Read Panasonic DMR-EZ47VEB Service Manual online
Vol. 1
Colours
(K).......................Black Type
(S).......................Silver Type
(S).......................Silver Type
DVD Recorder
ORDER NO.DSD0706015CE
Model No.
1 Safety Precaution
4
1.1.
General guidelines
4
2 Warning
5
2.1.
Prevention of Electrostatic Discharge (ESD) to
Electrostatic Sensitive (ES) Devices
5
2.2.
Precaution of Laser Diode
6
2.3.
Service caution based on legal restrictions
7
3 Service Navigation
8
3.1.
Service Information
8
4 Specifications
9
5 Location of Controls and Components
10
5.1.
Each Buttons
10
6 Operation Instructions
12
6.1.
(DVD) Taking out the Disc from RAM-Drive Unit when the
Disc cannot be ejected by OPEN/CLOSE button
12
6.2.
(VHS) Removing Cassette Tape manually
14
7 Service Mode
16
7.1.
(DVD) Self-Diagnosis and Special Mode Setting
16
7.2.
(VHS) Self-Diagnosis and Special Mode Setting
25
8 Service Fixture & Tools
29
9 Assembling and Disassembling Instructions
30
9.1.
Disassembly Flow Chart
30
9.2.
P.C.B. Positions
31
9.3.
Caution with inserting cassette tape when disassembling
the unit
32
9.4.
Top cover
33
9.5.
Front Panel
33
9.6.
Front Jack P.C.B., FL Drive P.C.B.
34
9.7.
VHS Mechanism Unit
36
9.8.
RAM/Digital P.C.B. Module
37
9.9.
DV Jack P.C.B.
38
9.10. Rear Panel, Fan Motor
39
9.11. HDMI P.C.B.
39
9.12. Dig. Interface P.C.B.
40
9.13. Backend P.C.B.
40
9.14. Main P.C.B.
40
10 Measurements and Adjustments
41
10.1. Service Positions
41
10.2. Caution for Replacing Parts
44
10.3. (DVD) Standard Inspection Specifications after Making
Repairs
47
11 Block Diagram
49
11.1. Power Supply Block Diagram
49
11.2. Main P.C.B. Regulator Block Diagram
50
11.3. Analog Video (1/2) Block Diagram
51
11.4. Analog Video (2/2) Block Diagram
52
11.5. Analog Audio Block Diagram
53
11.6. D-IF/Timer Block Diagram
55
11.7. System Control & Servo Block Diagram
56
11.8. HDMI Block Diagram
57
12 Schematic Diagram
59
12.1. Interconnection Schematic Diagram
59
12.2. Power Supply Section (Dig. Interface P.C.B.(1/2))
Schematic Diagram (P)
61
12.3. Digital I/F (1/4) Section (Dig. Interface P.C.B.(2/2))
Schematic Diagram (IF)
63
12.4. Digital I/F (2/4) Section (Dig. Interface P.C.B.(2/2))
Schematic Diagram (IF)
64
12.5. Digital I/F (3/4) Section (Dig. Interface P.C.B.(2/2))
Schematic Diagram (IF)
65
12.6. Digital I/F (4/4) Section (Dig. Interface P.C.B.(2/2))
Schematic Diagram (IF)
66
12.7. Video Section (Main P.C.B.(1/5)) Schematic Diagram (V)
67
12.8. VHS Audio Section (Main P.C.B.(2/5)) Schematic Diagram
(A)
68
12.9. Syscon/Servo/Timer (1/4) Section (Main P.C.B.(3/5))
Schematic Diagram (S)
69
12.10. Syscon/Servo/Timer (2/4) Section (Main P.C.B.(3/5))
Schematic Diagram (S)
70
12.11. Syscon/Servo/Timer (3/4) Section (Main P.C.B.(3/5))
Schematic Diagram (S)
71
12.12. Syscon/Servo/Timer (4/4) Section (Main P.C.B.(3/5))
Schematic Diagram (S)
72
12.13. I/O Section (1/4) (Main P.C.B.(4/5)) Schematic Diagram
(AV)
74
12.14. I/O Section (2/4) (Main P.C.B.(4/5)) Schematic Diagram
(AV)
75
12.15. I/O Section (3/4) (Main P.C.B.(4/5)) Schematic Diagram
(AV)
76
12.16. I/O Section (4/4) (Main P.C.B.(4/5)) Schematic Diagram
(AV)
77
12.17. Tuner Section (Main P.C.B.(5/5)) Schematic Diagram (TU)
79
12.18. HDMI Schematic Diagram
80
12.19. FL Drive Schematic Diagram
81
12.20. DV Jack Schematic Diagram
82
12.21. Front Jack Schematic Diagram
82
13 Printed Circuit Board
83
13.1. Dig. Interface P.C.B.
83
13.2. Main P.C.B.
88
13.3. HDMI P.C.B.
93
CONTENTS
Page
Page
2
DMR-EZ47VEB
13.4. FL Drive P.C.B.
94
13.5. Front Jack P.C.B.
95
13.6. DV Jack P.C.B.
95
14 Appendix for Schematic Diagram
97
14.1. Voltage and Waveform Chart
97
14.2. Abbreviations
106
15 Parts and Exploded Views
112
15.1. Exploded Views
112
15.2. Replacement Parts List
116
3
DMR-EZ47VEB
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
1M
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
1M
W and 5.2MW.
When the exposed metal does not have a return path to the
chassis, the reading must be
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 1.5k
W, 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.
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 AC plug in the AC outlet and repeat each of 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.
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
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.
4
DMR-EZ47VEB