Panasonic dmr eh 55 ec service manual

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