Sony DVP-NC675P Service Manual page 78
Cd/dvd player
Hide thumbs
Also See for DVP-NC675P:
- Operating instructions manual (80 pages) ,
- Manual (51 pages) ,
- Limited warranty (1 page)
Table of Contents
Advertisement
2. Test mode menu is displayed but the machine stops
when menu is selected
2-1. AVD (IC403) check
Observe SDCLKO (pin-< z x m ) of AVD (IC403) with an
oscilloscope.
95 MHz t No problem
27 MHz t Observe the XRST, HA, HD, XRD, XWRH INT
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-< z b , ), SCLKIN (pin-
<zn/ )) is short-circuited, IC mount is defective, AVD (IC403) is
defective, PLL (IC103) is defective.
2-2. INT signal check
Observe INT0 to 2 (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 following
ICs are not defective.
INT0: AVD (IC403)
INT1, INT2: ARP & SERVO (IC301)
2-3. If any abnormality cannot be confirmed by the above-
described checks, check the CS signal that is cur-
rently output.
The CS signal other than CS0X is being output. t IC mount
is defective or the IC is defective depending on the moving CS
signal.
CS2X, CS3X: AVD (IC403)
CS4X, CS5X: ARP & SERVO (IC301)
If the trouble is not applicable to any of the above phenomenon,
SYSCON (IC104) or ROM (IC106 or IC107) is defective.
3. If the message "SDSP No Ack" appears after the menu
is displayed.
3-1. ARP & SERVO 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 soldering,
In all other cases. ARP & SERVO (IC301) is defective
If it is oscillating.
HA [0 to 7] are HD [8 to 15] are short-circuited, check
XSDSPIT and XSDSPCS or ARP & SERVO (IC301) is
defective.
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 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 (IC601) mount is defective or power supply is
defective or AVD (IC403) or audio DAC (IC601) is
defective.
PLL (IC103) 512fs output check
If the frequency or waveform has abnormality. t The signal
line has defective soldering or the signal line is short-circuited
with other signal lines or PLL (IC103) is defective.
7. Audio is output but picture is not output.
(NC615 only)
Observe pins-tg, tj, tl, ya, yd and yg of AVD (IC403) 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 AVD (IC403) is defective.
8. Audio is output but picture is not output.
(NC655P only)
Observe pins-ej, ek, el, rs, rd and rf of VDAC (IC504) 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 (IC504) is defective.
6-7-3.
Drive Auto Adjustment stops due to error.
The ARP & SERVO (IC301) analog circuit of MV-044 board is
defective or RF-Amp (IC201) or M-Driver (IC202) peripheral circuit
is defective or optical pickup block is defective or flat cable
connection is defective.
6-11
- Quick Links:
- Troubleshooting
Hide quick links:
Advertisement
Table of Contents
Troubleshooting
