Sony IT-B9 Service Manual page 3

• IC Block Diagrams
U1 BA8206
VCC 1
AMP 8 OUT
POWER
SUPPLY
RSL 2
WITH
7 HFI
HYSTERESIS
LFI 3 6 HFO
LOW
HIGH
FREQ.
FREQ.
OSC
LFO OSC GND
4 5
U80 MC34118DW
28 27 26 25 24 23
R
400
R
BIAS
BACK GROUND
NOISE MONITER
VR
FILTER
R
+ –
R
–
+
1 2 3 4 5 6
U110 NJM2113M
CD 1 8 VOUT2
+
2 GND
VREF 7
–
+VIN 3 6 V+
+
–VIN 4 – VOUT1
5
22 21 20 19 18 17 16 15
BACK GROUND
NOISE MONITER
LEVEL DET
DP-DET
–
+
RX ATT
15mV
VR
ATT CONTROL
LEVEL DET
TX ATT
VR
+ –
VR
7 8 9 10 11 12 13
– 9 –
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.
2
6
A
SP110
VCC
AGC
#3
#1
Ref. No. Part No. Description
1 3-025-136-01 HANGER (HANDSET) (GRAY) ... (GRAY,BLUE)
1 3-025-136-11 HANGER (HANDSET) (CREAM)
2 3-025-132-01 CABINET (UPPER) (GRAY)
2 3-025-132-11 CABINET (UPPER) (CREAM)
14
2 3-025-132-21 CABINET (UPPER) (BLUE)
3 3-025-137-01 LEVER (HOOK) (GRAY) ... (GRAY,BLUE)
3 3-025-137-11 LEVER (HOOK) (CREAM)
4 3-025-134-01 BUTTON (12 KEY) (GRAY) ... (GRAY,BLUE)
4 3-025-134-11 BUTTON (12 KEY) (CREAM)
5 1-771-515-11 SWITCH, RUBBER KEY
6 1-765-574-11 CORD, CURL (CREAM)
6 1-775-798-31 CORD, CURL (BLUE)
6 1-775-798-41 CORD, CURL (GRAY)
7 3-025-139-01 FOOT, RUBBER
SECTION 4
EXPLODED VIEW
• -XX and -X mean standardized parts, so • Accessories and packing materials and
they may have some difference from the hardware (# mark) list are given in
original one. the last of this parts list.
• Color Indication of Appearance Parts
Example :
KNOB, BALANCE (WHITE) ... (RED)
Parts Color Cabinet's Color
10
1
#1
3
X1
(not supplied)
JP50
4
A
5
7
#2
8
12
T80
Remark Ref. No. Part No. Description
* 8 1-670-811-11 KEY BOARD
* 9 A-3672-566-A MAIN BOARD, COMPLETE (Canadian)
* 9 A-3672-571-A MAIN BOARD, COMPLETE (E)
10 X-3376-493-1 HANDSET ASSY (GRAY)
10 X-3376-494-1 HANDSET ASSY (CREAM)
10 X-3376-495-1 HANDSET ASSY (BLUE)
11 X-3376-481-1 CABINET (LOWER) ASSY (Canadian:GRAY)
11 X-3376-482-1 CABINET (LOWER) ASSY (E:GRAY)
11 X-3376-483-1 CABINET (LOWER) ASSY (E:CREAM)
11 X-3376-484-1 CABINET (LOWER) ASSY (E:BLUE)
12 3-025-138-01 CAP, MICROPHONE
JP50 1-785-426-11 JACK, MODULAR (4C) 4P (HANDSET)
SP110 1-529-151-11 SPEAKER (5.7cm)
T80 1-542-368-11 MICROPHONE, ELECTRET CONDENSER
– 10 –
#1
9
(including
12, JP50, T80)
11
(including X1)
7
#2
Remark