FUNAI F42PDME Service Manual page 77

4-2. Connection diagram of measuring instrument and setting up the initial voltage
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(1) The power of the signal generator should be turned on before turning on the power of DC power supply.
(2) The voltage of DC power supply, in standard of Module input voltage, should be preset as below.
Vcc: 5V, Va: 65V, Vs: 185V
(3) The power of power supply must turned on by this sequence. Reverse direction when turning off.
* Module on: 5V
(4) Signal generator should be selected with 852*480(WVGA) mode.
(1) Connection diagram of measuring instrument
Refer to Fig. DE5. (Connection diagram of measuring instrument that adjusting the voltage wave form)
(2) Setting up the initial voltage
Initially setting up voltage: Vcc: 5V, Va: 65V, Vs: 185V
But, Initially setting up voltage can be changed by the set up range according to the Module's characteristic.
4-3. How to Adjust
(1) Adjusting the Voltage Wave form of Vsetup
a. Connect measuring instrument like the connection diagram Fig. DE5.
b. Turn on the power of the measuring instrument like the <Caution> item Fig. DE5.
c. Connect the oscilloscope probe to P4 connecter(80 Pin) of Y-SUS PCB and GND.
d. Turn the VR1 of Y-SUS PCB and make the "A" wave form Fig. DE6 to be 20±1µs.
(2) Adjusting Vset-down Voltage Wave form
Turn the VR2 of Y-SUS PCB and make the "B" wave form Fig. DE6 to be 150±5µs.
P5
Y - SUS
P6
CONTROLLER
X Lef t
Signal Generator(VG-825)
Va Vs, Module off: Vs
Fig. DE5 (Connection diagram of measuring instrument)
5 1. 5
DC Power Supply for 5V
65 0. 1
DC Power Supply for Va
Power 185 1. 0
DC Power Supply for Vs
<Caution>
Va 5V
2-2-5
P1
Z - SUS
X rig ht
vo lt ag e
vo lt ag e
vo lt ag e
L0605DCP