Dvd Trouble Shooting - Pioneer XV-LX61DV 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
(4IN1 MOD Assy : IC1204)
Flash ROM
(4IN1 MOD Assy : IC1203)
DVD IC
(4IN1 MOD Assy : IC1201)
64M SDRAM
(4IN1 MOD Assy : IC1202)
B
DVD SUB UCOM
(SYSMAIN Assy : IC4001)
No. Symptoms
1 The power is not turned on. Are wires of output connector (POWER SUPPLY Unit) and CN1968
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.
No power.
Diagnosis Contents
(4IN1 MOD Assy) disconnected or damaged ?
Check that the following voltage is output :
CN1968-pin 5 or pin 6 (4IN1 MOD Assy): 3.3 V
Are the signals output from IC1201-pin 97 (MDATA) and pin 98 (SCLK)
on the 4IN1 MOD Assy ? (in the range of 0 - 3 V)
Are the signals input into IC1001-pin 85 (MDATA) and pin 86 (SCLK) on
the SYSMAIN Assy ? (in the range of 0 - 3V)
Check that the following voltage are output :
Q1121-collector on the SYSMAIN Assy: 5V
Is a resonator (X1201: 27 MHz) on the 4IN1 MOD Assy oscillating ?
• Is a signal input into IC1203-pin26 (PCE#) on the 4IN1 MOD 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 IC1202-pin 16 (DWE#), pin 19 (DCS#)
and pin 38 (SDCLK) on the 4IN1 MOD Assy ?
(Is a signal fluctuating ?)
-> Communication with SDRAM
Is a signal output from IC1203-pin 28 (PRD#) on the 4IN1 MOD Assy?
(Is a signal fluctuating for several hundred ms after the power is turned
on ?)
Is a signal input into IC1001-pin 11 (DVD ACK) on the SYSMAIN
Assy ? (Is a signal fluctuating ?)
-> Communication with System Control IC
Is a signal output from IC1001-pin 13 (XREADY) on the SYSMAIN Assy
? (Is a signal fluctuating in the range of 0-5V ?)
Are the signals output from IC1001-pin 84 (SDATA) on the SYSMAIN
Assy ? (in the range of 0-5V)
Are the signals of IC1204-pin 5 (SDA) and pin 6 (SCL) on the 4IN1
x ao
MOD Assy fluctuating for one or two seconds after the power is turned?
y
. i
Check the video signal path between DVD IC (4IN1 MOD Assy IC201)
and video-out terminal (see the block diagram)
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Symptoms
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XV-LX61DV
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2 9 9 4 2 8
Possible Defective Points
Connector / cable
POWER SUPPLY Unit
4IN1 MOD Assy
DVD IC (IC1201)
SYSMAIN Assy
UCOM (IC1001)
POWER SUPPLY Unit /
1 5 0 5 8 2 9 9 4
SYSMAIN Assy Q1121
4IN1 MOD Assy
Crystal resonator (X1201)
DVD IC (IC1201)
4IN1 MOD Assy
DVD IC (IC1201)
Flash ROM (IC1203)
SDRAM (IC1202)
4IN1 MOD Assy
Flash ROM (IC1203)
4IN1 MOD Assy
DVD IC (IC1201)
SYSMAIN Assy
UCOM (IC1001)
SYSMAIN Assy
UCOM (IC1001)
4IN1 MOD Assy
DVD IC (IC1201)
SYSMAIN Assy
UCOM (IC1001)
m
4IN1 MOD Assy
co
EEPROM (IC1204)
4IN1 MOD Assy
Video circuit after DVD IC
(IC1201)
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9 9
2 8 9 9