DIGITAL INTERNAL USE ONLY
5-58 Troubleshooting and Error Codes
10 SOl Command Length Error (LVL2)
Error Type: PE
Error Description: An SDI command length error, LVL2, indicates the number of bytes expected did not equal the number of bytes received for an SDI level 2 command.
Fault Isolation/Correction:
1. Controller 2. SDI cable 3. ECM
11 Microcode Cartridge Load Occurred
Error Type: Informational Only
Error Description: This logged event indicates that a drive microcode update successfully occurred.
This new event occurred with the introduction of the Etch-F I1O-RIW module. Etch-F revision ECM boards are -indicated by revision 1 or later in the lOP and SRV values reported with drive internal test T45. (There are a minimal number of Etch-E revision modules that provide this information.)
Fault Isolation/Correction:
1. Information only 12 Spindle Speed Unsafe Error
Error Type: DE
Error Description: During idle loop, a spindle speed check indicated the drive was not up to speed at 3600 rlmin (:t 18 r/min). The servo processor will also detect this condition dynamically and have the master processor log this error as well.
Fault IsolatioDlCorrection: Disabling the brake circuit may aid in troubleshooting. The brake can be disabled by opening either pin 4 or 5 of the rear HDA connector. Use the pin extraction tool (PIN 29-26655-00) to avoid breaking pins.
CAUTION
The female pins in the HDA connector are delicate and must be handled with care.
When disabling the brake, cover loose pins with electrical tape to prevent them from shorting.
1. Reseat HDA 2. ECM
3. Power supply 4. Brake
5. HDA
DIGITAL INTERNAL USE ONLY
13 Spindle Motor Control Fault Error Type: DE
iroubleshooting and Error Codes 5-59
Error Description: The motor control Ie detected a condition that prevented the spindle from getting up to speed.
Fault IsolatioDlCorrection:
1. Reseat ECMlHDA 2. ECM
3. HDA
A number of checks are made to detect this fault. A failure of any of the following checks results in this error:
1. If no Hall effect is seen within 700 ms after current is applied to the spindle motor.
2. If the SSI chip on the servo module which controls spindle speed rotation is operating at less than 6.8 volts.
3. If the brake circuit is activated at the same time that current is applied to the spindle.
4. If the Hall sensor input from the spindle motor is not occurring at a 700 ms rate.
Additionally, any open condition in the spindle circuitry, including Hall sense phase or spindle motor phase circuitry, causes this error to be asserted.
Although power supply voltages cannot be adjusted, they can be meaB".L~ by removi..ng the small cover as shown in Figure 5-8 (power supplies bearing a serial number starting with
ex
only). On the back of the connector, the pin numbers are visible. A very small electrical probe is required to make connection.
POWER SUPPLY
I
II I
----...1
QUARTER-TURN> HOLD-DOWN ~:::::::ttr---~,L.J
SCREWS
Figure 5-8 Power Supply Cover Removal
POWER SUPPLY ACCESS COVER
CXO-2184B
DIGITAL INTERNAL USE ONLY
5-SO Troubleshooting and Error Codes
Removal of this cover allows access to the power supply output voltage connector. 1b remove the power supply cover, use a quarter-inch hex driver. Remove the hold-down screws. Next, use a DVM or oscilloscope to measure the points to ground (black lead) as shown in Table 5-9.
Table 5-9 Power SUpply Voltage Measurements Pin
In addition to these measurements, error codes 2D and FF indicate power problems.
Along with the power supply measurements, a number of resistance checks can be made to the HDA. The HDA must first be removed from the drive chassis. Exercise care when handling the HDA so that connector pins are not damaged during measurements. DO NOT jam probes into the connector housing from the front of the connector because it is easy to damage the pins in these sockets. Access the pins from the rear of the connector or use the pin insert/extract
DIGITAL INTERNAL USE ONLY
Troubieshooting and Error Codes 5-61
tool (PIN 29-26655-00) to remove pins from connectors for easier measurements. Refer to Table 5-10 to locate opens in the circuits.
Table 5-10 lists pin-to-cireuit connections.
Table 5-10 HDA Connector Pin Designations Pin Wire Color Cireait
1 Blue Positioner lock solenoid (-) 2 Blue Positioner lock solenoid (+)
4 White Brake (-)
5 White Brake(+)
6 Green sa
7 Violet S2
8 Flex Positioner actuator 1Ix (-)
9 Orange S1
10 Flex Positioner actuator fix (+) ii Brown Ball sen&Or ground 12 Gray Spindle motor coil C 13 Red Hall sensor 5 V input 14 Blue Spindle motor coil B 16 Black Spindle motor coil A
Grnd Yellow Spindle motor lamination lead exits HDA and is grounded on HDA.
Resistance measurements are checked according Table 5-11.
Table 5-11 HDA Resistance Measurements
(-)Pm to (+)Pm Circuit Measured Value
16-14 Coil A - Coil B 1.4 ohm
16-12 Coil A- Coil C 1.4 ohm
14-12 Coil B - Coil C 1.4 ohm
16 - HDA ground Coil A - ground 2Omegobm
14 - HDA ground Coil B - ground 20megobm
12 - HDA ground Coil C - ground 2Omegobm
9-7 SI- S2 2Omegobm
9-6 SI- sa 2Omegobm
7-6 S2- sa 2Omegobm
9-13 S1- Hall 5 V 20megobm
7-13 S2-Hall5V 20megobm
6-13 sa-Hall5V 20 megohm
9-11 SI - Hall ground ~4.50 megobm
DIGITAL INTERNAL USE ONLY
5-62 Troubleshooting and Error Codes
Table 5-11 (Cont.) HDA Resistance Measurements
(-)Pin to (+)Pin Circuit Measured Value
7-11 82 - Hall ground ~4.30 megohm
6-11 S3 - Hall ground ~4.50 megohm
11-13 Hall ground -
Han
5V ~7megohm1-2 Positioner lock solenoid ~30ohm
8-10 Actuator coil ~4 ohms
14 Head Offset Margin Event
Error Type: DE
Error Description: This is not an error condition. Manufacturing sets the enable ftag for the detection of this event. If this code shows up in the field, reset the ftag by taking the drive off line and powering it down and then up.
Fawt~~tio~Co~tion:
1. Power drive off and back on.
15 Head Offset Out-of-Band Error
Error Type: DE
Error Description: Head offset has exceeded normal head offset parameters for this drive.
This is a serious problem. Data is in danger of being lost. Do not use the drive for further writes. Initiate prompt backup. Head offset errors can result from an over-temperature condition. Check drive airflow and ambient room temperature. If temperature appears to be normal, replace the HDA
The amount of offset necessary before this eITOr is ftagged is :3/4ths of a track. After each offset table rebuild, the servo processor tests each head value against this threshold. If a head exceeds offset limits, the master processor asserts ATTENTION and uses the GET STATUS response to identify which head or heads are involved.
The drive specific bytes of the drive internal error log should indicate which head has marginal offsets.
Fawt Iso~tioDlCorreetion:
1. HDA