Functional Components; (50, 100, And 155 Ipm); Type Belt Transducer - IBM System/32 Introduction And Maintenance Manual

4.1.2 Functional Components
(50, 100, and 155 Ipm)
Type Belt Transducer
The type belt transducer detects the raised
timing marks on the type belt. Thses marks are
converted to emitter pulses in the transducer and
sent to the control card. The control card uses
these pulses to generate the home pulse, the
subscan pulses, and the belt up-to-speed signal.
The home pulse and subscan pulses are used to
synchronize the mechanical and electrical por-
tions of the print operation. The belt up-to-
speed signal is sent to the attachment to indicate
that the belt is up to operating speed.
Drive Motor
Printer
I
Attachment
Emitter
Lead 2
Detect Home
Ckts
~----'--1 Detect
Belt
Emitter
Lead 1
I
I
Ipss
Home-
Decode
Circuits
(belt) Motor
Print
Subscan
Subscan 1
Subscan 2
Subscan 3
Subscan 4
Subscan 5
DQ200
Missing Timing
Mark
1
Ribbon
Type Belt
Transducer Type Belt
(home pulse)
- l H - 1 0 0 p s
~
~
____
~nL~1
________________
~--~
_______________
I
I
I
I
I, Print Scan 1
I
Scan 2
Belt Printer 50, 100, and 155 Ipm 4-5