Changed Q3 and Q9 with no success. They tested perfect so i didnt thing that was it. Anything else I should check. Nothing burnt, and all solder is reflowed as there was cold joints on header.

#4 5 years ago

BTF

PinballManiac40

Pinside+ Frequent

14y 234K 17,629 104

Keep on reading section 5.12.2.8. Resistors can measure out of spec with no visible sign of damage.

#5 5 years ago

???

jj44114

Pinside member

8y 56,050 1,862 19

Check the 100k resistor for that digit. They often fail.

#6 5 years ago

BTF

PinballManiac40

Pinside+ Frequent

14y 234K 17,629 104

Quoted from jj44114:
Check the 100k resistor for that digit. They often fail.

These are in the row close to the glass.

#7 5 years ago

???

Fordiesel69

Pinside member

Unknown

8y 45,400 363 26

R5 was open. Looked perfect. Two of my brand new ones were open too...

#8 5 years ago

JHG

Barakawins1

Inactive member

Woodcliff Lake, NJ

9y 69,300 2,113 3

Yes it’s a resistor failure for sure. You have to pull from circuit and test

#9 5 years ago

BTF

PinballManiac40

Pinside+ Frequent

14y 234K 17,629 104

When you compare the resistance on all the 100k reaistors on the board, it will be very noticable. Resistance goes higher as the resistor fail.

#10 5 years ago

WOT

Atari_Daze

Spd

Houston, TX

7y 141K 10,053 7

Quoted from Barakawins1:
You have to pull from circuit and test

Thought that was for a diode, not resistor?

#11 5 years ago

JHG

Barakawins1

Inactive member

Woodcliff Lake, NJ

9y 69,300 2,113 3

Sometimes resistors test funny in circuit. I always pull one leg. It should be a 100k ohm resistor.

#12 5 years ago

???

jj44114

Pinside member

8y 56,050 1,862 19

The 100k resistors can be tested in circuit. Any where between 80k and 130k is fine. They fail by burning and going open or having very high resistance.

#13 5 years ago

AMR

BigAl56

Pinside+ Frequent

Palatine, IL

7y 64,800 1,658

Does the problem move if you swap the display with another?

#14 5 years ago

???

Fordiesel69

Pinside member

Unknown

8y 45,400 363 26

I replaced R5 and all is well. Thanks.

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