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Serial Interface Converter Board Theory of Operation

1 - 14 0070-10-0591-01 Trio™ Service Manual

1.3 Serial Interface Converter Board

The Serial Interface Converter Board is used to convert the TTL level (5V) to RS232 level.

FIGURE 1-10 Serial Interface connection diagram

FIGURE 1-11 Block diagram of Serial Interface Converter Board

Host P .C.B.

P10

P13

P1 4

P1 7 ( F O R 5 0 9 C )

P11

P1 2

P1 5

P1 6

P2 ( C R T)

P4(TFT_DIGTAL )

P3(FOR 9000

VGA)

P7( BDM

)

Serial Coverter

P.C.B

Serial

interface

Converter Board

TTL Level

RS232 Level

DB9 Socket

RS232

Converter

chip

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 81 82

Service Manual 1
Foreword 6
Introduction Warning 7
Theory of Operation 8
NIBP, SpO 9
1.2 Hardware Overview 10
Key Test Points 11
1.2.3.1 Overview 13
1.2.3.2 Detailed Description 14
Display 15
LVDS Interface 15
Reset and Parameter Storage 15
Network Controller 15
1.2.4 Keypad Board 16
1.2.4.1 Detailed Description 16
1.2.5 Keypad Board 17
1.2.5.1 Detailed Description 17
Audio Process Circuit 17
Watchdog 17
1.2.6 Keypad Board 18
1.2.6.1 Detailed Description 18
1.2.7 TR60-C Recorder 19
1.2.7.1 Detailed Description 19
Thermal Head 19
CPU System 20
Power Conversion 20
Motor Drive 20
Status Detection 20
Host P .C.B 21
Serial Coverter 21
1.4.1 ECG 22
1.4.2 Respiration 22
1.4.3 NIBP 23
1.4.4 SpO 23
1.4.5 Temperature 24
1.4.6 IBP (optional) 24
Calibration/Maintenance 26
2.4.2 Maintenance Menu 27
2.4.2.1 Calibrations 28
IBP Pressure Cal 29
NIBP CAL 31
NIBP Pneumatic 32
2.4.3 Safety Tests 36
2.4.3.1 Leakage Current Tests 36
Case Leakage 36
Patient Leakage 36
2.5 Testing Each Parameter 37
2.5.2.2 Test Procedures 38
2.5.3 SpO 38
2.5.3.1 Test Equipment 38
2.5.3.2 Test Procedures 38
FIGURE 3-1 Main Sub-Assembly 40
FIGURE 3-7 Masimo SPO 46
Sub-Assembly 46
FIGURE 3-8 Nellcor SPO 47
3.2 Parts Listing 51
Repair Information 54
TFT LCD DISPLAY 0160-00-0075 56
FA N 0119-00-0197 56
0012-00-1492 57
To CPU PC 62
BD. (P5) 62
To Serial Port 62
4.3 ECG Cable Assembly 63
4.4 Troubleshooting 64
Operation, Recording 65
Power Board Failure 65
Parameter Failure 66
(R and F) 66
4.5 Disassembly Instructions 67
4.5.11 Removal of Handle 69
P/N 0012-00-1255-XX 70
4.7 ECG Shielded Lead Wires 71
P/N 0012-00-1261-XX 72
Metric Panhead Screw M4X16 73
0211-13-0416-00 73
Trio Mouting Bracket Kit 73
0040-00-0338 73
Trio Wall MountKit 74
Trio VHM Wall Mount Kit 74
FIGURE 4-10 Trio roll stand 75
Appendix 76
0002-08-8918 82

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