Hitachi Set Free mini-HNRQ1 Series, Service Manual

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Test Point Analog Tester Result Digital Tester Result
(+)CN28(P), (-)CN801(U1) More than 100k Ohm Over Load (OL)
(-)CN28(P), (+)CN801(U1) More than 1k Ohm 0.5V or smaller
(-)CN28(N), (+)CN801(U1) More than 100k Ohm Over Load (OL)
(+)CN28(N), (-)CN801(U1) More than 1k Ohm 0.5V or smaller
(+)CN28(P), (-)CN801(V1) More than 100k Ohm Over Load (OL)
(-)CN28(P), (+)CN801(V1) More than 1k Ohm 0.5V or smaller
(-)CN28(N), (+)CN801(V1) More than 100k Ohm Over Load (OL)
(+)CN28(N), (-)CN801(V1) More than 1k Ohm 0.5V or smaller
(+)CN28(P), (-)CN801(W1) More than 100k Ohm Over Load (OL)
(-)CN28(P), (+)CN801(W1) More than 1k Ohm 0.5V or smaller
(-)CN28(N), (+)CN801(W1) More than 100k Ohm Over Load (OL)
(+)CN28(N), (-)CN801(W1) More than 1k Ohm 0.5V or smaller
(+)CN28(P), (-)CN901(U2) More than 100k Ohm Over Load (OL)
(-)CN28(P), (+)CN901(U2) More than 1k Ohm 0.5V or smaller
(-)CN28(N), (+)CN901(U2) More than 100k Ohm Over Load (OL)
(+)CN28(N), (-)CN901(U2) More than 1k Ohm 0.5V or smaller
(+)CN28(P), (-)CN901(V2) More than 100k Ohm Over Load (OL)
(-)CN28(P), (+)CN901(V2) More than 1k Ohm 0.5V or smaller
(-)CN28(N), (+)CN901(V2) More than 100k Ohm Over Load (OL)
(+)CN28(N), (-)CN901(V2) More than 1k Ohm 0.5V or smaller
(+)CN28(P), (-)CN901(W2) More than 100k Ohm Over Load (OL)
(-)CN28(P), (+)CN901(W2) More than 1k Ohm 0.5V or smaller
(-)CN28(N), (+)CN901(W2) More than 100k Ohm Over Load (OL)
(+)CN28(N), (-)CN901(W2) More than 1k Ohm 0.5V or smaller
Note:
The positive side (+) of tester: Red; The negative side (-) of tester: Black.
(4) Checking Method for Noise Filter PCB
● Detail of Check Points
Test the resistance of FU1
，
FU2
，
FU3. If it is 0 Ohm, the fuse is OK, otherwise it is damaged.
TROUBLESHOOTING