Hitachi YUTAKI Series - Checking Procedure for Main Parts; RHUE-(3~6)AVHN. Procedure for Checking the DIP-IPM

Troubleshooting
Service Manual
218
Checking procedure for main parts
SMGB0066 rev.0 - 12/2009
DIP-IPM
Connecting Wires
Electrical
soldering iron
Plug

 
High voltage discharge is an imperative work for replacing
parts.

warning
Electrical hazard. Risk of electrical shock. Perform this high -
voltage discharge work to avoid an electric shock.
Turn OFF the main switches and wait for three 1.
minutes. Make sure that no high voltage exists. If
LED201 is ON after start-up and LED201 is OFF after
turningOFFpowersource,thevoltagewilldecrease
lower than DC50V.
Connect connecting wires to an electrical soldering iron2.
Connectthewirestoterminals,PandNonDIP-IPM.3.
=>Dischargingisstarted,resultinginhotsoldering
iron. Pay attention not to short-circuit between terminal
P(+) and N(-)
Wait for 2 or 3 minutes and measure the voltage once 4.
again. Check to ensure that no voltage is charged.
 
InternalcircuitofrectiedpartofDIP-IPM
Non-faultyif[1]–[8]arecheckedandsatised.(Measure
with1kΩrangeofatester.)

note
DO NOT use a digital tester. -
Touch[+]ofthetestertoDIP-IPM52Cterminal,and[-]1.
toDIP-IPMR,Sterminalstomeasuretheresistance.
Normalifallthreeterminalshave1kΩorgreater.
Contraryto[1],touch[-]ofthetestertoDIP-IPM52C2.
terminal,and[+]toDIP-IPMR,Sterminalstomeasure
the resistance.
Normalifallthreeterminalshave100kΩorgreater.
Touch [-] of the tester to [-] of DIP-IPM DMI (soldered 3.
part),and[+]ofthetestertoDIP-IPMR,Sterminalsto
measure the resistance.
Normalifallthreeterminalshave1kΩorgreater
Contraryto[3],touch[+]ofthetesterto[-]ofDIP-IPM4.
DMI,and[-]ofthetestertoDIP-IPMR,Sterminalsto
measure the resistance. Normal if all three terminals
have100kΩorgreater.
Contactwithspeciedterminals
to measure.
Tester