20
HCD-DV2D
4. After the adjustments, apply suitable locking compound to
the parts adjusted.
Adjustment Location: Record/Playback/Erase Head
3. Mode: Playback
test tape
P-4-A100
(10kHz, –10dB)
oscilloscope
set
Waveform of oscilloscope
in phase
45
°
90
°
135
°
180
°
good
wrong
MAIN board
JK102
speaker terminal
L
R
DVD SECTION
[RF Level Check]
Check the RF level when optical pick-up block (TRAVERSE
MECH) is replaced.
Connection:
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 DVD
u
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.
Note:
Do not use existing test disc for DVD.
Checking Location: MPEG board
TEST DISC
Specified Value
Deviation
CD (YEDS-18)
310 mV
+30 mV/–50 mV
PART No. :3-702-101-01
DVD Single Layer (HLX-504)
290 mV
+25 mV/–40 mV
PART No. :J-6090-088-A
DVD Dual Layer (HLX-505)
120 mV
+20 mV/–30 mV
PART No. :J-6090-089-A
+
–
MPEG board
oscilloscope
TP (RF)
TP (VC)
U709
TP (RF)
TP (VC)
[MPEG BOARD]
[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)
Note: Refer to “ 3-13. LID TC ” (see page 14)
adjustment screw
