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Sony SRF-QT1 Service Manual

Fm stereo radio
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SERVICE MANUAL
Ver 1.0 1999. 12
MICROFILM
SPECIFICATIONS
Frequency range:
FM 87.5 – 108 MHz
Output:
i (headphones) jack
(ø 3.5 mm stereo minijack)
Power output:
1.5 mW + 1.5 mW
(at 10 % harmonic distortion)
Power requirements:
1.5 V DC, one R03 (size AAA) battery
Dimensions:
Approx. 49.8
(2
2
5
/
8
projecting parts and controls
Mass:
Approx. 50 g (1.8 oz) incl. a battery and
headphones
Accessories supplied:
Stereo headphones (1)
Carrying pouch (1)
Design and specifications are subject to change without notice
SRF-QT1
64.8
26.0 mm (w/h/d)
1
1
/
inches) not incl.
16
FM STEREO RADIO
E Model

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Summary of Contents for Sony SRF-QT1

  • Page 1 SRF-QT1 SERVICE MANUAL E Model Ver 1.0 1999. 12 SPECIFICATIONS Frequency range: FM 87.5 – 108 MHz Output: i (headphones) jack (ø 3.5 mm stereo minijack) Power output: 1.5 mW + 1.5 mW (at 10 % harmonic distortion) Power requirements: 1.5 V DC, one R03 (size AAA) battery...

  • Page 2: Table Of Contents

    SECTION 1 GENERAL This section is extracted from instruction manual. 1. GENERAL ................2 2. DISASSEMBLY 2-1. Lid, Battery Case ..............3 2-2. Cabinet (Front), Knob (Tune) ..........3 2-3. Main Board ................4 3. ELECTRICAL ADJUSTMENT ........5 4. DIAGRAMS 4-1.

  • Page 3: Disassembly

    SECTION 2 DISASSEMBLY • The equipment can be removed using the following procedure. Lid ,Battery Case Main Board Cabinet (Front), Knob (Tune) Note : Follow the disassembly procedure in the numerical order given. 2-1. LID, BATTERY CASE 2 Two screws (B1.7 1 Slide Lid, Battery Case in the direction of the arrow.

  • Page 4: Main Board

    2-3. MAIN BOARD 2 Remove the MAIN board in the direction of the arrow. Lead wire (red) Lead wire (white) 1 Remove the leads at the two points of battery terminals (+)/(-) by unsoldering. — 4 —...

  • Page 5: Electrical Adjustment

    SRF-QT1 SECTION 3 SECTION 4 ELECTRICAL ADJUSTMENT DIAGRAMS Note on Printed Wiring Board: Note on Schematic Diagram: FM VCO Adjustment 0dB=1µV • X : parts extracted from the conductor side. • All capacitors are in µF unless otherwise noted. pF: µµF Procedure : •...
  • Page 6 SRF-QT1 • Refer to page 6 for Note on Printed Wiring Board. 4-1. PRINTED WIRING BOARD MAIN BOARD MAIN BOARD (SIDE A) (SIDE B) DRY BATTERY SIZE "AA" (IEC DESIGNATION) 1PCS, 1.5V (POWER) TP10 Tuning (GND) (GND) 1-676-431 1-676-431 (11) (11) —...
  • Page 7 SRF-QT1 • Refer to page 6 for Note on Schematic Diagram and IC block diagrams. 4-2. SCHEMATIC DIAGRAM Tuning " " — 9 — — 10 —...

  • Page 8: Exploded Views

    SECTION 5 EXPLODED VIEWS NOTE: • -XX, -X mean standardized parts, so they may • Hardware (# mark) list and accessories and have some differences from the original one. packing materials are given in the last of this • Items marked “*” are not stocked since they parts list.

  • Page 9: Electrical Parts List

    SRF-QT1 SECTION 6 MAIN ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the • CAPACITORS: • SEMICONDUCTORS parts list may be different from the parts uF: µF In each case, u: µ, for example: specified in the diagrams or the components •...

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