Compuprint 4247-X03 - Manual (Page 183)

Airflow
The printer uses two fans to cool its internal parts. Be sure that you do not block
the air vents. Lack of correct cooling and ventilation can cause printer failures and
improper operation.
Declaration of product noise emission values
The following tables show the noise emission values for the 4247 Printer.
Table 30. Sound Emission Levels - with Standard Covers
Sound Emission Category Operating Idling
LWAd (1 bel = 10 decibels) 6.8 bels 3.7 bels
<LpA>m (bystander positions) 57.9 decibels 26.7 decibels
Notes:
1. LWAd is the declared sound power emission level for a production series of
machines.
2. <LpA>m is the mean value of the space-averaged sound pressure emission
levels at the one-meter position.
3. The principle printer configuration used to measure the noise emission levels
with standard covers was:
v
Standard covers
v Front Push forms path
v DP print quality
v Without Quiet Mode
All measurements are made in accordance with International Organization for
Standardization (ISO) 7779 and reported in conformance with the International
Organization for Standardization (ISO) 9296.
The Parallel Interface
The 4247 Printer supports the Parallel Printer Interface. A single, 36-pin connector
is mounted on the adapter card.
Attach the PC-parallel interface to the host by using one of the following cables:
v Standard PC parallel printer cable, up to 1.8 m (6 ft) in length
v 1284 Bidirectional parallel printer cable, up to 4.57 m (15 ft) in length
Parallel connector pin assignments
Pin Number Signal Name Description
1 -STROBE Strobe
2 - 9 DATA Eight Data Lines
10 -ACKNLG Acknowledge
11 BUSY Busy
12 PE Out of Paper
13 SLCT Printer Selected
14 -AUTO FEED XT Automatic Line Feed on EOL
15 Unused
Appendix A. Printer specifications 167