1

1) Focus Error Signal > (A+C)-(B+D) This signal is generated in RF IC (IC121 AN22113A) and controls the pick-up's up and down to focus on Disc. 2) Tracking Error Signal (DPP Method) > (A+D)-(B+C) - k x (EF1+EF4mEF2+EF3) This signal is generated in RF IC (IC121 AN22113A) and controls the pick-up's left and right shift to find to track on Disc. This signal is converted to DATA signal in DSP IC (IC201 MN103SA6G).

Disassembly

Release 4 screws A and remove the Bottom Chassis in the direction of arrow 1 . See Fig.1-1 A. Insert and press a rod in the Emergency Eject Hole and then the CD Tray will open in the direction of arrow 2 . B. Remove the Tray Door in the direction of arrow 3 by pushing the stoppers forward. C. Release 3 stoppers and remove the Front Bezel Assy. A. Remove the Cabinet in the direction of arrow 4 . See Fig. 1-3 B. When the CD tray has been opened completely, lift 2 points a and remove the CD...

Description Of Circuit

Laserdiod Gwa 4164b

ALPC Automatic Laser Power Control Circuit 1-1. Block Diagram 1-2. ALPC Automatic Laser Power Control Circuit Operation The ALPC block detects the laser output power of the front monitor. The power signal detected with the PD for front monitor detection is input the voltage from the VPD pin 123Pin or the FPDM pin 127Pin , the reference signal of the input signal is input from the VREFPD pin 124Pin . The ALPC block generates the singals from the input laser power signals in the following...

N

Gwa 4166b Jumper

Connects to the power supply 5-and 12-V DC of the host computer. NOTE Be careful to connect with the proper polarity. Connecting the wrong way may damage the system and is not guaranteed . Usually this connector can only be attached one-way. Connect to the IDE Integrated Device Electronics Interface using a 40-pin flat IDE cable. NOTE Do not connect or disconnect the cable when the power is on, as this could cause a short circuit and damage the system. Always turn the power OFF when connecting...