T
r o u b l e s h o o T i n g
T
r e e s
• E
l E c t r i c
c
o m b i t h E r m
c
o m b i
t
o u c h
t
E c h n i c a l
S
E r v i c E
m
a n u a l
• D 2
T r o u b l e s h o o T i n g T r e e s
E S — U n i t D e a d — N o D i s p l a y a n d N o O p e r a t i o n
Is there correct line voltage
across the main terminal
block?
Is there voltage across the
bottom of the F-1 and F-2
6.3A fuse terminal block?
Is there voltage across the
top of the F-1 and F-2 6.3A
fuse terminal block?
Check cord breaker /
outlet / cord connection —
Reset / Repair / Connect
No
Yes
Yes
No
Correct wiring issue
between main terminal
block and 6.3A fuses.
No
Yes
Replace blown
6.3A fuse(s).
Correct wiring issue between
6.3A fuse block and X-11-132 and
X-11-130 terminal block.
Is there voltage across
terminals 418 and 318 at
the X-11-132 and X-11-130
terminal block?
No
Is there voltage across the
L-1 and N terminals of the
power supply boards(s)?
Correct wiring issue
between the X-11-130 and
X-11-132 terminal blocks
and the Power Supply
Board(s).
Is the On/Off board
(BA-34778) plugged into
the display board?
Repair connection issue.
Is there 12 VDC across
the V+ and V- terminals
of the power supply
board(s)?
Replace faulty power
supply board(s).
Is there 12 VDC at the X-10
terminal of the Display
Board?
Correct wiring issue
between power supply
board and display board.
Is X-11 plug connected at
both ends (display board
and power button board)?
Repair connection issue.
Repair
connection issue.
Is the power connection
plugged in at the RB board?
In service mode, verify DB and RB software version.
If no RB version listed, perform software update.
No
Yes
Yes
No
No
Yes
Yes
Yes
No
Yes
No
No
Yes
Summary of Contents for CombiTouch 7.14es
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