Summary

19" flat CRT computer monitor from the early 2000s. Features a 0.25mm dot pitch (advertised as "0.21mm horizontal") and an 86 kHz horizontal scan rate. Manufactured by Tatung.

Literature

• Owner's Manual (A90f+)
• Owner's Manual (E90F)
• Service Manual (A90f+, (VCDTS23307-2R))
• Service Manual (E90f, (VCDTS23307-1M))

Notes

This monitor has a service menu and can be calibrated without any special hardware. To access it, power on the monitor while holding the "2" button.

Viewsonic's E90F appears to be identical to this model. The schematics, parts list, and service adjustment procedures are the same, and the service menu lists it as "E90f/A90f".

Voltage checks

B+ should be ~80v off pin 2 of the flyback. HV should be ~26kV at the anode. Heater is DC derrived from 8v rail, should be ~6.3.