Service manual

Section IV: On-line Processor
Functional Analysis 2-5
• X600–Power supply input
10V AC and 18V AC from the secd. of the transformer.
• X400, RS-232 ATB–Data communication link between the LCB pcb and the
Agfa Terminal Board (ATB) power supply.
Connections:
-1/2 connected to the ATB L3-1 and L3-2 serial data codes
-3 connected to the ATB L3-3 12V DC
-4 connected to the ATB L3-4 ground
-5 connected to the ATB L3-5 18V AC
• X402, RS-232 OLP Com.– (Only used with the OLP version) Data communi-
cation link between the LCB pcb and the imagesetter via L4.
• X200, Output–digital output. Output is constructed as open collectors
(active = low). The necessary driving voltage (+12V) is sourced from the
LPB pcb.
Connections:
-1 connected to the LPB X1-4 control the K9 (Fix. repl. pump)
-2 connected to the LPB X1-5 control the K8 (Dev. repl. pump)
-3 connected to the LPB X1-6 control the K7 (Dryer fan and basic
heat)
-4 connected to the LPB X1-7 not used Q5
-5 connected to the LPB X1-8 control the Q3 (Fix heat 1500W)
-7 connected to the LPB X1-10 control the Q1 (Dev heat 1500W)
-8 connected to the LPB X1-11 control the K12 (Drive motor)
-10 connected to the LPB X1-2 control the K11 (Circ. pumps)
-11 connected to the LPB X1-3 control the K10( Aqua stop sol.)
-12 connected to the LPB X7-2 control the Q4 & Q6 via X1-12
-13, -6 connected to the LPB X1-9 related to K2 (not used)
-18 connected to the LPB X1-13 Ground
-21/22 connected to the LPB X1-1 12V DC
• 2, LUTH Power Board (LPB)–The LPB switches the necessary 220 V com-
ponents on and off. The Triac board includes 5 long-life zero-crossing Triac
channels and 7 power relays with noise suppression circuits across the
contacts. Because the replenishment pumps operate on half-wave rectified
AC, two diodes are mounted at the appropriate relays.