Sony HCD-PZ1D, Руководство по обслуживанию

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HCD-PZ1D
HCD-PZ1D
33 33
VIDEO SECTION
Video Level Check (VIDEO BOARD)
Purpose
This adjustment is made to satisfy the NTSC standard, and if not
adjusted correctly, the brightness will be too large or small.
oscilloscope
set
J1502
VIDEO OUT
75
:
+
–
Procedure:
1. Connect oscilloscope to VIDEO OUT jack.
2. Load a DVD reference disc playback.
3. Check the video signal level is 1.00 ± 0.07 Vp-p.
1.00 ± 0.07 Vp-p
(WHITE 100%)
SECTION 4
ELECTRICAL CHECKS
DVD SECTION
When the optical pick-up assy is replaced, perform the “Execute
IOP Measurement”.
Execute IOP Measurement (See page 30)
TEST DISC LIST
Be sure to use the DVD disc that matches the signal standards of
your region.
• 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)
HLX-504 (Part No. J-6090-088-A)
PAL : HLX-506 (Part No. J-6090-077-A)
• DVD DL (Double 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)
RFMON Level Check
Connection:
+
– CN105 pin
6
(RFMON)
CN105 pin
3
(GND)
oscilloscope
DMB19 board
Procedure:
1. Connect an oscilloscope to CN105 pin
6
(RFMON) and
CN105 pin
3
(GND) on the DMB19 board.
2. Turn the power on.
3. Set the test disc (refer to the TEST DISC LIST) on the tray and
press the [
N
] button to playback.
4. Con fi rm that oscilloscope waveform is clear and check RF-
MON signal level is correct or not.
Note: A clear RFMON signal waveform means that the shape “ ◊ ” can be
clearly distinguished at the center of the waveform.
RFMON signal waveform
VOLT/DIV: 200 mV
TIME/DIV: 500 nS
level: 0.58 ± 1.23 Vp-p (DVD)
0.57 ± 1.1 Vp-p (CD)
Checking Location: DMB19 board (Side A)
CN105 pin
3
(GND)
CN105 pin
6
(RFMON)
– DMB19 BOARD (SIDE A) –
IC104
CN105
CN1104
IC101
CN1
103
TUNER SECTION
FM Tune Level Check
set
signal
generator
Procedure:
1. Turn on the set.
2. Input the following signal from signal generator to FM antenna
input directly.
Carrier frequency: A = 87.5 MHz, B = 98 MHz, C = 108 MHz
Deviation : 75 kHz
Modulation : 1 kHz
ANT input : 35 dB
μ
(EMF)
Note: Use 75 ohm coaxial cable to connect signal generator and the set.
You cannot use video cable for checking.
Use signal generator whose output impedance is 75 ohm.
3. Set to FM tuner function and tune A, B and C signals.
4. Con
fi rm “TUNED” is lit on the display for A, B and C signals.
When the selected station signal is received in good condition,
“TUNED” is displayed.