The circuit around CX870 is faulty.
YES
YES
YES
YES
YES
Can an output voltage (3.3V) to
U611(DC-DC Conv.) be confirmed?
Can an output voltage (1.2V) to U608
be confirmed?
Can an output voltage (1.9V) to U903
be confirmed?
Are the versions of the Ethernet SBL and IMG displayed in Version
Check Mode?
Can a voltage (5V) be confirmed between pin 2 and pin 5 of
N6502?
Is D5V_POWER (U5001 uCOM 85pin)
"Hi" ?
Is E_POWER4 (U5001 uCOM 56pin)
"Hi" ?
Is E_POWER2 (U5001 uCOM 54pin)
"Hi" ?
The circuit of D5V_POWER between
U5001 and U611 are faulty.
The circuit of E_POWER4 between
U608 and U5001 are faulty.
The circuit of E_POWER2 between
U5001 and U903 are faulty.
The circuit around U5001(DC-DC.
Conv.) is faulty.
The circuit around U608(DC-DC.
Conv.) is faulty.
The circuit around U903(DC-DC.
Conv.) is faulty.
The Ethernet software is faulty.
The circuit between the AC inlet and N6502
is faulty. Check the SMPS PCB.
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
108
