Service Manuals, User Guides, Schematic Diagrams or docs for : LG Audio ffh-170 f170adj
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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
(RECORD BIAS
ADJUSTMENT)
Figure 1. Main P.C. Board
-8-
TUNER ADJUSTMENT
Item Test Point Adjustment Adjust for
DC Voltage IC10 , 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. RECORD BIAS ADJUSTMENT
Deck Mode Test Tape Test Point Adjustment Adjust for
Rec/Pause MTT-5511 Erase Head Wire L140 83kHz◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo