14
14
WM-FX277
5-5. SCHEMATIC DIAGRAM
z
Refer to page 15 for Notes.
z
Refer to page 15 for Waveforms.
z
Refer to page 16 for IC Block Diagrams.
COM
RI
S/S
PRE GND
PRE OUT(L)
PRE NF(L)
PRE OUT(R)
PRE NF(R)
FWDIN(L)
REVIN(L)
FWDIN(R)
REVIN(R)
VSP
IN+
M VREF
M GND
L.B SW
DET OUT
MIX IN(L)
H.PIN(L)
MIX IN(R)
H.PIN(R)
L.P2
VREF
R.REF
SYSTEM
POWER OUT(L)
POWER GND
POWER OUT(COM)
VCC
POWER OUT(R)
POWER MUTE
POWER IN(L)
POWER IN(R)
M VCC
OSC
UB
VB
WB
DR
MPGND
FC
OUT
MIX
OUT(L)
MIX
OUT(R)
W OUT
V OUT
U OUT
LIQUID CRYSTAL
N/R SW
BACK UP
AMP ON
BEEP
BATT CHECK
BATT REF
VSS
RADIO ON
MEGA BASS
MUTE
TAPE
PRE CTL
MOTOR CTL
ID
S13
TEST 1
LPF GND
LPF OUT
LPF IN
E.O
VSS
FM IN
VDD
TU VCC
RESET
DBR1
DBR2
DBR3
DBR4
SD
BAND
HOLD
PB2
PB3
PA0
PA1
PA2
TEST2
S12
S11
S10
S9
S8
S7
S6
S5
S4
S3
S2
S1
COM4
COM3
COM2
COM1
PB1
PA3
X OUT X IN
LOCAL
DX
NORM
CrO2/METAL
-
+
ENTER
AM
FM
PRESET-
MEGA BASS
TUNING
OFF
RCH
LCH
HEAD
PLAYBACK
-1
-2
AVLS
NORM
LIMIT
DRY BATTERY
SIZE "AA"
2PCS, 3V
(IEC DESIGNATION R6)
W
V
U
CAPSTAN/REEL
MOTOR
VOLUME
-1
-2
(LB8115W-NB-TLM)
AM
ANTENNA
AM
IN
FM
RF
FM
OSC
AM
OSC
L-0
R-0
QUAD
ST
LED
TUN
LED
GND
FM
IF
AM
IF
AGC
GND
FM
IN
VCC1
VCC2
LPF3
FM/AM
MIX
LPF2
LPF1
IN
OUT
MPX
DET
AFC
COM
L1
SYSTEM
CONTROL
FM/AM
DET,FM MPX
FRONT-END,IF AMP,
AM IN
+1.5V REG
MOTOR CONTROL
PB AMP,
POWER AMP
TAPE
SPEED
DISPLAY
LCD701
HOLD
ON
OFF
HP601
ST
FM MONO
FERRITE BAR
OSC AMP
FM
TRACKING
L2
TRACKING
AM
L1,CT1
FREQUENCY
COVERAGE
FM
L3
AM
FREQUENCY
COVERAGE
L4
5E,6E,MX
AM IF
5E,6E,MX
5E,6E,MX
5E,6E,MX
*R18
4.7k
15k
5E,6E,MX
*C25,26
0.022
0.015
:5E,6E,MX
E,9E,TW,CH
E,9E,TW,CH
E,9E,TW,CH
E,9E,TW,CH
E,9E,TW,CH
E,9E,TW,CH
:E,9E,TW,CH
