Panasonic dmr ex 77 service manual

Page 2

DMR-EX77EG l DMR-EX77EC I DMR-EX77EC1 I DMR

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 prolessional 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 Precaution --

1.1. General guidelines

2 Warning ---------------------------------------------------------------------------------- 4
2.1. Prevention of Electrostatic Discharge (ESD) to
Electrostatic Sensitive (ES) Devices ................................ 4
2.2. Precaution of Laser Diode .............................................. 5
2.3. SerVICe caution based on legal restrictions ...................... 5
3 Service Navigation .................................................................. 7
3.1. Service Information ..............
3.2. Caution for DivX (Except EB)
4 Specifications -------------------------------

5 Location of Controls and Components ................................. 1o
6 Operation Instructions .......................................................... 12
6.1. Taking out the Disc from DVD-Drive Unit when the Disc

cannot be ejected by OPEN/CLOSE button ................... 12
7 Service Mode --------------------------------------------------------------------- 15
7.1. SeltDiagnosis and Special Mode Setting ...................... 15

8 Service Fixture 8. Tools ----------------------

9 Disassembly and Assembly Instructions

9.1. Disassembly Flow Chart ----------------

9.2. P.C.B. Positions ----------------------------------------------------------- 29
9.3. Top cover -------------------------------------------------------------------- 30
9.4. Front Panel ------------------------------------------------------------------ 30
9.5. HDD, ATAPI P.C.B. ------------------------------------------------------ 31
9.6. RAM/Digital P.C.B. Module ------------------------------------------- 33
9.7. SD/DV Jack P.C.B. ...................................................... 34
9.8. Rear Panel .................................................................. 34

9.9. Power P.C.B.
9.10. HDMI P.C.B.
9.11. Backend P.C.B.

9.12. Main P.C.B., Front Jack P.C.B. and Front (L) P.C.B. ----- 36
10 Measurements and Adjustments -- ----37
10.1. Service Positions --------------------------------------------------------- 37
10.2. Caution for Replacing Parts -------------------- -...41
10.3. Standard Inspection Specifications after Making Repairs43
11 Block Diagram ...................................................................... 45

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. HDMl Block Diagram ---------------------------------------------------- 50
12 Schematic Diagram --------------------------------------------------------------- 51
12.1. Interconnection Schematic Diagram .............................. 51

12.2. Power Supply Schematic Diagram -------------------------------- 52

Page

12.3. Main Net (1/4) Section (Main P.C.B. (1/4)) Schematic
Diagram (M) ----------------------------------------------------------------- 53

12.4. Main Net (2/4) Section (Main P.C.B. (1/4)) Schematic
Diagram (M) ----------------------------------------------------------------- 54

12.5. Main Net (3/4) Section (Main P.C.B. (1/4)) Schematic
Diagram (M) ----------------------------------------------------------------- 55

12.6. Main Net (4/4) Section (Main P.C.B. (1/4)) Schematic
Diagram (M) ----------------------------------------------------------------- 56

127. AV |/O (1/4) Section (Main P.C.B. (2/4)) Schematic
Diagram (AV)-
12.8. AV l/o (2/4) Section (Main P.C.B. (2/4)) Schematic

--58

Diagram (AV) --------------------------------------------------------------- 59
12.9. AV |/O (3/4) Section (Main P.C.B. (2/4)) Schematic
Diagram (AV) --------------------------------------------------------------- 60
12.10. AV l/o (4/4) Section (Main P.C.B. (2/4)) Schematic
Diagram (AV) ----------------------------------------------------- 61
12.11. Tuner Section (Main P.C.B. (3/4)) Schematic Diagram
(TU) ------------------------------------------------------- 63

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

--65

Diagram (T) -------------------------------------------- 56
12.14. Timer (3/4) Section (Main P.C.B. (4/4)) Schematic

Diagram (T)--- ------------------------------------- 57
12.15. Timer (4/4) Section (Main P.C.B. (4/4)) Schematic

Diagram (T)--- ------------------------------------------ 58

12.16. HDMl Schematic Diagram----
12.17. DV Jack/SD Card Schematic Diagram-
12.18. Front Jack Schematic Diagram
12.19. Front (L) Schematic Diagram --

12.20. ATAPI Schematic Diagram ........................................... 71

13 Printed Circuit Board ............................................................ 73
13.1. Power P.C.B. --------------------------------------------------------------- 73
13.2. Main P.C.B. ----------------------------------------------------------------- 74
13.3. HDMl P.C.B. ---------------------------------------------------------------- 79
13.4. Front Jack P.C.B. and Front (L) P.C.B. ......................... 30

13.5. DV Jack and SD Card P.C.B
13.6. ATAPI P.C.B.-
14 Appendix for Schematic Diagram

14.1. Voltage and Waveform Chart --------------------------------------- 83
15 Parts and Exploded Views ---------------------------------------------------- 90
15.1. Exploded Views ----------------------------------------------------------- 90
15.2. Replacement Parts List ------------------------------------------------ 92