IBM 2025 Maintenance Manual page 213

Name Location Length
Tolerance
PSS 83 E3D04 15us.
+5, -0
Strobe Delay 83 M2D04 250ns.
Note 1
Home Gate 83 F3803 340us. ± 20us.
(Model 2, 7) (Upper)
Home Gate 83 F3803 160us. ± 15us.
(Model N1)
(Upper)
Coil Protect
83 D3803 3.5ms ±350us.
(Upper)
Coil Protect 83 C4803 1.5ms ± 150us.
(Upper)
Coil Protect 83 D3D10 2.0ms ±200us.
(Lower)
Coil Protect 83 C4D10 5.0ms ±500us.
(Lower)
Single Space 83 L6B03 5.5ms Note 2
Double Space 83 F3807 9.8ms Note 2
Triple Space 83 L6D10 13.8ms Note 2
Note 1: This value is given as a starting point - see
Buffer Adjustment
Note 2: These values are given as a starting point.
The exact value varies with each printer and
must be obtained by using the procedure out-
lined in Diagnostic Section * 420, Routine WESS.
Figure 4-12. 1403 Singleshots
4.14 .• 2 .. 2 Home Gate (B3F3B03)-(Upper) PR252
ModQl 2 or 7: Adjust using diagnostic
routine WE06 in Section *400. This
provides a range of 320 to 360
microseconds.
Model N1: Adjust using diagnostic routine
WE06 in Section *400. This provides a
range of 145 to 175 microseconds.
4 .1'& .2 .• 3 Coil Protect PR691
Adjust using diagnostic routine WE26
in
Section •400. The diagnostic fires the
singleshots. and the resulting waveforms
can be observed on the oscilloscope.
4.14.3 Delays (Figure 4-13)
Name Input Output
Length
Carriage Settling Delay 83 H7D02 83 H7D13 See 4.14.3.2
Speed Limit 83 J2005 83 J2D13 See 4.14.3.1
Figure 4-13.. 1403 Delays
4.14.3.1 Speed Limit Delay PR262
Adjust using diagnostic routine WE29 in
Section
*
400.
1403-2 or 1403-7 without MCS: A minimum of
46 print scans must be taken before the
last scan is allowed. This gives a maximum
speed of 610 lines per minute.
4-12 ( 7/69)
1403-2 or 1403-7 with
~S:
A minimum of 35
print scans are taken before the last scan
is allowed. This gives a maximum speed of
750 lines per minute.
1403-Nl without MCS: A minimum of 45 print
scans must be taken before the last scan is
allowed. This gives a maximum speed of
1127 lines per minute.
1403-Nl with MCS: A minimum of 30 print
scans must be taken before the last scan is
allowed. This gives a maximum speed of
1419 lines per minute.
4 .• 14.3.2 Carriage settling Delay CPR742)
Adjust using diagnostic routine WE51 in
Section •420 after setting the single-space
singleshot. For the 1403-2 or 1403-7, this
will give a combined single space and
carriage settling range of 20.4 to 21.4 ms.
For the 1403N1 this gives a combined single
space and carriage settling range of 20.6
to 20.
9
ms.
4 .. 14 .• 4 BUFFER SERVICE CHECKS
Refer to Section 4.14.6.
4.14.5 BUFFER ADJUSTMENT
1. Set all voltages are specified in
Chapter 5.
2. Initially set Vsl to +3V with respect
to ground (PR551) using the upper
potentiometer.
4.14.5.1 Vxy Adjustment
1. Estimate the temperature of the room.
Measure Vxy C01A-C3L2D11) with respect
to ground.
2. Set Vxy using the lower potentiometer
ofC3L2 to the appropriate value with
respect to the room temperature:
60F (15.6C)
70F (21.lC)
80F (26 .• 7C)
90F (32.2C)
+1.6V
+1.5V
+1.4V
1.3V
Note: If air conditioning ducts or
floor cutouts allow air colder than room
temperature at the input to Gate-A in the
C-board area, use the Vxy setting for the
next lower temperature. If such cooling
conditions are present, check Vxy after the
gates have been closed to verify that the
voltage is at the desired value. It may be
necessary to readjust for the proper
setting.