5-86
A
GND level
(0 Vdc)
1.
VCO Adjustment (PD-125 Board)
Mode
E-E
Signal
Arbitrary
Measurement Point
Pin
1
of CN505 on FR-157 board
(VCO CENT)
Measuring Instrument
Oscilloscope (DC range)
Adjustment Page
E
Adjustment Address
84
Specified Value
A = 1.8 ± 0.1 V
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Check that the GND level of oscilloscope.
3) Select page: E, address: 84, change the data and adjust the
voltage (A) of the VCO output to the specified value.
4) Press the PAUSE button of the adjustment remote commander.
5) Select page: 0, address: 01, and set data: 00.
Fig. 5-3-49
3-5. LCD SYSTEM ADJUSTMENTS
Note 1:
The back light (fluorescent tube) is driven by high voltage
AC power supply. Therefore, do not touch the back light
holder to avoid electrical shock.
Note 2:
When replacing the LCD unit, be careful to prevent
damages caused by static electricity.
Note 3:
Adjust the LCD BRIGHT and LCD COLOR to the center
on menu display.
[Adjusting connector]
Most of the measuring points for adjusting the LCD are
concentrated in the CN505 of FR-157 board.
The following table shows the Pin No. and signal name of the
CN505.
Pin No.
Signal Name
1
VCO_CENT
2
PSIG
3
GND
4
COM
5
VG
Fig. 5-3-48
CN505
1
5
FR-157 board