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Specifications
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WFM90D and WFM91D Service Manual
Characteristics Tables
The tables use the following abbreviations:
Performance Requirement (Req). All performance requirements in the specifica-
tion tables are identified with Req, and can be assured by completing the
Performance Check Procedure located in the se rvice manual. Allow a warm-up
time of 20 minutes.
Performance requirements in the electrical specifications are valid over an
ambient temperature range of +20° Cto+30° C. The Performance Requirement
tolerances listed in the Electrical Specification are doubled over the temperature
range of 0° Cto+40° C, unless otherwise specified. Test equipment used to
verify Performance Requirements must be calibrated and working within the
limits specified in the service manual Equipment Required List.
Reference Information. Information that amplifies a performance requirement or
is of special importance is indicated by REF. There is no need to check these
items to a specific tolerance.
Electrical Specifications
Table 1- 1: Vertical deflection system
Category Description
Frequency Response
Analog Input REF: Specifications appl y for full screen height video input signal, with VARIABLE GAIN off.
REQ: Flat Filter 1 V Full Scale:
50 kHz to 6 MHz within 2% of response at 50 kHz.
REQ: Flat Filter X5 Gain:
50 kHz to 6 MHz within 5% of response at 50 kHz.
REF: Low Pass Filter:
≥40 dB attenuation at 3.58 MHz NTSC, 4.43 MHz PAL.
REF: Response at 15 kHz does not vary between FLAT and LUM (low pass) filters by more than 1%.
Digital Input REF: Specifications apply for full screen height video input signal, with VARIABLE GAIN off.
REQ: Flat Filter 1 V Full Scale:
50 kHz to 4.5 MHz ±4%.
REQ: Flat Filter X5 Gain:
50 kHz to 4.5 MHz ±5%.
REF: Low Pass Filter:
≥40 dB attenuation at 3.58 MHz NTSC, 4.43 MHz PAL.
REF: Response at 15 kHz does not vary between FLAT and LUM (low pass) filters by more than 1%.