XV-DV360
71
5
6
7
8
5
6
7
8
C
D
F
A
B
E
7.1.8 DVD TROUBLE SHOOTING
No.
Symptoms
Diagnosis Contents
Possible Defective Points
1
The power is not turned on. Are wires of output connector (POWER SUPPLY Unit) and CN1001
(DVDMAIN Assy) disconnected or damaged ?
Connector / cable
Check that the following voltage is output :
Q1202-source on the DVDMAIN Assy: 3.3V
POWER SUPPLY Unit
2
An opening screen is not
displayed on the monitor
(The FL display lights. The
mechanism does not work.)
Are the signals output from IC201-pin 97 (MDATA) and pin 98 (SCLK)
on the DVDMAIN Assy ? (in the range of 0-3V)
DVDMAIN Assy
DVD IC (IC201)
Are the signals input into IC5501-pin 50 (MDATA) and pin 51 (SCLK)
on the DVDMAIN Assy ? (in the range of 0-3V)
DVDMAIN Assy
UCOM (IC5501)
Check that the following voltage are output :
Q1302-collector on the DVDMAIN Assy: 5V
DVDMAIN Assy
5V Regulator IC (IC751)
Is a resonator (X201: 27MHz) on the DVDMAIN Assy oscillating ?
DVDMAIN Assy
Crystal resonator (X201)
DVD IC (IC201)
• 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
DVDMAIN Assy
DVD IC (IC201)
Flash ROM (IC203)
SDRAM (IC202)
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 ?)
DVDMAIN Assy
Flash ROM (IC203)
Is a signal input into IC5501-pin 67 (DVD ACK) on the DVDMAIN
Assy ? (Is a signal fluctuating ?)
→
Communication with FL Control IC
DVDMAIN Assy
DVD IC (IC201)
UCOM (IC5501)
Is a signal output from IC5501-pin 78 (XREADY) on the DVD MAIN
Assy ? (Is a signal fluctuating in the range of 0-5V ?)
DVDMAIN Assy
UCOM (IC5501)
Are the signals output from IC5501-pin 49 (SDATA) on the DVD MAIN
Assy ? (in the range of 0-5V)
DVDMAIN Assy
DVD IC (IC201)
UCOM (IC5501)
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?
DVDMAIN Assy
EEPROM (IC204)
3
An opening screen is not
displayed on the monitor
(The FL display lights. The
mechanism works.)
Check the video signal path between DVD IC (DVDMAIN Assy IC201)
and video-out terminal (see the block diagram)
DVDMAIN Assy
Video circuit after DVD IC
(IC201)
Summary of Contents for XV-DV360
Page 33: ...XV DV360 33 5 6 7 8 5 6 7 8 C D F A B E ...
Page 34: ...XV DV360 34 1 2 3 4 1 2 3 4 C D F A B E 3 11 POWER SUPPLY UNIT AC IN G ...
Page 38: ...XV DV360 38 1 2 3 4 1 2 3 4 C D F A B E ...
Page 49: ...XV DV360 49 5 6 7 8 5 6 7 8 C D F A B E CN3 SIDE B SIDE B POWER SUPPLY UNIT G G G CN1 CN2 ...
