Sony HCD-DV2D Service Manual page 20

HCD-DV2D
3. Mode: Playback
test tape
P-4-A100
(10kHz, –10dB)
set
Waveform of oscilloscope
45 °
in phase
good
4. After the adjustments, apply suitable locking compound to
the parts adjusted.
Adjustment Location: Record/Playback/Erase Head
adjustment screw
Note: Refer to " 3-13. LID TC " (see page 14)
[Tape Speed Check]
Procedure:
1. Turn the power on.
2. Insert the WS-48B into deck.
3. Press the TAPE N button of deck.
4. Check the reading of frequency counter becomes 3000 ± 90
Hz.
Sample Value of Wow and flutter
W.RMS (JIS) less than 0.3%
(test tape: WS-48B)
20
MAIN board
JK102
speaker terminal
oscilloscope
L
R
90 ° 135 ° 180 °
wrong
DVD SECTION
[RF Level Check]
Check the RF level when optical pick-up block (TRAVERSE
MECH) is replaced.
Connection:
MPEG board
TP (RF)
TP (VC)
Procedure:
1. Connect an oscilloscope to TP (RF) and TP (VC) on the MPEG
board.
2. Turn the power on.
3. Set the test disc on the tray and press DVDu button to
playback.
4. Observe the waveform of the oscilloscope, and check that the
RF level is satisfied to specified value.
[Test Disc List and Specified Value]
Use the following test disc on adjustment.
TEST DISC
CD (YEDS-18)
PART No. :3-702-101-01
DVD Single Layer (HLX-504)
PART No. :J-6090-088-A
DVD Dual Layer (HLX-505)
PART No. :J-6090-089-A
Note: Do not use existing test disc for DVD.
Checking Location: MPEG board
[MPEG BOARD]
U709
TP (RF) TP (VC)
oscilloscope
+
–
Specified Value Deviation
310 mV +30 mV/–50 mV
290 mV +25 mV/–40 mV
120 mV +20 mV/–30 mV