Trendsetter 400/800 -FCO E492

Field Change Order #E492

Applies to	Trendsetter NEWS Trendsetter 400/800 Trendsetter Spectrum Proofsetter Spectrum	Priority =Next Failure Reason = Reliability Release date = 13 Dec 2001

Machines affected	All TS NEWS TS400/800 with common power box 11-0872 (100 label #12)
Component	PS3, Carriage Amp, and new adapter cable #10-5067A
Problem	For some combinations of PS3 and carriage amps, the current drawn by the carriage amp is below the minimum required to reliably maintain PS3 operation. The result is a cyclic DC on/off condition. There is no inherent fault with either component. The symptom of this problem is as follows: After power-up, all indicator LEDs on the Carriage Amplifier are flashing on and off in unison. Measurement of the +5V, +12V, and -12V lines shows that these voltages are turning on and off.
Solution(s)	The addition of a new adapter cable, in-line with the existing PS3/4-CA cable, provides an additional load to the +5V rail and draws the minimum current required: Power down the device. Remove the cable connector from J1 (CA-PWR) on the Carriage Amplifier. Insert the 10-5067A Preload Adapter Cable (assembly drawing ) between J1 and the loose cable connector. If necessary, gently bend the leads of the power resistor present on the Preload Adapter Cable to avoid contact with other components.
Parts needed	10-5067A preload cable assembly
Technical contact	Steve Froese