Dvd Trouble Shooting - Pioneer XV-DV353 Service Manual

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7.1.8 DVD TROUBLE SHOOTING

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No. Symptoms
A 1 The power is not turned on. Are wires of output connector (POWER SUPPLY Unit) and CN1001
2 An opening screen is not
displayed on the monitor
(The FL display lights. The
mechanism does not work.)
B
C
TE
L 13942296513
D
An opening screen is not
3
displayed on the monitor
(The FL display lights. The
mechanism works.)
E
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Diagnosis Contents
(DVDMAIN Assy) disconnected or damaged ?
Check that the following voltage is output :
Q1202-source on the DVDMAIN Assy: 3.3V
Are the signals output from IC201-pin 97 (MDATA) and pin 98 (SCLK)
on the DVDMAIN Assy ? (in the range of 0-3V)
Are the signals input into IC5501-pin 50 (MDATA) and pin 51 (SCLK)
on the DVDMAIN Assy ? (in the range of 0-3V)
Check that the following voltage are output :
Q1302-collector on the DVDMAIN Assy: 5V
Is a resonator (X201: 27MHz) on the DVDMAIN Assy oscillating ?
• Is a signal input into IC203-pin26 (PCE#) on the DVDMAIN 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 DVDMAIN Assy ?
(Is a signal fluctuating ?)
→ Communication with SDRAM
Is a signal output from IC203-pin 28 (PRD#) on the DVDMAIN 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 DVDMAIN
Assy ? (Is a signal fluctuating ?)
→ Communication with FL Control IC
Is a signal output from IC5501-pin 78 (XREADY) on the DVD MAIN
Assy ? (Is a signal fluctuating in the range of 0-5V ?)
Are the signals output from IC5501-pin 49 (SDATA) on the DVD MAIN
Assy ? (in the range of 0-5V)
Are the signals of IC204-pin 5 (SDA) and pin 6 (SCL) on the DVD
MAIN Assy fluctuating for one or two seconds after the power is
turned?
Check the video signal path between DVD IC (DVDMAIN Assy IC201)
and video-out terminal (see the block diagram)
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XV-DV353
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Possible Defective Points
Connector / cable
POWER SUPPLY Unit
DVDMAIN Assy
DVD IC (IC201)
DVDMAIN Assy
UCOM (IC5501)
DVDMAIN Assy
5V Regulator IC (IC751)
DVDMAIN Assy
Crystal resonator (X201)
DVD IC (IC201)
DVDMAIN Assy
DVD IC (IC201)
Flash ROM (IC203)
SDRAM (IC202)
DVDMAIN Assy
Flash ROM (IC203)
DVDMAIN Assy
1 5 0 5 8 2 9 9 4
DVD IC (IC201)
UCOM (IC5501)
DVDMAIN Assy
UCOM (IC5501)
DVDMAIN Assy
DVD IC (IC201)
UCOM (IC5501)
DVDMAIN Assy
EEPROM (IC204)
DVDMAIN Assy
Video circuit after DVD IC
(IC201)
m
co
4
9 9
2 8 9 9