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DVD PLAYER
Model:
DVR4015VSS
SERVICE MANUAL
www.akai.ru
Safety information ----------------------------3 Attachment 3---------------------------32
1 General guid-----------------------------3 Component list
2 Low zeta potential leaking inspection ---3 1 AV output board component list --------33
3 High zeta potential leaking inspection --3 2 Decoder board component list ----------36
3 Control board component list -----------39
Device avoiding ES(Electric Susceptible)
Influence of ESD (Electric Susceptible
Discharge)-----------------------------------------3
Technical specification ----------------------4
Mechanical diagram ------------------ ------8
Mechanical Parts------------------------- 9
Packing and accessories ---------------------10
Disassemble and assemble-------------------11
1 Take out disc from trouble player ----11
2 PCB position ------------------------11
Disassemble and assemble parts of the unit
-----------------------------------------------12
1 Can open the tray by electricity -----12
2 Can not open the tray by electricity --12
3 Assemble the unit -------------------12
Attachment 1----------------- 13
Block Diagram/Electric circuit diagram
1 Block diagram ------------------------14
2 Electric circuit diagram ---------------15
3 Decoder board diagram ---------------16
4 AV output board diagram -------------20
5 Control board diagram ----------------23
Attachment 2------------------24
PCB Diagram
1 Upper decode board PCB diagram ----25
2 Lower decoder board PCB diagram ---26
3 AV output board PCB diagram --------27
4 Control board PCB diagram -----30
SAFETY INFORMATION Device avoiding ES(Electric Susceptible)
Influence of ESD (Electric Susceptible Discharge
General guide
1.Observe the original circuit during maintenance. if short exceeded the restrained figure, electric shock should be
circuit occurs, change the over-hot or damaged components. possibly suffered. Do maintain the unit and inspect once
2.Observe all the protective device after maintenance, such more before return to the user.
as whether the shielding cover or paper is assembled well. Device avoiding ES influence of ESD.
3.To avoid electric shock, please inspect electricity leakage Some solid semi-conductor devices are easy to be
after maintenance damaged by static electricity. These devices are generally
Low zeta potential leaking inspection called ES device. The typical devices are IC, field effect
1.Take out AC cord and connect a piece of wire between two component and semi-conductor laser diode.
legs of the outlet. The following technology helps to abate the danger of
ESD on body before handle any semi-conductor or
2.Use Gear R x 10K of the voltmeter to measure the spares
semi-conductor component. Or wear the ESD bangle availed
on AC outlet and exposed metallic part with short circuit.
from the market to eliminate the threaten of static electricity
The resistance between screw cap, control shaft should be on human body.
unlimited.
2.Put the electronic parts with ES device on the surface of
AC voltage table conductor such as aluminium foil after take them out in order
creepage checking circuit
to protect static electricity from accumulation and explosion.
3.Solder or disassemble ES device through iron connecting
the earth.
4. Utilize device only anti-static electricity to disassemble
uF
soldering tin. Non-anti static electricity device (ESC
to have discover metal cold water
protection) will release ES that damage ES device.
accessory of equipment canalearthing
5.Do not use chemical volatile releasing static electricity
that leads to damage ES device
picture 1 6. Unless preparation for pre-assembling has been made, do
High zeta potential leakage inspection not take out the ES device to be changed from the protective
.As illustrated 1, Connect Resistor with 1.5K, 10W and packing ( most of the changed ES devices are packed
capacitor 0.15 between exposed metallic part and device of
together with anti-static electrical foam or similar electric
fine connection to the earth (water pipe etc.).
material, besides, countermeasures for down-lead short
2.Plug-in AC cord directly to AC outlet. Do not inspect with
shield adaptor. circuit are taken.).
3.Utilize 1000 or more sensitive voltmeter to measure 7. Protective material should connect the model or the circuit
alternating voltage. component to be assembled in it before taking out the
4.Turn back the AC plug-in from AC outlet then iterate the protective material from the ES device.
Note: do not bear electricity to the model or the circuit, and
inspection as above.
5.Inspect the voltage of the resistor between other exposed pay attention to all the other safety information.
metallic parts and the earth with the same way. 8. When disassembling and replacing the ES device, try to
reduce body movement (Or, the movement of legs, the
6. The voltage must not be over than 0.75Vrms at any points
friction of fibrous of clothes, or elevating the legs from the
on the resistor. Electric leakage should not be over 0.5mA
floor will generate static electricity ESD, causing damage to
when processing high voltage leakage testing through the ES device.).
1
Technical specification
DVD Electric gudideline 1Video parts
NO. Test items Test point Performance request Units Remake
1 video 1.0