Philips DVP3358K User manual

TABLE OF CONTENTS
Page
Version 1.1
Service Manual
. Technical Specifications…………....………………………..............1-2
. Safety Instruction, Warning & Notes….……………………....….....1-3
. Mechanical and Dismantling Instructions…………........................3-1
. Software Version & Upgrades, Region Code Change..……..........4-1
. Trouble Shooting Chart……………………………………………….5-1
. Wiring Diagram………………………………………..………..….….6-1
. Electrical Diagrams and Print-layouts..….…………………....….…7-1
. Set Mechanical Exploded view & Part list.…………………..….….8-1
©Copyright 2009 Philips Consumer Electronics B.V. Eindhoven, The Netherlands
All rights reserved. No part of this publication may be reproduced, stored in aretrieval system or
transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise
without the prior permission of Philips.
CLASS 1
LASER PRODUCT
PHILIPS
GB
DVP3358(K)
DVP3358K/93
. DFU Instruction..............................................................................2-1
. Revision List..................................................................................9-1
Published by FK-0915BU AVM Printed in The Netherlands Subject to modification 3142 785 33631
DVP3358/96

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Note
6SHFLÀFDWLRQDQGGHVLJQDUHVXEMHFWWRFKDQJH

without notice.
Accessories supplied
Remote control and batteries
Audio/video cables
AC Power cable
User Manual
Playback media
DVD-Video, Video CD/SVCD, Audio CD, CD-R/
CD-RW, DVD+R/+RW, DVD-R/-RW, DivX-CD,
3LFWXUH&'03&':0$&'86%ÁDVKGULYH
USB
Compatibility: Hi-Speed USB (2.0)
Class support: UMS (USB Mass Storage Class)
TV standard
Number of lines:
625 (PAL/50Hz); 525 (NTSC/60Hz)
Playback: Multi-standard (PAL/NTSC)
Video performance
Video DAC: 12 bits, 108 MHz
Y Pb Pr: 0.7 Vpp ~ 75 ohm
Video output: 1 Vpp ~ 75 ohm
Video format
Digital compression:
MPEG 2: DVD/SVCD
MPEG 1: VCD/DivX
Horizontal resolution:
DVD: 720 pixels (50 Hz); 720 pixels (60 Hz)
VCD: 352 pixels (50 Hz); 352 pixels (60 Hz)
Vertical resolution:
DVD: 576 lines (50 Hz); 480 lines (60 Hz)
VCD: 288 lines (50 Hz); 240 lines (60 Hz)
Audio performance
DA converter: 24 bits, 192 kHz
Frequency response:
DVD: 4 Hz - 22 kHz (48 kHz);
4 Hz - 44 kHz (96 kHz)
SVCD: 4 Hz - 20 kHz (44.1 kHz);
4 Hz - 22 kHz (48 kHz)
CD/VCD: 4 Hz - 20 kHz (44.1 kHz)
Signal-Noise (1 kHz): > 90 dB
Dynamic range (1 kHz): > 80 dB
Crosstalk (1 kHz): > 70 dB
Distortion/noise (1 kHz): > 65 dB
MPEG MP3: MPEG Audio L3
Audio format
Digital:
MPEG/AC-3/PCM: Compressed digital (16, 20, 24
bits fs, 44.1, 48, 96 kHz)
MP3 (ISO 9660): 96, 112, 128, 256 kbps &
variable bit rate fs, 32, 44.1, 48 kHz
Analog sound stereo
Dolby surround compatible downmix from Dolby
Digital multi-channel sound
Connections
Y Pb Pr output: Cinch 3x
Video output: Cinch (yellow)
Audio output (L+R): Cinch (white/red)
Digital output:
1 coaxial: IEC60958 for CDDA/LPCM;
IEC61937 for MPEG 1/2, Dolby Digital
Main unit
Dimensions (w x h x d): 360 x 38 x 203 (mm)
Net Weight: approximately 1.3 kg
Power
Power supply rating: 110 V - 240V; 50/60 Hz
Power consumption: < 10 W
Power consumption in standby mode: < 1 W
/DVHU6SHFLÀFDWLRQ
Type: Semiconductor laser InGaAIP (DVD), AIGaAs
(CD)
Wave length: 658 nm (DVD), 790 nm (CD)
Output Power: 7.0 mW (DVD), 10.0 mW (VCD/CD)
Beam divergence: 60 degrees
1-2
for DVP3358K/93

Specification
Note
Specification and design are subject to change
•
without notice.
Accessories supplied
Remote control and batteries•
Audio/video cables•
Playback media
DVD-Video, Video CD/SVCD, Audio CD, CD-R/•
CD-RW, DVD+R/+RW, DVD-R/-RW, DivX-CD,
Picture CD, MP3-CD, WMA-CD, USB flash drive
USB
Compatibility: Hi-Speed USB (2.0)•
Class support: UMS (USB Mass Storage Class)•
TV standard
Number of lines:•
625 (PAL/50Hz); 525 (NTSC/60Hz)•
Playback: Multi-standard (PAL/NTSC)•
Video performance
Video DAC: 12 bits, 108 MHz•
Y Pb Pr: 0.7 Vpp ~ 75 ohm•
Video output: 1 Vpp ~ 75 ohm•
Video format
Digital compression:•
MPEG 2: DVD/SVCD•
MPEG 1: VCD/DivX•
Horizontal resolution:•
DVD: 720 pixels (50 Hz); 720 pixels (60 Hz)•
VCD: 352 pixels (50 Hz); 352 pixels (60 Hz)•
Vertical resolution:•
DVD: 576 lines (50 Hz); 480 lines (60 Hz)•
VCD: 288 lines (50 Hz); 240 lines (60 Hz)•
Audio performance
DA converter: 24 bits, 192 kHz•
Frequency response:•
DVD: 4 Hz - 22 kHz (48 kHz);•
4 Hz - 44 kHz (96 kHz)
SVCD: 4 Hz - 20 kHz (44.1 kHz);•
4 Hz - 22 kHz (48 kHz)
CD/VCD: 4 Hz - 20 kHz (44.1 kHz)•
Signal-Noise (1 kHz): > 90 dB (A-weighted)•
Dynamic range (1 kHz): > 80 dB (A-weighted)•
Crosstalk (1 kHz): > 70 dB•
Distortion/noise (1 kHz): > 65 dB•
MPEG MP3: MPEG Audio L3•
Audio format
Digital:•
MPEG/AC-3/PCM: Compressed digital (16, 20, 24•
bits fs, 44.1, 48, 96 kHz)
MP3 (ISO 9660): 96, 112, 128, 256 kbps &•
variable bit rate fs, 32, 44.1, 48 kHz
Analog sound stereo•
Dolby surround compatible downmix from Dolby•
Digital multi-channel sound
Connections
Y Pb Pr output: Cinch 3x•
Video output: Cinch (yellow)•
Audio output (L+R): Cinch (white/red)•
Digital output:•
1 coaxial: IEC60958 for CDDA/LPCM;•
IEC61937 for MPEG 1/2, Dolby Digital
5.1 channel analog output•
Audio Front L + R: Cinch (white/red)•
Audio Rear L + R: Cinch (white/red)•
Audio Center: Cinch (blue)•
Audio Subwoofer: Cinch (black)•
Main unit
Dimensions (w x h x d): 360 x 37 x 209 (mm)•
Net Weight: approximately 1.3 kg•
Power
Power supply rating: 110 V - 240V; 50/60 Hz•
Power consumption: < 10 W•
Power consumption in standby mode: < 1 W•
Laser Specification
Type: Semiconductor laser InGaAIP (DVD), AIGaAs•
(CD)
Wave length: 658 nm (DVD), 790 nm (CD)•
Output Power: 7.0 mW (DVD), 10.0 mW (VCD/CD)•
Beam divergence: 60 degrees•
for DVP3358/96
1-2

Safety instruction
1. General safety
Safety regulations require that during a repair:
. Connect the unit to the mains via an isolation transformer.
. Replace safety components indicated by the symbol ,
only by components identical to the original ones. Any
other component substitution (other than original type)
may increase risk of fire or electrical shock hazard.
Safety regulations require that after a repair, you must
return the unit in its original condition. Pay, in particular,
attention to the following points:
. Route the wires/cables correctly, and fix them with the
mounted cable clamps.
. Check the insulation of the mains lead for external
damage.
. Check the electrical DC resistance between the mains
plug and the secondary side:
1) Unplug the mains cord, and connect a wire between
the two pins of the mains plug.
2) Set the mains switch the “on” position (keep the
mains cord unplug).
3) Measure the resistance value between the mains
plug and the front panel, controls, and chassis
bottom.
4) Repair or correct unit when the resistance
measurement is less than 1M
¡
.
5) Verify this, before you return the unit to the
customer/user (ref. UL-standard no. 1492).
6) Switch the unit “off”, and remove the wire between
the two pins of the mains plug.
2.Laser safety
This unit employs a laser. Only qualified service personnel
may remove the cover, or attempt to service this device
(due to possible eye injury).
Laser device unit
Type :SemiconductorlaserGaAlAs
Wavelength : 650nm (DVD)
: 780nm (VCD/CD)
Output power : 7mW (DVD)
:10mW(DVD/CD)
Beam divergence: 60 degree
Note: Use of controls or adjustments or performance of
procedure other than those specified herein, may result in
hazardous radiation exposure. Avoid direct exposure to
beam.
Safet
y
instruction, Warnin
g
& Notes
1-3

Warning
1.General
. All ICs and many other semiconductors are susceptible to
electrostatic discharges (ESD). Careless handing during
repair can reduce life drastically. Make sure that, during
repair, you are at the same potential as the mass of the
set by a wristband with resistance. Keep components and
tools at this same potential. Available ESD protection
equipment:
1) Complete kit ESD3 (small tablemat, wristband,
connection box, extension cable and earth cable)
4822 310 10671.
2) Wristband tester 4822 344 13999.
. Be careful during measurements in the live voltage
section. The primary side of the power supply , including
the heat sink, carries live mains voltage when you
connect the player to the mains (even when the player is
“off”!). It is possible to touch copper tracks and/or
components in this unshielded primary area, when you
service the player. Service personnel must take
precautions to prevent touching this area or components
in this area. A “lighting stroke” and a stripe-marked
printing on the printed wiring board, indicate the primary
side of the power supply.
. Never replace modules, or components, while the unit is
“on”.
2. Laser
. The use of optical instruments with this product, will
increase eye hazard.
. Only qualified service personnel may remove the cover
or attempt to service this device, due to possible eye
injury.
. Repair handing should take place as much as possible
with a disc loaded inside the player.
. Text below is placed inside the unit, on the laser cover
shield:
Notes: Manufactured under licence from Dolby
Laboratories. The double-D symbol is trademarks of Dolby
Laboratories, Inc. All rights reserved.
CAUTION: VISIBLE AND INVISIBLE LASER
RADIATION WHEN OPEN, AVOID EXPOSURE
TO BEAM.
1-4

Lead-Free requirement for service
INDENTIFICATION:
Regardless of special logo (not always indicated)
One must treat all sets from 1.1.2005 onwards, according
next rules.
Important note: In fact also products a little older can also
be treated in this way as long as you avoid mixing
solder-alloys (leaded/ lead-free). So best to always use
SAC305 and the higher temperatures belong to this.
Due to lead-free technology some rules have to be
respected by the workshop during a repair:
xUse only lead-free solder alloy Philips SAC305 with
order code 0622 149 00106. If lead-free solder-paste is
required, please contact the manufacturer of your
solder-equipment. In general use of solder-paste within
workshops should be avoided because paste is not easy
to store and to handle.
xUse only adequate solder tools applicable for lead-free
solder alloy. The solder tool must be able
oTo reach at least a solder-temperature of 400°C,
oTo stabilize the adjusted temperature at the
solder-tip
oTo exchange solder-tips for different applications.
xAdjust your solder tool so that a temperature around
360°C – 380°C is reached and stabilized at the solder
joint. Heating-time of the solder-joint should not exceed
~ 4 sec. Avoid temperatures above 400°C otherwise
wear-out of tips will rise drastically and flux-fluid will be
destroyed. To avoid wear-out of tips switch off un-used
equipment, or reduce heat.
xMix of lead-free solder alloy / parts with leaded solder
alloy / parts is possible but PHILIPS recommends
strongly to avoid mixed
solder alloy types (leaded and lead-free). If one cannot
avoid, clean carefully the
solder-joint from old solder alloy and re-solder with new
solder alloy (SAC305).
xUse only original spare-parts listed in the
Service-Manuals. Not listed standard-material
(commodities) has to be purchased at external
companies.
xSpecial information for BGA-ICs:
- always use the 12nc-recognizable soldering
temperature profile of the specific BGA (for
de-soldering always use highest lead-free
temperature profile, in case of doubt)
- lead free BGA-ICs will be delivered in so-called
‘dry-packaging’ (sealed pack including a silica gel
pack) to protect the IC against moisture. After
opening, dependent of MSL-level seen on
indicator-label in the bag, the BGA-IC possibly
still has to be baked dry. This will be
communicated via AYS-website.
Do not re-use BGAs at all.
xFor sets produced before 1.1.2005, containing
leaded soldering-tin and components, all needed
spare-parts will be available till the end of the
service-period. For repair of such sets nothing
changes.
xOn our website:
www.atyourservice.ce.Philips.com
You find more information to:
BGA-de-/soldering (+ baking instructions)
Heating-profiles of BGAs and other ICs used in
Philips-sets
You will find this and more technical information
within the “magazine”, chapter “workshop news”.
For additional questions please contact your local
repair-helpdesk.
Notes
1-5

Product overview
Main unit
a2(Standby-on)
Turn on the DVD player or switch to•
standby mode.
bDisc compartment
cDisplay panel
dZ (Open/Close)
Open or close the disc compartment.•
eu(Play/Pause)
Start, pause or resume disc play.•
f(USB) jack
Connect a USB flash drive.•
gMIC
Audio input from a microphone.•
4
31 2 6
57
Remote control
4
3
6
7
9
8
1
5
2
16
17
12
15
13
14
10
11
18
a2(Standby-On)
Turn on the DVD player or switch to•
standby mode.
bZ (Open/Close)
Open or close the disc compartment.•
cDISC MENU
Access or exit the disc menu.•
Switch to disc mode.•
For VCD/SVCD, turn PBC (Playback•
Control) on or off in PBC mode.
2-1
DVP3358K/93

dv V b B (Navigation buttons)
Navigate through the menus.•
Search fast-forward (• B) or fast-
backward (b). Press repeatedly to
change the search speed.
Search slow-forward (• v) or slow-
backward (V). Press repeatedly to
change the search speed.
e2BACK
Return to the previous display menu.•
For DVD, navigate to the title menu.•
For VCD version 2.0 or SVCD with•
PBC turned on, return to the menu.
fí/ë(Previous/Next)
Skip to the previous or next title,•
chapter, or track.
Press and hold for fast-backward or•
fast-forward search.
g(USB)
Switch to USB mode and display the•
content.
hNumeric buttons
Select an item to play.•
iSUBTITLE
Select DVD or DivX subtitle language.•
Access the menu to USB copy or USB•
delete.
j,ZOOM
Fit the picture format to the TV screen.•
Zoom in or out of the picture.•
kVOCAL
Change the audio channel of a karaoke•
disc.
lKARAOKE
Access or exit the karaoke menu.•
mAUDIO/CREATE MP3
Select an audio language/channel.•
Access the menu to create MP3.•
nx(Stop)
Stop disc play.•
ou(Play/Pause)
Start, pause or resume disc play.•
pINFO
For disc, display the current status or•
disc information.
For slideshows, display a thumbnail view•
of photo files.
qOK
Confirm an entry or selection.•
rSETUP
Access or exit the setup menu.•
2-2
DVP3358K/93

Product overview
Main unit
a2(Standby-on)
Turn on the DVD player or switch to•
standby mode.
bDisc compartment
cDisplay panel
dZ (Open/Close)
Open or close the disc compartment.•
eu(Play/Pause)
Start, pause or resume disc play.•
f(USB) jack
Connect a USB flash drive.•
4
31 2 6
5
Remote control
4
3
6
7
9
8
1
5
2
16
17
12
15
13
14
10
11
18
a2(Standby-On)
Turn on the DVD player or switch to•
standby mode.
bZ (Open/Close)
Open or close the disc compartment.•
cDISC MENU
Access or exit the disc menu.•
Switch to disc mode.•
For VCD/SVCD, turn PBC (Playback•
Control) on or off in PBC mode.
2-1
DVP3358/96

dv V b B (Navigation buttons)
Navigate through the menus.•
Search fast-forward (• B) or fast-
backward (b). Press repeatedly to
change the search speed.
Search slow-forward (• v) or slow-
backward (V). Press repeatedly to
change the search speed.
e2BACK
Return to the previous display menu.•
For DVD, navigate to the title menu.•
For VCD version 2.0 or SVCD with•
PBC turned on, return to the menu.
fí/ë(Previous/Next)
Skip to the previous or next title,•
chapter, or track.
Press and hold for fast-backward or•
fast-forward search.
g(USB)
Switch to USB mode and display the•
content.
hNumeric buttons
Select an item to play.•
iSUBTITLE
Select DVD or DivX subtitle language.•
Access the menu to USB copy or USB•
delete.
j,ZOOM
Fit the picture format to the TV screen.•
Zoom in or out of the picture.•
kREPEAT
Toggle between various repeat modes.•
lREPEAT A-B
Mark the section for repeat play; turn•
off repeat mode.
mAUDIO/CREATE MP3
Select an audio language/channel.•
Access the menu to create MP3.•
nx(Stop)
Stop disc play.•
ou(Play/Pause)
Start, pause or resume disc play.•
pINFO
For disc, display the current status or•
disc information.
For slideshows, display a thumbnail view•
of photo files.
qOK
Confirm an entry or selection.•
rSETUP
Access or exit the setup menu.•
2-2
DVP3358/96

Mechanical and Dismantling Instructions
Dismantling Instruction
The following guidelines show how to dismantle the player.
Step1: Remove 5 screws around the Top Cover, and then remove the Top Cover (Figure 1).
Figure 1
Step2: If it is necessary to dismantle Loader or Front Panel, the Front door should be removed first. (Figure 2)
Note: Make sure to operate gently otherwise the guider would be damaged.
Figure 2
3-1
Please kindly note that dismantle the front door
assembly carefully to avoid damage tray and the front door.
Detailed information please refer to the model set.

Mechanical and Dismantling Instructions
Dismantling Instruction
Step3: If the tray can’t open in normal way, you can make it through the instruction as below (Figure 3).
Note: Make sure to operate gently otherwise the guider would be damaged.
Figure 3
Step4: Dismantling Front Panel, disconnect the connectors (XP5, XP6. XP7), need release 4 snaps of Front Panel
and 2 snaps of bottom cabinet , then gently pull the Panel out from the set. (Figure 4 - Figure 6)
Figure 4
3-2
Detailed information please refer to the model set.
XP2
XP3
XP4
XP5
XP1
XP7
XP6
SNAP
SNAP
SNAP
SNAP
SNAP

3-3
Mechanical and Dismantling Instructions
Dismantling Instruction
Figure 5
Step5: Dismantling Loader, disconnect the 3 connectors (XP2, XP3, XP4) aiming in the below figure, and remove 1 screw that
connects the loader and the bottom cabinet. (Figure 5 & 6)
Figure 6
Detailed information please refer to the model set.

Mechanical and Dismantling Instructions
Dismantling Instruction
Step6: Dismantling Main Board, first disconnect the connector (XP1), and then remove 5 screws. (Figure 7)
Figure 7
Step7: Remove the 2screws on Power Board to dismantle the Power Board. (Figure 7)
3-4
Detailed information please refer to the model set.

Software upgrade
Preparation to upgrade software
1) Start the CD Burning software and create a new CD
project (Data Disc) with the following setting:
Label: DVP3XXX (No need the label name)
File Name: DVPXXXX(K)_XX.BIN
Power on the set and open the tray, then press <5><5>
to check the File Name.
Note: It is required capital letter for the File System
name.
2) Burn the data onto a blank CDR
A. Procedure for software upgrade:
1) Power on the set and insert the prepared Upgrade
CDR.
2) The set will starts reading disc & response with the
following display TV screen:
Upgrade File DETECTED
Upgrade?
Press Play TO START.
3) Press <OK> button to confirm, then screen will display :
Files coping…
UPGRADING…
4) The upgraded tray will automatically open when files
coping complete, then take out the disc.
5) About 1 minute later, the trace will automatically close
when upgrading complete.
B. Read out the software versions to confirm upgrading
1) Power on the set and press <Setup> button on the
remote control.
The software version and other information are display
on the TV screen as follows:
4-1
Caution: The set must not be power off during
upgrading, Otherwise the Main board will be
damaged entirely.
Region Code Change
1) Power on the set and open the tray door;
2) Press the "Setup" button on the remote control,then
the setup interface should be displayed on the TV screen;
3) Move the down cursor on remote control to choose "Reference"
and press "1" "3" "8" "9" "3" "1" on the remote control;
4) Then move the up or down cursors to choose the region code.
Note: restart after above steps.
* The other upgrade SW way is by memory, the steps are the
same as CDR's, create the upgrade file into memory, and
connect the USB flash drive to the USB socket on set, then
press "USB" on remote control to access the content and
play the upgrade file as above upgrade procedure.
*
2) Press<1><3><7><9> button or press down cursor
on remote control to choose "Preference" and press
right & down cursors to choose "Version Info".
Model DVP33XX(K) XX
File Name DVP33XX(K) XX.BIN
Version XX.XX.XX.XX
RISC XX.XX.XX.XX
Servo XX.XX.XX.XX
Region Code X
HDCP PASS(except press<1><3><7><9>)

5-1
Spindle motor does not move
Yes
Yes
No
No
No
No
Yes
Check whether “M5V”
(+5V) voltage is normal.
Correct connection
Check the M5V power supply
Check/Replace Q5,Q6,Q7,Q8.
Check/ Replace U1.
Check opu focus
1. Check U1 25pin FOCUS_PWM
signals
2.If there are F+, F-, T+ and T-
signals output from U2.
Check/Replace the loader
Yes
Yes
No
Go
Check whether laser voltage
(1.9V for CD & 2.4V for DVD)
on L9 and L10
Check the FFC connection
between 24P and the loader.
1.Whether voltage on pin 23 of U1
varies between 0 and 3.3V (3.3V for
CD and 0V for DVD),
2.Whether peripheral components
are eroded or badly soldered.
Trouble shooting chart
Motor no move
FOCUS_PWN waveform

5-2
The power can not be on or off
Go
Yes
Yes
No
No
The power can’t be
on or off
Yes
Repair the power board
Check the power supply
on the power board is
normal.
Check/Correct
connection
Whether the connection
to K301 is broken. Correct the connection
Replace U1.
No
No
Yes
Yes
Check if the XS301 on the
front board to XP5 on the
decoder board is in good
contact.
Whether there is 0V and
3.3V voltage difference on
Pin 106 PCON of U1.
Trouble shooting chart

5-3
All output voltages on the power board is 0V or deviated.
No
No
No
Yes
No
U1(PIN 8 - Drain waveform)
Replace F1
Replace C1&C2 if D1, D2, D3, D4 are
normal.
Check/ replace U1.
Check whether U1 are eroded.
All output voltages on
the power board is 0V or
deviated
Check whether there is
300V on C1 or C2.
Check whether 100KHz
oscillating signal on
Pin6 of U1
Check if +5V and +12V are
short.
Check whether the components in the
short-circuit voltage are defected or eroded.
Yes
Yes
Yes
Yes
U1(PIN 3 - RC waveform)
Trouble shooting chart
Check whether
F1 is blown

5-4
Disc cannot be read.
No
Yes
No
Yes
No
Yes
Yes
No
No
Yes
Disc cannot be read.
Check the loaded circuit
1.Check voltage on pin 23 of U1 varies
between 0 and 3.3V:
Æ3.3V for CD
Æ0V for DVD
2.Check whether peripheral components
are eroded or defect
Check the FFC connection
between 24P and the loader.
Check U1 and peripheral components
Re-solder or replace the defective parts
Check the connection
between U1
Correct connection
Replace U1 or loader.
Yes
Check whether there is laser
voltage (1.9V for CD and 2.4V for
DVD) on L9 and L10.
Check if there is RFO signal on
pin17 of XP2. (The normal RFO
signal is a clear reticulated wave)
Trouble shooting chart
Check U1, U2, and
peripheral components are
eroded or badly soldered.

5-5
Only DVD disc or only disc except DVD can be played
No
No
Yes
Only DVD disc, or only disc
exce
p
t DVD can be Pla
y
ed.
Check the FFC
connection between
24pin and the loader.
Check the loaded circuit
Check the solder status on U1 and
peripheral components
Check whether there
is voltage variance on
p
in 25 of U1.
check if bad solder exist on U1 and
peripheral components
Replace the bad spare parts
Check whether pins of U1 and
peripheral components are
badly soldered, defected
Check Q5, Q7
whether in good
condition
Yes
Yes
Yes
Go
Correct connection
Change U1 or the loader.
No
No
Yes
Check laser voltage (2.4V) output
on L10, if pin18 of U1 is at low
level.
Trouble shooting chart
No