Pioneer CB-A802, Руководство по обслуживанию

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DVD-V8000
100
1 2 3 4
1 2 3 4
C
D
F
A
B
E
Do the video and
sound come on?
or beeing damaged?
(noisy)
Yes
No
Refer to the section "7.1.5 ERROR DISPLAY". Indicate the error message.
Carriage does
not move.
(Stepping positioning)
Yes
Yes
• Laser diode
does not light.
• Focus does
not in.
Yes
No
No
Spindle
does not turn.
No
OK
• Check the following connections and FTS drive IC (IC351) :
DVDM Assy CN114 (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 voltage
(If above voltage is not supplied, check the micro-fuse P202 and P301.)
• Check the following connections and Spindle drive IC (IC251) :
DVDM Assy CN115 (12P flexible cable)
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,
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
• 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.
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
PD: P ower D iode (signal output)
A