Hitachi L-8900 Service Manual page 25

3. Troubleshooting ............................................................ 3 - 1
3.1 Trouble Cause Analysis ................................................ 3 - 1
3.1.1 Pump Pressure Abnormal .......................................... 3 - 1
3.1.2 Baseline Noise ........................................................... 3 - 2
3.1.3 Baseline Drift ............................................................. 3 - 3
3.1.4 Poor Performance ...................................................... 3 - 3
3.2 Remedies ...................................................................... 3 - 4
3.2.1 Remedies for Autosampler ........................................ 3 - 4
3.2.2 Pump ......................................................................... 3 - 5
3.2.3 Column Oven Troubleshooting .................................. 3 - 8
4. TECHNICAL INFORMATION ........................................ 4 - 1
4.1 MAINTENANCE PARTS LIST ..................................... 4 - 1
4.2 MAINTENANCE SPARE PARTS ................................ 4 - 2
4.3 COLUMN REPLACEMENT ......................................... 4 - 3
4.4 L-8900 PART, PART NUMBER LIST .......................... 4 - 4
4.5 UNIT PARTS REPLACING PROCEDURE .................. 4 - 5
4.5.1 Column Oven ........................................................... 4 - 5
4.5.2 Reaction Bath .......................................................... 4 - 10
4.5.3 Degasser ................................................................. 4 - 15
4.5.4 Pump Purge Valve ................................................... 4 - 20
4.5.5 Weight Sensor ......................................................... 4 - 21
4.5.6 Weight Sensor for Waste Solution ........................... 4 - 26
4.5.7 Adjustment Specifications for 100N type Load Cell .. 4 - 27
4.6 ADJUSTING PC BOARD ............................................ 4 - 28
4.6.1 Adjusting ZERO/SPAN of PUMP PC Board
(P/N 852-6010) ........................................................ 4 - 28
4.6.2 Adjusting Reaction Bath Device PC Board
(P/N 852-6033) ........................................................ 4 - 30
4.6.3 Adjusting Column Oven PC Board
(P/N 852-6030) ........................................................ 4 - 31
4.7 HANDLING UI PAD, BUTTON FUNCTION
CORRESPONDENCE ................................................. 4 - 34
4.7.1 Annex Board UI Pad Operation ................................ 4 - 35
4.8 FLOW PATH DIAGRAM ............................................. 4 - 46
4.9 Wiring Diagram between PC Boards ........................... 4 - 48
4.10 CIRCUIT DIAGRAM .................................................... 4 - 49
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