XV-DV1000
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7.1.8 TROUBLE SHOOTING
START
Is OEL turn on ?
Is tray open ?
Is the indication
of OEL normal ?
Power ON
Yes
Yes
Yes
No
No
No
Turn on the power again
after 2 - 3 minutes.
OEL indication is dark or flickers.
Indicates the error message
Refer to the section "7.1.6 ERROR DISPLAY".
• Tact-switch (STBY Assy S1901) is damaged. (incase of only a key NG)
Is CONTROL Assy IC5501-pin 18 (KEY1) 1.2V when POWER keyis pressed ?
• Remote control unit or IR, SEL IR signal line are damaged.
(incase of only a key of remote control unit NG)
• Microcomputer is damaged on DISPLAY Unit.
• Check the following connections :
Display Unit
↔
Product
DVDM Assy
↔
VIDEO Assy
• Check the voltage regulator of DVDM Assy IC791-pin 1 (+1.8V)
• Check each voltage
• Check the address bus and data bus of signal
interface between FR CPU (IC601)
↔
AV1 (IC751),
Eby-Chip (IC701) and Servo DSP (IC201).
Clock generator IC481 or crystal resonator X481 is damaged.
Check waveform of each pin whether IC481 does oscillation.
• Check the following connections :
DVDM Assy CN103
↔
LOAB Assy CN601
DVDM Assy CN105-pin 12 (INSIDE SW signal)
• Check the loading drive signal : IC351-pin 14, 15, 16
• Check the +6V and +12V power supply voltages
Do the video and
sound come on?
or beeing damaged?
(noisy)
Yes
No
Refer to the section "7.1.6 ERROR DISPLAY".
Indicate the error message.
Carriage does
not move.
(Stepping positioning)
Yes
• Laser diode
does not light.
• Focus does
not in.
No
No
OK
• Check the following connections and FTS drive IC :
DVDM Assy CN104 (4P flexible cable)
Check the Stepping motor signals, IC351-pin 31, 32, 34, 35 and IC601-pin 47, 48.
• Check the +6V and +12V power supply voltages
• Check the following connections and spindle drive IC :
DVDM Assy CN105 (12P flexible cable)
Check the Spindle motor signals and IC251-each pins.
• Check the +6V and +12V power supply voltages
• Check the connection between VIDEO Assy and DVDM Assy.
• Check voltage regulator of VIDEO Assy IC8801-pin 1 (+5V) for Video circuit,
• Check the interface of 16M SDRAM (IC741) for Eby-chip (IC701) and 64M SDRAM (IC781) for
AV1 (IC751).
• Check digital data of video and audio signals (audio signals: 3 line data, video signals: 8bit data)
shown to each schematic diagram and an analog signal line.
In addition, check CLK.
audio system: 22/24MHz, video system: 27MHz
• Check the following connections (IC351, IC101, IC201) :
DVDM Assy CN101
↔
Pickup Assy (26P flexible cable)
IC351-pin 9, 10, IC101-pin 41 and IC201-pin 32, 47 for Focus Drive
• Check the +6V and +12V power supply voltages
• Check it whether the pickup is defectiveness.
Perform the section "7.1.2 SELF-DIAGNOSIS FUNCTION OF PICKUP DEFECTIVE" and check
the LD current value. C101 (for DVD LD) and C103 (for CD LD) of DVDM are missing.
• Regarding DVD LD (650nm) :
Check each signals of CN101-pin 1 (MPD), pin 2 (LD Drive), IC101-pin 15 and Q101
Regarding CD LD (780nm) :
Check each signals of CN101-pin 1 (MPD), pin 7 (LD Drive), IC101-pin 17 and Q102
MPD:
M
onitor
P
ower
D
iode (signal output)
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