2. SERVICE MODE ....................................................................................................................................... 2
3. MD MODULE(KML-252 with PCB) ELECTRICAL ADJUSTMENTS.................................................. 4
12. PARTS LOCATIONS .............................................................................................................................. 45
13. MICROPROCESSOR AND IC DATA ................................................................................................... 53
14. EXPLODED VIEW AND MECHANISM PARTS LIST......................................................................... 57
15. ELECTRICAL PARTS LIST ................................................................................................................... 59
CHARGE
Portable Mini Disc Recorder
DC IN 12V
LR
LINE OUT
DIGITAL OUT
OFF
ON
➂
➁
➀
PORTABLE MINIDISC RECORDER PMD650
DIGITAL RECORDING
POWEREJECT
HP/SPK VOLUME
PHONES
TABLE OF CONTENTS
MIC
0dB
REPEAT A-B/DEL TITLE CHAR ENTER
EDIT
BACKSPACE
REC PAUSE
DISPLAY
REC MODE
MIC ATTEN
SP LP
-15dB
FLAT
ANC
-30dB MIC LINE
LIGHT
MONO (L ch)
STEREO INT MIC L R
SOURCE
HP/SPK MODE
ALC
INPUT LEVEL
ANALOG DIGITAL
INPUT SELECT
REC/MARK
KEY LOCK
STEREO
REC LEVEL
OFF
PMD650
LIMITER
MANUAL
ON
LSR
L
R
REC
LEVEL
Please use this service manual with referring to the user guide ( D.F.U. ) without fail.
R
Printed in Japan
PMD650
409S855010 MIT
3120 785 22260
First Issue 2000.03
MARANTZ DESIGN AND SERVICE
MARANTZ AMERICA, INC.
WILDASH AUDIO SYSTEMS NZ
Using superior design and selected high grade components, MARANTZ company has created the ultimate in stereo sound.
Only original MARANTZ parts can insure that your MARANTZ product will continue to perform to the specifications for which
it is famous.
Parts for your
MARANTZ equipment are generally available to our National Marantz Subsidiary or Agent.
ORDERING PARTS :
Parts can be ordered either by mail or by Fax.. In both cases, the correct part number has to be specified.
The following information must be supplied to eliminate delays in processing your order :
1. Complete address
2. Complete part numbers and quantities required
3. Description of parts
4. Model number for which part is required
5. Way of shipment
6. Signature : any order form or Fax. must be signed, otherwise such part order will be considered as null and void.
SUPERSCOPE TECHNOLOGIES, INC.
MARANTZ PROFESSIONAL PRODUCTS
2640 WHITE OAK CIRCLE, SUITE A
AURORA, ILLINOIS 60504 USA
PHONE : 630 - 820 - 4800
FAX : 630 - 820 - 8103
CAUTION : After servicing this appliance and prior to returning to customer, measure the resistance between either primary AC
cord connector pins ( with unit NOT connected to AC mains and its Power switch ON ), and the face or Front Panel of product and
controls and chassis bottom.
Any resistance measurement less than 1 Megohms should cause unit to be repaired or corrected before AC power is applied, and
verified before it is return to the user/customer.
Ref. UL Standard No. 813.
In case of difficulties, do not hesitate to contact the Technical
Manufactured under license from Dolby Laboratories
Licensing Corporation.
Specifications subject to change without notice.
1
2. SERVICE MODE
2-1. PRECAUTIONS FOR USE OF SERVICE MODE
1. As loading related operations will be performed regardless
of the SERVICE MODE operations being performed, be sure
to check that the disc is stopped before setting and removing it. Even if the EJECT switch is slid while the disc is
rotating during continuous playback, etc., the disc will not
stop rotating. Therefore, it will be ejected while rotating. Be
sure to slide the EJECT switch after pressing the STOP
button and the rotation of disc is stopped.
2.The erasing-protection tab is not detected in the SERVICE
MODE. Therefore, when operating in the recording laser
emission mode and pressing the REC button, the recorded
contents will be erased regardless of the position of the
tab. When using a disc that is not to be erased in the SERVICE MODE, be careful not to ENTER the continuous recording mode and traverse adjustment mode.
2-1-1. Recording Laser Emission Mode and Operating
• For detailed description of each adjustment mode, refer to
the " MD UNIT ELECTRICAL ADJUSTMENTS".
• If a different adjustment mode has been selected by mistake, press the STOP button to exit from it.
✱1: The EEP MODE is not used in servicing. If set acciden-
tally, press the STOP button immediately to exit it.
2-6. EEP MODE
This mode reads and writes the contents of the non-volatile
memory.
It is not used in servicing. If set accidentally, press the STOP
button immediately to exit it.
2. Perform this adjustment in an ambient temperature of 22
°C to 28 °C. Perform it immediately after the power is turned
on when the internal temperature of the unit is the same as
the ambient temperature of 22 °C to 28 °C.
3. When DQ10 has been replaced, perform this adjustment
after the temperature of this part has become the ambient
temperature.
Adjusting Method:
1. Selected by Use the EDIT(<, >) buttons and display "TEMP
ADJ".
2. Press the ENTER button. The display shows "TEMP +25C".
By using the EDIT(<, >) buttons, set the current temperature.
3. To save the data, press the ENTER button.
4. When the ENTER button is pressed, "DATA SAVE" will be
displayed for 1 second, followed by "TEMP ADJ".
3-6. LASER POWER ADJUSTMENT
Connection:
Laser
power mater
Optical pick-up
objective lens
Adjusting Method:
1. Set the sensor disc of power meter into the MD mechanism.
2. Selected by Use the EDIT(<, >) buttons and display "LDPWR
ADJ". (Laser power : for adjustment)
3. Press the ENTER button and display "LD 0.9 $
". (Then
the pickup will move to inside automatically.)
4. Selected by Use the EDIT(<, >) buttons so that the reading
of the laser power meter becomes 0.88 to 0.92 mW.
Set the range control on the laser power meter to 10 mW,
then press the ENTER button to save the adjustment result
in the non-volatile memory. ("DATA SAVE" will be displayed
for a moment.)
5. Then "LD 7.0 $ " will be displayed.
6. Press the PLAY button, selected by Use the EDIT(<, >)
buttons so that the reading of the laser power meter becomes 6.95 to 7.05 mW, press the ENTER button and save
the adjustment result in the non-volatile memory. ("DATA
SAVE" will be displayed for a moment.)
Note : The emission stops after 10 seconds automatically.
When the adjustment resume, press the PLAY button.
7. Selected by Use the EDIT(<, >) buttons and display
"LDPWR CHK".
8. Press the ENTER button and display "LD 0.9 $
".
Check that the reading of the laser power meter becomes
0.80 to 0.96 mW.
9. Press the ENTER button and display "LD 7.0 $
".
Check that the reading of the laser power meter satisfy 6.95
to 7.05 mW.
10. Press the STOP button and display "LDPWR CHK". and
stop the laser emission.
The STOP button is effective at all times to stop the laser
emission.
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::
:
::
Osilloscope
(DC range)
3-7. TRAVERSE (E-F BALANCE) ADJUSTMENT
Note 1 : Data will be erased during MO reading if a recorded
disc is used in this adjustment.
Note 2 : If the traverse waveform is not clear. connect the
oscilloscope as shown in the following figure so that
it can be seen more clearly.
Connection:
Osilloscope
(DC range)
JQ20 pin 3 (TEO)
JQ20 pin 2 (VC)
330k
10p
+
-
V : 0.1 V/div
( )
H : 10 ms/div
Adjusting Method:
1. Connect an oscilloscope to JQ20 pin 3 (TEO) and JQ20
pin 2 (VC) of the MD board (PQ01).
2. Load a low reflection disc (any available on the market).
(Refer to Note 1.)
3. Press the
button or button and move the optical
pick-up outside the pit.
4. Use the EDIT(<, >) buttons and display "EFBAL ADJ".
5. Press the ENTER button and display "EFBAL MO".
(Laser power READ power/Focus servo ON/tracking servo
OFF/spindle (S) servo ON)
6. Press the ENTER button.
7. Use the EDIT(<, >) buttons so that the waveforms of the
oscilloscope becomes the specified value. (When the the
EDIT(<, >) buttons is Used, the "
" of "MOr EFB= "
changes and the waveform changes.) In this adjustment,
waveform varies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as
possible. (MO read power traverse adjustment)
(Traverse Waveform)
specification : A = B
8. Press the ENTER button, and save the result of adjustment to the non-volatile memory. ("DATA SAVE" will be
displayed for a moment. Then "MOw EFB=
" will be displayed.) The optical pick-up moves to the pit area automatically and servo is imposed.
9. Use the EDIT(<, >) buttons so that the waveforms of the
oscilloscope becomes the specified value. (When the the
EDIT(<, >) buttons is Used, the "
" of "MOw EFB= "
changes and the waveform changes.) In this adjustment,
waveform varies at intervals of approx. 2%. Adjust the
waveform so that the specified value is satisfied as much
as possible.
10. Press the ENTER button, and save the result of adjust-
ment to the non-volatile memory. ("DATA SAVE" will be
displayed for a moment. Then "MOp EFB=
" will be dis-
played.)
11. Use the EDIT(<, >) buttons so that the waveforms of the
oscilloscope becomes the specified value. (When the the
EDIT(<, >) buttons is Used, the " " of "MOp EFB= "
changes and the waveform changes.) In this adjustment,
waveform varies at intervals of approx. 2%. Adjust the
waveform so that the specified value is satisfied as much
as possible.
(MO write power traverse adjustment)
(Traverse Waveform)
specification : A = B
12. Press the ENTER button, and save the result of adjust-
ment to the non volatile memory. ("DATA SAVE" will be
displayed for a moment.) Then "MOp EFB=
" will be dis-
played.
13. Slide the EJECT switch and remove the low reflection
disc.
14. Load the test disc. ( High reflection disc TMD-381 )
15. Press the ENTER button and display "CD EFB=
".
16. Press the ENTER button. Servo is imposed automatically.
17. Use the EDIT(<, >) buttons so that the waveforms of the
oscilloscope becomes the specified value. (When the the
EDIT(<, >) buttons is Used, the " " of "CD EFB= "
changes and the waveform changes.) In this adjustment,
waveform varies at intervals of approx. 2%. Adjust the
waveform so that the specified value is satisfied as much
as possible.
18. Press the ENTER button, and save the result of adjustment to the non-volatile memory. ("DATA SAVE" will be displayed for a moment. Then "EFBAL ADJ" will be displayed.)
19. Press the EJECT switch and remove the test disc. ( High
reflection disc TMD-381 )
3-8. FOCUS BIAS ADJUSTMENT
Connection:
Jitter Meter
JQ20 1pin(RF)
JQ20 2pin(VC)
+
-
Adjusting Method:
1. Load a continuously recorded disc (Refer to "3-4. Creating
MO Continuously Recorded. Disc".).
2. Use the EDIT(<, >) buttons and display "FBIAS ADJ".
3. Press the ENTER button and display "a = ".
4. Press the ">" of the EDIT(<, >) button and find the focus
bias value at which the reading of the jitter meter becomes
27 ns to 30 ns. (Refer to note 2.) If the reading of the jitter
meter is over 30 ns, press the "<" of the EDIT(<, >) button.
It will be down.
5. Press the ENTER button and display "b = ".
6. Press the "<" of the EDIT(<, >) button and find the focus
bias value at which the reading of the jitter meter becomes
27 ns to 30 ns. (Refer to note 2.) If the reading of the jitter
meter is over 30 ns, press the ">" of the EDIT(<, >) button.
It will be down.
Note : If the sarvo is out and It stops to adjust, press the STOP
button. The display will show "ADJ CANCEL", and the
display return to "FBIAS ADJ".
7. Press the ENTER button, and save the result of adjustment
to the non-volatile memory. ("DATA SAVE" will be displayed
for a moment. ) Then "c =
8. Press the DISPLAY button and display "C1
" will be displayed.
AD " and
check that the C1 error rate is below 50 and ADER is 00.
Then press the STOP button. The first four digits indicate
the C1 error rate, the two digits after indicate ADER.
9. If the reading of the jitter meter is over 28 ns, press the
STOP button ("FBIAS ADJ" will be displayed.) and adjust it
again.
10. Press the STOP button and slide the EJECT switch to
remove the continuously recorded disc.
Note 1 : The relation between the C1 error and jiter meter is as
shown in the following figure. Find points a and b in
the following figure using the above adjustment. The
focal point position c is automatically calculated from
points
a
and b.
Note 2 : As the jiter meter changes, perform the adjustment