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TUNER & AMPLIFIER SECTION
TUNER ADJUSTMENTS
Standatd Input: 60dB
Antenna : 75 unbalanced , Modulation : 1 kHz
Dev. : ±22.5kHz(MONO) 22.5kHz(STEREO) ±6.75kHz(PILOT)
SG Modulation : 1kHz, 30%
Antenna, IRE Loop, Distance : 60 cm
• Use a plastic screw driver for adjustments.
• MODE : ST (Stereo)
• Speaker impedance : 4 ohm
• TUNING
FM : 87.5 - 108MHz
MW: 522 - 1611kHz
1. FM
Step Adjusting Connection SG Set Adjustment Remark
Circuit Input Output Frequency Position
1
98.0MHz.Input Level Alignment voltage IC231 Alignment voltage IC231
FM Antenna SG=66dB µ V 3-22pin(TP24,25) is 0.0 ± 0.05V 3-22pin is 0.0 ± 0.05V
2 Cover --- Connect Digital DC voltmeter to 87.5MHZ Low --- more than 0.8V
Voltage --- TP11(H), TP12(E). 108.0MHZ High --- less than 9.0V
2. MW
Step Adjusting Connection SG Set Adjustment Remark
Circuit Input Output Frequency Position
1 Cover --- Connect Digital DC voltmeter to 522kHZ Low more than 0.8V
Voltage --- TP11(H )and TP12(E). 1611kHZ High less than 9.0V
2 Tracking
Connect AM SG to
Connect to VTVM 603KHZ Low L2151-a
Test loop Ant.
point TP13(L)or TP14(R) and TP15(E).
1404kHZ High
IF(0V)
Adjustment
Low XF233
AF Maximum
98MHz
L2153
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