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