Panasonic DMR-EH55EG Service Manual

Name: Panasonic DMR-EH55EG
Brand: Panasonic
SKU: 8473443
Rating: 4 (1 reviews)

4 (1)

DMR-EH55EC DMR-EH55EG DMR-EH56EP

Vol. 1

Colour

(S).......................Silver Type

(K).......................Black Type

ORDER NO.DSD0603003CE

DVD Recorder

DMR-EH55EC / DMR-EH55EP / DMR-EH56EG

CONTENTS

Page Page

1 Safety Precaution 3

1.1. General guidelines

2 Warning

2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatic Sensitive (ES) Devices

2.2. Precaution of Laser Diode

2.3. Service caution based on legal restrictions

3 Service Navigation

3.1. Service Information

3.2. Caution for DivX

4 Specifications 5 New Feature

5.1. About DivX

6 Location of Controls and Components 7 Operation Instructions

7.1. Taking out the Disc from DVD-Drive Unit when the Disc cannot be ejected by OPEN/CLOSE button

8 Service Mode

8.1. Self-Diagnosis and Special Mode Setting

9 Service Fixture & Tools 10 Disassembly and Assembly Instructions

10.1. Disassembly Flow Chart

10.2. P.C.B. Positions

10.3. Top Case

10.4. Front Panel

10.5. SD Card P.C.B.

10.6. RAM/Digital P.C.B. Module

10.7. DV Jack P.C.B.

10.8. HDD

10.9. Rear Panel

10.10. Power P.C.B.

10.11. Main P.C.B. and Front (L) P.C.B.

10.12. Tuner P.C.B.

11 Meas u remen ts and Adjustments

11.1. Service Positions

11.2. Caution for Replacing Parts

11.3. Standard Inspection Specifications after Making Repairs

12 Blo ck Diagram

12.1. Power Supply Block Diagram

12.2. Analog Video Block Diagram

12.3. Analog Audio Block Diagram

12.4. Analog Timer Block Diagram

13 Sche matic Diagr am

15 17

27 28

28 28 29 29 29 29 31 31 32 33 34 34

35 39 41

43 45 46 47

4 5 6

7 7

13.1. Interconnection Schematic Diagram

13.2. Power Supply Schematic Diagram

13.3. Main Net (1/4) Section (Main P.C.B. (1/4)) Schematic Diagram (M)

13.4. Main Net (2/4) Section (Main P.C.B. (1/4)) Schematic Diagram (M)

13.5. Main Net (3/4) Section (Main P.C.B. (1/4)) Schematic Diagram (M)

13.6. Main Net (4/4) Section (Main P.C.B. (1/4)) Schematic Diagram (M)

13.7. A/V I/O (1/4) Section (Main P.C.B. (2/4)) Schematic Diagram (AV)

13.8. A/V I/O (2/4) Section (Main P.C.B. (2/4)) Schematic Diagram (AV)

13.9. A/V I/O (3/4) Section (Main P.C.B. (2/4)) Schematic Diagram (AV)

13.10. A/V I/O (4/4) Section (Main P.C.B. (2/4)) Schematic Diagram (AV)

13.11. Nicam Decoder Section (Main P.C.B. (3/4)) Schematic Diagram (DE)

13.12. Timer (1/4) Section (Main P.C.B. (4/4)) Schematic Diagram (T)

13.13. Timer (2/4) Section (Main P.C.B. (4/4)) Schematic Diagram (T)

13.14. Timer (3/4) Section (Main P.C.B. (4/4)) Schematic Diagram (T)

13.15. Timer (4/4) Section (Main P.C.B. (4/4)) Schematic Diagram (T)

13.16. Tuner Pack Schematic Diagram

13.17. SD Card Schematic Diagram

13.18. Front (L) Schematic Diagram

13.19. DV Jack Schematic Diagram

14 Prin ted Circuit Board

14.1. Power P.C.B.

14.2. Main P.C.B.

14.3. Tuner P.C.B. and DV Jack P.C.B.

14.4. SD Card P.C.B. and Front (L) P.C.B.

15 Appendix for Schematic Diagram

15.1. Voltage and Waveform Chart

16 Parts and Exploded Views

16.1. Exploded Views

16.2. Replacement Parts List

49 50

65 66 67 68 68

69 70 75 76

83 85

DMR-EH55EC / DMR-EH55EP / DMR-EH56EG

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.

1.1.1. 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 1MW and 5.2MW.

When the exposed metal does not have a return path to the chassis, the reading must be

Figure 1

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 1.5kW, 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 ACplugintheAC outlet andrepeat 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.

DMR-EH55EC / DMR-EH55EP / DMR-EH56EG

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 hamless 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).

2.2. Precaution of Laser Diode

DMR-EH55EC / DMR-EH55EP / DMR-EH56EG

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%

3 Service Navigation

3.1. Service Information

3.2. Caution for DivX

DMR-EH55EC / DMR-EH55EP / DMR-EH56EG

4 Specifications

DMR-EH55EC / DMR-EH55EP / DMR-EH56EG

5 New Feature

5.1. About DivX

5.1.1. General

DivX is a new video compressing format that is applied MPEG4 technology to improve image quality and the compressibility, and it is developed by the DivXNetworks, Inc., Video file of high resolution and the high picture quality c an be made though it is a high compressibility.

DivX codec is necessary for converting video to DivX file and .playback files made.

5.1.2. Operating Instructions about DivX

Video-on-Demand Content

DivX Video-on-Demand (VOD) content is encrypted for copyright protection. In order to play DivX VOD content on this unit, you first need to register the unit.

Follow the on line instructions for purchasing DivX VOD content to enter unit´s registration code and register unit. Visit www.divx.com/vod for more information.

Display unit´s registration code.

DMR-EH55EC / DMR-EH55EP / DMR-EH56EG

5.1.3. About DivX DRM

Divx file includes file to which DRM(Digital Right Management) is applied and file not applied. This item is a content that relates only in treating file to which DRM is applied.

1. Registration Code display function

2. User´s registration and approval function

3. Rental management function

1) Registration Code display function

Registration Code is alphanumeric character sequence 8bytes inputted as recorder information, in case a use purchases or rent a DivX DRM file in a network.

Registration code is a character sequence generated at random, and differs in each recorder. Moreover, Registration code is updated by new user authentication ever if same recorder.

2) User´s registration and approval function

· Only one user can register for one recorder. If user´s registration is not done with the recorder, DivX file cannot be played

· ·

back.

· User´s registration is performed only when a DivX DRM file is first chosen by recorder

· ·

· DivX DRM file that can perform user´s registration is only a file that is registered Registration Code and purchased or rented.

· ·

· User authentication is performed whenever DivX DRM file is played back.

· ·

Error message is displayed when failing in user´s registration and approval.

3) Rental management function

There are purchase file without registration of number of playback and rental files with registration of number of playback as Divx file. Number of playback of rental file is counted by the recorder.

When rental file is played, remaining number of times that can be played back will be shown to users, recorder requests users to input yes or no.

Following specifications have been installed for the rental files in the purpose to clarify the count condition of number of times of playback.

· Conditions on counting number of times of play.

· ·

1. When a file was opened successfully. (At the time of playback start)

2. When you have done review operation from the start. (Skip to file head)

- At this time, remaining number of times that can be played back and confirmation message [Do you play really?] are

- -

displayed.

- When the playback point has been skipped to the top of title, number of playback is not counted if the top of title was

- -

not recognized.

- Even if the power failure occurs after start of playback of rental file, number of times o f playback counted at start of

- -

the playback is held as it is. (Though playback stops by power failure, the number of times of playback is not counted.)

When it has reached head of title, the playback is ended, and screen becomes DivX menu (There is no resume) and then cursor is located on title that has been played back.

Then if the same file was continuously played back, it begins to playback from the file head.

Note:

Above mentioned stored user information and number of times of playback are not erased by update of firmware or by initialization by test mode.

DMR-EH55EC / DMR-EH55EP / DMR-EH56EG

6 Location of Controls and Components

Followings are the Location of Controls and Components for DMR-EH55EC and DMR-EH56EG as a sample. For other model, refer to each Operation Instructions.

DMR-EH55EC / DMR-EH55EP / DMR-EH56EG

7 Operation Instructions

7.1. Taking out the Disc from DVD-Drive Unit when the Disc cannot be ejected by OPEN/CLOSE button

7.1.1. Forcible Disc Eject

7.1.1.1. 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.

7.1.1.2. 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.

7.1.2. When the Forcible Disc Eject can not be done.

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. Slide SLIDE CAM by Eject Pin (JZJ0484) or minus screw driver (small) in the direction of arrow to eject tray slightly.

5. Put deck upward, and push out Tray by Eject Pin (JZS0484) or minus screw driver (small).

DMR-EH55EC / DMR-EH55EP / DMR-EH56EG

8 Service Mode

8.1. Self-Diagnosis and Special Mode Setting

8.1.1. 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

U59 Abnormal inner temperature

detected

U61 The unit is carrying out its

recovery process.

controller codes are not matched.

Display appears when the drive temperature exceeds 70°C. 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

“*” is remote controller code of the main unit. Display for 5 seconds.

No display

“U59 is displayed for 30 minutes.

No display

U88 The unit is carrying out its

U99 Hang-up Displayed when communication error has

H19 Inoperative fan motor When inoperative fan motor is detected after

F00 No error information Initial setting for error code in memory

F58 Drive hardware error When drive unit error is detected, the event is

F34 Initialization error when main

UNSUPPORTUnsupported disc error *An unsupported format disc was played,

recovery process.

microprocessor is started up for program recording

occurred between Main microprocessor and Timer microprocessor.

powered on, the power is turned off automatically. The event is saved in memory.

(Error code Initialization is possible with error code initialization and main unit initialization.)

saved in memory. 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.

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.

No display

Displayed is left until the [POWER] key is pressed.

No display No display

“This disc is incompatible.”

NO READ Disc read error *A disc is flawed or dirty.

*A poor quality failed to start. *The track information could not be read.

Display for 5 seconds.

“Cannot read. Please check the disc.”

DMR-EH55EC / DMR-EH55EP / DMR-EH56EG

Error Code Diagnosis contents Description Monitor Display Automatic FL display HARD

ERR

Drive error The drive detected a hard error. “DVD drive error.” Display for 5 seconds.

SELF CHECK

PLEASE WAIT

UNFORMATUnformatted disc error You have inserted an unformatted DVD-RAM

HDD ERROR

HDD NG Power on Stand-by setting

Restoration operation Since the power cord fell out during a power

Unit is in termination process Unit is in termination process now.

[HDD ERR] is displayed when start up of HDD was failed. (Except error of setting of Power on Stand-by)

error

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. / RAM drive.

“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.

or DVD-RW that is unformatted or recorded on other equipment.

a) When normal start up was failed. b) When start up at HDD boot was failed. c) When start up from state of P-OFF was

failed.

d) When start up from state of HDD SLEEP

was failed. [HDD ERR] is displayed when above each start up of HDD was failed. *In case b), tray opens automatically and [HDDERR] is displayed until version up disc is inserted.

[HDD NG] is displayed when power on Standby setting of HDD is NG or when HDD which power on Stand-by is not set to is used. Please try to replace HDD with junine HDD as service parts.

No display

8.1.2. Special Modes Setting

Item FL display Key operation

Mode name Description Front Key

TEST Mode *All the main unit´s parameters (include tuner)

are initialized.

Rating password The audiovisual level setting password is

initialized to “Level 8”.

Service Mode Setting every kind of modes for servicing.

*Details are described in “8.1.3. Service Mode at a glance”.

Forced disc eject Removing a disc that cannot be ejected.

The tray will open and unit will shift to P-off mode. *When Timer REC is ON or EXT-LINK is ON, execute " Forced disc eject " after releasing Timer REC or EXT-LINK. *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.

Press [STOP], [CH UP] and [OPEN/CLOSE] keys simultaneously for five seconds when power is off.

Open the tray, and press [REC] and [PLAY] simultaneously for 5 seconds.

When the power is off, press [CH UP], [OPEN/CLOSE] and [REC] keys simultaneously for 5 seconds.

When the power is off, press [STOP] and [CH UP] keys simultaneously for 5 seconds.

DMR-EH55EC / DMR-EH55EP / DMR-EH56EG

Item FL display Key operation

Mode name Description Front Key

Child lock/unlock Set or release “Child Lock”. Press [ENTER] and [RETURN] by

NTSC/PAL system select To switch PAL/NTSC altemately. The display before execution

leaves.

remote controller simultaneously until [X-HOLD] is displayed.

While the power is on (E-E mode), press [STOP] and [OPEN/CLOSE] simultaneously for 5 seconds.

Forced power-off When the power button is not effective while

power is ON, turn off the power forcibly. *When Timer REC is ON or EXT-LINK is ON, execute “Forced Power-off” after releasing Timer REC or EXT-LINK.

Aging Perform sequence of modes as * Aging

Description shown below continually.

Aging Contents (Example):

Display in P-off mode. Press [Power] key over than 10

seconds.

Display following the then mode. 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 reexecute operation shown above. (*All the main unit’s parameters include tuner 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 reexecute this command. *When releasing Aging mode, press [POWER] key.

DMR-EH55EC / DMR-EH55EP / DMR-EH56EG

Item FL display Key operation

Mode name Description Front Key

Demonstration lock/unlock

ATP re-execution Re-execute ATP. Display at ATP executing. When the power is on (E-E mode),

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 unlock the tray.

“UNLOCK” is displayed for 3 seconds.

*When press OPEN/CLOSE key while the tray being locked.

Display “LOCK” for 3 seconds.

When the power is on, press [STOP] and [POWER] keys simultaneously for 5 seconds.

Press [OPEN/CLOSE] key while the tray being locked.

press [CH UP] and [CH DOWN] simultaneously for 5 seconds.

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.

8.1.3. 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

Error Code Display Last Error Code of U/H/F held by Timer is

displayed on FL. *Details are described in “8.1.1. Self-

Diagnosis Functions”.

If any error history dose not exist, [F00] is displayed.

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)

mode.

Press [0] [1] in service mode

Press [0] [2] in service mode

‘’ * ’’ are version displays.

DMR-EH55EC / DMR-EH55EP / DMR-EH56EG

Item FL display Key operation

Mode name Description (Remote controller key)

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]”

RTSC Return in XP (A&V)

AV1 input signal is encoded (XP), decoded (XP) and output decoded signal to external without DISC recording and DISC playback.

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” and “RTSC Return in XP (A & V)” modes.

*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.

Initial mode: EE2/ Interlace/ XP/

Press [1] [3] in service mode.

Audio 48kHz

Switch Interlace/Progressive Press [1] [4] in RTSC Return XP

mode. *I/P are switched alternately.

Audio 44.1 kHz/ 48 kHz Switch Press [2] [4] in RTSC Return XP

mode. *48 kHz / 44.1 kHz are switched alternately.

Initial mode is Interlace

Press [1] [4] in I/P Switch mode. *I/P are switched alternately.

Switch Interlace/Progressive

Audio Mute (XTMUTE) Check whether mute is applied normally by

the timer microprocessor.

Audio Mute (XDMUTE) Check whether mute is applied normally by

the Digital P.C.B..

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].

Press [2] [1] in service mode.

Press [2] [2] in service mode.

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.

DMR-EH55EC / DMR-EH55EP / DMR-EH56EG

Item FL display Key operation

Mode name Description (Remote controller key)

HDD READ inspection Perform a complete read inspection of the

HDD.

When the HDD is OK

Press [3] [1] in service mode. *When canceling the checking mode while executing, do “forced power-off”.

If the HDD is defective

Method: Press the “POWER” button more than 10 seconds.

Laser Used Time Indiction

Delete the Laser Used Time

Check laser used time (hours) of drive.

Laser used time stored in the memory of the unit is deleted.

Press [4] [1] in service mode.

l(*****) is the used time display in hour. lLaser used time of DVD/ CD in Playback/Recording mode is counted.

Press [9] [5] in service mode.

DMR-EH55EC / DMR-EH55EP / DMR-EH56EG

Item FL display Key operation

Mode name Description (Remote controller key)

RAM Drive Last Error RAM Drive error code display.

*For details about the drive error code, refer to the Service Manual for the specific RAM Drive.

1. Error Number is displayed for 5 seconds.

2. Time when the error has occurred is displayed for 5 seconds.

DD: Day hh: Hour mm: Minute

3. Last Drive Error (1/2) is displayed for 5 seconds.

4. Last Drive Error (2/2) is displayed for 5 seconds.

5. Error occurring Disc type is displayed for 5 seconds.

Press [4] [2] in service mode. When “INFO******” is being displayed, past 19 error histories can be displayed by pressing [0] [1]

-[1][9]

Delete the Last Drive Error

Delete the Last Drive Error information stored on the DVD RAM-Drive.

Laser power confirmation Drive state is judged based on difference

between laser power value at shipping and present laser power value.

Turn on all FL/LEDs All segments of FL and all LEDs are turned

on.

PB HIGH Signal Output 8 pin of AV 1 Jack (PB HIGH terminal) is High

(approx. 11V DC).

6. Disc Maker ID is displayed for 5 seconds.

In case that the maker cannot be identified, display is black out.

7. Factor of Drive Error occurring is left displayed

Press [9] [6] in service mode.

1. into RAM Drive in service mode. (Other media are assumed to be noncorrespondence.)

2. Press [4] [4].

If DVD-RAM disc in not inserted, [NO DISC] is displayed. If power value study was filed, [ERROR] is displayed.

All segments are turned on. Press [5] [1] in service mode.

Press [5] [2] in service mode.

PB MIDDLE Signal Output

8 pin of AV 1 Jack (PB HIGH terminal) is Middle (approx. 5.5V DC)

Press [5] [3] in service mode.

DMR-EH55EC / DMR-EH55EP / DMR-EH56EG

Item FL display Key operation

Mode name Description (Remote controller key)

Front connection inspection

Production Date Display Display the date when the unit was produced.

Display the accumlated working time

Display the Error History Display the Error History stored on the unit. Display reason of error for 5

Press all front keys and check the connection between Main P.C.B. and Front key Switches.

Display the accumulated unit´s working time.

(1) Each time a key is pressed, segment turned on increases one by one. (2) Total umber of keys that have been pressed.

YY: Year MM: Month DD: Day

(Indicating unit: Second)

seconds.

Press [5] [4] in service mode.

Press [6] [1] in service mode.

Press [6] [4] in service mode.

Press [6] [5] in service mode. Then press [0] [1] ~ [1] [9], the past 19 error histories are displayed.

Delete the Error History Delete Error History information stored on the

unit.

01: Defect of Digital P.C.B. (AV DEC / MAIN CPU) 02: Defect of RAM Drive. 03: Defect of Disc. 04: Defect of Digital P.C.B. or Communication Error. 05: Defect of Digital P.C.B. (AV DEC / MAIN CPU) 06: Defect of HDD.

Display the time when the error has occurred for 5 seconds.

DD: Day hh: Hour mm: Minute Accumulated working time till occuring of the error is left displayed.

(Indicating unit: Second)

Press [9] [7] in service mode.

SD card WRITE check Delete Error History information stored on the

unit.

When the WRITE check is OK.

When the WRITE check is NG.

*Note:

The image stored in the SD card will be erased.

InsertaSDcardtoSDcardslot, and press [7] [4] in service mode. *Insert SD card while the power is off. *Check for [CARD SD] display on the FL display and go on the procedure.

DMR-EH55EC / DMR-EH55EP / DMR-EH56EG

Mode name Description (Remote controller key)

AV4(V)/AV1(RGB) I/O Setting

Set input to AV4 (V) and set output to AV1 (RGB) for I/O checking

Item FL display Key operation

Press [8] [0] in service mode.

AV2(Y/C)/AV1(V) I/O Setting

AV2(V)/AV1(Y/C) I/O Setting

AV2(RGB)/AV1(V) I/O Setting

Set input to AV2 (Y/C) and set output to AV1 (V) for I/O checking

Set input to AV2 (V) and set output to AV1 (Y/C) for I/O checking

Set input to AV2 (RGB) and set output to AV1 (V) for I/O checking

P50(H) Output Timer Microprocessor IC7501-76 output High

signal for AV1-pin 10 passing through inverter (approx. 0V DC at AV1-pin 10).

P50(L) Outpu t Timer Microprocessor IC7501-76 output Low

signal for AV1-pin 10 passing through inverter (approx. 4.4V DC at AV1-pin 10).

Tray OPEN/CLOSE Test The RAM drive tray is opened and closed

repeatedly.

Error code initialization Initialization of the last error code held by

timer (Write in F00)

When OK.

When NG.

When OK.

When NG.

“*” is number of open/close cycle times.

Press [8] [1] in service mode.

Press [8] [2] in service mode.

Press [8] [3] in service mode.

Press [8] [4] in service mode.

Press [8] [5] in service mode.

Press [9] [1] in service mode *When releasing this mode, press the [POWER] button of Remote Controller more than 10 seconds.

Press [9] [8] in service mode.

Initialize Service Last Drive Error, Error history and Error

Press [9] [9] in service mode. Codes stored on the unit are initialized to factory setting.

Finishing service mode Release Service Mode. Display in STOP (E-E) mode. Press power button on the front

panel or Remote controller in

service mode.

DMR-EH55EC / DMR-EH55EP / DMR-EH56EG

9 Service Fixture & Tools

Part Number Description Compatibility

RFKZ0260 Extension Cable (MainP.C.B. - RAM/Digital P.C.B. Module/ 88 Pin) Same as EH50 Series RFKZ0216 Extension Cable (MainP.C.B. - Power P.C.B./ 23 Pin) Same as E55 Series RFKZ0366 Extension FFC (HDD - RAM/Digital P.C.B. Module/ 40 Pin) New RFKZ0168 Extension Cable (Power P.C.B. - Fan Motor/ 3 Pin) Same as E50/ E55 Series RFKZ0339 Extension Cable (MainP.C.B. - HDD / 4 Pin) New JZS0484 Eject Pin Same as E50 Series RFKZ03D01K Lead Free Solder (0.3mm/100g Reel) New RFKZ06D01K Lead Free Solder (0.6mm/100g Reel) New RFKZ10D01K Lead Free Solder (1.0mm/100g Reel)) New RFKZ0316 Solder Remover (Lead free 10W temperature Solder/180g) New RFKZ0328 Flux New RFKZ0329 Bottle of Flux New

DMR-EH55EC / DMR-EH55EP / DMR-EH56EG

10 Disassemb ly and Assembly Instructions

10.1. Disassembly Flow Chart

The following chart is the procedure for disassembling the casing and inside parts for internal inspection when carrying out the servicing.

To assemble the unit, reverse the steps shown in the chart below.

10.2. P.C.B. Positions

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