SANYO BIG-1000 Service Manual
FILE .NO
BIG-1000K (SS)Service Manual
Portable Radio
Cassette Recorder
PRODUCT CODE No.Specifications
(CASSETTE SECTION)
Recording system: DC bias, 4 track stereo
Erasing system: Magnet erase
Tape speed: 4.75cm/sec.
Fast forward and rewind time: 150 sec. (C-60 tape)
Frequency response: 80 - 12000Hz
(RADIO SECTION)
Tuning ranges: FM: 88 - 108 MHz
SW2: 8 - 24 MHz
SW1: 2.2 - 8 MHz
MW: 540 - 1600 kHz
Antennas: Built-in ferrite bar and telescopic rod antennas
(GENERAL)
Power output: 140W (P.M.P.O.)
Speaker: Woofer : 10 cm X 2, 4 ohms
Tweeter : 4 cm X 2, 4 ohms
Terminal impedance: CD/VCD IN: 47k ohms
PHONES: 32 ohms
Power source: AC: 110~120V/220~240V, 50/60Hz
DC: 12V (8 "D" size batteries)
Dimensions: 670 x 230 x 190 mm (W x H x D)
Weight (approx.): 5.3kg without batteries
1 164 030 10(SS)
REFERENCE No. SM1800002
Specifications subject to change without notice.
1
REMOVAL AND INSTALLATION
• Disconnect the power cord's plug from the electrical outlet.
• All wiring should be returned to the original position after works is completed.
• All removal screws have to be re-assembling.
• Arrange the lead wires so that they are not near the heat sink.
1. CABINET
2. SPEAKER BOX RELEASE
2
ADJUSTMENT
TUNER SECTION
Standard modulation is 1kHz of 400Hz at 30% amplitude for AM and 1kHz or 400Hz at 22.5kHz deviation for
FM.
S.S.G.(Standard Signal Generator)
V.T.V.M.(Voltage Meter)
MW Section
Fig. 1
Step Adjustment Connection Test Points S.S.G. Frequency Remarks
1 IFT Fig.1 TP3,TP4
455kHz
(1kHz Mod.)
Adjust for maximum output
Fig.2
TP7,TP8
TP11
525kHz
(1kHz Mod.)
Adjust for maximum output
1650kHz
(1kHz Mod.)
Adjust for maximum output
TRACKING Fig.2
TP7,TP8
TP11
600kHz
(1kHz Mod.)
Adjust for maximum output
Adjustment Points
T102
T103
2 BAND
T105
PVC (C1)
3
L105(Bar antenna)
1400kHz
(1kHz Mod.)
PVC (C2) Adjust for maximum output
TP4
GND
2feet
(60cm)
AM IF Sweep Loop antenna Oscilloscope
SET
Fig. 2
TP7, TP8
TP11
2feet
(60cm)
Oscilloscope
SET
S.S.G.
(AM Signal)
V.T.V.M.
3
ADJUSTMENT
Fig. 3
FM Section
Step Adjustment Connection Test Points S.S.G. Frequency Remarks
1 IFT Fig.3
TP2,TP3
TP4,TP11
10.7MHz Adjust for maximum output
Fig.4
TP1,TP3
TP7,TP8
TP11
87.35MHz Adjust for maximum output
108.3MHz Adjust for maximum output
TRACKING Fig.4
TP1,TP3
TP7,TP8
TP11
90MHz Adjust for maximum output
Adjustment Points
T101
T104
2 BAND
L104
PVC (C4)
3
L102
106MHz PVC (C3) Adjust for maximum output
Fig. 4
OscilloscopeS.S.G.
(FM Signal)
3
TP7, TP8
TP11
Fig. 5
FM Signal Generator
75 ohm
Dummy Ant.
SET
∗FM:Carrier stereo modulation
10% pilot at 1mV RF level.
ANT.
GND.
TP7
TP11
TP1
V.T.V.M.
V.T.V.M.
Oscilloscope
Oscilloscope
TP8
TP11
MPX ST MOD.
Frequency Counter
IC102 Pin 6
220K
FM STEREO Section
Step Adjustment Connection Test Points S.S.G. Frequency Remarks
1 VCO Fig.5
IC102 Pin6
TP11
38kHz +/- 40Hz
Tune to signal
Check either one channel(R or L)
output in mimi. reading
Adjustment Points
VR101
2 SEPARATION Fig.5
TP1,TP7
TP8,TP11
Oscilloscope
100PF
SET
TP4
GND
GND
FM IF Sweep Generator
4
SW-1 Section
Fig 6
Step Adjustment Connection Test Points S.S.G. Frequency Remarks
1 BAND Fig.6
TP1,TP2
TP7,TP8,TP11
2.1MHz
(1kHz Mod.)
Adjust for maximum output
8.5MHz
(1kHz Mod.)
Adjust for maximum output
Adjustment Points
T106
CT101
TP1
TP2
V.T.V.M.S.S.G.
(SW Signal)
Dummy Ant.
75 ohm
SET
TP7, TP8
TP11
Oscilloscope
ADJUSTMENT
2 TRACKING Fig.6
TP1,TP2
TP7,TP8,TP11
3.0MHz
(1kHz Mod.)
L106(Bar antenna) Adjust for maximum output
SW-2 Section
Fig 6
Step Adjustment Connection Test Points S.S.G. Frequency Remarks
1 BAND Fig.6
TP1,TP2
TP7,TP8,TP11
7.85MHz
(1kHz Mod.)
Adjust for maximum output
24.4MHz
(1kHz Mod.)
Adjust for maximum output
Adjustment Points
T107
CT102
TP1
TP2
V.T.V.M.S.S.G.
(SW Signal)
Dummy Ant.
75 ohm
SET
TP7, TP8
TP11
Oscilloscope
2 TRACKING Fig.6
TP1,TP2
TP7,TP8,TP11
8.5MHz
(1kHz Mod.)
L107 Adjust for maximum output
5
ADJUSTMENT
MAIN PCB
BARANTENNA
L105 L106
6
ADJUSTMENT
TAPE DECK SECTION
MOTOR SPEED Adjustment
TAPE SPEED Adjustment
1. Insert 3kHz TEST TAPE TO deck adjusts VR of motor speed calibrator to obtain the closing frequency of
3kHz that display at the counter.
R/P Head Azimuth Adjustment
1. Set the function select switch to tape position.
2. Tune the volume control to max. output position.
3. Insert 6.3kHz or 8kHz Test into deck compartment .(TEAC MTT-113N or MTT-113CN)
4. Adjust the play back head mounting screw to obtain the max. output . Reading at VTVM.
7
EXPLODED VIEW (CABINET & CHASSIS) (1/2)
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