Mindray Trio - Thermal Head; TR60-C Recorder

Hardware Overview Theory of Operation
1 - 12 0070-10-0591-01 Trio™ Service Manual
Audio Process Circuit
Generates audio signals to drive the speaker.
Watchdog
• Upon power-up, supply Reset signal to CPU
• Provide functions of Watchdog Timer Output and voltage detection.
1.2.7 TR60-C Recorder
FIGURE 1-9 Block Diagram of TR60-C drive board
1.2.7.1 Detailed Description
Thermal Head
The thermal head, the core component in the TR60-C recorder, is the PTMBL1300A thermal
head, manufactured by the ALPS company.
Key test points
NO. NAME LOCATION FUNCTION
1.
5V/5B J5 pin 1 Power input, range: 4.0~5.5V
2.
GND J5 pin 2 Power supply and signal ground
3.
RST J5 pin 3 CPU reset signal. At low level(<0.8V (during
normal operation)
4.
Crystal oscillator X1 pin 1,X1 pin 2 CPU crystal oscillator. Sine wave signal
1.5~3.5V (during normal operation)
Thermal Head
CPU
cpld 9536
Status Detection
Motor
driver
Signal & 5 V
DC/DC
12 V > 8 V