Advertisement
TUNER ADJUSTMENTS
Use a plastic screw driver for adjustments.
Adjust the intermediate frequency of AM to the frequency of ceramic filter.
Set of unit
:
Supply voltage
AC 230V
:
speaker impedance
4 ohms
:
standard output
50 mW
:
Function select:
TUNER
a. Parts Location
a.AM Adjustment
Adjusting
Step
Circuit
Closed the output
termial by sweep
1
IF
generator,it place
Tuning
Connect AM SG to
2
cover range
Connect AM SG to
3
Tracking
b.FM Adjustment
Adjusting
Step
Circuit
IC211 Pin22(H)
1
IF
TP6(E)
Tuning
2
cover range
3
Tracking
XF233
C2211
+13V
MUTE
R4309
+9V
R4310
TP6
C2207
C2206
TP7
TP9
J2307
J2308
J4224
D4018
C4315
Band :AM
Connections
Input
Output
TP7(L)
TP9(R)
TP6(E)
to AM ANT
Connect VTVM to
speaker terminals.
test loop
Connect VTVM to
test loop
speaker terminals.
Band :FM
Connection
Input
Output
IC211 Pin19(H)
TP6(E)
Connect VTVM to
FM ANT
speaker terminals.
Connect VTVM to
FM ANT
speaker terminals.
IC211
C2
1AD9B10C33600
R2203
C2102
C2101
R2101
C2204
SG201
R2304
C2501
C2205
R2202
C2105
C2312
J2201
C2311
C2310
C2305
XF221
C2309
R2401
R2402
R2403
E
XF222
Q2401
R2406
T2301 L2201
L2120
C4 L2121
SG
Position of
Frequency
Tuning dial
450 KHz
515KHz
522 KHz
515KHz
1611 KHz
1640KHz
603 KHz
600KHz
1404 KHz
1400KHz
FM Dummy antenna: 75 ohms unbalance
SG
Position of
Frequency
Tuning dial
107 MHz
87 MHz
87.00 MHz
87.00 MHz
109.00 MHz
109.00 MHz
90.00 MHz
90.00 MHz
106.00 MHz
106.00 MHz
- 2 -
L2101
C1
L2102
Q2501
J2302
R2503
R2502
C2106
VC201
C2502
D2104
R2501
R2504
R2902
L2101
R2901
FM
FM ST
R2103
R2209
AM
S2001
C2308
W2002
C2307
R2302
R2204
C2402
TA
R2207
L2121
CD
R2211
D2201
TU
C2214
R2210
Q2202
C3
Adjustment
Oscilloscope
T2301
L2121
C3
L2120
C4
Adjustment
Oscilloscope
L2201
XF233
L2102
C1
L2101
C2
This is a basic tuner adjustments.
VTVM
Max.
Max.
Max.
Max.
VTVM
Max.
Max.
Max.
Advertisement
