6-4. Ic Pin Function Description - Sony WALKMAN WM-EX910 Service Manual

Q Q
3 7 6 3 1 5 1 5 0
• IC Block Diagrams
IC301 TA2123AF (EL)
36 35 34 33 32 31 30 29 28 27 26 25
BST
AGC
–
DET
+
–
+
PW B
C-AMP SW 37
MT TC 38 PW C + PW A
–
BEEP 39 BEEP
AMS OUT 40
RIPPLE
FILTER
MT SW 41
PW SW 42
SWITCH
BST SW 43 COMPARATOR
F/R SW 44
PRE SW 45
PRE A PRE B
M/N SW 46
MIX
PRE GND 47
VREF IN 48
VREF
MTL DRV
T E
L 1 3 9 4 2 2 9 6 5 1 3
1 8
2 3 4 5 6 7 9 10 11 12
IC303 NJM2185AV-TE2
14 13 12 11 10 9 8
G2 G1 V/I
+
BIAS
–
CIRCUIT SUM
WEIGHT
GM
A-CH BLOCK
w w w
B-CH BLOCK: SAME AS A-CH.
1 2 3 4 5 6 7
– 20 –
IC601 LB1994M-TLM
27
UT 28
24 RF IN
23 PW GND VT 29
22 OUT B
WT 30
21 OUT C
20 OUT A
19 VCC
18 BASE
17 RF OUT
W OUT 31
16 GND CURRENT
V OUT 32
15 AMS DET
NC 33
U OUT 34
14 AMS MIX
US 35
AMS SW
13 VS 36
WS
IC703 MM1305BWBE
OUT1 1
OUT2 2
OUT3 3
x a o
OUT4 4
. i
http://www.xiaoyu163.com
26 25 24 23 22 21 20
VI BUFFER COMPARATOR
BUFFER
P-SIG COMPARATOR D/DT PULSE
POWER
AMP
SOFT CLIP
PW•SW
CTRL
BLOCK
DECODER
Q Q
3 7
1 2 3 4 5 6 7 8 9
MC
8 VCC
7 CE
6 RIPPLE
u 1 6 3
5 GND
y
– 21 –
http://www.xiaoyu163.com
2 4
8 9 9

6-4. IC PIN FUNCTION DESCRIPTION

• MAIN BOARD IC705 ML63514-024TBZ060 (SYSTEM CONTROLLER)
Pin No. Pin Name I/O
1 AUDIO ATT O Audio attenuate control signal output It attenuates, when cue/review "H": attenuate
2 FWD SW I Tape direction switch (S702) input terminal "L": forward position
19
M CENTER
18
GND 3 CEN SW I Tape direction switch (S702) input terminal "L": center position
17 VI2
4 RVS SW I Tape direction switch (S702) input terminal "L": reverse position
16 VI1
5 CASSETTE SW I Cassette tape detect switch (S704-1) input terminal "L": cassette detected, "H": no cassette
15 IV
Communication serial data output to the remote commander, and connection detect signal input of
6 DATA/RMUM I/O
the remote commander
14 VC
Emphasizing sound control signal output to the TA2123AF (IC301)
7 REVIVE CTL O
"L": normal/mega bass/groove, "H": revive
13 PW
MEGA BASS Emphasizing sound control signal output to the TA2123AF (IC301)
8 O
CTL "L": normal/groove, "H": mega bass/revive
12 CI
Forward/reverse selection signal output to the TA2123AF (IC301)
9 F/R CTL O
"L": forward direction, "H": reverse direction
11 Vref
10 BOOST CTL O Bass boost control signal output to the TA2123AF (IC301) "L": off, "H": on
Also, this is used as control signal output for power on/off to the TA2123AF (IC301), DC/DC
11 AMP CTL O
converter (IC701) and voltage detector (IC703)
10 P SIG 12 MUTE CTL O Power on mute control signal output to the TA2123AF (IC301) "L": mute on
13 A/B SW I Detection signal input of side A or B "L": side A, "H": side B Not used
14 MODEL SELECT I Model destination setting terminal Fixed at "H" in this set
15 BATT DET I Battery voltage detection signal input (A/D input)
6 3 1 5 1 5 0 8 9
16 KEY IN I Key input from the main unit or remote commander (A/D input)
17 PM CTL O Plunger drive signal output terminal "L": plunger on
Motor speed control signal output to the capstan/reel motor driver IC (IC601)
18 SPEED CTL O
"L": normal speed, "H": 1/2 speed
Control signal output to the idler gear rotation detect circuit
19 PHOTO CTL O
"L": rotation detect circuit on
20 DOLBY CTL O Power on/off control signal output to the Dolby NR circuit "L": Dolby NR on
21 VDD1 — Power supply terminal (+2.5V) (for external interface)
22 VSS — Ground terminal
23 VDD — Power supply terminal (+1.5V)
24 VDDH — Power supply terminal (+2.5V) (for back-up boost)
25, 26 CB1, CB2 — Connected to capacitor for the boost power supply
27 VDDL — Power supply terminal (for internal logic)
28 XT0 I Main system clock input terminal (32.768kHz MHz)
29 XT1 O Main system clock output terminal (32.768kHz MHz)
30, 31 TST1B, TEST2B I Test input terminal Normally: fixed at "H"
32 OSCM — Connected to capacitor for the oscillator Not used (open)
I
33 OSC0 Connected to resistor for the high speed CR oscillator (550 kHz)
34 OSC1 O Connected to resistor for the high speed CR oscillator (550 kHz)
System reset signal input from the reset signal generator (IC704)
35 RESET I
"L": reset "L" is input for several 100 msec after power on, then it changes to "H"
m
36 BEEP O Beep sound signal output to the TA2123AF (IC301)
c o Rotation detect signal input of the capstan/reel motor (M601)
37 PHOTO (S) IN I
It detects rotation of the idler gear (A) (side S)
.
Rotation detect signal input of the capstan/reel motor (M601)
38 PHOTO (T) IN I
It detects rotation of the idler gear (A) (side T)
Whether a music is present or not from TA2123AF (IC301) is detected at auto music sensor
39 AMS IN I
"L": music is present, "H": music is not present
2
8 9 9
Description
"L": power off, "H": power on
2 4 9 8 2 9 9
– 22 –