Dvd Trouble Shooting - Pioneer XV-DV580 Service Manual

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5.2 DVD TROUBLE SHOOTING

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A Symptoms that may occur when any of the following ICs is in failure
IC
EEP ROM
(08 DVDM Assy : IC204)
Flash ROM
(08 DVDM Assy : IC203)
DVD IC
(08 DVDM Assy : IC201)
64M SDRAM
B
(08 DVDM Assy : IC202)
No. Symptoms
1 The power is not turned on. Are wires of output connector (POWER SUPPLY Unit) and CN968 (08
An opening screen is not
2
displayed on the monitor
C
(The FL display lights. The
mechanism does not work.)
TE
L 13942296513
D
E
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3 An opening screen is not
F
displayed on the monitor
(The FL display lights. The
mechanism works.)
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User's data cannot be stored in memory.
The ID number is lost.
The power cannot be turned on.
Downloading of the firmware cannot be performed.
Any kind of symptoms (no power, a failure in any of the servo, video and audio systems, USB etc.) may be
generated, because the DVD processing is performed by a single chip.
No power.
Block noise is generated during playback.
Diagnosis Contents
DVDM Assy) disconnected or damaged ?
Check that the following voltage is output :
CN968-pin 24 or pin 25 (08 DVDM Assy): 3.3 V
Are the signals output from IC201-pin 97 (MDATA) and pin 98 (SCLK)
on the 08 DVDM Assy ? (in the range of 0 - 3 V)
Are the signals input into IC5501-pin 50 (MDATA) and pin 51 (SCLK) on
the SYSMAIN Assy ? (in the range of 0 - 3V)
Check that the following voltage are output :
Q1302-collector on the SYSMAIN Assy: 5V
Is a resonator (X201: 27 MHz) on the 08 DVDM Assy oscillating ?
• Is a signal input into IC203-pin26 (PCE#) on the 08 DVDM Assy ?
(Is a signal "H" for 80 ms and then "L" after the power is turned on ?)
-> Communication with flash ROM.
• Are the signals input into IC202-pin 16 (DWE#), pin 19 (DCS#)
and pin 38 (SDCLK) on the 08 DVDM Assy ?
(Is a signal fluctuating ?)
-> Communication with SDRAM
Is a signal output from IC203-pin 28 (PRD#) on the 08 DVDM Assy?
(Is a signal fluctuating for several hundred ms after the power is turned
on ?)
Is a signal input into IC5501-pin 67 (DVD ACK) on the SYSMAIN
Assy ? (Is a signal fluctuating ?)
-> Communication with FL Control IC
Is a signal output from IC5501-pin 78 (XREADY) on the SYSMAIN Assy
? (Is a signal fluctuating in the range of 0-5V ?)
Are the signals output from IC5501-pin 49 (SDATA) on the SYSMAIN
Assy ? (in the range of 0-5V)
Are the signals of IC204-pin 5 (SDA) and pin 6 (SCL) on the 08 DVDM
x ao
Assy fluctuating for one or two seconds after the power is turned?
y
. i
Check the video signal path between DVD IC (08 DVDM Assy IC201)
and video-out terminal (see the block diagram)
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Symptoms
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XV-DV575
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Possible Defective Points
Connector / cable
POWER SUPPLY Unit
08 DVDM Assy
DVD IC (IC201)
SYSMAIN Assy
UCOM (IC5501)
POWER SUPPLY Unit /
1 5 0 5 8 2 9 9 4
SYSMAIN Assy Q1302
08 DVDM Assy
Crystal resonator (X201)
DVD IC (IC201)
08 DVDM Assy
DVD IC (IC201)
Flash ROM (IC203)
SDRAM (IC202)
08 DVDM Assy
Flash ROM (IC203)
08 DVDM Assy
DVD IC (IC201)
SYSMAIN Assy
UCOM (IC5501)
SYSMAIN Assy
UCOM (IC5501)
08 DVDM Assy
DVD IC (IC201)
SYSMAIN Assy
UCOM (IC5501)
m
08 DVDM Assy
co
EEPROM (IC204)
08 DVDM Assy
Video circuit after DVD IC
(IC201)
4
9 9
2 8 9 9