Panasonic dmr eh 55 ec service manual

Page 1

ORDER NO.DSD0603003CE

Service Manual

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Notes: This models RAM/Digital P.C.B.
Module are - RFKNEH55EC(EC)

- RFKNEH55EP(EP)
- RFKNEH56EG(EG).

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

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

Please prepare the update disc.

(After that, FORMAT is necessary)

After that, pmramme in the HDD will be lost.
In detail, please refer to 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 pairing 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..

DVD Recorder

DMR-EH55EC
DMR-EH55EP
DMR-EH56EG

Vol. 1

Colour

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

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

DTS and DTS 2.0 + Digital Out" are trademarks of Digital
Theater Systems, Inc.

Apparatus Claims of U.S. Patent Nos. 4,631,603, 4,577,216, and
4,819,098, licensed for limited viewing uses only,

Panasonic?

This product incorporates copyright protection technology that is
protected by method claims of certain U.S. patents and other
intellectual property rights owned by Macrovision Corporation and
other rights owners. Use of this copyright protection technology
must be authorized by Macrovision Corporation, and is intended
for home and other limited viewing uses only unless otherwise
authorized by Macrovision Corporation. Reverse engineering or
disassembly is prohibited.

MPEG Layer-3 audio decoding technology licensed from
Fraunhoier IIS and Thomson multimedia.

© 2006 Matsushita Electric Industrial Co., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.

Page 2

DMR-EHSSEC / DMR-EH55EP / DMR-EHSGEG

AWARNING

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 injury or death.

CONTENTS

1 Safety Preca ution -------

1.1. General guidelines

2 Warning ---------------------------------------------------------------------------------- 4
2.1. Prevention of Electrostatic Discharge (ESD) to

Electrostatic Sensitive (ES) Devices -------------------------------- 4

22. Precaution of Laser Diode ..............

2.3. Service caution based on legal restrictions

3 Service Navigation ------------------------------------------------------------------ 7
3.1. Service Information -------------------------------------------------------- 7
3.2. Caution for DivX ------------------------------------------------------------ 7

4 Specifications -8

5 New Feature -- 10

5.1. About DivX ------------------------------------------------------------------ 10
6 Location of Controls and Components --------------------------------- 15
7 Operation Instructions ------------------------------------------------ 17

7.1. Taking out the Disc from DVD-Drive Unit when the Disc

cannot be ejected by OPEN/CLOSE button- 17

8 Service Mode --------------------------------------------------- 18
8.1. Self-Diagnosis and Special Mode Setting ---------------------- 18

9 Service Fixture & Tools -------------------------------------------------------- 27

10 Disassembly and Assembly Instructions
10.1. Disassembly Flow Chan-

10.2. P.C.B. Positions ..........
10.3. Top Case -------------------------------------------------------------------- 29
10.4. Front Panel __________________________________________________________________ 29
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 ------------------------------------------------------------------ 32
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 Measurements and Adjustments ------------------------------------------ 35
11.1. Service Positions --------------------------------------------------------- 35
11.2. Caution for Replacing Parts ------------------------------------------ 39
11.3. Standard Inspection Specifications after Making Repairs41

12 Block Diagram ...................................................................... 43
12.1. Power Supply Block Diagram ---------------------------------------- 43
12.2. Analog Video Block Diagram ---------------------------------------- 45
12.3. Analog Audio Block Diagram ---------------------------------------- 4e

12.4. Analog Timer Block Diagram

13 Schematic Diagram --------------------

Page
-49
-50

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) ------------------------------------------------------- 51
13.4. Main Net (2/4) Section (Main P.C.B. (1/4)) Schematic
Diagram (M) ----------------------------------------------------------------- 52
13.5. Main Net (3/4) Section (Main P.C.B. (1/4)) Schematic
Diagram (M) ----------------------------------------------------------- 53
13.6. Main Net (4/4) Section (Main P.C.B. (1/4)) Schematic
Diagram (M) ----------------------------------------------------------------- 54
13.7. A/V I/O (1/4) Section (Main P.C.B. (2/4)) Schematic
Diagram (AV) --------------------------------------------------------- 56
13.8. AN I/O (2/4) Section (Main P.C.B. (2/4)) Schematic
Diagram (AV) ----------------------------------------------------- 57
13.9. AN I/O (3/4) Section (Main P.C.B. (2/4)) Schematic
Diagram (AV) --------------------------------------------------------------- 58
1310. AN I/O (4/4) Section (Main P.C.B. (2/4)) Schematic
Diagram (AV) --------------------------------------------------------- 59
13.11. Nicam Decoder Section (Main P.C.B. (3/4)) Schematic
Diagram (DE) --------------------------------------------------------------- 61
13.12. Timer (1/4) Section (Main P.C.B. (4/4)) Schematic
Diagram (T) -- -62
13.13. Timer (2/4) Section (Main P.C.B. (4/4)) Schematic
Diagram (T) ------------------------------------------------- 63
13.14. Timer (3/4) Section (Main P.C.B. (4/4)) Schematic
Diagram (T) ---------------------------------------------------------- 64
13.15. Timer (4/4) Section (Main P.C.B. (4/4)) Schematic
Diagram (T) -------------------------------------------------------- 65
13.16. Tuner Pack Schematic Diagram ------------------------------------ 66
13.17. SD Card Schematic Diagram ---------------------------------------- 67
13.18. Front (L) Schematic Diagram -- -68
13.19. DV Jack Schematic Diagram -68
14 Printed Circuit Board ---------------- -69
14.1. Power P.C.B. --------------------------------------------------------------- 69
14.2. Main P.C.B. ----------------------------------------------------------------- 70
14.3. Tuner P.C.B. and DV Jack P.C.B.---- -75
14.4. SD Card P.C.B. and Front (L) P.C.B. -76
15 Appendix for Schematic Diagram --------- -77
15.1. Voltage and Waveform Chart --------------------------------------- 77
16 Parts and Exploded Views ---------------------------------------------------- 83
16.1. Exploded Views ----------------------------------------------------------- 83
16.2. Replacement Parts List ------------------------------------------------ 85