SONY PCM-M1电路图 维修原理图.pdf

PCM-M1 SERVICE MANUAL DIGITAL AUDIO TAPE RECORDER MICROFILM Model Name Using Similar MechanismTCD-D100 Tape Transport Mechanism TypeMT-D100-128 t w AEP Model US Model SPECIFICATIONS TapeDigital audio tape Recording timeStandard: 120minutes Long-play mode: 240minutes (with DT-120) Sampling frequency48kHz, 44.1kHz, 32kHz QuantizationStandard: 16-bit linear Long-play mode: 12-bit non linear Frequency responseStandard: Fs 48kHz 20-22,000Hz (1.0dB) (LINE IN) Fs 44.1kHz 20-20,000Hz (1.0dB) (LINE IN) Fs 32kHz 20-14,500Hz (1.0dB) (LINE IN) Long-play mode: Fs32kHz 20-14,500Hz (1.0dB) (LINE IN) Signal to noise ratioStandard: more than 87dB Long-play mode: more than 87dB (1kHz IHF-A, LINE IN) Dynamic rangeStandard: more than 87dB (1kHz IHF-A, LINE IN) Total harmonic distortionStandard: less than 0.008% (1kHz, 22kHz LPF, LINE IN) Long-play mode: less than 0.09% (1kHz, 22kHz LPF, LINE IN) Wow and flutterBelow measurable limit (less than 0.001% W.PEAK) Input Output Input/OutputDIGITAL REMOTE I/O jack (special jack) Jack type stereo minijack Impedance MIC 4.7k LINE IN 47k Rated input level MIC 1.4mV LINE IN 500mV Minimum input level MIC 0.3mV LINE IN 120mV MIC/ LINE IN Jack type stereo minijack Impedance 220 16 Rated output 500mV 87mV Minimum output level 15mW+15mW LINE OUT REMOTE /2 Load impedance 10k 16 Digital input/ output, remote control operation and timer-activated operation is possible by connection with an adaptor kit to this jack. Power requirements Two R6 (size AA) alkaline batteries (not supplied) Two nickel metal hydride rechargeable battery (Supplied) DC IN 4.5V jack accepts: the Sony AC power adaptor AC-E45HG (Supplied) the car battery cord DCC-E245 (not supplied) for use with 12V/24V car battery. Battery lifeSee “Replacing the batteries” (page 11). Power consumption0.9W DimensionApprox. 80117.329.2mm (31/4 45/8 13/16 in) (w/h/d) not incl. projecting parts and controls MassMain unit: Approx. 290g (10.3oz) When using the main unit: Approx. 395g (14oz.) incl.headphones with remote control, rechargeable batteries and a cassette Supplied accessories AC power adaptor (1) Charger adaptor (1) Nickel Metal Hydride Rechargeable battery NH-D100 (2) Headphones with a remote control (1) DAT cleaning cassette (1) Microphone plug adaptor (monaural phone jack 2 stereo miniplug) (1)* Optical cable (special jack rectangular-shaped optical input/output) (1)* Battery carrying case (1) Carrying case (1) * Supplied only to the European model. Design and specifications are subject to change without notice. Ver 1.2 1999. 04 2 TABLE OF CONTENTS 1.GENERAL3 2.DISASSEMBLY 2-1.PANEL ASSY, LOWER 14 2-2.MAIN BOARD 14 2-3.LID ASSY, CASSETTE 15 2-4.PC BOARD UNIT, SYSTEM CONTROL 15 2-5.CABINET16 2-6.BRACKET ASSY, MD 16 2-7.CHASSIS ASSY17 2-8.DRUM ASSY 17 3.ADJUSTMENTS 3-1.ADJUSTMENTS 18 3-2.MECHANICAL ADJUSTMENTS 23 3-3.ELECTRICAL ADJUSTMENTS 24 4.DIAGRAM 4-1.BLOCK DIAGRAM MD SECTION 26 4-2.BLOCK DIAGRAM AUDIO SECTION 29 4-3.IC BLOCK DIAGRAM 31 4-4.PRINTED WIRING BOARD 34 4-5.SCHEMATIC DIAGRAM MAIN SECTION 39 4-6.SCHEMATIC DIAGRAM AUDIO SECTION 42 4-7.IC PIN FUNCTION 45 5.EXPLODED VIEWS 5-1.CABINET SECTION49 5-2.CASSETTE HOLDER SECTION 50 5-3.MACHANISM SECTION 1 51 5-4.MACHANISM SECTION 2 52 6.ELECTRICAL PARTS LIST53 Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be damaged by heat. Flexible Circuit Board Repairing Keep the temperature of soldering iron around 270C during repairing. Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). Be careful not to apply force on the conductor when soldering or unsoldering. 3 SECTION 1 GENERAL This section is extracted from instruction manual. 4 5 6 7 8 9 10 11 12 13 14 SECTION 2 DISASSEMBLY 2-1.PANEL ASSY, LOWER 2-2.MAIN BOARD Note: When assembling it, align the slide switch position, and assemble it. CABINET BRACKET ASSY, MD CHASSIS ASSY DRUM ASSY SET PANEL ASSY, LOWER MAIN BOARD LID ASSY, CASSETE PC BOARD UNIT, SYSTEM CONTROL 1 Screw (M1.4 2.5) 2 3 Screws (M1.4 1.6) 3 Panel assy, lower ! CN502 9 CN501 ! Knob (REC VOL) ! Ring, REC (VOL) ! Main board assy 4 2 Screws (M1.4 1.6), locking 8 CN503 3 2 Screws (M1.4) 6 CN504 7 CN505 5 CN506 2 2 Screws (M1.4 3), toothed lock 1 Screw (M1.4 2.5) 15 2-3.LID ASSY, CASSETTE 2-4.PC BOARD UNIT, SYSTEM CONTROL 2 CN801 1 2 Screws (M1.4 1.6), locking 3 Lid assy, Cassette 1 Screw (M1.7 2.5) 3 PC board unit, system control 2 Screw (M1.4 1.6), locking 16 2-5.CABINET 2-6.BRACKET ASSY, MD 5 Screw (M1.4 3.0), locking 6 Spacer ! Knob (Open) ! Reinforcement (DC jack) 2 Lid, battery case assy 4 Case, battery 3 Screw (M1.4 2.5), locking 8 Screw (M1.4 1.6), locking ! Screw (M1.4 1.6) locking 7 Screw (M1.4 1.6) 1 Screw (M1.4), step 9 Cabinet 1 Screw (M1.4 1.4), special head 4 Screw (M1.4 1.4), special head 3 Screw (M1.4 1.4), special head 2 RF module 6 Spacer 5 Screw (M1.4 3.0), locking 7 Cushion, MD fitting 8 Bracket assy, MD 17 2-7.CHASSIS ASSY 2-8.DRUM ASSY 2 Screw 3 Screw 6 Screw 8Screw (M1.4 1.4), special head 8 Screw (M1.4 1.4), special head 1 Screw, step 5 Holder (Cassette) assy 7 Motor frexible board 9 Opener, lid 4 Chassis assy 7 Screw (M1.4 1.4), special head 1 Screw (M1.4 1.4) special haed 8 Screw (M1.4 2.0), locking 5 Screw (M1.4 1.4) 9 Drum assy 2 Motor, DC 4 Spring (Cleaner), tension 3 Gear (Mode B) 6 Lever (Cleaner), tension 18 3-1.ADJUSTMENTS Notes on Adjustment 1.Perform adjustments in the order given. 2.Use the following test tapes. TY-7111 (8-909-812-00) For playback level adjustment TY-7915 (8-913-932-00) For tape pass and switching pulse adjustments TY-30B (8-892-358-00) Blank tape Use the following torque meter. TW-7131 (8-909-708-71) For tension adjustment 3.Switch and knob positions As indicated in the adjustment procedures. SP/LP: SP 48kHz REC LEVEL : MIC LIMITER MIC/LINE IN : MIC MIC ATT : 0dB AVLS : NORM 4.Apply DC 4.5 V power to the DC IN jack. 5.For rotary head drum cleaning, press a piece of chamois leather (2-034-697-00) or a four-times folded clean knit fabric moistened with small amount of alcohol against the drum lightly, and rotate the drum in counter-clockwise direction. (Rotate a few times.) Test mode 1.Perform the adjustments in test mode. 2.How to enter the test mode. Press the STOP key, COUNTER key and OPEN button simultaneously when the main power is ON, to enter the test mode. Turn off the main power to exit the test mode. 3.When the machine enters the test mode, back light of the LCD turns on and the following initial display appears. At the same time, the mechanism starts loading, and display of the select test mode code segment of the LCD turns on. (It normally flashes.) Initial display of LCD Note: The respective keys can be operated during test mode. The machine can mis-operate when the keys are operated during test most. However, mis-operation of the machine can be cleared by pressing the STOP key. At the same time, tape will not be damaged by mis- operation. SECTION 3 ADJUSTMENTS 00? REMAIN? 1 40 40 19 4.Types of test mode 5.How to set the test mode code Test mode display Note: The display during the test mode can be changed by pressing the COUNTER key of the machine. However, confirm the current test mode by selecting the test mode display (REMAIN). 1).The segment value of the test mode code can be incremented or decremented by pressing the MODE key (up) or the CLOCK key (down). MODE key (up) 01 02 20 21 22 23 24 25 30 31 32 40 42 43 44 99 01. CLOCK key (down) 01 99 44 43 42 40 32 31 30 25 24 23 22 21 20 02 01. 2).The selected test mode code can be set by pressing the ENTER key. (The selected test mode code flashes before it is set.) 3).The speed mode can be incremented or decremented by pressing the VOLUME + key (up) or VOLUME - key (down). VOLUME + key (up) 1FWD 0.5FWD 1.5FWD 3FWD 25FWD 4FWD 1FWD. VOLUME key (down) 1REV 0.5REV 1.5REV 3REV 25REV 4REV 1REV. 4).The error code can be reset by pressing the COUNTER RESET key during test mode. 5).Modify the adjustment value during the SWP (switching pulse) adjustment and the record current adjustment by pressing the VOLUME + key (up) or VOLUME - key (down). Test mode codeContents 01Normal operating mode. 02Error rate measurement mode. 20 21 22Aging mode 23(This is the mode for evaluation, and is not used in service. 24 25 30 End sensor check mode. (Pulse drive under condition of FF/REW.) 31 End sensor check mode. (Pulse drive under condition of REW.) 32 T-reel lock check mode. (Under condition of FF/REW.) 40 Mechanism deck independent operation mode. 42Tape pass adjustment mode. 43Record current adjustment mode 99Error code history check mode. ?00 REMAIN 31? 43?43?0 ? Error code: When an emergency occurs during test mode, an error code is displayed in the PGM no. column. (Refer to error code table.) Adjustment target code: The adjustment target is displayed when the test mode code No. 43 is selected. (Refer to record current adjustment.) Capstan speed code: The capstan speed code is displayed. (Refer to capstan speed code table.) Adjustment value is displayed when the test mode code No. 42 or 43 isselected. (Refer to tape pass adjustment and the recode current adjustment.) The mechanism mode code is displayed when the test mode code 99 is selected. (Refer to the mechanism mode code table.) Decision test mode code: The segments turn on. (Refer to types of test mode table.) Selected test mode code: The segments flash. (Refer to types of test mode table.) 20 6). The adjustment target can be selected during the record current adjustment (No. 43) by pressing the COUNTER RESET key. The adjustment data must be saved in the EEPROM by pressing the LIGHT key. 6.Test mode code 1)Set mode: 01 Displays error code which occurs during operation. (During test display) Linear counter, A-TIME 2)Error rate measurement mode: 02 Measures error rate using a test tape or by self-recording/playback. Error counter is displayed in the following display modes during playback. Linear count mode: A-channel error A-TIME: B-channel error 3)End sensor check mode: 30, 31 The end sensor LEDs are started to drive when either one of the following modes is set. 30: Pulse drive (2.9 ms cycle) 31: Under condition of the FWD mode (2.9 ms: ON/30 ms: OFF) 32: Under condition of the FF/FWD mode (2.9 ms cycle) 4)Mechanism deck independent operation check: 40 The end sensor does not detect tape end when tape is not loaded. However the end sensor detects tape end when tape is loaded. The FWD/REV speed can be incremented or decremented by pressing the VOLUME + (up) key or the VOLUME (down) key. 5)Tape pass adjustment mode: 42 The ATF-Servo SWP (switching pulse) adjustment is performed and the adjustment data is saved in EEPROM using this mode. 6)Record current adjustment model: 43 The record current adjustments for A-channel PCM, A-channel ATF, B-channel PCM and B-channel ATF are performed in this mode. The adjustment values can be saved in EEPROM using this mode. ATF servo during playback mode Capstan speed Capstan speed codeDrum speed code display 1 1FWD2000rpm 2 0.5FWD1000rpm 3 1.5FWD2000rpm 4 3FWD2000rpm 5 25FWD2000rpm 6 4FWD2000rpm 1 1REV2000rpm 2 0.5REV1000rpm 3 1.5REV2000rpm 4 3REV2000rpm 5 25REV2000rpm 6 4REV2000rpm Adjustment target Adjustment target code display 0A-ch PCM 1A-ch ATF 2B-ch PCM 3B-ch ATF 21 7)NVRAM write error-code check: 99 The error which occurs during the normal operation mode, and t he mechanism mode when the error occurs can be checked. The error code can be reset, too. Saving the data in EEPROM and reset can be performed by pressing the LIGHT button. The two digit mechanism mode code is displayed: The first digit indicates the present mode and the second digit indicates the next mode. When the present mode and the next mode are the same, it indicates that an error occurs. When the present mode and the next mode are different, it indicates that an error occurs during transition from the present mode to the next mode. 7.Error code table *When position of rotary encoder cannot be detected, an error code is created in such a way that 0 is added in the top of the present position number, and is displayed. CodeContents 0INITIAL CODE 1 1_FWD 2 3_FWD 3 4_FWD 4 25_FWD 5REC 6UNLOAD 7EJECT 8STOP 9 1_REV A 3_REV B 4_REV C 25_REV DFF EREW FPAUSE (FWD-PAUSE) Block Control motor (Rotary encoder) Mechanism deck Drum Capstan Reel EEPROM Code 00 01* 0F* 10 11 12 13 14 15 20 21 30 31 40 41 90 91 92 Contents No error. Position cannot be detected. Loading cannot be completed. Unloading cannot be completed. Eject does not take place. T-side end sensor is defective. S-side end sensor is defective. Dew condensation. Drum motor does not rotate. Drum servo does not lock in. Capstan motor does not rotate. Capstan speed does not lock in. T-reel FG cannot be detected. S-reel FG cannot be detected. B group data saving resulted in NG. C group data saving resulted in NG. B and C group data saving resulted in NG. Present position STOP FWD EJECT CASS-IN UNLOAD FWD LOADING-L UNLOAD FF-REW STOP Error code 01 02 03 05 06 07 08 Present position STOP EJECT CASS-IN CASS-IN FF-REW FWD REV LOADING-H REV Error code 09 0A 0B 0C 0D 0E 0F 22 IC505 IC501 IC506 CN506 S301 TP524(RF) TP525(SWP) TP508(CFG) TP507(DFG) S301,2pin(JACK L) S301,8pin(JACK R) TP605 (3.5V) TP602 (REG3.5V) Mechanism adjustment parts layout diagram Mechanism Main board PCM-M1 3-2. MECHANICAL ADJUSTMENTS Tape pass adjustment Note: Be sure to perform the tape pass adjustment when rotary drum is replaced. Preparation: OscilloscopeCH-1: AC 100 mV/DIV CH-2: DC 2 V/DIV TRIG: CH-2 1.Connect an oscilloscope CH-1 to TP524 (RF) and CH-2 to TP525 (SWP). 2.Insert a test tape TY-7915 and find the center of the tape. 3.Establish the test mode. 4.Select and set the test mode code 42. 5.Decrease the SG1 guide (by rotating it clockwise), and remove a tape (Fig. 1). 6.Move down the TG1 guide (by turning it clockwise), remove a tape (Fig. 2) and turn it counter-clockwise until the right side edge of the RF waveform becomes square as shown (Fig. 3). 7.Turn the SG1 guide counter-clockwise until the left side edge of the RF waveform becomes square as shown (Fig. 4). Notice that the lower flange of the stationary guide does not contact with tape. Confirm also that tape runs along with the upper flange of the SG1 and TG1 guides. 8.Adjust the lower flange of the stationary guide. Adjust height of the stationary guide until the lower flange contacts the tape during tape run in the PLAY mode. Tape must not show any curls. 9.Perform the switching pulse adjustment. (Refer to 3-3. ELECTRICAL ADJUSTMENT) (Fig. 5) 108325sec. 10. Select and set the test mode code 02. 11. Observe the RF waveform and confirm that the waveform increases and decreases its ampli