper stopper 129.2 126.9 Tray TT center Tray Rack engage T.S.P. Rack engage TRV Slide Plate 49.9 51.6 TT center 33.4 31.9 R8.45 31.1 41.7 30.1 38.6...
  • Page 10: Open/Close Operation

    3.2. Open/Close Operation Open Close Tra y T.S.P. state SW ON SW ON stopper stopper 129.2 126.9 Tray TT center Tray Rack engage T.S.P. Rack engage 51.6 TRV Slide Plate 49.9 38.6 33.8 41.7 TT center R8.45 31.9 30.1 31.1 7.71 TRV Base Front boss...
  • Page 11: Initialization

    3.3. Initialization During the power-up of main unit (using BRS1D mechanism), the state of switches is sensored by the micro-p IC and the traverse motor is adjusted accordingly. Note : Refer to Table 1 for the initialization process. Condition for Initialization Processing:...
  • Page 12 3.3.2. When there is Initialization Initialization Processing TRV-MOTOR INNER-SW = L ? TRV-MOTOR INNER-SW = H ? TRV-MOTOR INNER-SW = L ? TRV-MOTOR Brake EXIT...
  • Page 13: Fail Safe Mode

    3.4. Fail Safe Mode * Fail safe is a function for recovery of tray movement if mechanism cannot carry out tray open or close within a specified time. Below are the fail safe specification at each position. Refer to table 2. Fail Safe specification state Close position...
  • Page 14: Disassembly And Assembly Instructions

    4 Disassembly and Assembly Instructions Caution Note: • This section describes the disassembly and/or assembly procedures for all major printed circuit boards & main compo- nents for the unit. (You may refer to the section of “Main components and P.C.B Locations” as described in the service manual) •...
  • Page 15: Flow Chart

    4.1. Flow Chart 4.1.1. Disassembly flow chart Below describes the disassembly flow for the mechanism. 4.1.2. Assembly flow chart Below describes the assembly flow for the mechanism.
  • Page 16: Disassembling Procedures

    4.2. Disassembling Procedures Step 3 : Release the catches & remove the tray. Caution : Refer to 2.4 “Handling Precaution for Traverse Unit” to prevent static damage to the Optical Pickup unit 4.2.1. Replacement of Tray Step 1 : Use a pin to Slide the Traverse Slide Plate until it come to a stop.
  • Page 17 4.2.2. Replacement of Traverse Unit Step 2 : Release the 24P FFC from the slot. • Refer to “Replacement of Tray” Note : 1. When the optical pickup unit is defective, the overall traverse unit needs replacement. 2. Please note that appropriate actions need to be taken to prevent static damage.
  • Page 18 Caution : Avoid touching the surface of the Optical Pickup 4.2.3. Replacement Traverse Slide Unit. Plate • Refer to “Replacement of Tray” • Refer to “Replacement of Traverse Unit” Step 1 : Pull forward catches as shown to release Traverse Slide Plate.
  • Page 19 4.2.4. Replacement of Belt, Pulley Gear & Step 3 : Remove the Pulley Gear as shown. Driver Gear • Refer to “Replacement of Tray” • Refer to “Replacement of Traverse Unit” • Refer to “Replacement of Traverse Slide Plate” • Disassembly of Belt Step 1 : Remove the Belt as shown.
  • Page 20 4.2.5. Replacement of Loading P.C.B. Step 4 : Release the FFC from the slot. • Refer to “Replacement of Tray” • Refer to “Replacement of Traverse Unit” • Refer to “Replacement of Traverse Slide Plate” • Refer to “Disassembly of Belt” Step 1 : Desolder pins of the Wires (+) &...
  • Page 21: Assembly Procedure

    4.2.6. Replacement of Loading Motor 4.3. Assembly Procedure • Refer to “Replacement of Tray” 4.3.1. Assembling of Loading Motor • Refer to “Replacement of Traverse Unit” • Refer to “Replacement of Traverse Slide Plate” Step 1 : Insert the Loading Motor as shown. •...
  • Page 22 Step 2 : Press the Loading motor as shown ensure a “click” 4.3.2. Assembling of Loading P.C.B. sound is heard when the Loading Motor is fully catched. Step 1 : Insert the FFC through the hole of Mecha Chassis. Step 3 : Solder pins of the Wires (+) & (-) on the solder side of Loading P.C.B..
  • Page 23 Step 4 : Solder pins of the Wires (+) & (-) on the solder side of Step 7 : Dressed the wire in the slot. Loading P.C.B.. Step 5 : Dressed the wire as shown. Step 6 : Fix 1 screw.
  • Page 24 4.3.3. Assembling of Driver Gear, Pulley Step 3 : Install Belt. Gear & Belt Step 1 : Install the Driver Gear into the guide as shown. Step 2 : Install the Pulley Gear into the slot as shown, press down until hear a “click” sound is heard.
  • Page 25 4.3.4. Assembling of Traverse Slide Plate Step 3 : Press the Traverse Slide Plate and make sure it is fully catched onto the Mecha Chassis. Step 1 : Place the Traverse Slide Plate into the Mecha Chassis as shown. Step 2 : Slide the Traverse Slide Plate to the end as shown & flip over the Mecha Chassis.
  • Page 26 4.3.5. Assembling of Traverse Unit Step 2 : Slot the Traverse unit at approximately 45° into the mecha chassis as arrow shown. Step 1 : Release the guide as shown & slide the Traverse Slide Plate to the end.
  • Page 27 Step 3 : Ensure the Traverse Unit seated properly onto the Step 5 : Slot the FFC onto the slot. Groove. Caution : Ensure that the FFC are properly inserted into the slots as shown. Step 4 : Slide Traverse Slide Plate to lock the Traverse Unit as shown.
  • Page 28 4.3.6. Assembling of Tray Step 2 : Slot the Tray into the guides as Picture shown. Step 1 : Slide the Traverse Slide Plate unit it stop at the Guide. Step 3 : Ensure the guides is align with the groove when sliding the tray in.
  • Page 29 Step 4 : Slide the tray in fully.
  • Page 30: Reliability

    5 Reliability Purpose: To test the BRS1 mechanism unit operation by using the Reliability P.C.B. before installation into the main unit. 5.1. Diagram of Reliability P.C.B.
  • Page 31: Functions Description

    5.2. FUNCTIONS Description Function Name Function Description Tray - Open When press [LD_OPEN], LD Motor drive until detect LOAD-SW = LO Tray - Close When press [LD_CLOSE], LD Motor drive until detect LOAD-SW = LC Trv - Forward When press [TRV FW], Trv Motor drive until detect INNER-SW = L Trv - Reverse When press [TRV REV], Trv Motor drive until detect OUTER-SW = L LD-Motor -FW...
  • Page 32: Setup Connection

    5.4. Setup Connection Below diagram shows the set-up necessary to carry out the reliability of mechanism...
  • Page 33 5.4.1. Location of Outer-Switch • Refer following for the suggested location for the mounting of the outer-switch (Part No. K0L1BA000158)
  • Page 34: Jig's Flow Diagram

    5.5. Jig’s Flow Diagram Button Operation Mecha Switch state mode INNER OUTER LD_Open [Normal Operation] LD motor turns CW and Open position stop when LOAD-SW = Signal change from LC-->LO LD_Close [Normal Operation] LD motor turns CCW and Close Position stop when LOAD-SW = Signal change from LO-->LC Trv FW [Normal Operation]...
  • Page 35 5.5.1. Normal Operation, Manual, Initialization Normal Operation , Manual , Initialization Tact-Sw=H-->LO Tact-Sw=H-->LC Press [LD Open] Press [LD Close] LD-MOTOR LD-MOTOR LOAD-SW LOAD-SW = LO ? = LC ? EXIT EXIT Tact-Sw=H-->L Press [Trv FW] Tact-Sw=H-->L Press [Trv Rev] TRV-MOTOR INNER-SW TRV-MOTOR = H ?
  • Page 36 5.5.2. Aging Press [Combi] Tact-Sw=H-->L Press [Load] Tact-Sw=H-->L LD-MOTOR LD-MOTOR LOAD-SW LOAD-SW = LO? = LO ? LD-MOTOR LD-MOTOR LOAD-SW LOAD-SW = LC ? = LC ? COUNTER TRV-MOTOR CNT=CNT+1 Tact-Sw=H-->L Press [Trv] OUTER-SW = L ? TRV-MOTOR OUTER-SW TRV-MOTOR = L ? TRV-MOTOR INNER-SW...
  • Page 37 Tact-Sw Tact-Sw Press [LD-FW] Press [LD-Rev] =H-->L (long press) =H-->L (long press) LD-MOTOR LD-MOTOR Release [FW] Release [Rev] key? key? OUTER-SW LOAD-SW = L ? = LO ? EXIT EXIT Press [RESET] Tact-Sw=H-->L Refer next page of spec. for initialization process.
  • Page 38: Checking

    5.6. P.C.B. Checking 5.6.1. Traverse P.C.B. Checking 5.6.2. Loading P.C.B. Checking...
  • Page 39: Exploded View And Replacement Parts List

  • Page 41 6.1.2. Mechanical Replacement Parts List Safety Ref. No. Part No. Part Name & Qty Remarks Description BRS1 MECHANISM RDG0650 DRIVE GEAR RDG0651 PULLEY GEAR RMM0304 TRAVERSE SLIDE PLATE RXQ1949 LOADING MOTOR ASS’Y VMG1720 BELT RXQ1899 TRAY ASS’Y RFKJMCD5601A MECHA CHASSIS ASS’Y RFKB4676A LOADING P.C.B.

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