Canon EOS 7 Service Manual page 106

Part 3: Repair Information
1.3 C
AUTIONS FOR
• After removing the top cover unit, do not apply pressure against the flexible boards.
• Before disassembly, see how the lead wires are routed.
• As a general rule, reassemble by following the disassembly procedure in reverse.
• During the procedure, take adequate measures against static charge.
• When using the service battery, be sure to note the positive and negative contacts.
1.4 O
PERATION IN
Operation check after disassembling is possible in no Top Cover Ass'y state.
• Camera mode: Full-auto
• be stop condition: Slower shutter speed than 1/125 second.
1.5 T
EMPORARY
For a temporary countermeasure against malfunction of the mode dial, the small flex
(Fig. 3-3) or the PCB with a capacitor (Fig. 3-4) has been installed at the back of the
Mode Dial (command dial PCB) in the Front Cover Ass'y. The service part Top Cover
Ass'y has either of those parts.
For a temporary countermeasure for malfunction of the back cover release latch, a
capacitor has been installed to the soldered portion on the BP flex. If the capacitor is
removed for the DX flex or BP flex replacement, resolder it as it was.
Above two countermeasure are related with the DSP PCB Ass'y, and they will no longer
used if the DSP PCB Ass'y is changed to the new type.
The infomation about permanent countermeasure will be announced in Service Manual
Report when they are taken.
Fig. 3-3 Small flex
D
ISASSEMBLY AND
N T C A
O OP OVER SS
T T
REATMENT FOR OP
Small flex
Capacitor
Fig. 3-5 BP FPC
3-2
R
EASSEMBLY
' S
Y TATE
C A '
OVER SS Y AND
Dial board
(The board shown in Fig. 3-3 is the normal one.)
Fig. 3-4 Dial board
BP FPC
BP FPC S
ECTION