Service Manuals, User Guides, Schematic Diagrams or docs for : LG Audio ffh-216 f216adjust
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ADJUSTMENTS
This set has been aligned at the factory and normally will not require further adjustment. As a result, it is not
recommended that any attempt is made to modificate any circuit. If any parts are replaced or if anyone tampers
with the adjustment, realignment may be necessary.
ADJUSTMENT & TEST POINT
L21
(FM IF
ADJUSTMENT)
L140 VR298
(RECORD BIAS (MOTOR SPEED
ADJUSTMENT) ADJUSTMENT)
Figure 1. Main P.C. Board
-8-
TUNER ADJUSTMENT
Item Test Point Adjustment Adjust for
DC Voltage IC102 , pin L21 0V 50mV
Electronic
FM Antenna OSCILLOSCOPE
Terminal
Signal Generator
26 , 28 PIN
Unit
GND
Figure 2. Tuner(S curve) Adjustment Connection Diagram
TAPE DECK ADJUSTMENT
1. AZIMUTH ADJUSTMENT
Deck Mode Test Tape Test Point Adjustment Adjust for Remark
Speaker Forward:Righthand Side Screw
Playback MTT-114 Head Screw R/L Maximum
Terminal Reverse:Lefthand Side Screw
Electronic Dual-trace
Voltmeter synchroscope
Head Speaker
Playback Mode
Terminal
L out
L ch CH1 CH2
Test Tape Unit
MTT-114 R ch GND
R out
Figure 3. Azimuth Adjustment Connection Diagram
2. MOTOR SPEED ADJUSTMENT
Deck Mode Test Tape Test Point Adjustment Adjust for Remark
Speaker VR298 After adjusting in forward, confirm
Playback MTT-111 3kHz 45Hz
Terminal (MAIN PWB) the specification in reverse mode.
Head Speaker Terminal Frequency Counter
Playback Mode
L out
Test Tape
MTT-111 Unit
R out
Record/Playback GND
Head
Figure 4. Motor Speed Adjustment Connection Diagram
-9-
3. RECORD BIAS ADJUSTMENT
Deck Mode Test Tape Test Point Adjustment Adjust for
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