Sony HCD-AZ1D, Руководство по обслуживанию

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20
HCD-AZ1D
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 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 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 (Side A)
+
–
MPEG board
oscilloscope
CN7 pin
8
(V-RF)
CN7 pin
wf
(GND)
[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)
TEST DISC Specified Value
CD YEDS-18 (Part No.: 3-702-101-01)
0.57 to 1.1 Vp-p
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)
0.58 to 1.23 Vp-p
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)
U2
IC7
IC4
IC6
24
23
1
2
CN7 Pin
wf
(GND)
CN7 Pin
8
(V-RF)
CN7
— MPEG Board (SIDE A) —
Note: Refer to “ 3-15. PANEL CASS ” (see page 17)
adjustment screw