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SONY WMSP1
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of SONY WMSP1 Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English

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Text excerpt from page 5 (click to view)
SECTION 3 ADJUSTMENTS
4-1. BLOCK DIAGRAM

SECTION 4 DIAGRAMS
TUNER SECTION
AM Section BAND : AM
AM RF signal generator Put the lead-wire antenna close to the set.

WM-SP1

2-5. SWITCH BOARD REMOVAL

1 Screws (1.7x3) tapping

3-1. MECHANICAL ADJUSTMENTS
PRECAUTION

3-2. ELECTRICAL ADJUSTMENTS
PRECAUTION

• Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjustments should be finally done by the trimmer capacitors. < > : Saudi Arabia model [ ] : East European model
AM IF ALIGNMENT Adjust for a maximum reading on level meter. T1 455kHz

1. Clean the following parts with a denatured-alcohol-moistened swab : playback head pinch roller capstan rubber belt 2. Demagnetize the playback head using a head demagnetizer. 3. Do not use a magnetized screwdriver for 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 (2.5V) unless otherwise noted.
Switch board

• Specified voltage : 2.5V. • Switch and control position TAPE switch : NORM VOLUME control : maximum AVLS switch : NORM

Retainer, Speaker

TAPE SECTION
Test Tape Type
WS-48A

30% amplitude modulation by 400Hz signal. Output level : as low as possible

AM FREQUENCY COVERAGE ADJUSTMENT Adjust for a maximum reading on level meter. L4 CT1 – 4 505kHz < 516.5kHz > [515kHz] 1,750kHz < 1,631.5kHz > [1,670kHz] AM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L1 620kHz 1,400kHz < 800kHz > < 1,300kHz > CT1 – 1

Signal
3kHz, 0dB

Used for
Tape Speed Adjustment

FM Section BAND : FM FM ST/MONO switch : FM ST
FM RF signal generator 0.01µF

Torque Measurement Torque
Speaker
FWD FWD back tension
2

Torque Meter

Meter Reading
20 – 42 g • cm (0.28 – 0.58 oz• inch) less than 2 g • cm (less than 0.03 oz• inch) more than 60g • cm (more than 0.83 oz• inch)

CQ-102C

Tape Speed Adjustment Procedure :
test tape WS-48A (3kHz, 0dB) set frequency counter 16 Ω
+ —

FF, REW

CQ-201B

(ANT TAP) (GND) 22.5kHz frequency deviation by 400Hz signal. Output level : as low as possible

FM FREQUENCY COVERAGE ADJUSTMENT Adjust for a maximum reading on level meter. L3 CT1 – 3 86.0MHz < 87.35MHz > [64.0MHz]

Tape Pulling Force Measurement Torque
Cassette holder sub assy
FWD CQ-403A

Torque Meter

Meter Reading
more than 40 g (more than 1.42 oz)

J302 (phones)

level meter 16Ω

109.5MHz < 108.25MHz > [109.5MHz]

2-6. DIAL POINTER SETTING
2 Align pointer with arrow marked side as shown in Fig. 1 and then fit to groove in the order of a and b.

Play back WS-48A (tape center part) and adjust RV601 so that the frequency counter reading becomes 3,015 – 2,985Hz. Frequency difference the beginning and the end of the tape should be within 1.5%. Adjustment Location :

set

+ —

FM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L2 CT1 – 2 86.0MHz < 87.35MHz > [68.0MHz]

J302 (phones)

109.5MHz < 108.25MHz > [109.5MHz]

Adjustment Location :

[MAIN BOARD] (Side A)

Ferrite-rod antenna sub assy Pointer
b

RV601

CT1- 4 : AM Frequency Coverage Adjustment CT1-3 : FM Frequency Coverage Adjustment T1 : AM IF Alignment

Align point Pointer
a

A B

(A=B)

Ferrite-rod antenna sub assy Knob (tune)
3

Fig. 1

Align point
L4 : AM Frequency Coverage Adjustment L3 : FM Frequency Coverage Adjustment L2 : FM Tracking Adjustment CT1- 2 : FM Tracking Adjustment CT1- 1 : AM Tracking Adjustment L1 : AM Tracking Adjustment
• Signal path. F : FM E : PB

1 Rotate tune knob fully to arrow direction.

Main board

–5–

–6–

–7–

–8–

–9–

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