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TUNER ADJUSTMENTS
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 V 3-22pin(TP24,25) is 0.0 0.05V 3-22pin is 0.0 0.5V
2 Cover --- Connect Digital DC voltmeter to 87.5MHZ Low --- 1.4 0.05V
Voltage --- TP11(H), TP12(E). 108.0MHZ High --- 6.8 0.5V
2. MW
Step Adjusting Connection SG Set Adjustment Remark
Circuit Input Output Frequency Position
1
Connect Sweep generator to test 450kHz
point TP13(L)or TP14(R) and TP15(E). (at 999kHz)
2 Cover --- Connect Digital DC voltmeter to 522kHZ Low 1.00 0.05V
Voltage --- TP11(H )and TP12(E). 1611kHZ High 6.70 0.10V
3 Tracking
Connect AM SG to
Connect to VTVM 603KHZ Low L2151
Test loop Ant.
point TP13(L)or TP14(R) and TP15(E).
1404kHZ High CT252
3. LW
Step Adjusting Connection SG Set Adjustment Remark
Circuit Input Output Frequency Position
1 Cover --- Connect Digital DC voltmeter to 144kHZ Low L2154 1.00 0.05V
Voltage --- TP11(H) and TP12(E). 288kHZ High --- 5.42 0.10V
2 Tracking
Connect AM SG to
Connect to VTVM 162kHZ Low L2152
Test loop Ant.
point TP13(L)or TP14(R) and TP15(E).
279kHZ High CT251
IF(0V)
Adjustmen
Low XF233
AF Maximum
98MHz
AF Maximum
IF Low T2002 AF Maximum---
L2153
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
LW : 144 - 288kHz