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M-98V
SERVICE MANUAL US Model
Ver 1.0 1999. 03 Canadian Model
AEP Model
E Model
Tourist Model




Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type MZ-98-100




SPECIFICATIONS

Tape alkaline batteries.
y (normal position type) Dimensions (w/h/d) (incl. projecting parts and controls)
Recording system Approx. 60.5 93.9 26.0 mm (2 1/2 3 3/4 1 11/16 in.)
2-track 1 channel monaural Mass
Frequency range Approx. 130 g (4.6 oz.)
400 - 3,000 Hz (2.4 cm/s) Supplied accessories
Speaker Remote control microphone ECM-J805 (1)
Approx. 2.8 cm (1 1/8 in.) dia. Microcassette tape MC-30 (1)
Power output Earphone MDR-E123 (1)
250 mW Carrying case (1)
Input Hand strap (1)
Microphone input jack (minijack/plug in power) sensitivity Batteries R03 (SB) (2) (Tourist model only)
0.37 mV for 3 kilohms or lower impedance microphone
Output Design and specifications are subject to change without notice.
Earphone jack (minijack) for 8 - 300 ohms earphone
Power requirements
3 V DC batteries R03 (size AAA) 2/External DC 3 V power
sources
Battery life (Approximate hours) (EIAJ*)
Battery Recording
Sony alkaline LR03 (SG) 9.5
Sony R03 (SB) 3.5
* Measured value by the standard of EIAJ (Electronic Industries
Association of Japan). (Using a Sony Microcassette tape)

For maximum performance, we recommend that you use




MICROCASSETTETM-CORDER

MICROFILM


1
TABLE OF CONTENTS

1. SERVICE NOTE .......................................................... 3

2. GENERAL .................................................................... 4

3. DISASSEMBLY
3-1. Panel (Rear) Assy ................................................................ 5
3-2. Panel (Lid) Assy .................................................................. 5
3-3. MD Block Assy ................................................................... 6
3-4. Main board, complete ......................................................... 6
3-5. Frame .................................................................................. 7
3-6. Mode Motor Block .............................................................. 7

4. MECHANICAL ADJUSTMENTS .............................. 8

5. ELECTRICAL ADJUSTMENTS ............................... 8

6. DIAGRAMS
6-1. IC Pin Description ............................................................. 10
6-2. Block Diagram .................................................................. 12
6-3. Printed Wiring Board ........................................................ 14
6-4. Schematic Diagram ........................................................... 17

7. EXPLODED VIEWS
7-1. Panel (Lid) Section ............................................................ 22
7-2. Main Board Section .......................................................... 23
7-3. Mechanism Section (1) ..................................................... 24
7-4. Mechanism Section (2) ..................................................... 25

8. ELECTRICAL PARTS LIST .................................... 26




Notes on Chip Component Replacement
Never reuse a disconnected chip component.
Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.


2
SECTION 1
SERVICE NOTE
This set uses the photo reflector PH701 to detect the rotation of the gear. PH701 is on the main board and so removal of the main board does
not allow the set to detect the rotation of the gear. This makes motor control impossible which prevents normal operation.
When repairing the set as energized with the main board removed, proceed as follows:

Service the Main Board
1. Short the BP701 (SERVICE) on the main board. (see the Fig. 1.)
2. Refer to the "SECTION3 DISASSEMBLY" (page 5) and open the main board.
3. Put a tape in the set.
4. Fixed at S703 (TAPE DET) on mode or connect the jumper wire between TP38 and GND (TP66).
5. Supply 3 V DC to the battery terminals.
6. Rotate the S701 (MODE SELECT) one turn by hand (mode sensor).
7. Press the desired operating switch (9 (, FF, etc.).
8. Check the mode on the liquid crystal panel. Use item 6 repeatedly to switch modes.
9. When finished with the job, disconnect the power and open (remove the short) the BP701 (SERVICE).




MAIN BOARD (SIDE B)



TP38



S703
S701 (TAPE DET) TP66
(MODE SELECT)




BP701 SHORT
(SERVICE)




` terminal ' terminal


Fig. 1.




3
SECTION 2
GENERAL This section is extracted
from instruction manual.




4
SECTION 3
DISASSEMBLY
Note : This set can be disassemble according to the following sequence.
Set Panel (rear) Panel (lid) MD block Main board, Frame Mode motor
assy assy assy complete block


Note : Follow the disassembly procedure in the numerical order given.


3-1. PANEL (REAR) ASSY

When installing, position the knobs (VOR, MIC SENS) and the switches.

1 screws (B1.7x18) (G), tapping

knob (MIC SENS)
knob (V O R)

2 screw (B1.7x18) (G), tapping




3 screw (M1.4x5.0), locking
4 panel (rear) assy




switches




3-2. PANEL (LID) ASSY



1 knob (EJECT)




2 CN102




a


5 lever (C holder) assy
b




3 screws (M1.4),
toothed lock



6 panel (lid) assy

4 screw




5
3-3. MD BLOCK ASSY

When installing the MD block assy, position the knobs with the switches.
When installing the microphone cabinet assy, align the knobs with the spring and switches.



1 screw (B1.7x4), tapping

switches
spring

switch
2 MD block assy
knobs
(REC PAUSE/REC)
switches
4 screws (1.7x3), tapping



5 bracket (speaker)
knob
6 speaker (2.8cm) (HOLD EJECT)
knob
(FF/CUEREW/REVIEW)
3 cabinet assy, microphone




knob (TAPE SPEED)
knob (FAST PB)




3-4. MAIN BOARD, COMPLETE

When installing, position the cam gear with the switch.




8 MAIN board, complete

7 screw (B1.7x4), tapping
3 unsolders

6 screw, precision +P 1.4x1.6

5 screw, precision +P 1.4x1.6

1 unsolders




gear, cam
4 CN101
a switch


b 2 unsolders




6
3-5. FRAME

Be careful not to damage the flexible board.
Remove from a to b to c.
4 screw
b


7 frame
c


a


3 screw

6 flexible board (head, magnetic)
a
c


5 absorbent, acoustic, reflection




b




1 screw (1.7x4), tapping (B)


2 cover (HD)
3-6. MODE MOTOR BLOCK




1 screws (M1.4)




3 microphone, electret condenser



2 mode motor block




7
SECTION 4 SECTION 5
MECHANICAL ADJUSTMENTS ELECTRICAL ADJUSTMENTS
PRECAUTION Standard Input Level
1. Before adjusting, clean the following parts with a piece of Input terminal MIC (PLUG IN POWER) jack
cotton moistened with alcohol.
Source impedance 300
record/playback/erase head pinch roller
rubber belt capstan Input level 0.77 mV (60 dB)
2. Demagnetize the record/playback/erase head using a head Frequency 1 kHz
demagnetizer. (Do not bring the head demagnetizer close to the
erase head.)
Standard Output Level
3. Do not use a magnetized screwdriver for adjustments.
4. After adjusting, apply screw-locking compound to the adjusted Output terminal EAR jack
parts. Load impedance 10 k
5. Unless specified otherwise, use a specified voltage (2.5 V DC) Output level 78 mV (20 dB)
to perform the adjustments.
Test Tape
Torque Measurement
TAPE SPEED switch : 2.4cm/s Type Signal User for
Mode Torque Meter Meter Reading S-2-A030 3 kHz, 20 dB Azimuth Adjustment
5 10 g cm WS-24 3 kHz, 10 dB Tape Speed Adjustment
FWD, REV CQ-103M
(0.07 0.13 oz inch)
more than 15 g cm 0 dB = 0.775 V
FF, REW CQ-201M
(more than 0.209 oz inch)
PRECAUTION
Switch and control position
Tape Tension Measurement
VOL control : 5 (Mechanical center)
TAPE SPEED switch : 2.4cm/s
TAPE SPEED switch : 2.4cm/s
Mode Torque Meter Meter Reading VOR switch : OFF
more than 15 g FAST PB switch : OFF
FWD CQ-403M MIC SENS switch : H
(more than 0.53 oz)

Record/Playback/Erase Head Azimuth Adjustment
Procedure :
FWD/REV playback

test tape
S-2-A030 level meter
(3 kHz, 20 dB)
10 k

set


EAR jack (J102)

Rotate the screw to adjust level meter reading to the maximum.
Note : Adjust to the maximum peak though there may be two or
three peaks.

Adjustment Location :




REV side FWD side
adjustment screws




8
Tape Speed Adjustment
Procedure :
After adjusting the 2.4cm/s speed, adjust the 1.2cm/s speed.
FWD/REV playback

digital frequency
test tape counter
WS-24
(3 kHz, 10 dB) 0000
10 k

set


EAR jack (J102)

1. Tape Speed : 2.4cm/s/FWD
Playback WS-24 (tape center part) and adjust RV601 so that
reading on the digital frequency counter becomes 3,000 Hz.
2. Tape Speed : 1.2cm/s/FWD
Playback WS-24 (tape center part) and adjust RV601 so that
reading on the digital frequency counter becomes 1,500 Hz.

Specification Value :
Adjustment part Tape speed Frequency counter
RV601 2.4cm/s 2,985 3,045 Hz
RV602 1.2cm/s 1,470 1,530 Hz

3. Tape Speed : 2.4cm/s/REV
Playback WS-24 (tape center part) in the REV state.
Check that digital frequency counter reading is within 2% of
reading of step 1.
4. Tape Speed : 1.2cm/s/REV
Playback WS-24 (tape center part) in the REV state.
Check that digital frequency counter reading is within 2% of
reading of step 2.
2.4cm/s : 60 Hz
1.2cm/s : 30 Hz

Adjustment Location : main board


MAIN BOARD (SIDE B)

IC601


RV602 1.2cm/s




RV601 2.4cm/s




9
SECTION 6
DIAGRAMS
6-1. IC PIN DESCRIPTION
IC701 MB89133LPFV-G-488BND (SYSTEM CONTROL)
Pin No. Pin Name I/O Pin Description
1 AVCC -- Power supply pin. (+3 V)
2 RST I/O Reset signal input/output. Reset signal input: "L", Software reset signal output: "L"
3 MOD 0 -- Not used. (Connect to ground.)
4 MOD 1 -- Not used. (Connect to ground.)
5 X0 I Clock oscillator crystal connect pin (4 MHz). Main clock crystal oscillator signal input.
6 NC -- Not used. (Open)
7 NC -- Not used. (Open)
8 X1 O Clock oscillator crystal connect pin (4 MHz). Main clock crystal oscillator signal output.
9 VCC -- Power supply pin. (+3 V)
10 XDA -- Not used. (Connect to ground.) (Sub clock oscillation output.)
11 NC -- Not used. (Open)
12 NC -- Not used. (Open)
13 XIA -- Not used. (Open) (Sub clock oscillation signal output.)
14 SUBM BRK O Set-up motor brake control signal output. "H": Brake on
15 M CTL 2 O Servo start frequency control signal output. "H": Frequency down
16 REC CTL 2 O Bias and LED power control signal output. "H": Bias and LED on
17 NC -- Not used. (Open)
18 REC CTL 1 O Record mode select and microphone power control signal output.
"L": REC and microphone on
19 MUTE CTL O IC101 (CX1347N) audio mute signal output. "H": Mute on
20 C/R CTL O CUE/REVIEW mute control signal output. "H": Mute on
21 NC -- Not used. (Open)
22 PB CTL O REC/PB switch signal output. "H": Playback mode
23 FPB CTL O FAST PB servo control signal output. "H": FAST PB on
24 VOR COND1 I VOR IC (IC102: NJM2072M) detect signal output. "L":VOR on (Motor stop)
25 VSS -- Ground
26 PRE AMP O IC101 (CX1347N) power control signal output. "H": Power on
27 M SPD O Motor speed control signal output (CUE increase speed). "H": Increase speed
28 NC -- Not used. (Open)
29 SUBM CTL O Set-up motor control signal output. "H": Motor on
30 M BRK O BSL motor brake control signal output. "H": Brake on
31 M DIR O BSL motor rotate direction control signal output. "H": CCW, "L": CW
32 NC -- Not used. (Open)
33 M CTL 1 O BSL motor ON/OFF control signal output. "H": Motor on
34 EN V O System peripheral power control signal output. "L": Power on
35 VOR COND2 I VOR IC (IC102: NJM2072M) power detect signal input. "L": Power on
36 REV NAIL I REV claw detect signal input. "L": With REV claw
37 FWD NAIL I FWD claw detect signal input. "L": With FWD claw
38 NC -- Not used. (Open)
39 NC -- Not used. (Open)
40 SERVICE I Service mode detect signal input. "L": Service mode
41 MD 3 I MD 3 position detect signal input. "L": MD 3
42 MD 2 I MD 2 position detect signal input. "L": MD 2
43 MD 1 I MD 1 position detect signal input. "L": MD 1
44 NC -- Not used. (Open)
45 NC -- Not used. (Open)
46 MD 0 I MD 0 position detect signal input. "L": MD 0
47 FPB COND I FAST PB mode detect signal input. "L": FAST PB mode
48 RIF COND I Reflector signal detect signal input. "L": Edge input
49 NC -- Not used. (Open)
50 WAKE UP I Microcomputer start-up signal input by key input (H edge input).


10
M-98V


Pin No. Pin Name I/O Pin Description 6-2. BLOCK DIAGRAM
51 TAPE COND I Tape detect signal input. "H": With tape and microcomputer start-up at H edge input.
52 HOLD COND I Hold detect signal input. "L": Hold on OFF
S103
53 CS O LCD driver chip select signal output. "H": Data transfer J101 ON VOR
MIC REC IN
3
54 SDATA O LCD driver serial data signal output. (PLUG IN POWER) POWER SW B+
MIC SW VCC 17
(3V)
+
Q123, 124
55 SCLK O LCD driver serial clock signal output. Q125 MIC
POWER FILTER B+
56 NC -- Not used. (Open) SW Q106 (3V)
MIC SW Q105
57 AVSS -- A/D converter ground pin. Q103(1/2)

58 NC -- Not used. (Open) MIC
59 AVR -- A/D converter reference voltage. MIC901 AMP
MIC Q101 MIC SW MIC SW
POWER
60 RM COND I Remote control microphone plug, pause detect signal input. (Analog voltage) Q102 Q104 REF 5 REF OUT OUT A
PB SW REF
9
61 KEY IN I Key input data signal. (Analog voltage) Q107-109 J102
EAR
62 KEY IN 2 I Key input data signal. (Analog voltage) MIC SW MIC REC NF
Q103(2/2) SENS 24
63 BATT IN I Power voltage level signal input. (Analog voltage) HRPE901 Q116 POWER
SP901
REC/PB/ERASE OUT B
64 NC -- Not used. (Open) S101-1 TAPE SPEED S102 7 (SPEAKER)
HEAD BIAS OSC H
1.2cm 2.4cm PRE, POWER AMP
Q111 MIC
IC101
SENS L
FWD

REC/PB HEAD BIAS SW
Q112
REV
REC OUT
20
PB IN VOR
23
IC102
LINE
+ VCC 8
OUT
ERASE CURRENT 21 1 IN OUT1 7
FWD Q113(1/2) PB NF OUT2 6
REC SW 22
Q115
ERASE HEAD REC/PB RV101 VOR POWER
16 SYSCON VOR LEVEL SW SW
ERASE CURRENT PB SW VOL Q121 Q122
REV Q113(2/2) Q118 POWER IN
REC SW 14
Q117
B+(3V)
19 REG OUT

LED POWER MUTE MUTE SW MUTE SW
10 LED 12
LED SW MUTE Q127, 128 Q119, 120
D901
Q114 REF
REC
B+ SOFT
(3V) SWITCHING
S702
DRIVE
FAST PB
OFF 47 FPB COND MUTE CTL 19
REC U IN
BP701 (SERVICE) PRE AMP 26 BACK 10
SW V IN
ON 40 SERVICE C/R CTL 20 ELECTROMOTIVE 9
Q126 POWER DET W IN M901
VOR COND1 24 25
MOTOR
16 REC CTL2 C/R COND2 35
U U
18 REC CTL1 SOFT OUTPUT 13
START SWITCH START START TUNING V V
22 PB CTL M CTL1 33 1 SWITCHING DRIVER 15
Q601(1/2),614(2/2) CONTROL CONTROL W W
46 MD0 DRIVE BUFFER 17
41 MD3 COM
S701
START CONTROL C ST STARTING (3V)
(MODE SELECT) 42 MD2 M CTL2 15 26
SYSTEM Q615 OSC
MD1 43 MD1
CONTROL
IC701 REV
MD2 DIRECTION SWITCH MOTOR SERVO
M DIR 31 27 FWD/REV
S703 TAPE DET Q601(2/2),614(2/2) IC601 MOTOR
TAPE 51 TAPE DET
MD3 ( DET
) Q702,703 BRAKE
Q605-607
S707 SPEED CONTROL
MD0 36 REV NAIL
(REV) FTB CTL 23 (FAST PB)
Q602,603
S708 37 FWD NAIL RV601 SAW SERVO REF.V TERMINAL
(FWD) 30
2.4cm/s AMP GENERATOR PROTECT
TAPE RV601 S101-2
2.4cm
SPEED TAPE
60 RM COMB RV602 BRAKE
RV602 1.2cm SPEED ON/OFF