Panasonic DMRE75VP User manual

© 2004 Matsushita Electric Industrial CO., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
DMR-E75VP
Colour
(S).......................Silver Type
DVD Video Recorder
ORDER NO.DSD0403007C1
B24

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DMR-E75VP

1 Safety precautions 5
1.1. General guidelines 5
1.2. Caution for fuse replacement 5
2 Prevention of Electrostatic Discharge (ESD) to Electrostatic
Sensitive (ES) Devices 6
3 Precaution of Laser Diode 7
4 How to replace the Lithium Battery 8
5 Handling the Lead-free Solder 8
5.1. About lead free solder (PbF) 8
6 Each Buttons 9
7 New Features 12
7.1. Function of Power Circuit (IC11150) 12
8 (DVD) Taking out the Disc from RAM-Drive Unit when the
Disc cannot be ejected by OPEN/CLOSE button 15
8.1. (DVD) Forcible Disc Eject 15
8.2. (DVD) When the Forcible Disc Eject can not be done. 15
9 (VHS) Removing Cassette Tape manually 16
9.1. (VHS) Removal by compulsory unloading. 16
9.2. (VHS) Removal by manual operation by rotating the
Loading Motor with the batteries. 16
9.3. (VHS) Take out Cassette Tapemanually after removing the
mechanism 17
10 (DVD) Service Explorer 18
11 (DVD) Self-Diagnosis and Special Mode Setting 21
11.1. (DVD) Self-Diagnosis Functions 21
11.2. (DVD) Special Modes Setting 22
11.3. (DVD) Service Modes 24
12 (VHS) Self-Diagnosis and Special Mode Setting 29
12.1. (VHS) Self-Diagnosis Functions 29
12.2. (VHS) Special Modes Setting 30
12.3. (VHS) Service Modes 30
12.4. (VHS) Self-Diagnosis History Memory Function 31
12.5. (VHS) Description of Self Diagnosis Memory 33
13 Assembling and Disassembling 35
13.1. Disassembly Flow Chart 35
13.2. P.C.B. Positions 36
13.3. Cation with inserting cassette tape when disassembling
the unit 36
13.4. Top Case 37
13.5. Front Panel 37
13.6. Front Jack P.C.B. & FL Drive P.C.B. 38
13.7. Rear Panel & Fan Motor 38
13.8. I/O P.C.B. 39
13.9. VTR Mechanism Unit 39
13.10. Main P.C.B. 40
13.11. DVD-RAM Drive 40
13.12. Digital P.C.B. 41
13.13. Power & Digital I/F P.C.B. 42
14 Service Fixture and Tools 43
15 Service Positions 44
15.1. Checking and Repairing of Power & Digital I/F P.C.B. 44
15.2. Checking and Repairing of Main P.C.B. 45
15.3. Checking and Repairing of Digital P.C.B. 46
15.4. Checking and Repairing of I/O P.C.B. 47
15.5. Checking and DVD-RAM Drive 48
16 (DVD) Caution after parts replacing parts 49
16.1. (DVD) After replacing the RAM Drive with new one 49
16.2. (DVD) When the unit does not operate normally after
replacing the Timer Microprocessor with new one 49
17 (VHS) Caution after replacing parts 50
17.1. (VHS) Adjustment Procedures after replacing DD Cylinder,
VHS Microprocessor or Main P.C.B. 50
17.2. (VHS) X-VALUE & LINEARITY (P2 and P3 Posts)
ADJUSTMENT 51
17.3. (VHS) Caution after replacing VHS Microprocessor
(IC6001) 53
18 (DVD) Standard Inspection Specifications after Making
Repairs 53
19 Voltage and Waveform Chart 54
19.1. Power & Digital I/F P.C.B. 54
19.2. Main P.C.B. 55
19.3. I/O P.C.B. 57
19.4. FL Drive P.C.B. 58
19.5. Front Jack P.C.B. 58
19.6. P9001 Connector 58
19.7. Waveform 59
20 Abbreviations 61
20.1. DVD 61
20.2. VHS 63
21 Block Diagram 67
21.1. Power Supply Block Diagram 67
21.2. Digital I/F Regulator Block Diagram 68
21.3. Digital I/F Timer Block Diagram 69
21.4. System Control, Servo & Timer Block Diagram 70
21.5. Audio Block Diagram 71
21.6. Video Block Diagram 72
21.7. Digital Block Diagram 74
21.8. Digital Block IC Pin Terminal Chart 75
22 Schematic Diagram 77
22.1. Interconnection Schematic Diagram 77
22.2. Power Supply Section (Power & Digital I/F P.C.B.(1/2))
Schematic Diagram (P) 79
22.3. Digital I/F Section (Power & Digital I/F P.C.B.(2/2))
Schematic Diagram (D) 80
22.4. Syscon/Servo/Timer Section (Main P.C.B.(1/3)) Schematic
Diagram (S) 83
22.5. Hi-Fi Audio Section (Main P.C.B.(2/3)) Schematic Diagram
(A) 85
22.6. Video Section (Main P.C.B.(3/3)) Schematic Diagram (V)
87
22.7. Glue Net Section (Digital P.C.B.(1/4)) Schematic Diagram
(GN) 90
CONTENTS Page Page
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22.8. AVENC/RTSC Section (Digital P.C.B.(2/4)) Schematic
Diagram (EN) 92
22.9. AV Decoder/Main CPU Section (Digital P.C.B.(3/4))
Schematic Diagram (MC) 95
22.10. Audio I/O Section (Digital P.C.B.(4/4)) Schematic Diagram
(AI) 97
22.11. A/V I/O Schematic Diagram 98
22.12. FL Drive Schematic Diagram 99
22.13. Front Jack Schematic Diagram 100
23 Print Circuit Board 101
23.1. Power & Digital I/F P.C.B 101
23.2. Main P.C.B. 103
23.3. Digital P.C.B. 108
23.4. I/O P.C.B. 111
23.5. Front Jack , FL Drive P.C.B. 112
24 Exploded Views 113
24.1. Casing Parts & Mechanism Section 1 113
24.2. Casing Parts & Mechanism Section 2 114
24.3. VHS Mechanism Section 115
24.4. Packing & Accessories Section 116
25 Replacement Parts List 117
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DMR-E75VP

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
1MWand 5.2MW.
When the exposed metal does not have a return path to
the chassis, the reading must be .
Figure 1
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 1.5kW, 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.
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.
1 Safety precautions
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.
1.2. Caution for fuse replacement
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2 Prevention of Electrostatic Discharge (ESD) to
Electrostatic Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called
Electrostatic Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistor-sand
semiconductor "chip" components. The following techniques should be used to help reduce the incidence of component damage
caused by electrostatic discharge (ESD).
1.Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your
body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap,
which should be removed for potential shock reasons prior to applying power to the unit under test.
2.After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as
aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.
3.Use only a grounded-tip soldering iron to solder or unsolder ES devices.
4.Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static (ESD protected)" can
generate electrical charge sufficient to damage ES devices.
5.Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.
6.Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most
replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable
conductive material).
7.Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material
to the chassis or circuit assembly into which the device will be installed.
Caution
Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
8.Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise hamless motion such as the brushing
together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage
an ES device).
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3 Precaution of Laser Diode
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4 How to replace the Lithium Battery
REPLACEMENT PROCEDURE
1.Remove the Top case and DVD-RAM drive unit with Main P.C.B. by referring the Disassembling Procedure.
2.Unsolder the Lithium Batteries: B7751 and then replace it into new one.
( As shown in 23.2.3. The Main P.C.B. )
NOTE:
The lithium battery is a critical component. ( Type No.: CR2354-1GUF Manufactured by Panasonic. )
It must never be subjected to excessive heat or discharge.
It must therefore only be fitted in equipment designed specifically for its use.
Replacement batteries must be of the same type and manufacture.
They must be fitted in the same manner and location as the original battery, with the correct polarity contacts observed.
Do not attempt to re-charge the old battery or re-use it for any other purpose.
It should be disposed of in waste products destined for burial rather than incineration.
5 Handling the Lead-free Solder
5.1. About lead free solder (PbF)
Distinction of PbF P.C.B.:
P.C.B.s (manufactured) using lead free solder will have a PbF stamp on the P.C.B.
Caution:
·
· ·
· Pb free solder has a higher melting point than standard solder; Typically the melting point is 50 - 70°F (30 - 40°C) higher.
Please use a high temperature soldering iron. In case of the soldering iron with temperature control, please set it to 700 ±
20°F (370 ± 10°C).
·
· ·
· Pb free solder will tend to splash when heated too high (about 1100°F/600°C).
·
· ·
· When soldering or unsoldering, please completely remove all of the solder on the pins or solder area, and be sure to heat
the soldering points with the Pb free solder until it melts enough.
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6 Each Buttons
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2. Equivalence Circuit to IC11150
3. Startup Circuit
When power is turned on, input voltage of the Switching
Transformer is supplied to IC11150 as the startup power.
After IC11150 has started, the startup current is cut off.
The current of Startup Circuit is supplied as constant
current source in IC11150 and as charge current for the
capacitor connected between Vcc terminal and GND out
side of IC11150 until Vcc reaches 14.4V.
When Vcc reaches 14.4V, the Startup Circuit is cut off, then
oscillation starts.
After then, power of IC11150 is supplied from control coil.
In case, the power failure or short out of the load, when Vcc
becomes 9.0V; the oscillation stops, furthermore Vcc
becomes 7.1V the Startup Circuit starts up and Vcc starts to
rise.
Pin No. Symbol Description
1Z/C Trigger input terminal.
Zero detection voltage: 0.25V
It becomes less than 3V, the mode turns to
standby.
2F/B Bias current feedback input terminal.
lSwitching ON time (min.) ~ (max.)
1.5V ~ 4.5V / 0µsec. ~ 25µsec.
lIn standby mode
Oscillation stops: less than 0.8V
Oscillation starts: over 1.8V
3 GND GND terminal
4Vcc Power terminal of IC.
Oscillation starting voltage: Vcc = and over 14.5V
Oscillation stop voltage: Vcc = and less than 9.6V
Over voltage latching voltage: Vcc = 20V
5Drain Drain terminal for Main switching material.
7 New Features
7.1. Function of Power Circuit (IC11150)
1. General
We adopted IC module as the Switching Power Circuit for lower power consumption.
IC11150 is constructed with Switching materials and Control IC, and is partial resonance module.
We realized Switching Power with high efficiency, low noise and low power consumption.
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Startup Circuit Timing Chart
Function of Z/C Terminal
When voltage of Z/C reaches 0.25V, Gate signal is output and Drain current starts to flow.
Function of F/B terminal
F/B signal decides Switching ON width in low voltage controlling.
The Switching ON width responds to change of F/B Voltage.
Standby Function
When Z/C Voltage becomes less than 3V, the unit changes to Standby mode.
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DMR-E75VP

IC11150 Block Diagram
Signal name
Pin No. Name Symbol
1Zero Current Det. Z/C
2Feed back F/B
3 GND GND
4Vcc Vcc
5Drain Drain
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DMR-E75VP

8 (DVD) Taking out the Disc from RAM-Drive Unit when the
Disc cannot be ejected by OPEN/CLOSE button
8.1. (DVD) Forcible Disc Eject
8.1.1. (DVD) When the power can be turned off.
1.Turn off the power and press [(DVD) STOP], [(DVD) CH UP] keys on the front panel simultaneously for 5 seconds.
8.1.2. (DVD) When the power can not be turned off.
1.Press [POWER] key on the front panel for over 10 seconds to turn off the power forcibly, and press [(DVD) STOP] [(DVD) CH
UP] keys on the front panel simultaneously for 5 seconds.
8.2. (DVD) When the Forcible Disc Eject can not be done.
1.Turn off the power and pull out AC cord.
2.Remove the Top Case.
3.Remove the Front Panel.
4.Remove screw (A) and Earth Angle.
5.Remove 4 screws (B) and Upper Base Unit from DVD-RAM Drive.
6.Take out the disc and put the Opener Roller on fully position for direction of Arrow.
7.Put the Upper Base Unit so that the Opener Roller is inserted into the groove.
8.Check center of Opener Roller is seen through the Opener position Checking Hole, and tighten 4 screws (B).
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DMR-E75VP

9 (VHS) Removing Cassette
Tape manually
When the cassette tape could not be uninstalled from an
electrical malfunction, there are 2 ways to remove a cassette
tape.
9.1. (VHS) Removal by compulsory
unloading.
If Service Mode can be activated when the power can not be
turned on, this operation is able.
1.Press [FF] and [EJECT] button simultaneously for more
than 3 seconds and set the Service Mode to 7.
2.Press [STOP] button in order to unload the mechanism.
(Pay attention to tape slack)
Service Mode Display:
7****(STOP)®70L**(EJECT)
9.2. (VHS) Removal by manual
operation by rotating the
Loading Motor with the
batteries.
1.Disconnect the AC plug, and remove the Top Panel and the
Front Panel by referring to the Disassembly Procedures.
2.Connect three batteries (1.5V spec.) to the Loading Motor
in series for supplying 4.5V to rotate the Loading Motor as
shown below.
3.Stop unloading just before unloading will be completed as
shown below, and then the tape becomes slack as shown
below.
4.Rotate the S-Reel by a small minus screwdriver to remove
the slack tape as shown below.
5.Then unload again to remove the cassette tape as shown
below.
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9.3. (VHS) Take out Cassette
Tapemanually after removing
the mechanism
1.Disconnect the AC plug, and remove the Top Panel, Front
Panel and the Mechanism by referring to "13 Assembling
and Disassembling"
2.Remove the Screw and remove the Loading Motor as
shown below.
3.Rotate the Main Cam Gear counter-clockwise until just
before the unloading will be completed as shown below. .
4.Rotate the Capstan Motor clockwise to remove the slack
tape as shown below.
5.Rotate the Main Cam Gear counter-clockwise again to
remove the cassette-tape as shown below.
6.Attach Loading Motor and tighten the screw.
7.Set the Position Switch to EJECT POSITION certainly and
attach the mechanism to chassis as shown below.
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DMR-E75VP

10 (DVD) Service Explorer
Confirm “RAM-Drive Last Error” in Service Mode
Execute Service Mode
1.When the power is off, press [VHS to DVD DUBBING], [OPEN/CLOSE] and [DVD STOP keys simultaneously for 5
seconds.
FL Display:
*After finishing display “(7). Factor of Drive Error occurring”, press [0] [2] ~[9] [9] keys of the Remote Controller so that
99 memories can be displayed as maximum.
2.Press [4] [2] keys of remote controller.
Example of FL Display:
(1) Error Number is displayed for 5 seconds.
(2) Time when the error has occurred is displayed for 5 seconds.
(3) Last Drive Error (1/2) is displayed for 5 seconds.
(4) Last Drive Error (2/2) is displayed for 5 seconds.
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(5) Error occurring Disc type is displayed for 5 seconds.
(6) Disc Maker´s ID is displayed for 5 seconds.
Example of Disc Maker´s ID:
DVD-R Disc
No. FL Display (Disc Maker´s ID) Disc Maker Country
1 MEI Panasonic Japan
2PVC Pioneer Japan
3MCC Mitsubishi Chemical Corporation Japan
4TDK TDK Japan
5MXL Maxell Japan
6MCI MITUI CHEMICALS Japan
7JVC Victor JVC Japan
8 TAIYOYUDEN Taiyo yuden Japan
TYG
9GSC Giga Storage Taiwan
10 PRODISC Prodisc Taiwan
11 PRINCO PRINCO Taiwan
12 RITEK RITEK Taiwan
13 OPTDISC OPTDISC Taiwan
14 LEAD DATA LEAD DATA Taiwan
15 CMC CMC Taiwan
16 AUVISTAR AUVISTAR Taiwan
17 ACER Acer Taiwan
18 VIVASTAR VIVASTAR Switzerland
19 LGE LG Electronics Korea
DVD-RAM Disc
No. FL Display (Disc Maker´s ID) Disc Maker Country
1 MEI Panasonic
2MATSUSHITA Panasonic Japan
3MXL Maxell Japan
4PRODISC Prodisc Taiwan
5OPTDISC OPTDISC Taiwan
6CMC CMC Taiwan
*Since an display is arbitrarily set up by the disk producer side, the above-mentioned display may be changed.
Please make it reference as an example of a display.
(7) Factor of Drive Error occurring is left displayed
Error Occurring Disc Type
FL Display Disc Type
00 DVD-ROM/Video
01 Audio-CD
02 2.6GB DVD-RAM
03 4.7GB DVD-RAM
04 DVD-R
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Error Occurring Disc State
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