A
B
C
D
E
F
G
H
1
2
3
4
5
6
GX-505/GX-505VCD
■
PRINTED CIRCUIT BOARD (Foil side)
40
41
Point
q
(Pin59 of IC5)
V : 2V/div
H : 50 nsec/div
DC range
1 : 1 probe
Point
w
(Pin39 of IC8)
V : 2V/div
H : 0.1
µ
sec/div
DC range
1 : 1 probe
0V
0V
GX-505 CD P.C.B.
(Lead Type Device)
1
1
9
9
LMSW
LMSW
FMMTR (–)
FMMTR (+)
SPMTR (–)
SPMTR (+)
1/2VCC
E
A
C
LDGND
VR
FO (+)
TR (–)
VCC
D
B
F
LD
PD
TR (+)
FO (–)
12V
L
R
µ
5.6V
/CS
DSI
VSEL
A GND
–12V
A GND
D GND
DSO
/CDRES
/DCLK
A GND
TX
GND
+5
GND
GND
+B
FROM : CD MECHA.
FROM : INPUT (1)
FROM : MAIN (1)
FROM : INPUT (3)
FR
OM :
PICK UP HEAD
LED (CA)
POS SW
COLLE
OPEN SW
TUDN SW
LOADMTR (–)
TUUP SW
LED (AN)
ROTMTR (+)
ROTMTR (–)
CLOSE SW
GND
LOADMTR (+)
FR
OM :
CD MECHA.
1
18
36
19
1
30
80
51
31
50
100
81
1
20
60
41
21
40
80
61
1
18
36
19
14
85
14
85
1
1
7
14
8
7
14
8
GX-505 CD P.C.B.
(Surface Mount Device)
1
2
Ref. No.
Location
D1
F2
D2
E2
D4
E4
D5
E4
D6
E4
D7
E4
Ref. No.
Location
IC1
F2
IC2
B3
IC3
B3
IC4
E4
IC5
F3
IC7
B4
IC8
F3
IC9
F4
IC10
F4
IC13
G4
IC14
G4
●
Semiconductor Location
Ref. No.
Location
Q1
C1
Q2
B3
Q3
C1
Q4
B3
Q5
C4
Q6
B4
Q7
B4
Q8
B5
Q9
B4
Q10
B5
Q11
C5
Q12
C5
Q13
C4