Star Tech Journal

Hantarex MTC 9000
Blank Screen
Wells Gardner
19K4604 Vertical
Phillip Del Grosso
Alpha Amusements, Inc.
Warren, Michigan
Erwin H. Boot
Automatic Music Company
Hobart, Tasmania
SYMPTOM
Blank screen - no high voltage. This applies
to all Hantarex monitors Model MTC 9000.
SYMPTOM
Partial vertical collapse or small frame.
All transistors in B+ regulation section
check good, as well as TRIS horizontal out-
put. Rl05 turns into a toaster element, and
the chassis becomes a sandy beach.
CURE
Watch out for this one gang! This is my third
Hantarex Model MTC 9000 that has done
this. The problem is the EIIT (flyback) trans-
former. TH2 Hantarex PN 28026030. This
baby is gone south. If you look close, you
might notice a nice little hole punched
through the case along with a bit of melted
plastic near the ferrite core. Better order an
extra one for stock.
SOLUTION
Check resistor R3 l 7 on the top right hand
side of the "\TERI"' board; it should be 2.2
ohms and is probably open circuit.
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MURPHY'S
LAw # 1203
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