AI4AVSummary
RS-232C control protocol for Christie LX-series projectors. Commands are ASCII strings starting with C (execution) or CR (status read), terminated by 0x0D carriage return. Source document is the "LX700 RS232 Codes — Basic Technical Reference" (Rev. 1, 11/08); command set is treated as applicable to the LX1000/900/1200/LW600 family per the family-level spec.
Transport
protocols:
- serial
serial:
baud_rate: 19200 # source: "initial setting value is 19200" (9600 also supported, changeable in service mode)
data_bits: 8
parity: none
stop_bits: 1
flow_control: none
auth:
type: none # inferred: no auth procedure in source
Traits
- powerable # inferred: POWER ON / POWER OFF commands present (C00, C01, C02)
- routable # inferred: INPUT selection commands present (C05-C08, C23-C25, C33-C35, C50-C53)
- queryable # inferred: Status Read Commands present (CR0-CR7)
- levelable # inferred: VOLUME +/-, BRIGHTNESS +/-, ZOOM +/-, FOCUS +/- present
Actions
- id: power_on
label: Power ON
kind: action
command: "C00" # ASCII, terminated by 0x0D
params: []
- id: power_off_quick
label: Power OFF (Quick)
kind: action
command: "C01"
params: []
- id: power_off
label: Power OFF
kind: action
command: "C02"
params: []
- id: input_1
label: INPUT 1
kind: action
command: "C05"
params: []
- id: input_2
label: INPUT 2
kind: action
command: "C06"
params: []
- id: input_3
label: INPUT 3
kind: action
command: "C07"
params: []
- id: input_network
label: NETWORK
kind: action
command: "C08"
params: []
- id: volume_up
label: Volume Up
kind: action
command: "C09"
params: []
- id: volume_down
label: Volume Down
kind: action
command: "C0A"
params: []
- id: sound_mute_on
label: Sound Mute On
kind: action
command: "C0B"
params: []
- id: sound_mute_off
label: Sound Mute Off
kind: action
command: "C0C"
params: []
- id: video_mute_on
label: Video Mute On
kind: action
command: "C0D"
params: []
- id: video_mute_off
label: Video Mute Off
kind: action
command: "C0E"
params: []
- id: screen_normal_size
label: Screen Normal Size (4:3)
kind: action
command: "C0F"
params: []
- id: screen_wide_size
label: Screen Wide Size (16:9)
kind: action
command: "C10"
params: []
- id: menu_on
label: Menu On
kind: action
command: "C1C"
params: []
- id: menu_off
label: Menu Off
kind: action
command: "C1D"
params: []
- id: display_clear
label: Display Clear
kind: action
command: "C1E"
params: []
- id: brightness_up
label: Brightness +
kind: action
command: "C20"
params: []
- id: brightness_down
label: Brightness -
kind: action
command: "C21"
params: []
- id: input_2_video
label: Input 2 Video
kind: action
command: "C23"
params: []
- id: input_2_yuv
label: Input 2 Y,Pb/Cb,Pr/Cr
kind: action
command: "C24"
params: []
- id: input_2_rgb
label: Input 2 RGB
kind: action
command: "C25"
params: []
- id: image
label: Image
kind: action
command: "C27"
params: []
- id: on_start_enable
label: On Start Enable
kind: action
command: "C28"
params: []
- id: on_start_disable
label: On Start Disable
kind: action
command: "C29"
params: []
- id: power_management_ready
label: Power Management Ready
kind: action
command: "C2A"
params: []
- id: power_management_off
label: Power Management Off
kind: action
command: "C2B"
params: []
- id: power_management_shutdown
label: Power Management Shutdown
kind: action
command: "C2E"
params: []
- id: dzoom_up
label: D.Zoom +
kind: action
command: "C30"
params: []
- id: dzoom_down
label: D.Zoom -
kind: action
command: "C31"
params: []
- id: input_3_video
label: Input 3 Video
kind: action
command: "C33"
params: []
- id: input_3_svideo
label: Input 3 S-Video
kind: action
command: "C34"
params: []
- id: input_3_yuv
label: Input 3 Y,Pb/Cb,Pr/Cr
kind: action
command: "C35"
params: []
- id: pointer_right
label: Pointer Right
kind: action
command: "C3A"
params: []
- id: pointer_left
label: Pointer Left
kind: action
command: "C3B"
params: []
- id: pointer_up
label: Pointer Up
kind: action
command: "C3C"
params: []
- id: pointer_down
label: Pointer Down
kind: action
command: "C3D"
params: []
- id: enter
label: Enter
kind: action
command: "C3F"
params: []
- id: freeze_on
label: Freeze On
kind: action
command: "C43"
params: []
- id: freeze_off
label: Freeze Off
kind: action
command: "C44"
params: []
- id: zoom_down
label: Zoom -
kind: action
command: "C46"
params: []
- id: zoom_up
label: Zoom +
kind: action
command: "C47"
params: []
- id: focus_down
label: Focus -
kind: action
command: "C4A"
params: []
- id: focus_up
label: Focus +
kind: action
command: "C4B"
params: []
- id: color_management
label: Color Management
kind: action
command: "C4E"
params: []
- id: input_1_analog_rgb
label: Input 1 Analog RGB
kind: action
command: "C50"
params: []
- id: input_1_scart
label: Input 1 SCART
kind: action
command: "C51"
params: []
- id: input_1_dvi_pc
label: Input 1 DVI (PC Digital)
kind: action
command: "C52"
params: []
- id: input_1_dvi_hdcp
label: Input 1 DVI (AV HDCP)
kind: action
command: "C53"
params: []
- id: lens_shift_up
label: Lens Shift Up
kind: action
command: "C5D"
params: []
- id: lens_shift_down
label: Lens Shift Down
kind: action
command: "C5E"
params: []
- id: lens_shift_left
label: Lens Shift Left
kind: action
command: "C5F"
params: []
- id: lens_shift_right
label: Lens Shift Right
kind: action
command: "C60"
params: []
- id: auto_pc_adj
label: Auto PC Adj.
kind: action
command: "C89"
params: []
- id: presentation_timer
label: Presentation Timer
kind: action
command: "C8A"
params: []
- id: keystone_upper
label: Keystone (reduce upper part)
kind: action
command: "C8E"
params: []
- id: keystone_lower
label: Keystone (reduce lower part)
kind: action
command: "C8F"
params: []
- id: keystone_right
label: Keystone (reduce right side)
kind: action
command: "C90"
params: []
- id: keystone_left
label: Keystone (reduce left side)
kind: action
command: "C91"
params: []
- id: status_read
label: Status Read
kind: query
command: "CR0"
params: []
- id: input_mode_read
label: Input Mode Read
kind: query
command: "CR1"
params: []
- id: lamp_time_read
label: Lamp Time Read
kind: query
command: "CR3"
params: []
- id: setting_read
label: Setting Read (Screen)
kind: query
command: "CR4"
params: []
- id: temp_read
label: Temperature Read
kind: query
command: "CR6"
params: []
- id: lamp_mode_read
label: Lamp Mode Read
kind: query
command: "CR7"
params: []
Feedbacks
- id: power_status
type: enum
values: [power_on, standby, countdown, cooling_down, power_failure, cooling_abnormal_temp, standby_abnormal_temp, power_save_cooling, power_save, cooling_lamp_failure, standby_lamp_failure, cooling_shutter_mgmt, standby_shutter_mgmt]
description: |
Returned by CR0. Encoding:
"00" = Power ON
"80" = Standby
"40" = Countdown in process
"20" = Cooling Down in process
"10" = Power Failure
"28" = Cooling Down in process due to Abnormal Temperature
"88" = Standby after Cooling Down due to Abnormal Temperature
"24" = Power-Save Cooling Down in process
"04" = Power Save
"21" = Cooling Down in process after OFF due to Lamp Failure
"81" = Standby after Cooling Down due to Lamp Failure
"2C" = Cooling Down in process after OFF due to Shutter Management
"8C" = Standby after Cooling Down due to Shutter Management
- id: input_mode
type: enum
values: [input_1, input_2, input_3, input_4_network]
description: |
Returned by CR1. "1"=Input 1, "2"=Input 2, "3"=Input 3,
"4"=Input 4 (Networking-capable models only).
- id: lamp_hours
type: integer
description: |
Returned by CR3. 5-digit value representing total lamp running hours
multiplied by a model-specific coefficient. Example: "00410" = 410 hours.
# UNRESOLVED: per-model coefficient not stated in source
- id: screen_setting
type: enum
values: [normal, rear_ceiling, rear, ceiling]
description: |
Returned by CR4. "11"=Normal, "10"=Rear+Ceiling (top/bottom reversed),
"01"=Rear (left/right reversed), "00"=Ceiling (both reversed).
- id: temperature_sensors
type: string
description: |
Returned by CR6. Three space-separated values "%1 %2 %3" (basic format " 00.0").
Negative values start with "-". Hardware-fault readings start with "E".
- id: lamp_mode
type: enum
values: [lamp_on, lamp_off]
description: |
Returned by CR7. "00"=Lamp ON, "01"=Lamp OFF.
Variables
# UNRESOLVED: source does not document a generic settable-parameter channel
# distinct from the discrete action set above.
Events
# UNRESOLVED: source does not document unsolicited notifications / async events.
Macros
# UNRESOLVED: source does not describe multi-step sequences.
Safety
confirmation_required_for:
- power_off # UNRESOLVED: only "C02" implies confirmation ("Power OFF?" message); C01 quick-off bypasses it
interlocks:
- status: cooling_down
behavior: "No Functional Execution Commands accepted; only ACK returned."
- status: abnormal_temperature
behavior: "No Functional Execution Commands accepted; only ACK returned."
- status: abnormal_power
behavior: "No Functional Execution Commands accepted; only ACK returned."
- status: abnormal_filter
behavior: "No Functional Execution Commands accepted; only ACK returned."
- status: power_save_cooling
behavior: "No Functional Execution Commands accepted; only ACK returned."
- status: cooling_lamp_failure
behavior: "No Functional Execution Commands accepted; only ACK returned."
initialization_window:
duration: "~7 seconds after AC power-on"
behavior: "Commands not processed; do not issue any command during this window."
input_switching_lockout:
duration: "5 seconds from start of INPUT switch action"
behavior: "ACK returned but command not executed (status reads are honored after 500ms)."
Notes
Command format: "C" + two-hex-chars + 0x0D for execution; "CR" + one-char + 0x0D for status read. All command characters must be uppercase A–Z. Successful execution returns ACK CR (0x06 0x0D); undecodable commands return ? CR. Pipelining interval: 100ms for VOLUME +/-, ZOOM UP/DOWN, FOCUS UP/DOWN, LENS-SHIFT UP/DOWN/LEFT/RIGHT; 500ms for all others. Functional execution commands hold a 120ms execution window per pipelined repeat. Status read pipeline: ≥500ms between reads. "C02" (power off) requires double-press semantics: first send displays "Power OFF?" confirmation; second send executes the off. "C01" is the quick-off variant that bypasses the confirmation. C28/C29/C2A/C2B/C2E write to EEPROM and persist across power cycles. Cooling-down status: ~90s of fan spin after power off before standby (model-dependent).
Provenance
source_domains:
- preproduction.christiedigital.com
- christiedigital.com
source_urls:
- https://preproduction.christiedigital.com/globalassets/resources/public/020-000139-01-christie-lx700-rs232-serial-communications.pdf
- https://www.christiedigital.com/globalassets/resources/public/020-000141-christie-lx1000-user-manual.pdf
- https://www.christiedigital.com/globalassets/resources/public/020-000046-02-lw600-rs232-expnd-codes.pdf
- https://www.christiedigital.com/globalassets/resources/public/020-000053-02-christie-lx900-lw600-user-manual.pdf
retrieved_at: 2026-05-14T15:02:49.722Z
last_checked_at: 2026-06-02T21:41:12.642Z
Verification Summary
verdict: verified
checked_at: 2026-06-02T21:41:12.642Z
matched_actions: 66
action_count: 66
confidence: medium
summary: "All 66 spec action ids matched literally in source; transport parameters (19200 baud, 8 data bits, no parity, 1 stop bit) verified; no commands extra. (8 unresolved item(s) noted in Known Gaps.)"
Known Gaps
- "source document is titled for LX700 only; applicability to LX1000/900/1200/LW600 assumed by family grouping and not explicitly stated in this excerpt."
- "per-model coefficient not stated in source"
- "source does not document a generic settable-parameter channel"
- "source does not document unsolicited notifications / async events."
- "source does not describe multi-step sequences."
- "only \"C02\" implies confirmation (\"Power OFF?\" message); C01 quick-off bypasses it"
- "per-model lamp-time coefficient, exact model-by-model applicability of the LX700 command set to LX1000/900/1200/LW600, and any firmware-version gating of individual commands are not stated in this source."
- "the 19200 baud \"initial setting\" is taken as the default; 9600 fallback is supported only via service-mode change. The on-wire default at first power-on is 19200 per the source."
From the AI4AV catalog (https://ai4av.net) · ODbL-1.0