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Christie 35/70 Maintenance And Service Manual

Automated electronic film projector
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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

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  • 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 CHRISTIE assume responsibility for errors that may appear in this document. its subsidiaries, designated representatives, and any other vendor of the 35/70 Automated Film Projector are not responsible in any way for any liabilities or loss resulting from the use or misuse of this document.

  • Page 3: Contents Of The Manual

    1 . I n t r o d u c t i o n I N T R O D U C T I O N Contents of the Manual This manual contains operation, maintenance, and service information for the 35/70 Automated Film Projector. The material covered includes: •...

  • Page 4: General Description

    The 35/70 Automated Film Projector can be used stand alone, interlocked, or used with a compatible show controller. The operation of the show controller, except as it interfaces directly with the 35/70 projection system, is not covered in this manual.
  • Page 5 2 . G e n e r a l D e s c r i p t i o n Installation and Unpacking This section provides unpacking information, installation data, and external connection data for the 35/70 Projector. For physical and electrical installation of the lamphouse, refer to the lamphouse manual.
  • Page 6 2 . G e n e r a l D e s c r i p t i o n The lamphouse is not part of the projector system. CHRISTIE INC. - 35/70 Service/PM Manual July, 1997...
  • Page 7 When the projector is supplied without a lamphouse, attach the projector with the four bolts supplied to the lamphouse base. Refer to the lamphouse manual for physical mounting instructions for the lamphouse. Electrical connection for the 35/70 Projector consists of the following connections and cables •...
  • Page 8 2 . G e n e r a l D e s c r i p t i o n Refer to Section 6.8 for correct voltage strapping of power supply transformers prior to connection. CHRISTIE INC. - 35/70 Service/PM Manual July, 1997...

  • Page 9: Control Ports

    Film and Shows The reeling system holds approximately 2000’ of film. The recommended type of film to use on the 35/70 projector is a polyester based film. A film reel may contain from one to six different shows of varying length; the projector assumes there is one show on a reel, unless a greater value is programmed (see Section 0).

  • Page 10: Normal Operation

    When the next show is identified, the projector moves at two times the normal speed (120 fps), cues to the CHRISTIE INC. - 35/70 Service/PM Manual July, 1997...
  • Page 11 60 or 50 Hz, and sets the proper multiplier to maintain the system clock at 192 KHz. Crystal operation may be selected by a jumper plug on the Central Processing Unit/Main Logic card. CHRISTIE INC. - 35/70 Service/PM Manual July, 1997...

  • Page 12: The Control Panel

    0. LEDs on the keys associated with projector commands toggle on to indicate projector action. For example, if the projector is stopped, the light on the <STOP> key is on. Figure 2.1: Control Panel CHRISTIE INC. - 35/70 Service/PM Manual July, 1997...
  • Page 13 (hours + minutes + seconds) and frame count within a second, expressed in the standard counter format hh:mm:ss:ff. Some of the 35/70 projector operating and diagnostic commands use positions on the frame counter LED display to display values or echo input for verification. Refer to the individual command write-ups in Section 0 for detailed explanations of these instances.
  • Page 14 The projector is performing a loop set function. READY The projector is in READY mode. The projector is performing a CUE function. NOT RDY The projector is in the NOT READY mode. Table 2.3: Keypad LED Indicators CHRISTIE INC. - 35/70 Service/PM Manual July, 1997...

  • Page 15: System Status

    Some common commands have been assigned to specific keys on the command area of the keypad. When operating the 35/70 projector in a MASTER/SLAVE configuration, the serial communications port on the SLAVE projector connected to the MASTER will lock out certain commands from the MASTER projector.
  • Page 16 This operational command causes the projection system to play the current show and then return to the head of the film. When running the projector in a Master/Slave configuration use the PLAY CURRENT SHOW CHRISTIE INC. - 35/70 Service/PM Manual July, 1997...
  • Page 17 This operational command moves the film in a reverse direction to the start of the current show. <REV> NTRY Reverse to head of current show. CTIO Set to 8 while moving to cue for next show; TATUS set to A while parked at cue. CHRISTIE INC. - 35/70 Service/PM Manual July, 1997...
  • Page 18 BOF tape for Show #1 is above the gate or on the supply reel. Then follow the command sequence described. BOF and EOF tapes must be affixed to the film for all shows that are to be programmed. CHRISTIE INC. - 35/70 Service/PM Manual July, 1997...
  • Page 19 SET NEXT SHOW <H> , <8> , Sets Show #2 as next Section 0 <2> show. <CUE> Projector cues on BOF Section 0 of Show #2. Table 2.5: Command Sequence for Auto Logging CHRISTIE INC. - 35/70 Service/PM Manual July, 1997...
  • Page 20 01:00:00:00. The JAM command is useful if there is a requirement to inspect the new value immediately or to set MASTER and SLAVE start times to the same value. CHRISTIE INC. - 35/70 Service/PM Manual July, 1997...
  • Page 21 <NOT RDY> NTRY 1. Remove power from motor systems. CTION 2. Reinitialize software values and turns the AUTO DOUSER command off . 3. Reset LED error indicators. Set to B. TATUS CHRISTIE INC. - 35/70 Service/PM Manual July, 1997...

  • Page 22: Start Time

    Table 2.6 illustrates the sequence of commands to program the shows from the Sample Log Sheet in Figure 2.2. CHRISTIE INC. - 35/70 Service/PM Manual If an entry error is made, press <CLEAR> to re-enter. When the displayed value is correct, press <ENTER>.
  • Page 23 This diagnostic command allows the user to manually change the value of the reel counter. <C> , <E> NTRY Desired reel counter value in the counter format hh:mm:ss:ff NPUT (see Section 0). Sets the reel counter to the new value. CTION Unchanged. TATUS CHRISTIE INC. - 35/70 Service/PM Manual July, 1997...
  • Page 24 1. Move forward at 15 fps in cine mode until BOF marker is CTION located. 2. Update frame counter. 3. Park at BOF mark. Set to 8 while searching for BOF marker; TATUS set to A while parked at cue point. CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 25 1. Enter the desired goto point with the numeric portion of the NPUT keypad. This is entered in the counter format hh:mm:ss:ff (see Section 0). 2. Hit the <ENTER> key. Load the goto point value. CTION Unchanged. TATUS CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 26 The current show and next show values are displayed for one second before the numeric display reverts to the frame counter. The new current show value must be entered while the show values are displayed. CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC.
  • Page 27 CUE NEXT cues the projector in front of the next show in the pre-programmed series of shows on the film. The CUE command cues the projector to the next show located when moving the film in a forward direction. CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC.
  • Page 28 60Hz operation. The battery backup RAM on the CPU card will maintain the frequency setting, so this command should only be used once. As shown in the two leftmost digits of the keypad LED display strip. CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 29 This diagnostic command triggers a “Cause of Fault” message over the RS-232 interface. The message displays on a workstation that is connected to the RS-232. <CMD-H>, <B> NTRY Send error message, coded in ASCII, over RS-232. CTION Unchanged. TATUS CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 30 (See Section 0), CYCLE TEST (See Section 0), SET CURRENT SHOW (See Section 0), and SET NEXT SHOW (See Section 0). If this command is not used, the default maximum number of shows is set to 1. CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 31 This diagnostic command displays the GOTO frame that was programmed using the SET GOTO command (see Section <H> , <F> NTRY Displays the GOTO frame in the standard counter format of CTION hh:mm:ss:ff (see Section 0). Unchanged. TATUS CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 32 2. Enter the G1 command to return to the frame counter display. Unchanged. TATUS The sequence of commands and inputs from a service terminal is shown in Table 2.7. CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 33 G 1 : T h e D I S P L A Y F R A M E C O U N T E R C o m m a n d [ D X ] This diagnostic command causes the current frame counter value to be displayed on the LED strip. <CMD-G>, <1> NTRY Display the current frame counter value. CTION Unchanged. TATUS CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 34 3. Display number of perfs in the last position on the LED display, as shown in Figure 2.3. Unchanged. TATUS 30 fps 5 perfs Figure 2.3: SELECT FRAME RATES LED Display CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 35 This operational command sets the projector to platter mode. This command is recognized only in the NOT READY state. <CMD-G>, <5> NTRY Disables upper and lower torque arm operation. Enter a NOT CTION READY command to reset projector to the default reel mode. Unchanged. TATUS CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 36 G7 (also HD, from remote interface only) LED 0 flashes and remains OFF if shutter speed is correct. CTION LED 0 flashes and remains ON if shutter speed is incorrect. Unchanged. TATUS CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 37 Enter the DISPLAY FRAME COUNTER ( <G> , <1> ) NPUT command to return the display to normal. Not applicable. TATUS Entering speed values greater than 50 can cause projector and film damage. CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 38 0 3 : 5 7 : 1 4 : H 8 : 2 indicates that, at 3 minutes, 57 seconds, the 14th frame, the command H8 was received, and the response 2 was made. Unchanged. TATUS CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 39 This command is used to engage the sound head lifter solenoid. This command is mainly used when projectors are used in the Master/Slave configuration. <CMD-G>, <E> NTRY Engages sound head lifter solenoid. CTIO Unchanged. TATUS CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 40 G F : T h e S O F T W A R E V E R S I O N C o m m a n d [ D X ] This diagnostic command triggers the output of an ASCII string containing the software version number. <CMD-G> , <F> NTRY Returns software version number. CTION Unchanged. TATUS CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...

  • Page 41: Operating The Projector

    BOF tape can be calculated by multiplying the frame rate by 3. This will give the number of frame position, before first frame of picture, for the BOF tape CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...

  • Page 42: Threading Film

    Figure 3.1: EP-35/70 Projector Threading Diagrams 35mm Film Threading 70mm Film Threading 70mm Film Threading With DTS head With DTS Head With Magnetic Head CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...

  • Page 43: Operating Instructions

    The projector will not pick up commands from the show controller until after a SHOW CONTROL ENABLE (<G9>) command is entered. CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC.
  • Page 44 Entering a PLAY CURRENT SHOW (<K1>) into the Master Motion Controller will start the show. Sending a OPEN DOUSER (<C3>) command to the projector will project the picture, or it will occur automatically if the AUTO DOUSER (<G3>) command has been entered. CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 45 Stop the projector if it is in motion. <NOT RDY> : Remove power from projector motors. Power to the projector, lamphouse, and show controller may then be removed in any order. CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...

  • Page 46: Periodic Maintenance

    CHRISTIE CHRISTIE To properly maintain the 35/70 Automatic Electronic Projector and avoid damage to the film, a certain amount of routine preventive maintenance is required. Proper maintenance aids in preventing untimely system breakdowns. This section describes the appropriate maintenance procedures.
  • Page 47 Vacuum circuit boards Clean surfaces at rear of projector Lubricate gate center pin Clean gate glass Check gate shoe spring tension Check all mechanical connections Table 4.3: Weekly Preventive Maintenance Checklist/Log Sheet CHRISTIE INC. - 35/70 Service/PM Manual July, 1997...
  • Page 48 Check CV Buckle shoes for wear Interval 2 Check brushes on servo motors and Pulldown motor Check BOF/EOF sensor voltage Check CV Buckle shoes for wear Table 4.5: Semiannual Preventive Maintenance Checklist/Log Sheet CHRISTIE INC. - 35/70 Service/PM Manual July, 1997...
  • Page 49 Date: ______/______/______ Lamphouse Hour Meter Reading: ____________ Action Required Date Performed Clean lamphouse mirror Vacuum lamphouse assembly Check lamp connectors Check douser assembly Check cooling blowers Table 4.7: Lamphouse Preventive Maintenance Checklist/Log Sheet CHRISTIE INC. - 35/70 Service/PM Manual July, 1997...
  • Page 50 Check the sprockets (see Figure 4.2) or smooth movement. Since the two constant-velocity sprockets are driven together, turn either one to check them both. The pulldown sprocket (see Figure 4.2) is directly driven, and does not need to be checked. CHRISTIE INC. - 35/70 Service/PM Manual July, 1997...
  • Page 51 PULLEY 32. LOWER ARM LIMIT SWITCH 33. 2285 LOWER TORQUE MOTOR AMPLIFIER 34. LOWER TORQUE ARM AND OPTICAL ASSEMBLY 35. LOWER ARM TENSION SPRING Figure 4.1: Maintenance Locations on Projector Mechanical Side CHRISTIE INC. - 35/70 Service/PM Manual July, 1997...
  • Page 52 Check both upper and lower torque arm trip switches (see Figure 4.1). Ensure that, when the arm is relaxed to within one inch of its resting position, the corresponding LED on the control panel goes on. CHRISTIE INC. - 35/70 Service/PM Manual July, 1997...
  • Page 53 Remove and clean the gate glass (see Figure 4.2) with isopropyl alcohol and lens cleaning tissue. Ensure that the Delrin shoes on the movable gate have adequate spring tension; adjust the tension if it is too weak. Check all mechanical connections (screws, etc.) and tighten as needed. CHRISTIE INC. - 35/70 Service/PM Manual July, 1997...
  • Page 54 Pleated media is cut, torn, worn, or uncleanable. • Metal end caps (if so equipped) are bent out of flat. • Perforated metal bent into pleated media. • Gasket is cut, deformed, or damaged in any manner. CHRISTIE INC. - 35/70 Service/PM Manual July, 1997...
  • Page 55 Check the lamp connectors for corrosion and security. Check for any loose connectors. Check douser limit bumpers for wear and replace if necessary. Refer to the lamphouse manual for any other specific maintenance requirements. CHRISTIE INC. - 35/70 Service/PM Manual July, 1997...

  • Page 56: Theory Of Operation

    T H E O R Y O F O P E R A T I O N This section describes the theory of operation for the 35/70 projector. The description introduces a general view at an overall block diagram level, and then details the function of each block in subsequent paragraphs. Circuit diagrams and component layouts for each card are found in Section 8 of this manual.
  • Page 57 5 : T h e o r y o f O p e r a t i o n Figure 5.1: 35/70 Electronic Projector Block Diagram The incremental motion of the film in the gate is taken up by the film loops maintained for this purpose. The upper and lower torque motors are controlled by the position of the respective torque arms, and operate to maintain the torque arms stationary, independently of the amount of film on the supply and take-up reels.
  • Page 58 60 Hz reference crossover, and adds or subtracts pulses from the 24 KHz reference to the Shutter EPLD to ensure synchronization. This also ensures exact frame-per-frame blanking correspondence for multiple projector applications. CHRISTIE INC. - 35/70 Service/PM Manual CHRISTIE INC. -...
  • Page 59 DRM speed pulses, using the SERVO9 EPLD U15 as an up-down counter. The eight-bit output of this counter is converted into an analog voltage by DAC U52, and amplified by U18 before being summed into U23. To CHRISTIE INC. - 35/70 Service/PM Manual CHRISTIE INC. -...
  • Page 60 PD Disk Sensor UP / DN Pulldown Drive CNTR CV Encoder 2275 Open D-AMP SUMMING PULLDWN3 CV Tach Pulldown Amplifier Card Main Electronics Card Figure 5.5: Slew Operation - Pulldown Circuit CHRISTIE INC. - 35/70 Service/PM Manual CHRISTIE INC. - July, 1997...
  • Page 61 An automatic circuit detects any incorrect registration, such as might be caused by a change in motor characteristics. If registration is not correct, the correction voltage used on the next pulldown is changed to ensure correct registration. CHRISTIE INC. - 35/70 Service/PM Manual CHRISTIE INC. - July, 1997...
  • Page 62 1 film perforation, for 70mm film. For 35mm film the increments equal 1/5 of the 4 perforation film frame. This avoids the need to relocate the film on the sprocket if the film is not framed. CHRISTIE INC. - 35/70 Service/PM Manual CHRISTIE INC. -...
  • Page 63 The major electronic components are the PWM Amplifier and the Reel Control circuitry on the Main Electronics Board. (See Figure 5.9.) CHRISTIE INC. - 35/70 Service/PM Manual CHRISTIE INC. -...
  • Page 64 The jumper settings on the board control 50/60Hz line frequency, external 60Hz, vertical video synchronization, and internal synchronization (See Table 5.10). When operating the 35/70 projector in the Master/Slave mode it is important the both projectors are receiving their sync from the same source.
  • Page 65 ACIA to ±15 volts, as required for an RS-232 interface. U8 shifts incoming 12-volt levels to 0 - 5 volts for the ACIA. The PTM divides the CPU clock to 153.6 KHz, as required for the ACIA, and scales other rates for motor drive circuits. The ACIA communicates at 9600 baud. CHRISTIE INC. - 35/70 Service/PM Manual CHRISTIE INC. - July, 1997...
  • Page 66 The 192 KHz signal input to the DRM can be multiplied by any value from .00 to .99. This function provides a precise set of frequencies that are stepped from one value to another to ramp motors up and down in speed with linear and consistent accelerations. CHRISTIE INC. - 35/70 Service/PM Manual CHRISTIE INC. - July, 1997...
  • Page 67 I n t e r l o c k O p e r a t i o n The 35/70 Projector has the capability to be directly controlled by an external input in a manner quite different from the normal Show Controller interface. This feature, called interlock, is normally used when the 35/70 projector is operated in a Master/Slave configuration or is being driven by an external bi-phase source.
  • Page 68 The four rows of the matrix are scanned by strobes from multiplexer U46 on the CPU/Main Logic card. Each column is monitored for a switch closure by the PIA, U37, on the CPU/Main Logic card. Latches U1 through U4 control the LED indicators on each key. CHRISTIE INC. - 35/70 Service/PM Manual CHRISTIE INC. - July, 1997...

  • Page 69: System Software

    The selection of an alternate film speed is an example of a change to the system state. The 35/70 software system can support extensive modifications to projector operation to enable improvements or implement diverse applications. This flexibility does not compromise system performance.
  • Page 70 Status Safety Check Douser 60 Hz Int? Keybd Change CV Char? Speed Alarms Timers Warning? Keyboard Indicate Fault Execute Set to Command Not Ready Figure 5.14: System Software Architecture CHRISTIE INC. - 35/70 Service/PM Manual CHRISTIE INC. - July, 1997...
  • Page 71 All necessary mechanical and electronic adjustments are made before the projector is shipped from the factory. Figures 4.1 and 4.2 illustrate the features of the film path side and the mechanical side, respectively, of the 35/70 Projector.
  • Page 72 BOF sensor and on the outboard side for the EOF sensor. The sensors are located just above the pulldown sprocket in the gate area. Tape should be placed on the emulsion side of the film. CHRISTIE CHRISTIE 35/70 Service/PM Manual March, 1997...
  • 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 Tape may not be seen through the film if it is placed on the base side. CHRISTIE CHRISTIE 35/70 Service/PM Manual March, 1997...
  • Page 74 Both mechanical and electrical adjustments may be required. The mechanical procedures apply to both upper and lower reels, since they are identical in adjustment and operation. The electrical adjustments are carried out using the Reverse Test Mode command for the projector. CHRISTIE CHRISTIE 35/70 Service/PM Manual March, 1997...
  • Page 75 Minor adjustments to R2, the sensor bracket, and the sensor disk may be required to obtain the correct voltage fluctuations. Do not allow the voltage fluctuation to exceed ±8V, as this may activate the torque arm limit circuit. Secure all set screws and install light cover. CHRISTIE CHRISTIE 35/70 Service/PM Manual March, 1997...
  • Page 76 Loosen the Phillips head screws holding the encoder mounting bracket to the back of the shutter motor. Enter a FORWARD command (the <FOR> key). Open the douser. Rotate the encoder by hand until the picture is ghost-free. Tighten the Phillips head screws. This completes the shutter adjustment. CHRISTIE CHRISTIE 35/70 Service/PM Manual March, 1997...
  • Page 77 If the sensor card is adjusted improperly, the pulldown gain can be too low (Figure 6.4-a), or too high (Figure 6.4-b). Either situation can cause excessive jitter. The normal pulldown sensor signal is shown in Figure 6.4-c. CHRISTIE CHRISTIE 35/70 Service/PM Manual March, 1997...
  • Page 78 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 Pulldown Signal (TP13) Figure 6.4-a: Pulldown Signal Gain Too Low Pulldown Signal (TP13) Figure 6.4-b: Pulldown Signal Gain Too High CHRISTIE CHRISTIE 35/70 Service/PM Manual March, 1997...
  • Page 79 You may have to fine-tune the adjustment to minimize the jitter. The resultant scope waveform may not conform exactly to the waveform shown in Figure 6.4-c. 7. Tighten the two screws securing the sensor card. CHRISTIE CHRISTIE 35/70 Service/PM Manual March, 1997...
  • Page 80 Pulldown Signal (TP13) 90-degree Pulldown Sensor Figure 6.6: Phase Relationship of Pulldown Quadrature Signal CHRISTIE CHRISTIE 35/70 Service/PM Manual March, 1997...

  • Page 81: Line Voltage Selection

    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 Line Voltage Selection To locate jumpers and terminals, refer to the 35/70 Power Supply component layout in Section 8.4. 2 4 0 - V A C O p e r a t i o n To configure the 35/70 projector for 240-VAC operation: Remove the jumper from terminals 1&3 and 2&4 on T1 and the jumper T1 terminals 2&3.
  • Page 82 Put the film in motion and observe the film image. Use as little pressure as possible while adjusting the set screws to adjust picture weave. Too much pressure on the edge guides distorts the film path and causes uneven focus problems. CHRISTIE CHRISTIE 35/70 Service/PM Manual March, 1997...
  • Page 83 Film Format Conversion The 35/70 projector is capable of being converted from a 35mm projector to a 70mm projector in a matter of 15 minutes. The conversion process for converting from 70mm to 35mm is as follows. (Refer to Figure 4.2 for part locations.) Insure power is turned off to the projector.

  • Page 84: Troubleshooting Guide

    Section 6 should attempt to troubleshoot or repair a problem. This section provides information for diagnosing and troubleshooting operational problems with the 35/70 projector. The projector consists of hundreds of components. It is impossible to foresee all problems that might occur. However, the procedures outlined in this section should identify the problem area.
  • Page 85 Step 6: This step is described in Section 0. Perform the Image Quality Checklist (Table 7.13). Correct deficiencies pointed to by the Image Quality Checklist Diagnostic Table (Table 7.14). CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 86 Verify Lower Constant Velocity Sprocket (19) moves freely without lateral play. Verify that Upper and Lower Sprockets move in unison. Table 7.2: Visual Checklist, Part A (Projector Film Side) CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 87 At the power supply area Checklist Step Description Completed Item Verify connectors are secured. Verify Interlock Relay is tight in its socket. Table 7.4: Visual Checklist, Part C (Power Supply Area) CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...

  • Page 88: Power-On Checklist

    Verify that the ribbon cable is not damaged and is properly inserted between the 2267 and the 1008 cards. If not, properly insert or replace cable. If failure remains, replace the 1008 card. Table 7.6: Power-On Diagnostic Table CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 89 Pulling the film loops or turning the pulldown sprocket by hand will verify the pulldown is locked. Verify that the shutter comes up to speed. Table 7.7: READY Checklist CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 90 Check the buckle switch and associated wiring. If the LED still remains lit, proceed to Step 3. The 2267 keypad or the 2293 CPU/Main Logic card could be defective. Repair or replace as necessary. Table 7.8: READY Diagnostic Table CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 91 If the LED still remains lit, the 2267 keypad or the 2293 CPU/Main Logic card could be defective. Repair or replace as necessary. Table 7.8: READY Diagnostic Table (Continued) CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 92 2285 card or READY relay. If the signal is not present, the problem could be with either the 2293 CPU/Main Logic card or the 2267 keypad card. Repair or replace as necessary. Table 7.8: READY Diagnostic Table (Continued) CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 93 The resistance of the motor (pins 3 and 4) should be about 10 ohms If problem is not resolved after steps 1 through 4, replace the 2285 card associated with the faulty system. Table 7.8: READY Diagnostic Table (Continued) CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 94 If not correct, replace the 2293 card; if voltage is correct, replace the 2275 card. Table 7.8: READY Diagnostic Table (Continued) CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 95 Loop Set will continue or complete if film loop is restarted with assist by hand. Step Diagnostic Result This indicates worn brushes in the Pulldown motor. Replace brushes or motor. Table 7.8: READY Diagnostic Table (Continued) CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 96 C8 on the 2285 card. If not, check the fuse (fuse 2), wiring, ready relay, and power supply associated with the Constant Velocity system. Repair if problem is found. Table 7.8: READY Diagnostic Table (Continued) CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 97 The fault could be associated with the tach circuit on the 2293 card. Replace 2293 card. The brushes associated with the tach on the Pulldown motor assembly could be worn. Replace brushes or motor assembly. Table 7.8: READY Diagnostic Table (Continued) CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 98 2293 card. If required, adjust R20, the phase-locked loop circuit, on the 2293 card. Note that this adjustment will have no effect if running in crystal lock mode. Table 7.8: READY Diagnostic Table (Continued) CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 99 Step Description Completed Item Verify that the film accelerates to 120 frames per second in the reverse direction in a smooth and linear motion. Table 7.9: Slew Motion Checklist CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 100 Verify that the +24VDC voltage to the associated 2285 card is at the proper value. If not, repair. If condition remains, replace the 2285 card associated with the defective system. Table 7.10: Slew Motion Diagnostic Table CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 101 Step Diagnostic Result Repeat the steps described in A-1 through A-4 of this table, using the <REV> button to initiate film motion.. Table 7.10: Slew Motion Diagnostic Table (Continued) CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 102 Verify that the douser opens when commanded and closes as the EOF tape is detected. Verify that the projector responds properly to the BOF and EOF tapes as they pass though the sensors. Table 7.11: Cine Motion Checklist CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 103 If adjustment procedure is not successful, determine the fault to be associated with the EOF/BOF sensors or the circuits on the 2293 card. Replace as required. Table 7.12: Cine Motion Diagnostic Table CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 104 2268 card. (See Section 6.5.) This condition can also occur due to worn brushes on the pulldown motor. Replace brushes or motor assembly as required. Table 7.14: Image Quality Diagnostic Table CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 105 Verify that the inner and outer race of the pulldown sprocket are not damaged and have less than 0.001" run-out. Realign or replace sprocket as necessary. Table 7.14: Image Quality Diagnostic Table (Continued) CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 106 Verify that the connections associated with the Pulldown motor are good. Replace the 2275 card. Check the brushes in the Pulldown motor. Table 7.14: Image Quality Diagnostic Table (Continued) CHRISTIE INC. - - 35/70 Service/PM Manual CHRISTIE INC. July, 1997...
  • Page 107 E L E C T R O N I C C I R C U I T I N F O R M A T I O N This section contains current data for the electronic circuits used in the 35/70 Automated Film Projector. For each circuit, the following information is included: •...
  • Page 108 READY READY (NOT READY) READY DISPLAY REEL COUNTER (READY) 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 CHRISTIE INC. - Service/PM Manual July, 1997...

  • Page 109: Brake Release

    SELECT FRAME RATES AUTO DOUSER LOAD REEL COUNTER PLATTER MODE OUTPUT CUE TAPES SHUTTER TEST REVERSE TEST MODE SHOW CONTROL ENABLE OUTPUT LOG TIMECODE INQUIRY Not used PARK ON CUE ENGAGE SOUND SOFTWARE VERSION CHRISTIE INC. - Service/PM Manual July, 1997...
  • 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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