Panasonic dmr eh 68 ec service manual

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ORDER NO.DSD080301 10E

Service Manual

Notes: These model's RAM/Digital P.C.B.
Module are - RFKNEH68EC(EC)
- RFKNEH68EP(EP)

- RFKNEH685EG(EG).

When replacing Main P.C.B. or EEPROM,
"UNFORMAT" indication is displayed and HDD must be
formatted.

When replacing HDD, it is necessary to update
the firmware.

Please prepare the update disc.

(After that, FORMAT is necessary)

After that, programme in the HDD will be lost.
In detail, please referto each content in this service

manual.

Caution:

Pairing of RAM Drive and Digital P.C.B. as "RAM/
Digital P.C.B. Module" have to be replaced together.

If the either RAM drive or Digital P.C.B. is changed,
RAM Drive unit has to be re-aligned. Because the
alignment data for RAM Drive Unit is stored in Digital P.C.B.,

Panasonic?

DVD Recorder

ModemoDMR-EHGSEC
DMR-EH68EP
DMR-EH685EG

Vol. 1

Colour

(8)... Silver Type
(K) ...... ...Black Type

© 2008 Matsushita Electric Industrial 00., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.

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DMR-EHBBEC / DMR-EHGSEF / DMR-EHBSSEG

Manufactured under license from Dolby Laboratories
Dolby and the double-D symbol are trademarks ofDolby
Laboratories.

DTS is a registered trademark of DTS, Inc. and DTS
2.0i Digital Out" is a trademark of DTS, Inc,

This product incorporates copyright protection technology that is
protected by US. patents and other intellectual property rights
Use ofthis copyright protection technology must be authorized by
Macrovision, and is intended for home and other limited viewing
uses only unlessotherwise authorized by Maclovision. Reverse
engineering or disassembly is prohibited.

O SDHC Logo is a trademark
o Portions of this product are protected under copyright law and
are provided under license by ARIS/SOLANA/4C.

Official DivX® Certified product.

Plays all versions of DivX® video (including DivX®6) with standard
playback of DivX® media files.

DivX, DivX Certified, and associated logos are trademarks of

DivX, Inc. and are used under license.

HDMI, the HDMI logo and High-Definition Multimedia Interface
are trademarks or registered trademarks ofHDMI Licensing LLC.

HDAVI Control is a trademark of Matsushita Electric Industrial
Co, Ltd.

GUIDE Plus+, SHOW Vle are (I) registered trademarks or
trademarks of, (2) manufactured under license from and (3)
subject ofvarious international patenu and patent applications
owned by, or licensed to, Gemstar-TV Guide International, Inc.
and/or its related affiliates.

GEMSTAR-TV GUIDE INTERNATIONAL, INC. AND/OR
ITS RELATED AFFILIATES ARE NOT IN ANY WAY
LIABLE FOR THE ACCURACY OF THE PROGRAM
SCHEDULE INFORMATION PROVIDED BYTHE GUIDE
PLUS+ SYSTEM. IN NO EVENT SHALL GEMSTAR-TV
GUIDE INTERNATIONAL, INC. AND/OR ITS RELATED
AFFILIATES BE LIABLE FOR ANY AMOUNTS
REPRESENTING LOSS OF PROFITS, LOSS OF
BUSINESS, OR INDIRECT, SPECIAL, OR
CONSEQUENTIAL DAMAGES IN CONNECTION WITH
THE PROVISION OR USE OF ANY INFORMATION,
EQUIPMENT, OR SERVICES RELATING TO THE

GUIDE PLUS+ SYSTEM.

A WARNING

This service information is designed for experienced repair technicians only and is not designed for use by the general public.

It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service
or repair the product or products dealt with in this service information by anyone else could result in serious injun/ or death.

CONTENTS

1 Safety Precaution -----
1.1. General guidelines --------------------------------------------------------- 4

2 Warning -----
2.1. Prevention of Electrostatic Discharge (ESD) to

Electrostatic Sensitive (ES) Devices

a)

2.2. Precaution of Laser Diode-

2.3. Service caution based on legal restrictions-

3 Service Navigation .................................................................. 3
3.1. Service Information -------------------------------------------------------- g
3.2. Caution for DivX ------------------------------------------------------------ g
4 Specifications ------------------------------------------------------------------------- 9
5 Location of Controls and Components ................................ 11

6 Operation Instructions --------------------------------- ----13
6.1. Taking out the Disc from DVD-Drive Unit when the Disc

cannot be ejected by OPEN/CLOSE button 13

7 Service Mode -------------------------------------------------- .17
7-1. Self-Diagnosis and Special Mode Setting ...................... 17
8 Service Fixture & Tools -------------------------------------------------------- 29
9 Disassembly and Assembly Instructions .............................. 30
9.1. Disassembly Flow Chart ............................................... 30
9.2. P.C.B. Positions ----------------------------------------------------------- 31
9.3. Top case --------------------------------------------------------------------- 32

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. ---------------------------------- 36

Page
9.9. Rear Panel ------------------------------------------------------------------ 37
9.10. Power P.C.B. --------------------------------------------------------------- 37
9.11. HDMI P.C.B. ................................................................ 38
9.12. Main P.C.B., SW P.C.B. ............................................... 33

10 Measurements and Adjustments

10.1. Service Positions --
10.2. Caution for Replacing Parts
10.3. Standard Inspection Specifications after Making Repairs-45

11 Block Diagram ---------------------------------------------------------------------- 47
11.1. Power Supply Block Diagram ---------------------------------------- 47
11.2. Analog Video Block Diagram ---------------------------------------- 49
11.3. Analog Audio Block Diagram ---------------------------------------- 50
11.4. Analog Timer Block Diagram ........................................ 51

11.5. HDMI Block Diagram
12 Schematic Diagram

12.1. Interconnection Schematic Diagram

12.2. Power Supply Schematic Diagram -------------------------------- 54
12.3. Main Net (1/4) Section (Main P.C.B. (1/4)) Schematic
Diagram (M) -------------------------------------------------- 55
12.4. Main Net (2/4) Section (Main P.C.B. (1/4)) Schematic
Diagram (M) ------------------------------------------------------- 56
12.5. Main Net (3/4) Section (Main P.C.B. (1/4)) Schematic
Diagram (M) ------------------------------------------------------- 57
12.6. Main Net (4/4) Section (Main P.C.B. (1/4)) Schematic
Diagram (M) -58

12.7. AV I/O (1/4) Section (Main P.C.B. (2/4)) Schematic
Diagram (AV) --------------------------------------------------- 60