Panasonic DMR-EZ28P User manual

©2008 Matsushita Electric Industrial Co., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
Model No.DMR-EZ28P
DMR-EZ28PC
Vol. 1
Colour
(K).......................Black Type
DVD Recorder
ORDER NO.CHM0802003CE
B24

1 Safety Precaution 3
1.1. General guidelines 3
1.2. Caution for fuse replacement 3
2 Warning 4
2.1. Prevention of Electrostatic Discharge (ESD) to
Electrostatic Sensitive (ES) Devices 4
2.2. Precaution of Laser Diode 5
2.3. Service caution based on legal restrictions 6
3 Service Navigation 7
3.1. Service Information 7
3.2. Caution for DivX 7
4 Specifications 8
5 Location of Controls and Components 10
6 Operation Instructions 12
6.1. Taking out the Disc from DVD-Drive Unit when the Disc
cannot be ejected by OPEN/CLOSE button 12
7 Service Mode 15
7.1. Self-Diagnosis and Special Mode Setting 15
8 Service Fixture & Tools 25
9 Assembling and Disassembling 26
9.1. Disassembly Flow Chart 26
9.2. P.C.B. Positions 26
9.3. Top cover 27
9.4. Front Panel, Front (R) P.C.B and Front (L) P.C.B. 27
9.5. DV Jack and SD/USB P.C.B. 28
9.6. Rear Panel 28
9.7. Digital P.C.B. 29
9.8. DVD Drive 29
9.9. Main P.C.B. and SW P.C.B. 30
10 Measurements and Adjustments 31
10.1. Service Positions 31
10.2. Notice after replacing Digital P.C.B. 33
10.3. Caution for Replacing Parts 33
10.4. Standard Inspection Specifications after Making Repairs
34
11 Block Diagram 35
11.1. Power Supply Block Diagram 35
11.2. Analog Video Block Diagram 37
11.3. Analog Audio Block Diagram 38
11.4. Analog Timer Block Diagram 39
12 Schematic Diagram 41
12.1. Interconnection Schematic Diagram 41
12.2. Power Supply Section (Main P.C.B. (1/4)) Schematic
Diagram (A) 42
12.3. AV IO (1/4) Section (Main P.C.B. (2/4)) Schematic
Diagram (A) 44
12.4. AV IO (2/4) Section (Main P.C.B. (2/4)) Schematic
Diagram (A) 45
12.5. AV IO (3/4) Section (Main P.C.B. (2/4)) Schematic
Diagram (A) 46
12.6. AV IO (4/4) Section (Main P.C.B. (2/4)) Schematic
Diagram (A) 47
12.7. Tuner Section (Main P.C.B. (3/4)) Schematic Diagram
(TU) 49
12.8. Timer Section (Main P.C.B. (4/4)) Schematic Diagram (T)
50
12.9. DV Jack Schematic Diagram 52
12.10. SD/USB Schematic Diagram 53
12.11. SW Schematic Diagram 55
12.12. Front (L) Schematic Diagram 55
12.13. Front (R) Schematic Diagram 55
13 Printed Circuit Board 57
13.1. Main P.C.B. 57
13.2. Front (L) P.C.B. 62
13.3. Front (R) P.C.B. 62
13.4. DV Jack P.C.B. 63
13.5. SW P.C.B. 63
13.6. SD/USB P.C.B. 64
14 Appendix for Schematic Diagram 65
14.1. Voltage and Waveform Chart 65
14.2. Waveform Chart 67
14.3. Abbreviations 68
15 Parts and Exploded Views 70
15.1. Exploded Views 70
15.2. Replacement Parts List 72
CONTENTS
Page Page
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DMR-EZ28P / DMR-EZ28PC

1.1.1. Leakage current cold check
1. Unplug the AC cord and connect a jumper between the two
prongs on the plug.
2. Measure the resistance value, with an ohmmeter, between
the jumpered AC plug and each exposed metallic cabinet
part on the equipment such as screwheads, connectors,
control shafts, etc. When the exposed metallic part has a
return path to the chassis, the reading should be between
1MΩand 5.2MΩ.
When the exposed metal does not have a return path to the
chassis, the reading must be .
1.1.2. Leakage current hot check
(See Figure 1 .)
1. Plug the AC cord directly into the AC outlet. Do not use an
isolation transformer for this check.
2. Connect a 1.5kΩ, 10 watts resistor, in parallel with a 0.15µF
capacitors, between each exposed metallic part on the set
and a good earth ground such as a water pipe, as shown in
Figure 1.
3. Use an AC voltmeter, with 1000 ohms/volt or more
sensitivity, to measure the potential across the resistor.
4. Check each exposed metallic part, and measure the
voltage at each point.
5. Reverse the AC plug in the AC outlet and repeat each of the
above measurements.
6. The potential at any point should not exceed 0.75 volts
RMS. A leakage current tester (Simpson Model 229 or
equivalent) may be used to make the hot checks, leakage
current must not exceed 1/2 milliampere. In case a
measurement is outside of the limits specified, there is a
possibility of a shock hazard, and the equipment should be
repaired and rechecked before it is returned to the
customer.
Figure 1
1 Safety Precaution
1.1. General guidelines
1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or
damaged by the short circuit.
2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly
installed.
3. After servicing, make the following leakage current checks to prevent the customer from being exposed to shock hazards.
1.2. Caution for fuse replacement
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DMR-EZ28P / DMR-EZ28PC

2 Warning
2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatic Sensitive
(ES) Devices
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called
Electrostatic Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistor-sand
semiconductor "chip" components. The following techniques should be used to help reduce the incidence of component damage
caused by electrostatic discharge (ESD).
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your
body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap,
which should be removed for potential shock reasons prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as
aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
4. Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static (ESD protected)" can
generate electrical charge sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most
replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable
conductive material).
7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material
to the chassis or circuit assembly into which the device will be installed.
Caution
Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the
brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient
to damage an ES device).
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DMR-EZ28P / DMR-EZ28PC

2.2. Precaution of Laser Diode
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DMR-EZ28P / DMR-EZ28PC

2.3. Service caution based on legal restrictions
2.3.1. General description about Lead Free Solder (PbF)
The lead free solder has been used in the mounting process of all electrical components on the printed circuit boards used for this
equipment in considering the globally environmental conservation.
The normal solder is the alloy of tin (Sn) and lead (Pb). On the other hand, the lead free solder is the alloy mainly consists of tin
(Sn), silver (Ag) and Copper (Cu), and the melting point of the lead free solder is higher approx.30 degrees C (86°F) more than that
of the normal solder.
Definition of PCB Lead Free Solder being used
The letter of “PbF” is printed either foil side or components side on the PCB using the lead free solder.
(See right figure)
Service caution for repair work using Lead Free Solder (PbF)
· The lead free solder has to be used when repairing the equipment for which the lead free solder is used.
(Definition: The letter of “PbF” is printed on the PCB using the lead free solder.)
· To put lead free solder, it should be well molten and mixed with the original lead free solder.
· Remove the remaining lead free solder on the PCB cleanly for soldering of the new IC.
· Since the melting point of the lead free solder is higher than that of the normal lead solder, it takes the longer time to melt
the lead free solder.
· Use the soldering iron (more than 70W) equipped with the temperature control after setting the temperature at 350±30
degrees C (662±86°F).
Recommended Lead Free Solder (Service Parts Route.)
· The following 3 types of lead free solder are available through the service parts route.
RFKZ03D01K-----------(0.3mm 100g Reel)
RFKZ06D01K-----------(0.6mm 100g Reel)
RFKZ10D01K-----------(1.0mm 100g Reel)
Note
* Ingredient: tin (Sn), 96.5%, silver (Ag) 3.0%, Copper (Cu) 0.5%, Cobalt (Co) / Germanium (Ge) 0.1 to 0.3%
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DMR-EZ28P / DMR-EZ28PC

3 Service Navigation
3.1. Service Information
3.2. Caution for DivX
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DMR-EZ28P / DMR-EZ28PC

4 Specifications
8
DMR-EZ28P / DMR-EZ28PC

9
DMR-EZ28P / DMR-EZ28PC

5 Location of Controls and Components
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DMR-EZ28P / DMR-EZ28PC

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DMR-EZ28P / DMR-EZ28PC

6 Operation Instructions
6.1. Taking out the Disc from DVD-Drive Unit when the Disc cannot be
ejected by OPEN/CLOSE button
6.1.1. Forcible Disc Eject
6.1.1.1. When the power can be turned off.
1. Turn off the power and press [STOP] [CH UP] keys on the front panel simultaneously for 5 seconds.
6.1.1.2. When the power can not be turned off.
1. Press [POWER] key on the front panel for over 10 seconds to turn off the power forcibly, and press [STOP] [CH UP] keys on
the front panel simultaneously for 5 seconds.
6.1.2. When the Forcible Disc Eject can not be done.
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DMR-EZ28P / DMR-EZ28PC

1. Turn off the power and pull out AC cord.
2. Remove the Top Case.
3. Put deck so that bottom can be seen.
4. Remove the Sheet of the bottom side.
5. Slide SLIDE CAM by Eject Pin (JZJ0484) or minus screw driver (small) in the direction of arrow to eject tray slightly.
6. Put deck upward, and push out Tray by Eject Pin (JZS0484) or minus screw driver (small).
7. It is necessory to paste the Sheet again after ejection of the disc. Refer to the illustration of the Step 4 and below figure about
the portion of pasting the Sheet.
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DMR-EZ28P / DMR-EZ28PC

Note:
Use the replacement parts (RMV0335) when the Sheet has not being stickability.
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DMR-EZ28P / DMR-EZ28PC

7 Service Mode
7.1. Self-Diagnosis and Special Mode Setting
7.1.1. Self-Diagnosis Functions
Self-Diagnosis Function provides information for errors to service personnel by “Self-Diagnosis Display” when any error has
occurred.
U**, H** and F** are stored in memory and held.
You can check latest error code by transmitting [0] [1] of Remote Controller in Service Mode.
Automatic Display on FL will be cancelled when the power is turned off or AC input is turned off during self-diagnosis display is ON.
Error Code Diagnosis contents Description Monitor Display Automatic FL display
U30 Remote control code error Display appears when main unit and remote
controller codes are not matched.
No display
“*” is remote controller code of the
main unit.
Display for 5 seconds.
U59 Abnormal inner temperature
detected
Display appears when the internal of drive
has abnormal temperature.
The power is turned off forcibly.
For 30 minutes after this, all key entries are
disabled. (Fan motor operates at the highest
speed for the first 5 minutes. For the
remaining 25 minutes, fan motor is also
stopped.) The event is saved in memory as
well.
No display
“U59 is displayed for 30 minutes.
U61 The unit is carrying out its
recovery process.
No display
U72 HDMI connection error
(communication error)
This error is displayed when there are any
communication problems with the unit and the
equipments (TV, amplifier etc.) connected to
the unit by HDMI. (or when there is a problem
with the HDMI cable) U72 display disappears when
error has been solved by Power
OFF/ON of connecting equipment
or by inserting/removing of HDMI
cable.
U73 HDMI connection error
(authentication error)
When authentication error occurs while the
equipments (TV, amplifier etc.) are connected
by HDMI. (or when there is a problem with the
HDMI cable)
No display
U73 display disappears when
error has been solved by Power
OFF/ON of connecting equipment
or by inserting/removing of HDMI
cable.
U76 Injustice disc error HDMI cannot output because you are
connected to a model that does not support
copyright protection.
No display
U88 The unit is carrying out its
recovery process.
No display
U99 Hang-up Displayed when communication error has
occurred between Main microprocessor and
Timer microprocessor.
No display
Displayed is left until the
[POWER] key is pressed.
F00 No error information Initial setting for error code in memory
(Error code Initialization is possible with error
code initialization and main unit initialization.)
No display No display
F58 Drive hardware error When drive unit error is detected, the event is
saved in memory.
No display No display
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DMR-EZ28P / DMR-EZ28PC

Error Code Diagnosis contents Description Monitor Display Automatic FL display
F34 Initialization error when main
microprocessor is started up
for program recording
When initialization error is detected after
starting up main microprocessor for program
recording, the power is turned off
automatically.
The event is saved in memory.
No display No display
HDMI HDMI connection check This unit is confirming that it is connected with
equipment compatible with HDAVI control.
No display
F74 HDIM Device Key
Communication error.
HDMI connection could not be authenticated
due to a transfer malfunction.
Factor of HDMI Device key-road failure
· When HDMI LSI is damaged.
· When the bus line of I2C doesn´t operate
normally.
· When device key information recorded is
damaged.
No display
F75 HDIM Device Key Information
error
HDMI connection could not be authenticated
due to an internal data malfunction.
Factor of HDMI Device key-road failure
· When HDMI LSI is damaged.
· When the bus line of I2C doesn´t operate
normally.
· When device key information recorded is
damaged.
No display
UNSUPPO
RT
Unsupported disc error *An unsupported format disc was played,
although the drive starts normally.
*The data format is not supported, although
the media type is supported.
*Exceptionally in case of the disc is dirty.
“This disc is
incompatible.”
Display for 5 seconds.
NO READ Disc read error *A disc is flawed or dirty.
*A poor quality failed to start.
*The track information could not be read.
“Cannot read.
Please check the
disc.”
HARD
ERR
Drive error The drive detected a hard error. “DVD drive error.” Display for 5 seconds.
No REC Recording is impossible [No REC] is displayed when recording is
impossible due to the defect, dirt or wound of
media.
No display
SELF
CHECK
Restoration operation Since the power cord fell out during a power
failure or operation, it is under restoration
operation.
*It will OK, if a display disappears
automatically. If a display does not disappear,
there is the possibility that defective Digital
P.C.B.
No display
“0” is displayed one by one.
PLEASE
WAIT
Unit is in termination process Unit is in termination process now.
“BYE” is displayed and power will be turned
off.
In case “Quick Start” of setup menu is ON, it
is displayed in restoration operation for AC
off.
No display
UNFORM
AT
Unformatted disc error You have inserted an unformatted DVD-RAM
or DVD-RW that is unformatted or recorded
on other equipment.
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DMR-EZ28P / DMR-EZ28PC

7.1.2. Special Modes Setting
Item FL display Key operation
Mode name Description Front Key
TEST Mode *All the main unit´s parameters are initialized. Press [STOP], [CH UP] and
[OPEN/CLOSE] keys
simultaneously for five seconds
when power is off.
Rating password The audiovisual level setting password is
initialized to “Level 8”.
No display When the power is on (E-E mode).
Open the tray, and press [REC] and
[PLAY] simultaneously for 5
seconds.
Service Mode Setting every kind of modes for servicing.
*Details are described in “7.1.3. Service
Mode at a glance”.
When the power is off, press [CH
UP], [OPEN/CLOSE] and [REC]
keys simultaneously for 5 seconds.
Forced disc eject Removing a disc that cannot be ejected.
The tray will open and unit will shift to P-off
mode.
*During Schedule Recording, Forced disc
eject is invalid.
*This command is not effective during "Child
lock" is ON.
While Demonstration Lock is being set, this
Forced disc eject function is not accepted.
The display before execution
leaves.
When the power is off, press
[STOP] and [CH UP] keys
simultaneously for 5 seconds.
Forced power-off When the power button is not effective while
power is ON, turn off the power forcibly.
*When Schedule Recording is ON, execute
“Forced Power-off” after releasing Schedule
Recording.
Display in P-off mode. Press [Power] key over than 10
seconds.
Aging Perform sequence of modes as * Aging
Description shown below continually.
Display following the then mode. Insert DVD-RAM disc.
When the power is ON, press
[STOP], [POWER] and
[OPEN/CLOSE] simultaneously for
over 5 seconds and less than 10
seconds.
NOTE1:
If Unit has not turned into Aging
mode by operations shown above,
execute TEST MODE once and re-
execute operation shown above.
(*All the main unit’s parameters are
initialized by TEST mode.)
NOTE2:
If the unit has hung-up because of
pressing keys for over 10 seconds,
once turn off the power, and re-
execute this command.
*When releasing Aging mode,
press [POWER] key, AC-OFF.
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DMR-EZ28P / DMR-EZ28PC

Item FL display Key operation
Mode name Description Front Key
Aging Contents (Example):
Demonstration
lock/unlock
Ejection of the disc is prohibited.
The lock setting is effective until unlocking the
tray and not released by “Main unit
initialization” of service mode.
*When lock the tray.
“LOCK” is displayed for 3 seconds.
When the power is on, press
[STOP] and [POWER] keys
simultaneously for 5 seconds.
*When unlock the tray.
“UNLOCK” is displayed for 3
seconds.
When the power is on, press
[STOP] and [POWER] keys
simultaneously for 5 seconds.
*When press OPEN/CLOSE key
while the tray being locked.
Display “LOCK” for 3 seconds.
Press [OPEN/CLOSE] key while the
tray being locked.
ATP Initialization ATP setting and all parameters (including
clock) are initialized, and the unit turns off
automatically.
It is same with display in stop mode. When the power is on (E-E mode),
press [CH UP] and [CH DOWN]
simultaneously for 5 seconds.
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DMR-EZ28P / DMR-EZ28PC

Item FL display Key operation
Mode name Description Front Key
Progressive initialization The progressive setting is initialized to
Interlace.
The display before execution
leaves.
When the power is on (E-E mode),
press [STOP] and [PLAY]
simultaneously for 5 seconds.
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DMR-EZ28P / DMR-EZ28PC

7.1.3. Service Modes at a glance
Service mode setting: While the power is off, press REC, CH UP and OPEN / CLOSE simultaneously for five seconds.
Item FL display Key operation
Mode name Description (Remote controller key)
Release Items Item of Service Mode executing is cancelled. Press [0] [0] or [Return] in service
mode.
ROM Version Display 1. Region code (displayed for 5 sec.)
2. Main firm version (displayed for 5 sec.)
3. Timer firm version (displayed for 5 sec.)
4. Drive firm version (displayed for 5 sec.)
5. ROM correction version (left displayed)
Press [0] [2] in service mode
White Picture Output White picture is output as component Output
from AV Decoder.
*White picture
(Saturation rate : 100%)
*It is enable to switch Interlace/Progressive by
“I/P switch: [1] [4]”
*Initial mode is “Interlace”. Press [1] [1] in service mode.
Switch Interlace/Progressive Press [1] [4] in White Picture Output
mode.
*I/P are switched alternately.
Magenta Picture Output Magenta picture is output with Component
Output from AV Decoder.
*Magenta picture
(Saturation rate: 100%)
*It is enable to switch Interlace/Progressive by
“I/P switch: [1] [4]”
*Initial mode is “Interlace”. Press [1] [2] in service mode.
Switch Interlace/Progressive Press [1] [4] in Magenta Picture
Output mode.
*I/P are switched alternately.
I/P Switch Switch Interlace and Progressive in EE mode.
*Initial setting is “Interlace”.
*This command is effective during executing
“White Picture Output”, “Magenta Picture
Output” mode.
Initial mode is Interlace
Switch Interlace/Progressive
Press [1] [4] in I/P Switch mode.
*I/P are switched alternately.
Audio Mute (XTMUTE) Check whether mute is applied normally by
the timer microprocessor.
Press [2] [1] in service mode.
Audio Mute (XDMUTE) Check whether mute is applied normally by
the Digital P.C.B..
Press [2] [2] in service mode.
Audio Pattern Output The audio pattern stored in the internal
memory is output
(Lch: 1kHz/-18dB)
(Rch: 400Hz/-18dB)
*Audio sound clock switching operation of
DAC can be confirmed by sub command [2]
[4].
Initial mode (Audio 48kHz) Press [2] [3] in service mode.
Audio 44.1kHz/48kHz switching Press [2] [4] in Audio Pattern Output
mode.
*48 kHz / 44.1 kHz are switched
alternately.
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DMR-EZ28P / DMR-EZ28PC