Studer-928-Service-Manual-Section-2电路原理图.pdf

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1、RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 1.913.101-.108/.321-.324/.605-.610 Date printed: 12.06.2002 10.27.1481 (0602) VU/PPM Meters 1 VU/PPM LED Level Meter Modules Contents 1 General.2 2 Functional Description.3 3 Technical Specifications.3 4 Block Diagram .4 5 Alignment.4 Diagrams PCB No.

2、Diagram Component Layout Parts List VU/PPM 30 LED with GRM 1.913.293.00 1.913.293.00 VU/PPM 30 LED 1.913.294.00 1.913.293.00 1.913.293.00 1.913.294.00 LED PPM Meter (10 LED) 1.913.291.00 1.913.291.00 1.913.291.00 1.913.291.00 Scope of Validity These instructions apply to the following assemblies: Di

3、splay 1 Channel, dark front panel 2 Channels, dark front panel 2 Channels, bright front panel 4 Channels, dark front panel PCB No. PPM 1.913.101 1.913.105 1.913.605 1.913.321 1.913.294 VU 1.913.102 1.913.106 1.913.606 1.913.322 1.913.294 PPM w. GRM 1.913.103 1.913.107 - 1.913.323 1.913.293 VU w. GRM

4、 1.913.104 1.913.108 - 1.913.324 1.913.293 PPM w. additional small level meter - - 1.913.610 - 1.913.294, 1.913.291 1.913.101-.108/.321-.324/.605-.610 2 VU/PPM Meters 10.27.1481 (0602) Date printed: 12.06.2002 1 General The Level Meter units with 30 LEDs have been developed for installation in the d

5、isplay panel of Studer Mixing Consoles. Instruments with VU (vol- ume unit) and PPM (peak program meter) characteristics, with or without gain reduction meter (GRM) are available. Instead of bar-graph indication, also dot indication is optionally available. The instruments listed below are equipped

6、with the PCBs 1.913.294 (VU or PPM) or 1.913.293 (VU or PPM with gain reduction meter) according to the table above. Please consult the circuit diagram relating to the corre- sponding assembly number. VU Meters PPM Meters 20 10 dB GRM 20 dB 10 7 5 3 2 1 0 1 2 3 + VU 100 80 40 60 20 % 20 0 dB GRM 20

7、dB 10 7 5 3 2 1 0 1 2 3 + VU 00 80 40 60 20 % 00 8080 40 60 20 % 20 0 dB GRM 20 dB 10 7 5 3 2 1 0 1 2 3 + VU 00 80 40 60 20 % 20 0 dB GRM 20 dB 10 7 5 3 2 1 0 1 2 3 + VU 00 80 40 60 20 % 20 10 dB GRM 20 dB 10 7 5 3 2 1 0 1 2 3 + VU 100 80 40 60 20 % 20 0 dB GRM 20 dB 10 7 5 3 2 1 0 1 2 3 + VU 00 80

8、40 60 20 % 00 20 10 dB GRM dB 12 + PPM 20 0 dB GRM 20 0 dB GRM 20 0 dB GRM 20 10 dB GRM 20 0 dB GRM 6 0 6 12 18 24 dB 12 + PPM 6 0 6 12 18 24 dB 12 + PPM 6 0 6 12 18 24 dB 12 + PPM 6 0 6 12 18 24 dB 12 + PPM 6 0 6 12 18 24 dB 12 + PPM 6 0 6 12 18 24 20 dB 10 7 5 3 2 1 0 1 2 3 + VU 100 80 40 60 20 %

9、100 8080 40 60 20 % 100 dB 12 + PPM 6 0 6 12 18 24 dB 12 + PPM 6 0 6 12 18 24 7 + 3 + 2 + 1 0 1 3 5 0 20 dB + 3 + 2 + 1 0 1 3 5 0 20 dB 1.913.102 * 1.913.104 1.913.106 * 1.913.108 1.913.322 * 1.913.324 1.913.101 * 1.913.103 1.913.105 * 1.913.107 1.913.321 * 1.913.323 * Versions without gain reductio

10、n meter (GRM) 1.913.606 * 1.913.605 *1.913.610 * 4040120 170 170 4040120 40 4040 190 190 1.913.101-.108/.321-.324/.605-.610 Date printed: 12.06.2002 10.27.1481 (0602) VU/PPM Meters 3 2 Functional Description PPM: The peak program meter is a quasi-peak value instrument with long decay time. When a si

11、gnal voltage corresponding to a level of 0 dB is applied for 10 ms, the resulting indication is 1 dB. Decay time (0 to 20 dB) is 1.7 s. VU Meter: The VU meter indicates signals according to the standard defined by ANSI 1954. When a signal with a duration of 300 ms is applied, the indication is 99% o

12、f the reference value. Rise and decay times on a VU meter are iden- tical. The factory-set lead is +6 dB. Gain Reduction Meter: When the limiter/compressor is switched on, the GRM indicates the magni- tude of the gain reduction. Small PPM: The assembly 1.913.610 contains an additional small PPM mete

13、r with 10 LEDs, normally used for AUX level indication. Bar/Dot Display Selection: On each of the PCBs, selection of bar or dot display mode is provided. All level meters are factory-set to bar display mode; dot display mode is un- usual and recommended only if extra-low current consumption is requi

14、red. PCB No. Bar Display Mode (Default Factory Setting) Dot Display Mode 1.913.293.00 (VU/PPM 30 LED w. GRM) insert: R3, R8, R10, R15 remove: R4, R9, R11, R14 insert: R4, R9, R11, R14 remove: R3, R8, R10, R15 1.913.294.00 (VU/PPM 30 LED) insert: R3, R8, R10 remove: R4, R9, R11 insert: R4, R9, R11 re

15、move: R3, R8, R10 1.913.291.00 (PPM 10 LED) insert jumper JS201 remove jumper JS201 3 Technical Specifications General: 0 dBu 0.775 Vrms Sensitivity for reference indication 1 dBu . +16 dBu Input impedance 10 k Supply 15 VDC +24 VDC Quiescent: 45 mA 35 mA Current consumption without GRM (p. ch., bar

16、 display mode) Full load: 80 mA 80 mA Quiescent: 55 mA 45 mA Current consumption with GRM (p. ch., bar display mode) Full load: 105 mA 105 mA VU Meter (1.913.293): Indication range 20 VU . +3 VU Accuracy (conditions: 10.+3 VU, 0.+50 C, 31.5 Hz.16 kHz) 1 segment Response time to 1 VU 207 ms 30 ms PPM

17、 (1.913.293): Indication range 30 dBu . +15 dBu Accuracy (conditions: 30.+15 VU, 0.+50 C, 31.5 Hz.16 kHz) 1 segment Dynamic behavior 0 dB, 10 ms burst Indication: 1 dB 0.5 dB Jumper normal 0 dB, 3 ms burst Indication: 4 dB 1 dB Jumper fast 0 dB, 100 s burst Indication: 1 dB Decay time: 0.20 dB 1.7 s

18、 0.3 s GRM (1.913.294): Input voltage range min. control: 0 V . +2 VDC max. control: 0 V . +11 VDC Dimensions: 1- and 2-channel units, dark front panel (w h d) 40 170 97 mm 2-channel units, bright front panel (w h d) 40 190 97 mm 4-channel units, dark front panel (w h d) 120 170 97 mm 1.913.101-.108

19、/.321-.324/.605-.610 4 VU/PPM Meters 10.27.1481 (0602) Date printed: 12.06.2002 4 VU/PPM Meter Block Diagram VU/PPM meter block diagram: VU/PPM/PPM FAST and LIN/LOG settings are established with jumpers J2 and J3, respectively. 5 Alignment Required Instruments: AC voltmeter, Ri 20 k DC voltmeter, Ri

20、 100 k AF generator, 31.5 Hz . 16 kHz, 0.16 dBu; attenuator with 10 dB incre- ments. DC/DC Converter Check: Connect DC voltmeter to TP5 (hot) and TP4 (ground). Feed generator out- put signal with line level (1.+16 dBu) to the input (pins 5 and 7 of P1, or TP8 and TP9); all green LEDs are on. DC volt

21、meter reading should be: 3.1 0.1 VDC (supply: +24 VDC), 4.1 0.1 VDC (supply: +30 VDC). Input Range: Feed generator output signal with line level (1 kHz, 1.+16 dBu) to the input (pins 5 and 7 of P1, or TP8 and TP9). Connect AC voltmeter to test points TP1 (hot) and TP4 (ground). Reading must be adjus

22、table with RA3 to 290 10 mVAC for the complete input level range. Line Level: Feed generator output signal with your line level (1 kHz, range: 1.+16 dBu) to the input (pins 5 and 7 of P1, or TP8 and TP9). Adjust RA3 until all green LEDs are on. The red LEDs must be dark. (TP3: 2.5 0.1 VDC). Rectifie

23、r and Indication: Set J2 to VU, J3 to LIN. Feed generator output signal with your line level (1 kHz, usually 0 dBu) to the input (pins 5 and 7 of P1, or TP8 and TP9). Connect AC voltmeter to test points TP1 (hot) and TP4 (ground). Adjust with RA3 to 290 10 mVAC. All green LEDs must be on. Connect DC

24、 voltmeter to test points TP2 (hot) and TP4 (ground); the meter should read 380 15 mVDC. Connect DC voltmeter to test points TP3 (hot) and TP4 (ground); the meter should read +2.575 0.100 VDC. All green LEDs must be on. Check: Set generator output for a DC voltmeter reading of 3.8 0.1 VDC. All LEDs

25、must be on. Set generator output for a DC voltmeter reading of 170 20 mVDC. Only the lowest LED must be on. TP1TP3 TP2 LIN (VU) LOG (PPM) LOG T 213 PPM PPM FAST VU 1.+16 dBu 24.30 VDC3.4.5 VDC (LED) 10 LED red 20 LED grn DC DC 1.913.101-.108/.321-.324/.605-.610 Date printed: 12.06.2002 10.27.1481 (0

26、602) VU/PPM Meters 5 Log Converter (PPM only): Set J2 to PPM, J3 to LOG. Feed generator output signal (1 kHz, +6 dBu) to the input (pins 5 and 7 of P1, or TP8 and TP9). Connect DC voltmeter to test points TP2 (hot) and TP4 (ground). Adjust with RA3 to 1.18 0.05 VDC. RA1 and RA2: Basic setting accord

27、ing to the arrows in the diagram below. Procedure: 1. Upper value setting: Adjust with RA2 to 3.06 0.10 VDC. All green LEDs and four red LEDs must be on (+6 dB indication). 2. Set generator output to 24 dBu (i.e., attenuate the +6 dBu setting from above by 30 dB). 3. Lower value setting: Adjust with

28、 RA1 to 560 20 mVDC. Only the four lowest green LEDs must be on (24 dB indication). 4. These two settings are interdependent, therefore repeat steps 1.3 sev- eral times. GRM (if included): Connect the Meter Unit to the console. Feed a test signal via an input channel. Set the level on the master out

29、put to nominal level +20 dB. Switch the limiter on. Align with RA4 to a GRM indication of 20 dB. 1.913.101-.108/.321-.324/.605-.610 6 VU/PPM Meters 10.27.1481 (0602) Date printed: 12.06.2002 Line Level for 1.913.291: Feed generator output signal with your line level (1 kHz, range: +6.+15 dBu) to the

30、 input (pins 5 and 7 of P201, or TP5 and TP4). Adjust R204 until all green LEDs are on. The red LEDs must be dark. 1.913.101-.108/.321-.324/.605-.610 Date printed: 12.06.2002 10.27.1481 (0602) VU/PPM Meters not used for 1.913.294 not used for 1.913.294 VU/PPM/GRM Meter 1.913.293.00 1.913.101-.108/.3

31、21-.324/.605-.610 VU/PPM Meters 10.27.1481 (0602) Date printed: 12.06.2002 P101.P136, P301.P313 on solder side Component side VU/PPM/GRM Meter 1.913.293.00 Part No.Qty.Type/Val.DescriptionPos.Idx.Part No.Qty.Type/Val.DescriptionPos.Idx. 1.913.101-.108/.321-.324/.605-.610 Page: 1 of 2 VU/PPM/GRM Mete

32、r 1.913.293.00 ( 4) C 159.60.3337100nCER 50V, 10%, X7R, 080501 pce C 259.60.3337100nCER 50V, 10%, X7R, 080501 pce C 359.60.3337100nCER 50V, 10%, X7R, 080501 pce C 459.60.3337100nCER 50V, 10%, X7R, 080501 pce C 559.60.3337100nCER 50V, 10%, X7R, 080501 pce C 659.60.3337100nCER 50V, 10%, X7R, 080501 pc

33、e C 759.60.3337100nCER 50V, 10%, X7R, 080501 pce C 859.60.3337100nCER 50V, 10%, X7R, 080501 pce C 959.60.3337100nCER 50V, 10%, X7R, 080501 pce C 1059.60.3337100nCER 50V, 10%, X7R, 080501 pce C 1159.60.3337100nCER 50V, 10%, X7R, 080501 pce C 1259.60.23731n0CER 50V, 5%, C0G, 080501 pce C 1359.60.22414

34、7pCER 50V, 5%, C0G, 060301 pce C 1459.60.3337100nCER 50V, 10%, X7R, 080501 pce C 1559.60.3337100nCER 50V, 10%, X7R, 080501 pce C 1659.68.0033470uEL 6V, 8.0*10.701 pce C 1759.60.2361330pCER 50V, 5%, C0G, 080501 pce C 1859.68.0033470uEL 6V, 8.0*10.701 pce C 1959.68.0073220uEL 16V, 8.0*10.701 pce C 205

35、9.60.2361330pCER 50V, 5%, C0G, 080501 pce C 2159.68.0033470uEL 6V, 8.0*10.701 pce C 2259.68.0073220uEL 16V, 8.0*10.701 pce C 2359.60.3337100nCER 50V, 10%, X7R, 080501 pce C 2459.60.23731n0CER 50V, 5%, C0G, 080501 pce C 2559.60.23731n0CER 50V, 5%, C0G, 080501 pce C 2659.60.3337100nCER 50V, 10%, X7R,

36、080501 pce C 2759.60.3337100nCER 50V, 10%, X7R, 080501 pce C 2859.60.3337100nCER 50V, 10%, X7R, 080501 pce C 2959.60.23731n0CER 50V, 5%, C0G, 080501 pce C 3059.60.3337100nCER 50V, 10%, X7R, 080501 pce C 3159.60.2369680pCER 50V, 5%, C0G, 080501 pce C 3259.60.3337100nCER 50V, 10%, X7R, 080501 pce C 33

37、59.60.3337100nCER 50V, 10%, X7R, 080501 pce C 3459.68.0073220uEL 16V, 8.0*10.701 pce C 3559.68.0073220uEL 16V, 8.0*10.701 pce C 3659.60.23731n0CER 50V, 5%, C0G, 080501 pce C 3759.60.3337100nCER 50V, 10%, X7R, 080501 pce C 3859.60.3337100nCER 50V, 10%, X7R, 080501 pce C 3959.60.224147pCER 50V, 5%, C0

38、G, 060301 pce C 4059.60.333347nCER 50V, 10%, X7R, 080501 pce C 4159.60.3337100nCER 50V, 10%, X7R, 080501 pce D 150.60.80014448200mA 75V 4ns SOD 8001 pce D 250.60.80014448200mA 75V 4ns SOD 8001 pce D 350.60.80014448200mA 75V 4ns SOD 8001 pce D 450.60.80014448200mA 75V 4ns SOD 8001 pce D 550.60.800144

39、48200mA 75V 4ns SOD 8001 pce D 650.60.80014448200mA 75V 4ns SOD 8001 pce D 750.60.80014448200mA 75V 4ns SOD 8001 pce D 850.60.80014448200mA 75V 4ns SOD 8001 pce DL 150.04.2150MV5716410*LED-Bargraf rot diffus01 pce DL 250.04.2161GRNDLZ MV 54 164,LTA1000G 10*D GN01 pce DL 350.04.2161GRNDLZ MV 54 164,L

40、TA1000G 10*D GN01 pce DL 450.04.2150MV5716410*LED-Bargraf rot diffus01 pce DV 150.60.901710V5%, 0.2W, SOT 2301 pce DV 250.60.901710V5%, 0.2W, SOT 2301 pce DV 350.60.90105V15%, 0.2W, SOT 2301 pce DV 450.04.11125V1Zener, 5%, 0.5W, DO-3541 pce IC 150.11.0119LM3914IC LM 3914 N,01 pce IC 250.11.0119LM391

41、4IC LM 3914 N,01 pce IC 350.11.0119LM3914IC LM 3914 N,01 pce IC 450.11.0119LM3914IC LM 3914 N,01 pce IC 550.61.0204MC33078 Dual Op-Amp low noise01 pce IC 650.61.0207LF353Dual Op-Amp JFET SO 801 pce IC 750.61.0209LF412Dual Op-Amp JFET SO 831 pce IC 850.61.0207LF353Dual Op-Amp JFET SO 801 pce IC 950.6

42、1.0204MC33078 Dual Op-Amp low noise11 pce J 254.01.0021Jumper0.63*0.63mm, Au01 pce J 354.01.0021Jumper0.63*0.63mm, Au01 pce MP 11.913.293.11VU/PPM/GRM METER PCB01 pce MP 21.913.293.10NR.-ETIKETTE 5 * 2001 pce MP 343.01.0108LabelESE-Warnschild01 pce MP 428.99.0119ROHRNIETE D 2.5*0.15* 902 pcs MP 51.0

43、10.057.22M3*7.4Nietmutter sw 601 pce MP 61.010.057.22M3*7.4Nietmutter sw 601 pce MP 71.010.057.22M3*7.4Nietmutter sw 601 pce MP 81.010.057.22M3*7.4Nietmutter sw 601 pce MP 943.10.0113DRevisions-Etikette 5mm hblau41 pce P 154.14.201110pWinkelstecker Au01 pce P 254.11.01362*3pPin 0.63*0.63, RM2.5401 p

44、ce P 354.11.01362*3pPin 0.63*0.63, RM2.5401 pce P 10254.11.01251pPin, 1reihig, winkel01 pce P 10354.11.01251pPin, 1reihig, winkel01 pce P 10454.11.01251pPin, 1reihig, winkel01 pce P 10554.11.01251pPin, 1reihig, winkel01 pce P 10654.11.01251pPin, 1reihig, winkel01 pce P 10754.11.01251pPin, 1reihig, w

45、inkel01 pce P 10854.11.01251pPin, 1reihig, winkel01 pce P 10954.11.01251pPin, 1reihig, winkel01 pce P 11054.11.01251pPin, 1reihig, winkel01 pce P 11154.11.01251pPin, 1reihig, winkel01 pce P 11254.11.01251pPin, 1reihig, winkel01 pce P 11354.11.01251pPin, 1reihig, winkel01 pce P 11454.11.01251pPin, 1reihig, winkel01 pce P 11554.11.01251pPin, 1reihig, winkel01 pce P 11654.11.01251pPin, 1reihig, winkel01 pce P 11754.11.01251pPin, 1reihig, winkel01 pce P 11854.11.01251pPin, 1reihig, winkel01 pce P 11954.11.01251pPin, 1reihig, winkel01 pce P 12054.11.01251pPin, 1reihig, winkel01