Fluke 87 V/AN Service Manual page 49

TEST POINTS
REF DES NAME REF DES NAME
TP1 S1-9
TP2 S1-14 SERIAL COMM
TP3 S1-10 TP23 RXD
TP4 S1-3 TP24 TXD
TP5 S1-1
TP6 S1-6 JTAG
TP7 S1-7 TP25 TDO
TP8 S1-8 TP26,27 TDI
TP9 S1-8 TP28 -2.5
TP10 S1-5 TP29,30 TMS
TP11 S1-4 TP31 TCK
TP32,33 RST*
TP12 GND TP34,38 +0.8
TP13 Vbe
TP14 BACKLIGHT BOOTLOAD
TP15 BTP TP35 BRXD
TP16 POWER TP36 PB3/BTXD
TP17 +2.5
TP18 LCD_R23 MODEL
TP19 LCD_R13 TP37 MODEL
TP20 SWPOS
TP21 VRSOB
TP22 LOWBATT
BEEPER
MODEL SELECTION
U5 U5
4 3 2 1
CD4069 CD4069
+0.8 U5
U5 U5
6 5 8 9 10
TP37
2
CD4069 CD4069 CD4069
R98
5
LS1
C11
100K NOLOAD
470P
1 R108 R44
MODEL
0.0 475K
R97
6
100K
MMBT5089
-2.5
RSOB POSITION
-2.5
R61
100K
S1
VAC R60
16
15
VDC 100K R59
18
TP20
mVDC 100K R58
20
19
Ohms 100K TP21
SWPOS
22
Diode Test R55
23 24
mA/Amps R54 100K
25 26
uAmps R53 100K
23 28
100K
R22 C20
0.1U R84
1.00M
200K
SWPWR
-2.5
A/D CONVERTER
+2.5
C21,22 NEAR U3
C21 C22
2
0.1U 10U
VCC 14
F0
10V
U3
3
REF
ADSCK
13
SCK
4
REF
MMBT5089
LTC2435-1
R31
ADIN DOUT
5 12
VIN SDO
49.9K
ADCS*
6 11
VIN CS
GND
1 7 8 9 10 15 16
-2.5
BTP
POWER SUPPLY
M2
Q13
TP15 IRLML6302
2 3
S
1
R80
1.00M
R73 R74
1.00M 1.00M
J3
CR3
TP3
GF1B
1
TP1
C12
9V 2
0.1U
MOMENTARY ON
S1
Q14 9 10
MMBT3904
S1
9 14
TP2
OFF
M3
BTM
BTP
BACKLIGHT
DS3
NSCW100
BTP
TP14
14
U5
11 12 13
Q8
MMBT5089
CD4069 7
Q4
R47 MMBT5089 R50
12.1
475K
Q17
MMBT5089
R19 R46
Q5 BPR
R99
HIBEAM
1.00K
R96
40.2K
32.4 5.62K
R14
BTM
5.62K
-2.5
BKLT
+0.8
PUSHBUTTON SWITCHES
R40 R43 R68
100K 100K 100K
SHIFT MINMX RANGE HOLD BKLT BEEP REL HZ
2 2 2 2 2 2 2 2
S10 S7 S8 S6 S9 S4 S5 S3
1 1 1 1 1 1 1 1
IR COMMUNICATION
DEVELOPMENT ONLY +0.8
RXEN +0.8
DS1
4
SFH325FA
NOLOAD
R63
R65
10.0K
4.7K
RXD R64
TXD Q12
MMBT3906
1.00K
Q10 Q11
MMBT5089
R66
4
C24 R62 100
0.0082U
1.00K
NOLOAD
DS2
4
SFH426
NOLOAD
-2.5
-2.5
TP17
TP16
U10
1 5
IN OUT
TPS77050
R15
5.0V
3 4
845K
EN NC
C14
GND
0.1U
2
U6
4 5
IN OUT
TPS71533 4
3.3V C13 U8
1 3
4.7U
NC NC
LT1790
NOLOAD
C28
GND R16 4
VIN
VOUT
226K
2
0.1U C15 GND GND
1
4.7U
16V
TP22
COMPARE TO 1.2 V
MICROPROCESSOR
LOCATE C18, C19 NEAR PIN 100, TRACE TO 98
LOCATE C25, C29 NEAR PIN 1 AND 60, TRACE TO 99
+0.8 +0.8
C18
C19
C25
10U
0.1U
0.1U
10V
R21
10.0K
-2.5
-2.5
11 10
C8
0.1U
VEREF VREF
RST* 94
RST*/NMI P5.7/R33
P5.6/R23
89
XT2IN P5.5/R13
1 88
XT2OUT
MSP430F448
Y1
8 U2
32.768KHZ XIN URXD1/P4.1
9
3
XOUT/TCLK UTXD1/P4.0
2
TCK 93
TCK P4.2/STE1/S39
TMS
92
TMS P4.3/SIMO1/S38
-2.5
TDI 91
TDI P4.4/SOMI1/S37
TDO
90
TDO/TDI P4.5/UCLK/S36
P4.6/S35
P4.7/S34
LOWBATT 6
P6.7/A7/SUSIN
SWPOS
5
P6.6/A6
LPSW 4
P6.5/A5
MAJACK
3
AJACK P6.4/A4
2
P6.3/A3
97
FASTADIN P6.2/A2
96
P6.1/A1
MODEL
95
+0.8
P6.0/A0
PB1
80
5
P1.7/CA1
ODCMP 1 PB2 81
P1.6/CA0
4 DCMP
82
U14
P1.5/TACLK/ACLK
2 SMCLK 83
P1.4/TBCLK/SMCLK
DOUT
84
7S08 3 P1.3/TBOUTH/SVSOUT
ICNTL 85
P1.2/TA1
BRXD
86
-2.5
P1.1/TA0/MCLK
PB3/BTXD 87
P1.0/TA0
PB1
PB2 PB4
72
P2.7/ADC12CLK
PB3/BTXD PB5
73
P2.6/CAOUT
RXD
TP23 74
P2.5/URXD0
TXD
75
TP24
P2.4/UTXD0
MUXSW2
76
P2.3/TB2
CAL 77
2
P2.2/TB1
78
P2.1/TB0
PB6
S11 79
P2.0/TA2
BPR
64
1
P3.7/TB6
BKLT
65
P3.6/TB5
AC*
66
P3.5/TB4
PB4 LOWPASS
67
P3.4/TB3
PB5 SWPWR 68
P3.3/UCLK0
PB6 V5*
69
P3.2/SOMI0
HIBEAM 70
P3.1/SIMO0
RXEN
71
P3.0/STE0
FLASH / BOOT
TDO BRXD
TP25 TP35
-2.5
TDI PB3/BTXD
TP26 TP36
TP27
-2.5
TP28
TMS
TP29
TP30
TCK
TP31
RST*
TP32
TP33
+0.8
TP34
TP38
+2.5
+0.8
LCD COMPENSATION
2.5V
C50 C51
4
100P 100P
LCD_R33
6
NOLOAD
C57
0.01U R109 R110
2
C16 4
10.0 10.0
47U
NOLOAD
-2.5
TP18
LCD_R23
V5*
LOWBATT
TP19
LCD_R13
LOCATE C17, C27 NEAR PIN 10, TRACE TO 98
C27
C17
10U
0.1U
C29 10V
LCD_R03
10U
10V
-2.5
7
+ + LCD_R33
59
LCD_R23
58
57 LCD_R13
4.5 DIGIT LCD
LCD_R03
56
R03 COM3
ADSCK COM2
62
COM1
63 ACS*
COM0
51 APOR*
DIN
50
49
H1 H2 H3
ASCK
48
47 ADCS*
39
S35
46 SEG33 38
S34
45 SEG33 SEG32
37
S33 S33
SEG32
44 36
S32 SEG31 S32
43 SEG31
35
S31 S31 X22 X17 X11
SEG30
42 SEG30 34
S30 SEG29 S30 AR X23 X24
41 SEG29
33
S29 S29 BT4 B32 X26
SEG28
40 SEG28 32
S28 SEG27 S28 B31 B30 B29
39 SEG27
31
S27 S27 B24 B25 B26
SEG26
38 SEG26 30
S26 SEG25 S26 BT3 B23 B22
37 SEG25
29
S25 S25 B17 B18 B19
SEG24
36 SEG24 28
S24 S24 BT2 B16 X28
35 SEG23 SEG23
27
S23 S23 B15 B14 B13
SEG22
34 SEG22 26
S22 S22 B8 B9 B10
33 SEG21 SEG21
25
S21 S21 BT1 B7 B6
SEG20
32 SEG20 24
S20 S20 B1 B2 B3
31 SEG19 SEG19
23
S19 S19 BT0 B0 X30
SEG18
30 SEG18 22
S18 S18 X32 AL X33
29 SEG17 SEG17
19
S17 S17 X1 X37 X35
SEG16
28 SEG16 18
S16 S16 X2 X36 1B,C
SEG15 SEG15
27 17
S15 S15 2F 2G 2E
SEG14
26 SEG14 16
S14 S14 2A 2B 2C
SEG13 SEG13
25 15
S13 S13 3F 3G 3E
SEG12
24 SEG12 14
S12 S12 3A 3B 3C
SEG11 SEG11
23 13
S11 S11 4F 4G 4E
SEG10
22 SEG10 12
S10 S10 4A 4B 4C
21 SEG9 SEG9
11
S9 S9 5F 5G 5E
SEG8
20 SEG8 10
S8 S8 5A 5B 5C
19 SEG7 SEG7
9
S7 S7 X3 X4 ---
SEG6
18 SEG6 8
S6 S6 MIN MAX AVG
SEG5 SEG5
17 7
S5 S5 --- AC X7
SEG4
16 SEG4 6
S4 S4 --- --- X5
SEG3 SEG3
15 5
S3 S3 X10 X9 ---
SEG2
14 SEG2
4
S2 S2 X20 DEG_F X14
SEG1 SEG1
13 3
P5.0/S1 S1 MV X19 X13
SEG0
12 SEG0
2
P5.1/S0 S0 X21 X18 X12
COM3
COM2
COM1
COM0
8X-5-1001
(2 of 2)
Figure 8. A1 LED PCA (cont)
Digital Multimeter
Schematic Diagrams
R20
100K
RT2
50.0K
5%
R25
100K
R41
21.0K
R26
100K
R27
4.32K
-2.5
H4
U11
LCD40P
NOLOAD
X16
X25
MAN
B28
B27
B21
B20
AUTO
B12
B11
B5
B4
X29
---
X34
___
H1
2D
H2
3D
H3
4D
H4
5D
---
---
DC
X6
X8
X15
DEG_C
HZ
41