Google+
Facebook
LinkedIn
Twitter
Digg
StumbleUpon
Home
Download PDF
Order CD-ROM
Order in Print
Section II. DESCRIPTION AND LEADING PARTICULARS
Figure 1-1. BH112JB-53 and BH112JB-79 Exhaust Gas Temperature Tester
Figure 1-2. Tester Block Diagram (Sheet 1 of 2)
Figure 1-2. Tester Block Diagram (Sheet 2 of 2).
(5) Insulation Check Circuit
Figure 1-3. Block Diagram of A/D Converter
(b) Equations
Figure 1-5. Charge-Discharge Curves of Linear A/D Converter
Figure 1-7. Typical Reference Voltage Shaping
Figure 1-8. Comparator
Figure 1-10. Circuitry That Generates Transfer-to-Memory.
Figure 1-12. Typical Display and Counter Board Circuitry.
Figure 1-13. Temperature Indicator Compensator.
Figure 1-14. Temperature Indicator Amplifier Circuit.
Figure 1-15. Temperature Indicator Reference Voltage Divider
Figure 1-16. Temperature Signal Flow Diagram (for Aircraft Indicator Check, Spread, Heater Probe, Trim, and Calibrator Signals .
Figure 1-17. Temperature Signal Flow Diagram (for Heater Probe Temp Set Signal)
Figure 1-18. Aircraft Indicator Check Circuit for DArsonval Indicators.
Figure 1-19. Aircraft Indicator Check Circuit for Null-Balanc Indicators.
Figure 1-20. Partial Schematic of Tach Converter.
Figure 1-21. % RPM Signal Flow Diagram.
(c) Standard Day Correction Circuit Schematic
Figure 1-22. Schematic Diagram of Standard Day Correction Circuit
Figure 1-23. Insulation Check Circuit (Simplified Schematic)
Figure 1-24. Resistance Check Circuit (Simplified Schematic)
(b) Plus and Minus 15 VDC Supply.
Figure 1-25. Power Flow Block Diagram
F i g u r e 1 - 2 6 . I n t e g a t e d C i r c u i t P i n L o c a t i o n s.
Figure 1-27. Quad 2 Input NOR Gate.
Figure 1-28. Dual D-Type Flip-Flop.
Figure 1-29. Triple 3-Input NAND Gate
Figure 1-30. Functional Diagram of 7-Stage Binary Counter.
Figure 1-31. Seven-Segment LED Display.
Table 1-4. LED Display Pin Functions
Table 1-5. Counter-Latch-Decoder Functional Truth Table
Table 1-6. Truth Table of 2- Input NAND Gate
T a b l e 1 - 7 . N O R G a t e T r u t h T a b le
Table 1-8. Truth Table for D-Type Flip-Flop
Table 1-9. J-K Flip-Flop Truth Table.
Table 1-10. Decade Counter Truth Table.
Table 1-11. Leading Particulars.
Figure 1-40. Tester Indicator and Controls
Table 1-12. Indicator and Control Functions.
Indicator and Control Functions (Continued).
Table 1-13. Accessory Functions
Table 1-14. Basic Accessories Required for Most Aircraft
Basic Accessories Required for most Aircraft (cont) - TM-55-4920-401-13P_68
Basic Accessories Required for most Aircraft (cont) - TM-55-4920-401-13P_69
Basic Accessories Required for most Aircraft (cont) - TM-55-4920-401-13P_70
Basic Accessories Required for most Aircraft (cont) - TM-55-4920-401-13P_71
Basic Accessories Required for most Aircraft (cont) - TM-55-4920-401-13P_72
Section III. TEST EQUIPMENT, SPECIAL TOOLS AND MATERIALS
Table 1-16. Consumable Materials
CHAPTER 2 OPERATING INSTRUCTIONS - TM-55-4920-401-13P_77
Figure 2-1. Thermocouple System Continuity Check Setup.
heater probe and heater probe cable
Figure 2-2. Temperature System Accuracy Check Setup.
2-4. Troubleshooting Temperature System.
Figure 2-3. Thermocouple and Harness Check Setup
Figure 2-4. DArsonval Temperature Indicator Check Setup.
d. Temperature Circuit Resistance Check (DArsonval Indicator(s)).
F i g u r e 2 - 6 . T e m p e r a t u r e C i r c u i t R e s i s t a n c e C h e c k S e t u p
Figure 2-8. Temperature Spread Teat Setup
Figure 2-9. Switch Box
Figure 2-11. Engine Trim Check Setup Using Trimmer Removed from Tester
2-7. RPM Indicator Check.
2-8. Heat Detection Systems Check (Fire Warning)
Figure 2-13. Heat Detection System Check Setup.
CHAPTER 3 AVIATION UNIT MAINTENANCE INSTRUCTIONS
Figure 3-1. Shipping Pallet.
b. Functional Inspection.
Section IV. PREVENTIVE MAINTENANCE
Table 3.2. Troubleshooting Table
Troubleshooting Table (Continued)
CHAPTER 4 AVIATION INTERMEDIATE MAINTENANCE INSTRUCTIONS
Figure 4-1. Temperature Indicator Test Setup.
Figure 4-2. % RPM Indicator Test Setup.
Table 4-2. Standard Day Circuit Test Table
Table 4-3. Spread Circuit Check Table
4-7. Trouble Analysis.
d. Troubleshooting the Temperature Compen- sator Circuits
Table 4-4. General Troubleshooting Table.
Table 4-7. Standard Day Circuit Troubleshooting Table.
Table 4-8. Heater Probe Control Circuit Troubleshooting Table.
Table 4-9. Insulation Check Circuit Troubleshooting Table.
Table 4-10. Resistance Check Circuit Troubleshooting Table.
Table 4-11. Aircraft Indicator Check Circuit Troubleshooting Table.
Table 4-12. DC Power Supply Voltages
Figure 4-4. Switch-Power Board, BH15720-3, Test Points
Figure 4-5. Probe Control and Function Switch Board, BH15801-1, Test Points (Sheet 1 of 2)
Figure 4-5. Probe Control and Function Switch Board, BH15801-1, Test Points (Sheet 2 of 2)
Figure 4-5. Calibrator Board, BH16365-1, Test Points
Figure 4-7. Indicator Waveforms
Figure 4-8. Temperature Board, BH 15715-1, Test Points
Figure 4-9. Tachometer Board, BH 15715-1, Test Points
Table 4-13. Indicator Data Table
Table 4-14. Heater Probe Control Circuit Waveforms
Heater Probe Control Circuit Waveforms. (Continued)
Figure 4-10. Trimmer Tester Points and Adjustments
4-8. SCHEMATIC DIAGRAMS
Figure 4-11. Trimmer Assembly, BH15195A-8, Schematic
Figure 4-12. Marker Board BH15719-2, Schematic
Figure 4-13. Display Board, BH16358-2, Schematic
Figure 4-14. Switch Box, BH123-3, Schematic.
F i g u r e 4 - 1 6 . H e a t e r C a b l e , B H 4 0 5 , S c h e m a t i c
Figure 4-19. Power Cable, BH499A, Schematic.
Figure 4-22. EGT Indicator Check Adapter, BH822, Schematic
Figure 4-25. Check Cable Adapter, BH1504, Schematic.
Section III. REPAIR PROCEDURES
Section IV. REASSEMBLY AND ALIGNMENT
4-15. Installation of Resistance and Insulation Check Ward
Section V. PARTS LISTING
4-19. Federal Supply Code List of Manu- parts lists of all tester assemblies. Included are ex- facturers.-cont
Figure 4-29. BH112JB-53 Jetcal T e s t e r.
Part Number - TM-55-4920-401-13P_142
Figure 4-30. BH16700-12 Accessory Kit.
Part Number - TM-55-4920-401-13P_144
Part Number - TM-55-4920-401-13P_145
Part Number - TM-55-4920-401-13P_146
Part Number - TM-55-4920-401-13P_147
Figure 4-31. BH15720-3 Switch -Power Circuit Board Assembly
Part Number - TM-55-4920-401-13P_149
Part Number - TM-55-4920-401-13P_150
Figure 4-32. BH 15719-2 Mother Circuit Board Assembly
Figure 4-33. BH 16358-2 Display Circuit Board Assembly
Part Number - TM-55-4920-401-13P_153
Figure 4-34. BH15715 -1 Temperature Circuit Board Assembly
Part Number - TM-55-4920-401-13P_155
Part Number - TM-55-4920-401-13P_156
Figure 4-35. BH15717 -1 Tachometer Circuit Board Assembly
Part Number - TM-55-4920-401-13P_158
Part Number - TM-55-4920-401-13P_159
Figure 4-36. BH16365 -1 Calibrator Circuit Board Assembly
Part Number - TM-55-4920-401-13P_161
Part Number - TM-55-4920-401-13P_162
Part Number - TM-55-4920-401-13P_163
Figure 4-37. BH15801-1 Probe Control-Function Switch Circuit Board Assembly
Part Number - TM-55-4920-401-13P_165
Figure 4-38. BH 16367 -3 Resistance-Insulation Circuit Board Assembly
Part Number - TM-55-4920-401-13P_167
Part Number - TM-55-4920-401-13P_168
Figure 4-39. H122 Accessory Case.
Part Number - TM-55-4920-401-13P_170
APPENDIX A REFERENCES
APPENDIX B MAINTENANCE ALLOCATION CHART - TM-55-4920-401-13P_173
B-2. Use of the Maintenance Allocation Chart.
f. Calibrate.
B-5. Maintenance Categories and Work Times
Section II. MAINTENANCE ALLOCATION CHART - TM-55-4920-401-13P_178
REMARKS TESTER, EXHAUST GAS TEMPERATURE
Section III. TOOL AND TEST EQUIPMENT REQUIREMENT
APPENDIX C REPAIR PARTS AND SPECIAL TOOLS LIST - TM-55-4920-401-13P_181
(1) Source Code.
(2) Maintenance Code.
(3) Recoverability Code. - TM-55-4920-401-13P_184
C-4. Explanation of Columns
C-5. Special Information
b. When National Stock Number or Part Number is Known
Figure 1. BH112JB-53 and BH112JB-79 Jetcal Tester
DESCRIPTION AND USABLE ON CODES - TM-55-4920-401-13P_189
Figure 2. BH16700-12 Accessory Kit
DESCRIPTION AND USABLE ON CODES
Figure 3. BH15720-3 Switch-Power Circuit Board Assembly
DESCRIPTION AND USABLE ON CODES - TM-55-4920-401-13P_193
DESCRIPTION AND USABLE ON CODES - TM-55-4920-401-13P_194
DESCRIPTION AND USABLE ON CODES - TM-55-4920-401-13P_195
DESCRIPTION AND USABLE ON CODES - TM-55-4920-401-13P_196
Figure 4. BH16358-2 Display Circuit Board Assembly
DESCRIPTION AND USABLE ON CODES - TM-55-4920-401-13P_199
Figure 5. BH15715-1 Temperature Circuit Board Assembly
Figure 6. BH15717-1 Tachometer Circuit Board Assembly - TM-55-4920-401-13P_202
DESCRIPTION AND USABLE ON CODES - TM-55-4920-401-13P_203
DESCRIPTION AND USABLE ON CODES - TM-55-4920-401-13P_204
Figure 6. BH15717-1 Tachometer Circuit Board Assembly - TM-55-4920-401-13P_206
DESCRIPTION AND USABLE ON CODES - TM-55-4920-401-13P_207
DESCRIPTION AND USABLE ON CODES - TM-55-4920-401-13P_208
Figure 7. BH16365-1 Calibrator Circuit Board Assembly
DESCRIPTION AND USABLE ON CODES - TM-55-4920-401-13P_211
DESCRIPTION AND USABLE ON CODES - TM-55-4920-401-13P_212
Figure 8. BH15801-1 Probe Control-Function Switch Circuit Board Assembly
DESCRIPTION AND USABLE ON CODES - TM-55-4920-401-13P_215
DESCRIPTION AND USABLE ON CODES - TM-55-4920-401-13P_216
DESCRIPTION AND USABLE ON CODES - TM-55-4920-401-13P_217
Figure 9. BH16367-3 Resistance-Insulation Circuit Board Assembly
DESCRIPTION AND USABLE ON CODE
Figure 10. H122 Accessory Case
DESCRIPTION AND USABLE ON CODE
Figure 11. Trimmer Assembly (Sheet 2 of 2)
DESCRIPTION AND USABLE ON CODE - TM-55-4920-401-13P_223
DESCRIPTION AND USABLE ON CODE - TM-55-4920-401-13P_224
DESCRIPTION AND USABLE ON CODE - TM-55-4920-401-13P_225
DESCRIPTION AND USABLE ON CODE - TM-55-4920-401-13P_226
Figure 12. Probe Controller Assembly
DESCRIPTION AND USABLE ON CODE - TM-55-4920-401-13P_229
DESCRIPTION AND USABLE ON CODE - TM-55-4920-401-13P_230
DESCRIPTION AND USABLE ON CODE - TM-55-4920-401-13P_231
NATIONAL STOCK NUMBER AND PART NUMBER INDEX - TM-55-4920-401-13P_232
Figure 13. Instrument Case Assembly
DESCRIPTION AND USABLE ON CODE - TM-55-4920-401-13P_235
SECTION IV NATIONAL STOCK NUMBER AND PART NUMBER INDEX
NATIONAL STOCK NUMBER INDEX
NATIONAL STOCK NUMBER INDEX
STOCK NUMBER - TM-55-4920-401-13P_239
STOCK NUMBER
PART NUMBER - TM-55-4920-401-13P_241
PART NUMBER - TM-55-4920-401-13P_242
PART NUMBER - TM-55-4920-401-13P_243
PART NUMBER - TM-55-4920-401-13P_244
PART NUMBER - TM-55-4920-401-13P_245
PART NUMBER - TM-55-4920-401-13P_246
PART NUMBER - TM-55-4920-401-13P_247
PART NUMBER - TM-55-4920-401-13P_248
PART NUMBER - TM-55-4920-401-13P_249
PART NUMBER - TM-55-4920-401-13P_250
PART NUMBER - TM-55-4920-401-13P_251
PART NUMBER - TM-55-4920-401-13P_252
FO-1 . Schematic Diagram of Heater Probe Control Circuit
FO-2. Probe Controller Assembly, BH15194A-4, Schematic
F0-3. Switch-Power Board, BH15720-3, Schematic
FO-4. Temperature Board, BH15715-1 , Schematic
F0-5. Tachometer Board, BH15717-1, Schematic
F0-6. Calibrator Board, BH16365-1, Schematic
F0-7. BH15195A-8 Trimmer Assembly
FO-8. BH15194A-4 Probe Controller Assembly
FO-9. BH15835-2 Instrument Case Assembly
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business
