Atari 2600 POP Kiosk Field Service Manual
Contents
1. Q mol Figure 3 3 Mask Placement The testing of the POP is in two parts Thedfirst part uses just the displays of the POP itself to determine if it is indeed defective If you determine that the unit is indeed defective you must then use the 2 6 Diagnostic cartridge to pinpoint the probable error Before you can use the 2 6 Diagnostic cartridge however you must modify the POP PCB Perform the following two instructions before trying to use the 2 6 Diagnostic cartridge L Remove the ROM in position 7 M6 2 Remove the two jumper wires at position F10 to the right of the RF jack 3 Press position 4 on device A3 to the ON position for infinite gameplay The 2 6 cartridge can now be called to the screen by you selecting game 7 Because of the physical absence of player option switches you must short certain lines together in order to get the proper diagnostic displayed on the television screer These lines are located at F10 Figure 3 4 illustrates which lines must be shorted ATARI VCS POP Field Service Manual 3 3 Changed per ECN 0007 11 19 82 Josey suey 122 35 swen 199 96 S 01 Md 4OTOD OBR ST Figure 3 4 F10 Switch Legend O00 0 WO HEIS dOd NA 13927 AYMoFIG Lysty Ol 4 3 4 ATARI VCS POP Field Service Manual Defective RAM Test Purpose To test the 6532 chip RAM I O for proper operation Format At power up the television displays solid diagonal of some type if t2. ATARI VCS POP Field Service Manual 4 5 COLOR BAR TEST Reconnect POP and initalize Are color bars present on screen Adjust R70 so color is aligned properly Is unit tunable to proper shades ATARI VCS POP Field Service Manual 4 6 GRAY BAR TEST Short out color black amp white switch Did screen pattern change when switch removed Color black amp white line is bad Is proper gray bar pattern present Is a partial segment missing or is any color present Swapout 1 EF9 TIA 2 LM9 MPU 3 19 RAM Proper gray bar pattern ATARI VCS POP Field Service Manual 4 7 AUDIO TEST PROCEDURE Short out the Right Diff switch PG Are the two patterns in Ex 3 7 alternating on Is there a clear tone the screen Use scape or frequency _ counter to measure frequency at emitter of Q Do tne patterns alternate with the tones A Swapout re both cag 1 E F9 TIA Are patterns now Tune Audio to 4 5 MHz and tones consistent 2 J9 MPU correct As in example by adjusting each cycie 3 L M9 RAM Yes Adjust to 06 MHz Look for stable fre quency Remove Jumper YCS will go through Can unit be adjusted one last cycle before U and is sound clear changing to color bar Pra test Go to Audio Troubleshooting Procedure ATARI VCS POP Field Service Manual 4 3 SNOWY SCREEN TROUBLESHOOTING PROCEDURES Defective YR1 or shor
3. ATARI VCS POP Field Service Manual 4 41 TIMER FAILURE Cont are there pulses on BS Pin 107 Replace B C3 Is there an open between B8 amp B C27 Troubleshoot for open between B C3 Pin 11 and D E7 Pin 9 During a game is B C3 Pin 11 low Traubleshoot for open on SYN pulse leading to E F9 Are there pulses on B C8 Pin 10 Repiace CA ATARI VCS POP Field Service Manual 4 42 Press amp hold fire button is there Gv on E F9 pin See Chart TRIGGER LINE TROUBLESHOOTING Yes Swapout 1 E F9 2 J9 3 L M9 Is there 5v on E F9 pin See chart Defective E F9 or open between E F9 amp J201 or defective panel Na gt E F9 Pin Left Trigger 35 Right Trigge 36 ATARI VCS POP Field Service Manual 4 43 Unplug control panei Is there 5v on E F9 pin See chart No elective 1 E F9 2 R33 or R94 3 92 or C93 or trigger line shorted to ground Repair or Replace Defective contro panel PADDLE LINE TROUBLESHOOTING se Because of the absence of 9 pin connectors the diagnostic cartridge cannot be used to troubleshoot the POP The steps to do so are l Ensure that the control panel is good by a Measuring the pot with an OHM meter it should read 0 with the pot in one direction and 1M with the pot in the other direction b Ensure the lines are complete by ohmin
4. Cont 4 32 x Game Does Not RESET on ATARI Logo 4 34 Xl Game Does Not RESET on ATARI Logo Cont 4 35 X2 Game Does Not RESET on ATARI Logo Cont 4m 36 Y Bad SYNC Troubleshooting 4 19 Z RESET Troubleshooting Cont 4 40 AA RESET Problem 4 37 AD RESET Troubleshooting Cont 4 38 ADI RESET Troubleshooting Cont 4 39 AE Timer Failure 4 41 AEI Timer Failure Cont 4 42 AE2 Timer Failure Cont 4 42 ATARI VCS POP Field Service Manual 4 2A Changed per ECN 0007 11 19 82 GAME ROM TEST Is Enter Game Can you adjust R70 Number in blue so Color is blue Cycle through all ROM cartridges Adjust R70 Do the select amp reset No buttons work Yes Do all ROMS come up Yes Is the audio unit No correct Yes Is the video correct ATARI VCS POP Field Service Manual 4 3 Changed per ECN 0007 11 19 82 GAME ROM TEST Cont Do the joysticks function properly Do the joystick fire buttons function Is video now correct properly Do the paddles function property Do the paddle buttons function properly ATARI VCS POP Field Service Manual 4 4 2 6 CARTRIDGE TEST Remove the two jumper wires in position F10 Remove ROM 7 amp insert 2 6 cart ridge in cartridge socket Select Game 7 Does color bars pattern come up on screen Does gray bars matrix or audio pattern appear Is screen either solidly colored or vertically lined
5. Replace ATARI VCS POF Field Service Manual tell COLOR TROUBLESHOTING Cont Defective 1 YI 2 Q9 YI frequency 3 5795 RF Frequency 61 23 a Can RF module be Zz 157 tuned properly Tune RF Replace RF module Replace RF cabie good Yes Replace RF module ATARI VCS POP Field Service Manual 4 12 GRAY BAR TROUBLESHOOTING Short color bw switch with appropriate item ls there a 43v p p signal on leads of R78 Yes R79 and R30 on the side of the TIA For the following steps the line you are to 100k at is the one that did not have the above signal Is there a 4 5v p p Y Open berween TIA signal on the TIA EF9 EF9 and summing Pin for that line see chart resistor see chart No Replace TIA EF 9 Pass Yes No No Same failure Check pullup resistors Pullups good see chart j i Line in question is a Pin Name ib AM dag ia skort d droner 5 L R75 R80 L2 R74 R79 ATARI VCS POP Field Service Manual GRAY BAR TROUBLESHOOTING Cont Swapout 1 TIA 2 MPU 3 RAM Same Problem Defective 1 R78 R79 or R80 2 RF module or shorted or open LM line ATARI VCS POP Field Service Manual 4 14 SOLID COLORED SCREEN TROUBLESHOOTING Is there a 1 19 MHz signal an RAM Pin 39 Change 1 YI 2 qe 3 Other clock components or open between asc cir cuit an
6. The flow chart leaves nothing to chance it tells you when to perform a specific test and when to replace components When the flowchart branches to R call ATARI Techline Specialist Inside California 800 672 1466 Outside California 800 538 1535 CAUTION Extreme care should be taken when handling the integrated circuit chips They are all very sensitive to static electricity and can easily be erased by careless handling Always keep the chips in their plastic carrier tubes or on conductive foam when not nandling them Make certain you are well grounded when handling the chips Atari strongly recommends that you wear a conductive grounding band which ties from your arm to ground when handling the chips The chips are also susceptible to damage from stress when being removed from or inserted into the sockets Always use chip puller when removing the chips Do not pry the chips out with a screwdriver or any other tool Failure to follow the above guidelines results in unusually high chip failure rates and extra expense ATARI VCS POP Field Service Manual 4 l POP DIAGOSTIC FLOWCHARTS Check for shorted diode CR16 CR 1Q9 Did customer complain of snowy screen Is are diode s shorted Replace Connect unit properly Any modulation on No screen Does any one of the No three display patterns appear Yes Swapout Do all display patterns 1 C6 IC appear within l minutes 2 MPU
7. at F Pin ll when game starts Is there a single low puise at D E8 Pin when 9 T game starts Is there a single low pulse at E3 Pin 9 when Troubleshoot open short betwen E8 Pin 8 amp F3 Pin 11 game starts Yes No I Replace F Repiace E8 Troubleshoat for open a between D ES Pin and E8 Pin 9 Is there single high pulse on Pin 10 on F when game starts ATARI VCS POP Field Service Manual 4 31 GAME WILL NOT RESET TROUBLESHOOTING Cont Troubleshoot open short between D8 Pin and F Pin 10 Is there a single high pulse on Pin 9 af D3 when game starts Troubleshoot open shart or wrong value Repair is Pin 8 of D8 low Is Pin 9 of C D high Is Pin 3 of C D8 low Replace C D8 Troubleshoot open short between C D8 Pin 3 and DBS Pin 8 Is there is a single low pulse on D8 Pin 10 at game start Replace D ATARI VCS POP Field Service Manual 4 32 GAME WILL NOT RESET TROUBLESHOOTING PROCEDURES Cont Replace E8 F Is there an open short between E3 Pin 9 amp D E8 Pin 8 Replace C D7 No Yes No i Is Pin 5 of C D7 Is there a shart open between D E3 Pin 13 low and C D Pin 6 Is there a pulse on D ES Pin 10 Is there a high on in D E8 Pin 13 Replace D E3 Is there a low on D E7 Pin 9 when game is selected if t
8. paddle game controllers and to keep track of all player missiles and collision registers The TIA outputs are processed by additional circuitry into a composite video sound and color signal which is routed to the RF module It also generates the Sync signal for the unit Color Circuit The master oscillator consists of a crystal two transistors and additional circuitry which oscillate at a frequency of 3 57 MHz plus or minus 004 ATARI VCS POP Field Service Manual 1 2 SUMMARY The POP is a microcomputer that enables the user ta select any of the ATARI ROM cartridges instaiied on the PCB and play it for a predetermined period of time Three chips on the mainboard allow for the interaction between the game and the player These chips are the microprocessor MPU the Random Access Memory Input Output RAM I O and the Television Interface Adaptor TIA ATARI VCS POP Field Service Manual 1 3 SECTION 3 TESTING AND TROUBLESHOOTING EQUIPMENT REQUIREMENTS You require the following six pieces of equipment before you can troubleshoot the ATARI VCS Point of Purchase Dispiay unit POP TEST 15MHz Oscilloscope Frequency Counter 2 6 Domestic Diagnostic Cartridge Signal Tracing Device Chip Color Television Set properly adjusted POP Field Service Manual Before you begin troubleshooting the POP you must make the following modifications 1 Le The POP Game ROMs must be modified according to POP ROM Mod
9. 012055 C012058 C012062 C014179 01 C014179 13 C014180 07 CO014180 07 C014181 01 C014181 02 C014181 03 C014340 C014341 C014342 C014353 C014361 C014384 C014386 07 C014386 08 C014386 09 C014715 C014799 C015752 C016010 C016045 C016145 C016150 C016449 017096 C017654 CA012174 POP PARTS LIST Continued Description Prog ROM 36 HAUNTED HOUSE CX2654 Prog ROM 39 YARS REVENGE CX2655 Prog ROM 37 MATH GRAND PRIX CX2658 Prog ROM 15 HANGMAN CX2662 Cap Ceramic Axial 22PF 50V Cap Ceramic Axial 20PF 50V Cap Ceramic Axial 470PF 50V Cap Ceramic Axial 0047uF 50V Cap Ceramic Axial 00luF 50V Cap Ceramic Axial OluF 25V Cap Ceramic Axial luF 25V IC 74LS62 IC 74LS00 IC 74L520 Cap Epoxy Dipped 068uF 25V IC 74L 42 Ferrite Bead IC Socket 24 pin IC Socket 28 pin IC Socket 40 pin Connector Power Jack Heatsink Inductor 1 8MH Crystal 3 579545 Mhz IC 74LS74 IC MPU 6507 2 Mhz IC RAM 6532A ry Prog ROM 3 ASTEROIDS CX2649 Ic 74L 504 Diode Zener i N4736A RF Module B Assy ATARI VCS POP Field Service Manual 7 4 Locator J2 M2 K2 M5 C65 C69 C92 93 ESD STATIC FIX C55 62 84 91 95 98 C63 75 78 79 96 C2 11 13 18 20 25 27 32 34 39 41 54 66 7 3 77 C7 M N7 FB1 4 C1 6 D1 6 E1 6 F 1 6 J1 6 K1 6 L 1 6 M1 6 L M9 E F9 J9 34 Ol 6 LI YI D E7 D E8 L M9 J9 F6 C D7 F8 ESD Static Fix POP PARTS LIS
10. 08 66 1 14P1T 72 1404C 72 1608C 72 1808C 75 018C 75 99514 75 99516 75 99518 78 06001 78 22119 78 24019 79 5903 C010444 C010816 C010821 C010823 COL L201 C011202A C011205 C911206 C011207 COLL212 C011218 C011221 Co11222 C011223 2011224 C011225 C011227 C011228 32011229 POP PARTS LIST Continued Jumper DIP Switch 4 position Screw Philips 4 40 X LG Screw Philips 6 32 X LG Screw Philips 8 32 X LG Washer Flat 8 Nut Washer Assy 4 40 Nut Washer Assy 6 32 Nut Washer Assy 8 32 Heatsink Cable Clamp Tie Wrap Connector Phono Jack IC TIA IC CD4050B Cap Poly 20PF 50V Inductor Variable 12 1 2 turns Prog ROM 11 COMBAT CX2601 Prog ROM 2 AIR SEA BATTLE CX2602 R Prog ROM 22 OUTLAW CX2605 Prog ROM 25 SLOT RACERS CX2606 Prog ROM 8 CANYON BOMBER CX2607 TM Prog ROM 27 STREET RACER CX2612 Prog ROM 29 3D TIC TAC TOE CX2618 Prog ROM 32 VIDEO OLYMPICS CX262 R Prog ROM 7 BREAKOUT CX2622 PROG ROM 16 HOMERUN CX2623 Prog ROM 5 BASKETBALL CX2624 Prog ROM 13 FOOTBALL CX2625 Prog ROM 17 H CANNONBALL CX2627 Prog ROM 6 BOWLING CX2628 Prog ROM 24 SKYDIVER CX2629 TM TM R TM TM ATARI VCS POP Field Service Manual 7 2 Locator A7 A8 VRI J6 E F9 J8 C68 71 F5 E6 L4 D3 G2 F3 K3 C2 M6 K6 K5 D4 L6 3 Assy Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main M
11. 12 high es Yes re there pulses on D E8 Pin 4 Yes Are there pulses on D E7 Pin 9 Yes Are there pulses on F7 Pins 1 6 7 9 amp 15 re there pulses or No F7 Pin 13 Yes Yes re there pulses on D8 Pin 5 ATARI VCS POP Field Service Manual Troubleshoot open short Replace F8 Troubleshoot open short Replace D E Troubleshoot open short between F7 Pin amp D E7 Pin 9 Repiace F7 Troubleshoot open between D Pin 5 amp F7 Pin 13 4 36 Repair GAME DOES NOT RESET ON ATARI LOGO Cont Set oscilloscope AC SMV SMSEC Are there pulses on F8 No Are there pulses on C3 Are there puises on C3 Pin 9 Pin 6 Pins 1 2 4 or 5 Yes Troubleshoot open Replace C3 Yes short between C8 Pin 6 amp F Pin 9 i Are pulses inverted on F Replace F3 Pin 87 j Are same pulse oresent on EZ Troubleshoot open short Pins I amp 27 Y Swapout Is here data signal Ss ss there data signal i 39 on E7 Pin 13 on L M9 Pin 18 2 LM9 3 EF9 Troubleshoot open short Replace E7 ATARI VCS POP Field Service Manual 4 35 No RESET TROUBLESHOOTING Cont Replace F8 i Swapout Is there a pulse on 1 EF9 L M9 Pin 1 2 LM9 3 39 Troubleshoot short open j ATARI VCS POP Field Service Manual 4 39 RESET TROUBLESHOOTING Cont Troubleshoot open Is there an open between D
12. 3 RAM 4 TIA Yes ATARI VCS POP Fieid Service Manual 4 2 INDEX OF FLOWCHARTS LETTER TITLE PAGE NUMBER A Single ROM Faulty 4 22 B Game ROM Test u3 Bl Game ROM Test Cont FG B2 Game ROM Test Cont 4 4 C Defective ROM Troubleshooting 4 21 D Snowy Screen Troubleshooting Procedures 4 9 DI Snowy Screen Troubleshooting Procedures 4 9 E Solid Colored Screen Troubleshooting 4 15 El Solid Colored Screen Troubleshooting Cont 4 16 F POP Diagnostic Flowcharts 4 2 G Color Troubleshooting 4 10 Gl Color Troubleshooting Cont 6 11 G2 Color Troubleshooting Cont 4 12 H Defective I O Line Troubleshooting 4 20 I Trigger Line Troubleshooting 4 43 J Paddle Line Troubleshooting 4 44 JJ Game Will Not RESET Troubleshooting Cont 4 33 K Gray Bar Troubleshooting 4 13 Kl Gray Bar Troubleshooting Cont 4 14 M 2 6 Cartridge Test 4 5 N Color Bar Test 4 6 O Defective Switch Troubleshooting 4 17 Ol Defective Switch Troubleshooting Cont 4 18 P Gray Bar Test 5 7 Q Audio Test Procedure 4 8 R ATARI Techline Specialist 4 1 S One Row One Section Faulty A Group of 4 Chips 4 23 T Single Row Faulty Gr up of 8 Chips 4 24 Tl Single Row Faulty Cont 4 25 U Single Column Faulty Column I As Example 4 26 Ul Single Column Faulty Cont 4 27 U2 Single Column Faulty Cont 4 28 V Entire ROM System Faulty 4 29 VI Entire ROM System Faulty Cont 4 30 W Game Will Not RESET Troubleshooting Procedures 4 31 Wi Game Will Not RESET Troubleshooting
13. 6 high Troubleshoot open short between A6 Pin 16 amp D6 Pins 20 21 Replace ROM D6 ATARI VCS POP Field Service Manual 4 22 ONE ROW ONE SECTION FAULTY A GROUP OF FOUR CHIPS i e ROW 0 SECTION X DEVICES C6 06 E6 amp F1 Are Pins amp i9 Troubleshoot for open on H low short Pin of M N7 to Pins I amp 19 of H6 Are date signals Troubleshoot for apen present on H6 short on data lines between H6 amp C6 Are there signals on Replace H DXO DX7 on H Are there data signals Troubleshoot data on Pins 15 17 on K3 lines H6 K8 for opens shorts ATARI VCS POP Field Service Manual 4 23 SINGLE ROW FAULTY A GROUP OF 8 CHIPS i e ROW 0 DEVICES C6 D E6 F6 J6 K6 L6 AND M6 Are CRII CR 12 and R51 the right value No Replace component Troubleshoot open F along 5 une Is Pin I of j_No Are Pinsh3 15 SWE y MIN low of M N7 low j mm Yes Yes e No n ji E Troubleshoot open om e als and Pins I amp 19 i i on B H amp N6 low Yes Do signals h Do AB ABIL AG AB8 ABI at MPU have 36 AB AB 7 H signals on them Yes Yes Troubleshoot aoen short ATARI VCS POP Field Service Manual 4 24 SINGLE ROW FAULTY Cont Are address signals at N output of A B6 Replace faulty chip amp N P7 Do COL 9 3 input aes Replace A6 ouputs on AG ATARI YCS POP Field Service Manua
14. ANEL 6 1 F PARTS LIST 7 1 8 SERVICE BULLETINS 8 1 ATARI VCS POP Field Service Manual iji Changed per ECN 0007 11 19 82 LIST OF ILLUSTRATIONS Figure Title Ka i Functional Block Diagram POP Static Modification Zener Diode Assembly Installation Mask Placement F10 Switch Legend Defective RAM I O Patterns Color Bar Screen Gray Bar Screen Audio Tone Screen PCB Location of A7 A8 and Channel Select NS BIE K A Ta Ta CO SI DUFF WN I jam Control Panel Schematic Harness Cable Schematic AA P ia rg f oO i 1 t IT ON ON n ES NN N ao V N rm INTRODUCTION The Point of Purchase POP Field Service Manual is a reference guide for you the service technician The information presented in this manual when used in conjunction with ATARI training enables you to repair and maintain the POP display This Field Service Manual is organized in eight sections Theory of Operation Overview of how the POP display works Schematics Electrical drawings and layouts for major components in a separate packet accompanying this manual Testing and Troubleshooting Overview of tests which assist in diagnosing malfunctions Diagnostic Flowcharts Detailed procedures for troubleshooting and repairing the POP display Symptom Checklist Failure information to assist the experienced technician arrive at a rapid diagnosis of problems Control Panel Schematics for troubleshooti
15. ATARI Ys POP FIELD SERVICE MANUAL ATARI believes that the information described in this manual is accurate and reliable and much care has been taken in its preparation However no responsibility financial or otherwise shall be accepted for any consequences arising out Gf 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 Manager of Technical Support Consumer Product Service ATARI Incorporated 845 Maude Avenue Sunnyvale CA 94086 ATARI VCS POP Field Service Manual TABLE OF CONTENTS Section Title Page INTRODUCTION v 1 THEORY OF OPERATION 1 1 Overview l 1 Game Console L 1 Mainboard 1 2 Summary 1 3 2 SCHEMATICS In packet accompanying this manual 3 TESTING AND TROUBLESHOOTING 3 1 Equipment Requirements 3 1 Test 3 1 Static Modifications 3 1 Modifications Before Using The 3 3 2 6 Diagnostic Cartridge Defective RAM Test 3 4 Color Bar Test 3 5 Gray Bar Test 3 6 Audio Tone Test 3 7 ZA DISASSEMBLY FOR ADJUSTMENTS 3A I Removing The Control Panel Accessing the PCB 3A 1 Changing Gameplay Time 3A 2 Setting Channel Position 3A 3 4 DIAGNOSTIC FLOWCHARTS Ye Index of Flowcharts 4 24 5 SYMPTOM CHECKLIST 5 1 Overview 5 1 Controller Failures 5 2 L gic Failures 5 2 Video Failures 52 Color Failures 5 3 Audio Failures 5 3 ROM Failures 5 3 6 CONTROL P
16. E7 Pin 5 and D8 Pin 6 Are there pulses on E7 Pins 9 amp 10 Is E7 Pin li o Low game on oPulse Osc on Are there pulses on E7 Pin 8 when Osc is on Is there a small pulse on base of Q7 with OSC on Troubleshoot open or wrong value for R64 R 66 re there large RESET pulses on Q7 collector Are same pulses or C D8 Pin 11 Troubleshoot short open Are pulses inverted on C D8 Pin 10 Is there a pulse low during game on F Pin 3 ATARI VCS POP Field Service Manual 4 38 RESET TROUBLESHOOTING Cont Swap L M9 E F9 39 Are there pulses on L M9 Pins i4 17 26 amp 277 Troubleshoot for open between C8 Pins I amp 4 and L M9 Is there signal on C D7 Pin 9 Is there an inverted signal on C D7 Pin 8 Replace C D7 Troubleshoot for open between C D7 Pin 8 and C8 Pin 2 Troubleshoot for open between C D8 Pin 3 and L M9 Is there signal on C D8 Pin 3 Replace C D8 Troubleshoot for open between C D8 Pin amp and C8 Pin 5 ATARI VCS POP Field Service Manual 4 40 TIMER FAILURE Timer starts when game starts Are B8 OL amp Q2 initialized and counting pulses When game is on is B8 Pin Li low Is there switch continuity on A8 Ace there TIMER signals between A8 and TIMER and D E7 Pin II and TIMER teolace D E7
17. Greer White Lei C NTROLLERS Risht T we o Q w ga 3 2 w 5 nm Continued n Figure 6 2 Figure 6 1 Control Panel Schematic ATARI VCS POP Field Service Manual 6 1 Changed per ECN 0007 11 19 82 ka ee sk T 1 i White Orange Strip Gray Cround I White Orange Strip i White Green Stripe l s Select Os I White Red Strip I OO t White Purple Stripe 10 s Select r O White Yellow Strip T G 1 White Blue Stripe i White Black Stripe Start 8 O Gray Ground Orange Continued from Figure 6 1 Yellow Purple U ono OD 2 nanu gp 3 15 i7 13 L Figure 6 2 Harness Cable Schematic ATARI VCS POP Field Service Manual 6 2 Assy Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Part No 037752 01 122012 103 128002 151 128002 470 136003 101 137149 001 137176 001 14 5102 14 5103 14 5153 14 5154 14 5183 14 5221 14 5273 14 5332 14 5391 14 5471 14 5472 14 5563 14 5821 14 5912 179048 002 179049 002 19 411504 20670 01 21 1014748 24 5002252 24 50047 5 31 LN100 31 1N5401 31 1N914 33 2N3906 34 2N 3563 34 2N3643 34 2N6044 37 4040 37 4584B 37 7406 37 74LS166 37 74L5273 37 74L5367 37 LM323K SECTIO
18. LM2 from the TIA chip to the RF module Format Short the color black and white switch with the proper tool Eight horizontal gray bars are displayed going from black at the top tc white at the bottom in even steps See Figure 3 7 The screen should be steady and unchanging The lines may have minor glitches on their edges A thin white line always appears just over the top black bar No color 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 60 seconds to ensure that there is no flashing of color or shifting of the gray bars Figure 3 7 Gray Bar Screen ATARI VCS POP Field Service Manual 3 7 Audio Tone Test Purpose To test the function of the audio tone generation ard modulation circuitry e Format Short the right difficulty switches This test displays two alternating patterns on the screen See Figure 3 8 while two alternating tones are heard The tones change in sync with the screen This test continues for one full cycle after the switch returned to the initial position Figure 3 8 Audio Tone Screen ATARI VCS POP Field Service Manual 3 8 SECTION 3A DISASSEMBLY FOR ADJUSTMENTS REMOVING THE CONTROL PANEL ACCESSING THE PCB A 1m O 0 a A O 2 Unlock the sliding doors Remove doors Slide doors to open position lift each separately and pull the bottom towar
19. M SYSTEM FAULTY No j Replace J8 Is there an output signal on J8 Yes Troubleshoot between H8 and J8 for open or short Is there a short open between H Pin 11 and C8 Pin 6 Yes Repair trace Is there a short open between H8 Pin and MPU j Repiace H8 ATARI VCS POP Field Service Manual 4 29 ENTIRE ROM SYSTEM FAULTY Cont Are input signals for MIN 7 Pins 13 15 low Troubleshoot f r open sh rt between H Pins 12 15 16 amp M N7 Pins 13 15 Are output signals for Troubleshoot for open A ey aer short between H8 Pins Pins 2 6 high 5 6 amp C7 Pins 14 15 Troubleshoot for open short between C amp C D7 Are output signals for C7 Pin 1 low Pins 2 4 high Troubleshoot for open Are input signals for short between C7 amp C D7 C D7 Pin I low Pins 3 11 amp 13 high re output signals for C D7 Pin 2 high Pins 4 10 amp 12 low ATARI YCS POP Field Service Manual 4 30 GAME WILL NOT RESET TROUBLESHOOTING PROCEDURES Is there a short open Replace J9 between D Pin l amp J9 Pin 24 Is there a single low pulse at D3 Pin 10 when game is selected Is there a single low pulse at E amp Pin when game stars Is there a single low pulse at E8 Pin 10 when game starts Is there a single low pulse
20. N 7 POP PARTS LIST Description PC Board POP Cap Elec 10000UF 16V Cap Mica 150PF 50V Cap Mica 47PF 100V Prog ROM 0 137001 001 IC 74LS11 IC 74C244 Resistor WW LK Resistor WW LOK Resistor 4W 15K Resistor WW 150K Resistor AW 18K Resistor 4 W 220 Ohm Resistor WW 27K Resistor WW 3 3K Resistor 4 W 390 Ohm Resistor 4 W 470 Ohm Resistor 4W 4 7K Resistor 4 W 56K Resistor 4W 820 Ohm Resistor HW 9 1K Square Terminal 2 position Mini Jumper 2 position Resistor Variable 500K Test Points Cap Mylar 47UF 100V Cap Elec 2 2UF 50V Cap Elec 4 7UF 50V Diode IN100 Diode IN 5401 Diode IN9L4 Transistor 2N3906 Transistor 2N3563 Transistor 2N3643 Transistor 2N6044 T0220 IC 40406 IC 45845 IC 7466 IC 74L5166 IC 74LS273 IC 74L5367 Regulator LM323K ATARI VCS POP Field Service Manual 7 1 Locator C74 C94 64 67 70 C6 E7 Al 6 B1 6 H1 6 K8 L8 N1 6 R1 16 25 34 43 51 53 64 66 71 72 82 35 R91 92 R79 81 36 95 R87 R83 R93 94 R68 80 89 R2 15 17 24 26 33 35 42 44 50 52 54 56 63 69 7 3 77 R88 R53 R67 90 R78 R96 R34 R70 C76 1 12 19 26 33 4u C72 97 CR13 CR16 19 CRI 12 14 15 20 Q9 Q3 Q7 Q1 6 B8 B C8 C D8 N P7 F7 H8 B7 VR Assy Main Main Main Main Main Main Main Main Main Main Mair Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Part No 52 0
21. Select 23 C90 POP Game Reset 18 C36 POP I s Select 19 C87 POP 10 s Select 22 C89 Close the switch Is v now present at the ram Pin for that switch Swapout 1 J9 2 LM 9 3 EF 9 Is switch connected to ground an one side Is there an open between A201 and that switch Does switch now work Replace switen Repair trace ATARI VCS POP Field Service Manual 4 17 DEFECTIVE SWITCH TROUBLESHOOTING Cont Is cap on that line shorted to ground Replace Cap Swapout 1 J9 2 LM 9 3 EF 9 Is there 5v on the RAM Pin for that switch see chart Open between RAM Pin and inoperative switch SWITCH J9 Pin CAB Right Diff 16 C34 Left Diff 17 C85 Color B amp W 21 C88 Game Reset 24 291 Game Select 23 C90 POP Game Reset 18 C86 POP I s Select 19 87 POP 10 s Select 22 cga ATARI VCS POP Field Service Manual 4 18 BAD SYNC TROUBLESHOOTING RF module tuned to 61 25 MHz Channel 3 Can RF module be ni nie Yine Repiace RF module Defective R8 or Yes bad EF9 3 5 5v p p signal on A201 side of R amp I Tune RF module Swapout 1 EF9 2 LM9 3 19 Good Video Detective R76 Repair ATARI VCS POP Field Service Manual 4 19 Changed per ECN 0007 11 19 82 DEFECTIVE I O LINE TROUBLESHOOTING Determine which line s to look at by consulting chart below Is there 5v on the Y J9 Pi
22. T Continued i OTHELLO is a Trademark of CBS Inc for its strategy disc game and equipment DEFENDER is a Trademark of Williams Electronics Inc 3 SUPERMAN is a Trademark of DC Comics Inc 1979 4 SPACE INVADERS is a Trademark of Taito America Corp 5 PAC MAN is a Trademark of Midway Mfg Co 6 BERZERK is a lrademark of Stern Electronics Inc ATARI VCS POF Field Service Manual 7 5 SECTION 8 SERVICE BULLETINS This section is to be used by you to file the three classifications of service bulletins that are periodically released by the Manager of Technical Support The following are brief descriptions of each classification FIELD CHANGE ORDER A Fieid Change Order describes hardware or software changes to ATARI Computer products and instructs how to implement these changes To indicate your required action a Field Change Order is issued in one of the following two categories MANDATORY This identifies a failure mode hat affects reliability and describes a procedure to correct the failure This procedure must be performed on all units serviced or repaired AS FAILS This identifies a failure mode that affects reliability and describes a procedure to correct the failure mode This procedure must be perfoi med or an As Fails basis UPGRADE BULLETIN An Upgrade Bulletin describes produc improvements or modification that the consumer may wish to purchase These bulletins allow you to modify the cu
23. ain Main Main Main Main Part No C011233 C011234 C011239 C012008 C012009 C012010 C012013 C012015 C012016 C012017 012030 C012031B C012032 C012035 C012036 C012037A C012038 C012045 C012046 C012048 C012050 012052 POP PARTS LIST Continued Description Prog ROM 20 NIGHT DRIVER CX2633 Prog ROM 14 GOLF CX2634 Prog ROM 21 OTHELLO CX2639 R Prog ROM 41 SUPER BREAK UT CX2608 2 Prog ROM 38 DEFENDER CX2609 TM Prog ROM 34 WAR LORDS CX2610 Prog ROM I ADVENTURE CX2613 Prog ROM 42 DEMON DIAMOND CX2615 Prog ROM 23 SOCCER CX2616 Prog ROM 4 BACKGAMMON CX2617 Prog ROM 10 CIRCUS ATARI CX2630 3 Prog ROM 28 SUPERMAN CX2631 ji Prog ROM 26 SPACE INVADERS CX2632 Prog ROM 13 MAZE CRAZE CX2635 Prog ROM 30 VIDEO CHECKERS CX2636 TM Prog ROM 12 DODGE EM CX2637 TM Prog ROM 19 MISSILE CMD CX2638 TM Prog ROM 31 VIDEO CHESS CX2645 5 Prog ROM 40 PAC MAN CX2646 Prog ROM 33 VIDEO PINBALL CX2648 6 Frog ROM 35 BERZERK CX2650 TM Prog ROM 9 CASINO CX 2652 TM R TM TM ATARI VCS POP Field Service Manual 7 3 Locator 34 L3 K4 DI L2 E2 D6 El M4 36 ES J3 E3 E4 L3 J3 F4 M3 Cl D2 EZ D5 Assy Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Vain Part No C012054 C
24. d TIA Pin ll Is there a 3 5795 MHz signal on Pin 11 of TIA Swapout Is there a 1 19 MHz 1 TIA signal on pin 4 of 2 MPU or TIA Pin 4 of TIA is shorted Is there a 1 19 MHz signal on MPU Pin 27 Open between Pin 4 of TIA and pin 27 of MPU Swapout Is there a 1 19 MHz 1 MPU signal on MPU pin 28 2 TIA 3 RAM or Pin 28 of MPU is shorted Open between TIA Pin 26 MPU Pin 28 and RAM Pin 39 Js 1 19 MHz Repair signal on TIA pin 26 Open between pin 39 of RAM and pin 28 of MPU ATARI VCS POP Field Service Manual g Changed per BEN 0007 LL 19 82 SOLID COLORED SCREEN TROUBLESHOOTING Cont Is there a 1 19 MHz signal on TIA Pin 26 Open between Pin 26 TIA and Pin 39 RAM Open on line to either 5 or ground or de fective MPU TIA or RAM Is there and ground on TIA MPU and RAM Are TIA MPU and RAM ready and reset lines good Open or shorted line or defective TIA RAM or MPU Swapout 1 MPU 2 RAM 3 TIA Does correc pattern appear ATARI VCS POP Field Service Manual 4 16 DEFECTIVE SWITCH TROUBLESHOOTING SWITCH J9 Pin CAP With inoperative switch Is switch Yes Right Diff 16 C34 in open position Is internally shorted Left Diff 17 C85 there 5v present at Color B amp W 21 C38 at the A202 side of it Game Reset 24 C9 Game
25. ds you Remove the VCS security bar from the top of the control panei Remove all plugs from the VCS Remove the VCS from the control panel Remove the wing nuts from the carriage bolts located at the sack of the control panel on the underside about five inches from each side sanel Remove the carriage bolts You may have to lift the control panel to relieve tension on the bolts Unplug the connector halfway between the black box and the control pane Remove the ten Phillips head screws holding the plexiglas cover on the control panel Remove the menu card and discard Put the new menu card in place Cover the card with the plexiglass and secure with the ten Phillips head screws removed in Step I Turn the control panel over Be careful not to damage the joysticks Snap the black box connection on the PCB cable together with the one on the control panel Do not force this connection If the connection cannot be easiiy made check to make certain that the pins and pin connectors are correctly aligned and try again Lift and replace the control panel Make certain that the PCB is in place and that all cabling is properly stored Insert carriage bolts which were removed in Step G Secure carriage bolts with wiring nuts Place dummy VCS in same location as the VCS removed in Step E Secure VCS with security bar removed in Step C Replace sliding doors Insert back door without the lock top
26. first and then gently push in the bottom of the door Use the same procedure with the front door ATARI VCS FOP Field Service Manual 3A 1 Changed per ECN 0007 11 19 82 SETTING CHANNEL POSITION The PCB is set tc operate on Channel 3 of your television If a local television station is interfering with the game signal on Channel 3 you can change the game s channel to Channel 2 If you wish to change channels read on if not please push the PCB back into place and reverse the procedures in the Removing the Control Pane Section page 3A 1 To change the channel setting you need to change the jumper that is on the PCB itself If you have not already cut the plastic tie that holds the PCB in the the metal box cut it from the outside of the box and carefully remove it Now pull the PCB towards you apout 5 inches The plugs are located behind the back right corner of the RF module silver color box Refer to Figure 3A 1 on the preceding page ATARI VCS POP Field Service Manual 3A 3 Changed per ECN 0007 11 19 82 SECTION 4 DIAGNOSTIC FLOWCHART The Diagnostic Flow Chart is intended to be easy to use and the primary aid when trouble shooting the POP Follow the prompts in the order presented When a question is asked follow the line from that box which best applies to the unit s situation When that line terminates with a letter inside a circle turn to that page locate the letter in another circle and continue the diagnosis
27. g hem out 2 Ensure that the pot line on the board between E F9 and J is complete bv ohming it out See chart 3 Swapout the component on that particular line See chart left to right Swapout Components E E9 Pin JL Pin l 2 Left Paddie 40 9 E F9 C33 Right Paddle 39 ja E F9 ce ATARI VCS POP Field Service Manual 4 44 SECTION 5 SYMPTOM CHECKLIST The Symptom Checklist s designed to assist the experienced technician arrive at a rapid diagnosis for POP problems The checklist is not intended to replace the Diagnostic Flowchart as the primary trouble shooting guide but rather to supplement the flowchait Symptoms have been divided into six general categories of failure Controller Logic Video Color Audio ROM Failures Each symptom is accompanied by some possible causes and the best point to enter the Diagnostic Flowchart to locate the problem ATARI VCS POP Field Service Manual 5 1 Symptom Trigger Line do not function Paddle Lines de not function I O Joystick Lines do not function or Paddle fire buttons do not work Solid Colored Screen Vertically Lined Screen Snowy Screen Weak Picture Wrong Gray Bars SYMPTOM CHECKLIST CONTROLLER FAILURES Possibje Cause E F9 C92 C93 Harness Control Panel E F9 C80 C33 Harness Control Panel 19 C55 C62 Harness Control Panel LOGIC FAILURES E F9 J9 L M9 Q9 Yl open or shorted address or data lines E F9 J9 L M9 open or
28. he RAM is defective Figure 3 5 illustrates some of the known examples of screens which indicate a defective RAM I O A STS N Figure 3 5 Defective RAM I G Patterns ATARI VCS POP Field Service Manual 3 5 Color Bar Test Purpose To test the color generating functions of the TIA chip and associated circuitry for proper operation a Format A screen of 15 horizontal color bars is displayed See Figure 3 6 The screen should be steady and unchanging A gray or blue horizontal reference line extends across the screen about four bars from the bottom This reference line is thinner than the bars around it R70 should be adjusted to the bars immediately above and below the reference line to within one shade of each other The bars should be goldenrod in color Proper operation of the unit is indicated by being able to make this adjustment and by consistent color within the entire span of each bar on the screen Minor glitches on the edges of the color bar are acceptable Leave this test on for at least 60 seconds in order to catch any intermittent problems such as a bar momentarily changing colors or blanking out NOTE Figure 3 6 is a black and white representation of a color television screen ANANN tinn nnns aN Figure 3 6 Color Bar Screen REFERENCE BAR SAME COLOR ATARI VCS POP Field Service Manual 3 6 Gray Bar Test Purpose To test the function of the luminenscence lines LMO LM and
29. here are pulses in but no pulses out replace C D8 Are there pulse input output on C087 Trouble shoot for open between C D7 Pin 5 D E7 Pin 9 Troublesnoot for open between C D Pin 6 and D E8 Pin 23 Repair Repair ATAPI YCS POP Field Service Manual 4 33 GAME DOES NOT RESET ON ATARI LOGO Troubleshoot R56 R61 amp R62 for short open Is there a low on Pins 3 5 of E7 when a button is pressed Replace D E Is there a pulse on E7 when any button is pressed Troubleshoot open between E7 Pin 6 D E7 Pin 10 Is there a pulse on D E7 Pin 10 Is Pin 9 on D E7 e Low at power up e High when either select button is Low when start is pressed Replace 7 If Pin 11 on D E7 TIMER is not low replace D E7 ATARI VCS POP Field Service Manual 4 34 Are there pulses on D Pin 67 Are there pulses on D8 Pin 4 Are there pulses on D8 Pin 3 Replace D8 RESET PROBLEM Replace D8 Troubleshoot open Replace ATARI YCS POP Field Service Manual 4 37 Are there pulses on D E7 Pins 5 amp 67 Are there pulses on D E Pin 2 Is there 5v on D E7 Pins I amp 4 and a SYN pulse on D E7 Pin 3 Replace D E7 Troubleshoot for apen between D E7 Pin 2 and F7 Pin 13 Troubleshoot open Replace GAME DOES NOT RESET O ATARI LOGO Cont No Is F Pin 13 low Y Is F Pin
30. ification page I part number FD100029 regarding placement and o replacement of Game ROMs This ensures that you are not repairing game ROM which is to be later removed Install the static modification per the following instructions Make certain that you have the following 1 Zener Diodes 1N3747 C017654 two each 2 Capacitors 0047uf C014180 08 two each 3 Masking compound B Attach the Zener Diode to the capacitor See Figure 3 1 Make certain that the polarity is correct C Make certain the holes into which the assembly built in Figure 3 1 Is to be inserted are clear of all solder D Insert and solder the two assemblies built in Figure 3 1 into the two locations indicated on the POP PCB See Figure 3 2 E Coat the areas shaded on the top of the PCB as illustrated in Figure 3 3 with masking compound ATARI VCS POP Field Service Manual 3 1 Tne POP PCB is now statically modified to Atari specifications 3a With the control panel of the POP off carefully clean and lubricate he metal fingers of each X Y joystick controller as if Wrap Lead I Turn amp Solder C014180 08 Cap C017654 Figure 3 1 POP Static Modification Zener Diode Harness Edge Connector HINO ANA AA Figure 3 2 Assembly Installation ATARI VCS POP Field Service Manual 3 2 ULL DA gjedde epoke ee pp i a ZA TEVAY aa Arme DE Eg z EL AA A MEE
31. l 4 25 SINGLE COLUMN FAULTY COLUMN ONE 1 IS USED AS THE EXAMPLE Is Pin 16 on A6 high Is Pin 4 on A6 high Are Pins 20 amp 21 on D6 high Replace 6 Troubleshoot for opens Are Pins 20 amp 21 on from Pin 16 on A6 K6 high Pins 20 amp 21 on affected chips Are jumpers properly Properly installed set jumpers Replace D6 amp K6 ATARI VCS POP Field Service Manual 4 26 SINGLE COLUMN FAULTY Cont Troubleshoot C D7 Pin 12 amp A6 Pin 4 for short Troubleshoot Pin 2 on C7 Pin 13 on C D7 for short Do Pins 13 14 amp 15 on C7 carry address B amp A Do Pins 5 amp 6 on H8 have the same signa 5 high amp 6 low Repair Does H8 ROMLATCH have input pulse ATARI VCS POP Field Service Manual 4 27 SINGLE COLUMN FAULTY Cont Does GOROM have input pulses when START is pressed re input signals on Pins 4 amp 7 of H high Replace H and low respectively Are Pins 2 amp 4 on J8 Check for open high amp low respectively Do DB amp DBL of 38 match Pins 2 amp 4 ATARI VCS POP Field Service Manual 4 28 Does 2600A portion function properly re signals present on 18 DB DB5 Yes Are data input signals on H8 Is output signal on H8 low No Is a ROMLATCH signal present on Pin gt of H ls a GOROM signal presen on Pin i of R8 Low when RESET is pressed Yes ENTIRE RO
32. n for that line Na Unhook POP panel from board Defective panel Yes that line is shorted Is there 5v on the J9 Pin for that line Replace J9 F Yes Is there 5v on the J9 pin for that line Either shorted or open trace on that line or shorted cap see chart ATARI VCS POP Field Service Manual 4 20 Paddle Righ Laf Close che circuit mave joystick No Is there Gv on that Pin Swapaut 1 39 2 LM9 3 EF9 Joystick Direction Left Up Left Down Left Left Left Right Right Up Right Down Right Left Right Right J9 Pin 12 13 14 15 12 13 14 15 Cap C58 C57 C56 C55 C62 C l c60 C39 DEFECTIVE ROM TROUBLESHOOTING Is only one ROM bad Is there a one row one section failure ex C6 D6 F6 and F1 4 chips Is there a single row 8 chip failure ex C6 D6 E6 F6 J6 K6 L6 M6 s there a single column failure 6 locati nsex Cl 6 s the entire ROM system faulty Does the game reset correctly Does the game time out correctly ATARI YCS POP Field Service Manual 4 21 SINGLE ROM FAULTY ei ROM 1 DEVICE D6 Insert the correct ROM Is the ROM correct Is a signal on Repair Put jumper on Pin 18 1s jumper in place connector Open trace Troubleshoot R54 for opens and shorts Does D6 Pin 24 have 5V Are Pins 20 amp 21 on Is A6 Pin 16 high D
33. nents e Power Supply The power supply is composed of a 5 volt regulator filter capacitors and the power ON OFF switch Unregulated DC is supplied to the logic portion of the PCB from the AC power adaptor A suppy of 5 is routed through a filter circuit to the RF modulator This reduces the amount of RF radiation generated by the game e RF Modulator The RF module converts the signal received from the Television Interface Adaptor to a frequency that a televison can receive and interpret A coaxial cable passes this signal from the RF module to the cable mounted to the back of the television Microprocessor Chip The 6507 Microprocessor MPU chip is an 8 bit microprocessor that is responsible for the coordination of all circuitry in the POP It controls and moniters the functions of the RAM and the TIA reads information from the ROMs and instructs the TIA in what to display e Random Access Memory Input Output Chip Temporary storage of data from the MPU is provided by the 6532 Random Access Memory Input Output RAM I O chip This chip scans the I O joystick lines for input It also keeps track of the internal timing of the chips for accurate video coordination Television Interface Adaptor Chip This ATARI proprietary chip generates audio and video signals which are required by the RF modulator The TIA also contains the analog to digital converter circuitry that allows the MPU to understand signals originating in the
34. ng failures with the control lines Parts List Detailed breakdown of ali parts used in the POP display Service Bulletins Section to be used to hold Field Change Orders Upgrade Bulletins and Tech Tips SECTION 1 THEORY OF OPERATION OVERVIEW The POP is a state of the art microcomputer It receives instructions for the operation of different games from individual Read Only Memory ROM game cartridges The POP interprets data from the game controllers and executes commands on the television screen Figure l 1 is a block diagram of the functional flow of the POP Select Switches Control Panel A ta D Convert Game Controller 2 a 6507 Microprocessor Temporary RAM Storage Video Converter ROM Select Circuitry Audio Generator RF Modulator Game ROMs Battery Eliminator AC Adaptor Figure 1 1 Fuctional Block Diagram GAME CONSOLE The POP board sets in a metal enclosure that shields the mainboard from radiating electronic noise which originates in the television set ATARI VCS POP Field Service Manual 1 1 MAINBOARD The mainboard is a Printed Circuit Board PCB which holds the power supply the RF modulator the microprocessor MPU chip a combination Random Access Memory Input Output RAM I O chip and a Television Interface Adaptor TIA chip The beard also includes numerous capacitors resistors transistors and other assorted electronic compo
35. shorted address or data lines VIDEO FAILURES RF module VR1 J4 CRI6 CR19 RF module RF cable E F9 R73 R75 ATARI VCS POP Field Service Manual 5 2 Flowchart Entry Point I Pg 4 43 J Pg 4 44 H Pg 4 20 E Pg 4 15 E Pg 4 15 SYMPTOM CHECKLIST CONT COLOR FAILURES Flowchart Symptom Possible Cause Entry Point No Color at all Yl E F9 G Pg 4 10 Only the reference R70 CrL4 CRIL5 G Pg 4 10 bar appears Color will not adjust R70 E F9 C63 G Pg 4 10 Weak color C64 C65 R77 G Pg 4 10 AUDIO FAILURES No Audio C68 C71 Q8 L2 Adjustment Q Pg 4 8 Weak Audio C68 C71 C66 Q Pg 4 8 ROM FAILURES Because of the compiexity of the ROM circuitry there is no symptom checklist for his failure Instead proceed to the flowchart on Page 4 3 ATARI VCS POP Field Service Manual 5 3 SECTION 6 CONTROL PANEL The Control Pane consists of a left and right joystick with fire buttons and a left and right paddle with fire buttons Figure 6 1 is a schematic of the control panel including the SELECT and START buttons Figure 6 2 illustrates the harness cable schematic To troubleshoot the POP Panel determine which line is bad and replace the suspect defective parts Ground Ground Black White Stripe White Brown Strip White Red Stripe Lett White Orange Stripe 8 Yeilow White Stripe Alue Joystick Purple White Stripe Joystick w White Blue Stripe G Furple
36. stomer s unit to add capabilities which may not have been available when the unit was originally manufactured TECH TIP A Tech Tip is a document of a generai naiure wi ich transmits routine service or repair information By communicating methods developed since you attended training classes Tech Tips aid to continuously improve repair skills and increase knowledge of ATAR Computer Products Other times Tech Tips alert you to units that have been modified and are now standard for ATARI Manufacturing but are different from many existing units and require different repai techniques ATARI VCS POP Field Service Manual 8 1
37. t output YRI to ground Is 5v present on output of VR 1 7 5 unreg on VRI input Replace RF nfodule or bad RF cable Is there 5v on Pin 4 RF module Open between J4 and input VR1 7 5 unreg on 342 Is FB4 Defective Replace FB4 5v shorted to ground No Swap L TIA 2 MPU 3 RAM Open between A203 output and RF module Pin 4 Any modulation Defective J4 Repair ATARI VCS POP Field Service Manual 4 9 COLOR TROUBLESHOOTING ls any color visable including reference bar Yes Is there a 2 5 to 3v p p signal on a 3 3 Yes voit level between C64 and R77 Yes Open between TIA Pin 9 and C64 is there a 4 5 5v p p signal on Pin 9 of TIA Is R72 good Is R71 goad Repiac Swapout 1 TIA 2 RAM 3 MPU ATARI VCS POP Field Service Manual 4 10 COLOR TROUBLESHOOTING Cont Defective 1 C63 2 TIA Is color constantly rolling cycling Does voltage vary between amp 6u on Pin 10 of TIA when R70 is rotated Is Yl frequency 3 5795 MHz No Swapout 1 TIA 2 MPU 3 RAM Turn R70 fuily clockwise Is there 6V on anode LYS Defective R or open of CR15 between CR2 R7 U2 No 5 5V on anode of No CRI Yes Defective CR14 lt _ lt 5 on cathode of Eris Defective CRI 5 Open between 5 amp CR 14 Replace Replace Y1 Repair or
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