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19
HCD-DX70
Note:
Clear RF signal waveform means that the shape “
◊
” can be
clearly distinguished at the center of the waveform.
RF signal waveform
E-F Balance (1 Track jump) Check
Procedure:
1.
Connect oscilloscope to TP (TEO) and TP (DVC) board.
2.
Turned Power switch on.
3.
Load a disc (LUV-P01) and playback the number nine track.
4.
Press the
bB
button. (Becomes the 1track jump mode.)
5.
Confirm that the level B and A (DC voltage) on the oscilloscope
waveform.
1 track jump waveform
6.
Adjust RV101 so that A (DC voltage) becomes 0.
VOLT/DIV : 200mV
TIME/DIV : 500ns
level : 0.65
±
0.15Vp-p (RFDC)
1.1
±
0.4Vp-p (RFAC)
oscilloscope
BD board
TP (TEO)
TP (DVC)
+
–
DVC
Center of
waveform
B
Symmetry
A (DC voltage)
level=1.0
±
0.5Vp-p
Checking Location:
[BD BOARD]
DVC
RFAC
RFDC
FEO
TEO
Содержание HCD-DX70
Страница 28: ...HCD DX70 28 28 6 7 SCHEMATIC DIAGRAM MAIN 2 4 SECTION Page 24 Page 41 Page 29 Page 27 Page 30 ...
Страница 33: ...33 33 HCD DX70 6 13 SCHEMATIC DIAGRAM POWER AMP SECTION Page 43 Page 43 Page 30 Page 30 ...
Страница 37: ...37 37 HCD DX70 6 17 SCHEMATIC DIAGRAM SWITCH SECTION Page 35 Page 35 ...
Страница 39: ...39 39 HCD DX70 6 19 SCHEMATIC DIAGRAM LEAF SW SECTION E Page 30 4 4 ...
Страница 41: ...41 41 HCD DX70 6 21 SCHEMATIC DIAGRAMS DRIVER SECTION See page 50 for IC Block Diagrams IC B D B Page 28 2 4 ...
Страница 43: ...43 43 HCD DX70 6 23 SCHEMATIC DIAGRAM TRANS SECTION H Page 33 Page 33 ...