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A p p e n d i x A : R S - 2 3 2 C o m m a n d P r o t o c o l

CHRISTIE INC. - Service/PM Manual
July, 1997

3 5 / 7 0 C O M M A N D S U M M A R Y

ENTRY

COMMAND

STOP

STOP

FORWA

RD C1

FORWARD

REVERS

REVERSE

OPEN DOUSER & CINE

CLOSE DOUSER & SLEW

CLEAR CUES

SET

LOOP

SET LOOP

OUTPUT STATUS

CUE

CUE

JAM

READY

READY

(NOT READY)

READY

DISPLAY REEL COUNTER

(READY)

NOT
RDY

NOT READY

Not used

MANUAL/SHOW
CONTROLLER LOG

SET REEL COUNTER

AUTO

CYCLE TEST

CUE/ADVANCE

PLAY CURRENT SHOW

SET GOTO

FAST FORWARD

SET FRAME COUNTER

Summary of Contents for 35/70

Page 1: ...CHRISTIE I N C O R P O R A T E D 35 70 Automated Electronic Film Projector Maintenance and Service Manual CHRISTIE INC 10550 Camden Dr Cypress Ca 90630 714 236 8610 Fax 714 229 3185...

Page 2: ...that may appear in this document CHRISTIE CHRISTIE or its subsidiaries designated representatives and any other vendor of the 35 70 Automated Film Projector are not responsible in any way for any lia...

Page 3: ...f detail that are suitable for various purposes For operators and for general information see Section 2 General Description Section 3 Operating the Projector Section 4 Periodic Maintenance Section 8 E...

Page 4: ...erfaces directly with the 35 70 projection system is not covered in this manual The projector can operate at speeds of 24 25 30 48 or 60 frames per second and can be configured to use 35 millimeter or...

Page 5: ...Service PM Manual July 1997 Installation and Unpacking This section provides unpacking information installation data and external connection data for the 35 70 Projector For physical and electrical in...

Page 6: ...2 G e n e r a l D e s c r i p t i o n CHRISTIE INC 35 70 Service PM Manual July 1997 The lamphouse is not part of the projector system...

Page 7: ...he selected floor area should be of extremely solid construction to minimize transmission of floor vibration to projection equipment 2 When the projector is supplied without a lamphouse attach the pro...

Page 8: ...2 G e n e r a l D e s c r i p t i o n CHRISTIE INC 35 70 Service PM Manual July 1997 Refer to Section 6 8 for correct voltage strapping of power supply transformers prior to connection...

Page 9: ...show and the number of the show that is to be played next called next show The projector has sensors that detect the reflective tape used to indicate the show number beginning of film BOF and end of f...

Page 10: ...he reel counter and frame counter were compared at the point that is 2 minutes 37 seconds and 15 frames into Show 2 their values would be Reel Counter 01 06 55 19 3 52 14 0 16 20 2 37 15 Frame Counter...

Page 11: ...orations in error and corrects the error during the next pulldown by pulling either more or less film as appropriate The pulldown is automatically synchronized with the shutter as the running frame ra...

Page 12: ...own in Figure 2 1 The keypad LED display strip normally indicates the frame counter for the current show However this display strip may also display other command specific information as explained in...

Page 13: ...ndicators The LEDs associated with the keypad provide an indication of projector status Table 2 3 contains a list of the keypad LEDs and their indications Upon detection of a malfunction that causes a...

Page 14: ...in the gate 8 There is EOF sensor tape in the gate 9 Keypad control is enabled CLEAR AUTO The projector is in the CYCLE TEST mode G The projector is receiving or performing one of the G function comma...

Page 15: ...et Projector commands are encoded in a hexadecimal character format They are sent to the projector by the show controller by a service terminal or from the keypad Some common commands have been assign...

Page 16: ...try or LED is described the key s identity is enclosed in brackets as STOP If more than one key must be hit keystrokes are separated by a comma C0 The STOP Command OP L This operational command causes...

Page 17: ...d the douser will automatically open after 3 seconds 3 Play current show 4 Stop at EOF marker 5 Rewind to head of show STATUS Set to 1 while advancing with douser closed set to 3 while playing with do...

Page 18: ...d put the projector into slew mode STATUS Set to 1 C5 The CLEAR CUES Command OP This operational command is used to erase all previously programmed BOF and EOF cue points ENTRY CMD C 5 CODE C5 ACTION...

Page 19: ...ference Load the film on the reel so that the BOF tape for Show 1 is above the gate or on the supply reel Chapter 3 READY READY Puts projector into READY mode Section 0 SET MAX SHOWS 5 H D 5 Sets numb...

Page 20: ...t show on the film this may not be the next show in a programmed sequence A CUE command must be issued prior to the first time a show is played after the system powers up thereafter the projector trac...

Page 21: ...nter a G1 DISPLAY COUNTER command ENTRY READY CODE CA ACTION S 1 Apply power to motor systems 2 Check all limit switches 3 Check the CV Pulldown and Shutter motor systems 4 Set loop 5 Execute single f...

Page 22: ...res the entered BOF or EOF value STATUS Unchanged Before beginning the manual logging process it is necessary to create a log sheet such as the one shown in Figure 2 2 SHOW SHOW NAME START TIME STOP T...

Page 23: ...t have been entered Enter the C D command followed by a 1 to indicate Show 1 then press ENTER to step through the entire set of BOF and EOF reel times BOF and EOF values are not changed CD The SHOW CO...

Page 24: ...a second CYCLE TEST command is entered The current cycle completes and the system returns to the start point of the first show A STOP command pauses the cycle a FORWARD or REVERSE command resumes oper...

Page 25: ...EXT SHOW command see Section 0 STATUS Set to 1 while moving to first frame Set to 3 while playing douser open Set to 0 when stopped at end of show H2 The SET GOTO Command DX This diagnostic command al...

Page 26: ...d should only be used if there is a problem with the current value ENTRY CMD H 4 CODE H4 INPUT 1 Enter the new value for the frame counter in the counter format hh mm ss ff see Section 0 2 Press ENTER...

Page 27: ...Command DX L This diagnostic command triggers the projector to move the film to the point in the show that was previously set with the SET GOTO command see Section 0 ENTRY CMD H 6 CODE H6 ACTION S 1...

Page 28: ...layed for one second before the numeric display reverts to the frame counter The new next show value must be entered while the show values are displayed ENTRY CMD H 8 CODE H8 ACTION S 1 Display curren...

Page 29: ...r MASTER projector Commanding the projector into INTERLOCK mode before a READY causes the projectors shutter to lock into a position 180 degrees out of phase This mode is useful for applications that...

Page 30: ...mode CODE HC ACTION Displays pulldown gain STATUS Not applicable HC NOT RDY The BRAKE RELEASE Command DX This diagnostic command is used to release the upper torque motor brake to allow for easier fi...

Page 31: ...ock mode allows the projector to be interlocked via BI Phase to an external motion source or MASTER projector To prevent film damage enter this command only when the external motion source is idle ENT...

Page 32: ...ewhat From the projector control console the sequence is All alphabetic characters terminal hexadecimal digits entered into the service terminal must be upper case ENTRY G 0 CODE G0 INPUT Enter the fo...

Page 33: ...dress is shown to the right of that address on the terminal s display yy New value for memory location two hex digits Value at selected address is updated Up arrow cursor Increment memory location Dow...

Page 34: ...elect 25 frames per second Enter a 3 from the keypad to select 30 frames per second Enter a 4 from the keypad to select 48 frames per second Enter a 6 from the keypad to select 60 frames per second 2...

Page 35: ...ilm STATUS Unchanged G4 The LOAD REEL COUNTER Command DX This diagnostic command loads the time code value of the frame counter register into the reel counter register This command is used for motion...

Page 36: ...ch preceded by a PROMPT STATUS Unchanged Output Meaning PROMPT CR LF hh mm ss ff PROMPT BOF for Show 1 hh mm ss ff PROMPT EOF for Show 1 hh mm ss ff PROMPT BOF for Show 2 hh mm ss ff PROMPT EOF for Sh...

Page 37: ...from the top of R150 is 0 volts 1 volt This adjusts upper torque arm position 4 Adjust R136 so that the upper torque arm sensor voltage as measured from the top of R149 is 0 volts 1 volt This adjusts...

Page 38: ...last five commands sent to the projector over the RS 232 communication port The status is output on the RS 232 port to the show controller or the service terminal These commands are recorded only when...

Page 39: ...mmand is used to park the BOF sensor tape in the gate The use of this command is associated with operating the projector in the Master or Slave mode and can be issued after a CUE command See Section 2...

Page 40: ...ISTIE INC 35 70 Service PM Manual July 1997 GF The SOFTWARE VERSION Command DX This diagnostic command triggers the output of an ASCII string containing the software version number ENTRY CMD G F CODE...

Page 41: ...the film as it might not be read through the film if it is positioned on the base side When a start command is given the film accelerates to cine speed before it encounters the BOF marker The film de...

Page 42: ...ulled into the bottom the total bottom loop guide is 75 full For 35 millimeter film thread the film so that there are 20 frames plus 1 frame for every 50 feet of projector to screen distance of film b...

Page 43: ...utter comes up to speed and is tested 5 The STOP and READY LED s go on and the SET LOOP LED goes off 6 Enter a CUE press CUE command The film moves forward in slew motion at 15 fps until the BOF tape...

Page 44: ...ector then automatically cue s both projectors so that they are ready for the next show 8 Repeat steps 1 to 7 to play the next show Master Motion Controller Operation If the projector is to be used in...

Page 45: ...e projector must be taken out of interlock with the LOCAL MODE HE command and rewound to the start of the show by entering a CUE NEXT H7 command into the projector 10 Repeat steps 2 to 9 to play the n...

Page 46: ...ists equipment that should be available in the projection booth It should be easy and convenient for the projectionist to perform any required maintenance If the proper tools are not at hand it is unl...

Page 47: ...ckle trips Check Sprockets Check torque arms Check picture quality Table 4 2 Daily Preventive Maintenance Checklist Log Sheet CHRISTIE CHRISTIE 35 70 Projector Weekly Preventive Maintenance Log Sheet...

Page 48: ...nections Table 4 4 Monthly Preventive Maintenance Checklist Log Sheet CHRISTIE CHRISTIE 35 70 Projector Semiannual Preventive Maintenance Log Sheet Year 19 ________ Action Required Date Performed Inte...

Page 49: ...rews damaged cables etc Replace Particle Transfer Rollers Clean back of projector with vacuum Table 4 6 Annual Preventive Maintenance Checklist Log Sheet CHRISTIE CHRISTIE 35 70 Projector Lamphouse Pr...

Page 50: ...ll debris from the rollers Insure that the rollers are completely dry before re installing 2 If necessary clean the projection lens using the lens cleaning kit 3 Using the soft cloth carefully wipe th...

Page 51: ...AREA 14 2269 SHUTTER ENCODER 15 SHUTTER MOTOR 16 2275 PULL DOWN AMPLIFIER 17 CONSTANT VELOCITY C V MOTOR 18 2269 C V MOTOR ENCODER 19 DOUSER INTERLOCK RELAY 20 LOWER BUCKLE LIMIT SWITCH 21 PULL DOWN M...

Page 52: ...LL DOWN SPROCKET 16 2268 PULL DOWN SENSOR 17 LOWER C V BUCKLE PLATE 18 LOWER LOOP GUIDES 19 LOWER C V SPROCKET 20 35mm OPTICAL HEAD 21 PRE AMPLIFIER LOWER PARTICLE TRANSFER ROLLERS 22 LOWER TACHO GENE...

Page 53: ...igure 4 2 2 Clean the DTS head or Magnetic head with a cotton swab dipped in isopropyl alcohol or using a soft brush 3 Open the back of the projector and vacuum the circuit boards 4 Generally clean al...

Page 54: ...f the filter to free the filter from the threaded center post and slide the filter off d If replacement is not necessary clean the element 1 Blow dry compressed air 30 PSI or less through the element...

Page 55: ...o generator is secure and there is no slippage between the generator and the roller 2 Check all power supply voltages 5V 15V 34V and 24V 3 Ensure the reeling motor brakes are operating properly in the...

Page 56: ...terrelationship and timing between these circuits is shown schematically in the film velocity diagram and the system timing diagram both in Section 8 15 Miscellaneous Diagrams The Shutter Control Circ...

Page 57: ...and direction of the constant velocity motor is controlled by the CPU The pulldown motor is slaved to the constant velocity motor so film moves through the film gate smoothly During slew operation the...

Page 58: ...mplifier U22 is sent to comparator U42 where the error signal is converted into a pulse width modulated PWM signal by comparing with a sawtooth input This output is sent through photocouplers to the P...

Page 59: ...r Second 24 FPS 240 PPS 30 FPS 300 PPS 48 FPS 480 PPS 60 FPS 600 PPS 120 FPS 1200 PPS Table 5 4 Constant Velocity Rates for Film Speeds A direction signal is also supplied by the CPU These signals are...

Page 60: ...e mode During slew operation the pulldown motor must be locked to the constant velocity motor so film moves smoothly through the film gate Figure 5 5 shows the pulldown circuit configured for slew ope...

Page 61: ...plifier Card driving the Pulldown motor Figure 5 7 shows the timing relationships during the pulldown action Prior to time 0 on the diagram the film is in registration and is being illuminated by the...

Page 62: ...et value The CPU rewinds four and one half frames and stops in registration A two second timeout stops the pulldown motor if there is no film in the projector and illuminates LED 3 on the keypad A fra...

Page 63: ...applied in the take up direction The circuit is biased in such a manner that the input signal from the optical pot will be zero volts when the torque arm is at normal position independent of speed Th...

Page 64: ...l Sensor is monitored using comparator U34 Transistor Q10 disables the PWM output in the Platter mode of operation The Sync Separator Card 0300 The Sync Separator card see Section 8 2 is used to extra...

Page 65: ...gates and flip flops Control Circuitry much of which is described in Section 5 1 The CPU Section The CPU section of card 2293 illustrated in Section 8 7 uses a 6809 processor with a built in crystal...

Page 66: ...PIAs and the ACIA and controls the PTM Based on the information received the processor sends the necessary control signals to the PIAs to operate the pulldown constant velocity and shutter motors A ph...

Page 67: ...also Section 8 14 The EOF tape is detected by comparator U35A The output of U35A goes high while the tape is being detected it is input to the CPU through a PIA The BOF tape is processed in a similar...

Page 68: ...1 inputs the Pulse Width Modulated signal to U5 U7 while U2 inputs the direction signal U3 and U4 activate bilevel drivers Q2 and Q3 Q1 is used to activate photocouplers on the 2293 card that limit cu...

Page 69: ...errupt routines with background routines for less time critical functions provides the speed required for projector operation along with the robustness of full command functionality Fail safe hardware...

Page 70: ...ety Check Douser Char Keybd Warning Indicate Fault Set to Not Ready Execute Command Yes No Yes No Yes No Yes No INTRPT Shutter Yes No Do Pulldn Yes No Pulldown at Cine Speed Fwd CV Int Do Pulldn Yes Y...

Page 71: ...a part has been accidentally disturbed The order and grouping of the adjustments in this section represents the typical approach to the projector and is related to the diagnostic approach embodied in...

Page 72: ...8 7 These sensors operate by detecting either the amount of light reflected from the film non active or a piece of FORMLINE silver tape attached to the film active The tape should be 3 8 inch wide it...

Page 73: ...6 M e c h a n i c a l a n d E l e c t r o n i c A d j u s t m e n t s CHRISTIE CHRISTIE 35 70 Service PM Manual March 1997 Tape may not be seen through the film if it is placed on the base side...

Page 74: ...vision horizontally and 1 0 volts per division vertically Set the trigger to automatic If using a voltmeter set the scale to 20 Volts 2 To adjust the BOF sensor voltage adjust VR7 for a level of 2 0 V...

Page 75: ...stop 3 Remove the disk sensor cover 4 Loosen the locking screws so that the sensor assembly can be moved with respect to the disk See Figure 6 2 5 Loosen the set screw holding the disk to its shaft 6...

Page 76: ...the upper torque arm sensor voltage as measured from the top of R149 is 0 volts 1 volt This adjusts lower torque arm position 5 Repeat steps 3 5 with speed values of 20 30 40 50 60 70 and 80 6 Enter...

Page 77: ...itter free picture while running cine forward Both a 90 degree and a zero degree signal are used to form a biphase signal that locks the pulldown sprocket to the constant drive sprocket during slew mo...

Page 78: ...d E l e c t r o n i c A d j u s t m e n t s CHRISTIE CHRISTIE 35 70 Service PM Manual March 1997 Pulldown Signal TP13 Figure 6 4 a Pulldown Signal Gain Too Low Pulldown Signal TP13 Figure 6 4 b Pulld...

Page 79: ...ly power to the lamphouse strike the lamp and power the projector Enter a READY command hit the READY key 3 Slightly loosen the two screws securing the pulldown sensor card 4 Enter a FORWARD command t...

Page 80: ...cope to pin 3 of U19 The phase relation should be about 90 degrees as shown in Figure 6 6 The quadrature relationship is required when the projector executes high speed slew motion operations If adjus...

Page 81: ...refer to the 35 70 Power Supply component layout in Section 8 4 240 VAC Operation To configure the 35 70 projector for 240 VAC operation 1 Remove the jumper from terminals 1 3 and 2 4 on T1 and the ju...

Page 82: ...the outer edge of the rail on the fixed film gate Movable Gate Stop Adjustment The gate stop can be moved in or out by first back threading the 20 socket cap screw then adjusting the stop limit set s...

Page 83: ...s and knobs are tightened against the flats on the shafts 7 Install the 35mm C V sprocket pad shoes on the upper and lower C V sprockets Insure that the gap between the Delron pad and the sprocket is...

Page 84: ...isolates the particular failures or mis adjustments that can cause the condition Repair or adjustment is described to allow the technician to repeat the sequence progressing to the next abnormal cond...

Page 85: ...d to identify any open connectors loose film guides failed bearings broken belts etc See Tables 7 2 7 3 and 7 4 Correct any deficiencies found in the visual check Step 2 This step is described in Sect...

Page 86: ...The click from the limit switch should be audible near the relaxed end of the arm motion A2 Verify that all Guide Rollers rotate freely with a minimum of lateral play Note that the Torque Arm Rollers...

Page 87: ...B3 Gently verify Lower Torque Sensor and Disk 34 are tight B4 Verify that the four belts are undamaged and properly tensioned B5 Verify Upper and Lower Brakes 2 31 are engaged and that there is no pla...

Page 88: ...1 None of the control lights comes on Step Diagnostic Result 1 Verify 5 volt supply is correct at J1 of the 2267 card in the control panel head If not determine fault and repair 2 Verify that the ribb...

Page 89: ...vates 3 Visually verify that the Upper and Lower Torque Arms move to centered position and that the reel brakes are released Verify that system is stable reels do not oscillate 4 Visually verify that...

Page 90: ...the LED still remains lit proceed to Step 3 3 The 2267 keypad or the 2293 CPU Main Logic card could be defective Repair or replace as necessary 1 2 LED is on CONDITION 2 LED 5 is on Step Diagnostic R...

Page 91: ...if necessary 5 If the LED still remains lit the 2267 keypad or the 2293 CPU Main Logic card could be defective Repair or replace as necessary 1 4 LED is on CONDITION 4 LED 2 is on Step Diagnostic Resu...

Page 92: ...e lower torque 2285 amplifier card and READY relay are not damaged and are correctly plugged in 3 Verify that the time delay relay contacts on K2 in the power supply are closing approximately 3 second...

Page 93: ...volts as arm is moved to its extremes zero volts should be near the center of travel Readjust if necessary 3 Monitor supply voltage at the plus side of the 2285 card as the READY button is pushed This...

Page 94: ...embly are correct The spring tension adjustment should be checked and corrected if necessary See Section 6 3 3 Oscillation could indicate worn brushes in the Torque motor or tacho generator assembly R...

Page 95: ...1 Check the 8 amp fuse fuse 1 associated with the 34 volt supply of the Pulldown system Verify that the 34 volt supply does reach the 2275 card 2 Verify that the input to the 2275 card at R102 or at T...

Page 96: ...e film one frame and lock CONDITION 2 The constant velocity sprocket turns with enough force or speed to trip the buckle switch or damage film Step Diagnostic Result Replace the 2285 card 5 3 The Cons...

Page 97: ...m and lock Since a Loop Set was performed in Section 3 of this table those checks need not be repeated CONDITION 1 Pulldown sprocket offers no resistance to movement by hand Step Diagnostic Result 1 R...

Page 98: ...ure determine wiring fault or defective encoder and repair or replace b If shutter is not moving continue to step 4 4 Verify the reference frequency at TP33 of the 2293 card This square wave should ha...

Page 99: ...by pushing the button sequence CMD H 3 Checklist Item Step Description Completed Verify that the film accelerates to 120 frames per second in a smooth and linear motion B Push the STOP button and afte...

Page 100: ...N 2 Film ramps up smoothly to maximum speed but upper loop is lost while going forward Step Diagnostic Result 1 Verify that the Constant Velocity Tach voltage reaches the 2293 card If not repair wirin...

Page 101: ...ower Torque Arm assemblies are equal and at their proper value An imbalance puts excessive load on the Constant Velocity system Readjust if necessary See Section 6 3 A 5 Film does not ramp smoothly to...

Page 102: ...utton After film speed stabilizes enter the C 3 command to cause the douser to open Checklist Item Step Description Completed 1 Verify that the film accelerates to the pre programmed film rate in a sm...

Page 103: ...e secure in their sockets Verify that the douser relay does function Determine bad solenoid or wiring fault and repair or replace 2 If relay does not function determine if fault is the driver on the 2...

Page 104: ...at least one quarter turn to produce one high going pulse If pulse is not present trace to the 2276 card and finally to the pulldown sensor to determine failure point Repair wiring fault or replace 22...

Page 105: ...just if necessary See Section 6 5 4 It is possible for a Pulldown amplifier to have defective output transistors and function in all modes except Pulldown Replace 2275 card 5 It is possible for one of...

Page 106: ...sary unless parts associated with the shutter system have been replaced 2 If the shutter ghosting adjustment must be made on a regular basis verify that all mechanical parts are properly tightened A l...

Page 107: ...l Pot Assembly 0208 Optical Sensor Assembly 0300 Sync Separator 1008 Frame Counter Display 1034 Power Supply Assembly 2262 Bi Level Interface 2267 Keypad 2268 Pulldown Sensor 2269 Shutter and CV Encod...

Page 108: ...S E C2 REVERSE C3 OPEN DOUSER CINE C4 CLOSE DOUSER SLEW C5 CLEAR CUES SET LOOP C6 SET LOOP C7 OUTPUT STATUS CUE C8 CUE C9 JAM READY CA READY NOT READY READY CA DISPLAY REEL COUNTER READY NOT RDY CB NO...

Page 109: ...RROR HC PULLDOWN GAIN DISPLAY READY HC BRAKE RELEASE NOT READY HD SET MAX SHOWS HE LOCAL MODE HF DISPLAY START G0 MEMORY INSPECT G1 DISPLAY FRAME COUNTER G2 SELECT FRAME RATES G3 AUTO DOUSER G4 LOAD R...

Page 110: ...A p p e n d i x A R S 2 3 2 C o m m a n d P r o t o c o l CHRISTIE INC Service PM Manual July 1997...

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