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M87_ATEX.pdf The service manual for IC-M87 (ATEX version) including all service information in this CD. This fi le is mainly used for viewing on the computer display and checking page order to make printed service manual. Or when you want to fi nd a component, you can fi...
SECTION 3 DISASSEMBLY INSTRUCTIONS 1. Removing the chassis panel q Remove a nut A. w Unscrew 2 screws B (2 × 8 mm, black) and 3 screws C (2 × 4 mm, black) from the chassis. e Take off the chassis in the direction of the arrow. NOTE: * Tighten the screws in order of a number (q–y) when assembling.
SECTION 4 CIRCUIT DESCRIPTION 4-1 RECEIVER CIRCUITS 4-1-3 1ST MIXER AND 1ST IF CIRCUITS (MAIN UNIT) 4-1-1 ANTENNA SWITCHING CIRCUIT (MAIN UNIT) The 1st mixer circuit converts the received signal into the The antenna switching circuit functions as a low-pass fi lter fi...
The 2nd IF signal from the 2nd mixer section (IC231, pin 3) 4-2 TRANSMITTER CIRCUITS passes through the ceramic fi lter (Wide: FI231 only, Narrow: 4-2-1 MICROPHONE AMPLIFIER CIRCUIT both FI231 and FI232) to remove unwanted heterodyned fre- (LOGIC UNIT) quencies.
4-3 PLL CIRCUITS The amplified signal is passed through the low-pass filter 4-3-1 PLL CIRCUIT (MAIN UNIT) (L121, L122, C121, C122), power detector (D121), antenna A PLL circuit provides stable oscillation of the transmit fre- switching circuit (D131) and another low-pass filter (L131, quency and receive 1st LO frequency.
4-3-2 VCO CIRCUITS (MAIN UNIT) 4-5 PORT ALLOCATIONS The VCO circuits contain a separate RX VCO (Q41, D31– 4-5-1 CPU (LOGIC UNIT; IC166) D34) and TX VCO (Q51, D35–D38). The oscillated signal is Port amplifi ed at the buffer amplifi ers (Q61, Q62) and is then ap- Description number name...
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4-5-2 EXPANDER (MAIN UNIT; IC341) CPU (continued) Port Port Description Description number name number name Outputs the internal speaker control Outputs the scrambler switch (IC281, signal. pin 3) control signal. SRXMS ISPMS Low : While the scrambler function High : While connecting the external OFF.
SECTION 5 ADJUSTMENT PROCEDURES 5-1 PREPARATION When adjusting IC-M87, JIG cable (see illustration on page 5-2), RS-232C cable and optional CS-M88 ADJ ADJUSTMENT are required. (Rev. 1.0 or later) SOFTWARE M REQUIRED TEST EQUIPMENT EQUIPMENT GRADE AND RANGE EQUIPMENT GRADE AND RANGE Output voltage : 7.2 V DC...
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• CONNECTION Standard signal generator to the antenna connector 0.1 µV to 32 mV (–127 dBm to –17 dBm) Attenuator deviation meter 20 dB or 30 dB CAUTION! DO NOT transmit while RF power meter 0.1–10 W/50 Ω SSG is connected to the antenna connector.
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• SCREEN DISPLAY EXAMPLE CS-M88 ADJ Rev.1.0 File Option COM 1: OPEN Connect Reload (F5) Disp para [A / D] [D / A] BATT : 120 : 78h : 7.53 V FRQCON : 127 : 7Fh : 2.49 V NOIS 59 : 3Bh : 1.16 V T1/POW : 92 : 5Ch :...
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5-2 SOFTWARE ADJUSTMENTS • Select the adjustment item with [↑] / [↓] keys, then set specifi ed value or condition with [←] / [→] keys on the connected com- puter keyboard. MEASUREMENT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION P L L L O C K 1 •...
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• MAIN UNIT TOP VIEW PLL lock voltage check point 5 - 5...
SOFTWARE ADJUSTMENTS (Continue) • Select the adjustment item with [↑] / [↓] keys, then set specifi ed value or condition with [←] / [→] keys on the connected com- puter keyboard. MEASUREMENT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION NOTE: Adjust all the adjustment items as follows throughly in sequence. Side •...
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CONTACT SPRING ASSEMBLY INSTRUCTION [1] PREPARING TWO SHORT LEADS q Cut the W1 (CHASSIS). w Bend the leads according to the dimensions below. 4.0–4.5 mm W1(CHASSIS) 3.5–4.0 mm [2] SOLDERING SHORT LEADS w Solder the short leads. q Cut off the area as below.
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• BC-152 CHARGER PARTS LIST ELECTRICAL PARTS ACCESSORY PARTS ORDER NO. DESCRIPTION ORDER NO. DESCRIPTION LOCATION LOCATION REF. NO. ORDER NO. DESCRIPTION QTY. 1180000970 S.IC AN78L05M-(E1) 48.2/58.9 6510024940 CNR HEC2305-016250 Screw.5 × 30 SUS 8810001470 1190001180 S.IC MM1332BFBE 23.7/24.6 DS1 5040003020 LED SEL2410G 1110005961 S.IC S-80833CNMC-B8S-T2G...
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SECTION 9 BOARD LAYOUTS The combination of this page and the next page shows the unit layout in the same configuration as the actual 9-1 MAIN UNIT P.C. Board. • TOP VIEW �� ����� ���� ���� �� ��� ��� �� �� ���� �����...
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MAIN UNIT The combination of this page and the previous page • BOTTOM VIEW shows the unit layout in the same configuration as the actual P.C. Board. �� �� �� �� �� �� �� � � �� �� �� �� ��...
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9-2 LOGIC UNIT The combination of this page and next page shows the unit layout in the same configuration as the actual P.C. • TOP VIEW Board. Horizontal 9 - 3...
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