High-Frequency Board 15.14.286 - Selco Genesis 200 AC-DC Repair Manual

9.8) HIGH-FREQUENCY BOARD 15.14.286 (fig. 29)
This board generates series of very fast high-voltage pulses to facilitate TIG striking.
Power source
Genesis 200 TLH
Genesis 200 AC-DC
WARNING: perform checks following steps 1 and 2 in the given order!
WARNING: measurements indicated in the following table must be taken directly on bus board 15.14.285
1
/15.14.315 once HF board 15.14.286 has been removed from the machine!
Power source / Mode Component
ON
ON / TIG HF
* Note:
- this voltage remains for just 1.5 seconds once the torch trigger is pulled
- this voltage is equivalent to measuring +0.3 Vdc
WARNING:
- insert HF board 15.14.286 in the machine and connect it to bus board 15.14.285/15.14.315
2
- switch on the power source and take measurements indicated in the table below, without pulling the torch
trigger:
Power source / Mode Component
ON / TIG HF
** Note: you are advised not to take measurements on D1 whilst the torch trigger is pulled as the HF dis-
charge might damage your multimeter!
Description of boards
Unless otherwise specified, all measurements sholud be taken with the boards in their slots and connected accordingly
FN1 FN2
WHITE RED
RED WHITE
Test point
CNB2 on Bus board PIN 1
15.14.285/15.14.315
CN4 on Bus board PIN 4
15.14.285/15.14.315
directly on the HF board's connector CN1, when connected.
Test point
D1 V A
Value
5 +385 Vdc
8 +6 Vdc*
Value
K +920 Vdc
(torch trigger
not pulled)**
31