TABLE OF CONTENTS Specifications ................1 Flexible Circuit Board Repairing • Keep the temperature of the soldering iron around 270°C during 1. GENERAL repairing. Location and Function of Controls ........2 • Do not touch the soldering iron on the same conductor of the circuit board (within 3 times).
SECTION 2 DISASSEMBLY The equipment can be removed using the following procedure. Cover (JOG) (A) Lid, Battery Case Cabinet (Rear) Main Board Note : Follow the disassembly procedure in the numerical order given. 2-1. COVER (JOG) (A) 1 Screw (B1.7x9) Cover (JOG) (A) 3 Turn from upper side of the cover (JOG) (A),...
SECTION 3 ADJUSTMENTS • Repeat the procedures in each adjustment several times, and the TUNER SECTION 0dB = 1µ V frequency coverage and tracking adjustments should be finally done by the trimmer capacitors. AM Section AM IF ADJUSTMENT Band : AM Adjust for a maximum reading on level meter.
Page 6
FM VCO Adjustment Connect Location : Procedure : [MAIN BOARD] (SIDE A) C302 R203 FM RF signal C209 C208 generator C130 C133 0.01 µ F IC201 TP102 (RF IN) MAIN board frequency counter 1 µ F Carrier frequency : 98MHz R202 C205 IC201 4...
SECTION 4 DIAGRAMS 4-1. EXPLANATION OF IC TERMINALS IC502 µPD17073GB-925-9EU (SYSTEM CONTROL, LCD DRIVE) Pin No. Pin name Description — Not used (OPEN). EEPROM CS — Not used (OPEN). TV 4-12CH — Not used (OPEN). MUTE Audio mute signal output. —...
Page 8
Pin No. Pin name Description LCD5 Segment signal output for LCD. LCD6 Segment signal output for LCD. LCD7 Segment signal output for LCD. LCD8 Segment signal output for LCD. LCD9 Segment signal output for LCD. LCD10 Segment signal output for LCD. LCD11 Segment signal output for LCD.
4-4. SCHEMATIC DIAGRAM Refer to page 18 for IC Block Diagrams. SRF-T615 WAVEFORMS 1.7 Vp-p 75 kHz IC502 wk VOLT/DIV : 0.5 V AC X OUT TIME/DIV : 5 µsec 13.2 Vp-p 466 nsec VOLT/DIV : 2 V AC T601 TIME/DIV : 0.2 µsec...
SECTION 5 SECTION 6 MAIN EXPLODED VIEW ELECTRICAL PARTS LIST NOTE : NOTE : IC BLOCK DIAGRAMS • -XX, -X mean standardized parts, so they • The mechanical parts with no reference • Due to standardization, replacements in the • SEMICONDUCTORS When indicating parts by reference num- may have some difference from the original number in the exploded views are not...