DOWNLOAD Panasonic SA-XH165EE / SA-XH165GS / SC-XH165EE Service Manual ↓ Size: 11.79 MB | Pages: 127 in PDF or view online for FREE

Model
SA-XH165EE SA-XH165GS SC-XH165EE
Pages
127
Size
11.79 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio / DVD HOME THEATER SOUND SYSTEM
File
sa-xh165ee-sa-xh165gs-sc-xh165ee.pdf
Date
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Panasonic SA-XH165EE / SA-XH165GS / SC-XH165EE Service Manual ▷ View online

37
8.1.1.
SMPS P.C.B.
Fig. 1. SMPS P.C.B.
Photocouple:
PC5702, PC5799
Switching IC: IC5799
Switching IC: IC5701
Transformer: T5701
Photocouple: PC5720
Thermal Diode: D5802
38
8.1.2.
Main P.C.B.
Fig. 2. Main P.C.B.
IC2302,
LB2301
L2902,
Q2904
IC2901,
L2908
R2399, LB2774
(Side B of Main P.C.B.)
(Side A of Main P.C.B.)
Q2902
Q2903
39
8.2.
DVD/CD Laser Diode current measurement.
This section will illustrate procedures 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 CL8530(+) & 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 CL8530(+) & 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 8.2.1. 
Backend P.C.B. 
(Fig. 3. Backend 
P.C.B.)
Refer to 8.2.1. 
Backend P.C.B. 
(Fig. 3. Backend 
P.C.B.)
3. Specification for CD laser current is
58 mA
3. Specification for DVD laser current is
58 mA
40
8.2.1.
Backend P.C.B
Fig. 3. Backend P.C.B.
CL8530, CL8531, CL8532
R8556
R8566
(Side A of Backend P.C.B.)
(Side B of Backend P.C.B.)
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