Text preview for : hcd-s300_trobleshooting_guide_600.pdf part of panasonic hcd-s300 trobleshooting guide 600 panasonic Fax KXFM90PDW Viewing SGML_VIEW_DATA EU KX-FM90PD-W SVC Audio hcd-s300_trobleshooting_guide_600.pdf
Back to : hcd-s300_trobleshooting_g | Home
DAV-S300
(HCD-S300)
Troubleshooting guide
1
Contents
1. Troubleshooting at Start-up --------------------------------------------------------------- 3
(1) Stand-by Mode
(a) Voltage supply for microcomputer
(b) Output of Reset signal
(c) Setting of Stand-by Mode
(2) Operation mode ----------------------------------------------------------------------------- 4
(a) Detection of Wake-up key
(b) Display of Fluorescent tube
(c) Start-up of DVD circuit
(d) Release of Sound Mute
(e) Setting of tray position ------------------------------------------------------------------ 5
(f) Setting of OP block position
(g)Setting of Tilt default ---------------------------------------------------------------------- 6
(h) Image output
(i) Focus search
2. Troubleshooting in Test mode ------------------------------------------------------------ 8
(1) Display of emergency history
(2) Syscon Diagnosis
(3) Video Output Circuit
3. Miscellaneous -------------------------------------------------------------------------------- 9
(1) Lens cleaning
(2) Compatibility with NEW and OLD board
2
1. Troubleshooting at Start-up
(1) Stand-by Mode
(a) Voltage supply for microcomputer
5.6V for microcomputer is output from power circuit and supplied to audio micro
computer (IC903) when connecting AC plug to an outlet.
(b) Output of Reset signal
Reset signal from reset IC(IC902) lets audio micro computer (IC903) start up.
(c) Setting of Stand-by Mode
Power LED illuminates in red when audio microcomputer starts up normally and moves in
Stand-by Mode. Audio microcomputer detects key / remote input and performs LCD control.
The system changes to Operation Mode when Wake-up input (key/ remote) is recognized.
(Repair Know-how)
In case that audio microcomputer doesn't start up, confirm the fuse (F901) on Power
board. Also, confirm input of reset signal (IC903 12 pin).
3
2) Operation Mode
(a) Detection of Wake-up key
Audio microcomputer (IC903) detects a kind of key when a key on the main body and
remote is pressed. If Wake-up key such as Power button is pressed, the system changes to
Operation Mode.
The color of Power LED changes from red to green when the system turns into Operation
Mode. Also, Power ON terminal of audio microcomputer (IC903 78pin) changes from L to H.
Then each power supply voltage is output from Power board.
(Repair Know-how) Color of LED
In case that the color of LED doesn't change, even though you press Power button on
the set, press Power button on the remote for your confirmation. In case that one of Power
buttons doesn't function, confirm key signal input (IC903 93 pin) or remote signal input (IC
903 42 pin).
(b) Display of Fluorescent tube
Name of the model (DAV-S300) is displayed on Fluorescent tube when audio
microcomputer switched to Operation Mode.
Next, audio microcomputer (IC903) sets the last function to the Mode and displays it on
fluorescent tube. The last function information is stored in back up memory in audio
microcomputer when the system was turned off.
(c) Start-up of DVD circuit
If DVD Mode was used as you turned off the system, DVDPOW output of audio
microcomputer (IC903 78pin) let the voltage for DVD circuit output from power circuit.
Also, the reset signal of reset IC (IC207) is input into DVD microcomputer(IC202
14pin)that enables DVD microcomputer to start up.
If Tuner Mode was used as you turned off the system, since DVD circuit doesn't start up,
the function of (e) or later doesn't work.
d) Release of Sound Mute
Relay switching output of audio microcomputer (IC903 43 pin) enables to release Mute,
switching speaker relay (RY301, RY331, RY361)
You can hear the mechanical sound of click from speaker relay.
4
e) Setting of tray position
Mechanical switch detects the tray position. If the tray is open, DVD circuit closes the tray,
letting loading motor rotate and then set to the status "loaded".
In case that the tray doesn't close within a certain period, open the tray by
counter-rotating the motor to set "Ejected" status.
If the tray operation doesn't complete within a certain period, stop the tray control as it is.
In this case, the status (open/close) is displayed when the control is stopped.
(Repair Know-how) Tray doesn't work.
Confirm by moving the tray manually whether mechanical operation isn't getting heavy
due to catching foreign object. When you use a screwdriver for moving the tray, pay
attention to not damaging to screw hole. (Refer to page 4 on Service manual)
In case that loading motor driver (IC802) becomes extremely hot, confirm output of
loading motor. If no output found, change IC.
(Repair Know-how) After power is turned ON, power is turned OFF automatically.
Open the tray a little manually, confirm whether it is loaded normally. Also, touch loading
motor driver(IC802) for your confirmation whether it becomes extremely hot or not.
(Repair Know-how) Operation of detection switch
If the tray position is normal, the status becomes as follows:
Figure 1, Detection switch
Terminal Close/ Full open/
Chucking Unchucking
IC601 64pin OCSW1 H L
IC601 88pin CKSW1 L H
f) Setting of OP block position
By Servo SP(IC701) output, sled driver(IC802) lets sled motor rotate and move OP block
to the most inner radius. Servo DSP(IC701 23pin) with Limit-In switch input detects the
move of OP block to the most inner radius. Return to the outer radius a little when OP block
moves to the most inner radius.
5
If the position setting doesn't complete within a certain period, move to next operation
automatically.
(Repair Know-how) Sled operation of OP block
Even if OP block is in the most inner radius from first, sled operation is performed to
return to the outer radius a little. If no sled operation is available, touch sled motor
driver(IC802) and confirm whether it becomes extremely hot or not. Also, confirm
input/output of driver and the cancellation of muting (IC802 9pin : L => H)
g) Setting of Tilt default
By Servo DSP(IC701) output, tilt driver (IC801) lets tilt motor rotate and OP block tilt
default set.
(Repair Know-how) Setting of Tilt default
In case that OP block doesn't perform tilt default setting, confirm TLTA, TLTB signal
(IC801 23,26pin) and TILT MUTE signal (IC801 20pin).
(h) Image output
Initial screen is output from video terminal. Data of initial screen is stored in ROM(IC205
or IC206) and output to AV decoder(IC401) via serial bus. And, the initial screen signals are
output by YC signal (IC401,61, 62 pin) and COMP OUT signal (IC401 65pin).
(IMPORTANT) Initial screen is not displayed.
If the setting from (a) to (g) is not completed due to a defect of mechanical switch and so
on, initial screen is not displayed. In case that image is not displayed, confirm each
mechanical operation is completed.
(Repair Know-how) Check of image output
If you confirm image output, confirm both S terminal and VIDEO terminal. If no output
found, confirm signal output path from AV decoder (IC401).
(i) Focus search
It detects whether disc is loaded or not. If there is enough amount of reflected light from a
disc, reading disc is started, letting disc rotate. If just focusing is unavailable, repeat
detection twice, changing search point.
In case that reflected laser light can't be detected with OP block, it judges as "NO DISC"
6
and "NO DISC" is displayed.
Reference Detection of Disc Type
Disc type during playback is automatically detected according to the difference of MIRR
signal created from the reflected laser light from media such as DVD-SL / DVD-DL / CD. If
it's not detected correctly, confirm the value of P-P of RF signal and also make sure
whether reflected laser light is correctly detected. If the proper detection is impossible,
change OP block.
7
2. Troubleshooting in Test Mode
In case that Test Mode cannot start up, confirm the set operation, referring to "1.
Troubleshooting at Start-Up".
(1) Display of emergency history
When you select "4" in Test Mode, you can confirm the contents of error in Emergency
history mode.
If Emergency code is 10/12/14, there is a possibility that the communication between
system controller(IC202) and each digital IC has an error. Confirm soldering of each IC and
connection of each board with connectors etc.
In case that other error is displayed, it's possible to think that scratch on disc or defects of
OP unit (spindle motor included) may cause an error. Confirm that the value of p-p level of
RF signal is over 0.7V, the balanced difference of S curve of FE signal is 15% or less and
the value of S curve p-p level is over 1.0V. If the level doesn't recover after cleaning lens,
change OP block.
(2) Syscon Diagnosis
Self diagnosis recognizes defective point automatically if you select "0" in Test Mode and
"1. ALL" in Check Menu.
The screen stops at an item which requires your confirmation, press "NEXT" button and
go ahead. In the case, "OK" is displayed instantly and then goes to next item.
In case that it doesn't go further even if you press NEXT, confirm the communication
route of IC related.
(3) Video Output Circuit
Color bar for adjusting video level is displayed when you select "6" in Test Mode Menu.
Color bar signal is output from AV decoder according to serial data commander from audio
microcomputer(IC903). If the color bar is output normally, analogue video output circuit
except for OSD operation is normal.
8
Miscellaneous
(1) Lens cleaning
If the value of level of RF signal is smaller than the nominal value clean the lens with
feather touch. Use certainly the dedicated fine swab (P/N: J-2501-023-A) for cleaning.
Clean the lens without liquid lens cleaner, otherwise unevenness may occur on the
surface of lens by wiping.
OP block of DVD is very sensitive mechanism. If you wipe strongly, it may damage.
When P-P value of RF signal recovers by cleaning lens, confirm that OP block isn't
damaged , letting it access to the inner radius and outer radius by turns around 10 times.
(2) Compatibility with NEW and OLD board
POWER board, AUDIO board, DVD board and PW932 board have each old type and
new type. If you combine Power board with Audio board or DVD board with PW932 board,
mixing new type and old type, the malfunction may occur.
The details of recognition of boards and combination are introduced in T/N. Refer to it
and use with the correct combination.
9
Sony Corporation
Home Audio Company
Printed in Japan 2001.8
9-929-051-21 Quality
Printed by Quality Assurance Dept.
10