Sony HCD-DX2D Service Manual page 19

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3 7 63 1515 0
3. Mode: Playback
test tape
P-4-A100
(10kHz, –10dB)
in phase
4. After the adjustments, apply suitable locking compound to
the parts adjusted.
Adjustment Location: Record/Playback/Erase Head
TE
L 13942296513
adjustment screw
Note: Refer to "3-12. PANEL CASS (CASSETTE)" (see page 16)
[Tape Speed Check]
Procedure:
1. Turn the power on.
2. Insert the WS-48B into deck.
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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)
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MAIN board
JK102
speaker terminal
oscilloscope
L
set
R
Waveform of oscilloscope
45 ° 90 ° 135 ° 180 °
good wrong
x ao
y
i
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8
DVD SECTION
[RF Level Check]
Check the RF level when optical pick-up block is replaced.
Connection:
Procedure:
1. Connect an oscilloscope to CN7 pin 8 (V-RF) and CN7 pin
wf (GND) 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.
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)
Q Q
HLX-504 (Part No.: J-6090-088-A)
3 6 7 1 3
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)
Note: Do not use existing test disc for DVD.
Checking Location: MPEG board (Side A)
— MPEG Board (SIDE A) —
CN7 Pin wf (GND)
IC6
u163
.
2 9 9 4 2 8
oscilloscope
MPEG board
CN7 pin 8 (V-RF)
CN7 pin wf (GND)
TEST DISC
1 5 0 5 8 2 9 9 4
CN7
1
23
24
2
CN7 Pin 8 (V-RF)
U2
IC4
m
co
HCD-DX2D
Ver. 1.2
9 9
+
–
Specified Value
0.57 to 1.1 Vp-p
2 8 9 9
0.58 to 1.23 Vp-p
IC7
19