Atari CX 5200 Service Manual Download Page 49

Page: 49 / 101

CX5200 Field Service Manual

Black Screen Troubleshooting (cont.)

Is there approximately

11-13V on the input of

VR1?

Defective VR1or output

short to ground

(possible chip)

Is there approximately 0V

on point 2 of the

schematic?

Defective J1 or open

between point 1 of VR2 &

point 2 of VR1 with

cartridge in)

Defective:

1) Q6

2) R57

3) R56

Repair

Yes

***NOTE***

On PCB CA020108 chip designators
have been changed from U to A

Summary of Contents for CX 5200

Page 1: ......

Page 2: ...O ENTERTAINMENT SYSTEM ADVANCED VIDEO ENTERTAINMENT SYSTEM ADVANCED VIDEO ENTERTAINMENT SYSTEM ADVANCED VIDEO ENTERTAINMENT SYSTEM MODEL 5200 MODEL 5200 MODEL 5200 MODEL 5200TM TM TM TM FIELD SERVICE MANUAL FIELD SERVICE MANUAL FIELD SERVICE MANUAL FIELD SERVICE MANUAL ...

Page 3: ...inancial or otherwise shall be accepted for any consequences arising out of the use of this material Information contained herein is subject to change Revisions may be issued to advise of such changes and or additions Correspondence regarding this document should be forwarded to Director of Technical Support Consumer Product Service Atari Incorporated 845 W Maude Sunnyvale California 94086 ...

Page 4: ...ion Interface Controller ANTIC 13 Graphic Television Interface Adaptor GTIA 13 Pot Keyboard Integrated Circuit POKEY 14 Switchbox 15 Game Controller 15 2 SILKSCREENS AND SCHEMATICS 16 3 4 Port MODEL 5200 TESTING 3 1 Equipment Requirements 3 1 Testing with the Diagnostic Cartridge Version 1 1 3 1 Overview of Tests 3 1 Initialization 3 1 Power up Screen 3 3 Solid Slack Coloured Screen or Vertically ...

Page 5: ... Snowy Screen 3A 3 Warped Ragged Picture 3A 3 Colour Bar Test 3A 4 Grey Bar Test 3A 5 Any Video Screen 3A 6 Verify OS ROM 3A 7 Tone Test 3A 7 POKEY Port Test 3A 8 RAM Test 3A 8 POKEY Adjust Test 3A 9 POKEY Softfire Test 3A 10 4 4 Port 5200 DIAGNOSTIC FLOWCHART 4 1 Overview 4 1 The Swap out Procedure 4 1 Replace in Order 4 1 ATARI Repair Hotline 4 I 4A 2 Port 5200 DIAGNOSTIC FLOWCHART 4A 1 Swapout ...

Page 6: ...Motherboard Silkscreen 17 2 2 4 Port 5200 CA018087 Motherboard Schematic Part 1 18 2 3 4 Port 5200 CA018087 Motherboard Schematic Part 2 19 2 4 4 Port 5200 CA018087 Motherboard Schematic Part 3 20 2 5 4 Port 5200 CA020108 Motherboard Silkscreen 21 2 6 4 Port 5200 CA018108 Motherboard Schematic Part 1 22 2 7 4 Port 5200 CA018108 Motherboard Schematic Part 2 23 2 8 4 Port 5200 CA018108 Motherboard S...

Page 7: ...ssembly 6 8 6 5 Controller Top Underside 6 9 6 6 Select Switch Beze1 Removal 6 10 6 7 Controller Knob Removal 6 11 6 8 Pot Arm Positions for Assembly 6 11 6 9 CX52 Game Controller Schematic 6 13 7 1 Top Cover Assembly 7 2 7 2 Bottom Cover Assembly 7 3 7 3 Trakball Block Diagram 7 6 7 4 Diagonal or Circular Motion 7 8 7 5 Cue Ball Support 7 27 7 6 Top Cover Underside 7 28 7 7 Main PC Board 7 29 LIS...

Page 8: ...5200 SYMPTOM CHECKLIST Failure information to assist the experienced technician arrive at a rapid diagnosis of 4 Port Model 5200 problems 2 PORT 5200 SYMPTOM CHECKLLST Failure information to assist the experienced technician arrive at a rapid diagnosis of 2 Port Model 5200 problems GAME CONTROLLERS Overview of hand controller construction with electrical schematics and recommended test and repair ...

Page 9: ...onsoles Some models contain the original 4 Port PC Board number CA018087 Other consoles contain a 4 Port universal PC Board number CA020108 A third PC Board with only two player pots number CA021374 is also available Unless otherwise specified the references in this manual pertain to the original 4 Port PCB number CA018087 The specific differences of the 4 Port universal PCB and the 2 port univers...

Page 10: ...above are included on the 2 Port universal PCB 2 Ports 3 and 4 and their associated discrete components have been removed 3 Ics A12 and A13 have been removed 4 The automatic switchbox has been replaced with a manual switchbox and the RF cable has been replaced with the standard RF cable 5 The power adaptor plugs directly into the rear of the console instead of plugging into the switchbox Figure 1 ...

Page 11: ...over provides 1 openings at the front for the four player ports 2 the power switch cover 3 the power ON OFF switch 4 a storage area at the rear for two game controllers The hinged cover for this area comes off as a separate piece when the top cover is disassembled RF Shield An aluminium shield covers the PC Board and prevents the PC Board from generating interference on the T V screen PC Board The...

Page 12: ...4 a cartridge socket an RF module various discrete components The major chips on the PC Board are Microprocessor Chip Microprocessor Chip Microprocessor Chip Microprocessor Chip MPU MPU MPU MPU The microprocessor MPU is the brain of the 5200 It makes the major decisions based on information from the ROM cartridge and the Random Access Memory Figure 1 3 shows the pin assignments for the MPU Figure ...

Page 13: ... from memory independent of the processor for display on the video screen Figure 1 4 shows the pin assignments for the ANTIC Figure 1 4 ANTIC Pin Assignments Graphic Television Interface Adaptor GTIA Graphic Television Interface Adaptor GTIA Graphic Television Interface Adaptor GTIA Graphic Television Interface Adaptor GTIA The Graphic Television Interface Adaptor GTIA chip retrieves graphics data...

Page 14: ...ted Circuit POKEY POT Keyboard Integrated Circuit POKEY The Pot Keyboard Integrated Circuit POKEY chip provides the interface between the game ports and the microprocessor It also contains four semi independent audio channels each with its own frequency noise and volume control Figure 1 6 shows the pin assignments of the POKEY Figure 1 6 POKEY Pin Assignments ...

Page 15: ...ame controller troller troller troller The game controller supplied with the Model 5200 is composed of an analog joystick a 12 key Keypad two separate Fire Buttons on each side and three Select Buttons The game controller is discussed in detail in Section 6 SUMMARY The Model 5200 is an advanced microcomputer which receives input from the Game Controllers Read Only Memory ROM cartridges and other p...

Page 16: ...CREENS AND SCHEMATICS SILKSCREENS AND SCHEMATICS On the following pages are representative silkscreens and schematics for the Model 5200 Minor variations in design may be encountered depending on the production date of the unit but these schematics provide all details required for an in depth understanding of all Model 5200 units ...

Page 17: ...CX5200 Field Service Manual 17 Figure 2 1 4 Port 5200 CA018087 Motherboard Silkscreen ...

Page 18: ...CX5200 Field Service Manual 18 Figure 2 2 4 Port 5200 CA018087 Motherboard Schematic Part 1 ...

Page 19: ...CX5200 Field Service Manual 19 Figure 2 3 4 Port 5200 CA018087 Motherboard Schematic Part 3 ...

Page 20: ...CX5200 Field Service Manual 20 Figure 2 4 4 Port 5200 CA018087 Motherboard Schematic Part 3 ...

Page 21: ...CX5200 Field Service Manual 21 Figure 2 5 4 Port 5200 CA020108 Motherboard Silkscreen ...

Page 22: ...CX5200 Field Service Manual 22 Figure 2 6 4 Port 5200 CA020108 Motherboard Schematic Part1 ...

Page 23: ...CX5200 Field Service Manual 23 Figure 2 7 4 Port 5200 CA020108 Motherboard Schematic Part2 ...

Page 24: ...CX5200 Field Service Manual 24 Figure 2 8 4 Port 5200 CA020108 Motherboard Schematic Part 3 ...

Page 25: ...CX5200 Field Service Manual 25 Figure 2 9 2 Port 5200 CA021374 Motherboard Silkscreen ...

Page 26: ...CX5200 Field Service Manual 26 Figure 2 10 2 Port 5200 CA021374 Motherboard Schematic Part 1 ...

Page 27: ...CX5200 Field Service Manual 27 Figure 2 11 2 Port 5200 CA021374 Motherboard Schematic Part 2 ...

Page 28: ...CX5200 Field Service Manual 28 Figure 2 12 2 Port 5200 CA021374 Motherboard Schematic Part 3 ...

Page 29: ...CX5200 Field Service Manual 29 Figure 2 13 Trakball Silkscreen ...

Page 30: ...CX5200 Field Service Manual 30 Figure 2 14 Trakball Schematic Part1 ...

Page 31: ...CX5200 Field Service Manual 31 Figure 2 15 Trakball Schematic Part 2 ...

Page 32: ...ing the source of problems in the Model 5200 The test cartridge is used in conjunction with the equipment listed at the beginning of this section INITIALIZATION To prepare the Model 5200 for testing perform the following steps in the order given Connect the switchbox to the VHF terminals on the back of the T V Set r Plug the power adaptor into the opening on the switchbox marked Power Plug the RF ...

Page 33: ...ically appear again One of the following indicates a failure Solid Coloured Black Screen or Vertically Lined Screen Snowy Screen WARPED Ragged Picture Solid Coloured Black Screen or Vertically Lined Screen If a solid coloured Black or vertically lined screen appears the unit is suffering a catastrophic failure This means that the unit is not functioning well enough to even put up a simple display ...

Page 34: ...ar with the Port Board plugged in If a test fails go to the Flowchart Entry Point indicated for that test and begin troubleshooting COLORBARS TEST Purpose To test the GTIA chip and associated colour circuitry for correct operation Format A screen of horizontal colour bars displays see Figure 3 3 The screen should be steady and unchanging A grey or blue horizontal reference line runs across the scr...

Page 35: ...n even steps see Figure 3 2 The screen should be steady and unchanging These lines may have minor glitches on their edges A thin white line always appears just over the top black bar No colour should appear anywhere on the screen The areas above the top black bar and below the bottom white bar are of no importance to the test This test should be left on for at least ten seconds to ensure that ther...

Page 36: ...From left to right the shade of colour on the horizontal bar should change On the right of the bar two Vs should be displayed right side up Figure 3 5 Anyvideo Test Screen If the Any Video test fails replace U3 U5 POKEY ADJUST Purpose To check the value of the pot line for the controller ports Format Adjust R132 to make the value in Port 1 HOR position read 112 1 All other values should read betwe...

Page 37: ...Press the top fire button softfire 5 A 5V pp square wave signal should appear Fig 3 7 If it does not proceed to the SOFTFIRE TROUBLESHOOTING FLOWCHART page 64 6 Unplug the controller from port and plug it into next port 7 Repeat the fourth and fifth steps for port 2 3 and 4 Fig 3 7 Softfire signal ERROR SUMMARY Errors during the RAM PORT and verify OS ROM Test are displayed on the matrix shown in ...

Page 38: ...9 7 RAM Chip 8 U18 8 Port 1 Data Keyboard Keyboard Troubleshooting Pg 4 21 9 Port 2 Data Keyboard 10 Port 3 Data Keyboard 11 Port 4 Data Keyboard 12 Trigger 0 Trigger Line Troubleshooting Pg 4 19 13 Trigger 1 14 Trigger 2 15 Trigger 3 16 Soft Fire 0 Softfire Troubleshooting Pg 4 20 17 Soft Fire 1 18 Soft Fire 2 19 Soft Fire 3 20 Serial Port 0 Not Used 21 Serial Port 1 Not Used 22 Pot Line 0 Pot Li...

Page 39: ...ctioning Format If error code 30 appears on the Error Summary Figure 3 7 the OS ROM chip is defective Replace the defective chip and restart the test No Diagnostic Flowchart Entry Point PORT TEST Purpose This test checks the functions of the POKEY GTIA and associated PORT circuitry Format The test is done internally with failures appearing on the Error Summary Figure 3 7 Diagnostic Flowchart Entry...

Page 40: ...owchart where indicated and continue troubleshooting OVERVIEW OF TESTS The Diagnostic Cartridge Version 1 0 contains a variety of test routines to assist you in identifying the source of problems in the 5200 The test cartridge is used in conjunction with the equipment Listed at the beginning of this section The tests available in the cartridge are INITIALIZATION To prepare the 5200 for testing per...

Page 41: ...e Solid Coloured Black Screen or Vertically Lined Screen Snowy Screen WARPED Ragged Picture Solid Coloured Black Screen or Vertically Lined Screen If a solid coloured Black or vertically lined screen appears the unit is suffering a catastrophic failure This means that the unit is not functioning well enough to even put up a simple display Diagnostic Flowchart Entry Point Pg 73 Snowy Screen If when...

Page 42: ...r with the Port Board plugged in If a test fails go to the Flowchart Entry Point indicated for that test and begin troubleshooting COLOUR BAR TEST Purpose To test the GTIA chip and associated colour circuitry for correct operation Format A screen of horizontal colour bars displays see Figure 3 1 The screen should be steady and unchanging A grey or blue horizontal reference line runs across the scr...

Page 43: ...n even steps see Figure 3A 4 The screen should be steady and unchanging These lines may have minor glitches on their edges A thin white line always appears just over the top black bar No colour should appear anywhere on the screen The areas above the top black bar and below the bottom white bar are of no importance to the test This test should be left on for at least ten seconds to ensure that the...

Page 44: ... left to right the shade of colour on the horizontal bar should change On the right of the bar two Vs should be displayed right side up Figure 3A 5 Any Video Test Screen If the Any Video test fails replace A3 A5 POKEY ADJUST TEST Purpose To check the value of the pot line for the controller ports Format Adjust R132 to make the value in Port 1 HOR position read 112 1 All other values should read be...

Page 45: ...roller into port 1 10 Press key 5 followed by START 11 Press the top fire button softfire 12 A 5V pp square wave signal should appear Fig 3A 8 If it does not proceed to the SOFTFIRE TROUBLESHOOTING FLOWCHART page 89 13 Unplug the controller from port 1 and plug it into port 2 14 Repeat the fourth and fifth steps for port 2 Fig 3A 7 Softfire signal ERROR SUMMARY Errors during the RAM PORT and verif...

Page 46: ...n a particular order The Rwapout instruction means that you should replace the indicated components one at a time with known good components of the same type The unit should then be tested with the new known good components in place to see whether the Rwapout solved the problem being checked If the Rwapout did not fix the problem leave the new chip in and Rwapout the next Repeat this procedure for...

Page 47: ...here a 1 78975 MHz signal on pin 34 of U3 Is there a 1 78975 MHz signal on pin 37 of U2 Is there a 1 78975 MHz signal on pin 30 of U5 B3 Swapout U5 and or U3 Open between U5 pin 29 and U3 pin 35 Open between U2 pin 37and U3 pin 34 Repair or Replace Is there a 1 78975 MHz signal on pin 37 of U2 BX B2 F No No No No No Yes NOTE On PCB CA020108 chip designators have been changed from U to A Black Scre...

Page 48: ...nsistor Q1 Q2 Base 3 5V 3 5V Emitter 4 3V 4 3V Collector 1 2V 1 0V Replace Transistor s Are voltages correct Replace Y1 Does unit function Check for open shorted or wrong value component in clock circuit Repair or Replace Yes Yes Yes No No BX F No NOTE On PCB CA020108 chip designators have been changed from U to A ...

Page 49: ...f VR1 Defective VR1or output short to ground possible chip Is there approximately 0V on point 2 of the schematic Defective J1 or open between point 1 of VR2 point 2 of VR1 with cartridge in Defective 1 Q6 2 R57 3 R56 Repair No No Yes Yes F B1 NOTE On PCB CA020108 chip designators have been changed from U to A ...

Page 50: ... U2 Pin40 Open Pin 36 of U2 to Pin 40 of U5 Is problem repaired F B4 B3 No Yes No No Yes Yes Yes PCB Pin CA020108 CA018087 5V GND A1 U1 1 8 A2 U2 8 1 21 A3 U3 21 1 U4 20 10 A5 U5 27 3 A6 U6 16 8 A7 U7 17 1 A8 U8 24 12 A9 U9 16 8 A10 U10 16 8 A11 U11 16 8 A12 U12 16 8 A13 U13 16 8 A14 U14 14 7 U15 20 10 A16 U16 16 8 A17 U17 16 8 A18 U18 8 16 A19 U19 8 16 A20 U20 8 16 A21 U21 8 16 A22 U22 8 16 A23 U...

Page 51: ...apout 1 U14 2 U15 3 U16 4 U17 Swapout U18 U25 Is there a good display Open Trace RAM chip Pin 2 to U2 or Replace defective RAM If only one chip is missing signal replace that chip If not proceed Does Unit function Is there a 4V p p signal on Pin 6 of U28 Is there a 4V p p signal on Pin 4 of U18 U25 Swapout 1 U14 2 U28 or open Pin 4 of RAM chip s to Pin 8 of U14 B5 F Repair Defective 1 U28 2 L4 L6 ...

Page 52: ...CX5200 Field Service Manual 52 Black Screen Troubleshooting cont B5 Is there a 4V p p signal on Pin 15 of U18 U25 Swapout 1 U17 2 U14 or defective R133 C140 R68 C55 F Swapout U17 Yes No ...

Page 53: ...between 13V 0V when S2 Is pressed Press S2 so that Pin 13 is high D3 D1 Yes No No No No Yes D Defective 1 RF Cable 2 Switchbox 3 Battery Eliminator Defective 1 L13 2 RF Module 3 Open between Pin 2 RF Module VCC2 Repair Or Replace F D2 Yes U29 is chip designation on PCB CA018087 A26 is chip designation on PCB CA020108 NOTE If you are servicing a unit containing PCB CA020108 chip designators have be...

Page 54: ...r open trace to collector of Q8 Is there 0V on the collector of Q8 Is there 13V on the base and 14 V on the emitter of Q7 Defective Q7 D1 Yes Yes Defective Q8 or Q9 Repair Or Replace F No No NOTE If you are servicing a unit containing PCB CA020108 chip designators have been changed from U to A ...

Page 55: ...pin or defective S2 Is Pin 10 of U29 A26 at 0V Is there continuity between pin 9 12 of U29 A26 Replace U29 A26 Replace Q10 Repair trace Does unit work Open trace or defective resistor or capacity in circuitry Repair or Replace Repair F Yes Yes Yes No No No No Yes Yes NOTE If you are servicing a unit containing PCB CA020108 chip designators have been changed from U to A U29 is chip designation on P...

Page 56: ...r Replace F Yes No If Pin 3 VR2 short to ground Possible short in chips Remove chips one by one and turn on unit If modulation occurs bad chip has been located If chips are not shorted check for possible GAP or trace shorted on boards NOTE If you are servicing a unit containing PCB CA020108 chip designators have been changed from U to A Yes ...

Page 57: ...5V p p signal on Pin 4 of U1 Is there 5V p p signal on Pin 5 of U1 Is there 5V p p signal on Pin 25 of U5 Swapout 1 U5 2 U2 3 U3 Open between Pin 4 of U1 R22 Defective U1 or no power or ground to U1 Open between U5 Pin 25 and U1 Pin 5 Is R22 good Mistuned or defective RF module or L12 or open between R22 RF module Pin 4 Repair or Replace Repair No No No No No Yes Yes Yes Yes Yes ...

Page 58: ...s adjusted With Pin 17 of U5 adjusted to 6V is there 4V p p signal on pin 21 of U5 Is there a 2V p p signal between C11 R28 Yes Yes Yes Yes C1 Replace Y1 Defective 1 R8 2 CR2 3 CR3 Defective U5 or C11 Defective C11 or open C11 to U5 Pin 21 No No No No Repair or Replace F NOTE If you are servicing a unit containing PCB CA020108 chip designators have been changed from U to A ...

Page 59: ... R31 Mistuned RF Module or defective 1 R31 2 RF Module or open R31 to RF Module Pin 4 Repair Or Replace Yes Yes Yes F Defective R28 or open Trace R28 to Q3 Is the signal present at approximately 0V Defective R30 Defective C9 or open C9 to the collector of Q3 Yes Defective R29 NOTE If you are servicing a unit containing PCB CA020108 chip designators have been changed from U to A No No No No ...

Page 60: ... between R23 R24 or R25 and RF Module pin 4 Defective U1 or no 5V or ground to U1 Open between U1 output and that resistor Yes No No Yes Is there a 5V p p signal on the U2 pin Is there a 5V p p signal on the U1 input pin No No Yes Yes Open between U2 pin and U1 input Yes Is pullup resistor good Swapout 1 U5 2 U2 3 U3 No NOTE If you are servicing a unit containing PCB CA020108 chip designators have...

Page 61: ...mpo nents for correct value No Yes Open or shorted trace F X Repair NOTE If you are servicing a unit containing PCB CA020108 chip designators have been changed from U to A POT Line Error Code Pokey Adj Failure Port and Pin Pokey U7 Pin CAP 1 CAP 2 Resistor 22 HOR 1 1 10 14 C98 C106 R106 23 VERT 1 1 11 15 C97 C105 R110 24 HOR 2 2 10 12 C96 C104 R107 25 VERT 2 2 11 13 C95 C103 R111 26 HOR 3 3 10 10 ...

Page 62: ... Q11 Q14 and compare readings to the ones shown for the B condition in the chart below Does Pokey adjust pass Replace transistor Defective component in Pokey adjust circuitry Repair Check for opens shorts in circuitry repair No Yes Yes Yes No NOTE If you are servicing a unit containing PCB CA020108 chip designators have been changed from U to A Transistor Q11 Q12 Q13 Q14 Condition A B A B A B A B ...

Page 63: ...bottom fire button Does signal drop to approximately 0 0 7V Defective U5 Repair or Replace Defective controller Is trigger line shorted to 5V Defective 1 U5 2 U5 Socket 3 Cap on that line See chart below Go to controller section Page F NOTE If you are servicing a unit containing PCB CA020108 chip designators have been changed from U to A Port U5 Pin Cap 1 8 110 2 9 109 3 10 108 4 11 107 Yes Yes Ye...

Page 64: ...in 16 Repair open trace from U13 Pin 3 to U7 Pin 16 F Yes Yes Yes No No No Swapout and retest in the following order 1 U7 2 U3 3 U5 Are there 5V p p waveforms at U13 Pins 9 10 Repair broken traces from U5 to U13 Check waveform at U13 Pin see chart Is it now low Check for opens from Pin see chart to port plug and game controller Replace U13 Replace U5 Replace U13 Repair Yes Yes Yes No No NOTE If yo...

Page 65: ...y Adjust Test Are there 5V p p square waves on Pin 6 of U9 U12 Are there5V p p square waves on Pin 9 10 of U9 U12 Which port failed Yes No Replace U7 No F E4 E3 E2 E5 E1 NOTE If you are servicing a unit containing PCB CA020108 chip designators have been changed from U to A Yes Yes No Port 2 Port 4 Port 3 ...

Page 66: ...esistors on Pins 1 8 of Port 1 for proper value and operation Replace if defective Yes Yes No Is there 0V on Pin 6 of U9 U11 Defective U5 or open traces from U5 to U27 Repair or Replace Is the problem repaired Yes F No No Replace U27 NOTE If you are servicing a unit containing PCB CA020108 chip designators have been changed from U to A ...

Page 67: ...t E2 Swapout 1 U9 2 U12 Check capacitors and resistors on Pins 1 8 of Port 2 for proper value and operation Replace if defective Yes Does Port 2 pass F No No NOTE If you are servicing a unit containing PCB CA020108 chip designators have been changed from U to A ...

Page 68: ... E3 Swapout 1 U10 2 U11 Check capacitors and resistors on Pins 1 8 of Port 3 for proper value and operation Replace if defective Yes Does Port 3 pass F No No NOTE If you are servicing a unit containing PCB CA020108 chip designators have been changed from U to A ...

Page 69: ... E4 Swapout 1 U10 2 U12 Check capacitors and resistors on Pins 1 8 of Port 4 for proper value and operation Replace if defective Yes Does Port 4 pass F No No NOTE If you are servicing a unit containing PCB CA020108 chip designators have been changed from U to A ...

Page 70: ...ervice Manual 70 Keyboard Troubleshooting cont E4 Swapout 1 U27 2 U9 3 U11 Replace U5 Yes Does Port 4 pass F No NOTE If you are servicing a unit containing PCB CA020108 chip designators have been changed from U to A ...

Page 71: ... 1 2V p p signal on the side of C10 connected to Q4 Defective 1 C10 2 R33 Yes No F NOTE If you are servicing a unit containing PCB CA020108 chip designators have been changed from U to A Yes Yes Yes Yes No Yes Repair or Replace Swapout 1 U7 2 U2 Can L1 be adjusted to give a 4 5MHz reading Is there 5VDC on the collector of Q4 Adjust Replace 1 L1 2 L2 Replace 1 C13 2 C14 3 Q4a Does audio work No No ...

Page 72: ...ld replace the indicated components one at a time with known good components of the same type The unit should then be tested with the new known good components in place to see whether the Rwapout solved the problem being checked If the Rwapout did not fix the problem leave the new chip in and Rwapout the next Repeat this procedure for the rest of the components Once the unit functions properly rei...

Page 73: ... MHz signal on pin 29 of A5 Is there a 1 78975 MHz signal on pin 34 of A3 Is there a 1 78975 MHz signal on pin 37 of A2 Is there a 1 78975 MHz signal on pin 29 of A3 B3 Swapout A5 and or A3 Open between A5 pin 29 and A3 pin 35 Open between A2 pin 37and A3 pin 34 Repair or Replace Is there a 1 78975 MHz signal on pin 37 of A2 BX B2 F No No No No No Yes Yes Black Screen Troubleshooting Yes Yes Yes Y...

Page 74: ...ng voltages on the pins of the transistor Q1 Q2 Base 3 5V 3 5V Emitter 4 3V 4 3V Collector 1 2V 1 0V Replace Transistor s Are voltages correct Replace Y1 Does unit function Check for open shorted or wrong value component in clock circuit Repair or Replace Yes Yes Yes No No BX F No ...

Page 75: ...there approximately 9V on the input of VR1 Defective VR1 or output short to ground possible chip Is there approximately 9V on point CI1 of the schematic Defective J1 or open between point CI1 and point CI2 with cartridge in Defective 1 Q6 2 R57 Repair No No Yes Yes F B1 ...

Page 76: ... chip 5V or Ground Check for bad socket Defective A1 or other Reset circuitry connected to A2 Pin40 Open Pin 36 of A3 to Pin 40 of A2 Is problem repaired F B4 B3 No Yes No No Yes Yes Yes IC 5V Pin GND Pin A1 1 8 A2 8 1 21 A3 21 1 A5 27 3 A6 16 8 A7 17 1 A8 24 12 A9 16 8 A10 16 8 A11 16 8 A14 14 7 A15 14 7 A16 16 8 A17 16 8 A18 8 16 A19 8 16 A20 8 16 A21 8 16 A22 8 16 A23 8 16 A24 8 16 A25 8 16 A27...

Page 77: ...good display Swapout 1 A14 2 A15 3 A16 4 A17 Swapout A18 A25 Is there a good display Open Trace RAM chip Pin 2 to A2 or Replace defective RAM If only one chip is missing signal replace that chip If not proceed Does Unit function Is there a 4V p p signal on Pin 9 of A17 Is there a 4V p p signal on Pin 4 of A18 A25 Swapout 1 A14 2 A15 or open Pin 4 of RAM chip s to Pin 8 of A14 B5 F Repair Replace A...

Page 78: ...d Service Manual 78 Black Screen Troubleshooting cont B5 Is there a 4V p p signal on Pin 15 of A18 A25 Swapout 1 A17 2 A14 or defective R133 C140 R68 L3 C55 F Swapout A15 or replace defective C30 C33 L4 L6 Yes No ...

Page 79: ...e 5V on Pin 3 of the RF Module Is there 12V on input of VR2 Does Pin 13 of A26 change between 13V 0V when S2 Is pressed Press S2 so that Pin 13 of A26 is high D3 D1 Yes No No No No Yes D Defective 1 RF Cable 2 Switchbox 3 Battery Eliminator Defective 1 L13 2 RF Module 3 Open between Pin 2 RF Module VCC2 Repair Or Replace F D2 Yes No Yes Yes ...

Page 80: ...reen Troubleshooting cont Defective 1 Q7 2 R55 3 R58 or open trace to collector of Is there 0V on the collector of Q8 Is there 13V on the base and 14 V on the emitter of Q7 Defective Q7 D1 Yes Yes Defective Q8 or Q9 Repair Or Replace F No No ...

Page 81: ...is pressed and low when it is released Check condition of S2 C47 R61 Also verify 9V 15VDC at pin 14 of A26 Is Pin 10 of A26 at 0V Is there continuity between pin 9 12 of A26 Replace A26 Replace Q10 Repair trace Does unit work Open trace or defective resistor or capacity in circuitry Repair or Replace Repair as required F Yes Yes Yes No No No No Yes Yes ...

Page 82: ...put of VR2 Open Pin 3 VR2 to VCC2 5B or 5F Repair or Replace F Yes No If Pin 3 VR2 short to ground Possible short in chips Remove chips one by one and turn on unit If modulation occurs bad chip has been located If chips are not shorted check for possible capacitors or trace shorted on boards ...

Page 83: ... p p signal on Pin 4 of A1 Is there 5V p p signal on Pin 5 of A1 Is there 5V p p signal on Pin 25 of A5 Swapout 1 A5 2 A2 3 A3 Open between Pin 4 of A1 and R22 Defective A1 or no power or ground to A1 Open between A5 Pin 25 and A1 Pin 5 Is R22 good Mistuned or defective RF module or L12 or open between R22 RF module Pin 4 Repair or Replace Repair No No No No No Yes Yes Yes Yes Yes ...

Page 84: ... Does Pin 17 of A5 adjust between 0 and 6V when R8 is adjusted With Pin 17 of A5 adjusted to 6V is there 4V p p signal on pin 21 of A5 Is there a 2V p p signal between C11 R28 Yes Yes Yes Yes M Replace Y1 Defective 1 R8 2 CR2 3 CR3 Defective A5 or C11 Defective C11 or open C11 to U5 Pin 21 No No No No Repair or Replace F ...

Page 85: ...lector of Q3 Is there a 3V p p signal between C9 and R31 Mistuned RF Module or defective 1 R31 2 RF Module or open R31 to RF Module Pin 4 Repair or Replace Yes Yes Yes F Defective R28 or open Trace R28 to Q3 Is the signal present at approximately 0V Defective R30 Defective C9 or open C9 to the collector of Q3 Yes Defective R29 No No No No ...

Page 86: ...ignal Replace F Defective R23 R24 R25 or open between R23 R24 or R25 and RF Module pin 4 Defective A1 or no 5V or ground to U1 Open between A1 output and that resistor Yes No No Yes Is there a 5V p p signal on the A2 pin Is there a 5V p p signal on the A1 input pin No No Yes Yes Open between A1 pin 15 and A1 pin 40 Yes Is pullup resistor good Swapout 1 A5 2 A2 3 A3 No Line Resistor A1 Out A1 In Pu...

Page 87: ...gnals visible between C15 R41 Is there a 4 5MHz 1 2V p p signal on the side of C10 connected to Q4 Defective 1 C10 2 R33 Yes No F Yes Yes Yes Yes No Yes Repair or Replace Swapout 1 U7 2 U2 Can L1 be adjusted to give a 4 5MHz reading Is there 5VDC on the collector of Q4 Adjust Replace 1 L1 2 L2 Replace 1 C13 2 C14 3 Q4 4 CR8 5 CR7 Does audio work No No No No Defective C15 or open U7 Pin 37 C15 Open...

Page 88: ...roller Is pin still at 5V Push and hold bottom fire button Does signal drop to approximately 0 1V Defective A5 Repair or Replace Defective controller Is trigger line shorted to 5V Check R114 or R117 for open Defective 4 A5 5 A5 Socket 6 Cap on that line See chart below Go to controller section Page F Port A5 Pin Cap Res 1 8 C112 R114 2 9 C107 R117 Yes Yes Yes Yes No No No No ...

Page 89: ...10 With softfire button held down are there 5V waveforms at U7 Pin 16 Repair open trace from A9 Pin 3 to A7 Pin 16 F Yes Yes Yes No No No Swapout and retest in the following order 4 A7 5 A3 6 A5 Are there 5V p p waveforms at A9 Pins 9 10 Repair broken traces from A5 to Port 1 2 Check waveform at A9 A10 Pin see chart Is it now low Check for opens from Pin see chart to port plug and game controller ...

Page 90: ...ass Swapout A7 Yes Do POT Lines pass From Error Code on chart below determine which line is defective check compo nents for correct value No Yes Open or shorted trace F S Repair POT Line Error Code Pokey Adj Failure Port and Pin Pokey U7 Pin CAP 1 CAP 2 Resistor 22 HOR 1 1 10 14 C98 C106 R106 23 VERT 1 1 11 15 C97 C105 R110 24 HOR 2 2 10 12 C92 C100 R109 25 VERT 2 2 11 13 C91 C99 R113 No Yes No ...

Page 91: ...t in Port board loop back board Check the voltages on Q11 Q14 and compare readings to the ones shown for the B condition in the chart below Does Pokey adjust pass Replace transistor Defective component in Pokey adjust circuitry Repair Check for opens shorts in circuitry repair No Yes Yes Yes No Transistor Q11 Q12 Q13 Q14 Condition A B A B A B A B Emitter 13V 13V 3 2V 0V 0V 0V 3 2V 0V Base 12V 13V ...

Page 92: ...just Test Are there 5V p p square waves on Pin 6 of A9 and A10 Are there 5V p p square waves on Pin 9 10 of A11 A9 and A10 Repair open trace Yes No Replace A7 No F V U No Yes No Yes Check for 5V p p signals at pins 19 20 21 22 of A7 Yes Are there 5V p p square waves on Pin 12 of A5 Replace A5 Replace A27 No ...

Page 93: ...of A9 Swapout 1 A9 2 A11 Check capacitors and resistors on Pins 1 8 of Port 1 for proper value and operation Replace if defective Yes Yes No Is there 5VDC on Pins 4 5 14 of A27 Defective A5 or open traces from A5 to A27 Repair or Replace Is the problem repaired Yes F No No Replace A27 ...

Page 94: ... Field Service Manual 94 Keyboard Troubleshooting cont V Swapout 1 A10 2 A11 Check capacitors and resistors on Pins 1 8 of Port 2 for proper value and operation Replace if defective Yes Does Port 2 pass F No ...

Page 95: ... 57 COLOR FAILURES COLOR FAILURES COLOR FAILURES COLOR FAILURES No Color U5 Q3 C9 C11 Y1 58 Weak Color Q3 C11 C9 R29 R32 58 AUDIO FAILURES AUDIO FAILURES AUDIO FAILURES AUDIO FAILURES Audio Failures U7 Q4 C14 C13 L1 71 Only a Few Tones Fail U7 71 CONTROLLER FAILURES CONTROLLER FAILURES CONTROLLER FAILURES CONTROLLER FAILURES Joystick does not work PORT U5 U7 C91 106 R106 113 61 Keypad does not wor...

Page 96: ...LID COLORED SCR SOLID COLORED SCR SOLID COLORED SCREEN EEN EEN EEN Solid Colored Screen A7 A2 A3 A5 Y1 Q1 Q2 VR1 73 Vertically Lined Screen J1 A2 A3 A5 A7 or open or shorted data or address line 73 VIDEO FAILURES VIDEO FAILURES VIDEO FAILURES VIDEO FAILURES Snowy Screen VR2 A26 RF Module Jack Cable 79 Warped Picture RF Module A1 A5 A3 83 COLOR FAILURES COLOR FAILURES COLOR FAILURES COLOR FAILURES ...

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Atari CX 5200, Service Manual

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