Hardware Maintenance Manual
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...to-FRU index 36 Numeric error codes 36 Error messages 41 Beep symptoms 42 © Copyright Lenovo 2007, 2011 No-beep symptoms 42 LCD-related symptoms 43 Intermittent problems 43 Undetermined problems 44 ThinkPad T61, R61, and R61i (14.1-inch widescreen 45 Specifications 45 Status indicators 49 FRU tests 52 Fn... (MDC-1.5) . . . . 71 1080 PCI Express Mini Card for wireless LAN . . 73 1090 PCI Express Mini Card for wireless WAN or Intel Turbo Memory Mini Card 75 1100 SIM card slot 77 1110 Backup battery 79 1120 Keyboard bezel 80 1130 Speaker assembly 82 1140 Fan assembly 84 1150...
...to-FRU index 36 Numeric error codes 36 Error messages 41 Beep symptoms 42 © Copyright Lenovo 2007, 2011 No-beep symptoms 42 LCD-related symptoms 43 Intermittent problems 43 Undetermined problems 44 ThinkPad T61, R61, and R61i (14.1-inch widescreen 45 Specifications 45 Status indicators 49 FRU tests 52 Fn... (MDC-1.5) . . . . 71 1080 PCI Express Mini Card for wireless LAN . . 73 1090 PCI Express Mini Card for wireless WAN or Intel Turbo Memory Mini Card 75 1100 SIM card slot 77 1110 Backup battery 79 1120 Keyboard bezel 80 1130 Speaker assembly 82 1140 Fan assembly 84 1150...
Hardware Maintenance Manual
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..."CTO" (Example: 1829-CTO). Again, CMVs are custom models and are hard disk drives, system boards, microprocessors, Liquid Crystal Displays (LCDs), and memory. Also, PEW, eSupport, and the HMM will be returned in the PEW record under the same fixed model number. Therefore, it is the 4-digit... The PEW record is NOT generally announced. An example of the machine label is a unique configuration that has been negotiated between IBM or Lenovo and the customer. Business Partners will enter Loc ID, MT and Serial, and the key commodities will access PEW when performing Entitlement Lookup....
..."CTO" (Example: 1829-CTO). Again, CMVs are custom models and are hard disk drives, system boards, microprocessors, Liquid Crystal Displays (LCDs), and memory. Also, PEW, eSupport, and the HMM will be returned in the PEW record under the same fixed model number. Therefore, it is the 4-digit... The PEW record is NOT generally announced. An example of the machine label is a unique configuration that has been negotiated between IBM or Lenovo and the customer. Business Partners will enter Loc ID, MT and Serial, and the key commodities will access PEW when performing Entitlement Lookup....
Hardware Maintenance Manual
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...drive, system board, microprocessor, LCD, and memory) v eSupport can be used to view the complete list of Hazardous Substances in Electrical and Electronic Equipment Directive (2002/95/EC) is the same record found in 2005 and 2006, will be used. 18 ThinkPad T61, R61, and R61i (14.1-inch widescreen) ... to PEW and eSupport to view the list of service parts by Document Type" select PARTS INFORMATION. The following Web site: http://www.lenovo.com/ support v To view the key commodities, click on the market before the implementation date and expects its suppliers to view the complete...
...drive, system board, microprocessor, LCD, and memory) v eSupport can be used to view the complete list of Hazardous Substances in Electrical and Electronic Equipment Directive (2002/95/EC) is the same record found in 2005 and 2006, will be used. 18 ThinkPad T61, R61, and R61i (14.1-inch widescreen) ... to PEW and eSupport to view the list of service parts by Document Type" select PARTS INFORMATION. The following Web site: http://www.lenovo.com/ support v To view the key commodities, click on the market before the implementation date and expects its suppliers to view the complete...
Hardware Maintenance Manual
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... All Rights Reserved. Use the cursor keys and ESC to select. Follow the instructions on the ThinkPad computer. Press ENTER to move in menus. Full v Memory Test - otherwise, it before running PC-Doctor for at least 2 seconds; Some unsupported device... CPU/Coprocessor v Systemboard v Video Adapter v Serial Ports v Parallel Ports v Fixed Disks v Diskette Drives v Other Devices v ThinkPad Devices v Communication v Wireless LAN v Memory Test - Full Memory Test - On the first screen, select the model and press Enter. Select Diagnostics with the arrow keys, and press Enter....
... All Rights Reserved. Use the cursor keys and ESC to select. Follow the instructions on the ThinkPad computer. Press ENTER to move in menus. Full v Memory Test - otherwise, it before running PC-Doctor for at least 2 seconds; Some unsupported device... CPU/Coprocessor v Systemboard v Video Adapter v Serial Ports v Parallel Ports v Fixed Disks v Diskette Drives v Other Devices v ThinkPad Devices v Communication v Wireless LAN v Memory Test - Full Memory Test - On the first screen, select the model and press Enter. Select Diagnostics with the arrow keys, and press Enter....
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... the test, click "Run Diagnostics" on the Rescue and Recovery main screen. 26 ThinkPad T61, R61, and R61i (14.1-inch widescreen) Hardware Maintenance Manual Exit Diag. To cancel...information with PC-Doctor PC-Doctor can detect the following system information: Hardware Info v System Configuration v Memory Contents v Physical Disk Drives v Logical Disk Drives v VGA Information v IDE Drive Info v PCI Information...symptoms and solutions: v Check System Health v System and Device Tests v Lenovo Troubleshooting Center v System Reports v Updates and Support PC-Doctor for Windows This product is a...
... the test, click "Run Diagnostics" on the Rescue and Recovery main screen. 26 ThinkPad T61, R61, and R61i (14.1-inch widescreen) Hardware Maintenance Manual Exit Diag. To cancel...information with PC-Doctor PC-Doctor can detect the following system information: Hardware Info v System Configuration v Memory Contents v Physical Disk Drives v Logical Disk Drives v VGA Information v IDE Drive Info v PCI Information...symptoms and solutions: v Check System Health v System and Device Tests v Lenovo Troubleshooting Center v System Reports v Updates and Support PC-Doctor for Windows This product is a...
Hardware Maintenance Manual
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...disk drive. System board. System board. 1802 Unauthorized network card is plugged in the primary bay the customer is available at http://www.lenovo.com/support 2100 Initialization error on HDD1 (Ultrabay hard 2. System board. 1805 Unauthorized Wireless USB card is plugged in the primary drive bay...to Slot-0 or the lower slot. Do not apply any physical shock to the ThinkPad computer. 2. If in -Turn off and remove all but the reader that you set up for the authentication. 1830 Invalid memory configuration-Power off and remove the Wireless USB card. 1. Reseat the hard disk ...
...disk drive. System board. System board. 1802 Unauthorized network card is plugged in the primary bay the customer is available at http://www.lenovo.com/support 2100 Initialization error on HDD1 (Ultrabay hard 2. System board. 1805 Unauthorized Wireless USB card is plugged in the primary drive bay...to Slot-0 or the lower slot. Do not apply any physical shock to the ThinkPad computer. 2. If in -Turn off and remove all but the reader that you set up for the authentication. 1830 Invalid memory configuration-Power off and remove the Wireless USB card. 1. Reseat the hard disk ...
Hardware Maintenance Manual
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.... Hibernation error. Load "Setup Defaults" in the BIOS Setup Utility. 2. Backup battery. 3. System board. 1. DIMM. 2. System board. 1. Restore the system configuration to boot from. 2. If memory size has been changed, re-create the hibernation file. 1. System board. System board. The device you want to boot from . No valid operating system. 1. Check...
.... Hibernation error. Load "Setup Defaults" in the BIOS Setup Utility. 2. Backup battery. 3. System board. 1. DIMM. 2. System board. 1. Restore the system configuration to boot from. 2. If memory size has been changed, re-create the hibernation file. 1. System board. System board. The device you want to boot from . No valid operating system. 1. Check...
Hardware Maintenance Manual
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CMOS RAM v 242 bytes 46 ThinkPad T61, R61, and R61i (14.1-inch widescreen) Hardware Maintenance Manual Table 7. Specifications (continued... v 667-MHz PSB v 667-MHz DDR2 SDRAM (PC2-5300) v PCI bus v PCI Express bus v DMI Graphic memory chip v Intel PM965/GM965 graphics Display v 15.4-inch, 16M colors, WXGA (1280 × 800 resolution) TFT color LCD...to the limitation of the current 32-bit PC architecture, actual usable memory size is limited to 3 GB even though the physical installable memory size is 4 GB in ThinkPad T61, R61, and R61i (14.1-inch widescreen) (14.1-inch widescreen) computers...
CMOS RAM v 242 bytes 46 ThinkPad T61, R61, and R61i (14.1-inch widescreen) Hardware Maintenance Manual Table 7. Specifications (continued... v 667-MHz PSB v 667-MHz DDR2 SDRAM (PC2-5300) v PCI bus v PCI Express bus v DMI Graphic memory chip v Intel PM965/GM965 graphics Display v 15.4-inch, 16M colors, WXGA (1280 × 800 resolution) TFT color LCD...to the limitation of the current 32-bit PC architecture, actual usable memory size is limited to 3 GB even though the physical installable memory size is 4 GB in ThinkPad T61, R61, and R61i (14.1-inch widescreen) (14.1-inch widescreen) computers...
Hardware Maintenance Manual
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...the other one of them and run Diagnostics --> Memory Test-Full. This symptom is necessary. If enabling the Touch Pad does not correct the problem, continue with the following : v Interactive Tests --> Mouse ThinkPad T61, R61, and R61i (14.1-inch widescreen) 53... Interactive Tests --> Optical Drive Test Memory 1. Diagnostics --> Other Devices--> Optical Drive 2. Run Diagnostics --> ThinkPad Devices --> Fan. If the Touch Pad is disabled, select Automatic...
...the other one of them and run Diagnostics --> Memory Test-Full. This symptom is necessary. If enabling the Touch Pad does not correct the problem, continue with the following : v Interactive Tests --> Mouse ThinkPad T61, R61, and R61i (14.1-inch widescreen) 53... Interactive Tests --> Optical Drive Test Memory 1. Diagnostics --> Other Devices--> Optical Drive 2. Run Diagnostics --> ThinkPad Devices --> Fan. If the Touch Pad is disabled, select Automatic...
Hardware Maintenance Manual
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1090 PCI Express Mini Card for wireless WAN or Intel Turbo Memory mini card 1 ThinkPad T61, R61, and R61i (14.1-inch widescreen) 75 Removal steps of PCI express mini card for wireless WAN or Intel Turbo Memory Mini Card For access, remove these FRUs in order: v "1010 Battery pack" on page 61 v "1040 Palm rest or palm rest with fingerprint reader" on page 65 v "1060 Keyboard" on page 69 Table 19.
1090 PCI Express Mini Card for wireless WAN or Intel Turbo Memory mini card 1 ThinkPad T61, R61, and R61i (14.1-inch widescreen) 75 Removal steps of PCI express mini card for wireless WAN or Intel Turbo Memory Mini Card For access, remove these FRUs in order: v "1010 Battery pack" on page 61 v "1040 Palm rest or palm rest with fingerprint reader" on page 65 v "1060 Keyboard" on page 69 Table 19.
Hardware Maintenance Manual
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...3 3 2 Step 3 Screw (quantity) M2 × 3 mm, small-head, nylon-coated (2) Color Silver Torque 0.167 Nm (1.7 kgfcm) When installing: In models with the Intel Turbo Memory Mini Card, skip step 2 . For the models with the PCI Express Mini Card for wireless WAN. Table 19. In step 2 , unplug the jacks by using... WAN or Intel Turbo Memory mini card (continued) Note: Step 2 is only for the models with the PCI Express Mini Card for wireless WAN, plug the red cable into the jack labeled MAIN on the card, and the blue cable into the jack labeled AUX. 4 76 ThinkPad T61, R61, and R61i ...
...3 3 2 Step 3 Screw (quantity) M2 × 3 mm, small-head, nylon-coated (2) Color Silver Torque 0.167 Nm (1.7 kgfcm) When installing: In models with the Intel Turbo Memory Mini Card, skip step 2 . For the models with the PCI Express Mini Card for wireless WAN. Table 19. In step 2 , unplug the jacks by using... WAN or Intel Turbo Memory mini card (continued) Note: Step 2 is only for the models with the PCI Express Mini Card for wireless WAN, plug the red cable into the jack labeled MAIN on the card, and the blue cable into the jack labeled AUX. 4 76 ThinkPad T61, R61, and R61i ...
Hardware Maintenance Manual
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Removal steps of LCD assembly 1 1 Step 1 Screw (quantity) Color M2.5 × 6.5 mm, flat-head, nylon-coated (2) Black Torque 0.392 Nm (4.0 kgfcm) 90 ThinkPad T61, R61, and R61i (14.1-inch widescreen) Hardware Maintenance Manual 1160 LCD assembly For access, remove these FRUs in order: v "1010 Battery pack" on page 61 v "..." on page 69 v "1080 PCI Express Mini Card for wireless LAN" on page 73 v "1090 PCI Express Mini Card for wireless WAN or Intel Turbo Memory Mini Card" on page 75 v "1120 Keyboard bezel" on page 80 Table 26.
Removal steps of LCD assembly 1 1 Step 1 Screw (quantity) Color M2.5 × 6.5 mm, flat-head, nylon-coated (2) Black Torque 0.392 Nm (4.0 kgfcm) 90 ThinkPad T61, R61, and R61i (14.1-inch widescreen) Hardware Maintenance Manual 1160 LCD assembly For access, remove these FRUs in order: v "1010 Battery pack" on page 61 v "..." on page 69 v "1080 PCI Express Mini Card for wireless LAN" on page 73 v "1090 PCI Express Mini Card for wireless WAN or Intel Turbo Memory Mini Card" on page 75 v "1120 Keyboard bezel" on page 80 Table 26.
Hardware Maintenance Manual
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..." on page 69 v "1080 PCI Express Mini Card for wireless LAN" on page 73 v "1090 PCI Express Mini Card for wireless WAN or Intel Turbo Memory Mini Card" on page 75 v "1120 Keyboard bezel" on page 80 v "1160 LCD assembly" on page 61 v "1040 Palm rest or palm rest with cable... (2) Black For R61 M2 × 17 mm, flat-head, nylon-coated (2) Black Torque 0.167 Nm (1.7 kgfcm) 0.167 Nm (1.7 kgfcm) 0.167 Nm (1.7 kgfcm) 0.167 Nm (1.7 kgfcm) ThinkPad T61, R61, and R61i (14.1-inch widescreen) 93 1170 Base cover, USB sub card with cable, and PC Card slots bezel assembly For access, remove these...
..." on page 69 v "1080 PCI Express Mini Card for wireless LAN" on page 73 v "1090 PCI Express Mini Card for wireless WAN or Intel Turbo Memory Mini Card" on page 75 v "1120 Keyboard bezel" on page 80 v "1160 LCD assembly" on page 61 v "1040 Palm rest or palm rest with cable... (2) Black For R61 M2 × 17 mm, flat-head, nylon-coated (2) Black Torque 0.167 Nm (1.7 kgfcm) 0.167 Nm (1.7 kgfcm) 0.167 Nm (1.7 kgfcm) 0.167 Nm (1.7 kgfcm) ThinkPad T61, R61, and R61i (14.1-inch widescreen) 93 1170 Base cover, USB sub card with cable, and PC Card slots bezel assembly For access, remove these...
Hardware Maintenance Manual
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Removal steps of structure frame 1 Step 1 Screw (quantity) M2 × 3 mm, flat-head, nylon-coated (1) Color Silver Torque 0.167 Nm (1.7 kgfcm) ThinkPad T61, R61, and R61i (14.1-inch widescreen) 99 1180 Structure frame For access, remove these FRUs, in order: v "1010 Battery pack" on page 61 v "1020 Ultrabay ...-1.5)" on page 71 v "1080 PCI Express Mini Card for wireless LAN" on page 73 v "1090 PCI Express Mini Card for wireless WAN or Intel Turbo Memory Mini Card" on page 75 v "1120 Keyboard bezel" on page 80 v "1140 Fan assembly" on page 84 v "1160 LCD assembly" on page 90 v "1170 Base...
Removal steps of structure frame 1 Step 1 Screw (quantity) M2 × 3 mm, flat-head, nylon-coated (1) Color Silver Torque 0.167 Nm (1.7 kgfcm) ThinkPad T61, R61, and R61i (14.1-inch widescreen) 99 1180 Structure frame For access, remove these FRUs, in order: v "1010 Battery pack" on page 61 v "1020 Ultrabay ...-1.5)" on page 71 v "1080 PCI Express Mini Card for wireless LAN" on page 73 v "1090 PCI Express Mini Card for wireless WAN or Intel Turbo Memory Mini Card" on page 75 v "1120 Keyboard bezel" on page 80 v "1140 Fan assembly" on page 84 v "1160 LCD assembly" on page 90 v "1170 Base...
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..." on page 73 v "1090 PCI Express Mini Card for the HDD Active Protection System™ f Security chip b a c d f e 104 ThinkPad T61, R61, and R61i (14.1-inch widescreen) Hardware Maintenance Manual For access, remove these FRUs, in -1 media reader slot assembly Following components soldered on page... 99 Table 29. Removal steps of rough handling. a CPU b Video chip c MCH (Memory Controller Hub) d ICH (I/O Controller Hub) e Accelerometer chip for wireless WAN or Intel Turbo Memory Mini Card" on page 75 v "1100 SIM card slot" on page 77 v "1110 Backup battery...
..." on page 73 v "1090 PCI Express Mini Card for the HDD Active Protection System™ f Security chip b a c d f e 104 ThinkPad T61, R61, and R61i (14.1-inch widescreen) Hardware Maintenance Manual For access, remove these FRUs, in -1 media reader slot assembly Following components soldered on page... 99 Table 29. Removal steps of rough handling. a CPU b Video chip c MCH (Memory Controller Hub) d ICH (I/O Controller Hub) e Accelerometer chip for wireless WAN or Intel Turbo Memory Mini Card" on page 75 v "1100 SIM card slot" on page 77 v "1110 Backup battery...
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... (6) Color Black Torque 0.167 Nm (1.7 kgfcm) When installing: As you route the cables, make sure that they are not subjected to be broken. 2 2 2 2 2 112 ThinkPad T61, R61, and R61i (14.1-inch widescreen) Hardware Maintenance Manual The blank cover of antenna assembly Note: The red cable is the wireless WAN antenna cable..." on page 69 v "1080 PCI Express Mini Card for wireless LAN" on page 73 v "1090 PCI Express Mini Card for wireless WAN or Intel Turbo Memory Mini Card" on page 75 v "1120 Keyboard bezel" on page 80 v "1160 LCD assembly" on page 90 v "2010 LCD front bezel and LCD rear...
... (6) Color Black Torque 0.167 Nm (1.7 kgfcm) When installing: As you route the cables, make sure that they are not subjected to be broken. 2 2 2 2 2 112 ThinkPad T61, R61, and R61i (14.1-inch widescreen) Hardware Maintenance Manual The blank cover of antenna assembly Note: The red cable is the wireless WAN antenna cable..." on page 69 v "1080 PCI Express Mini Card for wireless LAN" on page 73 v "1090 PCI Express Mini Card for wireless WAN or Intel Turbo Memory Mini Card" on page 75 v "1120 Keyboard bezel" on page 80 v "1160 LCD assembly" on page 90 v "2010 LCD front bezel and LCD rear...
Hardware Maintenance Manual
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... assembly, and integrated camera 2 1 1 1 1 Step 1 Screw (quantity) M2.5 × 4 mm, flat-head, nylon-coated (4) Color Black Torque 0.392 Nm (4.0 kgfcm) 114 ThinkPad T61, R61, and R61i (14.1-inch widescreen) Hardware Maintenance Manual 2050 LCD magnesium frame, hinge assembly, and integrated camera For access, remove these FRUs in order...page 69 v "1080 PCI Express Mini Card for wireless LAN" on page 73 v "1090 PCI Express Mini Card for wireless WAN or Intel Turbo Memory Mini Card" on page 75 v "1120 Keyboard bezel" on page 80 v "1160 LCD assembly" on page 90 v "2010 LCD front bezel and...
... assembly, and integrated camera 2 1 1 1 1 Step 1 Screw (quantity) M2.5 × 4 mm, flat-head, nylon-coated (4) Color Black Torque 0.392 Nm (4.0 kgfcm) 114 ThinkPad T61, R61, and R61i (14.1-inch widescreen) Hardware Maintenance Manual 2050 LCD magnesium frame, hinge assembly, and integrated camera For access, remove these FRUs in order...page 69 v "1080 PCI Express Mini Card for wireless LAN" on page 73 v "1090 PCI Express Mini Card for wireless WAN or Intel Turbo Memory Mini Card" on page 75 v "1120 Keyboard bezel" on page 80 v "1160 LCD assembly" on page 90 v "2010 LCD front bezel and...
Hardware Maintenance Manual
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ThinkPad T61, R61, and R61i (14.1-inch widescreen) 117 Removal steps of LCD panel and LCD cable 3 1 2 4 1 1 2 1 Step 4 Screw (quantity) M2 × 2.8 mm, flat-head, nylon-coated (4) ..." on page 69 v "1080 PCI Express Mini Card for wireless LAN" on page 73 v "1090 PCI Express Mini Card for wireless WAN or Intel Turbo Memory Mini Card" on page 75 v "1120 Keyboard bezel" on page 80 v "1160 LCD assembly" on page 90 v "2010 LCD front bezel and LCD rear cover...
ThinkPad T61, R61, and R61i (14.1-inch widescreen) 117 Removal steps of LCD panel and LCD cable 3 1 2 4 1 1 2 1 Step 4 Screw (quantity) M2 × 2.8 mm, flat-head, nylon-coated (4) ..." on page 69 v "1080 PCI Express Mini Card for wireless LAN" on page 73 v "1090 PCI Express Mini Card for wireless WAN or Intel Turbo Memory Mini Card" on page 75 v "1120 Keyboard bezel" on page 80 v "1160 LCD assembly" on page 90 v "2010 LCD front bezel and LCD rear cover...
Hardware Maintenance Manual
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...latches These CRUs have a latch to help you to remove and replace the part. v A CRU (customer replaceable unit) is identified by an R. ThinkPad T61, R61, and R61i (14.1-inch widescreen) 121 v A RoHS compliant FRU is identified by an access panel that are accessible only by either one ... product itself) These CRUs are concealed by a single asterisk (*) or two asterisks (**) in U. Examples of these types of CRUs include a memory card and a hard disk drive. Parts list This section contains following types of the external CRUs: External CRUs (pluggable) These CRUs unplug from...
...latches These CRUs have a latch to help you to remove and replace the part. v A CRU (customer replaceable unit) is identified by an R. ThinkPad T61, R61, and R61i (14.1-inch widescreen) 121 v A RoHS compliant FRU is identified by an access panel that are accessible only by either one ... product itself) These CRUs are concealed by a single asterisk (*) or two asterisks (**) in U. Examples of these types of CRUs include a memory card and a hard disk drive. Parts list This section contains following types of the external CRUs: External CRUs (pluggable) These CRUs unplug from...
Hardware Maintenance Manual
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Table 36. Parts list-Overall (continued) No. FRU FRU no. 24 Intel Turbo Memory 1GB 42T0907 v 6378-CTO v 6379-CTO v 6480-CTO v 7658-CTO, 17x, X3x ... P2x, P3x, P5x, P6x, P7x, P8x, P9x, PBx, PCx, PDx, PEx, PGx, PJx, REx, RFx, RHx, RJx, RTx v 7664-CTO, 16x, 17x, 1Jx, 1Lx, 1Nx, P4x, R4x v 7665-CTO, P3x v 7732-CTO, X3x, P1x v 7733-CTO, P4x v 7734...-CTO v 6377-CTO v 6481-all v 7662-all v 7663-all v 7664-all v 7665-all Toshiba 42W2462 Furukawa 44C0557 RoHS CRU ID ID R ** R N R N R N R N 196 ThinkPad T61, R61, and R61i (14.1-inch widescreen) Hardware Maintenance Manual
Table 36. Parts list-Overall (continued) No. FRU FRU no. 24 Intel Turbo Memory 1GB 42T0907 v 6378-CTO v 6379-CTO v 6480-CTO v 7658-CTO, 17x, X3x ... P2x, P3x, P5x, P6x, P7x, P8x, P9x, PBx, PCx, PDx, PEx, PGx, PJx, REx, RFx, RHx, RJx, RTx v 7664-CTO, 16x, 17x, 1Jx, 1Lx, 1Nx, P4x, R4x v 7665-CTO, P3x v 7732-CTO, X3x, P1x v 7733-CTO, P4x v 7734...-CTO v 6377-CTO v 6481-all v 7662-all v 7663-all v 7664-all v 7665-all Toshiba 42W2462 Furukawa 44C0557 RoHS CRU ID ID R ** R N R N R N R N 196 ThinkPad T61, R61, and R61i (14.1-inch widescreen) Hardware Maintenance Manual