Does Not Read Disc; Disc Does Not Rotate.; Cd Check Process; Dvd Check Process - Denon DVD-3910 Service Manual

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3 7 6 3 1 5 1 5 0

1.3. Does not Read Disc

[No Play],[00 00] displayed etc.

(1) Disc does not Rotate.

Check the Emission of Pick-up.
GU-3618(MAIN UNIT)
Emission of P.U. laser O.K.?
See attached sheet laser current check.
O.K.
Check Spindle drive signal.
GU-3618(MAIN UNIT)
[DMO]:"H"level?
O.K.
END

(2) CD check process

Check the RF signal.
GU-3618(MAIN UNIT)
Check the voltage of Test-Point(TP)
T E
L 1 3 9 4 2 2 9 6 5 1 3
TP[RFAC]:about 1.0Vp-p
O.K.
Check Bus Line.
GU-3618(MAIN UNIT)
[IC507] [IC505](16MDRAM)
"L" "H" alternate?
O.K.
END

(3) DVD check process

Check VSTEM communication.
GU-3618(MAIN UNIT)
[VDT0-7_COR],[XHAC_COR],[XSHD_COR],
[DCK_COR],VEFG_COR]
"L" "H" alternate?
O.K.
Check Request signal.
GU-3618(MAIN UNIT)
Request from [B/E] and [F/E]
[HDRQ_COR]:"L"level?
w w w
O.K.
END
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(1) Check Soldering of P.U.
N.G short-circuit?
(2) Check the circumference soldering of TR501
and TR502.
(3) Check connector insertion.
[P.U.] - [GU-3618] FFC(CX241)
(4) Check the soldering [IC502](CXD1881AR)
and circumference soldering of [IC502].
(5) Check the soldering [IC503](FAN8042)
and circumference soldering of [IC503].
(1) Check soldering of [IC507]:111-113pin.
N.G (2) Check the circumference soldering of
[SPWM1],[SPWM2] and [FG] signal.
(3) Check the soldering [IC501](AN8471SA)
and circumference soldering of [IC501].
N.G (1) Check the circumference soldering of [IC502]
(2) Check the circumference soldering of [IC507]
Check Soldering.
N.G Address,Data Bus,Control Signal.
[BD0-15],[BA0-9],[XLCAS],[XUCAS],[XMOE],
[XRAS]
Check the circumference soldering of [IC505]
N.G Check Soldering.
[IC507]:36-49pin
R638-R650
N.G Check the circumference soldering of [IC401]
x a o u 1 6 3
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1.3.
[No Play],[00 00]
(1)
Pick-up
GU-3618(MAIN UNIT)
P.U. O.K.?
O.K.
GU-3618(MAIN UNIT)
[DMO]:"H"level?
O.K.
(2)
GU-3618(MAIN UNIT)
(TP)
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3 7 6 3 1 5 1
TP[RFAC]: 1.0Vp-p
O.K.
GU-3618(MAIN UNIT)
[IC507] [IC505](16MDRAM)
"L" "H"
O.K.
(3)
GU-3618(MAIN UNIT)
[VDT0-7_COR],[XHAC_COR],[XSHD_COR],
[DCK_COR],VEFG_COR]
"L" "H"
O.K.
GU-3618(MAIN UNIT)
[B/E] [F/E]
[HDRQ_COR]:"L"level?
O.K.
c o
.
27
2 4 9 8 2
(1) P.U.
N.G
(2) TR501,TR502
(3)
[P.U.] - [GU-3618] FFC(CX241)
(4) [IC502]
(5) [IC503]
(1) [IC507]:111-113pin
N.G (2) [SPWM1],[SPWM2],[FG]
(3) [IC501]
N.G (1) [IC502]
(2) [IC507]
5 0 8 9 2 4 9 8 2
N.G .
[BD0-15],[BA0-9],[XLCAS],[XUCAS],[XMOE],
[XRAS]
[IC505]
N.G
[IC507]:36-49pin
R638-R650
N.G [IC401]
m
DVD-3910
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