Sony-TCTX5-tape-sm维修电路原理图.pdf
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1、MICROFILM TC-TX5 STEREO CASSETTE DECK AEP Model UK Model E Model Tourist Model SERVICE MANUAL Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation. “DOLBY” and the double-D symbol a are trademarks of Dolby Laboratories Licensing Corporation. Model Name Using
2、 Similar MechanismTC-S1 Tape Transport Mechanism TypeTCM-9700HLD SPECIFICATIONS Recording system4-track 2-channel stereo Frequency response(DOLBY NR OFF) 30 14,000 Hz (3 dB), using Sony TYPE I cassette 30 15,000 Hz (3 dB), using Sony TYPE II cassette Wow and flutter0.15% W. Peak (IEC) 0.1% W. RMS (N
3、AB) 0.2% W. Peak (DIN) InputTAPE IN (phono jacks): impedance 47 kilohms OutputTAPE OUT (phono jacks): voltage 550 mV impedance 47 kilohms General Power requirementsAEP, UK, Germany: 220 230V AC, 50/60 Hz Other countries: 110 120V or 220 240 V AC, 50/60Hz Adjustable with the voltage selector Power co
4、nsumption10 W DimensionsApprox. 280 85 360 mm (111/8 33/8 141/4 in) (w/h/d) incl. projecting parts and controls MassApprox. 3.7 kg (8 lb 3 oz) Supplied accessories: Audio connecting cord (2) AU BUS connecting cord (1) Design and specifications are subject to change without notice. RadioFans.CN 收音机爱
5、好者资料库 RadioFans.CN 收音机爱 好者资料库 3 SECTION 2 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. CASEFRONT PANEL SECTION LOADING PANELMECHANISM DECK 2Remove the loading panel to direction of the arrow B. B 1Rotate the gear to direction of the arrow A. 1two screws (BVTT2.6 8
6、) 3two screws (BV3 8) 2bracket 7mechanism deck 5connector (CN804) 4four screws (BV3 8) 6two claws 5two connectors (CN351, 803) 1two screws (CASE 3 TP2) 2case 1two screws (CASE 3 TP2) 1screw (BV3 8) 2flat wire (CN802) 3front panel section 1screw (BV3 8) 1three screws (BV3 8) A 4 PRECAUTION 1.Clean th
7、e following parts with a denatured-alcohol-moistened swab: record/playback/earth headpinch roller rubber beltscapstan idlers 2.Demagnetize the record/playback head with a head demagne- tizer. (Do not bring the head demagnetizer close to the erase head.) 3.Do not use a magnetized screwdriver for the
8、adjustments. 4.After the adjustments, apply suitable locking compound to the parts adjusted. 5.The adjustments should be performed with the rated power sup- ply voltage unless otherwise noted. Torque Measurement SECTION 3 MECHANICAL ADJUSTMENTS ModeTorque MeterMeter Reading CQ-102C 30-65 gcm FWD (0.
9、42-0.90 ozinch) FWD1.5-6 gcm Back tension(0.021-0.083 ozinch) CQ-102RC 30-65 gcm REV (0.42-0.90 ozinch) REV1.5-6 gcm Back tension(0.021-0.083 ozinch) 70-130 gcm FF, REWCQ-201B (0.98-1.80 ozinch) SECTION 4 ELECTRICAL ADJUSTMENTS Note: The adjustment should be performed in the order given in the servi
10、ce manual. As a rule, adjustments about playback should be performed before those about recording. The adjustments should be performed before for both L-CH and R-CH. Switches and controls should be set as follows unless otherwise specified. DOLBY NR switch: OFF DIRECTION switch : A 0 dB=0.775 V Test
11、 Tape TypeSignalUsed for P-4-A10010 kHz, 10 dBAzimuth Adjustment P-4-L300315 Hz, 0 dBPlayback Level Adjustment WS-48B3 kHz, 0 dBTape Speed Check Test Mode This set will get into test mode by shorting the pins of CN801 (2P) on MAIN board before turning the power on. 5 Record/Playback Head Azimuth Adj
12、ustment Procedure: 1.Mode : REV playback 2.Turn the adjustment screw for the maximum output levels. If these levels do not match, turn the adjustment screw until both of output levels match together within 1 dB. Screw position L-CH peak within 1dB output level L-CH peakR-CH peak within 1dB angle R-C
13、H peak 3.Phase Check Mode : playback + VH + Screen pattern GoodWrong in phase 4590135180 LINE OUT set R-CH L-CH47 k 47 k oscilloscope test tape P-4-A100 (10 kHz, 10 dB) + set 47 k LINE OUT level meter Test tape P-4-A100 (10 kHz, 10 dB) 4.Set in the FWD mode and repeat the step 1 to 3. 5.After the ad
14、justment, lock the screw with locking compound. Adjustment Location: Record/Playback head FWD sideREV side Adjustment screw Tape Speed Adjustment Procedure: Mode: FWD playback + set LINE OUT frequency counter test tape WS-48B (3 kHz, 0 dB) 47 k 1. Set to FWD playback mode. 2. Adjust RV801 so that th
15、e frequency counter reading becomes 2,980 30 Hz. 3. Confirm that the deviation between tape top and tape end is within 3%. Playback Level Adjustment Procedure: Mode: FWD playback Adjust RV151 (L-CH) and RV251 (R-CH) so that the reading on level meter meets the adjustment limits below. Adjustment Lim
16、its: LINE OUT level: 4.70.5 dB (0.43 to 0.48 V) Level difference between channels: within 2 dB Check that the LINE OUT level does not change even if Playback and Stop operation is repeated several times. Adjustment Location: DECK board Adjustment Location: DECK BOARD (Component side) + set LINE OUT
17、47 k test tape P-4-L300 (315 Hz, 0 dB) level meter IC305 CN352 T351 RV252 Record BIAS(R-CH) RV152 Record BIAS(L-CH) RV251 Playback Level(R-CH) RV151 Playback Level(L-CH) 6 set AF OSC Attenuator 600 10 k blank tape CS-123 LINE IN 1) 315 Hz 2) 10 kHz 67 mV (21.3 dB) Record BIAS Adjustment Procedure: 1
18、.Mode : record 2.Mode: playback Record Level Adjustment Procedure: 1.Mode : record 2.Mode: playback + set LINE OUT 47 k recorded portion level meter 3.Confirm playback the signal recorded in step 1 become adjust- ment level as follows. 4.If these levels do not adjustment level, adjust the RV152 (L-
19、CH) and RV252 (R-CH) to repeat step 1 and 2. Adjustment Level:Playback output of 10 kHz to playback out- put of 315 Hz: 0.5 dB. Adjustment Location: DECK board MAIN BOARD (Component side) CN803 IC304 CN802 RV801 Tape Speed CN801 TEST mode RV253 Record Level(R-CH) RV153 Record Level(L-CH) 3.Confirm p
20、layback the signal recorded in step 1 become adjust- ment level as follows. 4.If these levels do not adjustment level, adjust RV153 (L-CH) and RV253 (R-CH) to repeart step 1 and 2. Adjustment Level:21.30.5 dB (63 to 71 mV) Adjustment Location: MAIN board + set LINE OUT 47 k recorded portion level me
21、ter set AF OSC Attenuator 600 10 k blank tape CS-123 LINE IN 315 Hz, 67 mV ( 21.3 dB) SECTION 5 DIAGRAMS 7 5-1.IC PIN FUNCTION DESCRIPTION MAIN BOARD IC101 M38172M4-180FP (SYSTEM CONTROL) Pin No.Pin NameI/OFunction 1 Not used (Fixed at “L”) 2 3KEY-XI Key input (A/D convert input) *1 4KEY-YI 5FWD TAB
22、IREC proof detection input from S902 (FWD side)“H”: Not nail 6CHROM SWITape type detection input from S903“L”: Type I 7RVS TABIREC proof detection input from S904 (REV side)“H”: Not nail 8Not used (Fixed at “L”) 9PLAY SWIPlayback and stop detection input from S907“L”: Playback 10TEST MODEITest mode
23、terminalNormal: “H”Test mode: “L” 11POWER OUTOAudio and mechanism power on/off output“L”: Off (Not used) 12POWER INIPrimary power on/off input“H”: On 13CLOSEO Loading motor (M901) drive output *2 14OPENO 15 16 17 Not used (Fixed at “L”) 18 19 20 21(CLOCK)ONot used (Open) 22(DATA)ONot used (Fixed at
24、“H”) 23RELAYORelay drive output“L”: ON 24BIASOControl output to recording bias switch (Q352)“L”: ON 25AU BUS OUTOAudio bus output 26AU BUS INIAudio bus input 27RESETIReset input 28X CININot used (Fixed at “L”) 29X COUTONot used (Open) 30X INIMain system clock input (4 MHz) 31XOUTOMain system clock o
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