5051_Test_Spec 电路图.pdf

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1、.:i:;,.,-,.t. . - - TEST SPECIFICATION: TL Audio IVORY 5051 VOICE PROCESSOR Ref. Number: TS5051 Issue 1. Page 1 of5 Tolerance on inputs +/- 0.3 dBu, outputs - - 1 dBu, unless otherwise stated. Tests must be perfonned in sequence, willI controls chang.:d as indicated. 1. mSTORY SHEET. Each unit must

2、be accompanied by an INSTRUMENT mSTORY SHEET. Ensure the Histo Sheet has been completed satisfactorily. 2. MAINS VOLTAGE. Check the Mains Switch setting on the rear panel. It must be 230V. 3. EARTH CONTINUITY. Check the earth connection from the IEC connector to the rear panel. Check the tightness o

3、f the Rear Panel Earth connection. It must be tight. Check that an Earth S)tnool has been placed adjacent to the Earth Terminal. 4. VISUAL INSPECTION. Inspect the unit, paying particular attention to the followg: 4.1 PSU Capacitors and Diodes. Value and orientation. 4.2 Intergrated circuits. Type an

4、d orientation. 4.3 Transfonner Wiring. . Wired as per PCB silk screen. Check insulation of wires. 4.4 Soldered Joints. Check for solder shorts, dry or unsolderedjoints. 4.5 Internal Fuses. Check fuses are seated correctly. Check values as stat on the PCB Silk Screen. 4.6 External Finish. Check front

5、 and rear panel silk screening for legilbility. Check all external surfaces for marks and blemishes. Check that all screw heads are undamaged. check screws are tight. 4.7 Knobs and Switches. Check that Knobs and Switches move freely. Check they are correctly aligned with their legends. Check they ar

6、e uniformly spaced from the front panel. 4.8 LED Alignment. Check that all LEDs are equally spaced from the front panel. 5. FIT VAL YES Check the valve bases for splayed pins. Perform corrective action as necessary. . All valves are ECC83/l2AX7 A unless otherwise stated. Plug valve in each socket, e

7、nsure valve is a tight fit Do not wiggle valve in socket. 6. SWITCH ON. Check Mains Switch moves freely. Leave in OFF position. Set DVM to DC Voltage and connect between Ground TEST SPECIFICATION: TL Audio IVORY 5051 VOICE PROCESSOR Ref. Number: TS5051 Issue I. Page 3 of5 Tolerance on inputs +/- 0.3

8、 dBu, outputs +/- 1 dBu, unless otherwise stated. Tests must be perfonned in sequence, with controls changed as indicated. 10. INITIAL TES:rS. 10.1 PHANTOM POWER. Set INPUT switch to MIC position.(from MIC +48v) Connect DVM to XLR pin 2 and Ground. Set INPUT switch to MIC +48v position. Check for +4

9、8 volt reading.(+ Iv/-4v) Repeat test for XLR pin 3 and Ground. 10.2 SIGNAL BALANCE. Set OUTPUT GAIN control to mid-position. Connect input to LINE XLR 0.0 dBu. Set INPUT switch to LINE. Alternately scope pins 2 & 3 of OUTPUT XLR while adjusting RV20. Adjustment is complete when the signals at pins

10、2 & 3 are equal. 10.3 COMPRESSOR OFFSET. ConnectDVMtoTP2. Adjust RV2 for a reading of -400 mVolts DC. 10.4 GATE LEVEL. Remove input signal. Connect DVM to TP3. Adjust R V3 for a reading of +80 m Volts DC Note: Value will fluctuate slightly. If +80 m Volts cannot be achieved shunt a 10 Meg resistor a

11、cross R85. 10.5 SET OUTPUT GAIN CONTROL. Connect input to LINE XLR. Set Meter Switch to INPUT. Note Meter reading. Set Meter Switch to OUTPUT. Vary OUTPUT GAIN control to Null the difference between INPUT & OUTPUT If OUTPUT GAIN pot is not centre remove and fe-align control knob. Note: If the readin

12、g is out by 1 dBu then select the value of R2030n Main PCB. The OUTPUT GAIN pot must remain in this position throughout the Test. 11.0 CALffiRAllON. Signal In = 0.0 dBu to LINE XLR Signal Out from Output XLR Set Analyser Filter to ON. 11.1 LINE INPllT GAIN. INPUT Switch to LINE. Set RV4 for 0.0 dBu.

13、 INPUT GAIN pot variation = +/- 21 dBu. 11.2 COMPRESSOR GAIN. Select COMP IN. Set RV8 for 0.0 dBu. 11.3 EQ GAIN. Select EQ IN. Set RV9 for 0.0 dBu. 11.4 EQ-PRE. Set LM & HM pots to Ma.x. Scope via hole just left of C88, note amplitude. Select EQ-PRE to On. Observe increase in signal by at least 4X.

14、Set LM & HM to mid-position. Set EQ-PRE to Off. 11.5 Hm-. & NOISE. M(JTE the Output of the Signal Generator. The output value should read -80 dI:3u or better. Revision Histo From Serial Number: 550001 To Serial Number: RadioFans.CN 收音机爱 好者资料库 . .,- : ,i- TEST SPECIFICATION: TL Audio IVORY 5051 VOICE

15、 PROCESSOR Ref. Number: TS5051 Issue 1. Page 4 of 5 Tolerallce on inputs +/- 0.3 dBu, outputs +/- I dBu, unless otllerwise stated Tests must be perfOffiled in sequence, with controls changed as indicated, 11.6 MIC INPUT. Signal In = -60 dBu to MIC XLR. INPUT Switch to MIC +48v. Set INPUT GAIN contro

16、l to Maximum. Check for 0.0 dBu +/- 2.0 dBu. Select INPUT Switch to MIC position. Check for 0.0 dBu +/- 2.0 dBu. 11.7 MIC NOISE Return Signal In to LINE XLR. Connect 150R resistor across MIC XLR pins 2 & 3. Check for a change in value of -67 dBu or better. 11.R INSTRUMENT INPUT. Signal In = -20 dBu

17、to Front Panel Jack Socket.(Single Pole) Set INPUT Switch to INST position. Set INPUT GAIN to mid-position. . Check for -6.0 dBu +/- 1.0 dBu. 11.9 UNBAL IN/OUT. Signal In = -20 dBu to Rear Panel Unbal Input.(Singie Pole) Signal Out from Rear Panel Unbal Output.(Double Pole) Set INPUT Switch to LINE

18、position. Check for -20 dBu +/- 1.0 dBu. 11.10 90Hz Filter. Signal In = 0.0 dBu 90Hz to Input XLR Signal Out from Output XLR Note value with 90Hz switch OUT. Press 90Hz switch IN. Value should drop by -3 dBu. Leave 90Hz switch OUT. 11.11 DISTORTION Set Signal In to 1kHz. Set Analyser to read THD+N(%

19、). Check for a value better than 0.2%. Set Signal In to 100 Hz. Set THRESHOLD & RATIO controls Clockwise. Check for a value better than 2.0%. Set THRESHOLD & RATIO controls Anti-clockwise. Return Analyser to read dBu. 11.12 NOMINAL GAIN. Set Rear Panel INPUT GAIN switch to IN. Check for a reading of

20、 -14 dBu. Set Rear Panel INPUT GAIN switch to OUT. 11.13 DRIVE /PEAKLEDs. Set Signal Into +2.0 dBu. Check that DRIVE LED is Off. Set Signal In to +6.0 dBu. Check that DRIVE LED is just ON. Set Signal In to + 16 dBu. Check that DRIVE LED is fully ON. Set Signal In to +25 dBu. Check that PEAK LED is O

21、N. Set Signal In to + 15 dBu. Check that PEAK LED is OFF. Increase OUTPUT GAIN control PEAK LED comes ON. The reading should be +25 dBu +/- 1.0 dBu. Set Signal In to 0.0 dBu. Vary OUTPUT GAIN control so the reading is 0.0 dBu. Revision Histo, From Serial Number: 550001 To Serial Number: ,- -c- - t?

22、4. _f,-:OO TEST SPECIFICATION: TL Audio IVORY 5051 VOICE PROCESSOR Ref Number: TS5051 Issue 1, Page 5 of5 ToloJf3llce on Ulputs +/- 0.3 dEll, outputs +/- I dBu. unless otllerwise stated Tests must be perfonned ill sequence, witl1 controls Ch31lged as indicated, 11.14 COMPRESSOR THRESHOLD, Signal In

23、= +4.0 dBu. Set THRESHOLD & RATIO controls clockwise. Set RV2 for -9.0 dBu. 11.15 METERCALffiRATION. SetnIRESHOLD control anti-clockwise. Set RV5 for Zero dBu on Meter. Set OU1PUT Switch to GR(Gain Reduction). RV7 & RV6 are interactive. Set RV7 for Zero dBu on Meter, Set THRESHOLD control clockwise.

24、 Set RATIO until reading is -2.0 dEu. Set RV6 for -6 dBu on Meter. Set THRESHOLD control anti-clockwise and check Meter reads Zero Repeat RV7 and RV6 until Meter readings are correct. 11.16 GAIN MAKE-UP. Set nIRESHOLD anti-clockwise and GMU clockwise. Check reading is 22.0 dEu +/- 2.0 dBu. Set all C

25、ompressor pots fully anti-clockwise. Set COMP IN to Off. 12.0 SWEEP TESTS. The tests may be carried out using a sweep Function Generator/Analyser, for each of the frequency settings.(LF/LM/HM/HF min & max). Or by determining the minimax values at the selected frequency manually. See Manual for Sweep

26、 examples. 13.0 GATE TEST. Set the GATF/EXPANDER control to the -40 dBu position. Set Signal In to -40 dEu. Check GATE LED is OFF. Check for a reading of -40 dEu +/- 2.0 dBu. Set Signal In to -44 dEu. Check GATE LED is ON. Set Signal In to -20 dEu. Check GATE LED is OFF. Check for a reading less tha

27、n -80 dBu. Set the GATFJEXPANDERcontrol clockwise until the GATE LED comes ON. Check the control position is -20 dBu +/- 5.0 dBu. Remove Input XLR lead from LINE XLR. Set the GA TE/EXP ANDER control to OFF. Check GATE LED is OFF. Set the GATE/EXPANDERcontrol clockwise until the GATE LED comes ON. Check the control position is between OFF and -40 dBu. - Revision Histo From Serial Number: 550Q() To Serial Number: