69
DEH-P645R,P545R,P544R,P443R
1)Precautions
This unit uses a single power supply (+5V) for the regu-
lator. The signal reference potential, therefore, is con-
nected to REFO(approx. 2.5V) instead of GND.
If REFO and GND are connected to each other by mis-
take during adjustments, not only will it be impossi-
ble to measure the potential correctly, but the servo
will malfunction and a severe shock will be applied to
the pick-up. To avoid this, take special note of the fol-
lowing.
Do not connect the negative probe of the measuring
equipment to REFO and GND together. It is especially
important not to connect the channel 1 negative
probe of the oscilloscope to REFO with the channel 2
negative probe connected to GND.
Since the frame of the measuring instrument is usual-
ly at the same potential as the negative probe, change
the frame of the measuring instrument to floating sta-
tus.
If by accident REFO comes in contact with GND,
immediately switch the regulator or power OFF.
• Always make sure the regulator is OFF when connect-
ing and disconnecting the various filters and wiring
required for measurements.
• Before proceeding to further adjustments and mea-
surements after switching regulator ON, let the player
run for about one minute to allow the circuits to stabi-
lize.
• Since the protective systems in the unit's software are
rendered inoperative in test mode, be very careful to
avoid mechanical and /or electrical shocks to the sys-
tem when making adjustment.
• Test mode starting procedure
Switch ACC, back-up ON while pressing the
4
and
6
keys together.
• Test mode cancellation
Switch ACC, back-up OFF.
• Disc detection during loading and eject operations is
performed by means of a photo transistor in this
unit.Consequently, if the inside of the unit is exposed
to a strong light source when the outer casing is
removed for repairs or adjustment, the following mal-
functions may occur.
*During PLAY, even if the eject button is pressed,the
disc will not be ejected and the unit will remain in
the PLAY mode.
*The unit will not load a disc.
When the unit malfunctions this way, either re-posi-
tion the light source, move the unit or cover the
photo transistor.
• When loading and unloading discs during adjustment
procedures, always wait for the disc to be properly
clamped or ejected before pressing another key.
Otherwise, there is a risk of the actuator being
destroyed.
• Turn power off when pressing the button TR+ or the
button TR- key for focus search in the test mode. (Or
else lens may stick and the actuator may be dam-
aged.)
• SINGLE/4TRK/10TRK/32TRK will continue to operate
even after the key is released.Tracking is closed the
moment C-MOVE is released.
• JUMP MODE resets to SINGLE as soon as power is
switched OFF.
6.2 CD SECTION
Содержание DEH-P443R
Страница 8: ...8 DEH P645R P545R P544R P443R 2 2 EXTERIOR Fig 2 ...
Страница 12: ...2 3 CD MECHANISM MODULE 12 DEH P645R P545R P544R P443R Fig 3 ...
Страница 16: ...16 DEH P645R P545R P544R P443R 1 2 3 4 1 2 3 4 D C B A A E B D A a A b A a ...
Страница 17: ...17 DEH P645R P545R P544R P443R 5 6 7 8 5 6 7 8 D C B A B C F A a A b A a Fig 5 F ...
Страница 18: ...18 DEH P645R P545R P544R P443R 1 2 3 4 1 2 3 4 D C B A A a A b A b ...
Страница 22: ...22 DEH P645R P545R P544R P443R 1 2 3 4 2 3 4 D C B A A E D A a A b A a 1 ...
Страница 23: ...23 DEH P645R P545R P544R P443R 5 6 7 8 5 6 7 D C B A B C F A a A b A a Fig 8 8 F ...
Страница 24: ...24 DEH P645R P545R P544R P443R 1 2 3 4 2 3 4 D C B A A a A b A b 1 ...
Страница 27: ...27 DEH P645R P545R P544R P443R 5 6 7 8 5 6 7 8 D C B A D b D Fig 10 ...
Страница 28: ...28 DEH P645R P545R P544R P443R 1 2 3 4 1 2 3 4 D C B A D D a D a D b ...
Страница 30: ...30 DEH P645R P545R P544R P443R 1 2 3 4 1 2 3 4 D C B A D b D a D b ...
Страница 31: ...31 DEH P645R P545R P544R P443R 5 6 7 8 5 6 7 D C B A D b D a D b 8 Fig 12 ...
Страница 35: ...35 DEH P645R P545R P544R P443R ...
Страница 36: ...36 DEH P645R P545R P544R P443R 1 2 3 4 1 2 3 4 D C B A B A B 3 4 FM AM TUNER UNIT ...
Страница 37: ...37 DEH P645R P545R P544R P443R 5 6 7 8 5 6 7 8 D C B A B Fig 13 ...
Страница 38: ...A C 38 DEH P645R P545R P544R P443R 1 2 3 4 1 2 3 4 D C B A C 3 5 KEYBOARD PCB ...
Страница 39: ...39 DEH P645R P545R P544R P443R 5 6 7 8 5 6 7 8 D C B A C Fig 14 ...
Страница 41: ...41 DEH P645R P545R P544R P443R 5 6 7 8 5 6 7 8 D C B A A Fig 15 B D F SIDE A CN701 ...
Страница 42: ...42 DEH P645R P545R P544R P443R 1 2 3 4 1 2 3 4 D C B A A TUNER AMP UNIT A ...
Страница 43: ...43 DEH P645R P545R P544R P443R 5 6 7 8 5 6 7 8 D C B A A SIDE B Fig 16 ...
Страница 45: ...45 DEH P645R P545R P544R P443R D C B A 1 2 3 4 1 2 3 B 4 SIDE B Fig 18 FM AM TUNER UNIT B ...
Страница 47: ...47 DEH P645R P545R P544R P443R D C B A 1 2 3 4 1 2 3 4 Fig 20 SIDE B D E CONTROL UNIT D ...
Страница 49: ...49 DEH P645R P545R P544R P443R D C B A 1 2 3 4 1 2 3 C 4 Fig 22 SIDE B KEYBOARD PCB C CN801 A SWITCH PCB F ...
Страница 72: ...72 DEH P645R P545R P544R P443R Grating waveform Ech Xch 20mV div AC Fch Ych 20mV div AC 45 0 75 60 30 90 ...
Страница 83: ...83 DEH P645R P545R P544R P443R ...
Страница 84: ...84 DEH P645R P545R P544R P443R 7 3 BLOCK DIAGRAM DEH P645R EW ...
Страница 85: ...85 DEH P645R P545R P544R P443R Fig 27 ...