Trouble Shooting Chart; Failures Of The Illumination, Lamps And Power System Generally - Wurlitzer One More Time Vinyl Operating Instructions Manual

Failures of the illumination, lamps and power system generally

18

Trouble shooting chart

18.1 Failures of the illumination, lamps and power system generally
Symptom
No light, jukebox not working
!
at all
Fluorescent tubes do not light,
!
jukebox working
One or more of the lights of
!
the display do not light up,
jukebox working
All lights of the display are
!
dark, jukebox working
Digital display remains dark,
!
jukebox working
Digital display shows nonsens
!
figures
Digital display shows
!
incomplete figures (missing
segment)
The fault is the same with all
three digits.
Digital display shows
!
incomplete figures (missing
segment)
The fault, however, occurs
with one of the three digits
only
One of the digits of the display
!
completely off
18
Cause
No power at wall socket
!
Open primary circuit
!
defective circuit, refer to
!
chapter 18.9.1, on page 25
Lamps' circuit open
!
Supply or common return of
!
lamps' circuit open
Display signal circuit
!
interrupted
Signal lines interchanged
!
Signal for one (or more)
!
segments missing
Segment signal does not
!
reach this digit
Multiplex signal missing
!
Possible faults
House fuse blown.
!
Mains switch off or defective.
!
Fuse of the jukebox Si1 blown, refer to
!
chapter 18.2, on page 19
Defective power cord or plug
!
Lamps circuit plug not in light socket at
!
amplifier
Tube not properly seated in holder
!
Defective starter, defective tube
!
Bulb defective
!
Defective lamp socket
!
Defective plug BROWN or its wiring
!
resp.
Defect inside the S&CC, e.g. lamp
!
driver transistor
Plug to the digital lights
!
Wire +30v broken (plug BROWN, pole
!
6, white line)
External short in lamps circuit has
!
tripped T5 (inside S&CC), this disables
IC14 to protect lamp driver transistors
Lamps of too high current rating
!
No 30VAC S&CC supply via pole 1,
!
plug RED, 30v rectifier D7 defective
(this, however, disables the coin
acceptance also)
14-pole D.I.L. plug not in place or wrong
!
way round
14-pole D.I.L. plug to display displaced
!
not in line with base
S&CC defective, e.g. IC23
!
One (or more) of 14-pole plug(s) broken
!
off
One (or more) wire(s) of flat cable
!
broken
Broken connection at display PC-board
!
S&CC defective, e.g. IC23
!
Cracked conductor on display PC-board
!
Defective display unit (3 identical one-
!
digit units)
Defective plug to display or broken wire
!
(A1, A2, A3)
S&CC defective (T6, T7, T8)
!
Defective display element
!
OMT VINYL – edition: 13.08.2007