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Check RF and Spindle
(Insert CD-ROM Disc).
Check the identification of
CD-R Disc(Insert Blank CD-R).
Check the input signal of ATFG
(pin 69 of IC101).
Check the identification of CD-RW
Disc (Insert Blank CD-R).
Spindle
Motor
HB
HU+ , HU-
HV+ , HV-
HW+ , HW-
Check the operation signal of Spindle
Optical
Pick-up
KRS-340B
STEP Motor
U
9
V
11
W
18
7
,
1
2
,
3
4
,
5
6
Check EQRF input signal
(pin 45 of IC101)
Check FG input
(pin 20 of IC101).
(pin 24 of IC501).
IC 401
MT1516
RF Amp
Wobble
A ~ D
General port use
E ~ H
101
DRV-MUTE2
CTL1
IC 501
BD7907FS
6Ch Servo
DRIVE
Check the signal of A~H (pin 39, 38,
37, 36, 30, 31, 32, 33, of IC401)
Check the control signal of Drive IC
•
(pin 22, 23, of IC501).
Check power/VC of DRIVE IC.
•
Check SCLK, SDATA, XLAT
(pin 122, 123, 124 of IC401).
EQRF
21
SCLK
122
SDATA
123
XLA T
124
ATFG
116
102
DRV-MUTE1
22
23
CTL2
24
SPIN
21
FG
1.4 V
27
VC
45
65
IC 101
63
62
MT1518
69
DSP
Decoder
Encoder
I / F
ATIP
Demodulator
25
DMO
Micro
Processor
20
FG
59
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