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HP 9800 DISPLAY BOARD TOP VIEW, DISPLAY BOARD BOTTOM VIEW

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41	48	49	57
CR4			OPT SW S2
A
C
		A401
OPT SW S1			OPT SW S3

OPT SW S4

OPT SW S5

DISPLAY BOARD TOP VIEW

DS1

C8	C1	R26			R20		R41		R4
		R27
C4	R44	R25	R39	R40					J1
			R39	R40


		51		C	1		B
					1
				Q3	E
				Q3	E			R29	R18
			R30	B	E		C	R29	R18
							Q2
				R10		14
				C3		14
				C3

R7	R21
R7
	1

	R37
R6	R38

R31		R33
R31		C
		C
R11		Q4
R11		B	E
R12		R34
R32	B	Q5	C
	B
	E

DS2

DS4

	U1					R47				DS2
	U1				U2	R47	4
					U2		4		3	C7
		U3				R48	5	U4	1	C7
100	31	15				28		C6		C5
								C6
	1	R14	R15	R17	R16	R45
	1					R13
						R13

DS3

R24	E B	R42
		R42
R23	Q6	R43	R50	R49
	C		E	B
			E	B
R35	R46	R36	Q7
R35		R36

				C

DISPLAY BOARD BOTTOM VIEW

	February 2001
6-5	Part No. 001-9800-001

Contents

25 or 40 Watts (UHF); 15 or 30 Watts (800/900 MHz) 13.6 VDC Part No 13.6 VDC 25 or 40 Watts, UHF 15 or 30 Watts, 800/900 MHz Part No. 242-984x-2xx(UHF) Part No. 242-988x-2xx(800 MHz) TABLE OF CONTENTS 1 GENERAL INFORMATION 3 CIRCUIT DESCRIPTION 2 INSTALLATION TABLE OF CONTENTS (CONT’D) 4 SERVICING 5 PARTS LIST 6SCHEMATIC DIAGRAMS AND COMPONENT LAYOUTS LIST OF TABLES LIST OF FIGURES SECTION 1 GENERAL INFORMATION 1.3 PART NUMBER BREAKDOWN Table 1-1Part Number Breakdown 1.4 TRANSCEIVER IDENTIFICATION Table 1-2Identification Number Breakdown Type 1.5 ACCESSORIES Table 1-398xx Accessories Accessory Cable Data/Accessory Cable Desktop Accessories 1.6 PRODUCT WARRANTY 1.7 FACTORY CUSTOMER SERVICE 1.8 FACTORY RETURNS 1.9 REPLACEMENT PARTS 1.10 INTERNET HOME PAGE UHF 984x SPECIFICATIONS 800 MHz 988x SPECIFICATIONS 900 MHz 989x SPECIFICATIONS SECTION 2 INSTALLATION 2.2 MOUNTING THE TRANSCEIVER WARNING Item Figure 2-2Remote Mount Installation Components 2.3 POWER CABLE INSTALLATION Figure 2-3Accessory Cable Installation 2.4 ACCESSORY CABLE INSTALLATION Function Figure 2-4Accessory Cable Connector Figure 2-5R170 Location Diagram Sw Bat Out (pin 2) Horn Alert (pin 4) - See Section Ignition Sense (pin 6) - See Section Output D (pin 7) 2.5 REMOTE CONTROL UNIT INSTALLATION Figure 2-6Data Cable Installation (-001Cable Shown) 2.6 USING AN EXTERNAL SPEAKER 2.7 DATA CABLE INSTALLATION CAUTION Table 2-1Data Cable Wire Chart J301 Pin No Wire Color 2.8 KEY CAP KITS EMER F1 F2 F3 SCAN SCAN BKLHT MSG HORN SECTION 3 CIRCUIT DESCRIPTION POWER DISTRIBUTION (ALL MODELS) 3.2 POWER DISTRIBUTION AND SWITCHING Figure 3-1Power Distribution and Switching Figure 3-2Power On-OffControl Circuit AUDIO/LOGIC DESCRIPTION (ALL MODELS) 3.3 AUDIO/LOGIC BOARD DIGITAL CIRCUIT VRH/VRL PE0 PE1 PE2 PE3 PA0 PA1 PA2 PA3 PA4/PA5 3.4 RECEIVE AUDIO/DATA PROCESSING Figure 3-3Audio and Data Processing Circuitry Block Diagram 3.5 TRANSMIT AUDIO/DATA PROCESSING 3.6 DISPLAY BOARD DISPLAY DESCRIPTION 3.7SYNTHESIZER CIRCUIT DESCRIPTION (UHF MODELS) UHF SYNTHESIZER DESCRIPTION 4-3Figure Diagram Block RF Models) (UHF DESCRIPTION SYNTHESIZER UHF DESCRIPTION CIRCUIT Page Page Figure 3-5Synthesizer Chip U804 Block Diagram 3.8RECEIVER CIRCUIT DESCRIPTION (UHF MODELS) UHF RECEIVER DESCRIPTION Figure 3-6Limiter/Detector U201 Block Diagram UHF TRANSMITTER DESCRIPTION 3.9TRANSMITTER CIRCUIT DESCRIPTION (UHF MODELS) Page Page 800/900 MHz SYNTHESIZER DESCRIPTION 3.10SYNTHESIZER CIRCUIT DESCRIPTION (800/900 MHz MODELS) 7-3Figure Models) MHz (800/900 DESCRIPTION SYNTHESIZER MHz 800/900 Normal Mode Talk-AroundMode Page Page Page 800/900 MHz RECEIVER DESCRIPTION 800/900 MHz TRANSMITTER DESCRIPTION 3.12TRANSMITTER CIRCUIT DESCRIPTION (800/900 MHz MODELS) Page Page Page SECTION 4 SERVICING American EIA Standard Japanese EIA Standard (pF) Color Multi Figure 4-1Simplified Synthesizer Block Diagram 4.3 SYNTHESIZER TROUBLESHOOTING Table 4-2SMD Inductor Identification Mode Supply Voltage Output Level Control Voltage VCO RF In (pin 6) Overall Div No. (K) = VCO freq ÷ “A” Divide No “N” Divide No Fractional-NDiv No. = (Fraction K) x 4.4RECEIVER SERVICING SECTION 5 PARTS LIST FRONT PANEL ASSEMBLY AND MECHANICAL PARTS FRONT PANEL ASSEMBLY AND MECHANICAL PARTS (CONT’D) UHF RF AND PA BOARDS UHF RF AND PA BOARDS (CONT ’D) Page Page Page Page Page Page Page Page Page Page Page Page Page 800/900 MHZ RF AND PA BOARDS 800/900 MHz RF AND PA BOARDS (CONT ’D) Page Page Page Page Page AUDIO/LOGIC BOARD (ALL MODELS) AUDIO/LOGIC BOARD (CONT’D) Page Page Page 9800-SERIESRADIO MOUNTING KIT 9800-SERIESREMOTE MOUNTING KIT DC POWER CABLE AND HARDWARE KIT PART NO. 023-9800-410(10 Ft) PART NO. 023-9800-422(22 Ft) FRONT PANEL EXPLODED VIEW FRONT AND TOP MECHANICAL PARTS BOTTOM MECHANICAL PARTS REMOTE TRANSCEIVER MECHANICAL PARTS REMOTE CONTROL UNIT MECHANICAL PARTS SECTION 6 SCHEMATIC DIAGRAMS AND COMPONENT LAYOUTS TRANSISTOR AND DIODE BASING DIAGRAMS Page Page CAUTION: INTERFACE BOARD LAYOUT INTERCONNECT SCHEMATIC DISPLAY BOARD TOP VIEW DISPLAY BOARD BOTTOM VIEW PROGRAMMING CABLE (P.N. 597-2002-200) RPI (P.N. 023-9800-000)BOARD LAYOUT RPI (P.N. 023-9800-000)SCHEMATIC RF BOARD COMPONENT LOCATOR GUIDE (UHF) UHF RF BOARD COMPONENT LOCATOR GUIDE (CONT’D) ’D) RF BOARD COMPONENT LOCATOR GUIDE (800/900 MHZ) Page Page Page Page RF BOARD SCHEMATIC (REVISED 430-470MHZ) PA BOARD SCHEMATIC (25W, 430-470MHZ)

C8	C1	R26			R20		R41		R4
		R27
C4	R44	R25	R39	R40					J1
			R39	R40


		51		C	1		B
					1
				Q3	E
				Q3	E			R29	R18
			R30	B	E		C	R29	R18
							Q2
				R10		14
				C3		14
				C3

	U1					R47				DS2
	U1				U2	R47	4
					U2		4		3	C7
		U3				R48	5	U4	1	C7
100	31	15				28		C6		C5
								C6
	1	R14	R15	R17	R16	R45
	1					R13
						R13

C8	C1	R26			R20		R41		R4
		R27
C4	R44	R25	R39	R40					J1
			R39	R40


		51		C	1		B
					1
				Q3	E
				Q3	E			R29	R18
			R30	B	E		C	R29	R18
							Q2
				R10		14
				C3		14
				C3

	U1					R47				DS2
	U1				U2	R47	4
					U2		4		3	C7
		U3				R48	5	U4	1	C7
100	31	15				28		C6		C5
								C6
	1	R14	R15	R17	R16	R45
	1					R13
						R13

C8	C1	R26			R20		R41		R4
		R27
C4	R44	R25	R39	R40					J1
			R39	R40


		51		C	1		B
					1
				Q3	E
				Q3	E			R29	R18
			R30	B	E		C	R29	R18
							Q2
				R10		14
				C3		14
				C3

	U1					R47				DS2
	U1				U2	R47	4
					U2		4		3	C7
		U3				R48	5	U4	1	C7
100	31	15				28		C6		C5
								C6
	1	R14	R15	R17	R16	R45
	1					R13
						R13