Sony IT-B2 Service Manual
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Sony IT-B2 Service Manual

Sony IT-B2 Service Manual

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SERVICE MANUAL
MICROFILM
SPECIFICATIONS
Dial signal
Tone, 10 PPS (pulse) selectable
Approx. 152 × 71 × 216 mm (w/h/d)
Dimensions
(Approx. 6 × 2
Mass
Approx. 560 g
(Approx. 1 lb 4 oz)
Supplied accessories
Telephone line cords (2)
Wall bracket (1)
Screws (2) (attached inside the wall bracket)
Directory label (1 sheet)
Design and specifications are subject to change without notice.
× 8
inches)
7/8
5/8
Notes on Chip Component Replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
IT-B2
Mexican Model
TELEPHONE
1

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Summary of Contents for Sony IT-B2

  • Page 1 IT-B2 SERVICE MANUAL Mexican Model SPECIFICATIONS Dial signal Tone, 10 PPS (pulse) selectable Approx. 152 × 71 × 216 mm (w/h/d) Dimensions (Approx. 6 × 2 × 8 inches) Mass Approx. 560 g (Approx. 1 lb 4 oz) Supplied accessories...
  • Page 2 SECTION 1 GENERAL This section is extracted from instruction manual.
  • Page 3 SECTION 2 DISASSEMBLY Note : Follow the disassembly procedure in the numerical order given. 2-3. KEY BOARD 2-1. CABINET (LOWER) 2 BTP 2.6X8 1 BTP 2.6X8 3 Open the cabinet (lower). 3 KEY board 4 rubber key switch 5 button (12 key) 1 BTP 3X10 2 BTP 3X10 2-2.
  • Page 4 IT-B2 SECTION 3 DIAGRAMS 3-1. PRINTED WIRING BOARDS • Semiconductor Location Ref. No. Location D101 D102 D103 D104 D105 D106 D107 D108 D109 D202 D205 D206 D207 IC101 IC201 Q201 Q202 Q204 Q205 Q206 Q207 Q208 ZD101 ZD201 ZD202 Note: •...
  • Page 5 IT-B2 3-2. SCHEMATIC DIAGRAM • Refer to page 6 for IC Block Diagrams. Note: • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums. • All resistors are in Ω and W or less unless otherwise specified.
  • Page 6 SECTION 4 EXPLODED VIEW NOTE: • IC Block Diagrams • The mechanical parts with no reference • -XX and -X mean standardized parts, so • Accessories and packing materials are number in the exploded views are not supplied. they may have some difference from the given in the last of this parts list.

  • Page 7: Electrical Parts List

    SECTION 5 MAIN ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in • Items marked “*” are not stocked since When indicating parts by reference the parts list may be different from the they are seldom required for routine service. number, please include the board.
  • Page 8 IT-B2 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R103 1-216-071-00 METAL CHIP 8.2K 1/10W < VIBRATOR > R104 1-216-101-00 METAL CHIP 150K 1/10W R105 1-218-763-11 RES,CHIP 300K 1/10W X201 1-579-673-11 VIBRATOR, CERAMIC (3.58MHz) R106...

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