Panasonic SJ-MD150 Instructions de construction
MB0003001C2
Mini Disc Deck
SJ-MD150
Mechanism Unit: MR3A
Colour
(K)..........Black Type
Areas
(E)..........Europe.
(EB).......Great Britain.
(EG).......Germany.
SPECIFICATIONS
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© 2000 Matsushita Electric Industrial Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of
law.
1. Accessories
- AC power supply cord for (E), (EG) areas / (RJA0043-1C)..............................1 pc.
- AC power supply cord for (EB) area / (RJA0044-C)..............................1 pc.
- Optical-fiber cable / (RJL1X009B08).........................1 pc.
2
- Stereo phone cables / (RJL2P004B08A).......................2 pcs.
- Remote control transmitter / (EUR645272)............................1 pc.
- Batteries / (R6, AA, UM-3)..........................2 pcs.
Note: There are available on sales route.
2. Handling Precautions for MD Unit
The laser diode in the MD unit (optical pickup) may break down due to potential difference caused by static
electricity of clothes or human body. So be careful of electrostatic breakdown during repair of the MD unit
(optical pickup).
2.1. Handling of MD Unit (optical pickup)
1. Do not subject the MD unit (optical pickup) to static electricity as it is extremely sensitive to electrical shock.
2. To protect the breakdown of the laser diode, an anti-static shorting pin is inserted into the flexible board (FPC board).
Refer to Fig. 2-1.
3. Take care not to apply excessive stress to the flexible board (FPC board).
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Fig. 2-1.
2.2. Grounding for electrostatic breakdown prevention
2.2.1. Human body grounding
Use the anti-static wrist strap to discharge the static electricity from your body. Refer to Fig. 2-2.
Fig. 2-2.
2.2.2. Work table grounding
Put a conductive material (sheet) or steel sheet on the area where the MD unit (optical pickup) is placed, and
ground the sheet. Refer to Fig. 2-3. Fig. 2-3.
Caution:
The static electricity of your clothes will not be grounded through the wrist strap.
So take care not to let your clothes touch the MD unit (optical pickup).
3. Precaution of Laser Diode
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4. Caution for AC Mains Lead
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5. Location of Controls
6. Self-Diagnostic Function
This unit is equipped with a self-diagnostic function which, in the event of a malfunction, automatically display
a code indicating the nature of the malfunction. Use this self-diagnostic function when servicing the unit.
6.1. Setting to the self-diagnostic function
1. Turn the power ON.
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2. With no MD loaded in the unit, press and hold the STOP button ( ) for at least 2 seconds. And then while still
pressing the STOP button ( ), press the F. SEARCH button ( ) for at least 2
seconds. The unit is set to the self-diagnostic function and is displayed “MD TEST”. Then error code is displayed, if any.
Refer to Fig. 6-1. For details of error codes, refer to Table 6-1.
Caution:
If more than one error exists, the display will sequentially show the respective error codes each time the F. SEARCH
button ( ) is pressed.
Fig. 6-1.
Table 6-1.
Error code Symptom Possible cause
F15 Interval till MD starts playing is too
long. -Traverse det. switch (S8) is defective; Check and replace if necessary.
F26 MD is loaded but cannot be played. -Communications error between the servo processor IC and the microprocessor IC
(system control). Check if the flexible circuit board is disconnected.
-Displayed when the disc is scratched too.
F28 MD cannot be loaded. -Confirm that the disc is not catching on anything.
-The connection (flexible circuit board or connector cable) between the MD unit and t
h
MD servo circuit board is disconnected or damaged; check and replace if necessary.
-The MD unit may be malfunctioning; replace it.
F29 MD cannot be ejected. -Confirm that the disc is not catching on anything.
-The connection (flexible circuit board or connector cable) between the MD unit and t
h
MD servo circuit board is disconnected or damaged; check and replace if necessary.
-The MD unit may be malfunctioning; replace it.
6.2. Canceling the self-diagnostic function
The self-diagnostic function can be canceled by pressing the POWER button (POWER) to turn the system off.
And then pressing the power button to turn it on again.
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6.3. Clearing the self-diagnostic function
The contents of abnormality display are stored in memory. In order to clear the memory, continue to press the
STOP button ( ) for at least 5 seconds while in the self-diagnostic function. The memory will clear.
Always be sure to clear this memory after completing repair.
7. Self Check Function
This unit is equipped with a self check function which can detect a part of malfunction. Use this self check
function before servicing the unit and check the item as shown below.
7.1. Setting to the self check function
1. Turn the power ON.
2. With no MD loaded in the unit, press and hold the STOP button ( ) for at least 2 seconds. And then while still
pressing the STOP button ( ), press the R. SEARCH button ( ) for at least 2
seconds. Then the unit is set to the self check function, the FL display is turned off. Refer to Fig. 7-1.
Fig. 7-1.
7.2. Checking the operation buttons
When the unit is set to self check function, press the operation buttons on the unit except the POWER button
(POWER). It displayed “-” mark adapted each buttons. Refer to Fig. 7-2. and Fig. 7-3. about allotment.
Fig. 7-2.
Fig. 7-3.
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7.3. Checking the FL display
All buttons works normally except the POWER button (POWER), FL display and LED turns on and off at 0.5
second interval. Refer to Fig. 7-4. and Fig. 7-5. Fig. 7-4.
Fig. 7-5.
The self check function can be canceled by pressing the POWER button (POWER) or pressing and hold the
STOP button ( ) for at least 2 seconds.
8. Operation Checks and Component Replacement /
Procedures
- This section describes procedures for checking the operation of the major printed circuit boards and replacing
the main components.
- For reassembly after operation checks or replacement, reverse the respective procedures. Special reassembly
procedures are described only when required.
8.1. Checking for the main P.C.B.
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