Read Panasonic WJ-SX150 / WJ-SX150A Service Manual online
– 2-5 –
ADJUSTMENT PROCEDURE
1. Test Equipments Required
8
The following Test Equipments are required for
adjustment of the Matrix Switcher WJ-SX150/WJ-SX150A.
8
Frequency Counter
8
Digital Volt Meter
8
Ceramic Screwdriver
2. Disassembling Procedure for the
Adjustment
8
Referring to Fig. 2-1, remove eleven screws that secure
the Upper Cover and remove the Upper Cover.
Fig. 2-1
3. Adjustment Procedure
8
Refer to the Location of Test Points and Adjusting
Controls on the page 2-6.
(1). Power Supply Voltage Adjustment
Test Point:
F1 (+5V)
Main Board
Adjust:
VR1 (+5V)
Power Board
8
Connect the Digital Voltmeter to the terminal of F1 at the
opposite side of CN15 as shown in Fig. 3-1.
8
Adjust VR1 to obtain +5.10 V
V DC.
Fig. 3-1
(2). Real Time Clock Frequency Adjustment
Test Point:
TP1 (RTC)
Main Board
Adjust:
CT1 (RTC)
Main Board
8
Connect the Frequency Counter to TP1.
8
Adjust CT1 so that the frequency at TP1 becomes
32 768.50 Hz ± 0.03 Hz.
(3). V-Sync Frequency Adjustment
Test Point:
TP901 (V-SYNC)
Main Board
Adjust:
CT901 (V-SYNC)
Main Board
8
Connect the Frequency Counter to TP901.
8
Adjust CT901 so that the frequency at TP901 becomes
59.940 052 Hz ± 0.001 618 Hz (for NTSC Model) or
50.000 000 Hz ± 0.001 350 Hz (for PAL Model).
+ 0.00
– 0.05
– 0.05
Remove eleven screws.
Upper Cover
MAIN BOARD (Component Side)
CN15
F1
F4
F2
F3
Terminal at the opposite
side of CN15
side of CN15
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