Section 4 - Vector Overheads.pmd
Contents
1. 5 LLAN 11 TERMINATOR JP2 3 TV VIDEO LLAN IN J3 IN J5 6 MONITOR VIDEO 4 OUT J1 LLAN OUT J2 Cet 3 f CR J2 12 pth B2 Ut _ TV VIDEO a X 7 ta il B tx Out J4 Li um C6 s J3 1 CE u I 4 ce 15 cH pe D6 eT J4 J5 rm Ss Mus L7 D7 m C13 8 L9 ca us R4 m at POWER LED ee pe ois cte R6 R7 C17 RB 2 D11 ET D10 C19 C20 tt LANE E uel s Ur T us ADDRESS a R10 51 r m E R11 R12 c22 R13 R14 Het Cites L14 51 RIS x C26 EIE 4 C28 T RI7 un L fezelle uig E EH mE Lem 7 U13 U14 D12 1 POWER IN J6 T ES D13 R26 EXE yrs C83 J6 D14 c32 D15 Q1 R27 5 Fi R28 016 017 RS U15 018 c37 ee BE 007 i 1 9 Dec LED RELAYON LED 017 RELAY POWER 7 TV Only PCB The functions of the connector and components on the TV Only PCB are 1 Diagnostics LED D12 This LED flashes indicating the board is functioning Brunswick CRT Overheads 11 2 Lane Address S1 This bank of eight switches is used to assign unique lane ID to the monitor so that the scorer computer can turn it on or off through the LLAN cable For Vector scoring the Address is set to the odd la2. 2 3 2 3 4 12 VDC 5 120 VAC 120 VAC FROM VIDEO INTERFACE FROM TO VIDEO OR TV ONLY PCB 6 4 1 TRANSFORMER PROCESSOR Overhead Power Relay 1 POWER RELAY 2 120 VOLTS ALTERNATING CURRENT 3 120 VOLTS ALTERNATING CURRENT FROM VIDEO INTERFACE OR TV ONLY PCB FROM TRANSFORMER 4 120 VOLTS ALTERNATING CURRENT TO VIDEO PROCESSOR Brunswick CRT Overheads 25 Adjustments The adjustments for the Overhead are located on the Video Processor PCB or the Adjustment PCB These controls allow the technician to adjust pincushion focus brightness and image position AN WARNING The voltage surrounding the controls on the Video Processor PCB can be dangerous Always perform these adjustments using one hand Place the other hand behind your back or in your pocket Do not let your free hand rest on the metal chassis of scorer Focus This control is located on the Video Processor Module at the high voltage transformer To adjust the focus turn the control until the desired picture sharpness is obtained Refer to the figure titled Video Processor Focus Control 2 Q PINCUSHION ADJUSTMENTS S S Q ud Q FOCUS O O ADJUSTMENT OL Video Processor Focus Control 1 FOCUS ADJUSTMENT 2 PINCUSHION ADJUSTMENTS 26 Brunswick CRT Overheads Pincushion Lit NOTE The pin
3. a BLU BLU BLU TO J4 ON VIDEO 2 2 GRN 2 GRN GRN 6 5 INTERFACE PCB RED RED RED 2 OR TOJI x GRY 9 GND cry PB TO M NITOR ON TV ONLY PCB 4 4 4 4 VIDEO IN 5 5 S CSYNC vio Ly 3 ve CSYNC ve 6 6 5 2 2 Nc 1 1 Overhead Receiver to Monitor Cable Assembly Part No 57 300032 000 1 TO J4 ON VIDEO INTERFACE 2 TO MONITOR VIDEO IN PRINTED CIRCUIT BOARD OR TO J1 ON TV ONLY PRINTED CIRCUIT BOARD Mum RT 2 CHASSIS gt SHELL 6 GND 8 13 anc 912 5 7 15 4 NC N ___ 6 1 WHT BLK GND WHT BLK TO P1ON TO OVERHEAD MONITOR 1 8 ON LANE SERVER i BLK SEL 4 2 ONTO 6 L 13 m O O O O O O O OD WHT YEL GND WHT YEL 86956 ee gt a m gt 55552 m I WHT RED GND WHT RED 4 RED BLU 8 RED gt WHT BRN GND ie WHT BRN 10 I 5 2 BRN GRN gt d WHT ORN GND gt 2 ORN RED 5 Scorer Computer to Overhead Monitor Cable Part No 57 500052 000 1 TO OVERHEAD MONITOR 1 8 ON LANE SERVER 2 SHELL 3 DRAIN 4 NO CONNECTION 5 CHASSIS 8 TO P1 ON OVERHEAD MONITOR lt RED orn s WHT ORN 9 XX RED Xx wHT ORN lt 2 gt GRN NC 1 WHTIBRN X X orn bes BRN TO J5 OR J4 ON 4 gt lt 4 TV ONLY RED BLU WHT BRN 2 5 gt lt 5 2 VIDEO TO P1 OR P2 ON 6 5 NHTRED X BLU XX Nc 6 TV ONLY MONITOR BLK CSYNC S RED AC POWER PANEL 7 gt lt 7 8 gt WHT BLK IR CSYNC am
4. 4 2 1 LED D4 MONITOR Se zl ox Po Ke VIDEO OUT J4 z mE Bd 5 n dis m as N m 1 raz 4 JPRI eu 3 7 Go BE mE m LN MONITOR POWER SCOR er om fs w EN VIDEO IN J1 Jl JPR3 tee mr 1 3 ERG 1 mL m 52 rm li ica us 10 cu cm ca VIDEO SELECT aS Ute m Ls s gt 7 JPR3 Da m e s SYNC SELECT Ud D B D 02 B JPR1 qu s 1 U5 zs C35 p 8 uer 38 ee TV VIDEO IN J2 n 2 9 1 OWER TV VIDEO OUT J3 POWER LED D18 IN J6 Video Interface PCB Connections The functions of the components and connectors on the Interface PCB are 1 Power In J6 Connection to the Power Transformer 30 VAC enters the PCB at this connector 2 Power On LED D18 This LED lights when the Interface PCB has power 3 Monitor Power Relay J7 Connection to the coil of the monitor power relay 12 VDC is sent to the coil from this connector 4 Monitor Video Out J4 Output to the Video Processor PCB for the video that was selected and amplified by the interface board 5 Relay On LED D4 This LED lights when 12VDC is sent to the monitor relay 6 Scoresheet Video In J1 Connection for the video coming from the Scorer Computer 7 Sync Select JPR1 Jumper used to configure whether the Sync signal of the TV video or the scorer video is used to control the monitor relay
5. VOLTAGE SELECTOR PCB 6 TOP OF OVERHEAD 2 FLATHEAD SCREWDRIVER 1 REMOVE FUSEHOLDER FROM POWER RECEPTACLE Selecting Input Voltage Transformers 1 REMOVE FUSE HOLDER FROM POWER RECEPTACLE 4 OPENING IN HOLDER 2 FLATHEAD SCREW DRIVER 3 VOLTAGE SELECTOR PCB 5 FUSES 6 TOP OF OVERHEAD Brunswick CRT Overheads 11 A CAUTION 2 Place the winch assembly on top of the overhead support weldment and position it in the notches located on the flat cross brace Make sure the winch is positioned so the lowering mechanism is at the front of the overhead and the lowering strap is in front of the flat cross brace 12 Brunswick CRT Overheads 3 i NOTE Extend the winch strap to the approach and attach the winch strap to the U bolt located at the top of the monitor Refer the figure titled Attachment of the Winch Assembly to the Weldment and Monitor Place the crank handle or drill adapter on the winch and raise the overhead by turning the crank counterclockwise until front J bolts of the monitor can be attached to the weldment Attach the J bolts to the weldment Using a variable speed drill with the supplied attachment to lower the monitor will speed up the process Refer to Suggested Tools 3 Turn the crank clockwise to lower the monitor Remove the winch strap from the monitor Tilt the rear of the monitor upward and install the rear retaining
6. 4 With the insulated handle in your hand slide the tip of the screwdriver under the anode lead protective cup located on the top of the CRT 5 A slight pop may be heard when the module discharges Touch the metal connection under the cup until the popping quits AN WARNING The voltage on the anode can exceed 26 000 volts To ensure safety always perform the above procedure with one hand Place the other hand inside a pocket or behind your back DO NOT PLACE YOUR UNUSED HAND ON ANY METAL ATTACHED TO THE OVERHEAD Brunswick CRT Overheads 21 Video Output PCB The Video Output PCB receives the RGB Signal and grid voltage from the Video Processor Module and applies them to the CRT There are no adjustments on this PCB Refer to figure titled Video Output PCB 4 RGB INPUT Video Output PCB 1 CRT 2 VIDEO OUTPUT PCB 3 ANODE 4 RGB INPUT 5 TOTUBE 22 Brunswick CRT Overheads Power Transformer The power transformer adapts the incoming voltage to the proper level needed inside the overhead The transformer can be wired to accept 115 VAC or 230 VAC as an input The selection of the input voltage is accomplished by a voltage selector module located next to the power input receptacle Refer to the figure titled Power Transformer 2 PCB POWER 1 MAIN POWER 4 POWER TRANSFORMER 3 POWER RELAY Power Transformer 1 MAIN POWER
7. 3 video connectors while the TV Only monitor will have a total of 4 connectors Refer to the figure titled Top View Comparison of the Regular Monitor and the TV Only Monitor 11 10 4 TV ONLY REGULAR TV OUT P3 MONITOR MONITOR 3 TV IN P2 2 6 VIDEO IN P1 LAN OUT P4 000 000 000 5 LAN IN IN OUT P3 P4 s 8 0009 VIDEO OUT P2 0000 0000 DEO VIDEO 7 OUT VIDEO IN P1 b Eo 9 POWER IN 12 TRIPLE OVERHEAD Top View Comparison of the Regular Monitor and the TV Only Monitor 1 POWER IN 2 VIDEO IN P1 3 TVIN P2 4 TVOUT P3 5 LOCAL AREA NETWORK OUT P3 6 LOCAL AREA NETWORK OUT P4 7 VIDEO IN P1 8 VIDEO OUT P2 9 POWER IN 10 REGULAR MONITOR 11 TV ONLY MONITOR 12 TRIPLE OVERHEAD Brunswick CRT Overheads 5 Overhead Monitor Connector Functions 6 Brunswick CRT Overheads Regular Monitor Power In Receptacle for the main power to the overhead The input here can be 120VAC or 240VAC This is selected through a voltage selection and fuse assembly built into the receptacle Refer to Selecting the Input Voltage later in this section Video In P1 Input connection for the scorersheet video coming from the scorer computer TV In P2 Input connection for the global video signal originating at the Control Desk A V box This cable daisy chains to all
8. INPUT 2 PCB POWER 3 POWER RELAY 4 POWER TRANSFORMER The transformer secondary coils provide 115 VAC 15 VAC 30 VAC and other voltages needed by the PCBs in the overhead Refer to the figure titled 27 Monitor Main Power Transformer The connections to the power transformer are 1 Main Power Input Cable to the power input connection located at the top of the overhead The power transformer can accept 115 VAC or 230 VAC 2 PCB Power Cable used to power either the Video Interface PCB or the TV Only PCB The power transformer supplies 30 VAC to these PCBs 3 Power Relay Cable that attaches to the contacts of the monitor power relay 120 VAC Brunswick CRT Overheads 23 2 TO RELAY PIN 2 3 TO RELAY PIN 1 ORN WHT ORN ORN 1 TO J6 ON VIDEO INTERFACE PCB OR J7 ON TV ONLY PCB WHT BLU WHT BRN WHT BLK BLU BRN BLK 4 MAIN POWER IN Overhead Monitor Transformer Assembly 1 TO J6 ON VIDEO INTERFACE 2 TO RELAY PIN 2 3 RELAY PIN 1 PRINTED CIRCUIT BOARD 4 MAIN POWER IN 24 Brunswick CRT Overheads Power Relay The power relay is used to control the on or off operation of the monitor It does this by switching 120 VAC to the Video Processor Module The 12 VDC coil of the relay is controlled by the Video Interface PCB or the TV Only PCB Refer to the figure titled Overhead Power Relay 1
9. Set the jumper to short pins 1 and 2 8 TV Video In J2 Connection for the TV video signal originating at the control desk A V box 9 TV Video Out J3 Output connection that allows the TV video signal to continue to additional overhead monitors 10 Video Select JPR3 Jumper used to determine whether TV video can be displayed on the overhead Set this Jumper to short pins 1 and 2 to allow both scoresheet and TV video TV Only PCB The TV Only PCB replaces the Interface PCB when a monitor is used for TV Only display This board adapts the Global video signal so that it can be used by the monitor The board also turns the monitor on off Whenever an on or off instruction is sent through the lane s LLAN cable the PCB will energize or de energize the 12 VDC monitor power relay A lane ID setup switch allows the scorer computer to uniquely identify each TV Only monitor connected to the LLAN Refer to the figure titled TV Only PCB
10. overhead a AC power cable All monitor types b Video In P1 All monitortypes c TVIn P2 Regular monitor d TV Out P2 Regular monitor e Video Out P2 TV Only monitor f LLAN In P3 TV Only monitor g LLAN Out P4 TV Only monitor 8 Brunswick CRT Overheads 10 4 TV ONLY REGULAR TV OUT P3 MONITOR MONITOR 3 TV IN P2 2 6 VIDEO IN P1 LAN OUT P4 000 5 LAN IN N OUT 8 L VIDEO OUT P2 7 VIDEO IN P1 9 POWER IN 12 TRIPLE OVERHEAD Overheads Top View 1 POWER IN 2 VIDEO IN P1 3 TV IN P2 4 TVOUT P3 5 LOCAL AREA NETWORK OUT P3 6 LOCAL AREA NETWORK OUT P4 7 VIDEO IN P1 8 VIDEO OUT P2 9 POWER IN 10 REGULAR MONITOR 11 TV ONLY MONITOR 12 TRIPLE OVERHEAD 2 Place the winch assembly on top of the overhead support weldment and center it over the monitor to be removed A CAUTION Make sure that the winch is positioned so that the lowering mechanism is at the front of the overhead and it is positioned in the notches located on the flat cross brace 3 Attach the winch strap to the U bolt located at the top of the monitor Refer to the figure titled Attachment of the Winch Assembly to the Weldment and Monitor Brunswick CRT Overheads 4 OVERHEAD MONITOR 3 WINCH ASSEMBLY 6 ALLEN BOLT Attachment of t
11. 1 Adjustment PCB A circuit board located on the lower or back access panel that allows a technician to conveniently adjust the monitor brightness picture size and picture position 2 Power Input and Fuses Voltage receptacle where main power enters the overhead The input voltage is selected using a plug in voltage selector module Fuses in the module protect the incoming power Refer to Selecting Input Voltage 3 Power Relay The relay that causes the monitor to turn on or off This relay is controlled by the Receiver PCB or the TV Only PCB Brunswick CRT Overheads 13 14 Brunswick CRT Overheads 4 Power Transformer The device that adapts the incoming power 120 VAC or 240 VAC for use by the circuits inside the overhead 5 Video Input s Input for the RGBS video coming from the Scorer Computer 6 Video Output PCB A circuit board located in the back of the monitor and attached to the back of the picture tube This PCB is responsible for applying the video to the color guns located inside the picture tube 7 Video Processor PCB A circuit board located in the back of the monitor that adapts the video so that it can be properly displayed on the CRT The Video Processor PCB controls the coils attached to the CRT and sends the video to the Video Output PCB so it can be shown on the picture tube 8 Video Interface PCB A circuit board located inside regular monitors that selects the incoming scoresheet or TV vide
12. AC Refer to 7 Power In J6 Relay On LED D17 This LED lights when 12VDC is sent to the monitor relay Power Relay J7 Connection to the coil of the power relay in the monitor 12 VDC is sent to the coil from this connector The board controls monitor on off from this connection TV Video Input J5 Connection for the TV video signal originating at the control desk A V box TV Video Output J6 Output connection that allows the TV video signal to continue to additional overhead monitors Brunswick CRT Overheads 19 20 Brunswick CRT Overheads Video Processor PCB The Video Processor PCB handles all sync and color signals for the CRT It contains circuitry such as vertical and horizontal oscillators to control how the picture is written to the screen and color circuits that automatically control the red green and blue video signal applied to the picture tube The only adjustments necessary to the board are focus and pincushion The remaining adjustments are located on the lower access panel Refer to the figure titled Video Processor PCB for Overhead Monitors 1 5 ADJUSTMENT POWER IN PCB 4 O PINCUSHION SL ADJUSTMENTS O No 0 O ADJUSTMENT Q LO yO 6 VIDEO INPUT L 34 7 2 VIDEO OUTPUT DEFLECTION COILS Video Processor PCB for Overhead Monito
13. Contents Glossary of Terms cossiicssissscssesonssoensdsecencsvesenssetecteeseesinensevocennsoenssaraeses 3 ODE A a 4 Overhead Monitor Connector Functions 6 Regular MONOT k u S R Sa aiunt dua 6 TV Only ie 6 Cabinet ACCESS sis scsssscasecsessessacensvsiosseea sossbsnseasssansedessassharsecsseatsvensaas s 7 Overhead Replacement 8 Lowerne the NMODIOE e uuu a tuna u E enfe Den 8 VORNE nennen 8 S S86S ed Ol MM 8 Raisins the Rene di iussu Ee Rm efe uar 11 Tools NECE nee 11 Suggested TOOLS c 11 Overhead mente 13 Selecting the Input Voltage occ sedie ee 14 Video Interface POB een 16 TV Oly qc 17 Video Processor PCB 20 Discharge Procedure una 21 VIdeo O ntDput PCB een 22 Power Iransformet Donc EA 23 Power Relay 25 AdJ St N6nS 26 FOCUS mr E 26 Pincushion eS 27 Screen Size Adjustments 27 na ae 28 2 Adjusinent ne ee 28 DENE ee 29 ME E NETUS 20 E 29 Cable e 30 Brunswick CRT Overheads Intentionally Blank Page 2 Brunswick CRT Overheads Glossary of Terms To better understand the information presented in this section you should b
14. O VIOLET GRY GREY WHT WHITE 32 Brunswick CRT Overheads 1 ORN 2 RED ri mC 2 TO RELAY PIN 2 3 TO RELAY PIN 1 TO J6 ON VIDEO BS SEN INTERFACE PCB _ V WHTIBLU OR J7 ON p RZ na lt 2 4 TV ONLY PCB o lt 4 MAIN POWER 5 IN Tia BLK 26 Overhead Monitor Transformer Assembly Part 57 300365 000 1 TO J6 ON VIDEO INTERFACE PRINTED TO RELAY PIN 2 3 TO RELAY PIN 1 CIRCUIT BOARD OR J7 ON TV ONLY PRINTED CIRCUIT BOARD 4 MAIN POWER IN Zu WHITE ORANGE ORANGE m lt 2 a WHITE ORANGE gt 1 2 gt lt a on TO J1 ON gt _ WHITE BROWN X 5 OVERHEAD MONITOR OVERHEAD al WHITE BROWN 8 POWER PANEL VIDEO co PCB S 8 RED OR lS ORICON WHITEIRED 3 WHITE RED PIOR PEON e 2 N I TV ONLY MONITOR TV ONLY NC VIDEO RECEIVER PCB 7 gt ze on Dun gt DRAIN 5 8 WHITE BLACK gt DRAIN m I 12 AC Power Panel to Video Interface PCB Scorer Video Part No 57 301029 000 1 TO J1 ON OVERHEAD VIDEO RECEIVER TO P1 ON OVERHEAD MONITOR AC POWER PRINTED CIRCUIT BOARD OR J5 ON TV ONLY PANEL OR TV ONLY AC POWER PANEL PRINTED CIRCUIT BOARD 4 MAIN POWER IN ORANGE WHITE ORANGE RED 3 ORANGE RED WHITE ORANGE GND 1 B
15. R 3 VOLTAGE SELECTOR 6 TOP OF OVERHEAD FLATHEAD N SCREWDRIVER 1 REMOVE FUSEHOLDER FROM POWER RECEPTACLE Selecting Input Voltage for the Transformer 1 REMOVE FUSE HO RECEPTACLE 4 OPENING IN HOLD LDER FROM POWER 2 FLAT HEAD SCREWDRIVER 3 VOLTAGE SELECTOR PRINTED CIRCUIT BOARD ER 5 FUSES 6 TOP OF OVERHEAD Brunswick CRT Overheads 16 Brunswick CRT Overheads Video Interface PCB The Video Interface PCB is used in the regular overhead monitors A signal from the Scorer computer allows the board to select the incoming scoresheet or TV video After the video has been selected the PCB amplifies it so that the Video Processor PCB inside the overhead can use it The PCB also energizes the monitor s power relay with 12VDC when it senses the presence of the sync portion of the video signal u _ m BELT ON RI em DA
16. ROWN GRN WHITE BROWN lt GRN WHITE BROWN GND noj 56 O ii 6 RED BLU RED AC POWER PANEL 6 Oe E WHITE RED GND 8 WHITE RED 5 BLU VIDEO INTERFACE PCB 8 a9 Ne 9 WHITE YELLOW GND YELLOW x ig 7 BLACK TV SEL 15 WHITE YELLOW CSYNC F WHITE BLACK GND DRAIN SHIELD In WHITE BLACK Es TV SEL 49 I 15 nc AC Power Panel to Video Interface PCB Scorer Video Part No 57 301029 000 1 4 TO J1 ON VIDEO INTERFACE PRINTED CIRCUIT BOARD MAIN POWER IN TO P1 ON AC POWER PANEL BRN BROWN BLK BLACK RED RED ORN ORANGE YEL YELLOW GRN GROUND BLU BLUE VIO VIOLET GRY GREY WHT WHITE Brunswick CRT Overheads 33 Intentionally Blank Page 34 Brunswick CRT Overheads See file Monitor Schematics pdf for this page Brunswick CRT Overheads 35 Back of 11 x 17 Page 36 Brunswick CRT Overheads See file Monitor Schematics pdffor this page Brunswick CRT Overheads 31 Back of 11 x 17 Page 38 Brunswick CRT Overheads
17. cushion adjustment is performed at the factory and should not need readjusting If problems occur after tube replacement or after the Video Processor Module is replaced the screen can be adjusted in the following way The pincushion controls are located on the Video Processor PCB The controls allow a technician to eliminate unwanted curvature in the perimeter of the video To adjust simply turn the control in the desired direction until unwanted distortion is eliminated Screen Size Adjustments The following controls allow the technician to adjust the image position on a CRT controls are located on the Adjustment PCB mounted on the lower access panel H Pos Turn this adjustment to center the video horizontally side to side This control is commonly referred to as horizontal centering H Size Turn this adjustment to increase or decrease the picture horizontally side to side This control is commonly referred to as horizontal width V Ras Pos Turn this adjustment to center the picture vertically top to bottom This control is commonly referred to as vertical centering V Size Turn this control to increase or decrease the picture vertically top to bottom This control is commonly referred to as vertical width o 5 M GAIN 1 H POS H POS Oi m H SIZE 2 WEAS HOS iO 3 V RAS POS V SIZE M GAIN v size 2 H SIZE Adjustment PCB Controls Bruns
18. etter familiarize yourself with these terms Brunswick Monitor A monitor that is used to display the scoresheet video The overhead monitors can also display VCR video if desired This monitor is sometimes referred to as the Brunswick monitor Deflection Coil An electrical coil which directs the electrons generated inside a CRT to a particular location on the screen Global Video The VCR video from the Audio video Unit located at the control desk It is called global video because it routed to and can be displayed on any overhead monitor LLAN Local Local Area Network A term used to describe the communication used by a Scorer Computer to communicate to circuits boards It is referred to as a local LAN because it is exclusive to a lane pair Pincushion A distortion of the CRT screen that causes the sides or top and bottom of picture to bend toward the center of the screen RGBS Red Green Blue Sync A format of video describing the way in which the video is sent over the cable TV Only Monitor A monitor that is used to display only the VCR video This monitor cannot display bowler s scoresheet TV Only PCB A circuit board located inside the TV Only monitor that adapts the TV VCR video so that the Video Processor can use it This PCB also determines when to turn the monitor on or off Video Interface PCB A circuit board located inside regular monitors that selects the incoming scoresheet or TV video and adapts it s
19. h a vacuum and or soft cloth Quarterly Adjust Displays Adjust the monitors to obtain a bright clear and centered image Refer to Adjustments in this section for the adjustment procedures Brunswick CRT Overheads 29 Cable Diagrams Adjustment PCB Part 57 215806 000 1 POSITION 3 wur o f NC TO CONNECTION J45 TREY BLK es ON CERONIX PCB RELAY gt D es 2 POSITION 4 Color Overhead Monitor Power Cable Part No 57 215809 000 1 POSITION 3 2 POSITION 4 3 TO POWER RELAY 4 TO CONNECTION J45 ON BRUNSWICK PCB 1 TO J7 ON 2 VIDEO INTERFACE POSITION 5 PCB NNi Wi did ON POSITION 6 Overhead Monitor Power Control Cable Part No 57 300030 000 1 TO J7 ON VIDEO INTERFACE PCB 2 POSITION 5 3 POSITION 6 OR TV ONLY PCB 4 RELAY BRN BROWN BLK BLACK RED RED ORN ORANGE YEL YELLOW GRN GROUND BLU BLUE VIO VIOLET GRY GREY WHT WHITE 30 Brunswick CRT Overheads
20. hardware Connect the following cables from the overhead a AC power cable All monitor types b Video In P1 All monitor types c TV P2 Regular monitor d TV Out P2 Regular monitor e Video Out P2 TV Only monitor f LLAN In P3 TV Only monitor g LLAN Out P4 TV Only monitor Overhead Electronics The circuit boards for an overhead monitor are located behind the picture tube in the back of the cabinet The boards are accessed by unlatching a rear access panel Refer to Cabinet Access and the figure titled Removal of the Circuit Board Access Panel The components located behind the picture tube include a Video Processor PCB a Video Output PCB a Power Transformer a Power Relay and a Video Interface PCB or the TV Only PCB Mounted on the access door or to the top of the chassis is a five control Adjustment PCB Refer to the figure titled Circuit Board Locations 27 5 6 VIDEO INPUT S VIDEO OUTPUT 2 POWER INPUT AND FUSES 8 VIDEO INTERFACE PCB OR TV ONLY PCB 2 POWER INPUT AND FUSES 3 POWER RELAY 4 POWER J lt 1 N ADJUSTMENT PCB 3 POWER RELAY 4 POWER TRANSFORMER 8 VIDEO INTERFACE PCB 7 A VIDEO PROCESSOR ORSIMONECPOB PCB 6 VIDEO OUTPUT PCB 7 VIDEO PROCESSOR PCB Circuit Board Locations The function of the components that may be located inside the back of the overhead are
21. he Winch Assembly to the Weldment and Monitor 1 WINCH STRAP 2 U BOLT 4 OVERHEAD MONITOR 5 NOTCHES 3 WINCH ASSEMBLY 6 ALLENBOLT 4 Remove the hardware holding the back of the monitor to the support weldment 5 Place the crank handle or drill adapter on the winch and raise the overhead by turning the crank counterclockwise until the weight of the monitor is off of the support Disconnect the J bolts from the weldment 6 Turn the crank clockwise to lower the monitor Using a variable speed drill with the supplied attachment to lower the monitor will speed up the process 7 Remove the winch strap from the monitor 10 Brunswick CRT Overheads Raising the Monitor Tools Needed Winch with Crank Handle Phillips Head Screwdriver Suggested Tools 3 8 Variable Speed Heavy Duty Drill for use with adapter attachment e Extension Cord for Drill Should it become necessary to replace a complete overhead unit or raise a monitor perform the following steps 1 Check the fuse assembly located in the power receptacle to make sure that it is set to the proper voltage rating Also check the fuses inside the assembly to make sure that they are set to the correct ratings Refer to the figure titled Selecting Input Voltage for transformers Input Voltage Fuse Ratings Slo Blow 110 120 VAC 2 AMP 27 3 AMP 36 220 240 VAC 1 AMP 27 1 6 AMP 36 4 OPENING IN HOLDER
22. ne number of the lane pair it is associated with SW 5 SW 6 SW 7 Value 16 Value 32 Value 64 18 Brunswick CRT Overheads 3 4 5 6 7 8 9 10 11 12 Local LAN In J3 Connection for the communication cable LLAN coming from the Scorer Computer This signal allows the overhead to turn on off Local LAN Out J2 Connection to continue the communication cable LLAN to additional monitors if needed If the signal does not continue to additional TV only monitors the signal is terminated Refer to 5 LAN Terminator JP2 LAN Terminator JP2 Jumper used to terminate the LLAN cable if it does not continue to additional monitors Reference 3 Local LAN In J3 To terminate the signal install a jumper on pins 2 and 3 To continue the signal jumper pins and 2 Installation Jumper Position Set to terminate if the signal does not T 21 U Pins 2 and 3 continue from J2 Set to un terminate if the LLAN signal U Pins 2 and 3 continues from J2 Refer to 4 Local LAN Out Monitor Video Out J1 Output to the Video Processor PCB for the video Power In J6 Connection to the Power Transformer 30VAC enters the PCB at this connector Power LED D 11 This light is on whenever the PCB is powered by 36 V
23. o and adapts it so that the Video Processor PCB can use it The PCB also determines when to turn the monitor on or off In TV Only monitors this PCB is replaced with a TV Only PCB TV Only PCB A circuit board located inside the TV Only monitor that adapts the TV VCR video so that the Video Processor can use it This PCB also determines when to turn the monitor on or off In regular monitors this PCB is replaced with a Video Interface PCB As stated at the beginning of this section it is important to determine the type of overhead being serviced The regular overhead monitor and the TV Only monitor contain many of the same circuit boards but are not exactly the same Refer to the figure titled Circuit Boards Location Selecting the Input Voltage To select the input voltage for the Power Transformer do the following 1 Disconnect the power cord from the Overhead 2 Using a flat head screwdriver remove the fuse holder from the power receptacle 3 Remove the Voltage Selector PCB from the holder assembly 4 Insert the Voltage Selector PCB so the desired voltage rating can be seen through the opening in the holder Refer to the figure titled Selecting Input Voltage for the Transformer 5 Check the ratings of the fuses located in the fuse holder to verify that they are correct Input Voltage Fuse Ratings Slo Blow 110 120 VAC 2 AMP 27 3 AMP 36 220 240 VAC 1 AMP 27 1 6 AMP 36 4 OPENING IN HOLDE
24. o that the Video Processor PCB can use it The PCB also determines when to turn the monitor on or off Video Processor PCB A circuit board located in the back of the monitor that adapts the video so it can be displayed properly on the CRT The Video Processor controls the coils attached to the CRT and sends the video to the Video Output PCB so it can be shown on the picture tube Also referred to as the Brunswick PCB Video Output PCB A circuit board located in the back of the monitor and attached to the back of the picture tube This PCB is responsible for applying the video to the color guns located inside the picture tube Brunswick CRT Overheads 3 Overview The Brunswick monitors are single lane units that can be arranged individually in pairs or as a triple configuration that includes a TV Only monitor Refer to the figure titled Brunswick Overhead Configurations 1 TV ONLY 1 TV ONLY Brunswick Overhead Configurations 4 Brunswick CRT Overheads Two types of monitors are available a regular monitor that is capable of showing both a scoresheet and a VCR TV picture and a TV Only monitor that can display only the VCR TV picture When working on the overheads it is important to identify the type of monitor because each contains a unique circuit board and is wired differently An easy way to determine the type of overhead is to look at the connections at the top of the unit The regular monitor will have
25. p WHT RED 8 o gt DRAIN SHIELD NC B BLK a0 9 wHT BLK DRAIN 1 AC Power Panel to TV Only PCB Video Cable Part No 57 300138 000 1 TO J5 OR J4 ON TV ONLY VIDEO 2 TO P1 OR P2 ON TV ONLY MONITOR CABLE PART NO 57 300138 000 AC POWER PANEL BRN BROWN BLK BLACK RED RED ORN ORANGE YEL YELLOW GRN GROUND BLU BLUE VIO VIOLET GRY GREY WHT WHITE Brunswick CRT Overheads 31 1 TO P3 OR P4 2 TO J2 OR J3 on TV Only PCB AT TOP OF TVO MONITOR 57 300216 000 Internal LLAN Cable TVO Monitor Part Nos 57 300216 000 1 TO P3 OR P4 AT TOP OF TVO MONITOR 2 TO J2 OR J3 ON TV ONLY PCB 2 3 AC RECEPTACLE BACK VIEW AC LINE FUSED e BLACK BLUE 4 TO 6 POSITION CONNECTOR ON WHITE BLACK TRANSFORMER WHITE 1 AC NEUTRAL FUSED ae GREEN W YELLOW O O 6 5 TO GROUNDINGSTUBON TO GROUNDING STUD ON PCB MOUNTING PANEL MONITOR FRAME WELDMENT Overhead Monitor AC Power Receptacle Part Nos 57 300366 000 57 301032 000 1 ALTERNATING CURRENT NEUTRAL FUSED 2 ALTERNATING CURRENT RECEPTACLE 3 ALTERNATING CURRENT LINE FUSED BACK VIEW 4 TO 6 POSITION CONNECTOR ON 5 TO GROUNDING STUD ON MONITOR 6 GROUNDING STUD ON PRINTED TRANSFORMER FRAME WELDMENT CIRCUIT BOARD MOUNTING PANEL BRN BROWN BLK BLACK RED RED ORN ORANGE YEL YELLOW GRN GROUND BLU BLUE VI
26. panels located at the back of the cabinet The method of opening the panel depends on the style of door To open doors with Allen latches turn the 5 32 Allen bolt counterclockwise until the latch unlocks To open doors equipped with screws remove the two Phillips head screws located at the top corners of the door Refer to the figure titled Removal of the Circuit Board Access Panels 1 REAR ACCESS Removal of the Circuit Board Access Panels Brunswick CRT Overheads 1 Overhead Replacement il NOTE Replacement of the picture tube inside the chassis may require the use of special tools and adjustment procedures Because of this it is suggested that tube replacement be performed by a qualified service technician If returning the unit for replacement remove the monitor chassis from its cabinet Do NOT return the cabinet or face plate Lowering the Monitor When lowering the monitor it is suggested that the monitors be lowered onto a carpeted dolly to avoid scratching the monitor cabinet and to aid in the transport of the unit Tools Needed Winch with Crank Handle Phillips Head Screwdriver Suggested Tools 3 8 Variable Speed Heavy Duty Drill for use with adapter attachment Extension Cord for drill Should it become necessary to replace a complete overhead unit or if you need to lower a monitor perform the following steps 1 Disconnect the following cables from the
27. regular and TV Only monitors Refer to Video Out P3 TV Out P3 Output for the global video continuing to the next monitor Refer to Video In P2 If the video does not continue to another monitor a termination plug is installed on the connector TV Only Monitor LAN In Input for the LLAN originating at Com1 output of the scorer The LLAN cable is routed through a RS 232 converter box it is sent to the TV Only monitors Through this cable the user can control the on off operation of the monitor LAN Out P4 Output for the Local LAN This connection connects to the next TV Only monitor that is controlled by the Scorer Computer Video In P1 Input connector for the global video cable originating at the Control Desk A V box This cable daisy chains to all monitors Refer to Video Out P2 Video Out P2 Output for the global video continuing to the next monitor Refer to Video In If the video does not continue to another monitor a termination plug is installed on the connector Power In Receptacle for the main power to the overhead The input here can be 120VAC or 240VAC This is selected through a voltage selection and fuse assembly built into the receptacle Refer to Selecting the Input Voltage later in this section Cahinet Access 1 REAR ACCESS Tools Required 5 32 Allen head wrench or Phillips head screwdriver The circuit boards inside of the overhead can be accessed through a door
28. rs The functions of the connectors and controls on the Video Processor PCB are 1 2 3 4 5 Adjustment PCB Connector to the Adjustment Board located on the lower access panel This allows a more convenient location to perform screen adjustments Deflection Coils Connection to the deflection coil located on the neck of the picture tube This allows the Video Processor to control where information is put on the screen Focus Adjustment Adjustment used to control the sharpness of the picture Pincushion Adjustments Adjustments used to control the top and sides of the picture so that excessive rounding or bending is eliminated Refer to the definition of pincushion in Glossary Power In 120 VAC main power input to the PCB This power is controlled by the Video Interface or the TV Only PCB and is switched through the power relay 6 Video Input Input of the RGBS signal coming from the Video Interface or TV Only PCB 7 Video Output Output to the Video Output PCB AN WARNING Before replacing the Video Processor module any voltage in the CRT or high voltage area ofthe PCB must be discharged Refer to the discharge procedure for further information Discharge Procedure 1 Disconnect main power from the overhead unit 2 Attach one end of a 14 gauge or larger wire to the shaft of an insulated handled screwdriver 3 Attach the other end of the wire to the chassis ground of the overhead
29. wick CRT Overheads 21 Screen Brightness The following adjustment allows the technician to adjust the brightness of the CRT The control is located on the lower access panel M Gain Turn this adjustment to increase or decrease the screen brightness AGC Black Level Adjustment Turn this optional adjustment to increase or decrease the screen brightness 6 2 Adjustment For both the 27 and 36 overheads the voltage should be set at 4 2 Volts 0 2 volts To measure the voltage connect the negative lead of your meter to the chassis ground Attach the positive lead to PIN 8 of the op amp chip located on the Video Output PCB Adjust as needed by turning the G 2 control located on the flyback transformer of the Video Processor PCB Refer to Figure titled Video Output PCB Video Output PCB Mm NOTE Some monitors have a plastic cover on the Output PCB The small hole in the cover allows access to the test point 28 Brunswick CRT Overheads A CAUTION Maintenance The overhead is virtually maintenance free There are however a few maintenance procedures that must be performed in order to keep the monitor operation at the optimal level To avoid injury or damage to the monitor disconnect power to the monitors before servicing them Monthly Clean Displays Using a glass cleaner and a soft cloth clean the face of the picture tube In addition remove any excess dust on the monitor cabinet wit
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