Dvd Trouble Shooting - Pioneer XV-EV9 Service Manual

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7.1.8 DVD TROUBLE SHOOTING

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No. Symptoms
1 The power is not turned on. Are wires of output connector (MAIN Assy) and CN901 (DVDM Assy)
An opening screen is not
2
displayed on the monitor
(The FL display lights. The
mechanism does not work.)
TE
L 13942296513
An opening screen is not
3
displayed on the monitor
(The FL display lights. The
mechanism works.)
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disconnected or damaged ?
Check that the following voltage is output :
Q1202-source on the DVDM Assy: 3.3V
Are the signals output from IC201-pin 97 (MDATA) and pin 98 (SCLK)
on the DVDM Assy ? (in the range of 0-3V)
Are the signals input into IC5501-pin 24 (MDATA) and pin 25 (SCLK)
on the DVDM Assy ? (in the range of 0-3V)
Check that the following voltage are output :
Q1302-collector on the DVDM Assy: 5V
Is a resonator (X201: 27MHz) on the DVDM Assy oscillating ?
• Is a signal input into IC203-pin26 (PCE#) on the 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 DVDM Assy ?
(Is a signal fluctuating ?)
→ Communication with SDRAM
Is a signal output from IC203-pin 28 (PRD#) on the 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 DVDM
Assy ? (Is a signal fluctuating ?)
→ Communication with FL Control IC
Is a signal output from IC5501-pin 78 (XREADY) on the DVDM Assy ?
(Is a signal fluctuating in the range of 0-5V ?)
Are the signals output from IC5501-pin 23 (SDATA) on the DVDM Assy
? (in the range of 0-5V)
Are the signals of IC204-pin 5 (SDA) and pin 6 (SCL) on the DVDM
Assy fluctuating for one or two seconds after the power is turned?
Check the video signal path between DVD IC (DVDM Assy IC201) and
video-out terminal (see the block diagram)
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Diagnosis Contents
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XV-EV9
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Possible Defective Points
Connector / cable
DVDM Assy
DVDM Assy
DVD IC (IC201)
MAIN Assy
UCOM (IC5501)
DVDM Assy
5V Regulator IC (IC751)
DVDM Assy
Crystal resonator (X201)
DVD IC (IC201)
DVDM Assy
DVD IC (IC201)
Flash ROM (IC203)
SDRAM (IC202)
DVDM Assy
Flash ROM (IC203)
DVDM Assy
0 5 8 2 9 9 4 2 8
DVD IC (IC201)
UCOM (IC5501)
DVDM Assy
UCOM (IC5501)
DVDM Assy
DVD IC (IC201)
MAIN Assy
UCOM (IC5501)
DVDM Assy
EEPROM (IC204)
DVDM Assy
Video circuit after DVD IC
(IC201)
m
9 9
A
B
C
9 9
D
E
F
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