Panasonic SAHT730 Technical Guide - Page 3

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Table of Contents OBJECTIVE...4 I NO START-UP AND DVD TRANSPORT PROBLEMS 5 1. POWER-ON START-UP SEQUENCE - WHERE IS THE PROBLEM 5 2. SENSORS, BELTS, AND MOTOR LOCATION 6 3. SIMULATED FAILURE SYMPTOMS - QUICK FIXES 7 4. TRAY REMOVAL FOR SENSORS, BELTS, & DIAGNOSTIC ACCESS 8 5. TRAY INSTALLATION (AFTER REPAIRS 9 6. SENSOR TESTING ...10 Testing the Tray Loading Motor and Related Sensors 10 Testing the Tray Rotation Motor and Related Sensors 11 II SHUTDOWN PROBLEM 12 PROTECTION CONCEPT - ALL THE SHUTDOWN POSSIBILITIES 12 Overall Repair Strategy 12 CONTROL UNIT REPAIR (SA-HT730 / SA-HT930) STRATEGY 13 Control unit repair Procedure 14 Jumper Paths to System Control IC2018 for Shutdown Problems 15 Control Unit Protection Concept 16 SUBWOOFER UNIT REPAIR (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 SA-HT730 / SAHT930 3

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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