Pioneer CB-A802 Service Manual page 100

1
QQ
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A
A
Carriage does
not move.
(Stepping positioning)
Yes
B
• Laser diode
does not light.
• Focus does
not in.
Yes
C
Spindle
does not turn.
TE
L 13942296513
Yes
Do the video and
sound come on?
D
or beeing damaged?
(noisy)
Yes
OK
E
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• Check the following connections and FTS drive IC (IC351) :
DVDM Assy CN114 (4P flexible cable)
No
Check the Stepping motor signals, IC351-pin 31, 32, 34, 35 and IC601-pin 47, 48.
• Check the +6V and +12V power supply voltage
(If above voltage is not supplied, check the micro-fuse P202 and P301.)
• Check the following connection, IC351, IC101, IC201 :
DVDM Assy CN111 - Pickup Assy (24P flexible cable)
IC351-pin 9, 10, IC101-pin 41 and IC201-pin 32, 47 for Focus Drive
• Check the +6V and +12V power supply voltage
(If +6V voltage is not supplied, check the micro-fuse P101 and P102.)
• Check it whether the pickup is defectiveness.
No
Perform the section "7.1.3 SELF-DIAGNOSIS FUNCTION" and check the LD current
value.
C101 (for DVD LD) and C103 (for CD LD) of the DVDM Assy are missing.
• Regarding DVD LD (650 nm) :
Check each signals of CN111-pin 17 (PD), pin 18 (LD Drive), IC101-pin 17 and Q101
Regarding CD LD (780 nm) :
Check each signals of CN111-pin 17 (PD), pin 16 (LD Drive), IC101-pin 17 and Q102
• Check the following connections and Spindle drive IC (IC251) :
DVDM Assy CN115 (12P flexible cable)
No
Check the Spindle motor signals and IC251-each pins of the DVDM Assy.
• Check the +6V and +12V power supply voltage
(If above voltage is not supplied, check the micro-fuse P202 and P301.)
• Check the following connections :
DVDM Assy - VJKB Assy
DVDM Assy - AJKB Assy
• Check voltage regulator of VJKB Assy IC7601-pin 1 (+5V) for Video circuit,
No
AJKB Assy IC8601 (+5V) for Audio circuit.
• Check the following communications of the DVDM Assy :
16M SDRAM (IC741) – Eby-chip (IC701)
64M SDRAM (IC781) – AV1 (IC751).
• Check digital data of video and audio signals (audio signals: 3 line data, video signals:
8 bit data) shown to each schematic diagram and an analog signal line.
In addition, check CLK.
Audio system: 22/24 MHz, Video system: 27 MHz
Indicate the error message.
x ao
y
. i
DVD-V8000
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8
Q Q
3 6 7 1 3
Refer to the section "7.1.5 ERROR DISPLAY".
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3
4
2 9 9 4 2 8
PD: Power Diode (signal output)
1 5 0 5 8 2 9 9 4
m
co
4
9 9
2 8 9 9