Panasonic DMR-BS750EG User manual

© Panasonic Corporation 2010.
Unauthorized copying and distribution is a violation
of law.
ORDER NO.DSD1003015CE
Blu-ray Disc Recorder
Model No. DMR-BS750EG
DMR-BS850EG
Vol. 1
Colour
(K).......................Black Type

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TABLE OF CONTENTS PAGE PAGE
1 Safety Precautions -----------------------------------------------3
1.1. General guidelines-----------------------------------------3
2Warning--------------------------------------------------------------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----------6
3 Service Navigation------------------------------------------------7
3.1. How to format for HDD when replacement of
HDD or Power IF P.C.B.----------------------------------7
3.2. Service Information----------------------------------------8
3.3. Caution for DivX--------------------------------------------8
3.4. Micro Fuse conducting check---------------------------9
3.5. (HDD/BD Drive) Service Navigation-----------------10
3.6. Operation check when a USB device is
connected-------------------------------------------------- 11
3.7. Check with Tuner Service Mode --------------------- 11
4 Specifications----------------------------------------------------15
5 Location of Controls and Components------------------18
6 Installation Instructions---------------------------------------20
6.1. Taking out the Disc from BD-Drive Unit when
the Disc cannot be ejected by OPEN/CLOSE
button------------------------------------------------------- 20
7 Service Mode----------------------------------------------------- 21
7.1. Self-Diagnosis and Special Mode Setting--------- 21
8 Service Fixture & Tools--------------------------------------- 38
9 Disassembly and Assembly Instructions -------------- 39
9.1. Unit---------------------------------------------------------- 39
9.2. BD Drive --------------------------------------------------- 46
10 Measurements and Adjustments-------------------------- 52
10.1. Service Positions ---------------------------------------- 52
10.2. Caution for Replacing Parts--------------------------- 57
10.3. Standard Inspection Specifications after
Making Repairs------------------------------------------- 58

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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.
1.1.1. 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 metal-
lic cabinet part on the equipment such as screwheads,
connectors, control shafts, etc. When the exposed metal-
lic part has a return path to the chassis, the reading
should be between 1MΩand 5.2MΩ.
When the exposed metal does not have a return path to
the 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 1.5kΩ, 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 sensi-
tivity, to measure the potential across the resistor.
4. Check each exposed metallic part, and measure the volt-
age 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 mea-
surement is outside of the limits specified, there is a pos-
sibility of a shock hazard, and the equipment should be
repaired and rechecked before it is returned to the cus-
tomer.
Figure 1

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2Warning
2.1. 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 Elec-
trostatic Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistor-sand semi-
conductor "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 alumi-
num 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 compara-
ble 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 harmless 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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2.2. Precaution of Laser Diode

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2.3. Service caution based on legal restrictions
2.3.1. General description about Lead Free Solder (PbF)
The lead free solder has been used in the mounting process of all electrical components on the printed circuit boards used for this
equipment in considering the globally environmental conservation.
The normal solder is the alloy of tin (Sn) and lead (Pb). On the other hand, the lead free solder is the alloy mainly consists of tin
(Sn), silver (Ag) and Copper (Cu), and the melting point of the lead free solder is higher approx.30 degrees C (86°F) more than that
of the normal solder.
Definition of PCB Lead Free Solder being used
Service caution for repair work using Lead Free Solder (PbF)
• The lead free solder has to be used when repairing the equipment for which the lead free solder is used.
(Definition: The letter of “PbF” is printed on the PCB using the lead free solder.)
• To put lead free solder, it should be well molten and mixed with the original lead free solder.
• Remove the remaining lead free solder on the PCB cleanly for soldering of the new IC.
• Since the melting point of the lead free solder is higher than that of the normal lead solder, it takes the longer time to melt the
lead free solder.
• Use the soldering iron (more than 70W) equipped with the temperature control after setting the temperature at 350±30 degrees
C (662±86°F).
Recommended Lead Free Solder (Service Parts Route.)
• The following 3 types of lead free solder are available through the service parts route.
RFKZ03D01KS-----------(0.3mm 100g Reel)
RFKZ06D01KS-----------(0.6mm 100g Reel)
RFKZ10D01KS-----------(1.0mm 100g Reel)
Note
* Ingredient: tin (Sn), 96.5%, silver (Ag) 3.0%, Copper (Cu) 0.5%, Cobalt (Co) / Germanium (Ge) 0.1 to 0.3%
The letter of “PbF” is printed either foil side or components side on the PCB using the lead free solder.
(See right figure)

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3 Service Navigation
3.1. How to format for HDD when replacement of HDD or Power IF P.C.B.
3.1.1. How to escape " HDD Error " indication on GUI display.
1. When exchange HDD or Power IF P.C.B., the " HDD Error " screen is displayed, but, according to a following procedure,
please format HDD.
2. Press power button to turn off the power first, then turn on the power with the [GUIDE] button on remote-controller.
(Shown in Reference screen 1)
(Reference screen 1)
3. Press [RETURN] button to move to the normal display.
3.1.2. Procedure of the " HDD format ".
1. Press [FUNCTION MENU].
2. Select " Others " and press [OK].
3. Select " Setup " and press [OK].
4. Select " HDD/Disc " and press [OK].
5. Select " HDD Management " and press [OK] for 3 seconds.
6. Select " Format HDD " and press [OK].
7. Select " Yes " and press [OK].
8. Select " Start " and press [OK]. Then formatting starts.
9. Press [OK] after formatting completed.
10. Press [RETURN] to exit setting mode.

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3.2. Service Information
3.3. Caution for DivX

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3.4. Micro Fuse conducting check
This unit uses the Micro Fuse.
Check the Micro Fuse conducting using the Tester at the check points below.

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3.5. (HDD/BD Drive) Service Navigation
3.5.1. HDD/BD Drive Malfunction check (Simplified Method)
Perform simple quality judgement process of HDD/BD Drive according to the following operations.
1. Execute Service Mode
While the power is off, press [CH UP], [REC] and [OPEN/CLOSE] keys simultaneously for five seconds.
2. Press [3] [8] of remote controller keys in service mode.
3. Judge the quality on LCD display.
3.5.2. BD Drive Operation check flow
Perform quality judgement process of BD Drive according to the following operation.

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3.6. Operation check when a USB device is connected
You can check the operation status (normal or abnormal) of the USB connection part of this unit easily as shown below.
Connect each device to the USB terminal on the front panel and check the operation status on the TV monitor.
Normal operation:
Automatically displayed when the USB connection is made to a digital camera, etc.
(Example below: When JPEG materials have been recorded)
(*Displayed items differ depending on the recorded contents.)
Abnormal operation (Example 1):
Warning is displayed automatically if overcurrent is detected when a USB device is connected.
(*When a USB device or this unit’s USB terminal shorts out or the power supply type of USB device is connected)
Abnormal operation (Example 2):
When the terminal of USB device is damaged or open, there is no display on the TV monitor.
3.7. Check with Tuner Service Mode
Inspect the inside components using the application for inspections by service personnel.

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Main functions
1. Execute Tuner Service Mode
Turn the power on to receive digital broadcasting (HD broadcasting).
Press and hold [POWER] (Unit Key) and press [OPEN/CLOSE] + [REC] for 5 seconds at the same time.
2. Finishing Service Mode
Method 1: After turning the unit “OFF”, pull out the AC cord.
Method 2: Repeat turning ON and OFF twice: P-OFF →P-ON →P-OFF →P-ON.
3.7.1. Hard Test (Device Test)
Perform Access Test for each hard device and display the result.

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Note:
Hard test result does not guarantee that problems do not exist even if the result is OK.
The result is used as reference when any trouble occurs.
3.7.2. Use times and number of times of Power ON/OFF
Display accumulated time of Power ON and display number of times of Power ON/OFF.
*1 : Display accumulated time of Power ON
Display on a 15-minute basis
Example: 00123:15 →123 hour 15 minute
*2 : Display number of times of Power ON/OFF
Example: 0000123 →123
3.7.3. User Setting Information Backup
Purpose
After the recorder is repaired, the restored setting information is not default, but the information before repaired.
Operation summary
Before starting repair, import data on memory of the unit to export the data to SD card on Tuner Service Mode display.
After the repair is finished, import the data on SD card to export the data to the memory on the unit by operating on Tuner Service
Mode display again.
• Data to be backed up
Each setting item that a user can set at “SET UP” (*1) and “DVB TUNING” (START →FUNCTION →OTHERS →SET UP,
DVB TUNING, and "Program timer setting", “History information” etc.
* The following data cannot be backed up.
• Program chart data
• Dedicated areas for Internet site service providers (unique information for each company), broadcast mail, two-way
communication list, board, or favorite page
• Status saving systems (last channel except for BS Digital, drive selection status, etc.)
etc.
Note:
Of user setting information, only items selected and set on the initial Setup display can be backed up and restored.
*1: Of user setting information, except items selected and set on the initial Setup display.

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Operation procedure
Preparation:
Prepare a SD card to export data stored in this unit.
Create the following directory on the SD card.
EEPBAKSD
Boot:
1. On Tuner Service Mode display
Using Remote Controller, move the cursor to user’s setting information backup display position (Refer to below) on Tuner
Service Mode display.
2. Press [OK].
After “Try →OK” is displayed, the data is exported to SD card.
(Refer to below)
When OK(***) is displayed, the data is successfully exported.
Note:
If the backup file already exists in the SD card, the data is overwritten and “OK” is displayed.
3. Remove the SD card from the unit.
4. Turn the unit OFF to finish Tuner Service Mode.
Restoring the back up data to the unit
1. Turn the unit ON.
Perform the following: Function MENU - To Others - Setup - Others - Initialize - Shipping Condition.
2. Start Tuner Service Mode.
3. Insert the SD Card in save data to the unit.
4. Using Remote Controller, move the cursor to user’s setting information backup display position (Refer to below) on Tuner Ser-
vice Mode display.
5. Press [ENTER].
After “Try →OK” is displayed, the data is restored to SD card.
(Refer to below)
When OK(***) is displayed, the data is successfully exported.
6. Remove the SD card from the unit.
7. Turn the unit OFF to finish Tuner Service Mode.

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4 Specifications

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5 Location of Controls and Components

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6 Installation Instructions
6.1. Taking out the Disc from BD-Drive Unit when the Disc cannot be ejected
by OPEN/CLOSE button
6.1.1. Forcible Disc Eject
6.1.1.1. When the power can be turned off.
1. Turn off the power and press [STOP] [CH UP] keys on the front panel simultaneously for 5 seconds.
6.1.1.2. When the power can not be turned off.
1. Press [POWER] key on the front panel for over 4 seconds to turn off the power forcibly, and press [STOP] [CH UP] keys on
the front panel simultaneously for 5 seconds.
6.1.2. 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. Put deck so that bottom can be seen.
4. Slide SLIDE CAM by Paper Clip or minus screw driver (small) in the direction of arrow to eject tray slightly.
5. Put deck upward, and push out Tray by Paper Clip or minus screw driver (small).