BDP-S7200 - Sony DVD Service Manual (repair manual). Page 5

BU Replacement

Optical Block Unit (BU) IOP check fl ow (zz) ~ [Before BU Replacement]

• 

ESD Measures 
It is necessary to check the working space ESD condition
before starting the Drive Part (BU) repairs
The ESD-resistance of BD Laser is weaker than DVD/CD Laser
To prevent ESD destruction, please make sure the working
space and human ESD.

• 
• 
1-2-2  BU (Optical Block) Repair Guide

                   BDP set series component structure is as same as conventional DVD Players.
            However BD player requires precise read out functions and also secure contents Protection system.
            Since above requirement, it is necessary to set/adjust BU data to EEPROM.

            The following cases need Adjustments;
 

(1)Replace BU (MB is original)

 

(2)Replace MB (BU is original)

 

(3)Replace both BU and MB

            •JIG Requirement
 

Digital camera (recommend with macro mode)

 

Barcode decoder (BDPRdec_ver3.0) installed in JIG PC’s

 USB 

memory

 

ESD work bench

            •Procedure (all cases) Refer the diagram

         Remarks:

                The servo adjustment procedure will be carried out during OP data Writing.

         There is no manual adjustment procedure. LD ON TIME history doesn’t carry over.

         Do not touch any optical block parts, Turn Table and during replacing. BD Laser diode

         is very sensitive!

1-5

Enter Service Mode

Press <OPEN/CLOSE>, <PLAY>,<STOP>

and plug in AC Power

Inside *Service Mode Menu

Select [8] Drive

Inside *Drive

Select [7] OP Check Menu

Inside *OP Check Menu

Select [3] dIOP then press ‘ENTER’

Specifi cation dIOP

BD: ± 6mA

DVD, CD: ± 9mA

AC Power OFF

IOP out of specifi cation need BU

replacement

Optical Block Unit (BU) replace

(Flowchart yy)