SERVICE MANUAL / !© 2003-11 PRINTED IN JAPANB51-8592-10 (N) 621VHF FM TRANSCEIVER / VHFTK-7108Panel assy(A62-0942-03)Front glass(B10-2753-03)Cabinet(A01-2178-02)Key top(K29-9065-01)Modular jack(E08-0877-05)GENERAL .................................................. 2SYSTEM SET-UP ...................................... 5OPERATING FEATURES .......................... 6REALIGNMENT ....................................... 13INSTALLATION ....................................... 19DISASSEMBLY FOR REPAIR ................. 23CIRCUIT DESCRIPTION .......................... 24SEMICONDUCTOR DATA ...................... 32COMPONENTS DESCRIPTION .............. 34PARTS LIST ............................................. 36EXPLODED VIEW .................................... 42CONTENTSREVISED / This service manual applies to products with 50800001 orsubsequent serial numbers.In terms of the products with the serial numbers earlierthan 50800001, refer to the TK-7108 service manual as perpart No. B51-8592-00 or B51-8636-00.PACKING ................................................. 43ADJUSTMENT ........................................ 45TERMINAL FUNCTION ........................... 52PC BOARDDISPLAY UNIT (X54-3460-20) ............ 54TX-RX UNIT (X57-6913-01) ................ 56SCHEMATIC DIAGRAM .......................... 60BLOCK DIAGRAM ................................... 64LEVEL DIAGRAM .................................... 66SPECIFICATION ...................................... 68 !"#$%RMUMMMMN !"#$%& RMUMMMMN= !"#$%&'()"*=_RNJURVOJMM_RNJUSPSJMMqhJTNMU !"