TTP-248M Bar Code Printer
Service Manual
3.17 Optional Items Circuits
The following circuits provide optional detecting message or input/output control.
AD1
AD2
C80
0. 1uF
D11
1N41 48
R132
1K
AVSS
R135 10 0
D12 AVCC
1N41 48
1K R131
JP25
2
1
2PIN
C81
0. 1uF
D13
1N41 48
R134
1K
AVSS
R136 10 0
D14 AVCC
1N41 48
1K R133
JP26
2
1
2PIN
| VCC |
|
|
| R40 |
|
|
| 10 K | U4F |
|
|
|
| |
BUZZER_O | 13 | 12 | R71 |
| |||
|
| 10 0 | |
|
|
| |
|
| 74 HC14 |
|
VMM | JP11 |
| 2 |
| 1 |
Q1 BUZZER
HSC945
GND
Fig. 3. Optional Item---Buzzer
39
