250V Patient Monitor Power Supply Mindray PM9000 PM8000 PM7000 MEC1000 MEC2000
|
|
Hospital Medical Parts Mindray PM9000 PM8000 PM7000 MEC1000 MEC2000 patient monitor power supply
► Brief Introduction
Power supply is an important part of the system, consisting of power board, backlight board, battery and fan. The main power board converts the AC mains input into 5V and 12V DC to energize other parts of the system. Similarly LCD display requires particular supply, for which case a backlight board is supplied. The battery could maintain the formal function of the system for a short period when AC mains is disconnected. A small fan requiring DC input is used to realize superior ventilation.
► Environment
► Schematic Diagram
► Introduction to Principle
This module converts 220V AC mains or battery power into 5V and 12V DC supplies to power other boards. If AC mains and battery coexist, the former take the priority to power the system and charge the latter at the same time. 1. AC/DC Convert high-voltage AC supply into low-voltage DC supplies to power subsequent circuits and charge the battery. 2. Battery Control Circuit If AC mains and battery coexist, this circuit controls the output from AC/DC part to charge the battery. If AC mains is disconnected, this circuit controls the battery to power the subsequent circuits. 3. 5V DC/DC Convert the DC supply from the previous circuit into stable 5V DC supply to power other boards. 4. 12V DC/DC Convert the DC supply from the previous circuit into stable 12V DC supply to power other boards. 5. Power Switch Circuit Control the working status of 5V DC/DC and 12V DC/DC in order to control ON/OFF action of the patient monitor. 6. Voltage Detect Circuit Detect the output voltages of various parts of the circuits; convert the analog signals into digital signals and send them into main board for further processing.
► Testing key points
After connecting AC mains, the DC voltage over C12 is about 1.3 ~
1.4 time of AC input voltage; voltage over C15 is 17.6V.
Voltage over C24 is 13.8V when battery is
disconnected. Voltage over C47 is 5V applied to power
U7, U8 and U9. Voltages of pin8 of U1, pin8 of U10 and pin11
of U11 to the ground are all 5V. Voltage of pin2 of U10 to the
ground is 2.5V. On the oscillograPHiliphhilip, we can observe
that voltage waves of pin4 of U11 and pin4 of U10 to the
ground are standard toothed waves of 120kHz oscillating
frequency. Voltage waves of pin1 of Q1 and pin1 of Q5 when
output is connected with rated load are square waves of about
120kHz frequency. Voltage wave of D16 is a square one of about
280kHz frequency.
Thank you for your time and interest in Hospital Medical Parts Mindray PM9000 PM8000 PM7000 MEC1000 MEC2000 patient monitor power supply. "Quality assurance" is our eternal pursuit and promise. Don't be hesitant to contact us! Welcome to place your orders. |
||||||||||||||||
| Product Tags: 250V Patient Monitor Power Supply PM8000 Patient Monitor Power Supply MEC2000 Patient Monitor Power Supply |
|
Mindray Patient Monitor Battery LI13I001A Suit For Ipm5 Ipm8 Ipm10 Ipm12 IMEC5 IMEC8 IMEC10 IMEC12 New |
|
051-000943-00 Patient Monitor Spo2 Board Mindray T1 IPM12 IPM10 IPM8 Imec8 Imec10 Imec12 |
|
Patient Monitor Printer Recorder TR60-F Mindray IMEC7 IMEC8 IMEC10 IMEC12 IPM8 IPM9 IPM10 IPM12 MEC T5 T6 T8 Series |
|
PHiliph MX400 MX450 MX Series Patient Monitor AC/DC IV2-FLEX ASSY-PWR AC / DC Power Supply 453564281221 |
|
P/N 453564271711 PHiliph MX400 Mx450 MX Series Patient Monitor Mainboard |
|
MX450 Patient Monitor Battery Board Power Supply Hospital Equipment |