Kenwood KDV-C810 Service Manual page 9

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3 7 63 1515 0 TIMING CHART OF MECHANISM OPERATION
Magazine pack in (for disc clamp about DISC1).
Detection of insertion of a magazine pack checks whether
an elevator position is in DISC1 (top position).Basic opera-
tion is the same as initial operation. Then, DISC1 is pulled
out from a magazine pack and a disc clamp is carried out.
1, Detection for MAGSW (SW5 for IC301, 64PIN) checks L.
2, An elevator position and initial operation is performed.
3, LOAD+ (IC301, 1PIN) is set to H, LOAD- (IC301, 2PIN) is
set to L, and DISC1 tray is pulled out from a magazine
pack.
4, LOADING MOTOR (VM3) is dr iven until CLAMP SW
(SW302) is set to L.
5, LOAD+ (IC301, 1PIN) and LOAD- (IC301, 2PIN) are set
to H, and loading operation is made to STOP.
TE
L 13942296513
ELV +
(IC301 3pin)
ELV -
(IC301 4pin)
LOAD +
(IC301 1pin)
LOAD -
(IC301 2pin)
LOAD OUT SW
(SW1 , IC301 28pin)
CLAMP SW
(SW302 , IC301 29pin)
UP SW
(SW2 , IC301 26pin)
DOWN SW
(SW3 , IC301 27pin)
DISCON
(IC301 33pin)
DISC.C
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(PHT1 , IC301 31pin)
MAG SW
(SW5, IC301 64pin)
.
L
H
L L
H
H
L L
H
H
x ao u163
y
L
H
i
INITIALIZE
2 9
8
Operation for disc clamp after playback
A disc detection sensor (D1) performs the focus search, after
that detection (DISCON H) for disc existence, and it goes
into playback mode.
1, Laser ON.
2, Focus search ON.
3, Focus error detection. (for disc surface and recorded layer)
When FE of a recorded side is detected twice, it distin-
guishes from the two layer disk of DVDs. CD and DVD is
distinguished by the time lag of FE detected from recorded
side and disc surface. When distinguished from CD, the
reflective level of a disc is detected and CD/CD-RW is dis-
tinguished.
4, Focus, Tracking servo ON.
5, Automatic adjustment of circuit.
Focus, Tracking offset, Focus, Tracking loop gain, Focus,
Tracking balance and RF gain.
Q Q
6, TOC information read-out.
3 6 7 1 3 1 5
7, Playback start.
L
L
L H
L H
co
.
DISC LOADING
KDV-C810/C820/C830
/C840/C860
9 4 2 8
0 5 8 2 9 9 4 2 8
Timing chart 2
L H
H L
L H
m
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