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Sony Walkman PCM-M1 Service Manual

Digital audio tape recorder
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SERVICE MANUAL
Tape
Digital audio tape
Recording time
Standard: 120minutes
Long-play mode: 240minutes (with DT-120)
Sampling frequency
48kHz, 44.1kHz, 32kHz
Quantization
Standard: 16-bit linear
Long-play mode: 12-bit non linear
Frequency response
Standard: Fs 48kHz 20-22,000Hz (±1.0dB) (LINE IN)
Long-play mode: Fs32kHz 20-14,500Hz (±1.0dB) (LINE
IN)
Signal to noise ratio
Standard: more than 87dB
Long-play mode: more than 87dB
(1kHz IHF-A, LINE IN)
Dynamic range
Standard: more than 87dB
(1kHz IHF-A, LINE IN)
Total harmonic distortion Standard: less than 0.008% (1kHz, 22kHz LPF, LINE IN)
Long-play mode: less than 0.09% (1kHz, 22kHz LPF,
LINE IN)
Wow and flutter
Below measurable limit (less than ±0.001% W.PEAK)
Input
Jack type
Impedance
stereo minijack
MIC 4.7k
MIC/
LINE IN
LINE IN 47k
Output
Jack type
Impedance
Rated output
LINE OUT
stereo
220
minijack
REMOTE /2
16
Input/Output
DIGITAL • REMOTE I/O jack (special jack)
MICROFILM

SPECIFICATIONS

Fs 44.1kHz 20-20,000Hz (±1.0dB) (LINE IN)
Fs 32kHz 20-14,500Hz (±1.0dB) (LINE IN)
Rated input level
Minimum input level
MIC 1.4mV
MIC 0.3mV
LINE IN 500mV
LINE IN 120mV
Minimum output level
Load impedance
500mV
10k
87mV
15mW+15mW
16
PCM-M1
w
Model Name Using Similar Mechanism
Tape Transport Mechanism Type
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 life
See "Replacing the batteries" (page 11).
Power consumption
0.9W
Approx. 80 117.3 29.2mm (3 1 / 4
Dimension
(w/h/d) not incl. projecting parts and controls
Mass
Main 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
• 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.
DIGITAL AUDIO TAPE RECORDER
AEP Model
US Model
t
TCD-D100
MT-D100-128
4 5 / 8
1 3 / 16 in)
2
stereo miniplug) (1)*

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  Summary of Contents for Sony Walkman PCM-M1

  • Page 1: Specifications

    (Supplied) Fs 44.1kHz 20-20,000Hz (±1.0dB) (LINE IN) DC IN 4.5V jack accepts: Fs 32kHz 20-14,500Hz (±1.0dB) (LINE IN) the Sony AC power adaptor AC-E45HG Long-play mode: Fs32kHz 20-14,500Hz (±1.0dB) (LINE (Supplied) the car battery cord DCC-E245 (not supplied) Signal to noise ratio Standard: more than 87dB for use with 12V/24V car battery.
  • Page 2: Table Of Contents

    TABLE OF CONTENTS GENERAL ································································ 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. CABINET ········································································· 16 2-6. BRACKET ASSY, MD ···················································· 16 2-7.
  • Page 3: General

    SECTION 1 This section is extracted from instruction manual. GENERAL — 3 —...
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  • Page 14: Disassembly

    SECTION 2 DISASSEMBLY PANEL ASSY, LOWER MAIN BOARD LID ASSY, CASSETE PC BOARD UNIT, SYSTEM CONTROL CABINET BRACKET ASSY, MD CHASSIS ASSY DRUM ASSY 2-1. PANEL ASSY, LOWER Note: When assembling it, align the slide switch position, and assemble it. 2 3 Screws (M1.4 1.6) 1 Screw (M1.4...
  • Page 15: Lid Assy, Cassette

    2-3. LID ASSY, CASSETTE 2 CN801 1 2 Screws (M1.4 1.6), locking 3 Lid assy, Cassette 2-4. PC BOARD UNIT, SYSTEM CONTROL 1 Screw (M1.7 2.5) 3 PC board unit, system control 2 Screw (M1.4 1.6), locking — 15 —...
  • Page 16: Cabinet

    2-5. CABINET 6 Spacer 5 Screw (M1.4 3.0), locking 7 Screw (M1.4 1.6) 9 Cabinet !™ Knob (Open) !¡ Reinforcement (DC jack) 2 Lid, battery case assy !º Screw (M1.4 1.6) locking 4 Case, battery 3 Screw (M1.4 1 Screw (M1.4), 2.5), locking step...
  • Page 17: Chassis Assy

    2-7. CHASSIS ASSY 4 Chassis assy 2 Screw 7 Motor frexible board 6 Screw 8 Screw (M1.4 1.4), 8 Screw (M1.4 1.4), special head special head 9 Opener, lid 1 Screw, step 3 Screw 5 Holder (Cassette) assy 2-8. DRUM ASSY 8 Screw (M1.4 2.0), 7 Screw (M1.4...
  • Page 18: Adjustments

    SECTION 3 ADJUSTMENTS 3-1. ADJUSTMENTS Notes on Adjustment Perform adjustments in the order given. 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 Switch and knob positions As indicated in the adjustment procedures.
  • Page 19 Types of test mode Test mode code Contents Normal operating mode. Error rate measurement mode. Aging mode (This is the mode for evaluation, and is not used in service. End sensor check mode. (Pulse drive under condition of FF/REW.) End sensor check mode. (Pulse drive under condition of REW.) T-reel lock check mode.
  • Page 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. Test mode code < Operation check mode > Set mode: 01 Displays error code which occurs during operation.
  • Page 21 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.
  • Page 22 Mechanism adjustment parts layout diagram – Mechanism – – Main board – — 22 —...
  • Page 23: Mechanical Adjustments

    3-2. MECHANICAL ADJUSTMENTS Tape pass adjustment Note: Be sure to perform the tape pass adjustment when rotary drum is replaced. Preparation: Oscilloscope CH-1: AC 100 mV/DIV CH-2: DC 2 V/DIV TRIG: CH-2 Connect an oscilloscope CH-1 to TP524 (RF) and CH-2 to TP525 (SWP). Insert a test tape TY-7915 and find the center of the tape.
  • Page 24: Electrical Adjustments

    14. Move down the TG1 guide (by turning it clockwise), and • Confirmation of speed confirm that the RF waveform loses parallel shape, then return [Capstan FG] the SG1 guide to original position. When the original Connect a frequency counter to TP508 (CFG). waveshape cannot be restored (Fig.
  • Page 25 Connect CH-1 of an oscilloscope to TP524 (RF) and CH-2 to TP525 (SWP). Establish a test mode. Select and set the test mode code 40 and speed code 1 using the VOLUME (up) key. ( 1 FWD) Insert a test tape TY-7915. Select and set the test mode code 42.
  • Page 26: Diagram

    PCM-M1 SECTION 4 DIAGRAM 4-1. BLOCK DIAGRAM — MD SECTION — – 26 – – 27 – – 28 –...
  • Page 27: Block Diagram - Audio Section

    4-2. BLOCK DIAGRAM — AUDIO SECTION — AUDIO BLOCK Q324 Q301 RIPPLE PLUG IN POWER +3.5V DC BUS FILTER S301 S301 MIC/LINE MIC/LINE Q325,326 REC VOL Q328 IC303 IC304 IC301 BOARD LINE RIPPLE IC310 AD/DA +3.5V FILTER J301 MIC AMP INPUT CONVERTER Q307,308...
  • Page 28: Ic Block Diagram

    4-3. IC BLOCK DIAGRAM IC304 AK4520-VF-E2 IC507 CXK5V8257BTM-70LL VA AGND VD DGND DECODER AINL+ 15 MCLK Decimation Clock Divider Modulator AINL Filter CMODE BUFFER AINR+ Delimation LRCK Modulator AINR Filter SCLK MEMORY MATRIX VREFH SDTO 512 x 512 Serial I/O VREFL Interface SDTI...
  • Page 29 IC508 AK6420HM-E2 DATA REGISTER R/W AMPS INSTRUCTION INSTRUCTION EEPROM REGISTER DECODE. AUTO 2048BIT CONTROL ERASE (128x16) CLOCK GENERATION ADD. DECODER BUFFERS VPP SW GENERATOR RESET V REF 5 GND RDY/BUSY IC518 MB88347PFV IC310 TK15325MT-L 12BIT SHIFT REGISTER 1ch OUT D6 D7 D9 D10 D11 D2 D3 ADDRESS...
  • Page 30 IC502 CXA8022N ROTOR POSITION DETECT EXOR SOFT OUTPUT TIMING SWITCHING DRIVE CONTROL DRIVE BUFFER START CONTROL OVER HEAT PROTECT IC511 TLC29321 LOGIC LOGIC SELECT FIN-A FIN-B 1/2 DIVIDER R VIAS INHIBIT INHIBIT IC504 LB1882V W OUT V OUT U OUT VCC 2 VCC 1 U IN 1...
  • Page 31: Ic Pin Function

    4-7. IC PIN FUNCTION • IC506 CXD2607BR Pin No. Pin Name Description External RAM address input. — External RAM address input. External RAM address input. External RAM address input. External RAM address input. External RAM write enable signal output. External RAM output enable signal output. XEAN External addressing enable signal output.
  • Page 32 Pin No. Pin Name Description — +5 v. Digital interface signal output. SELA Oscillating frequency selection signal input. EXSY External sync signal input/output. Normally connected to EXSN. EXSN External sync signal input/output. Normally connected to EXSY. F128 128 fs signal/256 fs signal during double speed input/output. F256 256 fs signal/512 fs signal during double speed input/output.
  • Page 33 • IC505 CXP87540-046R Pin No. Pin Name Description TURBO Capstan turbo (Power on = for Capstan high speed rotation). CAPDIR Capstan direction: reverse. CMR– — Control motor -. CMR+ Control motor +. CMRSTBY Control motor standby. HPVCNT Headphone power on. XADSTBY A/D converter STANDBY.
  • Page 34 Pin No. Pin Name Description System controller communication data input. System controller communication data output. XSCK0 System controller communication data clock. AVSS — Built-in A/D converter, reference GND. AVREF — Built-in A/D converter, reference power supply. AVDD — Built-in A/D converter power supply. (connected to VDD). RFENV RF envelope input.
  • Page 35: Exploded Views

    SECTION 5 EXPLODED VIEWS Note: • -XX, -X mean standardized parts, so they may • The mechanical parts with no reference number have some differences from the original one. in the exploded views are not supplied. • Items marked “*” are not stocked since they •...
  • Page 36: Cassette Holder Section

    5-2. CASSETTE HOLDER SECTION Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks X-4948-445-3 BRACKET ASSY, MD 3-387-566-01 SCREW, STEP 3-362-469-01 CUSHION, MD FITTING X-3373-745-1 HOLDER (CASSETTE) ASSY 4-990-722-01 SPACER X-4948-667-1 CHASSIS ASSY 3-704-197-31 SCREW (M1.4X3.0), LOCKING * 63 3-013-472-01 OPENER, LID 3-331-047-01 SCREW (M1.4X1.4),SPECIAL HEAD...
  • Page 37: Machanism Section 1

    5-3. MACHANISM SECTION 1 (MT-D100-128) Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks 3-321-393-01 WASHER, STOPPER 3-013-448-01 FLANGE 3-013-454-01 LEVER (LOADING U) 3-013-447-01 ROLLER (GUIDE) 3-013-477-01 SPRING (SF) 3-013-469-01 COLLAR (GUIDE) 3-360-817-01 SHAFT (CASSETTE) 3-013-488-01 SPRING (ROTARY ROLLER), COIL 3-315-414-00 WASHER X-3373-739-1 LEVER (CLEANER) ASSY 3-013-465-01 ROLLER (F), GUIDE...
  • Page 38: Machanism Section 2

    5-4. MACHANISM SECTION 2 (MT-D100-128) Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks 3-013-452-01 GEAR, CAM * 167 3-013-466-01 LEVER (BRAKE S) 3-315-384-11 WASHER, STOPPER 4-992-343-01 SPRING (BRAKE CTR) X-3373-716-1 LEVER (FF/REW) ASSY * 169 3-013-468-01 LEVER (F-BT) 3-013-456-01 GEAR (C) 3-013-481-01 SPRING (GEAR PRESS) 1-475-193-11 PC BOARD UNIT, SENSOR...
  • Page 39: Electrical Parts List

    SECTION 6 MAIN ELECTRICAL PARTS LIST Note: • Items marked “*” are not stocked since they • COILS When indicating parts by reference number, are seldom required for routine service. Some uH: µH please include the board name. delay should be anticipated when ordering these •...
  • Page 40 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks C530 1-162-964-11 CERAMIC CHIP 0.001uF C329 1-135-210-11 TANTALUM CHIP 4.7uF C330 1-162-970-11 CERAMIC CHIP 0.01uF C531 1-162-960-11 CERAMIC CHIP 220PF C331 1-135-210-11 TANTALUM CHIP 4.7uF C532 1-162-964-11 CERAMIC CHIP 0.001uF C332 1-104-852-11 TANTAL.
  • Page 41 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks C601 1-162-912-11 CERAMIC CHIP 0.5PF D506 8-719-026-26 DIODE MA786WK C602 1-162-912-11 CERAMIC CHIP 0.5PF D508 8-719-036-80 DIODE RD3.9SB-T1 C603 1-162-912-11 CERAMIC CHIP 0.5PF D509 8-719-820-41 DIODE 1SS302 C604 1-162-912-11 CERAMIC CHIP 0.5PF...
  • Page 42 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks L509 1-412-002-31 INDUCTOR CHIP 4.7uH < RESISTOR > L510 1-414-402-11 INDUCTOR 47uH L511 1-410-997-31 INDUCTOR CHIP 2.2uH R101 1-216-830-11 METAL CHIP 5.6K 1/16W L512 1-412-002-31 INDUCTOR CHIP 4.7uH R102 1-216-837-11 METAL CHIP 1/16W...
  • Page 43 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks R335 1-216-833-11 METAL CHIP 1/16W R220 1-216-828-11 METAL CHIP 3.9K 1/16W R221 1-216-833-11 METAL CHIP 1/16W R336 1-216-833-11 METAL CHIP 1/16W R222 1-216-837-11 METAL CHIP 1/16W R337 1-216-845-11 METAL CHIP 100K 1/16W...
  • Page 44 MAIN REC VOL Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks R522 1-216-825-11 METAL CHIP 2.2K 1/16W R595 1-216-809-11 METAL CHIP 1/16W R523 1-216-833-11 METAL CHIP 1/16W R596 1-216-845-11 METAL CHIP 100K 1/16W R525 1-216-821-11 METAL CHIP 1/16W R597 1-216-845-11 METAL CHIP...
  • Page 45 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks MISCELLANEOUS ACCESSORIES & PACKING MATERIALS *************** ******************************** 1-475-171-21 PC BOARD UNIT, SYSTEM CONTROL 1-665-830-11 PC BOARD, MOTOR FLEXIBLE 1-475-194-11 ADAPTOR, BATTERY CHARGE 8-719-031-97 DIODE NJL5134KL 1-475-196-11 REMOTE CONTROL UNIT (US) 1-801-766-11 RF MODULE 1-475-196-21 REMOTE CONTROL UNIT (AEP) 1-475-190-12 INVERTER UNIT...
  • Page 46 PCM-M1 Sony Corporation 97K1656-1 Printed in Japan © 1997.11 9-923-287-11 Personal A&V Products Company Published by Quality Engineering Dept. (Shibaura) — 60 —...