39
CX-VX55/VX77
Ver. 1.1
SECTION 5
ELECTRICAL ADJUSTMENT
+
–
DVD board
oscilloscope
PDM01 pin
2
(RFOUT)
PDM01 pin
6
(GND PD)
Procedure:
1. Connect an oscilloscope to PDM01 pin
2
(RFOUT) and
PDM01 pin
6
(GND PD) on the DVD board.
2. Turn the power on.
3. Set the test disc (DVD: TDV-520CSO, CD: LUV-P01) on the
tray and touch the
B
button to playback.
4. Confirm that oscilloscope waveform is clear and check RFOUT
signal level is correct or not.
Note:
A clear RFOUT signal waveform means that the shape “
◊
” can be
clearly distinguished at the center of the waveform.
Checking Location: DVD board (COMPONENT SIDE)
IC5C1
IC5A1
IC501
IC506
IC505
IC201
IC202
1
11
10
2
[DVD BOARD]
(COMPONENT SIDE)
PDM01 pin
2
(RFOUT)
PDM01 pin
6
(GND PD)
PDM01
1
2
22
23
[RFMON Level Check]
Connection:
RFOUT signal waveform
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
level:
1.05
±
0.2 Vp-p (CD)
1.09
±
0.2 Vp-p (DVD)
Summary of Contents for CX-VX55
Page 16: ...16 CX VX55 VX77 Ver 1 1 3 FRONT CIRCUIT 1 2 ...
Page 17: ...17 CX VX55 VX77 Ver 1 1 4 FRONT CIRCUIT 2 2 ...
Page 19: ...19 CX VX55 VX77 Ver 1 1 2 Test debug flow ...
Page 20: ...20 CX VX55 VX77 Ver 1 1 ...
Page 21: ...21 CX VX55 VX77 Ver 1 1 ...
Page 22: ...22 CX VX55 VX77 Ver 1 1 ...
Page 23: ...23 CX VX55 VX77 Ver 1 1 ...
Page 24: ...24 CX VX55 VX77 Ver 1 1 ...
Page 28: ...28 CX VX55 VX77 Ver 1 1 2 Tray close waveform 3 Tray open waveform ...
Page 31: ...31 CX VX55 VX77 Ver 1 1 ...
Page 32: ...32 CX VX55 VX77 Ver 1 1 8 FOCUS ON WAVEFORM ...
Page 33: ...33 CX VX55 VX77 Ver 1 1 9 SPINDLE CONTROL WAVEFORM NO DISC CONDITION ...
Page 34: ...34 CX VX55 VX77 Ver 1 1 10 TRACKING CONTROL RELATED SIGNAL SYSTEM CHECKING ...
Page 35: ...35 CX VX55 VX77 Ver 1 1 11 RF WAVEFORM 12 MT1379 AUDIO OPTICAL AND COAXIAL OUTPUT ASPDIF ...
Page 36: ...36 CX VX55 VX77 Ver 1 1 13 MT1379 VIDEO OUTPUT WAVEFORM 1 Full colorbar signal CVBS 2 Y ...
Page 37: ...37 CX VX55 VX77 Ver 1 1 3 C 14 AUDIO OUTPUT FORM AUDIO DAC 1 Audio related Signal ...
Page 40: ...40 CX VX55 VX77 Ver 1 1 MEMO ...