FUNAI F42PDME Service Manual page 78

(3) Adjusting the Voltage Wave form of Vramp
a. Connect oscilloscope Probe to the B37 Pin on Z PCB and the GND.
b. Turn the VR3 of Z PCB and make the "C" wave form Fig. DE7 to be 7µs.
But, in case of not setting up the Test point, produce same output and adjust wave form connect to other
pattern or parts which has no possibility of short.
5. Adjustment after Assembling
(PDP Module Adjustment)
5-1.Using Tools
(1) Digital oscilloscope: More than 200MHz
(2) DVM (Digital Multimeter): Fluke 87 or similar one
(3) Signal generator: VG-825 or similar one
(4) DC power supply
- DC power supply for Vs (1): Should be changeable more than 0-200V/ more than 10A
- DC power supply for Va (1): Should be changeable more than 0-100V/ more than 5A
- DC power supply for 5V (1): Should be changeable more than 0-10V/ more than 10A
- DC-DC Converter Jig (1): The Jig which has voltage equivalent output of PDP42V6#### Module after taking
the Vs, Va, 5V voltage
- Voltage stability of power supply: Within ±1% for Vs/Va, within ±3% for 5V
5-2. Connection diagram of measuring instrument and setting up the initial voltage
(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.
Z B/D Waveform
(Fig. DE6) Y, Z set-up Waveform
(Fig. DE7) Z ramp Waveform
2-2-6 L0605DCP