Check The Set-Up Process Of B/E Μ-Com; Check Power Supply Voltages; Check Clock Waveform; Check Reset Signal - Denon DVD-2900 Service Manual

QQ (2) Check the Set-up process of B/E µ-COM.
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Check Power Supply Voltages.

• [IC102]:
+3.3V_D1, +2.5V_D1 O.K.?
O.K.

Check Clock waveform.

• [IC102]:18 pin.
27MHz (3.3V), O.K.?
O.K.

Check Reset signal.

• [IC102]:(MC-TRST) 15 pin.
"H" level O.K.?
O.K.
Check Power Supply Voltages.
• [IC101]:
+3.3V_D1, +1.8V_D1 O.K.?
O.K.
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L 13942296513
Check Clock waveform.
• [IC101]:106 pin.
27MHz (3.3V), O.K.?
O.K.
Check Clock waveform.
• [IC101]:172 pin.
24.576MHz (3.3V), O.K.?
O.K.
[IC101] Reset Check.
O.K.
Check Address,Data Bus between
[IC102] and [IC103](Flash Rom).
O.K.
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Continue to next step.
Check the Set-up process of F/E µ-COM.
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N.G.
Check the output level.
[ON/ST]:"H" level?
N.G. Check 27MHz(3.3V) at
4pin of IC105.
N.G.
N.G.
N.G.
N.G.
N.G.
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8
N.G.
O.K.
N.G.
O.K.
Check soldering
• [IC301]: 37pin.
• R310 and R311.
Check soldering
• [IC117] and [IC118]
• [FB101] and [FB102].
Q Q
3 6 7 1 3 1 5
Check soldering
• [IC105]: 3pin.
• R170, R101.
Check soldering
• [IC105]: 9pin.
• R174, R133.
Check soldering at Address,Data Bus.
• [MCD0--MCD14], [MCA11--MCA30]
co
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22
DVD-2900
9 4 2 8
Check soldering.
• [IC301]: 55pin.
Check the circumference
soldering.
• [FB108, FB109]
(1)Check soldering of X101.
(2)Check soldering of IC105
(SM8707).
Check soldering of R168
and R153.
0 5 8 2 9 9 4 2 8
m
22
9 9
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