YORK INTERNATIONAL
156
FORM 160.54-M1(503)
Diagnostics & Trou ble shoot ing
FIG. 68 –
BIT PATTERNS TEST SCREEN
00338VIP
TROUBLESHOOTING
If any of the above tests do not perform correctly as de-
scribed above, perform the applicable procedure be low:
Test Failed
:
Bit Patterns -
If the vertical bars are not straight or
if the red border is not completely visible, either the
Microboard Program Jumpers are not con
fi
g ured cor-
rect ly or for the installed Display or the Microboard is
de fec tive.
All Red, All Green, All Blue, All White or All
Black:
If these tests do not produce appropriate solid color
screens, the Display Ribbon Cable, Display In ter face
Board, Microboard or Display could be de fec tive. To
locate the defective component perform tests in the
fol low ing order:
1.
Display Ribbon Cable:
Using an Ohmmeter, perform a continuity test on
all conductors in the ribbon cable. An open circuit
would indicate the ribbon cable is defective.
2.
Display Interface Board:
Using an Ohmmeter, perform a continuity test on all
conductors of the Interface Board. An open cir cuit
would indicate the Interface Board is de fec tive.
3.
Microboard:
a. With the “All Red” test selected, the voltage at
Microboard J5-6 through J5-11 (Red drivers bits
0-5), as measured to Gnd, should be > 3.0VDC. If
not, the Microboard is defective.
b. With the “All Green” test selected, the voltage
at Microboard J5-13 through J5-18 (Green driv ers
bits 0-5), as measured to Gnd, should be >3.0VDC.
If not, the Microboard is defective.
c. With the “All Blue” test selected, the voltage at
Microboard J5-20 through J5-25 (Blue drivers bits
0-5), as measured to Grid, should be >3.0VDC. If
not, the Microboard is defective.
d. With the “All White” test selected, the voltage
at Microboard J5-6 through J5-11, J5-13 through
J5-18 and J5-20 through J5-25 should be >3.0VDC.
If not, the Microboard is defective.
e. With the “All Black” test selected, the voltage
at Microboard J5-6 through J5-1 1, J5-13 Board.
An through J5-18 and J5-20 through J25 should be
<1.0VDC. If not, the Microboard is defective.
4.
Display:
If the Display Ribbon Cable, Display Interface
Board and Microboard check OK per the above
procedures, the Display is most likely the cause of
the problem.
Summary of Contents for MAXE OPTIVIEW YK
Page 28: ...YORK INTERNATIONAL 28 FORM 160 54 M1 503 Microboard FIG 7 MICROBOARD LD07776...
Page 60: ...YORK INTERNATIONAL 60 FORM 160 54 M1 503 Keypad FIG 32 KEYPAD CONNECTOR LD04074...
Page 61: ...FORM 160 54 M1 503 61 YORK INTERNATIONAL FIG 33 KEYPAD LD04075 LD04076 8...
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