Panasonic DMREH-68-EC, DMREH-68-EP, DMREH-685-EG Service manual

ORDER NO.DSD0803011CE

DVD Recorder

Model No.DMR-EH68EC

DMR-EH68EP DMR-EH685EG

Vol. 1

Colour

(S).......................Sil ver Type

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

DMR-EH68EC / DMR-EH68EP / DMR-EH685EG

CONTENTS

Page Page

1 Safety Precaution 4

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 Location of Controls and Components 6 Operation Instructions

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

7 Service Mode

7.1. Self-Diagnosis and Special Mode Setting

8 Service Fixture & Tools 9 Disassembly and Assembly Instructions

9.1. Disassembly Flow Chart

9.2. P.C.B. Positions

9.3. Top case

9.4. Front Panel

9.5. Front (L) P.C.B., Front (R) P.C.B.

9.6. HDD, ATAPI P.C.B.

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

9.8. DV Jack P.C.B., USB SD P.C.B.

11 13

29 30

30 31 32 32 33 33 35 36

5 6 7

8 8

9.9. Rear Panel

9.10. Power P.C.B.

9.11. HDMI P.C.B.

9.12. Main P.C.B., SW P.C.B.

10 Measurements and Adjustment s

10.1. Service Positions

10.2. Caution for Replacing Parts

10.3. Standard Inspection Specifications after Making Repairs

11 Block Diagram

11.1. Power Supply Block Diagram

11.2. Analog Video Block Diagram

11.3. Analog Audio Block Diagram

11.4. Analog Timer Block Diagram

11.5. HDMI Block Diagram

12 Schematic Diagram

12.1. Interconnection Schematic Diagram

12.2. Power Supply Schematic Diagram

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

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

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

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

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

37 37 38 38

39 43 45

47 49 50 51 52

53 54

DMR-EH68EC / DMR-EH68EP / DMR-EH685EG

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

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

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

12.11. Tuner Section (Main P.C.B. (3/4)) Schematic Diagram (TU)

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

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

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

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

12.16. HDMI Schematic Diagram

12.17. USB SD Schematic Diagram

12.18. DV Jack Schematic Diagram

12.19. SW Schematic Diagram

12.20. Front (L) Schematic Diagram

12.21. Front (R) Schematic Diagram

12.22. ATAPI Schematic Diagram

13 Prin ted Circuit Board

13.1. Power P.C.B.

13.2. Main P.C.B.

13.3. HDMI P.C.B.

13.4. USB SD P.C.B.

13.5. Front (L) P.C.B., Front (R) P.C.B., SW P.C.B. and DV Jack P.C.B.

13.6. ATAPI P.C.B.

14 Appendix for Schematic Diagram

14.1. Voltage and Waveform Chart

15 Parts and Exploded Views

70 71 72

15.1. Exploded Views

15.2. Replacement Parts List

16 Schematic Diagram for printing w ith A4

73 73 73 74

75 76 81 82

83 84

93 95

103

DMR-EH68EC / DMR-EH68EP / DMR-EH685EG

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 1MΩ and 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 ACplug inthe AC outletand repeat eachof 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

DMR-EH68EC / DMR-EH68EP / DMR-EH685EG

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).

DMR-EH68EC / DMR-EH68EP / DMR-EH685EG

2.2. Precaution of Laser Diode

DMR-EH68EC / DMR-EH68EP / DMR-EH685EG

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 s hould 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%

DMR-EH68EC / DMR-EH68EP / DMR-EH685EG

3 Service Navigation

3.1. Service Information

3.2. Caution for DivX

4 Specifications

DMR-EH68EC / DMR-EH68EP / DMR-EH685EG

5 Location of Controls and Components

Followings are the Location of Controls and Components for DMR-EH685EG as a sample. For other model, refer to each Operation Instructions.

DMR-EH68EC / DMR-EH68EP / DMR-EH685EG

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.

DMR-EH68EC / DMR-EH68EP / DMR-EH685EG

6.1.2. 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. Remove the sheet of the bottom side.

DMR-EH68EC / DMR-EH68EP / DMR-EH685EG

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).

DMR-EH68EC / DMR-EH68EP / DMR-EH685EG

7. It is necessary to paste the Sheet again after ejection of the disc. Refer to the illustration of the Step 4 and below fugure about the portion of pasting the Sheet.

Note:

Use the replacement parts (RMV0335) when the Sheet has not being stickability.

DMR-EH68EC / DMR-EH68EP / DMR-EH685EG

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

U59 Abnormal inner temperature

detected

U61 The unit is carrying out its

recovery process.

controller codes are not matched.

Display appears when internal temperature of deck reaches limit 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

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

No display

“U59 is displayed for 30 minutes.

No display

U71 HDMI incompatible error

(HDCP incompatible)

U72 HDMI connection error

(communication error)

U73 HDMI connection error

(authentication error)

U88 The unit is carrying out its

recovery process.

U99 Hang-up Displayed when communication error has

H19 Inoperative fan motor When inoperative fan motor is detected after

Display this error when the equipment (compatible with DVI such as TV, amplifier etc.) connected to the unit by HDMI is incompatible with HDCP. *HDCP=High-bandwidth Digital Content Protection

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)

When authentication error occurs while the equipments (TV, amplifier etc.) are connected by HDMI. (or when there is a problem with the HDMI cable)

occurred between Main microprocessor and Timer microprocessor.

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

No display

U72 display disappears when error has been solved by Power OFF/ON of connecting equipment or by inserting/removing of HDMI cable.

No display

U72 display disappears when error has been solved by Power OFF/ON of connecting equipment or by inserting/removing of HDMI cable.

No display

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

No display No display

DMR-EH68EC / DMR-EH68EP / DMR-EH685EG

Error Code Diagnosis contents Description Monitor Display Automatic FL display F00 No error information Initial setting for error code in memory

No display No display (Error code Initialization is possible with error code initialization and main unit initialization.)

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

No display No display saved in memory.

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

No display No display

automatically. The event is saved in memory.

F74 HDIM Device Key

Communication error.

HDMI connection could not be authenticated due to a transfer malfunction.

No display 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.

F75 HDIM Device Key Information

error

HDMI connection could not be authenticated due to an internal data malfunction.

No display 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.

UNSUPPORTUnsupported disc error *An unsupported format disc was played,

although the drive starts normally.

“This disc is

incompatible.”

*The data format is not supported, although the media type is supported. *Exceptionally in case of the disc is dirty.

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

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

HARD

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

ERR

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. / RAM drive.

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.

UNFORMATUnformatted disc error You have inserted an unformatted DVD-RAM

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

Display for 5 seconds.

“Cannot read.

Please check the

disc.”

No display

IR ERR IR communication error [IR ERR] is displayed when communication

between Timer microprocessor and IR microprocessor fails.

No REC Recording is impossible [No REC] is displayed when recording is

impossible due to the defect, dirt or wound of media.

No display

DMR-EH68EC / DMR-EH68EP / DMR-EH685EG

Error Code Diagnosis contents Description Monitor Display Automatic FL display HDD

ERROR

HDD NG Power on Stand-by setting

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

error

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

7.1.2. 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 “7.1.3. 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, set DRIVE SELECT to DVD, 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.

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

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.

leaves.

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

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.

seconds.

DMR-EH68EC / DMR-EH68EP / DMR-EH685EG

Item FL display Key operation

Mode name Description Front Key

Aging Perform sequence of modes as * Aging

Description shown below continually.

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.

Aging Contents (Example):

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 in the condition that a disc in the tray.

NOTE:

Time difference between pressing [STOP] and [POWER] should be within 0.5 sec.

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

NOTE:

Time difference between pressing [STOP] and [POWER] should be within 0.5 sec.

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

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

DMR-EH68EC / DMR-EH68EP / DMR-EH685EG

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.

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.

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

displayed on FL. *Details are described in “7.1.1. Self-

Diagnosis Functions”.

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 (displayed for 5 sec.)

Press [0] [1] in service mode

If any error history does not exist, [F00] is 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]”

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] [1] in service mode.

Switch Interlace/Progressive Press [1] [4] in White Picture Output

mode. *I/P are switched alternately.

*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.

DMR-EH68EC / DMR-EH68EP / DMR-EH685EG

Mode name Description (Remote controller key)

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.

Item FL display Key operation

Initial mode: EE2/ Interlace/ XP/

Press [1] [3] in service mode.

Audio 48kHz

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.

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].

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

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-EH68EC / DMR-EH68EP / DMR-EH685EG

Item FL display Key operation

Mode name Description (Remote controller key)

HDD READ SEEK Inspection

Inspecting seek time of HSS to inspect performance.

At start

Press [3] [1] in service mode. * When canceling the inspection mode while executing, do “forced power-off”. Method: Press [POWER] key more than 10 seconds.

The [*] sign is added every 20 seconds while inspecting. Two digits on the right side are the progress level of the inspection (The unit is %). Example on the way of inspection:

When HDD is OK after inspection:

(NG is displayed when error is excluding o ) (Transfer rate is calculated from the AV scanning result, and when it is less than 35Mbps, NG is displayed. )

$: [X] is displayed when seek time is over 270msec., there is error or transfer rate is NG. Position at $ is space when excluding those. ##: Number of data of over 100msec. and less than 270msec. When it is over 100, [99] is displayed. When the number is less than 5, we judge it normal.

DMR-EH68EC / DMR-EH68EP / DMR-EH685EG

Mode name Description (Remote controller key)

HDD READ VERIFY Inspection

Measure of access time in READ VERIFY MODE of HDD.

Item FL display Key operation

At start

Press [3] [2] in service mode. * When canceling the inspection mode while executing, do “forced power-off”. Method: Press [POWER] key more than 10 seconds.

The [*] sign is added every 20 seconds while inspecting. Two digits on the right side are the progress level of the inspection (The unit is %). Example on the way of inspection:

When HDD is OK after inspection:

(NG is displayed when error is excluding o ) (Transfer rate is calculated from the AV scanning result, and when it is less than 35Mbps, NG is displayed. )

HDD Spin-up time The accumulation value of the Spin-up time of

HDD is displayed.

Press [3] [3] in service mode.

Spin-up time of HDD is displayed. (The unit of display is hour.)

DMR-EH68EC / DMR-EH68EP / DMR-EH685EG

Item FL display Key operation

Mode name Description (Remote controller key)

HDD High Speed Scan

Press [3] [6] in service mode.

The [*] sign is added every 10 seconds while inspecting. Two digits on the right side are the progress level of the inspection (The unit is %). Example on the way of inspection:

When HDD is OK after inspection:

When HDD is NG after inspection:

HDD Check Simple quality judgment of HDD

Laser Used Time

Check laser used time (hours) of drive.

Indication

Delete the Laser Used Time

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

[*] is the number of data of NG.

Press [3] [7] in service mode.

When HDD is OK:

When HDD is NG:

Press [4] [1] in service mode.

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

Press [9] [5] in service mode.

DMR-EH68EC / DMR-EH68EP / DMR-EH685EG

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.

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.

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

6. Disc Maker ID is displayed for 5 seconds.

7. Factor of Drive Error occurring is left displayed

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

Press [9] [6] in service mode.

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

2. Press [4] [4].

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).

PB MIDDLE Signal Output

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

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.

Press [5] [3] in service mode.

DMR-EH68EC / DMR-EH68EP / DMR-EH685EG

Item FL display Key operation

Mode name Description (Remote controller key)

Front connection inspection

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

Press [5] [4] in service mode.

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

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

Press [6] [1] in service mode.

YY: Year MM: Month DD: Day

Display the accumulated

Display the accumulated unit´s working time.

Press [6] [4] in service mode.

working time

(Indicating unit: Second)

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

seconds.

Press [6] [5] in service mode. Then press [0] [1] ~ [9] [9], the past 99 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 occurring of the error is left displayed.

(Indicating unit: Second)

Press [9] [7] in service mode.

DMR-EH68EC / DMR-EH68EP / DMR-EH685EG

Item FL display Key operation

Mode name Description (Remote controller key)

USB check Display the volume label of the USB memory. When USB memmory is not

connected.

Press [7] [5] in service mode.

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

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

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

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

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

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

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

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

When USB check is OK.

[*] is volume label.

Example of volume label is [PANASONIC] :

When USB check is NG.

When OK.

* Insert USB memory.

Press [8] [0] in service mode.

Press [8] [1] in service mode.

Press [8] [2] in service mode.

Press [8] [3] in service mode.

Press [8] [4] in service mode.

When NG.

P50(L) Output 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 tray is opened and closed repeatedly.

Error code initialization Initialization of the last error code held by

timer (Write in F00)

Initialize Service Last Drive Error, Error history and Error

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

When OK.

When NG.

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

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.

Press [9] [9] in service mode.

panel or Remote controller in service mode.

DMR-EH68EC / DMR-EH68EP / DMR-EH685EG

8 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 RFKZ0327 Extension Cable (MainP.C.B. - Power P.C.B./ 15 Pin) Same as E55 Series RFKZ0125 Extension FFC (HDD - RAM/Digital P.C.B. Module/ 40 Pin) Same as EH55 Series RFKZ0168 Extension Cable (Main P.C.B. - Fan Motor/ 3 Pin) Same as E50/ E55 Series RFKZ0169 Extension Cable (MainP.C.B. - HDD / 4 Pin) Same as EH55 Series RFKZ0197 Extension Cable (MainP.C.B. - HDMI P.C.B. / 8 Pin) Same as E50/ E55 Series RFKZ0367 Extension Cable (MainP.C.B. - FRONT (R) P.C.B. / 6 Pin) Same as EH75V Series JZS0484 Eject Pin Same as E50 Series RFKZ03D01K Lead Free Solder (0.3mm/100g Reel) Same as EH55 Series RFKZ06D01K Lead Free Solder (0.6mm/100g Reel) Same as EH55 Series RFKZ10D01K Lead Free Solder (1.0mm/100g Reel)) Same as EH55 Series RFKZ0316 Solder Remover (Lead free low temperature Solder/50g) Same as EH55 Series RFKZ0328 Flux Same as EH55 Series

DMR-EH68EC / DMR-EH68EP / DMR-EH685EG

9 Disassembly and Assembly Instructions

9.1. 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.

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