Canon EOS 7 Service Manual page 101

Part 2: Technical Information
<Mechanical-Related Errors>
Error No.
14 Failed phase
switching (faulty
POCH signal).
15 (Blank)
16 The POPCNTR
signal does not
come during flash
pop-up control.
Error
q During the phase switching operation (Lo-wind)
before autoloading, the Lo-wind phase (POCH) is
not established within 300 ms after the phase
switching operation starts (M2 motor runs in
reverse).
w During the phase switching operation (Hi-wind)
before autoloading, the Hi-wind phase (POCH) is
not established within 300 ms after the phase
switching operation starts (M2 motor runs in
reverse).
e During the phase switching operation (Rew) before
film rewind, the Rew phase (POCH) is not
established within 300 ms after the phase
switching operation starts (M2 motor runs in
reverse).
r During the phase switching operation (Lo-wind)
when film rewind ends, the Lo-wind phase
(POCH) is not established within 300 ms after the
phase switching operation starts (M2 motor runs in
reverse).
t During the Hi-Lo switching operation before the
film advances at shutter release, the Hi-wind phase
(POCH) is not established within 300 ms after the
phase switching operation starts (M2 motor runs in
reverse).
y During the Hi-Lo switching operation before the
film advances at shutter release, the Lo-wind phase
(POCH) is not established within 300 ms after the
phase switching operation starts (M2 motor runs in
reverse).
The POPCNTR signal does not switchover within
2000 ms after the built-in flash's pop-up operation
starts (M2 motor runs forward).
Condition
2-34
Probable Cause
Faulty phase
switch in the drive
transmission
system.
Faulty phase
switch in the drive
transmission
system.
Faulty phase
switch in the drive
transmission
system.
Faulty phase
switch in the drive
transmission
system.
Faulty phase
switch in the drive
transmission
system.
Faulty phase
switch in the drive
transmission
system.
The built-in flash's
pop-up system is
faulty.