Units performing two or more of the following functions: printing, scanning, copying, faxing

1. Scope and Applicability

This PCR covers integrated document-imaging equipment providing at least two of printing, scanning, copying and faxing, in its tested saleable factory-gate state. Physically separate components qualify only if sold as one functionally integrated device. Exclude standalone single-function equipment, loose replacement parts and printing services. The distinction follows un-cpc-3-0-structure-2025 and the historical product definition in epa-imaging-equipment-v1-2; the latter is not a claim of current certification eligibility.

The foreground route starts with purchased finished components and ends after assembly, firmware configuration, functional testing and packing. The method requires a non-overlapping bill of materials, separate test consumables, and reconciliation of rework and rejects. These requirements are specific to multifunction imaging equipment and justify a material PCR. This is a production dataset; it does not establish equal service from devices with different throughput, durability or functions.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.metal-products-machinery-and-equipment.office-accounting-and-computing-machinery.units-performing-two-or-more-of-the-following-functions-printing-scanning-copying-faxing
classification_refs	CPC 3.0: 45266; un-cpc-3-0-structure-2025
covered_products	Functionally integrated multifunction document-imaging equipment
excluded_products	Single-function standalone machines; loose parts; printing services
representative_product	Assembled multifunction printer with document scanning and copying
production_route	Purchased-component assembly, configuration, testing and packing; disclose inkjet or electrophotographic technology
market_state	Tested new device at factory gate; declared starter-cartridge and accessory configuration

3. Reference Flow

Field	Value
What	Provision of a tested multifunction document-imaging device
How much	1 kg of saleable device; disclose measured kg per device and device count
How well	Pass model-specific tests for each declared function; disclose print speed, image resolution, colour capability, media size, duplexing and connectivity
How long or cycle	One completed production cycle; no assumed service lifetime. Service comparison requires a separate declared lifetime, page workload and operating-mode schedule
reference_flow_link	reference_product; device count equals reference mass divided by measured net device mass

Field	Value
Reference amount	1
Reference product flow	Units performing two or more of the following functions: printing, scanning, copying, faxing 3389a683-0d35-45b8-8b91-25cc03fab92c
Reference flow property	Mass 93a60a56-a3c8-11da-a746-0800200b9a66
Reference unit group	Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
Reference unit	kg
Required qualifiers	model; function combination; marking technology; new or refurbished state; production site and year; device net mass; included cartridge and accessory masses; print speed; resolution; media size; colour capability; duplexing; network configuration; test acceptance criteria

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
device_mass	reference product	Mass	kg	Weigh the configured device including installed starter cartridges; exclude external packaging. Report separately any external accessories included in delivery. Do not infer mass from retail shipping weight.
electricity_units	assembly and test electricity	Net calorific value	MJ	Preserve metered electrical energy; convert kWh to MJ using 3.6. Do not treat electricity as a fuel mass or add upstream generation emissions as direct site emissions.
cartridge_balance	cartridges and test consumption	Mass	kg	Record incoming cartridge gross mass and delivered residual fill. Test ink or toner already withdrawn from those cartridges is not a second material input. Reconcile depletion, waste and delivered mass.
paper_mass	test paper	Mass	kg	Use measured paper mass or sheet count times measured sheet area times grammage. Distinguish sheets from printed sides and retain duplex information.

5. System Boundary

1. Include all site assembly and test inputs, packaging, actual rejects and attributable electricity. Require upstream datasets for every purchased component; supplier fabrication is upstream rather than an unrecorded zero burden. The BOM collection protocol defines this foreground boundary.
2. Exclude customer operation, maintenance, distribution after the gate and final device disposal from the production result. A life-cycle extension must report these modules separately with workload, lifetime, geography, operating-mode energy and cartridge replacement records; the operating-mode distinction is supported by epa-imaging-equipment-v1-2.
3. Component cards represent disjoint purchased articles. A print-engine module must exclude any housing, chassis, board, power supply or cable already entered separately. Add a separately identified atomic exchange for every additional BOM item or actual site chemical, waste or emission; the common inventory is not permission to omit site-specific exchanges.

Boundary Abstraction

Field	Value
declared_starting_condition	Purchased finished components received at the assembly site
starting_condition_role	Foreground assembly input boundary
product_classification_scope	Integrated multifunction imaging device, CPC 3.0 45266
recursive_input_rule	If a complete multifunction device enters for refurbishment, record it once as an input with prior-life burden convention; do not recursively expand identical device assembly without an explicit upstream dataset. Report refurbishment as a separate route
upstream_dataset_requirement	Supplier-specific or justified secondary datasets for components, cartridges, packaging and electricity with matching delivery state and geography
disclosure	BOM coverage; subcontracting; inbound transport treatment; device configuration; upstream dataset gaps; excluded life-cycle modules; refurbished input convention

6. Process Inventory Structure

HP’s model-specific teardown identifies the scanner assembly, case, chassis, main circuit assembly, internal cables and power supply (hp-officejet-9010-disassembly). Use it as a decomposition example, and verify the actual model BOM; it establishes neither universal materials nor mass shares.

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
assembly_test	Assembly, configuration, testing and packing	required	All covered production datasets	foreground production	1 kg saleable device

Process: Assembly, configuration, testing and packing (assembly_test)

Inputs

Product flows

ABS printer housing (housing)

Where a finished ABS housing is purchased separately; other polymers require separate specific rows.

• Selected flow: ABS printer housing
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Unit group: 93a60a57-a4c8-11da-a746-0800200c9a66
• Inclusion condition: Where a finished ABS housing is purchased separately; other polymers require separate specific rows.
• Amount rule: Net recorded exchange divided by accepted device mass for the same period; apply normalize.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg accepted configured device, excluding external packaging
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_bom

Steel printer chassis (chassis)

Where a steel chassis is purchased separately from the print engine.

• Selected flow: Steel printer chassis
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Unit group: 93a60a57-a4c8-11da-a746-0800200c9a66
• Inclusion condition: Where a steel chassis is purchased separately from the print engine.
• Amount rule: Net recorded exchange divided by accepted device mass for the same period; apply normalize.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg accepted configured device, excluding external packaging
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_bom

Populated printer control circuit board (board)

Where a populated control board is purchased separately; exclude boards embedded in recorded modules.

• Selected flow: Populated printer control circuit board
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Unit group: 93a60a57-a4c8-11da-a746-0800200c9a66
• Inclusion condition: Where a populated control board is purchased separately; exclude boards embedded in recorded modules.
• Amount rule: Net recorded exchange divided by accepted device mass for the same period; apply normalize.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg accepted configured device, excluding external packaging
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_bom

Document-scanner module (scanner)

Where a document-scanner module is installed; exclude standalone scanner devices.

• Selected flow: Document-scanner module
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Unit group: 93a60a57-a4c8-11da-a746-0800200c9a66
• Inclusion condition: Where a document-scanner module is installed; exclude standalone scanner devices.
• Amount rule: Net recorded exchange divided by accepted device mass for the same period; apply normalize.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg accepted configured device, excluding external packaging
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_bom

Printer print-engine assembly (engine)

Where a complete print-engine assembly is purchased; declare marking technology and embedded parts; do not duplicate separately recorded components.

• Selected flow: Printer print-engine assembly
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Unit group: 93a60a57-a4c8-11da-a746-0800200c9a66
• Inclusion condition: Where a complete print-engine assembly is purchased; declare marking technology and embedded parts; do not duplicate separately recorded components.
• Amount rule: Net recorded exchange divided by accepted device mass for the same period; apply normalize.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg accepted configured device, excluding external packaging
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_bom

Printer power supply unit (psu)

Where a printer power supply is purchased separately from recorded modules.

• Selected flow: Printer power supply unit
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Unit group: 93a60a57-a4c8-11da-a746-0800200c9a66
• Inclusion condition: Where a printer power supply is purchased separately from recorded modules.
• Amount rule: Net recorded exchange divided by accepted device mass for the same period; apply normalize.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg accepted configured device, excluding external packaging
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_bom

Insulated copper power cable (cable)

Where a copper power cable crosses the boundary separately; record insulation and termination state.

• Selected flow: Insulated copper power cable
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Unit group: 93a60a57-a4c8-11da-a746-0800200c9a66
• Inclusion condition: Where a copper power cable crosses the boundary separately; record insulation and termination state.
• Amount rule: Net recorded exchange divided by accepted device mass for the same period; apply normalize.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg accepted configured device, excluding external packaging
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_bom

corrugated board boxes (box)

Where a corrugated shipping box is supplied; exclude the device mass and record delivered box output separately.

• Selected flow: corrugated board boxes 4f197bec-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Unit group: 93a60a57-a4c8-11da-a746-0800200c9a66
• Inclusion condition: Where a corrugated shipping box is supplied; exclude the device mass and record delivered box output separately.
• Amount rule: Net recorded exchange divided by accepted device mass for the same period; apply normalize.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg accepted configured device, excluding external packaging
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_bom

Uncoated printing paper (paper)

Where new uncoated paper is consumed in function tests; reused originals are not repeatedly entered.

• Selected flow: Uncoated printing paper
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Unit group: 93a60a57-a4c8-11da-a746-0800200c9a66
• Inclusion condition: Where new uncoated paper is consumed in function tests; reused originals are not repeatedly entered.
• Amount rule: Net recorded exchange divided by accepted device mass for the same period; apply normalize.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg accepted configured device, excluding external packaging
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_bom

Filled black toner cartridge (toner)

Where the model uses a black toner cartridge; record gross issues and residual fill after testing; colour cartridges require individual added rows.

• Selected flow: Filled black toner cartridge
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Unit group: 93a60a57-a4c8-11da-a746-0800200c9a66
• Inclusion condition: Where the model uses a black toner cartridge; record gross issues and residual fill after testing; colour cartridges require individual added rows.
• Amount rule: Net recorded exchange divided by accepted device mass for the same period; apply normalize.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg accepted configured device, excluding external packaging
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_bom

Filled black ink cartridge (ink)

Where the model uses a black ink cartridge; record gross issues and residual fill after testing; colour cartridges require individual added rows.

• Selected flow: Filled black ink cartridge
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Unit group: 93a60a57-a4c8-11da-a746-0800200c9a66
• Inclusion condition: Where the model uses a black ink cartridge; record gross issues and residual fill after testing; colour cartridges require individual added rows.
• Amount rule: Net recorded exchange divided by accepted device mass for the same period; apply normalize.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg accepted configured device, excluding external packaging
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_bom

Electricity (electricity)

All attributable assembly, configuration, test and packing electricity, including common loads allocated by cp_energy.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value 93a60a56-a3c8-11da-a746-0800200c9a66 / MJ
• Unit group: 93a60a57-a3c8-11da-a746-0800200c9a66
• Inclusion condition: All attributable assembly, configuration, test and packing electricity, including common loads allocated by cp_energy.
• Amount rule: Net recorded exchange divided by accepted device mass for the same period; apply normalize.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg accepted configured device, excluding external packaging
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_energy

Outputs

Product flows

Units performing two or more of the following functions: printing, scanning, copying, faxing (reference_product)

Accepted configured device mass excluding external packaging; include installed cartridge residuals.

• Selected flow: Units performing two or more of the following functions: printing, scanning, copying, faxing 3389a683-0d35-45b8-8b91-25cc03fab92c
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Unit group: 93a60a57-a4c8-11da-a746-0800200c9a66
• Inclusion condition: Accepted configured device mass excluding external packaging; include installed cartridge residuals.
• Amount rule: Accepted device mass normalized to 1 kg; retain actual batch mass and count.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg accepted configured device, excluding external packaging
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_output

corrugated board boxes (delivered_box)

Delivered corrugated box mass as accompanying packaging; no co-product allocation or credit.

• Selected flow: corrugated board boxes 4f197bec-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Unit group: 93a60a57-a4c8-11da-a746-0800200c9a66
• Inclusion condition: Delivered corrugated box mass as accompanying packaging; no co-product allocation or credit.
• Amount rule: Net recorded exchange divided by accepted device mass for the same period; apply normalize.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg accepted configured device, excluding external packaging
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_output

Waste flows

Discarded printed test paper (waste_paper)

Where printed test sheets leave the site as segregated paper waste.

• Selected flow: Discarded printed test paper
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Unit group: 93a60a57-a4c8-11da-a746-0800200c9a66
• Inclusion condition: Where printed test sheets leave the site as segregated paper waste.
• Amount rule: Net recorded exchange divided by accepted device mass for the same period; apply normalize.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg accepted configured device, excluding external packaging
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_output

Discarded multifunction printer (reject)

Where a terminal rejected complete device leaves for treatment; internal repair and rework are not external waste outputs.

• Selected flow: Discarded multifunction printer
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Unit group: 93a60a57-a4c8-11da-a746-0800200c9a66
• Inclusion condition: Where a terminal rejected complete device leaves for treatment; internal repair and rework are not external waste outputs.
• Amount rule: Net recorded exchange divided by accepted device mass for the same period; apply normalize.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg accepted configured device, excluding external packaging
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_output

7. Allocation and Co-product Handling

1. Apply the BOM and meter protocol to subdivide model-specific assembly and testing before allocating common resources. Allocate shared electricity by measured station energy or documented machine-time and power observations; disclose the driver and denominator. Do not divide a device's manufacturing burden among its functions and then add it again for each function.
2. Record rejects and external waste treatment without an automatic avoided-virgin-material credit. Internal rework remains in the same batch balance; only terminal saleable output enters the normalization denominator. Report any alternative recycling allocation separately with the selected downstream method.

8. Foreground Data Collection, Calculation, and Quality Rules

Data Collection Protocols

protocol_id	process_id	flow_role	record_type	raw_fields	collection_method	unit	frequency	temporal_coverage	site_scope	aggregation_rule	quality_evidence
cp_bom	assembly_test	component, consumable and packaging exchanges	BOM and stock records	model; part number; material; quantity issued; returns; opening and closing stocks; component mass; supplier boundary; included subparts	Reconcile weighed BOM with warehouse issues and supplier invoices; retain cartridge residual-fill measurements	kg	each model and batch	Complete declared production period including rework	Assembly site and attributable subcontracted operations	Net issues divided by accepted device mass; exclude embedded duplicates	Scale calibration; BOM revision; invoices; signed stock reconciliation
cp_energy	assembly_test	electricity	submeter records	meter start and end; unit; station; model; time; grid region; voltage; shared-load allocation	Meter assembly and all function tests; document allocation where direct submetering is unavailable	MJ or kWh	each batch or shift	Same period as accepted output	Assembly and test stations plus attributable common loads	Sum allocated energy divided by accepted device mass	Meter calibration and station-time logs
cp_output	assembly_test	saleable device and waste	acceptance and waste records	serial count; configured net mass; tested functions; failed count; rework transfers; waste type and mass; destination	Weigh accepted devices and separate waste consignments; reconcile acceptance logs and waste transfer records	kg	each batch and consignment	Same period as input records	Assembly site gate	Sum terminal outputs by exchange; normalize by accepted device mass	Test reports; weighbridge tickets; waste manifests; mass reconciliation

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
normalize	inventory	q_i = period net exchange_i / period accepted net device mass; exclude recovered internal rework from terminal outputs	cp_bom; cp_energy; cp_output	kg or MJ per kg device
device_conversion	count reporting	device count = accepted device mass / measured configured mass per device; separate models before averaging	cp_output	count accompanying mass-based dataset
mass_reconcile	material balance	Opening stock + receipts = closing stock + accepted device mass + external packaging output + waste outputs + documented losses; avoid counting embedded cartridges twice	cp_bom; cp_output	Signed balance with investigated discrepancy

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
configuration	reference product	Document each supported function and test outcome; retain model, technology and installed options	Product specification and acceptance test records; epa-imaging-equipment-v1-2
completeness	inventory	Reconcile complete disjoint BOM and waste ledger. Record any additional material as an individual exchange; missing data must not become a zero	cp_bom and cp_output
representation	upstream and energy	Record data year, geography, technology, supplier state, allocation and dataset boundary; explain substitutions	Supplier and meter records
uncertainty	amounts	Use foreground uncertainty and measured variability; do not infer an empirical range from one device or from an energy-efficiency limit	Calibration records, batch variability and uncertainty disclosure

9. Validation Rules

1. Reject a reference definition missing its function combination, device configuration or kg-per-device conversion. Confirm that the selected device satisfies at least two functions under un-cpc-3-0-structure-2025.
2. Check complete BOM coverage, absence of duplicated subassemblies, cartridge depletion balance, positive accepted output and reconciliation of rework. Investigate balance residuals against documented measurement uncertainty; no arbitrary percentage tolerance is prescribed.
3. Require each inventory row's flow type, property and unit to agree with its selected identity. Missing flow identity or upstream dataset coverage must be disclosed and resolved before claiming complete database-linked coverage.
4. Check that all records share the declared production period and boundary; factory-gate results must not be advertised as whole-life or equal-service comparisons without the separate service scenario.

10. Published Dataset Profile

Field	Value
dataset_role	secondary_dataset
downstream_use	background_dataset for configured multifunction-device supply; process and lifecyclemodel projections of the foreground data package
allowed_use	Factory-gate production modelling with compatible device configuration and upstream coverage
excluded_use	Whole-life environmental claims without use and end-of-life modules; automatic function-by-function comparison; single-function machine substitution
required_metadata	model; functions; technology; kg per device; cartridge configuration; site; year; BOM coverage; allocation; upstream dataset links
required_quality_disclosure	missing flows; unresolved identities; meter coverage; uncertainty; upstream proxies; exclusions; material balance
update_trigger	BOM, technology, site, electricity mix, cartridge configuration or test-protocol change

11. Data Sources

Source id	Type	Reference	Used for
un-cpc-3-0-structure-2025	official_guidance	United Nations, CPC Version 3.0 structure, 30 June 2025; https://unstats.un.org/unsd/classifications/Econ/Download/In%20Text/CPC_Ver_3.0_Structure_30Jun2025.csv ; retrieved 2026-09-09	Verified row 45266; classification identity and scope
epa-imaging-equipment-v1-2	standard	US EPA, ENERGY STAR Product Specification for Imaging Equipment, Version 1.2, definition 1.A.5 and operating-mode definitions; https://www.energystar.gov/sites/default/files/Imaging_Equipment_Program_Requirements%20v1_2.pdf ; retrieved 2026-09-09	Historical functional-integration definition and operating-mode distinctions; no current certification claim or empirical amount range
hp-officejet-9010-disassembly	handbook	HP, Product End-of-Life Disassembly Instructions, OfficeJet Pro 9010 and Premier/9019, document c07585754, sections 1 and 3; https://www8.hp.com/h20195/v2/GetDocument.aspx?docname=c07585754 ; retrieved 2026-09-09	Verified component locations and disassembly sequence support illustrative scanner, chassis, board, cartridge and power-supply decomposition; model-specific quantities are not category amounts