Read Sony CX-LFA880 / XR-FA880DVD Service Manual online
16
CX-LFA880
4. After the adjustments, apply suitable locking compound to
the parts adjusted.
Adjustment Location: Record/Playback/Erase Head
[Tape Speed Check]
Procedure:
1. Turn the power on.
2. Insert the WS-48B into deck.
3. Press the TAPE bB button of deck.
4. Check the reading of frequency counter becomes 3000
2. Insert the WS-48B into deck.
3. Press the TAPE bB 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)
(test tape: WS-48B)
3. Mode: Playback
test tape
P-4-A100
(10kHz, –10dB)
P-4-A100
(10kHz, –10dB)
oscilloscope
set
Waveform of oscilloscope
in phase
45
°
90
°
135
°
180
°
good
wrong
MAIN board
JK102
speaker terminal
JK102
speaker terminal
L
R
DVD SECTION
[RF Level Check]
Check the RF level when optical pick-up block (TRAVERSE
MECH) is replaced.
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 DVDu button to
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.
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)
TP (VC)
U709
TP (RF)
TP (VC)
[MPEG BOARD]
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