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Service Technical Information
MODEL NO.
AM -C80 / F80 / C75 / F75 / F72
SUBJECT
No power REF.No. :G - A0 - 084 - E0
DATE :01. NOV. 2000
Check for the symptoms on the models concerned, and take the following countermeasures.
Power is not turned on even if a rechargeable battery or an AC adapter is connected.
And "OPEN" indication appears only when the lid of unit is opened.
Step 1: Measure resistance of R348 on the rear -panel side of main C.B. (See Fig -1) and
check that the value is 2.2M .
If the value of R348 is 100 , change the value into 2.2M .
Note that a 100 resistor is connected in parallel with a 2.2M R348 resistor.
Step 2: Remove Q303 on Mechanism side of MAIN C.B. (See Fig - 2), and re -mount Q303
in reversed direction (rotated in 180 degrees).
Check "VK" indication on Q303.
Step 3: Connect an AC adapter after taking the actions above, and leave the unit for more than
8 hours.
Fig -1 Fig -2
MAIN C.B MAIN C.B
Bottom side Mecha side
Before actions taken After actions taken
R348
Q303 Q303
G R Code No. Access Code Modified Ser. No. Parts Schedule
- - - - - -