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22 Basic Troubleshooting Guide
22.1. Basic Troubleshooting Guide for Traverse Unit (HDMI Module P.C.B)
*Compare the above with OK condition Module
*Compare
the above with OK condition Module
Checking components
a) Check LD current
OPU unit (FFC connection)
Checking Points
8) Jitter out of specification
Problems
b) Check OPU (change to other unit and confirm)
*Check for solder short and/or component
*Check
for solder short and/or component
damaged
IC8051
Q8550, Q8560, Q8561, Q8562
Q8550, Q8551, Q8552, Q8560
*Check for solder short and/or component
*Check
for solder short and/or component
missing/damaged
*Check for solder short and/or component
*Check
for solder short and/or component
damaged
Q8550, Q8551, Q8552, Q8560, Q8561, Q8562
FP8201
IC8251
IC8251
Q8550, Q8551, Q8552, Q8560, Q8561, Q8562
IC8001
*Check for solder short and/or component
*Check
for solder short and/or component
missing/damaged
LB8301, R8321, R8322, LB8302, R8325, R8326
IC8421
*Check for solder short and/or component
*Check
for solder short and/or component
missing/damaged
a) Check laser drive circuitry (voltages and current)
- Check CD laser drive
*Compare the above with OK condition Module
*Compare
the above with OK condition Module
- Check DVD laser drive
*Check voltages and LD current and compare with
*Check
voltages and LD current and compare with
OK Module
OK
Module
a) Check SDRAM address and data bus signal
b) Check video signals
c) Check audio DAC circuitry
signals
Traverse unit
b) Check laser drive circuitry (voltages and current)
c) Check LSI connection to motor drive circuitry
*Compare the above with OK condition Module
*Compare
the above with OK condition Module
a) Check connection from Backend Module to
b) Check motor driver circuitry on voltages and control
*Compare the above with OK condition Module
*Compare
the above with OK condition Module
a) Check motor driver circuitry (voltages)
7) Block noise during play
spinning
- Cannot read CD
- Cannot read DVD
movement
6) Cannot read disc but spindle is
3) Disc not spinning
4) Traverse not moving
5) Traverse and spindle abnormal
2) No TOC/Long TOC
Checking components
1) Distorted picture or abnormal
sound is heard during initialisation
Problems
Checking Points
a) Check SDRAM address, data bus, CLK and
other control signals waveform
IC8051
85
SA-HT740GCP
Содержание SA-HT740GCP
Страница 7: ...7 SA HT740GCP ...
Страница 11: ...11 SA HT740GCP ...
Страница 17: ...8 New Features 8 1 About HDMI 8 1 1 What is HDMI 8 1 2 Advanced Digital Pictures 17 SA HT740GCP ...
Страница 18: ...8 1 3 Advanced Digital Sound 8 1 4 Easy to Use 8 1 5 HDMI Compatible Products 18 SA HT740GCP ...
Страница 29: ...10 1 Disassembly Flow Chart 29 SA HT740GCP ...
Страница 30: ...10 2 Main Components and P C B Locations 30 SA HT740GCP ...
Страница 39: ...Step 3 Push tray assembly to the direction of arrow shown 39 SA HT740GCP ...
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Страница 80: ...SA HT740GCP 80 ...
Страница 94: ...25 Exploded Views 25 1 Cabinet Parts Location 94 SA HT740GCP ...
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Страница 97: ...25 2 Packaging 97 SA HT740GCP ...