Ryobi 680 750 Series Printing Press Service Manual PDF

Description

Ryobi 680 750 Series Printing Press Service Manual Basic Adjustment Guide PDF DOWNLOAD

Description

Ryobi 680 / 750 Series Printing Press – Official Basic Adjustment Service Manual

This is the official Ryobi factory service manual for the 680 and 750 series offset printing presses — a complete Ryobi 684 685 686 754 755 756 basic adjustment and repair guide covering every mechanical, electrical, and pneumatic adjustment procedure. Designed exclusively for qualified press technicians, this manual provides precise step-by-step adjustment instructions across all major press sections.

📋 File Details

📚 Table of Contents

Chapter 1 – Air Pressure, Lubrication & Electrical Section Adjustment

• Pump vacuum & exhaust pressure settings (680 series & 750 series)
• Lubrication and break-in procedures
• Electrical checks & adjustments:
  • Power phase & voltage values
  • RYOBI PCS-G power voltage
  • Speed setting
  • Double sheet detector sensor sensitivity
  • Slewed paper detector sensor (680 & 750 series)
  • Side lay sensor sensitivity
  • Sheet travel jam detector (standard & convertible perfector)
  • Paper detector under storage drum (750 series convertible perfector)
  • Water motor speed setting
  • RYOBI AAC aqua film sensor upper/lower limit adjustment
  • AAC setting time after initial printing start
  • Automatic control P and I fixed number setting (AAC)
  • Safety cover & safety bar micro switch operation check
  • Feeder head safety guide micro switch check

Chapter 2 – Main Section Adjustment

• Timing lists (comprehensive)
• Adjustment gauges reference
• Press drive belt tensioning (680, 754/755/756, 758P/7510P)
• Timing plate 0° setting
• Cylinder ON/OFF air cylinder adjustment
• 3-cylinder bearer clearance adjustment
• Gripper pressure & timing adjustments:
  • Impression cylinder
  • Transfer drum
  • Paper feed drum
• Plate cylinder image micro adjustment (vertical, lateral, diagonal) – straight & convertible perfector
• Encoder 0 point adjustment
• Pump belt adjustment
• Automatic blanket cleaning device – contact pressure adjustment (680 series standard, 680 series with impression pressure preset, 750 series)
• Transfer drum jacket mounting (750 series)

Chapter 3 – Plate Changer Adjustment (RPC)

• Predetermined stop position – straight & convertible perfector
• Leading edge clamp & quick tension air cylinder stroke (680 & 750 series)
• Plate pushing blade & plate holding roller air cylinder stroke
• RPC air cylinder speed adjustment
• Plate clamp pressure adjustment
• Safety cover air cylinder speed
• Full-RPC adjustments (750 series):
  • RPC adjustment mode setting
  • Sucker bar regulator
  • Speed adjustment for plate bending, sucker & release lever air cylinders
  • Plate vacuum & plate ejection detector sensors
  • Plate lateral positioning guide
  • Clearance between plate bending cover and plate cylinder
  • Plate ejection guide pressure
  • Plate cylinder leading edge clamp position
  • Sucker bar air cylinder sensor

Chapter 4 – Registration Section Adjustment

• Swing shaft start positioning
• Swing gripper base and front lay board height
• Swing gripper adjustment & timing (closing & opening)
• Front lay micro adjustment dial [0] setting
• Front lay lowering timing
• Swing shaft cam micro adjustment
• Slewed paper clutch adjustment
• Pull side guide: operation screw, timing, preset standard point positioning
• Paper drop guide adjustment (standard & 750 series cardboard up to 0.8mm)
• Paper thickness mode changeover lever proximity sensor positioning
• Pull side guide plate height (750 series thick cardboard)

Chapter 5 – Feeder Section Adjustment

• Feeder timing plate 0° adjustment
• Front fence & paper feed table adjustment
• Head cam adjustment
• Elevating & forwarding sucker positioning
• Height control foot height
• Vacuum and blower timing
• Feeder clutch OFF timing
• Feeder board tape slowdown, suction shutter, tension adjustment
• Press and feeder connection timing
• Feeder drive chain tensioning
• Proximity switch cam adjustment
• Paper feed table upper/lower limit switches (680 & 750 series)
• Paper feed table torque detector switch (680 & 750 series)
• Feeder head anti-vibration adjustment
• Roller drive tape tension for slewed paper adjustment

Chapter 6 – Delivery Section Adjustment

• CD gripper pressure & closing timing
• Delivery table limit switch adjustment
• Racking board switch adjustment
• Delivery pile top detector sensor
• Delivery paper jam detector device
• Delivery table lowering sensor OFF cam adjustment
• Delivery table lowering sensor (UV specification models)
• Powder spray device adjustment

Chapter 7 – Ink & Water Section Adjustment

• Ink & water form rollers ON/OFF air cylinder adjustment
• Ink form roller ON/OFF cam adjustment
• Water form roller ON/OFF arm adjustment
• Metering roller ON/OFF (air cylinder & section)
• Bridge roller ON/OFF air cylinder
• Roller pressure checking & adjustment:
  • Ink 1st/2nd/3rd/4th form rollers vs oscillating rollers
  • Ink form rollers vs plate
  • Ink ductor roller pressure
  • Water form roller vs oscillating roller & plate
  • Metering roller vs fountain & oscillating rollers
  • Bridge roller vs water form roller & ink 1st form roller
• Oscillating roller balance & switchback timing (straight & convertible perfector)
• Ink ductor roller contact period & stop clutch
• RYOBI AAC aqua film sensor – bracket, slide bar parallel, clearance to plate surface
• Ink fountain key 0 point adjustment
• Ink roller cleanup attachment adjustment
• Hickey picker adjustment

Chapter 8 – Convertible Perfecting Section Adjustment

• Single-diameter transfer drum gripper pressure & timing
• Double-diameter transfer drum gripper (750 series)
• Storage drum gripper pressure & timing (680 & 750 series)
• Impression cylinder gripper pressure & timing (680 & 750 series – next to turning drum)
• Turning drum gripper pressure & timing
• Paper tail edge sucker drive & switchover valve cam (680 & 750 series)
• Turning drum hook air cylinder
• Straight/perfecting printing switchover mechanism (680 & 750 series)
• Potentiometer adjustment of switchover mechanism
• Turning drum straight printing stopper
• Switchover standard position & straight printing detector sensors
• Turning drum gear positioning pin sensor
• Phase misalignment detector switch
• Storage drum back segment rotation torque & stopper air cylinder
• Paper releasing cam adjustment (perfecting condition – 680 & 750 series)
• Storage drum cam straight printing return detector switch
• Storage drum back segment max/min positioning detector sensor (750 series)
• Straight/perfecting switchover process operation checking (680 & 750 series)
• Impression cylinder jacket mounting (680 & 750 series)

Chapter 9 – Optional Accessory Devices Adjustment

• Feeder head preset standard point positioning
• Vertical guides preset standard point positioning
• Impression pressure preset standard point positioning
• Impression cylinder paper guides preset positioning
• Delivery side joggers preset standard point positioning
• Delivery back guide preset standard point positioning
• Automatic ink roller cleaning device – cleaning tank air reduction valve & spray nozzle position

Don’t let a misaligned gripper or a mistimed roller shut down your pressroom — this official 367-page Ryobi 680/750 series service manual gives you every factory adjustment procedure, timing spec, and sensor calibration you need to get back to print-perfect output. Download it instantly and put your press back in spec today.