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Sony IT-B7 Service Manual
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Sony IT-B7 Service Manual

Sony IT-B7 Service Manual

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SERVICE MANUAL
REVISED
MICROFILM
Photo : Gray type
SPECIFICATIONS
Dial signal
Tone, 10 PPS (pulse) selectable
Approx. 165.5 × 84 × 219 mm (w/h/d)
Dimensions
(Approx. 6
5/8
Mass
Approx. 510 g
(Approx. 1 lb. 2 oz.)
Supplied accessories
Telephone line cords (2) (Canadian)
Telephone line cord (1) (E, SP)
Wall bracket (1) (Canadian)
Design and specifications are subject to change without notice.
• Abbreviation
SP : Singapore model
– 1 –
× 3
× 8
inches)
3/8
5/8
Notes on Chip Component Replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
IT-B7
Canadian Model
E Model
TELEPHONE

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Summary of Contents for Sony IT-B7

  • Page 1 IT-B7 SERVICE MANUAL Canadian Model E Model REVISED Photo : Gray type SPECIFICATIONS Dial signal Tone, 10 PPS (pulse) selectable Approx. 165.5 × 84 × 219 mm (w/h/d) Dimensions × 3 × 8 (Approx. 6 inches) Mass Approx. 510 g (Approx.
  • Page 2 SECTION 1 GENERAL This section is extracted from instruction manual. – 2 –...
  • Page 3 SECTION 2 DISASSEMBLY Note : Follow the disassembly procedure in the numerical order given. 2-2. KEY BOARD 2-1. CABINET (LOWER) 1 BTP 2.6X6 2 KEY board 1 BTP 3X10 3 rubber key switch 4 button (12 key) 2 BTP 3X10 2-3.
  • Page 4 IT-B7 SECTION 3 DIAGRAMS 3-1. PRINTED WIRING BOARDS — Canadian Model — • Semiconductor Location Ref. No. Location Ref. No. Location C-10 F-12 C-10 F-12 B-10 B-10 B-11 B-11 D-11 E-13 D-11 LED1 ZD10 D-11 Note: C-12 ZD51 D-10 • X : parts extracted from the component side.
  • Page 5 IT-B7 3-2. SCHEMATIC DIAGRAM — Canadian Model — Note: • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics • IC Block Diagram and tantalums. • All resistors are in Ω and...
  • Page 6 IT-B7 3-3. PRINTED WIRING BOARDS — E, Singapore Model — • Semiconductor Location Ref. No. Location Ref. No. Location C-10 F-12 C-10 B-10 B-10 C-11 C-11 C-11 C-11 E-11 D-11 E-10 E-10 ZD10 D-11 Note: • X : parts extracted from the component side.
  • Page 7 IT-B7 3-4. SCHEMATIC DIAGRAM — E, Singapore Model — Note: • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics • IC Block Diagram and tantalums. • All resistors are in Ω and...

  • Page 8: Section 4 Exploded View

    SECTION 4 SECTION 5 MAIN EXPLODED VIEW ELECTRICAL PARTS LIST NOTE: NOTE: • The mechanical parts with no reference • -XX and -X mean standardized parts, so • Accessories and packing materials and • Due to standardization, replacements in • Items marked “*” are not stocked since When indicating parts by reference number in the exploded views are not supplied.
  • Page 9 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 8-719-991-33 DIODE 1SS133T-77 (Canadian) 1-216-049-11 RES,CHIP 1/10W 8-719-055-76 DIODE 1N4148 (E,SP) (E,SP) 8-719-055-76 DIODE 1N4148 (E,SP) 1-249-469-11 CARBON 100K 1/4W 1-216-294-00 METAL CHIP 1/8W < FUSE > 1-216-109-00 METAL CHIP 330K 1/10W...

  • Page 10: Manual, Instruction

    IT-B7 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-216-063-00 RES,CHIP 3.9K 1/10W 8-759-559-34 IC LC662204A-4K56 1-216-075-00 METAL CHIP 1/10W 1-216-048-00 METAL CHIP 1/10W < VIBRATOR > (Canadian) 1-216-053-00 METAL CHIP 1.5K 1/10W 1-577-306-11 OSCILLATOR, CERAMIC (1MHz)