Somy IT-B2 Service Manual

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Page 1

SERVICE MANUAL

SPECIFICATIONS

Dial signal Tone, 10 PPS (pulse) selectable Dimensions Approx. 152 × 71 × 216 mm (w/h/d)

(Approx. 6 × 2 7/8 × 8 5/8 inches)

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.

IT-B2

Mexican Model

TELEPHONE

MICROFILM

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.

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.

2-1. CABINET (LOWER)

2-2. MAIN BOARD

Open the cabinet (lower).

BTP 3X10

BTP 2X6

BTP 2.6X8

MAIN board

BTP 2.6X8

buzzer

modular jack

(J201)

2-3. KEY BOARD

BTP 2.6X8

KEY board

rubber key switch

button (12 key)

BTP 2.6X8

Page 4

IT-B2

3-1. PRINTED WIRING BOARDS

SECTION 3 DIAGRAMS

D101 B-2 D102 B-2 D103 B-2 D104 B-2 D105 A-3 D106 A-3 D107 A-3 D108 A-3 D109 B-6 D202 C-2 D205 C-5 D206 C-5 D207 D-5

IC101 A-4 IC201 D-2

Q201 C-1 Q202 C-1 Q204 E-4 Q205 C-4 Q206 B-4 Q207 E-4 Q208 C-4

ZD101 B-3 ZD201 C-2 ZD202 D-5

• Semiconductor Location

Ref. No. Location

Note:

• X : parts extracted from the component side.

• : Carbon pattern.

•¢: internal component.

• b : Pattern from the side which enables seeing.

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 1/

W or less unless otherwise

specified.

•¢: internal component.

• C : panel designation.

• U : B+ Line.

• Po wer voltage is dc 12V and fed with regulated dc power supply from J101 with 100 Ω in series.

• Voltage is dc with respect to ground under no-signal condition. no mark : OFF HOOK ( ) : ON HOOK

• V oltages are taken with a VOM (Input impedance 10 MΩ). Voltage variations may be noted due to normal production tolerances.

• Signal path.

N : RX (from TEL LINE) O : TX (to TEL LINE) P : bell

Page 6

• IC Block Diagrams

IC101 DBL5002

IC201 HM91652B

REGULATOR

WITH

HYSTERESIS

VCC

RSL

LFI

LFO

OUT

HFI

HFO

GND

AMP

LOW FREQ

OSC

HIGH FREQ

OSC

COLUMN

INTERFACE

CIRCUIT

OSC

DIVIDER

LNB

MEMORY

KERNEL CONTROL CIRCUIT

HDO21R420R319R218R117MODE16DTMF15PO

HKS13VDD12HFO

HDI

2C13C24C35C47

OSC IN

OSD OUT

MUTE

VSS

HFI

VDD

ROW/COLUMN PROGRAMMING

COUNTER

OUTPUT

INTERFACE

CIRCUIT

INPUT

INTERFACE

CIRCUIT

ROW

INTERFACE

CIRCUIT

SAVE

MEMORY

DECODER & DATA LATCH

PULSE

GENERATOR

D/A

CONVERTER

SECTION 4

EXPLODED VIEW

NOTE:

• The mechanical parts with no reference number in the exploded views are not supplied.

• Items marked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items.

• -XX and -X mean standardized parts, so they may have some difference from the original one.

• Color Indication of Appearance Parts Example :

KNOB, BALANCE (WHITE) ... (RED)

Parts Color Cabinet’s Color

Ref. No. Part No. Description Remark

• Accessories and packing materials are given in the last of this parts list.

SP101

J201

SW101

1 3-925-103-01 FOOT, RUBBER 2 7-685-533-19 SCREW +BTP 2.6X6 TYPE2 N-S 3 X-3371-275-1 HANDSET ASSY, LOCAL

* 4 A-3672-801-A MAIN BOARD, COMPLETE

5 1-762-340-11 SWITCH, RUBBER KEY

6 4-908-618-21 SCREW (+BTP) (2X6) 7 3-925-097-01 CABINET (UPPER) 8 3-925-098-01 CABINET (LOWER) 9 3-925-099-01 BUTTON (12 KEY)

10 3-925-100-01 LEVER (HOOK) 11 3-925-101-01 HANGER (HANDSET) 12 7-685-547-11 SCREW +BTP 3X10 TYPE2 N-S

* 13 1-660-943-11 KEY BOARD

14 1-769-626-11 WIRE (FLAT TYPE) (9 CORE)

15 1-696-455-11 CORD, CURL J201 1-770-504-11 JACK, MODULAR (4C) 4P (HANDSET) SP101 1-529-116-11 BUZZER, PIEZOELECTRIC SW101 1-692-494-11 SWITCH, HOOK (HOOK)

Page 7

SECTION 5

ELECTRICAL PARTS LIST

NOTE:

• Due to standardization, replacements in the parts list may be different from the parts specified in the diagrams or the components used on the set.

• -XX and -X mean standardized parts, so they may have some difference from the original one.

• RESISTORS All resistors are in ohms. METAL:Metal-film resistor. METAL OXIDE: Metal oxide-film resistor. F:nonflammable

• Items marked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items.

• SEMICONDUCTORS In each case, u : µ, for example: uA.. : µA.. uPA.. : µPA.. uPB.. : µPB.. uPC.. : µPC.. uPD.. : µPD..

• CAPACITORS uF : µF

• COILS uH : µH

Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark

When indicating parts by reference number, please include the board.

KEY MAIN

* 1-660-943-11 KEY BOARD

**********

< CONNECTOR >

* CN101B 1-569-704-11 HOLDER, CABLE (PC BOARD) 9P *************************************************************

* A-3672-801-A MAIN BOARD, COMPLETE

*********************

1-769-626-11 WIRE (FLAT TYPE) (9 CORE)

< CAPACITOR >

C101 1-137-479-11 FILM 1uF 5% 400V C102 1-126-964-11 ELECT 10uF 20% 50V C103 1-126-959-11 ELECT 0.47uF 20% 50V C104 1-163-215-00 CERAMIC CHIP 0.0027uF 10% 50V C201 1-128-551-11 ELECT 22uF 20% 25V

C203 1-163-038-00 CERAMIC CHIP 0.1uF 25V C204 1-126-933-11 ELECT 100uF 20% 16V C205 1-163-038-00 CERAMIC CHIP 0.1uF 25V C206 1-163-205-00 CERAMIC CHIP 0.001uF 5% 50V C207 1-163-205-00 CERAMIC CHIP 0.001uF 5% 50V

C208 1-163-205-00 CERAMIC CHIP 0.001uF 5% 50V C209 1-163-205-00 CERAMIC CHIP 0.001uF 5% 50V C210 1-163-205-00 CERAMIC CHIP 0.001uF 5% 50V C211 1-163-205-00 CERAMIC CHIP 0.001uF 5% 50V C212 1-163-205-00 CERAMIC CHIP 0.001uF 5% 50V

C213 1-163-205-00 CERAMIC CHIP 0.001uF 5% 50V C215 1-126-959-11 ELECT 0.47uF 20% 50V C216 1-163-021-11 CERAMIC CHIP 0.01uF 10% 50V C217 1-163-021-11 CERAMIC CHIP 0.01uF 10% 50V C218 1-163-021-11 CERAMIC CHIP 0.01uF 10% 50V

C220 1-126-796-11 ELECT 22uF 20% 25V C222 1-126-176-11 ELECT 220uF 20% 10V C223 1-163-055-00 CERAMIC CHIP 0.0047uF 10% 50V C224 1-163-038-00 CERAMIC CHIP 0.1uF 25V C225 1-115-871-11 ELECT 1uF 20% 50V

C226 1-163-213-00 CERAMIC CHIP 0.0022uF 5% 50V C227 1-163-021-11 CERAMIC CHIP 0.01uF 10% 50V C228 1-163-213-00 CERAMIC CHIP 0.0022uF 5% 50V C230 1-163-063-00 CERAMIC CHIP 0.022uF 50V C240 1-163-063-00 CERAMIC CHIP 0.022uF 50V

C250 1-163-205-00 CERAMIC CHIP 0.001uF 5% 50V C251 1-163-063-00 CERAMIC CHIP 0.022uF 50V

C252 1-161-039-00 CERAMIC 0.001uF 10% 50V C260 1-164-159-21 CERAMIC 0.1uF 50V

< CONNECTOR >

* CN101A 1-569-704-11 HOLDER, CABLE (PC BOARD) 9P

< DIODE >

D101 8-719-059-25 DIODE 1A6 D102 8-719-059-25 DIODE 1A6 D103 8-719-059-25 DIODE 1A6 D104 8-719-059-25 DIODE 1A6 D105 8-719-989-91 DIODE 1N4148A-T265

D106 8-719-989-91 DIODE 1N4148A-T265 D107 8-719-989-91 DIODE 1N4148A-T265 D108 8-719-989-91 DIODE 1N4148A-T265 D109 8-719-989-91 DIODE 1N4148A-T265 D202 1-808-100-11 DIODE MA700

D205 8-719-989-91 DIODE 1N4148A-T265 D206 8-719-989-91 DIODE 1N4148A-T265 D207 8-719-989-91 DIODE 1N4148A-T265

< FUSE >

F101 1-533-713-11 FUSE (500mA/250V)

< IC >

IC101 8-759-595-76 IC DBL5002 IC201 8-759-582-35 IC HM91652B

< JACK >

J101 1-766-250-21 JACK, MODULAR (2C) 6P (LINE)

< TRANSISTOR >

Q201 8-729-804-21 TRANSISTOR 2SA1319TP-S Q202 8-729-803-98 TRANSISTOR 2SC3332TP-S Q204 8-729-173-38 TRANSISTOR 2SA733TP-Q Q205 8-729-173-38 TRANSISTOR 2SA733TP-Q Q206 8-729-025-58 TRANSISTOR KSC2331Y

Q207 8-729-173-38 TRANSISTOR 2SA733TP-Q Q208 8-729-119-76 TRANSISTOR 2SA733TP-P

< RESISTOR >

R101 1-249-421-11 CARBON 2.2K 5% 1/4W R102 1-249-421-11 CARBON 2.2K 5% 1/4W

Page 8

Sony Corporation

Digital Telecommunication Company

9-923-812-31

99G04034-1

Printed in Japan C1999. 7

Published by Mobile Electronics Company

Quality Assurance Dept.

IT-B2

MAIN

R103 1-216-071-00 METAL CHIP 8.2K 5% 1/10W R104 1-216-101-00 METAL CHIP 150K 5% 1/10W R105 1-218-763-11 RES,CHIP 300K 5% 1/10W R106 1-216-049-11 RES,CHIP 1K 5% 1/10W R107 1-216-073-00 METAL CHIP 10K 5% 1/10W

R108 1-216-097-00 RES,CHIP 100K 5% 1/10W R201 1-259-882-11 CARBON 3.3M 5% 1/4W R202 1-259-882-11 CARBON 3.3M 5% 1/4W R203 1-216-113-00 METAL CHIP 470K 5% 1/10W R204 1-216-033-00 METAL CHIP 220 5% 1/10W

R205 1-216-295-00 SHORT 0 R206 1-216-093-00 RES,CHIP 68K 5% 1/10W R207 1-216-053-00 METAL CHIP 1.5K 5% 1/10W R210 1-216-121-00 RES,CHIP 1M 5% 1/10W R211 1-216-069-00 METAL CHIP 6.8K 5% 1/10W

R213 1-216-057-00 METAL CHIP 2.2K 5% 1/10W R214 1-216-113-00 METAL CHIP 470K 5% 1/10W R215 1-216-073-00 METAL CHIP 10K 5% 1/10W R216 1-216-073-00 METAL CHIP 10K 5% 1/10W R217 1-216-113-00 METAL CHIP 470K 5% 1/10W

R218 1-216-029-00 METAL CHIP 150 5% 1/10W R219 1-216-059-00 METAL CHIP 2.7K 5% 1/10W R220 1-216-049-11 RES,CHIP 1K 5% 1/10W R221 1-216-065-00 RES,CHIP 4.7K 5% 1/10W R222 1-216-071-00 METAL CHIP 8.2K 5% 1/10W

R223 1-216-053-00 METAL CHIP 1.5K 5% 1/10W R224 1-249-400-11 CARBON 39 5% 1/4W R225 1-249-400-11 CARBON 39 5% 1/4W R226 1-249-400-11 CARBON 39 5% 1/4W R227 1-249-400-11 CARBON 39 5% 1/4W

R228 1-216-057-00 METAL CHIP 2.2K 5% 1/10W R229 1-216-113-00 METAL CHIP 470K 5% 1/10W R230 1-216-001-00 METAL CHIP 10 5% 1/10W R231 1-216-093-00 RES,CHIP 68K 5% 1/10W R232 1-216-053-00 METAL CHIP 1.5K 5% 1/10W

R242 1-216-049-11 RES,CHIP 1K 5% 1/10W R244 1-216-049-11 RES,CHIP 1K 5% 1/10W R245 1-216-049-11 RES,CHIP 1K 5% 1/10W R251 1-216-198-00 RES,CHIP 1K 5% 1/8W R253 1-259-882-11 CARBON 3.3M 5% 1/4W

R261 1-216-017-00 RES,CHIP 47 5% 1/10W R300 1-249-441-11 CARBON 100K 5% 1/4W

< VARISTOR >

SA101 1-801-271-11 VARISTOR (VF07M10820K)

< SWITCH >

SW101 1-692-494-11 SWITCH, HOOK (HOOK) SW102 1-692-207-21 SWITCH, SLIDE (RINGER LEVEL) SW201 1-572-903-51 SWITCH, SLIDE (DIAL MODE)

< VIBRATOR >

X201 1-579-673-11 VIBRATOR, CERAMIC (3.58MHz)

< DIODE >

ZD101 8-719-155-07 DIODE RD27EL2TN ZD201 8-719-101-50 DIODE RD5.1EL2TN ZD202 8-719-154-61 DIODE RD6.8EL2TN

*************************************************************

MISCELLANEOUS

***************

5 1-762-340-11 SWITCH, RUBBER KEY 15 1-696-455-11 CORD, CURL J201 1-770-504-11 JACK, MODULAR (4C) 4P (HANDSET) SP101 1-529-116-11 BUZZER, PIEZOELECTRIC

*************************************************************

ACCESSORIES & PACKING MATERIALS

********************************

1-696-453-11 CORD (WITH MODULAR PLUG) (LINE) (215cm) 1-696-454-11 CORD (WITH MODULAR PLUG) (LINE) (15cm) 3-378-839-01 LABEL (SCALE CARD) 3-798-915-14 MANUAL, INSTRUCTION (ENGLISH) 3-798-915-24 MANUAL, INSTRUCTION (SPANISH)

X-3370-607-1 CASE ASSY, WALL HOOK

Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark