41
10.2. DVD/CD Laser Diode current measurement
This section will illustrate proceddures of measuring & deriving DVD/CD Laser Diode Current.
DVD Laser Diode Current Measurement
CD Laser Diode Current Measurement
Checking Item/Formula
Remarks
Item Description
1. Measurement the voltage (V
CD
) on the testpoints ) & CL8531(-).
This is voltage across R8566 which has a resistance value of 4.7 ohm.
2. Calculate the CD Laser current by the following formula:
CD_LD=VCD/4.7
1. Measurement the voltage (V
DVD
) on the testpoints ) & CL8532(-).
This is voltage across R8556 which has a resistance value of 4.7 ohm.
2. Calculate the DVD Laser current by the following formula:
DVD_LD=VCD/4.7
Refer to 10.1.2.
Main P.C.B.
(Figure 10-2 Main
P.C.B.)
Refer to 10.1.2.
Main P.C.B.
(Figure 10-2 Main
P.C.B.)
3. Specification for CD laser current is
58 mA
3. Specification for DVD laser current is
58 mA
Summary of Contents for SA-XH201
Page 15: ...15 4 1 Others Licences ...
Page 16: ...16 5 General Introduction 5 1 Power Saving Features ...
Page 17: ...17 5 2 Linked Operations with the TV VIERA Link HDAVI Control ...
Page 18: ...18 5 2 1 Easy Control With Viera Remote Control ...
Page 19: ...19 5 3 Disc Information 5 3 1 Media that can be played ...
Page 20: ...20 5 3 2 File Extension Type Support MP3 JPEG Xvid ...
Page 21: ...21 6 Location of Controls and Components 6 1 Remote Control Key Button Operations ...
Page 22: ...22 6 2 Main Unit Key Button Operations ...
Page 24: ...24 7 3 Connection with an ARC compatible TV ...
Page 47: ...47 12 3 Main Components and P C B Locations ...
Page 76: ...76 ...
Page 78: ...78 ...
Page 122: ...122 MMH1303 ...