Panasonic SA-HT995EE Service Manual ▷ View online
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
97
SA-HT995EE
22.2. Basic Troubleshooting Guide for HDMI AV output
RX3707, RX3708, RX3701
R3901
LB8702
13) Hot-Plug signal
RX3706
LB3906, R3902, R3903, Q3901, D3901
16) Video data lines from LSI (IC8001) to
Up-Converter (IC3701)
14) TMDS output swing amplitude control resistor
15) Host Interface External Input Clock from
L3903, L3904, L3905
L3906
LB3905, R3905, Q3902, R3904
LB3904, R3907, Q3903, R3906
RX3902
R3921
LB3901, L3901, L3902
- Data
LB3702
- Clock
5) HDMI Transmitter communication lines to TV
2) +5V supply to TV
mode from 480p to 720p / 1080i,
- Pins : 55, 57, 62, 67, 71, 75, 79
4) HDMI Output TMDS signal lines
the TV display becomes blank.
2) When switching the video output
1) Supply for IC3701 up-conversion pin
LB3703
1) TV does not have display. Set
3) HDMI Connector Solderbility condition
FL display shows U702 / U703.
1) Check setting of the set in Setup Menu whether
HDMI video output is turned ON.
IC3952 (Pin 4)
P3901
Problems
Checking Points
Checking components
5) HDMI got no audio output.
1) Audio Data Lines
RX8403, RX8402
*Check f
f
or s
s
older s
s
hort an
an
d/or
signal c
c
ondition
component m
component
m
issing/damaged as well as
d
as well as
3) Picture shown on TV not
clear / sharp
1) Up-Converter (IC3701) Luminance output
RX3702
4) Colour Problem. TV Screen is
1) Up-Converter (IC3701) Component Y, Pb, Pr output
RX3703, RX3704, RX3705
White / Blue / Purple.
11) HDMI Pixel clock output from Up-Con to HDMI
LSI (IC8001) to Up-Con IC (IC3701)
7) Local Port Slave Address setting resistor
8) HDMI Transmitter +3.3V supply
9) HDMI Transmitter +1.8V supply
10) HDMI Up-con +3.3V supply
Transmitter
12) Up-Con IC I2C Data and Clock Line
IC3782 (Pin1), LB3902
LB3701
6) HDMI Transmitter communication lines from LSI
- Data , SDA
- Clock, SCL
98
SA-HT995EE
23 Overall Block (HT995)
DVD UNITDVD
UNIT
(DV3.2)
Component, Composite,S video
IC2801
IC2103
IC2102
IC2018
IC904
IC6901
IC2004
IC1101
FROM
IC2801
(C/Y/G/B & AUDIO SIGNALS)
JK1001
Motor
Drive
Loading
DC Det
PCON
FL+/FL-
SYNC
IC5000/IC5200
IC5300/IC5400
JK2001
JK6802
JK6804
S-video
AUX
MUSIC PORT
Composite
Component(CB/CR)
Head-Phone
MIC
Video
Buffer
Tuner Pack
FM/AM
Headphone
Amp
System Control
Loading Mechanism
Control Block(DU2)
EEPROM
DRIVER
SCART JACK
Display Driver
FL Display
Regulator
DC Det
IC2204
AMP
AC IN and
Transformer
Power supply
BLOCK
AC
Speaker
(subwoofer)
Terminal
For
Speaker
Power AmpPower
Amp
ASP
SA-HT995
SA-HT995EE
99
23.1. HT995 DVD Unit Block
DV3.2
Audio
output
Video output
(Y, C, CR/PR/R, CB/PB/B, Y/PY/G)
DVD SystemDVD
System
LSI
EFM+
Demodulate
ECC
MPEG2
Decode
SP Motor
TRV Motor
IC8611
TRV sw
CD
DVD
IC8251
IC8001
IC8151
IC8111
D+3.3V
VDD
1.2V
IC8051
IC8421
IC8651
Driver
FO/TR Act
TRV/SP Motor
OPU
UNIT
LD
Drive
REG
REG
LD
Drive
EEPROM
M
M
M+9V
+2.7V
D+5V
SD RAMSD
RAM
Flash ROMFlash
ROM
Audio
DAC
+5V
SA-HT995EE
100
Click on the first or last page to see other SA-HT995EE service manuals if exist.