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41388601TH Rev.2 122 /
5 Band/stripes in white or irregular color in the longitudinal direction (Figure 6.2- F )
• Is each LED head lens contaminated?
Yes Clean the LED head lens.
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• No Is each LED head assembly connected to the junction board (Y71 PWB) correctly?
No Connect the LED head assembly to the junction board (Y71 PWB) correctly.
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• Yes Check the cable connection, or replace the LED head assembly. Recovered?
Yes End
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• No Check the cable connection, or replace the junction board (Y71 PWB). Recovered?
Yes End
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• No Is the engine board (K73 PWB) connected with the junction board correctly?
No Connect the engine board with the junction board correctly.
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• Yes Check the cable connection, or replace the engine board (K73 PWB). Recovered?
Yes End
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• No Is each ID terminal connected to the contact assembly correctly? (See Figure 6.3.)
No Connect the ID terminals with the contact assembly correctly.
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• Yes Replace the ID unit.
Notes: 1. When replacing the engine board (K73 PWB), demount the EEPROM chip from the old
engine board and remount it on the new one.
2. In case the EEPROM chip is not replaced, see Item (2) in Sec. 6.5.2.