Service manual

10 215
Post Repair Procedures
POST REPAIR PROCEDURES
10. Post Repair Procedures
A7 Synthesizer Frequency Accuracy CC
Image Rejection CC
Null Detector Offset CC
Null Loop Phase CC
Relative Impedance CC
OSC Level Monitor CC
OSC Level CC
Impedance Measurement CC
Inspect the Power On Sequence
*2
Frequency Accuracy Test
OSC Level Accuracy Test
Measurement Accuracy Test
A8 Vector Ratio
Detector
Image Rejection CC
Relative Impedance CC
OSC Level Monitor CC
Inspect the Power On Sequence
*2
External Test 20: ALL ANALOG
*2
Measurement Accuracy Test
A9 Floating Power
Supply
None
Inspect the Power On Sequence
*2
A20 Motherboard None
Inspect the Power On Sequence
*2
A30 Keyboard None
Inspect the Power On Sequence
*2
External Test 17: FRONT PANEL
*1
A32 I-BASIC Interface None
Inspect the Power On Sequence
*2
Check the A32 I-BASIC Interface and the mini
DIN Keyboard
*1
A34 EXT I/O None
Inspect the Power On Sequence
*2
A40 Pre-Regulator None
Inspect the Power On Sequence
*2
A50 DC-DC Converter None
Inspect the Power On Sequence
*2
A51 GSP None
Inspect the Power On Sequence
*2
Internal Test 4: A51 GSP
*1
A52 LCD None
Inspect the Power On Sequence
*2
A53 FDD None
Inspect the Power On Sequence
*2
External Test 18: FLOPPY DISK DRIVE
*1
A60 High Stability
Frequency Reference
Frequency Reference Adjustment
Inspect the Power On Sequence
*2
Frequency Accuracy Test (Opt.1D5)
*1.See the Digital Control Troubleshooting chapter.
*2.See the Troubleshooting chapter.
Table 10-1 Post Repair Procedures
Replaced
Assembly or Part
Adjustments
Correction Constants (CC)
Verification