SA-HT730 / SAHT930
3
Table of Contents
OBJECTIVE............................................................................................................................. 4
I NO START-UP AND DVD TRANSPORT PROBLEMS................................................. 5
1.
P
OWER
-O
N
S
TART
-U
P
S
EQUENCE
–
W
HERE IS THE PROBLEM
? ........................................... 5
2.
S
ENSORS
,
BELTS
,
AND MOTOR LOCATION
............................................................................ 6
3.
S
IMULATED
F
AILURE
S
YMPTOMS
–
QUICK FIXES
................................................................. 7
4.
T
RAY
R
EMOVAL FOR
S
ENSORS
,
B
ELTS
,
&
D
IAGNOSTIC
A
CCESS
......................................... 8
5.
T
RAY INSTALLATION
(
AFTER REPAIRS
)................................................................................ 9
6.
S
ENSOR TESTING
............................................................................................................... 10
Testing the Tray Loading Motor and Related Sensors .................................................... 10
Testing the Tray Rotation Motor and Related Sensors .................................................... 11
II SHUTDOWN PROBLEM................................................................................................ 12
P
ROTECTION
C
ONCEPT
–
ALL THE SHUTDOWN POSSIBILITIES
................................................ 12
Overall Repair Strategy ................................................................................................... 12
C
ONTROL
U
NIT
R
EPAIR
(SA-HT730
/
SA-HT930)
S
TRATEGY
............................................. 13
Control unit repair Procedure ......................................................................................... 14
Jumper Paths to System Control IC2018 for Shutdown Problems .................................. 15
Control Unit Protection Concept ..................................................................................... 16
S
UBWOOFER
U
NIT
R
EPAIR
(SB-WA730
/
SA-WA930) ........................................................ 17
Subwoofer Repair Strategy – Start by isolaating the problem......................................... 17
Subwoofer Repair Procedure........................................................................................... 18
Subwoofer Disassembly ................................................................................................... 20
Subwoofer Test / Operating Position ............................................................................... 21
III NO AUDIO PROBLEMS ............................................................................................... 22
How to trace down no audio (one or more channels)...................................................... 22
