HP Color 9850mfp Service Manual - Page 512

2 UNIT EXPLANATION Q3224A [4] Scraps Removal Control SCAN OUT 1 SCAN OUT 2 M102_CONT SCAN IN 1 SCAN IN 2 FINISHER TUDB 24V LD GND 5V IN GND 5V GND IN GND M108 PS107 LED101 PS109 (3) LD (M108 to TUDB) M108 error detection signal. [H]: Error (4) SCAN OUT1, 2 (Finisher to TUDB) Serial data line used to report the operating state of the finisher to the Q3224A. b. Output signals (1) GND (TUDB to M108) M108 drive signal. [L]: M108 ON [H]: M108 OFF (2) SCAN IN1, 2 (TUDB to finisher) Serial data line used to report the operating state of this machine to the finisher. Paper scraps are blown by the scraps removal fan driven by M108(scraps removal) and collected in the scraps box. The scraps box is provided with an LED101 (scraps full LED) and a PS109 (scraps full). When the scraps box becomes full, the full state is displayed on the operation panel of the engine. The M108 is driven by the TUDB (Trimmer drive board) under the control of the finisher. The related signal is a PS107 (scraps box detect). 1. Operation a. Scraps removal motor operation The M108 turns ON/OFF in sync. with the M102 (trimmer). b. Scraps box full state detection When the sraps box is filled with scraps, the light path between the LED101 and the PS109 which are provided on both sides of the scraps box is blocked to turn OFF the PS109. Thus, the message indicating that the scraps box is full is displayed on the engine. 2. Signals a. Input signals (1) IN (PS107 to TUDB) Scraps box setting detection signal. [L]: Scraps box is set. [H]: Scraps box is not set. (2) IN (PS109 to TUDB) Scraps box full state detection signal. [L]: Not full [F]: Full 2 - 10