Mechanical Adjustments; Electrical Adjustments; Diagrams; Ic Pin Description - Sony Walkman WM-EX9 Service Manual

SECTION 4

MECHANICAL ADJUSTMENTS

PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab :
playback head pinch roller
capstan rubber belt
2. Demagnetize the playback head with a head demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power
supply voltage (1.3 V) unless otherwise noted.
Torque Measurement
Mode Torque Meter Meter Reading
15 – 25 g • cm
FWD
(0.21 – 0.35 oz • inch)
CQ-102C
FWD less than 2 g • cm
back tension (less than 0.03 oz • inch)
15 – 25 g • cm
REV
(0.21 – 0.35 oz • inch)
CQ-102RC
REV less than 2 g • cm
back tension (less than 0.03 oz • inch)
more than 50 g • cm
FF, REW CQ-201B
(more than 0.69 oz • inch)
SECTION 5

ELECTRICAL ADJUSTMENTS

PRECAUTION
• Supplied voltage : 1.3 V
• Switches and control position
VOL switch : NORM
• Remote control position
HOLD switch : OFF
VOL control : MAX
SOUND mode : NORM
DOLBY mode : OFF
Test Tape
Type Signal Used for
WS-48A 3 kHz, 0 dB tape speed adjustment
Tape Speed Adjustment
Procedure :
test tape
digital
WS-48A
frequency counter
(3 kHz, 0 dB)
32 Ω
set
2
jack
1. Playback WS-48A (tape center part) in the REV state and
adjust RV601 so that the digital frequency counter reading
becomes3,000 Hz.
Specification Value :
Digital frequency counter
2,985 to 3,015 Hz
2. Playback WS-48A (tape center part) in the FWD state.
Check that digital frequency counter reading is within 2.5% of
reading of step 1.
Adjustment Location :
RV601
– 9 –

6-1. IC PIN DESCRIPTION

• IC701 ML63514-017 (SYSTEM CONTROL)
Pin No. Pin Name I/O
1 A/B SW I Side A/B detection switch signal input. L: side A, H: side B
2 FWD SW I MD mode switch (FWD) signal input. L: ON
3 CEN SW I MD mode switch (CENTER) signal input. L: ON
4 RVS SW I MD mode switch (RVS) signal input. L: ON
5 CASSETTE SW I Cassette with/without detection switch signal input. L: with, H: without
6 DATA/RMUM I/O Communication data signal output, Remote control with/without detection signal input.
7 REVIVE CTL O Tone select switch signal output. H: REVIVE, L: MEGA BASS/GROOVE
8 MEGA BASS CTL O Tone select switch signal output. H: MEGA BASS, L: OFF/GROOVE
9 F/R CTL O Head select signal output. L: FWD, H: RVS
10 BOOST CTL O Tone select switch signal output. H: BOOST ON, L: OFF
11 AMP CTL O Audio circuit • DDC control signal output. H: POWER ON
12 MUTE CTL O Audio muting control signal output. L: MUTE ON
13 SET STOP1 I Set stop voltage signal input
14 SET STOP2 I Set stop reference voltage signal input
15 BATT DET I Power voltage detection signal input
16 KEY IN I Operation switch signal input
17 PM CTL O Plunger control signal output. L: ON
18 PHOTO (T) CTL O Rotational detection intermittent signal output. (Take-up side) L: ON
19 PHOTO (S) CTL O Rotational detection intermittent signal output. (Supply side) L: ON
20 DOLBY CTL O Dolby circuit control signal output. L: ON
21 VDD1 — Power supply pin. (for external interface)
22 VSS — Ground
23 VDD — Power supply pin
24 VDDH — Backup increased voltage power supply pin
25 CB1 — Increased power supply capacitor connection pin
26 CB2 — Increased power supply capacitor connection pin
27 VDDL — Internal logic positive side power supply pin
28 XT0 I Crystal oscillator connection pin. (32.768 kHz)
29 XT1 O Crystal oscillator connection pin. (32.768 kHz)
30 TEST1B I Test input pin. (Connect to power supply pin.)
31 TEST2B I Test input pin. (Connect to power supply pin.)
32 OSCM — Not used. (Open)
33 OSC0 I High speed CR oscillation (800 kHz) resistor connection pin
34 OSC1 O High speed CR oscillation (800 kHz) resistor connection pin
35 RESET I Reset signal input
36 BEEP O Beep signal output
37 PHOTO (S) IN I Rotational detection signal input
38 PHOTO (T) IN I Rotational detection signal input
39 AMS IN I Music with/without detection (AMS) signal input. (External interruption) H: without
40 P SIG I Motor P-SIG signal input. (External interruption)
41 MOTOR START O Motor wake-up signal output. L: wake-up
42 MOTOR DIR O Motor rotational direction control signal output. H: CCW, L: CW
43 CLRL 2 O Mode select signal output to Motor servo IC (IC601).
44 CLRL 1 O Mode select signal output to Motor servo IC (IC601).
45 MOTOR W O Motor control signal output
46 MOTOR V O Motor control signal output
47 MOTOR U O Motor control signal output
48 1/2 O Motor speed 1/2 control signal output. L: 1/2 high speed, H: normally
SECTION 6

DIAGRAMS

Pin Description
– 10 –