Sony MHC-V3 Service Manual page 32

MHC-V3/V4D
Ver. 1.1
CD/DVD SECTION
[TEST DISC LIST]
Use the following test disc on test mode.
• CD: YEDS-18 (PART No. 3-702-101-01)
PATD-012 (PART No. 4-225-203-01)
• DVD (SL)
NTSC HLX-503 (PART No. J-6090-069-A)
HLX-504 (PART No. J-6090-088-A)
PAL HLX-506 (PART No. J-6090-077-A)
• DVD (DL)
NTSC HLX-501 (PART No. J-6090-071-A)
HLX-505 (PART No. J-6090-089-A)
PAL HLX-507 (PART No. J-6090-078-A)
Note: When the BASE UNIT is replaced, perform the Execute
IOP measurement
(Refer to page 29).
FOCUS BIAS CHECK
ARAGON board
CN302 pin 17 (RFMON)
CN302 pin 1 (GND)
Procedure:
1. Connect the oscilloscope to CN302 pin 17 (RFMON) and
CN302 pin 1 (GND) on the ARAGON board.
2. Press the [ ] button to turn the power on, and press the
?/1
[FUNCTION] button to select CD function.
3. Set the test disc (CD: YEDS-18) on the tray and press [u]
button to playback.
4. Confi rm that oscilloscope waveform is as shown in the fi gure
below (eye pattern).
A good eye pattern means that the diamond shape () in the
center of the waveform can be clearly distinguished.
32
or
or
or
oscilloscope
(DC range)
+
–
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
level:
1.1 ± 0.25 Vp-p (DVDSL)
1.0 ± 0.25 Vp-p (CD)
Checking Location:
-ARAGON Board (CONDUCTOR SIDE)-
pin 1 (GND)
CN302
pin 17 (RFMON)