Dvd Trouble Shooting - Pioneer XV-DV370 Service Manual

5

5.2 DVD TROUBLE SHOOTING

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No. Symptoms
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.)
TE
L 13942296513
3 An opening screen is not
displayed on the monitor
(The FL display lights. The
mechanism works.)
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(DVD MAIN Assy) disconnected or damaged ?
Check that the following voltage is output :
Q1202-source on the DVD MAIN Assy: 3.3V
Are the signals output from IC201-pin 97 (MDATA) and pin 98 (SCLK)
on the DVD MAIN Assy ? (in the range of 0-3V)
Are the signals input into IC5501-pin 50 (MDATA) and pin 51 (SCLK) on
the DVD MAIN Assy ? (in the range of 0-3V)
Check that the following voltage are output :
Q1302-collector on the DVD MAIN Assy: 5V
Is a resonator (X201: 27MHz) on the DVD MAIN Assy oscillating ?
• Is a signal input into IC203-pin26 (PCE#) on the DVD MAIN 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 DVD MAIN Assy ?
(Is a signal fluctuating ?)
-> Communication with SDRAM
Is a signal output from IC203-pin 28 (PRD#) on the DVD MAIN 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 DVD MAIN
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 (DVD MAIN Assy IC201)
and video-out terminal (see the block diagram)
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Diagnosis Contents
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XV-DV370
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Possible Defective Points
Connector / cable
POWER SUPPLY Unit
DVD MAIN Assy
DVD IC (IC201)
DVD MAIN Assy
UCOM (IC5501)
DVD MAIN Assy
5V Regulator IC (IC751)
DVD MAIN Assy
Crystal resonator (X201)
DVD IC (IC201)
DVD MAIN Assy
DVD IC (IC201)
Flash ROM (IC203)
SDRAM (IC202)
DVD MAIN Assy
Flash ROM (IC203)
0 5 8 2 9 9 4 2 8
DVD MAIN Assy
DVD IC (IC201)
UCOM (IC5501)
DVD MAIN Assy
UCOM (IC5501)
DVD MAIN Assy
DVD IC (IC201)
UCOM (IC5501)
DVD MAIN Assy
EEPROM (IC204)
DVD MAIN Assy
Video circuitafter DVD IC
(IC201)
m
9 9
A
B
C
9 9
D
E
F
19
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