Canon PC940 Service Manual - Page 380
Composite Power Supply Circuit Diagram [A508] 7/8, LAMP_DETECT <A509>
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Composite Power Supply Circuit Diagram [A508] (7/8) +5V C903 PAC_S 1 PAC_S Q901 +5V HV_LIMIT 2 +5FBT 3 HV_LIMIT 2 3 IN OUT GND 1 RESET 4 RESET* JP999 5 MODE1 NC 6 MODE2 NC 7 J_CTL LAMP_ON 8 NC PAC_OUT 50 49 5V_ON* PW_OFF* 48 CPS_REQ* 47 DATA1 46 DATA2 45 DATA3 44 DATA0 43 PWM_1KHz +5V VR801 R802 AC_MONITOR 9 FL_LIGHT_ON* 10 AC_MONI_VR 11 AC_MONI TOR T_FW_ON 42 ACK* 41 CLK32K 40 12 AGND PGND 39 13 FL_S XI 38 NC 14 P_C_S XO 37 +24VR DC24V_S 15 +24V 16 DC24V_S +5V 36 MPWM_CLK 35 T_FEEDBACK BIAS_S 17 T_FEEDBACK 18 BIAS_S MPWM 34 PDC_PWM 33 PDC_S CLIMIT 19 PDC_S 20 CLIMIT BIAS_PWM 32 +24V 31 PROTECT TIM 21 PROTECT 22 TIM ACBIAS 30 29 SKGND T_REV_ON* T_FW_DRV T_FW_S 23 T_REV_ON* 24 T_FW_DRV 25 T_FW_S 28 S_IN 27 S_OUT 26 S_CLK Q900 JP999 : 220 / 240V model only PAC_OUT 5V_ON* PWOFF CPS_REQ PR_DC_ON DV_DC_ON DV_AC_ON STBY/CPY* LAMP_DETECT T_FW_ON ACK* CLK32K NC NC +5V MPWM PDC_PWM BIAS_PWM +24VR ACBIAS SKGND S_IN S_OUT S_CLK +24VU J205 4 3 +24VU GND 2 MMD 1 MLOCK J203 1 2 3 4 5 6 7 8 RLOFF* ACK* MMD CPS_REQ PR_DC_ON DV_DC_ON DV_AC_ON STBY/CPY* J204 1 2 3 4 5 6 7 PWOFF S_IN S_OUT S_CLK ZER_CRS HEAT_TRG MLOCK COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) A-25