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10.3. Basic Troubleshooting Guide for Traverse Unit (Main P.C.B.)
Problems
Checking Points
Checking components
b) Check video signals (CVBS)
LB8317, R8325, IC8011 (Pin 63)
a) Check SDRAM address, data
bus, CLK and other control signals
waveform
IC8051
1) Distorted picture or
abnormal sound is head
during the initialization
c) Check audio DAC circuitry
* Compare the above with OK
condition DVD Module P.C.B
LB8422 till LB8428
*Check for solder short and/or
component missing/damaged
b) Check laser drive circuitry
(Voltages & current)
Q8552, CL8532 (For DVD),
Q8562, CL8530 (For CD)
a) Check motor driver circuitry
(VCC PVCC)
IC8251 Pin 8, (+9V), 19 (+5V)
2) No TOC/Long TOC
c) Check LSI IC connection to
motor drive circuitry
IC8001 Pin 90, 93, 94, 95
IC8251 Pin 11 to 18
* Check for solder short and/or
component missing/damaged
a) Check connection from Main to
Traverse unit
FP8251
3) Disc not spinning
4) Traverse not moving
5) Traverse and spindle
abnormal movement
b) Check motor driver circuitry on
the voltages and control signals
IC8251
* Check for solder short and/or
component damaged
6) Cannot read the disc but
spindle motor is spinning
- Cannot read CD/DVD
a) Check laser drive circuitry
(voltages and current)
- Check CD Laser Drive
- Check DVD Laser Drive
* Check voltages and LD current
and compare with OK condition
Main P.C.B.
Q8552, LB8551
(For DVD Laser Drive current)
Q8562, LB8561
(For CD Laser Drive current)
7) Block Noise during play
a) Check SDRAM address and
data bus signal
IC8051
8) Jitter out of specification
a) Check LD current
b) Check OPU
(Change to other unit and
confirmed operating condition)
OPU Unit (Traverse unit), FPC
connection (FP8531 & FP8251)
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 ...