Crown 460CSL service manual Checkout Procedures, Standard Initial Conditions, Test 1 DC Offset

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Power Base-1 & 460CSL Amplifier Service Manual

Checkout Procedures

GENERAL INFORMATION

The following test procedures are to be used to verify operation of this amplifier. DO NOT connect a load or inject a signal unless directed to do so by the proce- dure. These tests, though meant for verification and alignment of the amplifier, may also be very helpful in troubleshooting. For best results, tests should be performed in order.

All tests assume that AC power is from a regulated 120 VAC source. Test equipment includes an oscillo- scope, a DMM, a signal generator, loads, and I.M.D. and T.H.D. noise test equipment.

STANDARD INITIAL CONDITIONS

Level controls fully clockwise. Stereo/Mono switch in Stereo.

Sensitivity switch in 26 dB fixed gain position.

It is assumed, in each step, that conditions of the amplifier are per these initial conditions unless other- wise specified.

TEST 1: DC OFFSET

Spec: 0 VDC, ±10 mV.

Initial Conditions: Controls per standard, inputs shorted.

Procedure: Measure DC voltage at the output connec- tors (rear panel). There is no adjustment for output offset. If spec is not met, there is an electrical malfunc- tion. Slightly out of spec measurement is usually due to U104/U204 out of tolorance.

TEST 2: OUTPUT BIAS ADJUSTMENT

Spec: 300 to 310 mVDC.

Initial Conditions: Controls per standard, heatsink tem- perature less than 40°C.

Procedure: Measure DC voltages on the output module across R31, adjust R26 if necessary. Measure DC voltages on the output module across R32, adjust R23 if necessary. Repeat for second channel.

TEST 3: ODEP VOLTAGE ADJUSTMENT

Spec: Cold Bias Per Charts Below ±0.1V DC.

Initial Conditions: Controls per standard, heatsink at

room temperature 20 to 30°C (68 to 86°F). Note: This adjustment should normally be performed within 2 minutes of turn on from ambient (cold) conditions. If possible measure heatsink temperature, if not mea- sure ambient room temperature. Use this information when referencing the chart below.

The following is a list of ODEP Bias Voltages VS. Temperature.

°F

°C

V–ODEP

V+ODEP

66

18.9

–10.31

11.41

68

20.0

–10.26

11.36

70

21.1

–10.20

11.30

72

22.2

–10.14

11.24

74

23.3

–10.09

11.19

76

24.4

–10.03

11.13

77

25.0

–10.00

11.10

78

25.6

–9.97

11.07

80

26.7

–9.91

11.01

82

27.8

–9.86

10.96

84

28.9

–9.80

10.90

86

30.0

–9.74

10.84

88

31.1

–9.69

10.79

90

32.2

–9.63

10.73

92

33.3

–9.57

10.67

94

34.4

–9.51

10.61

–ODEP Procedure: Measure pin 6 of U100 and, if necessary, adjust R121 to obtain V–ODEPas specified above. Measure pin 6 of U200 and, if necessary, adjust R221 to obtain V–ODEPas specified above.

+ODEP Procedure: Measure pin 6 of U103 and, if necessary, adjust R132 to obtain V+ODEP as specified above. Measure pin 6 of U203 and, if necessary, adjust R232 to obtain V+ODEP as specified above.

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Contents Power BASE-1& 460CSL Avis Table of Contents Introduction WarrantyScope Parts Power SpecificationsPerformance MechanicalBLU Voltage ConversionTheory FeaturesOverview Front END OperationVoltage Translators Error AmpHigh Side HS Grounded Bridge TopologyLow Side LS Output Device Emulation Protection OdepPositive Test 2 Output Bias Adjustment Checkout ProceduresTest 3 Odep Voltage Adjustment Standard Initial ConditionsTest 5 Common Mode Rejection Test 4 AC Power DrawTest 7 Phase Response Test 12 Output PowerPost Testing Test 16 Signal to Noise RatioTest 14 Odep Limiting Test 15 LF ProtectionCheckout Procedures Mechanical Non-Module Parts Back Panel Assembly Output Assembly ONE PER ChannelChassis Front Assembly Main Chassis Assembly Module History Module InformationOutput Modules Main ModulesQ42576-1 Output Module Parts List P10137-1 Board Q42661-1 Output Module 4 Resistor #2 for PB-1 Q42661-1 Output Module Parts List P10137-1 BoardQ42718-9 Output Module 4 Resistor #3 for PB-1 Q42718-9 Output Module Parts List P10233-8 BoardQ42885-6 Output Module Parts List P10305-4 Board Q42967-2 Output Module Parts List P10341-9 Board Q43200-7 Output Module Parts List P10397-1 Board Network Resistors Q42552A0 Main Module Parts List D 6304B2 BoardQ42552A0 Main Module Original for PB-1 IC’S SwitchesQ42664-5 Main Module Parts List D 6910-0 Board UPA75 PNP Q42682-7 Main Module #2 for PB-1 Q42682-7 Main Module Parts List D 6910-0 BoardTrim POT InterconnectsBoard Mounts U1, U2 Q42776-7 Main Module 3rd Gain for PB-1 Q42776-7 Main Module Parts List D 7251-8 BoardDpdt Side Header 5 PIN Q42953-2 Main Module Parts List D 7251-8 Board UPA75 Misc Q43060-5 Main Module Parts List D 7993-5 Board Jumper 7325-1 Ground Lift 7960-5 Sensitivity 6781-6 Stereo/Mono

460CSL specifications

The Crown 460CSL is a powerful combination of innovation and performance that redefines efficiency in the material handling industry. Designed for heavy-duty tasks, this electric lift truck offers an impressive range of features that cater to the demands of modern warehouses and distribution centers.

One of the standout characteristics of the Crown 460CSL is its advanced ergonomic design, which prioritizes operator comfort and productivity. The spacious operator compartment is designed to minimize fatigue during extended use, featuring a low step-in height for easy access and a fully adjustable seat that provides optimal support. The intuitive controls are positioned for easy reach, allowing operators to maneuver the lift truck with ease and precision.

At the heart of the Crown 460CSL is its robust AC motor technology. This powerful motor provides rapid acceleration and smooth operation, reducing both energy consumption and maintenance needs. The regenerative braking system helps to extend battery life by converting braking energy back into stored energy, making the lift truck more efficient during operations. Operators benefit from enhanced traction and stability, ensuring dependable performance on various surfaces.

The Crown 460CSL boasts industry-leading lifting capabilities, with a maximum lifting capacity often exceeding competitors. Its precision-engineered mast allows for smooth and steady lifting of heavy loads, while its advanced hydraulic system provides reliable control over load placement. The lift’s extended height options enable operators to handle tasks at varying elevations, from ground level to tall shelving systems, with confidence.

Safety is a top priority for Crown, and the 460CSL incorporates several features designed to protect both operators and the loads being handled. The truck is equipped with a comprehensive suite of safety features, including an integrated stability system, load monitoring capabilities, and a visibility-enhancing overhead guard. These features work together to provide operators with greater awareness of their surroundings, reducing the risk of accidents.

In terms of technology, the Crown 460CSL integrates advanced diagnostics and connectivity features. This enables fleet managers to monitor performance, track usage patterns, and schedule maintenance with ease. Remote access to diagnostic information ensures that any potential issues can be identified and resolved promptly, further enhancing the truck's reliability and efficiency.

In conclusion, the Crown 460CSL stands out in the crowded lift truck market due to its combination of ergonomic design, powerful motor technology, impressive lifting capabilities, and enhanced safety features. This electric lift truck is an excellent choice for businesses seeking to improve productivity and reduce operational costs while maintaining a safe and comfortable working environment for their operators.
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