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3.2 Check the B/E microprocessor
Are the +3.3V_D1 and +2.5V_D2 of Q102 voltage lines normal? OK
NG
Check the soldering of Q117 and Q116, and the input/output voltage. NG OK Input voltage is OK: Check the soldering of circumference components of Q102. Soldering is OK: Replace Q117 or Q116. Refer to �1. POWER SUPPLY PCB�.
Is the clock waveform of 18pin on Q102 normal? (27MHz. 2Vp-p) OK
NG
Check the waveform of 4pin on Q105. (27MHz 2Vp-p) NG OK Check the soldering of R168 and R153. Check the soldering of X101, circumference components and Q105.
Is the 15pin of Q102 H? OK Are the +3.3V_D1 and +1.8V_D1 of Q101 voltage lines normal? OK
NG
Check the soldering of QU01 (28pin), R156 and C161.
NG
Check the soldering of Q118, and the input/output voltage. OK Input voltage is OK: Check the soldering of Q101. Soldering is OK: Replace Q118.
Is the clock waveform of 18pin on Q106 normal? (27MHz. 2Vp-p) OK
NG
Check the waveform of 3pin on Q105. (27MHz 2Vp-p) NG OK Check the soldering of R170 and R101. Check the soldering of X101, circumference components and Q105.
