SONY ITB2
Instrukcja Serwisowa

SECTION 4 EXPLODED VIEW
� IC Block Diagrams IC101 DBL5002
R4 R3 R2 HDO

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.
8 OUT

� -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) N Parts Color Cabinet�s Color

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

VCC 1

RSL 2

REGULATOR WITH HYSTERESIS

R1

MODE

AMP 7 HFI

3
LFI 3 LOW FREQ OSC LFO 4 HIGH FREQ OSC 5 GND

10 2

HDI

6 HFO

C1

11
C2

SW101

2
OSC IN

15 14
J201

IC201 HM91652B
HKS

4 6
VDD
13 12

DTMF

PO

22

21 20 19 18

17

16

15

14

8 7
SP101

PULSE GENERATOR

DECODER & DATA LATCH

ROW/COLUMN PROGRAMMING COUNTER LNB MEMORY

D/A CONVERTER

HFO

9

SAVE MEMORY

MEMORY

OUTPUT INTERFACE CIRCUIT

KERNEL CONTROL CIRCUIT

INPUT INTERFACE CIRCUIT

5 13 1

VDD

COLUMN INTERFACE CIRCUIT

DIVIDER

ROW INTERFACE CIRCUIT

12
VDD

12 1

OSC

2

2

1

23456

78

9

10

11

Ref. No. 1 2 3 *4 5 6 7 8 9

Part No. 3-925-103-01 7-685-533-19 X-3371-275-1 A-3672-801-A 1-762-340-11 4-908-618-21 3-925-097-01 3-925-098-01 3-925-099-01

Description FOOT, RUBBER SCREW +BTP 2.6X6 TYPE2 N-S HANDSET ASSY, LOCAL MAIN BOARD, COMPLETE SWITCH, RUBBER KEY SCREW (+BTP) (2X6) CABINET (UPPER) CABINET (LOWER) BUTTON (12 KEY)

Remark

Ref. No. 10 11 12 * 13 14 15 J201 SP101 SW101

Part No. 3-925-100-01 3-925-101-01 7-685-547-11 1-660-943-11 1-769-626-11 1-696-455-11 1-770-504-11 1-529-116-11 1-692-494-11

Description LEVER (HOOK) HANGER (HANDSET) SCREW +BTP 3X10 TYPE2 N-S KEY BOARD WIRE (FLAT TYPE) (9 CORE) CORD, CURL JACK, MODULAR (4C) 4P (HANDSET) BUZZER, PIEZOELECTRIC SWITCH, HOOK (HOOK)

Remark

MUTE

OSD OUT

VSS

HFI

C3 C4 C5

6

6

N