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Check the identification of CD-
ROM Disc (insert Disc).
Check the operation of Focus.
Check the operation of Tracking.
Check the Jump action.
1
2
3
4
45
46
47
48
IC 501
BD7907FS
6Ch Servo
DRIVE
SLI N2
In case of Focus Up/Down
• Check the drive signal of FCS-/+
(pin 1, 2 of CN201).
• Check drive input signal of Focus
(pin 53 of IC501 : FCIN).
• Check the input signal of FE
(pin 42 of IC101 : FEI).
• Check the input signal of SBAD
(pin 38 of IC101).
• Check the drive signal of TRK+/-
(pin 3, 4 of CN201).
• Check the signal of Tracking
(pin 52 of IC501 : TKIN).
• Check the signal of SLED
(pin 28, 29 of IC501 : SLIN1, 2).
Check the input signal of TE
Optical
Pick-up
A ~ D
KRS-340B
E ~ H
CN 201
DRV-MUTE2
22
CTL1
DRV-MUTE1
23
CTL2
1.4 V
27
VC
52
TKIN
53
FCIN
28
SLI N1
29
(pin 40 of IC101 : TEI).
IC 401
MT1516
RF Amp
General port use
101
102
TRSO
7
6
NJM
FOSO
3404
1
2
IC 505
• Check control signal of Drive IC
(pin 22, 23 of IC501: CTL1,2).
• Check power and VC of DRIVE IC.
Check signal of A~H (pin 39, 38, 37,
36, 30, 31, 32, 33 of IC401).
• Check the input signal of CSI (pin
41 of IC401).
• Check the input signal of RFZC (pin
60 of IC101 : HRFZC).
FEO
42
42 FEI
SBAD
49
38
SBAD
TEO
45
40
TEI
CSI
43
41
CSI
RFZC
126
60 HRFZC
SCLK
122
65
SDATA
123
63
XLA T
124
62
Micro Processor
23
TRO
22
FOO
26
FMO
27
FMO2
IC 101
MT1518
DSP
Decoder
Encoder
I / F
57
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