TTP-248M Bar Code Printer Service Manual
3.10 Motor System Circuit
EN_MA
EN_MB MOTER_C
INA_ R
/INA_R
INB_ R
/INB_R
| STEP | 1 | 2 |
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| INA_R |
| ON | ON |
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| /INA_R |
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| ON |
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| INB_R |
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| /INB_R |
| ON |
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| ON | |
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| Table 5. Stepping Motor Pattern |
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| VMM |
| C60 |
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| C29 |
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| 22 00 uF |
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| 0. 1u F | 5 |
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| MGND |
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| U13 |
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| V s |
| 7 |
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| BOOT1 |
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| VDD |
| U16 |
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| L6 50 6D_SO |
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| C40 |
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| 8 | IN1 |
| OUT1 | 6 | 15 nF | STEPPING_ MOTOR |
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| 13 | IN2 |
| OUT2 | 4 | R99 | JP14 |
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| C28 |
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| 0. 1u F |
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| C41 | 2 | |
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| 20 |
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| 17 | ENABLE |
| BOOT2 | 14 | 15 nF | 3 |
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| GND |
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| C52 |
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| 5 | IN2 | CCV |
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| OUT2 | 16 | 15 | CN CN CN CN | NDG NDG NDG NDG | CN CN | 16 | 0. 01 uF | 4PIN |
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| IN1 |
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| OUT1 |
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| Vref |
| SENSE |
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| 6 |
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| 15 | C48 |
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| 22 0n |
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| 7 | IN3 |
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| OUT3 | 14 |
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| L6 20 1PS |
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| GND | 9 | 1 | 3 2 |
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| 8 |
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| 13 |
| 12 18 19 | 11 10 20 |
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| IN4 |
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| OUT4 |
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| POWER_ENABLE |
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VDD | 3 | SYNC |
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| GND |
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| R100 | |||
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| 8. 2 | |
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| VSENSE2 |
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| 1 |
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| 19 |
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| R/C |
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| REF2 |
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| 0. 01 uF | ||
| R103 |
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22 K |
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| VSENSE1 | 12 |
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| 2 |
| NDG |
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| CN |
| CN | REF1 |
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| OSC |
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| U12 |
| L6 20 1PS |
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C56 |
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15 00 pF |
| 10 |
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| V s |
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| BOOT1 |
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GND |
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| GND |
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| C43 |
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| 8 | IN1 |
| OUT1 | 6 | 15 nF |
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| 13 | IN2 |
| OUT2 | 4 |
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| R93 |
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| C42 |
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| 2. 4K | 17 | ENABLE |
| BOOT2 | 14 | 15 nF |
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| 15 | Vref |
| SENSE | 16 |
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| R97 |
| ND ND ND ND |
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| 2. 4k | C49 | C C C C | C C |
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| 22 0n | N N N N G G G G | N N |
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| R89 | R89A | R90 | R90A |
GND | 9 | 1 | 3 2 | 1\ 5w | 1\5W | 1\ 5w | 1\5W |
GND | 12 18 19 | 11 10 20 |
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| GND |
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| MGND |
| MGOD |
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Fig. 3.8 Stepping Motor Circuit
MOTER_C pin is adjusted by CPU D/A (pin 206) to pass the current of motor. Pin EN_MA is used to enable U13 Driver.
Pin EN_MB is used to enable U12 Driver.
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