Printed Wiring Board - Key Board - Sony MEX-BT2500 Service Manual

MEX-BT2500
5-5. PRINTED WIRING BOARD – KEY Board –
1 2
KEY BOARD (COMPONENT SIDE)
A
LED943
A K
LED951 – 953
LED943, S902
PUSH SELECT/
OFF S902
(VOL)
R902
A
LSW901
A1 A2
LSW901
BLUETOOTH
K1 K2
EQ S1 S2
B
LSW904
A1
LSW904 A2
SEEK– K1
K2
. m
S2
K
S1
A
R944
A1 A2
LSW902
K1 K2
S1 S2
C
BTM
(US, CND, E)
PTY
(AEP, UK)
D
KEY BOARD
(CONDUCTOR SIDE)
RE901
ROTARY ENCODER
3
E
2
F
RE901
PUSH SELECT/
(VOLUME)
MEX-BT2500
• See page 27 for Circuit Boards Location.
3 4
S901 – 904
LED944, S903
SOURCE
K LED951
A
R961
K
S903
LSW903
A1 A2
LSW903
SEEK+
K1 K2
M >
S1 S2
K
LED945, S904
A
A
MODE
37
K
S904
A1 LSW905 A2 A1
K1 K2 K1
S1 S2 S1
DIM
DSPL
4 5
1
Note: Refer to the Servicing Notes "NOTE FOR REPLACEMENT
OF THE AUX JACK (J901)" (page 5), if replacing the Ref. No.
J901.
: Uses unleaded solder.
5 6 7
LSW901 – 912
S1 S2
LED941 – 945,
K1 K2 LED951 – 953
A K
A1 A2
LED942
(DISC SLOT ILLUMINATION)
K A
LCD901
LIQUID CRYSTAL DISPLAY
LSW906 A2 A1 LSW907 A2 A1 LSW908 A2 A1 LSW909
K2 K1 K2 K1 K2 K1
S2 S1 S2 S1 S2 S1
ALBM – ALBM + REP SHUF
1 2 3
32 32
8 9
1
A2 A1 LSW910 A2 A1 LSW911 A2 A1 LSW912
K2 K1 K2 K1 K2 K1
S2 S1 S2 S1 S2 S1
PAUSE
5
SCRL
4 6
AF/TA
(Page 28)
MAIN BOARD
A
CN701
• Semiconductor Location
Ref. No. Location Ref. No. Location
D903 E-9 D991 E-7
D981 F-8 D992 E-7
D982 F-8 D993 E-7
D987 E-9 D994 E-10
D988 E-9
D989 E-9 IC901 E-6
D990 E-9 IC971 C-10
10 11
LED941
A K
LED941, S901
Z
S901
(LCD BACK LIGHT)
C971
1 2
IC971
A2
R916
K2 21
4 3
S2
(21)
1-871-017-
(US, CND, E)
(AEP, UK)
AUX
21
(21)
1-871-017-
Ref. No. Location Ref. No. Location
LED931 B-10 LED952 B-3
LED941 A-11 LED953 B-2
LED942 B-6
LED943 A-1 Q931 E-5
LED944 B-4 Q932 E-5
LED945 C-4
LED951 B-3