Sony HCD-DX170 Service Manual page 26

HCD-DX150/DX170/DX250
Ver. 1.3
DVD SECTION
When the base unit is replaced, perform the adjustment and the
measurement as shown below in this order.
1) MIRROR TIME ADJUSTMENT (See page 23)
2) EXECUTING IOP MEASUREMENT (See page 25)
[TEST DISC LIST]
Be sure to use the DVD disc that matches the signal standards of
your region.
• CD
YEDS-18 (Part No.: 3-702-101-01)
PATD-012 (Part No.: 4-225-203-01)
• DVD SL (Single Layer)
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 (Dual Layer)
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)
[RF Level Check]
Connection:
DMB10 board
DMB11 board
CN105 pin 6 (RFMON)
CN105 pin 3 (GND)
Procedure:
1. Conect an oscilloscope to CN105 pin 6 (RFMON) and CN105
pin 3 (GND) on the DMB10 or DMB11 board.
2. Turn the power on.
3. Insert the CD test disc (refer to the TEST DISC LIST), and
press the H button to play the disc back.
4. Confirm that oscilloscope waveform is clear and check RF
signal level is correct or not.
Note: A clear RF signal waveform means that the shape "◊" can be
clearly distinguished at the center of the waveform.
5. Eject the CD disc, and insert the DVD SL test disk (refer to the
TEST DISC LIST), and press the H button to play the disc
back.
RF signal waveform
26
ELECTRICAL ADJSTMENT
oscilloscope
+
–
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
level: 0.57 ± 1.1 Vp-p (CD)
0.58 ± 1.23 Vp-p (DVD)
Checking Location: DMB10 board or DMB11 board (Side A)
IC104
IC102
IC101
CN106 CN105
CN105 pin 6 (RFMON)
IC201
6 1
CN105 pin 3 (GND)