Fluke ScopeMeter 123 Service Manual page 159

1 2 3
A
ADC-CHANNEL-A
R403
VDDAA
21K5
6
VDDA
B
ADC_A 5
[1,D10] VIN
REFADCT 8
VRT
C401
4p7 C402 9
VRM
100n
REFADCB 10
VRB
C403 7
IREF
100n
REF_BUS
VSSA2 VSSA1
[3,H8]
12 4
C
MIDADC_A
[1,E10]
STBY_A
[J,14]
PCB version < 8 PCB version < 8
PCB version 8
D APWM_BUS
PWM FILTERS
R431
POS_B POS_B_D
21K5
R432
OFFSET_B OFFSETBD
147K
R433
TRIGLEV1 TRGLEV1D
147K
R434
TRIGLEV2 TRGLEV2D
147K
R438
OFFSET_A OFFSETAD
147K
R439
POS_A POS_A_D
E
21K5
R441
SADCLEV SADCLEVD
3K16
R442
CHARCUR CHARCURD
1K47
C431 C433 C439 C442
100n 22n 4n7 22n
C432 C434 C438 C441
100n 22n 4n7 22n
F
R409 R436
CONTRAST CONTR_D
[C7]
26K1 26K1
+3V3D
[5,C16]
C436
1u
R405 R406 R408
1K 511E 10M
CONTRAST
V403 C404
V401
BSS84 BSN20 470p
G BSN20
V402
FRAME
[C7]
R410
68E1
R407
3K16
ADC-CHANNEL-B
-30VD
[5,C16]
C409
H 22n
R453
VDDAB
21K5
6
VDDA
ADC_B 5
[2,D10] VIN
REFADCT 8
VRT
I
C451
4p7 C452 9
VRM
100n
REFADCB 10
VRB
C453 7
IREF
100n
REF_BUS
VSSA2 VSSA1
[3,H8]
12
MIDADC_B
[2,E10]
STBY_B
J
[I,14]
PCB version < 8
PCB version 8
4 5 6 7
X453
VDDDA
[A10]
VDDO
[B11] [A10]
C416 C407 C408
100n 100n 100n
TO
LCD
MODULE
2 22
VDDD VDDO 14 ADC_A_D0
D0
15 ADC_A_D1
D1
16 ADC_A_D2
D2
17 ADC_A_D3
D3
D401 18 ADC_A_D4
D4
19 ADC_A_D5
D5
20 ADC_A_D6
D6
TDA 8792
21 ADC_A_D7
D7
24 SMPCLK
CLK
13
OEN
STBY NC VSSD VSSO
1 11 3 23
ADCA_BUS
DTRG_BUS
[3,H13]
TP437
SMPCLK
TP432
RAMPCLK
TP433
TRIGDT
TP438
TRIGQUAL
TP431
RSTRAMP
TP436
RANDOMIZE
HOLDOFF
HO_OUT
HOLDOFF
V461
R480
TP482 BAS16
10K
RAMPCLK
OPTION
SMPCLK
HO_IN
SMPCLK
R479
TP483 [I8] ALLTRIG
51K1
TRIGDT
TRIGQUAL
R478
HO_RNDM RSTRAMP
10K
C479
C480
22p
100n TRGLEV1D
TRGLEV2D
POS_B_D
DPWM_BUS
OFFSETBD
REFPWM1
C463 OFFSETAD
100n
POS_A_D
CONTR_D
REFPWM2
SADCLEVD
CHARCURD
C464
100n ADC_B_D7
REF_BUS
ADC_B_D6
[3,H8]
ADC_B_D5
ADC_B_D4
ADCB_BUS
ADC_B_D3
ADC_B_D2
ADC_B_D1
ADC_B_D0
VDDDB
[A10]
VDDO
[A10]
[B11]
C457 C458
C466 100n 100n
100n
[1,E3]
PROBE
2 22
[2,D3]
VDDD VDDO 14 ADC_B_D0
D0
15 ADC_B_D1
D1
16 ADC_B_D2
D2 SCLK, SDAT
17 ADC_B_D3
D3
D451
18 ADC_B_D4
D4
19 ADC_B_D5
[F8]
D5
20 ADC_B_D6
TDA 8792 D6
21 ADC_B_D7
D7
24 SMPCLK
CLK
13
OEN
STBY NC VSSD VSSO
4 1 11 3 23
KEYPAD FOIL
SEE CIRCUIT DIAGRAM 4
DIGITAL CIRCUIT KEYBOARD
123
Service Manual
8 9 10
[A5]
21 LCDONOFF LCDONOFF
MS422
20
MS421
19 DATACLK0 DATACLK0
MS420
18 +12VPROG
MS419
[5,B10]
[A4]
17 LCDAT3 LCDAT3
MS418
16 LCDAT2 LCDAT2
MS417
15 NC
MS416
14 LCDAT1
LCDAT1
MS415
13 LCDAT0 LCDAT0
MS414
12 NC
MS413
11 LINECLK LINECLK
MS412
10 FRAME FRAME
MS411
9 +VD
MS410
[B11]
8 M M +VD
MS409
7 LCDTEMP1 LCDTEMP1
MS408
6 +5VA +5VA
C471
[5,B16] [5,B16] MS406
5 +3V3D
+3V3D 100n
[5,B16] [5,B16] MS405
4 REFPWM1 REFPWM1
MS404
3 CONTRAST CONTRAST
MS403
2
MS402
1 -30VD -30VD
[5,C16] [5,C16] MS401
LCD_BUS ROM_ADDR
LCDTEMP1
[5,K2]
REF_BUS
[3,H8]
CONTRAST
[F1]
FRAME
[G1]
NC 1
NC
ADC_A_D7 2
ADCA7
ADC_A_D6 3
ADCA6
ADC_A_D5 4
ADCA5
ADC_A_D4 5
ADCA4
+VD 6
[B11] VDD
7
VSS
ADC_A_D3 8
ADCA3
ADC_A_D2 9
ADCA2
ADC_A_D1 10
ADCA1
ADC_A_D0 11
ADCA0
+VD 12
[B11] VCLAMPA
13
HOLDOFF
HO_OUT 14
DIGHO
HO_IN 15
HOSCHMIN
16
TROTCLK
+VD 17
[B11] VDD
18
VSS
19
SMPCLK
20
EXTTRIG
21
ALLTRIG
22
TRIGDT
23
TRIGQUAL
24
TROTRST
25
SHLDPWM
HO_RNDM 26
PWMA10N6
27
PWMA10N5
28
PWMA10N4
29
PWMA10N3
NC 30
PWMA10N2
31
PWMA12N1
32
VDDREFA
33
VSSREF
34
PWMA12N0
BACKBRIG 35
[5,K16] PWMA10N1
36
PWMA10N0
37
PWMA8N0
38
VDDREFB
39
PWMB10N0
40
PWMB8N0
+VD 41
[B11] VCLAMPB
42
ADCB7
43
ADCB6
44
ADCB5
45
ADCB4
+VD 46
[B11] VDD
47
VSS
48
ADCB3
49
ADCB2
50
ADCB1
51
ADCB0
NC 52
NC
SUPPRDET
[I12]
R471 R472
1M 1M
PROBE_A
PROBE_B
TP471
R473
SCLK
100E
TP472
SDAT
100E
R474
C488 C487
100p 100p
TP473 TP474
X452 TP476
4 B401 3 4 B402 3
32KHz 16MHz
2 1 2 1
C486 C485 C484
C483
27p 27p 22p 22p
9-10
11 12 13
R416
VDDO +3V3D
[5,B16]
[I5] 1E
R404
VDDDA +VD
[A5] 1E [B11]
R454
VDDDB
[I5] 1E
R417 R466
VDDAA +3V3A
[5,C16]
1E 1E
R467 C465
VDDAB
[I4] 1E 10u
R470
+3V3GAR
[5,B16]
0E
C475
C472 C473 C474 C476 100n
100n 100n 100n 100n
ROM_ADDR
ROM_DATA
[5,J11]
156 NC
NC
155 TLON
IO9EXDTA
154 DEBUG2
EXTMA0
153 ROM_CS0
D16CS0
152
ROM_A18
D16CS1A18
151 ROM_A19
D16CS2A19
150
ROMREAD
ROMRD
149 ROMWR
ROMWR
148
VSS
147 +VD [B11]
VDD
146
ROMRST
145 DACTESTT
IO8
144 RAM_D7
RAMD7
143 RAM_D6
RAMD6
142 RAM_D5
RAMD5
141 RAM_D4
RAMD4
140 RAM_D3
RAMD3
D471 139 RAM_D2
RAMD2
138 RAM_D1
RAMD1
137 RAM_D0
RAMD0
136
D08CS0
135 DEBUG1
D08CS1
134 NC
D08CS2
133
RAMRD
D-ASIC
132
RAMWR
131
VSS
130 +VD
VDD [B11]
129
RAMA0
128
RAMA1
127
RAMA2
126
RAMA3
MOT0002N1 125
RAMA4
124
RAMA5
123
RAMA6
122
RAMA7
121
RAMA8
120
RAMA9
119
RAMA10
118
RAMA11
117
RAMA12
116
RAMA13
115
RAMA14
114
VSS
113 +VD
VDD [B11]
112
RAMA15
111
RAMA16
110
RAMA17
109
RAMA18
108 RXD2
RXD2
107 TXD2
TXD2
106
EMUL
105 +VD
NC
R484
NC
R486
10K
STBY_B
[J3] To ADC's for
STBY_A
[C3] PCB version <8
BUZZER
SADC_BUS
FREQPS
[5,G15]
Dotted line for PCB <8
MAINVAL
[5,F15]
R469
BATIDENT
100K [5,B5]
3 B403
R499
VGARVALF
25MHz
56K2
PWRONOFF
1
[5,G16]
C489
RXD
[5,H15]
TXD
[5,H15]
C482 C481
22n
22p 22p
(not for PCB <8)
Figure 9-4. Circuit Diagram 4, Digital Circuit
14 15 16 17
D474
28F400 TP488
AM29LV800B
L481
ROM_A16 48
A16
47u
47 1 ROM_A15
BYTE# A15
46 2 ROM_A14
GND A14
ROM_D15 45 3 ROM_A13
DQ15/A_1 A13
ROM_D07 44 4 ROM_A12
DQ7 A12
ROM_D14 43 5 ROM_A11
DQ14 A11
ROM_D06 42 6 ROM_A10
DQ6 A10
ROM_D13 41 7 ROM_A09
DQ13 A9
ROM_D05 40 8 ROM_A08
DQ5 A8
ROM_D12 39 9
DQ12 NC
ROM_D04 38 10
DQ4 NC
37 11 ROMWRITE
VCC WE#
12 ROMRST
RP#
ROM_D11 36
DQ11
ROM_D03 35 13
DQ3 VPP
ROM_D10 34 14 +VD
DQ10 WP# [B11]
ROM_D02 33 15
DQ2 RY
ROM_D09 32 16 ROM_A18
DQ9 A18
ROM_D01 31 17 ROM_A17
DQ1 A17 R488
ROM_D08 30 18 ROM_A07
DQ8 A7 0E
ROM_D00 29 19 ROM_A06
DQ0 A6
ROMREAD 28 20 ROM_A05
OE# A5
ROM_A19
27 21 ROM_A04
GND A4
R488 FOR INTEL
ROM_CS0 26 22 ROM_A03
CE# A3
ROM_A00 25 23 ROM_A02 16M ROM ONLY
A0 A2
ROM
24 ROM_A01
A1
ROMWRITE
ROM_ADDR
R481
0E
R483
OPTION
+VD
51K1
D480 R482 V471
D480
74LVC32 511E BAS85
74LVC32
2 C470
1
3 4
1
6
1
470P 5
Delay circuit for PCB version 8
Dotted connection for PCB version < 8
Direct connections for PCB version 8
Dotted connections and parts for PCB version < 8
+12VPROG
[5,B10]
V482 +VD
TP487
BAT54S
R482
ROMRST
10K
[3,E8]
R481 R483 C476
10K 100K 100n
RAM_DATA
D475
M5M51008 TP
RAM_CS0
RAM_A11 1 A11 32 READRAM
OE
RAM_A09 2 A9 31 RAM_A10
A10
RAM_A08 3 A8 30 RAM_CS0
S1
READRAM
RAM_A13 4 A13 29 RAM_D7
DQ8
WRITERAM
WRITERAM 5 W 28 RAM_D6
DQ7
6 S2/A17 27 RAM_D5
DQ6
RAM_A15 7 A15 26 RAM_D4
DQ5
RAM_A00
8 VCC 25 RAM_D3
DQ4
RAM_A01
RAM_A18 9 NC/A18 GND 24
RAM_A02
RAM_A16 10 A16 23 RAM_D2
DQ3
RAM_A03
RAM_A14 11 A14 22 RAM_D1
DQ2
RAM_A04
RAM_A12 12 A12 21 RAM_D0
DQ1
RAM_A05
RAM_A07 13 A7 20 RAM_A00
A0
RAM_A06 RAM
RAM_A06 14 A6 19 RAM_A01
A1
RAM_A07
RAM_A05 15 A5 18 RAM_A02
A2
RAM_A08
RAM_A04 16 A4 17 RAM_A03
A3
RAM_A09
128X8 SRAM
RAM_A10
512X8 SRAM
RAM_A11
RAM_A12
[B11]
RAM_A13
R497
RAM_A14 +VD +VD
[B11]
0E
R498
OPTION
RAM_A18
RAM_A15
C478
RAM_A16
100n
RAM_A17
RAM_A18 RAM_ADDR
MS447
R498 R497
128x8 open 0E
256x8 open 0E
R491
512x8 0E open
51K1
OPTION
R485
V495
BSS84
R487
10K
PCA Version Detect
(not for PCB <8)
TP495
TP496
R495
3K16
BUZZER
H495
BUZZER
[5,H7]
R496
BUZ
3K16
VGARVAL
[5,B10]
4
+VD
[5,C16]
ST8089-2
00-01-12
ST8089.WMF