43
DVP-CX985V
1-3-2. When the 33 MHz signal appears at CPUCK
•
WAIT signal check
Observe XWAIT (pin-
yj
) of SYSCON (IC104) with an oscil-
loscope.
If it is fixed to “L” (0V).
t
Observe XAVCS0, XAVCS1,
XARPCS and XSDSPCS (pins-
y;
to
yd
).
If XAVCS0 or XAVCS1 is “L”.
t
AVD (IC403) has defec-
tive soldering or AVD is defective.
If XARPCS or XSDSPCS is “L”.
t
ARP & SERVO (IC301)
has defective soldering or ARP & SERVO is defective.
If any one of the above is not “L”.
t
XWAIT, XAVCS0,
XAVCS1, XARPCS and XSDSPCS is short-circuited or has
the defective soldering or AVD (IC403) is defective or ARP &
SERVO (IC301) is defective.
Center voltage
t
The XWAIT line has defective soldering or
is short-circuited or AVD (IC403) is defective or ARP &
SERVO (IC301) is defective or SYSCON (IC104) is defec-
tive.
•
XROMCS, XRAMCS, XAVCS0, XAVCS1, XARPCS and
XSDSPCS signal check
Observe XROMCS, XRAMCS, XAVCS0, XAVCS1,
XARPCS and XSDSPCS (pins-
tk
to
yd
) of SYSCON (IC104)
with an oscilloscope.
If they are fixed to “L” (0V) or if to center voltage
t
Check
that the ICs do not have the defective soldering or is
shortcircuited with the other signal lines or SYSCON (IC104)
is defective.
XROMCS: ROM (IC106)
XAVCS0, XAVCS1: AVD (IC403)
XARPCS, XSDSPCS: ARP & SERVO (IC301)
If the trouble symptom does not apply to any of the above phe-
nomenon, SYSCON (IC104) or ROM (IC106) is defective.
2. Test mode menu is displayed but the machine stops
when menu is selected
2-1. AVD (IC403) check
Observe SDCLKO (pin-
<zxm
) of AVD (IC403) with an oscillo-
scope.
95 MHz
t
No problem
27 MHz
t
Observe the XRST, HA, HD, XRD, XWRH and
CS signal waveform at the respective pins of AVDEC, AVD
(IC403) is defective.
If the signal is other than the above frequencies
t
AVD
(IC403) 27MHz signal line (CLKI (pin-
<zb,
), SCLKIN (pin-
<zn/
)) is short-circuited, IC mount is defective, AVD (IC403) is
defective, PLL (IC103) is defective.
2-2. INT signal check
Observe XAVDECINT, XARPINT and XSDSPINT (pins-
qh
to
qk
) of SYSCON (IC104) with an oscilloscope.
If they are fixed to “L” (0V) or fixed to the center voltage
t
Check that the ICs do not have the defective soldering, or are
short-circuited, SYSCON (IC104) is defective, or the follow-
ing ICs are not defective.
XAVDECINT: AVD (IC403)
XARPINT, XSDSPINT: ARP & SERVO (IC301)
2-3. If any abnormality cannot be confirmed by the
above-described checks, check the CS signal that
is currently output.
The CS signal other than XROMCS is being output.
t
IC
mount is defective or the IC is defective depending on the
moving CS signal.
XAVCS0, XAVCS1: AVD (IC403)
XARPCS, XSDSPCS: ARP & SERVO (IC301)
If the trouble is not applicable to any of the above phenomenon,
SYSCON (IC104) or ROM (IC106) is defective.
3. If the message “SDSP No Ack” appears after the
menu is displayed.
3-1. ARP & SERVO (IC301) clock signal check
Check frequency of CLKIN (pin-
<zb/
)
33 MHz
t
Normal
Frequency other than 33 MHz
t
CLKIN is short-circuited or
defective soldering or PLL (IC103) is defective or ARP &
SERVO (IC301) is defective
3-2. ARP & SERVO (IC301) PLL oscillation check
Observe PLCKO (pin-
ij
) of ARP & SERVO (IC301) with an
oscilloscope.
If the pin is fixed to either “L” (0V) or “H” (3.3V).
If XRST if fixed to “L”. XRST has the defective solder-
ing, In all other cases. ARP & SERVO (IC301) is defec-
tive
If it is oscillating.
HA [0 to 7] are HD [8 to 15] are short-circuited, check
XSDPIT and XSDPCS or ARP & SERVO (IC301) is de-
fective.
4. If trouble occurs at the specific item of the “Diag All
Check”.
IC mount of the NG item is defective or IC is defective.
5. Picture and audio are not output.
Check connection of CN501 and CN601
Check for the defective connection of flat cable and check of
damage of the flat cable.
6. Picture is output but audio is not output.
Check the audio data output (at pins-
wf
,
wk
, and
wl
) of AVD
(IC403)
The audio data is not output.
t
AVD (IC403) or audio
DAC (IC502) mount is defective or power supply is defec-
tive or AVD (IC403) or audio DAC (IC502) is defective.
PLL (IC103) 512fs output check
If the frequency or waveform has abnormality.
t
The sig-
nal line has defective soldering or the signal line is short-
circuited with other signal lines or PLL (IC103) is defec-
tive.
7. Audio is output but picture is not output.
Observe pins-
ej
,
ek
,
el
,
rs
,
rd
and
rf
of VDAC (IC604)
with an oscilloscope.
If the analog signal is not output.
t
The signal line has the
defective soldering or is short-circuited or parts are defective
or VDAC (IC604) is defective.
4-11-3. Drive Auto Adjustment stops due to error.
The ARP & SERVO (IC301) analog circuit of MB board is defec-
tive or RF-Amp (IC201) or M-Driver (IC202) peripheral circuit is
defective or optical pickup block is defective or flat cable connec-
tion is defective