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DVD Player DVP3120(K)
DVP3120/05/12/51/55/94/75
DVP3120K/55
Service
Service Manual
TABLE OF CONTENTS
Page
. Technical Specifications.............................................................1-2
. Safety Instruction, Warning & Notes............................................1-3
. Mechanical and Dismantling Instructions.........................................2-1
. Region Code, Software Version& Upgrades....................................3-1
. Trouble Shooting Chart............................................................4-1
. Wiring Diagram.......................................................................5-1
. Electrical Diagrams and Print-layouts...........................................6-1
. Set Mechanical Exploded View & Electrical Part list........................7-1
. Electrical Parts List...................................................................8-1
. Revision List...........................................................................9-1
©Copyright 2007 Philips Consumer Electronics B.V. Eindhoven, The Netherlands CLASS 1
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
LASER PRODUCT
without the prior permission of Philips.
GB
3139 785 324XX
PHILIPS
Published by TCL-HY 0707 Service Audio Printed in The Netherlands Subject to modification
Version 1.0
1-2
Technical Specifications
TV standard (PAL/50Hz) (NTSC/60Hz) Audio performance
Number of lines 625 525
DA converter 24bits, 192KHz
Playback Multi standard (PAL/NTSC)
DVD fs 96kHz 4Hz----44kHz
fs 48kHz 4Hz----22kHz
SVCD fs 48kHz 4Hz----22kHz
Video performance
fs 44.1kHz 4Hz----20kHz
Video DAC 12 bit, 108MHz CD/ VCD fs 44.1kHz 4Hz----20kHz
YPbPr 0.7Vpp ---- 75 ohm Signal-Noise (1kHz) >90dB
Video output 1Vpp ----- 75 ohm Dynamic Range (1kHz) >80dB
RGB SCART 0.7Vpp ---- 75 ohm (For Europe Version ) Cross talk (1kHz) >70dB
£¨
£©
Distortion/Noise (1kHz) >65dB
MPEG MP3 MPEG Audio L3
Video format
Digital Compression MPEG 2 for DVD,SVCD
MPEG 1 for VCD
Connections
Scart Output Euroconnector (For Europe version)
DVD 50Hz 60Hz YPbPr output Cinch 3x
Horiz resolution 720 pixels 720 pixels Video output Cinch( yellow)
Vertical resolution 576lines 480 lines Audio output (L+R ) Cinch (white/red)
Digital output 1 coaxial
IEC60958 for CDDA/ LPCM
VCD 50Hz 60Hz IEC61937 for MPEG1/2,
Horiz. resolution 352 pixels 352 pixels Dolby Digital
Vertical resolution 288lines 240 lines
Cabinet
Audio format Dimensions (w X h X d) 360 x 37 x 235 mm
Digital MPEG/AC-3/ Compressed 360 x 37 x 209 mm (For DVP3120 /05/12/55)
PCM Digital Weight Approximately 2 kg
16, 20, 24bits
fs, 44.1, 48, 96kHz
MP3(ISO 9660) 96,112,128,256kbps Power consumption
& variable bit rate fs,32,
44.1,48 kHz Power supply Rating 110V-240V;
50/60HZ
Analogue Sound Stereo Power consumption <10W
Dolby surround compatible downmix from Dolby Digital multi-channel Power consumption in standby mode <1W
sound
Specifications subject to change without prior notice.
1-3
Safety instruction, Warning & Notes
Safety instruction
1. General safety 2.Laser safety
Safety regulations require that during a repair:
This unit employs a laser. Only qualified service personnel
. Connect the unit to the mains via an isolation transformer.
may remove the cover, or attempt to service this device
. Replace safety components indicated by the symbol ,
(due to possible eye injury).
only by components identical to the original ones. Any
Laser device unit
other component substitution (other than original type)
Type : Semiconductor laser GaAlAs
may increase risk of fire or electrical shock hazard.
Wavelength : 650nm (DVD)
: 780nm (VCD/CD)
Safety regulations require that after a repair, you must
Output power : 7mW (DVD)
return the unit in its original condition. Pay, in particular,
: 10mW (DVD /CD)
attention to the following points:
Beam divergence: 60 degree
. Route the wires/cables correctly, and fix them with the
Note: Use of controls or adjustments or performance of
mounted cable clamps.
procedure other than those specified herein, may result in
. Check the insulation of the mains lead for external
hazardous radiation exposure. Avoid direct exposure to
damage.
beam.
. 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.
1-4
Warning
1.General 2. Laser
. All ICs and many other semiconductors are susceptible to . The use of optical instruments with this product, will
electrostatic discharges (ESD). Careless handing during increase eye hazard.
repair can reduce life drastically. Make sure that, during . Only qualified service personnel may remove the cover
repair, you are at the same potential as the mass of the or attempt to service this device, due to possible eye
set by a wristband with resistance. Keep components and injury.
tools at this same potential. Available ESD protection . Repair handing should take place as much as possible
equipment: with a disc loaded inside the player.
1) Complete kit ESD3 (small tablemat, wristband, . Text below is placed inside the unit, on the laser cover
connection box, extension cable and earth cable) shield:
4822 310 10671.
2) Wristband tester 4822 344 13999.
. Be careful during measurements in the live voltage CAUTION: VISIBLE AND INVISIBLE LASER
section. The primary side of the power supply , including RADIATION WHEN OPEN, AVOID EXPOSURE
the heat sink, carries live mains voltage when you TO BEAM.
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 Notes: Manufactured under licence from Dolby
service the player. Service personnel must take Laboratories. The double-D symbol is trademarks of Dolby
precautions to prevent touching this area or components Laboratories, Inc. All rights reserved.
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".
1-5
Notes
Lead-Free requirement for service
INDENTIFICATION: · Use only original spare-parts listed in the
Regardless of special logo (not always indicated) Service-Manuals. Not listed standard-material
(commodities) has to be purchased at external
One must treat all sets from 1.1.2005 onwards, according
next rules. companies.
· Special information for BGA-ICs:
Important note: In fact also products a little older can also
- always use the 12nc-recognizable soldering
be treated in this way as long as you avoid mixing
solder-alloys (leaded/ lead-free). So best to always use temperature profile of the specific BGA (for
SAC305 and the higher temperatures belong to this. de-soldering always use highest lead-free
temperature profile, in case of doubt)
Due to lead-free technology some rules have to be
respected by the workshop during a repair: - lead free BGA-ICs will be delivered in so-called
· Use only lead-free solder alloy Philips SAC305 with `dry-packaging' (sealed pack including a silica gel
order code 0622 149 00106. If lead-free solder-paste is pack) to protect the IC against moisture. After
required, please contact the manufacturer of your opening, dependent of MSL-level seen on
solder-equipment. In general use of solder-paste within indicator-label in the bag, the BGA-IC possibly
workshops should be avoided because paste is not easy still has to be baked dry. This will be
to store and to handle. communicated via AYS-website.
· Use only adequate solder tools applicable for lead-free Do not re-use BGAs at all.
solder alloy. The solder tool must be able · For sets produced before 1.1.2005, containing
o To reach at least a solder-temperature of 400°C, leaded soldering-tin and components, all needed
o To stabilize the adjusted temperature at the spare-parts will be available till the end of the
solder-tip service-period. For repair of such sets nothing
o To exchange solder-tips for different applications. changes.
· Adjust your solder tool so that a temperature around · On our website:
360°C 380°C is reached and stabilized at the solder www.atyourservice.ce.Philips.com
joint. Heating-time of the solder-joint should not exceed You find more information to:
~ 4 sec. Avoid temperatures above 400°C otherwise BGA-de-/soldering (+ baking instructions)
wear-out of tips will rise drastically and flux-fluid will be Heating-profiles of BGAs and other ICs used in
destroyed. To avoid wear-out of tips switch off un-used Philips-sets
equipment, or reduce heat.
· Mix of lead-free solder alloy / parts with leaded solder You will find this and more technical information
alloy / parts is possible but PHILIPS recommends within the "magazine", chapter "workshop news".
strongly to avoid mixed For additional questions please contact your local
solder alloy types (leaded and lead-free). If one cannot repair-helpdesk.
avoid, clean carefully the
solder-joint from old solder alloy and re-solder with new
solder alloy (SAC305).
2-1
Mechanical and Dismantling Instructions
Dismantling Instruction
The following guideline is a general instruction for how to dismantle the player, Detailed operation done according the set unit.
Step1: Remove 5 screws around the Top Cover, then remove the Top Cover (Figure 1).
Figure 1
Step2: If it is necessary to dismantle Loader or Front Panel, It should be remove the Front door assembly first. (Figure 2)
Note: Make sure to operate gently otherwise the guider would be damaged.
Figure 2
Please kindly note that dismantle
the front door assembly carefully
to avoid damage tray and the front
door assembly.
2-2
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.
Push the guider until the tray out.
Make sure to operate gently to
Figure 3
avoid damage happening.
Step4: Dismantling Loader, disconnect the 3 connectors aiming in the below figure, and remove 1 screw around the
Loader. (Figure 4)
CON 1
CON 2
CON 3
Figure 4
2-3
Mechanical and Dismantling Instructions
Dismantling Instruction
Step5: Dismantling Front Panel, disconnect the 3 connector, then release the snaps on the both sides of Front Panel and bottom
cabinet , then gently pull the Panel out from the set. (Figure 5 & 6 & 7)
CON 4
Figure 5
Snap 1
Snap 2
Figure 6 Figure 7
2-4
Mechanical and Dismantling Instructions
Dismantling Instruction
Step6: Dismantling Main Board, first disconnect the 1 connector, then remove 4 screws to remove the Main board. (Figure 8)
CON 6
Figure 8
Step7: Remove the 2 screws on Power Board to dismantle the Power Board. (Figure 9)
Figure 9
3-1
Software upgrade
Preparation to upgrade software B. Read out the software versions to confirm upgrading
1) Start the CD Burning software and create a new CD 1) Power on the set and press button on the
project (Data Disc) with the following setting: remote control.
Label: DVP312X (No need the label name) 2) Press<1><3><7><9>button to check the software
File Name: DVPXXXX_XX.BIN information.
Power on the set and open the tray, then press <5><5> The software version and other information are display
to check the File Name. on the TV screen as follows:
Note: It is required capital letter for the File System Version XX.XX.XX.XX (Main version)
name SUB-VER XX.XX.XX.XX (software version of
2) Burn the data onto a blank CDR application software)
8032 XX.XX.XX.XX
Servo XX.XX.XX.XX (software version of
Servo)
A. Procedure for software upgrade: RISC XX.XX.XX.XX
1) Power on the set and insert the prepared Upgrade DSP XX.XX.XX.XX
CDR. Region Code X
2) The set will starts reading disc & response with the
following display TV screen:
Upgrade File DETECTED
Upgrade?
Caution: The set must not be power off during
Press Play TO START.
upgrading, Otherwise the Main board will be
3) Press button to confirm, then screen will display :
damaged entirely.
Files coping...
UPGRADING...
4) The upgraded disc will automatically out when files
coping complete, then take out the disc.
5) About 1 minute later, the tray will automatically close
when upgrading complete.
4-1 Trouble shooting chart
Spindle motor does not move Remark: Trouble shooting chart for
DVP3120/51/55/94/75, DVP3120K/55
Motor no move
Go
Check the FFC connection No
Correct connection
between 24P and the loader.
Yes
Check whether "RFA5V" No Check the RFA5V power
(+5V) voltage is normal. supply
Yes
Check whether laser voltage No
(2V for VCD & 2.2V for DVD) Check/Replace Q7¡¢ Q8.
on Collector of Q7 and Q8
Yes
1. Whether voltage on pin 44 of U1
varies between 0 and 3.3V (3.3V No
for VCD and 0V for DVD), Check/ Replace U1.
2. Whether peripheral components
are eroded or badly soldered.
Yes
1. Check U1 42pin FOO signals
No
Have no to focus 2.If there are F+, F-, T+ and T-
signals output from U2.
Yes
Check/Replace the loader
4-2 Trouble shooting chart
The power can not be on or off Remark: Trouble shooting chart for
DVP3120/51/55/94/75, DVP3120K/55
The power can't be
on or off
Go
Check the power supply No
Repair the power board
on the power board is
normal.
Yes
Check if the CON301 on the front
No
Yes
board to CN5 on the decoder board Check/Correct connection
is in good contact.
Yes
Whether the connection No
Correct the connection
to K301 is broken.
Yes
Whether there is 0V and No
3.3V voltage difference on Replace U1.
Pin 100 PCON of U1.
Yes
4-3 Trouble shooting chart
All output voltages on the power board is 0V or deviated. Remark: Trouble shooting chart for
DVP3120/51/55/94/75, DVP3120K/55
All output voltages on
the power board is 0V or
deviated
Yes
Check whether Yes
Replace F1
F1 is blown
No
Check whether No
Replace C4 if D1, D2, D3, D4
there is 300V on C4. are normal.
Yes
Check whether 100KHz No
oscillating signal on Check/ replace U1.
Pin6 of U1
U1(PIN 3 - RC waveform) U1(PIN 8 - Drain waveform)
Yes
Check if +5V, +12V, -12V No
Check whether U2 are eroded.
are short.
Yes
Check whether the components in the
short-circuit voltage are defected or eroded.
4-4 Trouble shooting chart
Disc cannot be read. Remark: Trouble shooting chart for
DVP3120/51/55/94/75, DVP3120K/55
Disc cannot be read.
Yes
Check the FFC connection No
Check the loaded circuit
between 24P and the loader.
Yes
1.Check voltage on pin 44 of U1
Check whether there is varies between 0 and 3.3V:
No
laser voltage (1.9V for VCD 3.3V for VCD
and 2.3V for DVD) on 0V for DVD
Collector of Q7 &Q8 2.Check whether peripheral
components are eroded or defect
Yes
Check U1, U2, and No
peripheral components are Re-solder or replace the defective parts
eroded or badly soldered.
Yes
Check if there is RFO signal
on pin17 of CN3. (The No
Check U1 and peripheral components
normal RFO signal is a clear
reticulated wave)
Yes
Check the connection No
Correct connection
between U1
Yes
Replace U1 or loader.
4-5 Trouble shooting chart
Only DVD disc or only disc except DVD can be played Remark: Trouble shooting chart for
DVP3120/51/55/94/75, DVP3120K/55
Only DVD disc, or only disc
except DVD can be Played.
Go
Check the FFC No
Check the loaded circuit
connection between
24pin and the loader.
Yes
Check laser voltage (2V)
No
output on Collector of Q7, if Check the solder status on U1 and
pin 22 of U1 is at low level. peripheral components
Yes
Check whether there No check if bad solder exist on U1 and
is voltage variance on peripheral components
pin 22 of U1.
Yes
Check whether pin 1 to pin38 No
of U1 and peripheral
components are badly Replace the bad spare parts
soldered, defected
Yes
Check Q4, Q5, Q6 No
whether in good Correct connection
condition
Yes
Change U2 or the loader.
4-6 Trouble shooting chart
Distorted audio and loud noise Remark: Trouble shooting chart for
DVP3120/51/55/94/75, DVP3120K/55
Distorted audio and
loud noise
Yes
Check he power supply
voltages +12V and -12V No
to the operation amplifying Replace R9 and R14
L7 andR19 are normal
Yes
Check whether the No
muting transistors Q12, Replace Q12, Q15
Q15, are normal
Yes
No
Checking the U1 leads No
the feet has no to break Correct connection
to open
Yes
Check whether the U7 No
or U1 power supply Check U1, U7
normal
Yes
Replace U1, U7
4-7 Trouble shooting chart
Abnormal color of video picture Remark: Trouble shooting chart for
DVP3120/51/55/94/75, DVP3120K/55
Abnormal color of
video picture
Yes
No
Check whether the 27MHz Check Y1, R19, C32 and C33
output signal is normal.
Yes
Check whether the 3.3V
No Check other of power supply electric
and 2.5V power supply
voltages on the decoder circuit
board are normal.
Yes
Check whether the
No
video filter network Correct the connection
circuit is normal.
Yes
Change U1
4-8 Trouble shooting chart
Remote reception is insensitive or fails. Remark: Trouble shooting chart for
DVP3120/51/55/94/75, DVP3120K/55
Remote reception is
insensitive or fails.
Go
Check if the remote No Check battery
control works properly.
Yes
Check if the power No
supply voltage to the Check R66¡¢ C68
remote censor is normal
Yes
Use an oscilloscope to check
if there is output waveform No
from the first pin IR of the REM1(PIN 3 - RC waveform)
remote censor after pressing
button on the remote control.
Yes
Check if there is IR Yes
signal on pin 106 of Change U1
U12
IR waveform
No
Correct connection
4-9 Trouble shooting chart
No video picture, no sound. Remark: Trouble shooting chart for
DVP3120/51/55/94/75, DVP3120K/55
No video picture,
no sound.
Go
Check whether all the No
voltages from the power
Check the loaded circuit
board to the decoder board
are normal. CVBS(R85 point) waveform
Yes
Check if the reset circuit consisting
No
of CE17, R47, D2,L30 is normal (at
Change CE17, R47,
a high level for tens of milliseconds,
then constantly at 0V).
Yes 27M waveform
No Crystal oscillator Y1 and
Check whether there is
peripheral components
27MHz signal output.
are defected or eroded.
Yes
Check if there is 115MHz No Check whether
short-circuit or bad
signal output on L7.
solder on U3, U6
SDRAM(L7 SDCLK) waveform
Yes No
Yes
Reconnect the component in
short-circuit
Check U4.
4-10 Trouble shooting chart
No display on LED, and buttons do not work Remark: Trouble shooting chart for
DVP3120/51/55/94/75, DVP3120K/55
No display on LED, and
buttons do not work
Yes
Check whether there is
No
correct contact
between CON301 and
Correct connection
CN5
Yes
Check VCC(+5v) Fix power supply board top
No
voltage on the power a power supply for should
and front board electric circuit
Yes
Check there are CS,
DATA and CLK signals on No Check the U1's pin 92,94,95 arrive
CON301 on the front the CN5 connect condition
board.
CN5 (PIN 2 CLK) CN5 (PIN4 DOUT)
Yes
1.Check whether bad solder exists
on U301 and pins of LED,
2.Check whether the circuit No
connected to K302, K303, K304 Correct connection
and K301 is broken,
3.Check whether R300, R301 and
R302 are open-circuit.
Yes
Replace U301 or LED
4-11 Trouble shooting chart
Spindle motor does not move Remark: Trouble shooting chart for
DVP3120/05/12
Motor no move
Go
Check the FFC connection No
Correct connection
between 24P and the loader.
Yes
Check whether "RFA5V" No Check the RFA5V power
(+5V) voltage is normal. supply
Yes
Check whether laser voltage
No Check/Replace Q7¡¢ Q8.
(2.3V for DVD & 1.9V for CD)
on Collector of Q7 and Q8
Yes
1.Whether voltage on pin 129 of
U1 varies between 0 and 3.3V No
(3.3V for CD and 0V for DVD), Check/ Replace U1.
2.Whether peripheral components
are eroded or badly soldered.
Yes
1. Check U1 42pin FOO signals
No 2.If there are F+, F-, T+ and T-
Have no focus
signals output from U2.
Yes FOO waveform
Check/Replace the loader
4-12 Trouble shooting chart
The power can not be on or off Remark: Trouble shooting chart for
DVP3120/05/12
The power can't be
on or off
Go
Check the power supply No
Repair the power board
on the power board is
normal.
Yes
Check if the CON301 on the front No
Yes
board to CN6 on the decoder Check/Correct connection
board is in good contact.
Yes
Whether the connection No
Correct the connection
to K301 is broken.
Yes
Whether there is 0V and No
3.3V voltage difference on Replace U1.
Pin 100 PCON of U1.
Yes
4-13 Trouble shooting chart
All output voltages on the power board is 0V or deviated. Remark: Trouble shooting chart for
DVP3120/05/12
All output voltages on
the power board is 0V or
deviated
Yes
Check whether Yes
Replace F1
F1 is blown
No
Check whether No Replace C1&C2 if D1, D2, D3,
there is 300V on C1 D4 are normal.
Yes
Check whether 100KHz No
oscillating signal on Check/ replace U1.
Pin6 of U1
U1(PIN 3 - RC waveform) U1(PIN 8 - Drain waveform)
Yes
Check if +5V, , +12V and No Check whether U1 are eroded.
-12V are short.
Yes
Check whether the components in the
short-circuit voltage are defected or eroded.
4-14 Trouble shooting chart
Disc cannot be read. Remark: Trouble shooting chart for
DVP3120/05/12
Disc cannot be read.
Yes
Check the FFC connection No
Check the loaded circuit
between 24P and the loader.
Yes
1.Check voltage on pin 44 of U1
Check whether there is varies between 0 and 3.3V:
laser voltage (2.3V for DVD No 3.3V for CD
and 1.9V for CD) on 0V for DVD
Collector of Q7 &Q8 2.Check whether peripheral
components are eroded or defect
Yes
Check U1, U2, and No
peripheral components are
Re-solder or replace the defective parts
eroded or badly soldered.
Yes
Check if there is RFO signal
No
on pin17 of CN3. (The Check U1 and peripheral components
normal RFO signal is a clear
reticulated wave)
Yes
No
Check the connection Correct connection
between U1
Yes
Replace U1 or loader.
4-15 Trouble shooting chart
Only DVD disc or only disc except DVD can be played Remark: Trouble shooting chart for
DVP3120/05/12
Only DVD disc, or only disc
except DVD can be Played.
Go
Check the FFC No Check the loaded circuit
connection between
24pin and the loader.
Yes
Check laser voltage (2.3V)
No Check the solder status on U1 and
output on Collector of Q7, if
peripheral components
pin22 of U1is at low level.
Yes
Check whether there No
check if bad solder exist on U1 and
is voltage variance on
pin 23 of U1. peripheral components
Yes
Check whether pins of U1
and peripheral No Replace the bad spare parts
components are badly
soldered, defected
Yes
Check Q7 whether No
in good condition Correct connection
Yes
Change U1 or the loader.
4-16 Trouble shooting chart
No display on LED, and buttons do not work Remark: Trouble shooting chart for
DVP3120/05/12
No display on LED, and
buttons do not work
Yes
Check whether there is
No
correct contact
between CON301 and
Correct connection
CN6
Yes
Check VCC(+5v) No Fix power supply board top
voltage on the power a power supply for should
and front board electric circuit
Yes
Check there are CS, DATA No Check the U1's pin 92,94,95 arrive
and CLK signals on CON301
the CN6 connect condition
on the front board.
CN6 (PIN 4 CLK) CN6 (PIN6 DOUT)
Yes
1.Check whether bad solder exists
on U301 and pins of LED,
2.Check whether the circuit
No
connected to K302, K303, K304 and Correct connection
K301 is broken,
3.Check whether R300, R301 and
R302 are open-circuit.
Yes
Replace U301 or LED
4-17 Trouble shooting chart
istorted audio and loud noise Remark: Trouble shooting chart for
DVP3120/05/12
Distorted audio and
loud noise
Yes
Check the power supply
voltages +12V and -12V No
to the decode board are Correct connection
normal.
Yes
Check whether the No
muting transistor Replace Q17£¬ Q20
Q17,Q20, are normal
Yes
Checking the U8 leads No
the feet has no to break Correct connection
to open
Yes
Replace U1
if the clock signal AOUT0, No
ABCK and ALRCK output
by U1 are normal
SACLK waveform SBCLK waveform SSLRCK waveform
Yes
Check whether the U1 No
or U9 powersupply Check U9
normal
Yes
Replace U1 or U9
4-18 Trouble shooting chart
Abnormal color of video picture Remark: Trouble shooting chart for
DVP3120/05/12
Abnormal color of
video picture
Yes
Check whether the
No
27MHz output signal is
Check Y1, R17, C32 and C33
normal.
Yes
Check whether the 3.3V
and 1.8V power supply No Check other of power supply electric
voltages on the decoder circuit
board are normal.
Yes
Check whether the
No
video filter network Correct the connection
circuit is normal.
Yes
No
Check if the video signals on Pin change U1
175,179,181,182 of U1 are normal
4-19 Trouble shooting chart
Remote reception is insensitive or fails. Remark: Trouble shooting chart for
DVP3120/05/12
Remote reception is
insensitive or fails.
Go
Check if the remote No Check battery
control works properly.
Yes
Check if the power No
supply voltage to the Check R315¡¢ C315
remote censor is normal
Yes
Use an oscilloscope to check
if there is output waveform No
from the first pin IR of the REM301(PIN3 - RC waveform)
remote censor after pressing
button on the remote control.
Yes
Check if there is IR Yes
Change U1
signal on pin 106 of U1
IR waveform
No
Correct connection
4-20 Trouble shooting chart
No video picture, no sound. Remark: Trouble shooting chart for
DVP3120/05/12
No video picture,
no sound.
Go
Check whether all the voltages No
from the power board to the Check the loaded circuit
decoder board are normal.
CVBS(R76 point) waveform
Yes
Check if the reset circuit No
consisting ofCE17, D2 Change CE17 D2 L25 R43,
L25 and R43 is normal
Yes 27Mhz waveform
Crystal oscillator Y1 and
Check whether there is No
peripheral components
27MHz signal output.
are defected or eroded.
Yes
Check if there is 135MHz No Check whether
short-circuit or bad
signal output on L7.
solder on U4,U7
SDRAM(L7 PCLK) waveform
Yes
No
Check if short-circuit and No
Check U1.
bad solder exist on Pin
175
Yes
Yes
Reconnect the component in
5-1 5-1
5 4 3 2 1
DVP3120(K)/XX WIRING DIAGRAM
AC IN
D CN8 CN6 PR Y D
L&R COAX
CON1
Pb CVBS
AUDIO
AMP&LPF 1 1
1
GND_LD VIDEO
DVD_LD +5V
NC(C-GND) LPF&DRIVE
OPU_HFM(-RFA5V) +5V
MD(C-GND)
CD-LD GND
VR_DVD
VR_CD GND
NC(C-GND) POWER
RF_E +12V
SUPPLY
(TCL)TDM-1 + KHM313
VCC(-RFA5V)
VC CN1 GND
GND
RF_F -12V
DVD LOADER
RF_B CON2
RF_A
16M SDRAM
RF
C
CD/DVD U1 7 7
C
RF_D
RF_C
TACT- MTK1389D
TACT+
FACT+ CN3
TACT-
24 U6
1
SP-
SP+
AM5888S
HOMESW
DRIVER
GND
MOTOR
SL- KARAOKE A/D
SL+ CN2 CS5340 U11
6
1
LOAD- U2
LOAD+
OUTSW 8M/16M EEPROM
GND
INSW FLASH U3 U4
5
J1
B B
1 9 CN5 1 4 CN9
LED+5V
POWER_K
CLK
DATA
AGND
CS
IR
DV33
-12V
GND
MIC
+5V
GND