79
XV-HTD1
7.1.5 TROUBLE SHOOTING
Microcomputer troubleshooting
Symptom of problem
• The power supply does not enter .
• The standby LED lights even if the
POWER key is pushed.
• It enters the state of POWER OFF
soon even in case of the POWER
ON.
• DVD does not operate at all.
• Time is not displayed in FL DISPLAY
at the DVD function.
• The operation key is not accepted at
all.
Check method
• Whether terminal RESET (11Pin) is "H" is confirmed.
The operation of the RESET circuit is confirmed if
not becoming "H".
• Whether the AC pulse is input to AC input terminal
(26Pin) is confirmed. If the AC pulse is not input,
the AC pulse generation circuit is confirmed.
• The microcomputer or the oscillation circuit is broken.
The microcomputer or the oscillation circuit is
exchanged.
• If the voltage of the 3.3DETECT (13Pin) terminal of
the microcomputer is 2.9V or less, the voltage is
adjusted to 2.9V or more.
• Whether terminal (27Pin, 83Pin, 98-100Pin) for the
communication with the DVD microcomputer does
the communication operation is confirmed. If the
communication operation is not done, whether the
B to B connector etc. are disconnected is confirmed.
• Whether "H" is output to terminal DVDRESET
(87Pin) is confirmed.
• When KEY is not pushed, whether KEY input
terminal (18Pin, 22Pin) is 5V is confirmed. If the KEY
input terminal is not 5V, whether KEY SW on the
line breaks is confirmed.
Thought cause
• The microcomputer is not reset.
• The AC pulse is not input.
• The oscillation circuit of the microcomputer
does not oscillate.
• If the function is DVD, the 3.3DETECT input
is 2.9V or less.
• It does not communicate with the DVD
microcomputer.
• It is recognized that other KEY has already
been pushed.
Содержание XV-HTD1
Страница 25: ...A B C D 5 6 7 8 5 6 7 8 25 XV HTD1 SPEAKERS MYXJ NVXJ C AUDIO SIGNAL ROUTE C SL AUDIO SIGNAL ROUTE SL H ...
Страница 42: ...A B C D 1 2 3 4 1 2 3 4 42 XV HTD1 CN5011 I 1 3 ATT7050 XTS3052 CN5012 I 1 3 CN8503 I 3 3 3 17 PRIMARY ASSY T ...
Страница 57: ...A B C D 5 6 7 8 5 6 7 8 57 XV HTD1 XNP3043 D IC5701 Q3919 Q3904 Q3903 IC8802 Q3252 Q3251 Q3253 IC3001 SIDE B I ...
Страница 65: ...A B C D 1 2 3 4 1 2 3 4 65 XV HTD1 XNP3044 C PRIMARY ASSY T SIDE B T ...
Страница 91: ...91 XV HTD1 13 11 10 14 Mecha Frame Clamper Holder Hook Spring 4 Mechanism Base Section 12 12 ...