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A14 CPU/MOTHERBOARD BLOCK DIAGRAM (2 OF 2)
A14 CPU/MOTHERBOARD BLOCK DIAGRAM (2 OF 2)
sk790b
ABUS
VDISP
LCD BRIGHTNESS DRIVER
(FLUORESCENT)
INTERNAL DATA BUS
+
TP601
TO: LCD
J19-1
J19-2
J19-3
+5V
+10 VREF
OPEN=
DISPLAY ENABLED
+5V
LCD CONTROLLER
DISPLAY
ENABLE
J21-4
+5V J21-5
SHIFT
CLOCK
J21-3
TO LCD DISPLAY
FLM
LP
P0
P1
P2
P3
P4
P5
P6
P7
J21-1
J21-2
J21-11
J21-10
J21-9
J21-8
J21-15
J21-14
J21-13
J21-12
LCD RAM INTERFACE
LCD RAM
256K X 16
RESET
LCD DATA BUS
MEM ADDR BUS
CPU DATA BUS
14.32 MHz
CLOCK
LCD DATA
BUFFER
LCD
CONTROLLER
RPG
DECODER
RPG A
J20-14
RPG B
J20-10
L RPG INT
TO RPG
FROM RPG
INTERNAL DATA BUS
J20-12
+5V
RPG DECODER
TO FRONT PANEL
KEYROW 0
KEYROW 1
KEYROW 2
KEYROW 3
KEYROW 4
INTERNAL DATA BUS
KEYROW 5
KEYROW 6
KEYROW 7
J20-17
J20-19
J20-21
J20-23
J20-25
J20-26
J20-24
J2-22
KEYBOARD DECODER
FROM FRONT PANEL
KEYCOL 0
KEYCOL 1
KEYCOL 2
KEYCOL 3
KEYCOL 4
KEYCOL 5
KEYCOL 6
KEYCOL 7
J20-1
J20-3
J20-5
J20-7
J20-9
J20-11
J20-13
J20-15
L KEY INT
KEYBOARD
COLUMN
DECODER
INTERNAL DATA BUS
KEYBOARD
ROW
LATCH
DIGITAL CARD CAGE CONNECTIONS DAUGHTER BOARD CONNECTIONS
POWER SUPPLY DIAGNOSTICS
POWER
SUPPLY
DIAGNOSTICS
+32V
+15V
+12V
-15V
+5.2VD
DS503-A
LOW=+32V OK
LOW=+15V OK
LOW=+12V OK
LOW=-15V OK
+5.2VD
DS503-E DS503-B DS503-DDS503-C
JUMPER ACROSS
PINS TO RESET
J29-2
J29-1
SENSE
LOW RESET
POWER RESET
POWER
RESET
+5.2VD
+5.2VD
L PRESET
L HALT
L STANDBY
FAN POWER SUPPLY
+12V
+12V
FAN+
FAN+
J16-1
J16-2
J17-1
J17-2
NONVOLATILE MEMORY POWER
V BAT
SELECT
+5.2VD
+5.1V
+3V
BT1
+15V STANDBY
VBAT
SERIAL I/O SIGNALS
POWER SUPPLIES
MNEMONIC J5
18
21
24
20
23
26
70
73
76
REF DATA
REF CLK
REF ENABLE
SYNTH DATA
SYNTH CLK
SYNTH ENABLE
OUTPUT DATA
OUTPUT CLK
OUTPUT ENABLE
MNEMONIC J5
83
32,82
33
34,84
30,31
80,81
35,85
37,87
36,86
4,10
16,22
28,51
57,63
69,75
43,47
49,96
+32V
+15V
+15V STBY
+9V
+5.2V
-5.2V
-6V
-15V
DCOM
ACOM
MNEMONIC J5
40
97
99
98,100
93
92
91
17
29
48
46
42
79
15
41
55
60
56
11
5
61
62
6
12
7
13
14
59
8
64
58
50
44
45,94
95
54
9
3
53
2
+PTAT
10 MHz IN
10 MHz OUT
10 MHz RTN
ABUS
ABUS RTN
ALC GND
L ALC HOLD
L ALT PWR SEL
AUD 1 (NOT USED)
AUD 2 (NOT USED)
BURST ENVELOPE
BURST PULSE
COUNTER
FADE ENVELOPE
FM D0
FM D1
FM D2
FM D3
FM D4
FM D5
FM D6
FM D7
FM D8
FM D9
FM D10
FM D11
FM D12
FM D13
FM D14
FM D15
INT MOD
INT I MOD
INT I/Q MOD RTN
INT Q MOD
MOD STROB
PAREN SYNC
SWP READY
SWP STATUS
SWP RUN
CPU INTERFACE
MNEMONIC
J1 J2 J3 J4
24
74 74 74 74
25 25 25 25
26 26 26 26
76 76 76 76
27 27 27 27
77 77 77 77
78 78 78 78
29 29 29 29
79 79 79 79
36 36 36 36
24 24 24IAB0
IAB1
IAB2
IAB3
IAB4
IAB5
IAB6
IAB7
IAB8
IAB9
IAB10
19 19 19 19
20 20 20 20
70 70 70 70
21 21 21 21
71 71 71 71
72 72 72 72
23 23 23 23
73 73 73 73
EXT D0
EXT D1
EXT D2
EXT D3
EXT D4
EXT D5
EXT D6
EXT D7
32
83
82
33
33
33
33
EXT RESET
EXT RD L WR
EXT L STROBE
EXT SELECT 1
EXT SELECT 2
EXT SELECT 3
EXT SELECT 4
INT ADDR BUS
INT DATA BUS
CONTROL BUS
POWER SUPPLIES
CPU INTERFACE
MNEMONIC J1 J2 J3 J4
9 9 9 9
14,64 14,64 14,64 14,64
15,65 15,65 15,65 15,65
16,17 16,17 16,17 16,17
66,67 66,67 66,67 66,67
12,62 12,62 12,62 12,62
13,63 13,63 13,63 13,63
22,28 22,28 22,28 22,28
34,40 34,40 34,40 34,40
46,69 46,69 46,69 46,69
75,81 75,81 75,81 75,81
87,93 87,93 87,93 87,93
99 99 99 99
1,7 1,7 1,7 1,7
54,56 54,56 54,56 54,56
+32V
+15V
+12V
+5.2V
-5.2V
-15V
DCOM
ACOM
35
35
35
35
DIG BUS INT 1
DIG BUS INT 2
DIG BUS INT 3
DIG BUS INT 4
MNEMONIC
J1 J2 J3 J4
59 59 59 59
84 84 84 84
4 4 4 4
5 5 5 5
8 8 8 8
31 31 31 31
6 6 6 6
55 55 55 55
57 57 57 57
30 30 30 30
86 86 86 86
80 80 80 80
18 18 18 18
85 85 85 85
58 58 58 58
47 47 47 47
91 91 91 91
95 95 95 95
90 90 90 90
96 96 96 96
41 41 41 41
89 89 89 89
45 45 45 45
39 39 39 39
94 94 94 94
88 88 88 88
37 37 37 37
92 92 92 92
43 43 43 43
38 38 38 38
44 44 44 44
2 2 2 2
3,52 3,52 3,52 3,52
53 53 53 53
97 97 97 97
42 42 42 42
48 48 48 48
98 98 98 98
49 49 49 49
+PTAT
10 MHz DIG
ABUS
ABUS RTN
ALC GND
L ALC HOLD
AUD 1 (NOT USED)
AUD 2 (NOT USED)
BURST ENVELOPE
BURST PULSE
COUNTER
L DCC ALT PWR SEL
DCC TRIG OUT
DCC TRIG INT
FADE ENVELOPE
FM D0
FM D1
FM D2
FM D3
FM D4
FM D5
FM D6
FM D7
FM D8
FM D9
FM D10
FM D11
FM D12
FM D13
FM D14
FM D15
INT I MOD
INT I/Q MOD RTN
INT Q MOD
MOD STROB
PAREN SYNC
SWP READY
SWP STATUS
SWP RUN
DAC
LCD DRIVER VOLTAGE
(CONTRAST)
INTERNAL DATA BUS
TO: LCD
ABUS
VLCD
TP602
J21-7
VARIABLE
POWER
SUPPLY
+10 VREF
CLOSED=
DISPLAY ENABLED
DAC
SWITCHING POWER SUPPLIES
ABUS
ABUS
NEGATIVE
SWITCHING
SUPPLIES
+5.2VD
-5.2V
M5V
M6V
DS503-H
TP509
TP508
-6V
DS503-G
TP504
SWITCHING
SUPPLY
+12V
+32V
TP502
TP502
TP506
TP502
SUPPLY
FILTERING
+15V STANDBY
+15V
-15V
+12V
+5.2V
+5.2VD
+5.2V
J6-17
J6-20
J6-18
J6-19
J6-2,3,
12,13
+15V STBY
+15V
DS502
DS502
-15V
+12V
FROM POWER SUPPLY
POWER SUPPLY INPUTS
POWER SUPPLY REGULATORS
TP510
+12.5V
REG
+15V
+12.5V
DS504
TP501
+10V
REG
+15V
+10VREF
P10V_REF
TP507
+9V
REG
+10VREF
+9V
P9V
DS504
ABUS
ABUS
TP511
-12.5V
REG
-15V
+12.5V
DS505
L PWRON
J6-1
TO PWR SUPPLY
TO: FRONT
PANEL
POWER
SWITCH
LATCH
ON/OFF SW
J20-20
FROM FRONT PANEL
PWR GREEN
J20-2
J20-4
STBY YELLOW
+15V STBY
POWER ON
POLARITY
CONTROL JUMPERS
P104, 5, 6