VM88 VM88
22 23
4. CIRCUIT AND BLOCK DIAGRAMS
DISPLAY, LCD, VM88
D+5
C302
0.01
DGND
R301
220K
DGND
D-15 DGND
D+5
C301
10/16
DGND
D200
LED_R
D201
LED_Y
D202
LED_Y
D203
LED_Y
D204
LED_Y
D205
LED_G
D300
LED_R
D301
LED_Y
D302
LED_Y
D303
LED_Y
D304
LED_Y
D305
LED_G
DI G2A
DI G3A
D206
LED_G
D207
LED_G
D306
LED_G
D307
LED_G
OL
OL
-3
-3
-6
-6
-9
-9
-12
-12
-24
-24
-36
-36
-18
-18
J101
CON N - M - 3 0
D400
LED_Y
+48V
R302
1K
R303
1K
R304
1K
R305
1K
R306
1K
R307
3.9K
D+5
D-15
2
R311
5KB
R308
6.2K
D+5
C307
0.01
C303
0.01
C304
0.01
C305
0.01
C306
0.01
DGND
SEG22
SEG21
SEG20
SEG19
SEG18
SEG17
SEG16
SEG15
SEG14
SEG13
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
U302
LCD_FD4
SEG22
SEG21
SEG20
SEG19
SEG18
SEG17
SEG16
SEG15
SEG14
SEG13
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
GND
OSCI
U301
HD44780U
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
DGND
LCD_D7
LCD_D6
LCD_D5
LCD_D4
LCD_D3
LCD_D2
LCD_D1
LCD_D0
E
R/W
RS
D+5
D+5
LEDK0
LEDK1
LEDK2
LEDK3
LEDK4
LEDK5
LEDK6
LEDK7
>
>
>
>
>
>
>
>
>
>
>
OSCO
V1
V2
V3
V4
V5
CL1
CL2
VCC
M
D
RS
R/W
E
DB0
DB1
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
RS
R/W
E
LCD_D0
LCD_D1
3
1
LED METER
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
SEG32
SEG33
SEG34
SEG35
SEG36
SEG37
SEG38
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
SEG32
SEG33
SEG34
SEG35
SEG36
SEG37
SEG38
SEG39
SEG40
COM16
COM15
COM14
COM13
COM12
COM11
COM10
COM9
COM8
COM7
COM6
COM5
COM4
COM3
COM2
COM1
DB7
DB6
DB5
DB4
DB3
DB2
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
SEG39
SEG40
COM16
COM15
COM14
COM13
COM12
COM11
COM10
COM9
COM8
COM7
COM6
COM5
COM4
COM3
COM2
COM1
LCD_D7
LCD_D6
LCD_D5
LCD_D4
LCD_D3
LCD_D2
SEG [1...40]
COM [1...16]
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
SEG32
SEG33
SEG34
SEG35
SEG36
SEG37
SEG38
SEG39
SEG40
SEG5
SEG4
SEG3
SEG2
SEG1
COM9
COM10
COM11
COM12
COM13
COM14
COM15
COM16
SEG6
SEG7
SEG8
SEG9
SEG10
SEG16
SEG37
SEG38
SEG39
SEG40
SEG13
SEG18
SEG23
SEG28
SEG33
COM9
COM10
COM11
COM12
COM13
COM7
COM6
COM5
COM4
COM3
COM2
COM1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
SEG32
SEG33
SEG34
SEG35
SEG36
SEG37
SEG38
SEG39
SEG40
U302
LCD_FD4
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
SEG5
SEG4
SEG3
SEG2
SEG1
COM9
COM10
COM11
COM12
COM13
COM14
COM15
COM16
SEG6
SEG7
SEG8
SEG9
SEG10
SEG16
SEG37
SEG38
SEG39
SEG40
SEG13
SEG18
SEG23
SEG28
SEG33
COM9
COM10
COM11
COM12
COM13
COM7
COM6
COM5
COM4
COM3
COM2
COM1
L301
DGND
LAMP
D+5
L302
DGND
LAMP
D+5
LEDK [0...7]
DIODEs
Ref. No. Part No. Description
D001 8234 1079 00 HT, 80V, 0.2A, MA171
D002~004 8234 1085 00 HT, fast recovery, D1NL40
D006 8234 5039 76 HT, zener, MTZ J 24
D008 8234 5052 00 V, 600V, 1.7A, S2V60-4002
D009 8234 1077 00 STACK, 600VAC, 1.5A, D2SBA60
D010 8234 5007 00 HT, 1SS136
D020 8234 1085 00 HT, fast recovery, D1NL40
D100 8234 5007 00 HT, 1SS136
RESISTORs
Ref. No. Part No. Description
R001 8230 1386 29 HT, carbon, 1/4W, 6.2Ω, 5%
R002 8230 1387 50 HT, carbon, 1/4W, 75Ω, 5%
R003 8230 1381 03 HT, carbon, 1/4W, 10kΩ, 5%
R004 8230 1381 01 HT, carbon, 1/4W, 100Ω, 5%
R005 8230 1381 52 HT, carbon, 1/4W, 1.5kΩ, 5%
R006 8230 1381 12 HT, carbon, 1/4W, 1.1kΩ, 5%
R007 8230 1384 73 HT, carbon, 1/4W, 47kΩ, 5%
R008 8230 1251 04 H, metal, 2W, 100kΩ, 5%, F20, RSS
R009 8230 1386 29 HT, carbon, 1/4W, 6.2 , 5%
R022 8230 1381 03 HT, carbon, 1/4W, 10kΩ, 5%
CAPACITORs
ALU = Electrolytic type
CER = Ceramic type
Ref. No. Part No. Description
C001, 002 8232 3542 22 VT, CER, 250V, 0.0022µF, 20%,
ECK-ZNS
C003 8232 3521 04 V, PES, 250VAC, 0.1µF, 20%, ECQ-UMV
C004 8232 1464 74 VT, ALU, 50V, 0.47µF, 20%, SME-VB
C006, 007 8232 8181 04 VT, CER, 25V, 0.1µF, +80-20%, YF
C008 8232 3241 07 V, ALU, 400V, 100µF, 20%,
SMH-VNSN, D2
C009, 010 8232 3824 76 VT, ALU, 63V, 47µF, 20%, LXV, D8
C012~014 8232 3574 77 VT, ALU, 16V, 470µF, 20%, LXV, D10
C015, 016 8232 3584 77 VT, ALU, 25V, 470µF, 20%, LXV, D10
C017, 018 8232 1434 77 VT, ALU, 16V, 470µF, 20%, SME, D10
C020 8232 0964 76 V, ALU, 25V, 47mF, 20%, SME
C021, 022 8232 3542 22 VT, CER, 250V, 0.0022µF, 20%,
ECK-ZNS
C024 8232 8031 03 VT, CER, 50V, 0.01µF, +80-20%, YF
C026, 027 8232 8031 03 VT, CER, 50V, 0.01µF, +80-20%, YF
C028 N/A
C029 8232 3491 03 VT, PES, 630V, 0.01µF, 10%,
ECQ-EKF3
C030 8232 8181 04 VT, CER, 25V, 0.1µF, +80-20%, YF
C040 N/A
C041 8232 1431 06 VT, ALU, 16V, 1µF, 20%, SME-VB
C101, 102 8232 8031 03 VT, CER, 50V, 0.01µF, +80-20%, YF
MISCELLANEOUS
Ref. No. Part No. Description
B100 8239 1200 00 Battery, 3V, CR2032
F001 8239 8010 08 Fuse, VT, semko, TLAG, 0.8A, 250V, TR5-T
J002 8245 3210 00 Connector, PL , jack, AC INLET, 3P, 0714-FR7
J003 8245 1711 11 Connector, PI , jack, 8283, 11P, WHT
L001 8242 2741 83 Filter, line, 18mH, 0.5A, ELF18D210
L002 8242 2491 02 Filter, line, 1mH, 2.2A, ELFI5N022A
L003 8242 2501 03 Coil, PV, 10µH, 2A, ELC
L004, 005 8242 1340 01 Filter, EMI, 6 hole
S001 8253 4610 02 SW, P, push, power, SDDLB1-B1-F2
T001 8242 2650 00 Transformer, sw power, ER2810, 5-53-18
W001 8277 1630 15 Cable assy, earth lug, SIN1.8, L150
E101 Wire, jumper, F5
E102 Wire, jumper, F10
!
!
Ref. No. Part No. Description
8274 2740 00 PCB Assy, Key, VM88
8251 9952 01 Plain PCB, Key, VM88
ICs
Ref. No. Part No. Description
U100 8256 1870 00 Module, jog, SRGPWJ
DIODEs
Ref. No. Part No. Description
D101~109 8234 5007 00 HT, 1SS136
D111~117 8234 5040 04 Opt, VT, LED, grn, LT3E31W
D201~208 8234 5007 00 HT, 1SS136
D211~214 8234 5040 03 Opt, VT, LED, ylw, LT3H31W
D215 8234 5040 01 Opt, VT, LED, red, LT3D31W
D216 8234 5040 04 Opt, VT, LED, grn, LT3E31W
D217, 218 8234 5040 01 Opt, VT, LED, red, LT3D31W
RESISTORs
Ref. No. Part No. Description
R100~700 8240 2960 01 VR, slide, EWAQF, X05, 10kΩB
R101~109 N/A
R201~209 8230 1384 73 HT, carbon, 1/4W, 47kΩ, 5%
MISCELLANEOUS
Ref. No. Part No. Description
J104 8245 2721 17 Connector, PL, jack, FPC, 17P,
IMSA-9602S-17F
J106 8245 2721 17 Connector, PL, jack, FPC, 17P,
IMSA-9602S-17F
S101~109 8253 1350 02 SW, PT, tact, SKQNAB
S201~208 8253 1350 02 SW, PT, tact, SKQNAB
E101 Wire, jumper, F5
E102 Wire, jumper, F10
E103 Wire, jumper, F12.5
• Key PCB assy
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