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1
2
AV
MODE
Q1
Q2
BC847B
BC847B
R1
R2
10K SM
10K SM
D
SW6
SW12
TACTSW A1505
TACTSW A1505
R29
10K SM
R30
10K SM
R33
R34
330R SM
150R SM
0V_D
LED11
LED RED/GRN 3MM
0V_D
LEFTAUDIO
10U EL SM
C11
R41
100K SM
R42
100K SM
C
+5V
C17
100N SM
+5V
0V_D
1
Vcc
PB0
2
PB0
R55
SEL7
3
PB1
10K SM
SEL6
4
PB2
SEL5
5
Q_51
PB3
SEL4
6
PB4
D3
SEL3
7
PB5
BAS16W SM
SEL2
8
PB6
SEL1
9
PB7
Q_52
VPROG
10
Vpp/RESO
11
Vss
R64
B
DISPDAT
Q_46
12
TxD0/P9.0
TRANSMIT
13
100R SM
TxD1/P9.1
14
RxD0/P9.2
RECEIVE
15
RxD1/P9.3
R65
DISPCLK
Q_45
16
IRQ4/SCK0/P9.4
17
100R SM
IRQ5/SCK1/P9.5
DISPBLK
R66
18
Q_43
D0/P4.0
DISPLAT
R67
19
100R SM
D1/P4.1
TONEID
20
100R SM
Q_44
D2/P4.2
SDATA
21
D3/P4.3
22
Vss
SLOAD
23
D4/P4.4
C31
C32
SCLK
24
D5/P4.5
10P SM
10P SM
25
D6/P4.6
Q_42
0V_D
0V_D
+5V
R51
100R SM
Q_41
Q_40
+5V
C5
100N SM
R32
10K SM
0V_D
IC5
24C02 SM
4
8
VSS
VDD
C8
100N SM
A
0V_D
1
2
3
RECORD
TONE
DVD
DOWN
UP
ENTER
POWER
R3
R4
R5
R6
R7
R8
R68
10K SM
10K SM
10K SM
10K SM
10K SM
10K SM
10K SM
SW11
SW8
SW7
SW13
SW14
SW15
SW17
TACTSW A1505
TACTSW A1505
TACTSW A1505
TACTSW A1505
TACTSW A1505
TACTSW A1505
TACTSW A1505
IC7B
5
7
6
LM393A SM
0V_D
+5V
IC6B
R50
TRANSMIT
SAMHOLD
5
10K SM
2V7
Q_34
R43
+5V
6
100K SM
Q_35
LM393A SM
+5V
R37
IC6A
IC7A
10K SM
LM393A SM
3
R49
RECEIVE
1
1
10K SM
2
LM393A SM
Q_53
R44
100K SM
Q_47
+5V
C9
0V_D
100N SM
Programming adaptor
SK4
PR_VCC
PR_GND
2
1
RECEIVE
PR_RXD
PR_TXD
4
3
Q_55
6
5
VPROG
PR_VPP
PR_MD
8
7
PB0
PR_PMODE
PR_RESET
10
9
12
11
14
13
+5V
HEADER 7X2HORIZ
+ C14
0V_D
C3
10U EL SM
100N SM
0V_D
IC1
+5V
D2
+5V
BAS16W SM
R26
Q_56
75
MD2
74
MD1
10K SM
73
MD0
72
STANDBY
P6.6/LWR
71
SP1ON
P6.5/HWR
70
SP2ON
P6.4/RD
69
THERMPROT
P6.3/AS
68
Vcc
67
XTAL
66
EXTAL
65
Vss
64
NM1
H8/3048F
63
RESPIN
RES
62
STBY
61
C4
CLKOUT
60
100N SM
SAMTX2
P6.2/BACK
59
SAMRX2
P6.1/BREQ
58
BUT17
P6.0/WAIT
57
Vss
Q_39
56
Q_86
BUT9
P5.3/A19
55
Q_87
BUT8
P5.2/A18
54
BUT7
Q_88
P5.1/A17
53
BUT6
Q_89
P5.0/A16
52
Q_90
BUT2
P2.7/A15
51
Q_91
IND3
P2.6/A14
0V_D
0V_D
H8/3048F
Q_98
0V_D
C50A 100PX4 SM
C50B 100PX4 SM
C50C 100PX4 SM
C50D 100PX4 SM
C51A 100PX4 SM
C51B 100PX4 SM
C51C 100PX4 SM
C51D 100PX4 SM
C52A 100PX4 SM
C52B 100PX4 SM
C52C 100PX4 SM
C52D 100PX4 SM
C53A 100PX4 SM
C53B 100PX4 SM
C53C 100PX4 SM
C53D 100PX4 SM
C54A 100PX4 SM
C54B 100PX4 SM
C54C 100PX4 SM
C54D 100PX4 SM
C55A 100PX4 SM
C55B 100PX4 SM
C55C 100PX4 SM
C55D 100PX4 SM
CHASSIS 1
3
4
5
PHONO/
SELECT
CD
TUNER
VCR
AUX
TAPE
SP2
R9
R10
R11
R12
R13
R14
R15
10K SM
10K SM
10K SM
10K SM
10K SM
10K SM
10K SM
SW16
SW1
SW4
SW2
SW5
SW3
SW10
TACTSW A1505
TACTSW A1505
TACTSW A1505
TACTSW A1505
TACTSW A1505
TACTSW A1505
TACTSW A1505
+5V
2V7
0V5
Q_21
Q_22
R35
R36
R39
+5V
+5V
10K SM
10K SM
2K2 SM
R40
R47
4K7 SM
IC8A
0V_D
4K7 SM
Q_59
SAMTX2
3
7
SAMDATA
2V7
1
+5V
2
SAMBUSY
R38
LM393A SM
R46
1K2 SM
R45
1K2 SM
IC8B
0V5
10K SM
0V5
2
6
Q_115
SAMRX2
7
3
0V_D
5
0V_D
Q_54
LM393A SM
SP
2
IR RX
SUPPORT PAD
IR RX SUPPORT PAD
RX1
SBX1610-52/PIC-26043TM2
SP103
PLACE ONE ON TOP OF
IR RX
THE OTHER UNDER RX1
SUPPORT PAD
0V_D
TRANSMIT
IR RX SUPPORT PAD
RESPIN
SAMHOLD
+5V
SK2
1
Q_19
SAMDATA
2
SAMBUSY
3
4
Q_20
5
AMPCT5
0V_D
C1
Q_37
18P SM
X1
16MHZ SM
0V_D
+5V
C2
Q_38
C12
18P SM
+ C33
+ C34
220U EL
220U EL
100N SM
+5V
IC2
0V_D
3
Vcc
(FIT CLOSE TO SK1)
2
Res
C7
4
Gnd
1
Gnd
DS1233 SM
100N SM
0V_D
To preamp board
Q5
BD179 NPN TO-126
SK3
+SUP
22
Q_1
SEL1
21
Q_2
SEL2
20
Q_3
SEL3
R54
19
Q_4
SEL4
3K3 MF
18
Q_5
SEL5
17
Q_6
SEL6
16
Q_7
SEL7
D1
15
Q_8
SEL8
Q_75
ZENER 400MW 33V
14
Q_9
SEL9
13
12
Q_10
LEFTAUDIO
+
11
C26
10
Q_11
MUTE
10U EL SM
9
Q_12
TONE
8
Q_117
7
Q_14
TONEID
6
Q_118
5
Q_15
SDATA
4
Q_119
3
Q_16
SLOAD
2
Q_120
DRAWING TITLE
1
Q_17
SCLK
A32 FMJ AMP DISPLAY PCB
FFC 22W 1MM HOR
23425
0V_D
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
0V_D
Waterbeach
Cambridge CB5 9PB
4
5
6
7
SP7
SP8
SP6
SP3
SP10
SP9
SP1
SPACER F195
SPACER F195
SPACER F195
SPACER F195
SPACER F195
SPACER F195
SPACER F195
SP1
R16
R17
R18
R19
R20
R21
R22
10K SM
330R SM
330R SM
330R SM
330R SM
330R SM
330R SM
SW9
TACTSW A1505
Q_65
Q_66
Q_67
Q_68
Q_69
Q_70
LED7
LED8
LED6
LED3
LED10
LED9
LED GREEN
LED GREEN
LED GREEN
LED GREEN
LED GREEN
LED GREEN
LED GREEN
SP101
+5V
DOUBLE SIDED
STICKY PAD
R74
10 X 15MM
10K SM
STICKY PAD DS 10X15MM
SP102
R73
DOUBLE SIDED
IRIN
10K SM
IRIN
STICKY PAD
10 X 15MM
Q4
STICKY PAD DS 10X15MM
BC847B
DC1
DISPLAY CRADLE
Q3
E916PM
R76
IROUT
BC847B
DISPLAY CRADLE E916PM
10K SM
DC2
+5V
R75
DISPLAY CRADLE
10K SM
E916PM
DISPLAY CRADLE E916PM
O/P
0V_D
O/P
C6
+5V
100N SM
+5V
3
R52
F1CLOCK
2
R56
Q_79
100R SM
10K SM
0V_D
Q_50
SW18
5
ALPS_ENCODER
R53
1
PHASEA
F2CLOCK
6
Q_58
A
2
PHASEB
Q_78
100R SM
B
Q_57
R57
10K SM
3
C
0V_D
C13
100N SM
0V_D
+5V
To power amp / PSU
SK1
+SUP
C60D 100PX4 SM
14
C60C 100PX4 SM
13
Q_121
C60B 100PX4 SM
12
C60A 100PX4 SM
11
STANDBY
Q_122
C61D 100PX4 SM
10
SP1ON
Q_123
C61C 100PX4 SM
9
SP2ON
Q_124
C61B 100PX4 SM
8
THERMPROT
Q_125
C61A 100PX4 SM
7
VIPROT
Q_126
C62D 100PX4 SM
6
DCPROT
Q_127
C62C 100PX4 SM
5
ACPRESENT
Q_128
C62B 100PX4 SM
4
C62A 100PX4 SM
3
IRIN
Q_129
C63D 100PX4 SM
2
C63C 100PX4 SM
1
C63B 100PX4 SM
FFC 14W 2.54MM HOR
0V_D
C63A 100PX4 SM
CHASSIS 2
VFD_VDD2
Q_23
+5V
+
C28
IC6C
IC7C
C16
IC8C
10U EL SM
C10
C15
100N SM
LM393A SM
LM393A SM
LM393A SM
100N SM
100N SM
0V_D
0V_D
WAF
26/9/01
STICKY PADS RENUMBERED
Circuit Diagram
JBR
10/9/01
PRE PRODUCTION RELEASE
Notes:
WAF
9/08/01
UPDATED PROTOTYPE
CL
25/04/01
INITIAL PROTOTYPE
ECO No.
INITIALS
DATE
Filename
Date Printed
Drawn by:
CL
J:\Released_Documents\Native_format_files\Protel_DDB\L928_B.3.Ddb - Documents\L928CT_2_B.3.SCH
10-Oct-2001
6
7
8
SP4
SP2
SP5
SPACER F195
SPACER F195
SPACER F195
+5V
R25
R24
R23
R31
330R SM
330R SM
330R SM
330R SM
D
Q_71
Q_72
Q_73
Q_74
LED1
LED4
LED2
LED5
LED GREEN
LED GREEN
LED GREEN
DISP1
F1 to F2 = 4Vac 150mA
B1013
VDD2 = 40Vdc 20mA
Graphics Display
+5V
VFD_VDD2
0V_D
Q_82
Q_49
IC11A
AD8532 SM
C
R58
Q_48
1
0R0 SM
Q_80
R59
7
0R0 SM
Q_81
IC11B
AD8532 SM
B
Q_64
+ C29
IC11C
100U EL SM
C25
AD8532 SM
100N SM
Q_116
A
B.3
B.2
B.0
A.0
DESCRIPTION OF CHANGE
ISSUE
Sheet
2
of
2
L928CT2
DRAWING NO.
8
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