Yamaha-TX-396-L-Service-Manual电路原理图.pdf

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1、TX-396L SERVICE MANUAL AM/FM STEREO TUNER TX-396L The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research, engineering, and service departments of YAMAHA are continually striving to improve YAMAHA products. Modifications are, therefore, inevita

2、ble and specifications are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please contact the distributors Service Division. WARNING:Static discharges can destroy expensive components. Discharge any static electricity your body may have accumulated

3、 by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to this buss). IMPORTANT:Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power to the unit. 100700 I CONTENTS TO SERVICE PERSONNEL . 1 SPECIFICATIONS. 1 INTERNAL VIEW .

4、 2 REAR PANELS . 2 DISASSEMBLY PROCEDURES . 2 ADJUSTMENTS . 37 COM DATA . 8 DISPLAY DATA . 9 BLOCK DIAGRAM. 1011 PRINTED CIRCUIT BOARD . 1213 SCHEMATIC DIAGRAM . 1415 PARTS LIST . 1621 This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel. It has been a

5、ssumed that basic service procedures inherent to the industry, and more specifically YAMAHA Products, are already known and understood by the users, and have therefore not been restated. WARNING:Failure to follow appropriate service and safety procedures when servicing this product may result in per

6、sonal injury, destruction of expensive components, and failure of the product to perform as specified. For these reasons, we advise all YAMAHA product owners that any service required should be performed by an authorized YAMAHA Retailer or the appointed service representative. IMPORTANT:The presenta

7、tion or sale of this manual to any individual or firm does not constitute authorization, certification or recognition of any applicable technical capabilities, or establish a principle-agent relationship of any form. IMPORTANT NOTICE TX-396L P.O.Box 1, Hamamatsu, Japan TX-396L 263.511.33.27016 27886

8、 435 WALL OUTLET EQUIPMENT UNDER TEST AC LEAKAGE TESTER OR EQUIVALENT INSULATING TABLE 1 I TO SERVICE PERSONNEL Critical Components Information. Components having special characteristics are marked and must be replaced with parts having specifications equal to those originally installed. WARNING: CH

9、EMICAL CONTENT NOTICE! The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and /or plastic (where applicable) components may also contain traces of chemicals found by the California Health and Welfare Agency (and possibly other entities) to cause

10、 cancer and/or birth defects or other reproductive harm. DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REA- SON WHATSOEVER! Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose eyes to solder/

11、flux vapor! If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handling food. I SPECIFICATIONS I FM SECTION Tuning Range 87.50 to 108.00 MHz 50dB Quieting Sensitivity (IHF) Mono1.55 V(15.1 dBf) Stereo (1 kHz 100% MOD)21 V(37.7 dBf) U

12、sable Sensitivity (DIN) Mono (S/N 26 dB)0.9 V Stereo (S/N 46 dB)24 V Alternate Channel Selectivity Selectivity (two signals) 40 kHz Dev. 300 kHz 70 dB Signal to Noise Ratio (DIN-Weighted 40 kHz) Mono75 dB Stereo70 dB Harmonic Distortion 1 kHz Mono0.1 % Stereo0.2 % Stereo Separetion 1kHz (40 kHz Dev.

13、)50 dB Frequency Response 20 Hz to 15 kHz00.5 dB I MW SECTION Tuning Range 531 to 1611 kHz Usable Sensitivity200 V/m Signal to Noise Ratio50 dB Harmonic Distortion 1 kHz0.3 % I LW SECTION Tuning Range153 to 288 kHz Usable Sensitivity400 V/m Signal to Noise Ratio50 dB Harmonic Distortion 1 kHz0.3 % I

14、 AUDIO SECTION Output Level/Impedance (Fixed) FM 100 % MOD 1 kHz500 mV/2.2 k MW/LW 30 % MOD 1 kHz200 mV/2.2 k I GENERAL Power Supply AC230V, 50Hz Power Consumption7 W Dimensions (W x H x D)435 x 86 x 278mm Weight3.2 kg * Specifications subject to change without notice. DIMENSIONS MODEL COLOR Black a

15、nd Gold TX-396L 2 3456 1 2 I INTERNAL VIEW I REAR PANEL 1 Tuner P. C. B (1) 2 Front-end pack 3 Operation P. C. B. (2) 4 Tuner P. C. B. (2) 5 Operation P. C. B. (1) 6 Operation P. C. B. (3) I DISASSEMBLY PROCEDURES (Remove parts in the order as numbered.) 1. Removal of Top Cover Remove 4 screws (1) a

16、nd 2 screws (2) in Fig. 1. 2. Removal of Front Panel a. Disconnect the connectors (CB3 anf CB4) in Fig. 1. b. Remove 2 plastic rivets (3) in Fig. 1. c. Remove 5 screws (4) in Fig. 1. d. Unhook at 2 place (5) in Fig. 1. TX-396L FM SG Oscilloscope ACVM DIST. M FM ANT L R OUT PUT GND FM dummy antenna T

17、uner P. C. B. FM SG Oscilloscope ACVM DIST. M FM ANT L R YLF-15 (LPF) OUT PUT GND FM dummy antenna Tuner P. C. B. SSG FM SG Oscilloscope ACVM DIST. M FM ANT L R OUT PUT GND FM dummy antenna Tuner P. C. B. oscillator FM SG DCVM FM ANT TP1 TP2 R51 GND FM dummy antenna Tuner P. C. B. oscillator 3 I ADJ

18、USTMENTS 1. Before Adjustment (1)With the power turned on, wait for 5 minutes before starting adjustment so that operation becomes stable. (2)Adjust the OSC coil and IFT with insulated screwdriver. (3)Set the TUNING MODE to AUTO. (4)Decibel abbreviations dB : Decibels above or below 1V Example : 0dB

19、 = 1 v, 60dB = 1 mV X dB = (X + 11.2) dBf When substituting 60 for X, 60 dB = 72.2 dBf 2. Measuring instrument abbreviations FM SG: FM signal generator SSG: Stereo signal generator AM SG: AM signal generator DIST. M: Distortion meter FC: Frequency counter ACVM: AC voltage meter DCVM: DC voltage mete

20、r Check that the voltage obtained across each test point and ground on the tuner circuit is as follows. Test pointsRating or Standard +5 V terminal+5.6 0.5 V -VP terminal-23.0 1.0 V CAUTION : Before setting to the TEST mode, write down the user preset memory content in the table as shown below. (Thi

21、s is because setting to the TEST mode will cause the memory content to be the factory preset memory content, i.e. all the user preset memory content will be erased.) Preset keysP1P2P3P4P5P6P7P8 A B C D E Turn on the POWER switch while pressing the A/B/C/D/ E and FM/AM(FM/MW/LW) keys simultaneously,

22、and the unit enters the TEST mode for the display check. After this, repeat (1) to (4). (1)All the segments on the display light up. (2)The model name, TX-396L is displayed. (3)The place of destination is displayed. (4)The COM-version is displayed. Pressing the P1 key will cause operation to start f

23、rom (1). Pressing any other key will cause the mode to return to the NORMAL mode. PresetP1P2P3P4P5P6P7P8 A, E87.5090.1095.1098.10108.0088.10106.10 108.00 B, D63010801440531161190013501404 C153171225270288180207252 1) Discriminator balance adjustment 2) Monaural distortion adjustment 3) Stereo distor

24、tion adjustment 4) Sensitivity verification TX-396L LINE OUTAM ANT GNDFM ANT LR L13 L12 VR4 VR3 R51 J6 J7 VR2 VR1 L10 L5 L8 PK2 PK1 J73 TP2 TP1 TP3 DISCRIMINATOR BALANCE MONAURAL DISTORTION FRONTEND IFT STEREO DISTORTION AM SENSITIVITY SEPARATION SIGNAL METER G TEST POINTS 4 Adjustment item Rough ad

25、justment of discriminator balance. Rough adjustment of monaural distortion. Fine adjustment of discriminator balance. Fine adjustment of monaural distortion. Verification of discriminator balance. Adjustment of frontend IFT. Adjustment of stereo distortion. Step 1 2 3 4 5 6 7 Signal (ANT IN) FM SG:

26、98.1 MHz 70 dB Modulation : 100 % Monaural : 1 kHz Same as Step 1. Same as Step 1. Same as Step 1. Same as Step 1. FM SG: 98.1 MHz 30 dB Modulation : 100 % Monaural : 1 kHz FM SG: 98.1 MHz 70 dB Modulation : 100 % Stereo L or R : 1 kHz Adjusted point L8 (right side) L8 (left side) L8 (right side) L8

27、 (left side) Frontend IFT VR1, VR2 Reception frequency Preset A-4: 98.1 MHz Same as Step 1. Same as Step 1. Same as Step 1. Same as Step 1. Same as Step 1. Same as Step 1. Rating DC 0 V 100mV at tuning point. Minimize distortion. DC 0 V 50mV Minimize distortion. (to less than 0.7%) DC 0 V 50mV Adjus

28、t so that the DC voltage is maximum. CAUTION: If IFT core is turned excessively, the sensitivity reduces. (Maximum 90) Minimize distortion. Tuning mode is AUTO. Test point TP1, TP2 (both end of R51) OUTPUT TP1, TP2 OUTPUT TP1, TP2 TP3, GND OUTPUT TX-396L 5 Adjustment item Verification of monaural di

29、stortion. Verification of stereo distortion. Verification of sensitivity. Adjustment of separation. Adjustment of the signal meter. Verification of the signal meter to turn off. Verification of AUTO TUNING. Step 8 9 10 11 12 13 14 Signal (ANT IN) FM SG: 98.1 MHz 70 dB Modulation : 100 % Monaural : 1

30、 kHz FM SG: 98.1 MHz 70 dB Modulation : 100 % Stereo L or R : 1 kHz FM SG: 88.1/98.1/106.1 MHz Modulation : 100 % Monaural : 1 kHz FM SG: 98.1 MHz 70 dB Modulation : 100 % Stereo L or R : 1 kHz FM SG: 98.1 MHz 45 dB Modulation : 30 % Monaural : 1 kHz ANT input minimum. FM SG: 98.1 MHz 23 dB Modulati

31、on : 30 % Stereo L or R : 1 kHz Adjusted point VR4 VR3 Tuning buttons Reception frequency Same as Step 1. Same as Step 1. A-6: 88.1 MHz A-4: 98.1 MHz A-7: 106.1 MHz Preset A-4: 98.1 MHz Preset A-4: 98.1 MHz Preset A-4: 98.1 MHz Rating Minimize distortion. (to less than 0.7%) Minimize distortion. (to

32、 less than 1.4%) Tuning mode is AUTO. S/N should be 30 dB at each frequency of 88.1 MHz, 98.1 MHz and 106.1 MHz. Make sure that the voltage at the ANT terminal is 7 dB or less. To more than 35 dB. Tuning mode is AUTO. Adjust so that the signal meter is maximum at rating level. Make sure that the sig

33、nal meter is turned off. Automatic reception should be available when the tuning UP or DOWN key is pressed. Stereo indicator is turned on. Audio muting should be applied during tuning. Test point OUTPUT OUTPUT OUTPUT Signal meter TX-396L 6 AM SG AM ANT GND AM dummy antenna AM loop antenna To be adju

34、sted after FM section adjustment. Use the specified dummy anetenna for loop antenna. Adjustment item Adjustment of sensitivity. Verification of sensitivity. Verification of the signal meter. Verification of auto tuning. Step 1 2 3 4 Signal (ANT IN) AM SG: 630 kHz 50 dB, 1 kHz, 30% modulation AM SG:

35、630 kHz/1080 kHz/ 1440 kHz 50 dB, 1 kHz, 30% modulation AM SG: 1080 kHz 90 dB, ANT input 90 dB ANT input -10 dB or less AM SG: 1080 kHz 60 dB, 1 kHz, 30% modulation Adjusted point L5 Tuning button Reception frequency Preset B-1: 630 kHz Preset B-1: 630 kHz B-2: 1080 kHz B-3: 1440 kHz Preset B-2: 108

36、0 kHz Preset B-2: 1080 kHz Rating Maximize detected signal output. To be less than 54 dB. Make sure that the signal meter is turned on. Make sure that the signal meter is turned off. Automatic reception should be available when the tuning UP or DOWN key is pressed. Audio muting should be applied dur

37、ing tuning. Test point OUTPUT TX-396L AM SG AM ANT GND AM dummy antenna AM loop antenna 7 Adjustment item Verification of sensitivity. Verification of the signal meter. Verification of auto tuning. Step 1 2 3 Signal (ANT IN) AM SG: 171 kHz/225 kHz/270 kHz 90 dB, 1 kHz, 30% modulation AM SG: 225 kHz

38、90 dB, ANT input 90 dB ANT input -10 dB or less AM SG: 225 kHz 60 dB, 1 kHz, 30% modulation Adjusted point Tuning button Reception frequency Preset C-2: 171 kHz C-3: 225 kHz C-4: 270 kHz Preset B-2: 225 kHz Preset B-2: 225 kHz Rating To be less than 66 dB. Make sure that the signal meter is turned o

39、n. Make sure that the signal meter is turned off. Automatic reception should be available when the tuning UP or DOWN key is pressed. Audio muting should be applied during tuning. Test point OUTPUT To be adjusted after MW section adjustment. Use the specified dummy anetenna for loop antenna. TX-396L

40、I-COM DATA IC501 : LC866420A 8 bit -COM 8 No.PortI/ONameFunction 1P17/PWM0O/MMUTEMain mute 2P30IROT1Rotary encoder input 3P31IROT0This input available for ROTSW=H 4P32IMODELModel 0 5P33IROTSWRotary encoder yes(H) or no(L) 6P70/INT0I 7/RESI/RESETReset 8/P74/XT1I 9P75/XT2I 10VSS1IGNDGND 11CF1CF6MHz 12

41、CF2CF6MHz 13VDD1IVDD+5V 14P80/AN0ADIKEYIN1AD key input 15P81/AN1ADIKEYIN2AD key input 16P82/AN3ADIKEYIN3AD key input 17P83/AN3ADIMETERSignal level input 18P84/AN4I 19P85/AN5I 20P86/AN6I 21P87/AN7ADIVERVersion input 22P71/INT1I 23P72/INT2I/POWERDOWNPower down detect 24P73/INT3IREMREM input 25S0/T0O13

42、GFL segment 26S1/T1O12GFL segment 27S2/T2O11GFL segment 28S3/T3O10GFL segment 29S4/T4O9GFL segment 30S5/T5O8GFL segment 31S6/T6O7GFL segment 32S7/T7O6GFL segment 33S8/T8O5GFL segment 34S9/T9O4GFL segment 35S10/T10O3GFL segment 36S11/T11O2GFL segment 37S12/T12O1GFL segment 38S13/T13 39S14/T14 40S15/T

43、15 No.PortI/ONameFunction 41VDD2IVDD+5V 42VPIVDDVPP24V 43S16/PC0OP1FL segment 44S17/PC1OP2FL segment 45S18/PC2OP3FL segment 46S19/PC3OP4FL segment 47S20/PC4OP5FL segment 48S21/PC5OP6FL segment 49S22/PC6OP7FL segment 50S23/PC7OP8FL segment 51S24/PD0OP9FL segment 52S25/PD1OP10FL segment 53S26/PD2OP11F

44、L segment 54S27/PD3OP12FL segment 55S28/PD4OP13FL segment 56S29/PD5OP14FL segment 57S30/PD6OP15FL segment 58S31/PD7O 59S32/PE0I/O 60S33/PE1I/O 61S34/PE2I/O 62S35/PE3I/O 63S36/PE4I/O 64S37/PE5I/O 65P00O 66P01O 67P02O 68P03O 69P04O/TMUTETuner mute 70P05O 71P06O 72P07O 73VSS2IGNDGND 74P10/S00O 75P11/SI

45、0SIN 76P12/SCK0SCL 77P13/SO1IPLLDAT-inData input from PLL 78P14/SI1OPLLDAT-outData output for PLL 79P15/SCK1OPLL-CLKPLL clock 80P16/BUZOPLLCEPLLCE KEY INPUT Key Input1234567 Resistance ()0k1.8k2.7k3.9k6.8k13k39k Extent of AD00H15H16H3DH3EH64H65H8AH8BHB0HB1HD3HD4HF0H Extent of Voltage (V)0.000.410.41

46、1.191.191.951.952.702.703.443.444.124.124.69 Pin No.14KEYIN1P3P4P5P6P7P8 Pin No.15KEYIN2MODEEDIT (KMODE)MEMORYPAGEP1P2 Pin No.16KEYIN3FM/AM (MW/LW)TUNING DOWNTUNING UP TX-396L 13G12G11G10G9G8G7G6G5G4G3G2G1G P1PRESETaaaaaaaaaaaAUTO P2 MEMO bbbbbbbbbbb kHz P3 (PS) ccccccccccc MHz P4 PS ddddddddddd ST

47、P5 (PTY) eeeeeeeeeee B1 P6 PTY fffffffffffB2 P7(RT)gggggggggggB3 P8RThhhhhhhhhhhB4 P9(CT)jjjjjjjjjjjB5 P10CTkkkkkkkkkkkB6 P11EONmmmmmmmmmmmS1 P12NEWSnnnnnnnnnnnEDIT P13INFOpppppppppppPTY HOLD P14 AFFAIRS rrrrrrrrrrr P15 SPORT ttttttttttt PIN NO.123456789101112131415161718 CONNECTIONF1F1NPP15 P14 P13 P12 P11 P10P9P8P7P6P5P4P3P2P1 PIN NO.1920212223242526272829303132333435 CONNECTIONNC1G2G3G4G5G6G7G8G9G 10G 11G 12G 13GNPF2F2 9 I DISPLAY DATA (13-BT-152GK) ANODE CONNECTION PIN CONNECTION NOTE: 1) F1, F2 . Filament 2) NP. No pin