Some illustrations using in this service manual are slightly different from the actual set.
AVR-3801
SAFETY PRECAUTIONS
The following check should be performed for the continued protection of the customer and service technician.
LEAKAGE CURRENT CHECK
Before returning the unit to the customer, make sure you make either (1) a leakage current check or (2) a line to chassis
resistance check. If the leakage current exceeds 0.5 milliamps, or if the resistance from chassis to either side of the
power cord is less than 460 kohms, the unit is defective.
* For purposes of improvement, specifications and design are subject to change without notice.
210W × 2ch (4Ω/ohms)
240W × 2ch (2Ω/ohms)
Surround:A or B 6 ~ 16Ω/ohms
Total harmonic distortion 0.008% (1 kHz, at 0 dB)
S/N ratio 102dB
Dynamic range 96dB
REC OUT)
C (color) signal 0.286Vp-p, 75Ω/ohms
CB (blue) signal 0.7Vp-p, 75Ω/ohms
CR (red) signal 0.7Vp-p, 75Ω/ohms
[FM] (note: µV at 75Ω/ohms, 0dBf=1 × 10
(for North America and multiple voltage models)(for North America and Multiple voltage models)
87.50MHz ~ 108.00MHz522kHz ~ 1611kHz
(for Europe, China, Hong Kong, Taiwan R.O.C. and Multiple voltage models)(for Europe, China, Hong Kong, Taiwan R.O.C. and multiple voltage models)
STEREO: 23µV (38.5dBf)
STEREO: 75dB
STEREO: 0.3%
AC230V, 50Hz (for Europe model)
AC220V, 50Hz (for China model)
AC115V/230V, 50/60Hz (for Hong Kong and Multiple voltage models)
400W (for Europe, China, Hong Kong and Multiple voltage models)
360W (for Taiwan R.O.C. model)
If wire bundles are untied or moved to perform adjustment or parts replacement etc.,be sure to rearrange them neatly as they
were originally bundled or placed afterward.
Otherwise, incorrect arrangement can be a cause of noise generation.
Wire arrangement viewed from the top
3
AVR-3801
DISASSEMBLY
(Follow the procedure below in reverse order when reassembling)
1. Top Cover
Remove 3 screws 1 on the rear and 6 screws 2 on both
sides to detach the Top Cover as shown in the arrow
direction.
Top Cover
1
2
2
2. Front Panel
(1) Remove 7 screws 3 from the top and bottom edges of
the Front Panel.
(2) Release 4 top and bottom hooks, then detach the Front
Panel as shown in the arrow direction.
3. Inner Panel
Pull out the Inner Panel in the arrow direction after removing
3 screws
.
4
Front Panel
Hook
Hook
3
3
Hook
3
4
Hook
4
Inner Panel
4
4. Inner Panel Ass'y
(1) Remove 3 round and 1 square knobs, and unscrew 4
nuts.
(2) Remove 15 screws
fixing each P.W.B.
5
AVR-3801
5
5
Before proceeding to the next stop, take off the Power
Transformer.
5. Power Transformer
(1) Remove 4 screws fixing the Power Transformer and 4
connectors.
(2) Be careful when removing the Power Transformer as it
is heavy.
Round Knob
Square Knob
Nut
Round Knob
5
Nut
5
AVR-3801
6. Component Video Unit / PRE-OUT Unit /
AMP Connect Unit
(1) Remove 9 screws 6 to detach Component Video Unit
and Pre-out Unit 8.
7
(2) Take off the Amp Connect Unit
arrow direction after removing 1 screw
as shown in the
9
.
10
10
9
8
7
6
7. Regulator Unit
Take off the Regulator Unit 11 as shown in the arrow
direction after removing 8 screws
(1) Remove 37 screws 13 to detach the Rear Panel.
(2) Take off the objective P.W.B. upward.
Rear Panel
AVR-3801
13
13
13
13
9. How to Check Power Amp /
µµ
µ-com Unit
µµ
with Power-on
(1) Remove 12 screws 14, 1 screw 15, and 4 screws
fixing to the Chassis.
16
(2) Pull up the Unit to separate from the Chassis.
14
15
14
14
16
14
16
14
7
AVR-3801
LEVEL DIAGRAMS
A
B
1
23
4
5
6
7
8
C
D
E
8
AVR-3801
1
2
3
4
5
76
8
A
B
C
D
E
9
AVR-3801
CLOCK FLOW & WAVE FORM IN DIGITAL BLOCK
Wave Form
1
CH1: D-DATA
(IC510 (5) )
2
CH1: DATA
CH2: fs
CH3: 64fs
3
CH1: DATA
10
CH2: fs
CH3: 64fs
CH4: 256fs
Step
Frequency
Input Level
Modulation
Connect to
1
Tuning Center
(JV36-JV67)
Function : FM
Mode : Auto
2
Separation
Stereo (L)
1KHz 100%
Terminal (R)
Separation
3
Signal Level
Step
Connect to
1
(Input level is not over to work A.G.C.)
Oscilloscope
IC502 12Pin
Maximum height and best
symmetry curve
ADJUSTMENTADJUSTMENT
Tuner SectionTuner Section
CONNECTION DIAGRAM OF MEASURING INSTRUMENTSCONNECTION DIAGRAM OF MEASURING INSTRUMENTS
''
FM FM
''
AVR-3801AVR-3801
AM AM
STEREO
MODULATOR
FMSSG
DIGITAL
VOLTMETER
FM/MPX ALIGNMENT
Alignment
Item
Frequency
98.1 MHzFM SSG98.1 MHz60 dBµNone
98.1 MHzFM SSG98.1 MHz60 dBµ
Tuning
Setting
75
Ω
Type
1U-3318-5 TUNER UNIT
VR502
TP102
InputOutputAdjust
IC502
1
T502
VR501
CouplingType
Antenna
Terminal
Antenna
Terminal
Digital
Voltmeter
AC
Voltmeter
TP102
AUDIO
OUT
PointsAdjust to
T502± 50mV
VR502
Maximum
OSCILLOSCOPE
AM IFOUT
Remarks
GND
AM
1U-3318-5 TUNER UNIT
T503
1
12
IC502
Pin
AM ALIGNMENT
Alignment
Item
IF
98.1 MHzFM SSG98.1 MHz20 dBµOff
FrequencyInput
IF SWEEP
Type
Antenna
Terminal
OutputAdjustment
VR501
PointsAdjust to
T503
Light
“TUNED”
FLD
Character
Remarks
1111
AVR-3801AVR-3801
Audio SectionAudio Section
Idling Current (1U-3315-1)Idling Current (1U-3315-1)
Required measurement equipment : DC VoltmeterRequired measurement equipment : DC Voltmeter
PreparationPreparation
(1)(1) Avoid direct blow from an air conditioner or an electric fan, and adjust the unit at normal room tempereture 15 °C ~ 30 °CAvoid direct blow from an air conditioner or an electric fan, and adjust the unit at normal room tempereture 15 °C ~ 30 °C
(59 °F ~ 86 °F).(59 °F ~ 86 °F).
(2)(2) PresettingPresetting
&& POWER (Power sourse switch)POWER (Power sourse switch)→→ OFFOFF
&& SPEAKER (Speaker terminal)SPEAKER (Speaker terminal)→→ No load (Do not connect speaker, dummy resistor, etc.)No load (Do not connect speaker, dummy resistor, etc.)
AdjustmentAdjustment
(1)(1) Remove top cover and set VR101, VR102, VR201, VR202, VR301, VR302, VR401, on 1U-3315-1 (Power Unit) at Remove top cover and set VR101, VR102, VR201, VR202, VR301, VR302, VR401, on 1U-3315-1 (Power Unit) at fullyfully
counterclockwise ( counterclockwise (
(2)(2) Connect DC Voltmeter to test points (FRONT-Lch: TP101, FRONT-Rch: TP102, CENTER ch: TP401, SURROUND-Lch:Connect DC Voltmeter to test points (FRONT-Lch: TP101, FRONT-Rch: TP102, CENTER ch: TP401, SURROUND-Lch:
(5)(5) Allow 2 minutes, and turn VR101 clockwise ( Allow 2 minutes, and turn VR101 clockwise (
) to adjust the TEST POINT voltage to 6.5 mV ) to adjust the TEST POINT voltage to 6.5 mV ±±0.5 mV DC.0.5 mV DC.
(6)(6) After 10 minutes from preset, turn VR101 to set the voltage to 8 mV After 10 minutes from preset, turn VR101 to set the voltage to 8 mV ±±0.5 mV DC.0.5 mV DC.
(7)(7) Adjust the Variable Resistors of other channels in the same way.Adjust the Variable Resistors of other channels in the same way.
(8)(8) After 5 minutes from (6), turn VR101 to set the voltage to 8 mV After 5 minutes from (6), turn VR101 to set the voltage to 8 mV ±±0.5 mV DC.0.5 mV DC.
(9)(9) Adjust the Variable Resistors of other channels in the same way.Adjust the Variable Resistors of other channels in the same way.
SBL ch
C ch
FL ch
SL ch
TP301
VR302
TP302
VR401
TP401
VR102
TP102
VR101
TP101
VR202
TP202
VR201
TP201
VR301
SBR ch
FR ch
DC Voltmeter
SR ch
1212
AVR-3801
SEMICONDUCTORS
!!
! IC’s
!!
Note: Abbreviation ahead of IC No. indicates the name of P.W.B.
PO: Power P.W.B.RE: Regulator P.W.B.
EX: Exit in P.W.B.AU: Audio/DSP P.W.B.
CO: Control P.W.B.AC: Amp Connect P.W.B
9 XinXinIXTAL
10 RESET_RESET_IEuLvL Reset input
11 P22/XTOUT TUNED_IEuLvZTuning detect, L: Tuned
12 P21/XTINSTEREO_IEuLvZ L: At stereo receive
13 TESTTESTI GNDSConnect to GND
14 P20/INT5_ B.DOWN_IEuLvZPower down detect, L: Power down
15 P10/INT0_ PROTECT_IEd E&LZ PROTECTION detect input, H: Detect
16 P11/INT1RDS STARTI ZLRDS data input (LC7074)
17 P12OSD CLKOC ZHOSD control output (M35015)
18 P13OSD CSOCZHOSD control output (M35015)
19 P14OSD DATAOC ZLOSD control output (M35015)
20 P15/INT3REMOCONIEd E&LZRemote control signal input
21 P16/INT2ACKOC ZLMAIN-SUB CPU comm. control terminal
22 P17/INT4REQIEuZLMAIN-SUB CPU comm. control terminal
23 P30/SCLSIIMAIN-SUB CPU comm. control terminal
24 P31/SDASOOCMAIN-SUB CPU comm. control terminal
25 P32/SCK0_ CLKOCMAIN-SUB CPU comm. control terminal
26 P40/AIN0MODEIEuLvZ Destination switching input
27 P41/AIN1KEY1IEuLvZ Button input 1
28 P42/AIN2KEY2IEuLvZ Button input 2
29 P43/AIN3KEY3IEuLvZ Button input 3
30 P44/AIN4FUNC STB1OCZL
31 P45/AIN5FUNC/T. CON CLKOC ZL
32 P46/AIN6FUNC/T. CON DATAOCZL
33 P47/AIN7E.VOL STB2OC ZLMulti Elect. volume control output (TC9459)
34 P50/AIN8E.VOL STB1OC LLElect. volume control output (TC9459)
35 P51/AIN9TONE STBOC LLTONE control output (TC9184P)
36 P52/AIN10 E.VOL DATAOC LHElect. volume control output (TC9459)
37 P53/AIN11 E.VOL CLKOC LHElect. volume control output (TC9459)
SymbolI/O Type OpDet ResInit
41
40
25
Function control output, REC OUT (TC9274-011), EXT/SOURCE (TC9274-012)
Function control output (TC9274N, TC9273), TONE control output (TC9184P)
Function control output (TC9274N, TC9273), TONE control output (TC9184P)
Pin
No.
Name
Symbol
I/O Type OpDet ResInit
Function
38 VASSVASSIRef. volt (GND)
39 VAREFVAREFIRef. volt (VDD)
40 VDDVDDIPower supply
41 P60FL CEOPEdSLHFL display control output (LC75721NE)
42 P61FL RESOPEdSLHFL display control output (LC75721NE)
43 P62FUNC STB2OPEdZLFunction control output (TC9273), INPUT (TC9273)
44 P63SA-RELAYOPIdLLSurround SP relay A control terminal, L: Mute
45 P64SB-RELAYOPIdLLSurround SP relay B control terminal, L: Mute
46 P65C-RELAYOPIdLLCenter SP relay control terminal, L: Mute
47 P66F-RELAYOPIdLHFront SP relay control terminal, L: Mute
48 P67PRE F MUTEOPEdLHFront PRE OUT mute control terminal, L: Mute
49 P70PRE C MUTEOPEdLLCenter PRE OUT mute control terminal, L: Mute
50 P71PRE S MUTEOPEdLLSurround PRE OUT mute control terminal, L: Mute
51 P72
SUB WOOFER MUTE
OPEdLHSub-woofer PRE OUT mute control terminal, L: Mute
52 P73H/P RELAYOPIdLHH/P OUT relay control terminal, L: Mute
53 P74EXP OEOPEdLHPort expander control terminal (BU4094)
54 P75EXP CLKOPEdLLPort expander control terminal (BU4094)
55 P76EXP DATAOPEdLLPort expander control terminal (BU4094)
56 P77EXP STBOPEdLLPort expander control terminal (BU4094)
57 P80POWEROPIdLHPower relay control output, H: ON
58 P81RESET2OPIdLLReset signal output to sub-CPU, H: Reset
59 P82PRE S.BACK MUTEOPIdLLSurround Back PRE PUT mute control terminal, L: Mute
60 P83S.BACK VOL MUTEOPIdLLSurround Back volume mute, L: Mute
61 P84STANDBYOPIdLHStandby LED drive output H: Light
62 P85S.BACK RELAYOPIdLLSurround Back SP relay control terminal, L: Mute
63 P86LED CKOPIdLLLED control terminal (BU2090F)
64 P87LED DATAOPI dLLLED control terminal (BU2090F)
65 P90TUNER MUTEOPEdLHTUNER mute control terminal, H: Mute
66 P91MULTI MUTEOPIdLHMULTI PREOUT mute control terminal, H: Mute
67 P92S MONI DETIEuLvZ S monitor connection detect input, L: Connected
68 P93S SIG DETIEuLvZ S signal detect input, H: Detected
69 P94SYNC DET.IEuLvZ Sync detect input, H: Ext. sync
70 P95SEL A (M)IEuLvZ Master volume rotation detect input (rotary encoder)
71 P96SEL B (M)IEuLvZ Master volume rotation detect input (rotary encoder)
72 P97CINEMA EQOPEuLvZLCINEMA EQ control output, H: ON
73 PD0VOL MUTEOPEdLLMaster volume minimum control, L: Min.
74 PD1SEL C (S)IEuLvZ Surround mode rotation detect input (rotary encoder)
75 PD2SEL D (S)IEuLvZ Surround mode rotation detect input (rotary encoder)
76 PD3SEL E (F)IEuLvZ
77 PD4SEL F (F)IEuLvZ
Pin No.: Terminal number of microcomputer.
Port Name: The name entered in the dat a sheet of microcomputer.
Symbol: Symbolized interface function.
I/O: Input or out of part.
Type: Composition of port in case of output port.
Op: Pull up/Pull down selection information.
Det: Indicates judging state of input port. Level detection is “LV”; Edge detection is “Ed”; Detection by both shifting is “E&L”;
Res: State at reset.
Ini: Initial output state.
Function: Function and logical level explanation of signals to be interface.
Serial data detection is “S” (Serial data output is also “S”).
“I”= Input port
“O”= Output port
“C”= CMOS output
“N”= NMOS open drain output
“P”= PMOS open drain output
“Iu”= Inner microcomputer pull up
“Id”= Inner microcomputer pull down
“Eu”= External microcomputer pull up
“Ed”= External microcomputer pull down
“H”= Outputs High Level at reset
“L”= Outputs Low Level at reset
“Z”= Becomes High impedance mode at reset
13
AVR-3801
TMP93CS41F (AU: IC301)
76
100
75
51
50
26
1
25
TMP93CS41F Terminal Function
Pin
No.
1V REFLA/D ref. GND
2A Vss←A/D GND
3A Vcc←AD +5V
4_NMIINot used (fixed to H)
5P70/TI0_DEMOD RESETOCEdLLDemodulator reset output (L: Reset)
6P71/TO1DEMOD ONOCEdLLDemodulator osc. control output (H: Osc.)
7P72/TO2FAN1OCEdLLFAN control output (H: ON, L: OFF)
8P73/TO3FAN2OCEdLLFAN control output (H: Hi, L: Low & off)
9P80/INT4/TI4B.DOWN_IEu E↓&LZ Power down detect (L: Detected)
10 P81/INT5/TI5DSP ACKIE↑&L Host I/F comm. response input (L: OK)
11 P82/TO4AC-3 RF DETIE↓&L AC-3 RF signal judge input (L: AC-3 data input)
12 P83/TO5_REQOCEuHL
13 P84/INT6/TI6_ACKIEu E↓&L MAIN-SUB CPU comm. control input (L: Ack. return from main)
14 P85/INT7/TI7ERRIE↑&L DIR control input terminal (LC89055Q)( H: ERR)
15 P86/TO6_DSP RESETOCEdLLDSP reset output terminal (L: Reset)
16 P97/INT0_CSIEd E↑&L
17 P90/TXD0SIOCMAIN-SUB CPU comm. control terminal (data output)
18 P91/RXD0SOIMAIN-SUB CPU comm. control terminal (data input)
19
20 P93/TXD1OC ZL
21 P94/RXD1DIR MISOILvDIR control input terminal (LC89055Q) control data input
22 P95/SCLK1DIR CLKOC ZLDIR control terminal (LC89055Q) control clock output
23 AM8/_16←Fixed to +5V
24 CLKOCEu
25 Vcc←+5V
26 VssI/O1GND
27 X1XinIX′tal connection
28 X2XoutOX′tal connection
29 _EA←Fixed to +5V
30 _RESETRESET2_IEuLvL Reset input (controlled by main CPU)
31 P96/XT1A/D RESETONEuHHA/D control terminal (L: Reset)
32 P97/XT2ASIC-RESETONEuHHASIC control terminal (L: Reset)
33 TEST1←IConnected to TEST2
34 TEST2←IConnected to TEST1
35 PA0DINAOCEdLLDigital input switching control output
36 PA1DINBOCEdLLDigital input switching control output
37 PA2DINCOCEdLLDigital input switching control output
38 PA3DINDOCEdLLDigital input switching control output
39 PA4DOUTAOCEdLLDigital output switching control output
40 PA5DOUTBOCEdLLDigital output switching control output
Name
P92/_CTS0/SCLK0
Symbol
CLKI/OCMAIN-SUB CPU comm. control terminal (I2C clock in/output)
I/O Type OpDet ResInit
MAIN-SUB CPU comm. control output (L: Comm. request from
sub)
DIR control input terminal (LC89055Q), when CH status change
L→H
Function
Pin
No.
41 PA6OCEdLL
42 PA7/SCOUT96k-DACOCEdLLDAC control terminal (H: Sample frequency 96kHz)
43 ALE←OC LLAddress latch enable
44 Vcc+5V
45 P00/AD0AD0I/OC ZLEPROM data in D0 / address out A0
46 P01/AD1AD1I/OC ZLEPROM data in D1 / address out A1
47 P02/AD2AD2I/OC ZLEPROM data in D2 / address out A2
48 P03/AD3AD3I/OC ZLEPROM data in D3 / address out A3
49 P04/AD4AD4I/OC ZLEPROM data in D4 / address out A4
50 P05/AD5AD5I/OC ZLEPROM data in D5 / address out A5
51 P06/AD6AD6I/OC ZLEPROM data in D6 / address out A6
52 P07/AD7AD7I/OC ZLEPROM data in D7 / address out A7
53 P10/AD8/A8A8OC ZLEPROM address out A8
54 P11/AD9/A9A9OC ZLEPROM address out A9
55 P12/AD10/A10A10OC ZLEPROM address out A10
56 P13/AD11/A11A11OC ZLEPROM address out A11
57 P14/AD12/A12A12OC ZLEPROM address out A12
58 P15/AD13/A13A13OC ZLEPROM address out A13
59 P16/AD14/A14A14OC ZLEPROM address out A14
60 P17/AD15/A15A15OC ZLEPROM address out A15
61 _WDTOUT←OC ZHWatch dog output
62 Vss←GND
63 Vcc←+5V
64 P20/A0/A16A16OC ZLEPROM address out A16
65 P21/A1/A17OC ZL
66 P22/A2/A18ADIRCEOC ZLDIR control terminal (LC89055Q) control chip enable output
67 P23/A3/A19DIR MOSIOCZLDIR control terminal (LC89055Q) control data output
68 P24/A4/A20OC ZL
69 P25/A5/A21FGAINOCEdLLFRONT ch GAIN switching control output (H: SW=NO)
70 P26/A6/A22DAC-RESETOCEdLL
71 P27/A7/A23SEL CKOC ZLADC/DIR data clock switching control terminal (L: ADC)
72 P30/_RD_RDOC ZLFlash memory control terminal
73 P31/_WR_WROC ZLFlash memory control terminal
74 P32/_HWRCSIILvDIR control input terminal (L: PCM)
75 P33/_WAITERR MUTE_OCEdLLPop noise preventive mute control output (L: Mute)
76 P34/_BUSRQ_DSP REQUESTOC ZL
77 P35/_BUSRQDIG.(AC39 MUTEOCEdZLDigital mute control output (L: AC-3 or DTS decode enable)
78 P36/_R/WWRITEOC ZLDSP comm. control terminal (H: Data write)
79 P37/_RASDIR RESETOC ZLDIR control output (LC89055Q) (L: Reset)
1 DISELIData input terminal (select input pin of DIN0, DIN1)
2 DOUTOInput bi-phase data through output terminal
3 DIN0IAmp built-in coaxial/optical input correspond data input terminal
4 DIN1IAmp built-in coaxial/optical input correspond data input terminal
5 DIN2IOptical input correspond data input terminal
6 DGNDDigital GND
7DVDDDigital power supply
8 RIVCO gain control input terminal
9 VINIVCO free-run frequency setting input terminal
10 LPFOPLL loop filter setting terminal
11 AVDDAnalog power supply
12 AGNDAnalog GND
13 CKOUTOClock output terminal (256fs, 384fs, 512fs, X′tal osc., VCO free-run osc.)
14 BCKO64fs clock output terminal
15 LRCKOfs clock output terminal (L: Rch, H: Lch, I2S: Reverse)
16 DATAOOData output terminal
17 XSTATEOInput data detecting result output terminal
18 DGNDDigital GND
19 DVDDDigital power supply
20 XMCKOX′tal osc. clock output terminal (24.576MHz or 12.288MHz)
21 XOUTOX′tal osc. connection output terminal
22 XINIX′tal osc. connection input terminal, external signal input possible (24.576MHz or 12.288MHz)
23 EMPHAOEmphasis information output terminal of channel status
24 AUDIOOBit1 output terminal of channel status
25 CSFLAGOTop 40bit revise flag output terminal of channel status
26 F0/P0/C0OInput fs cal. sig. out / data type out / input word inf. output terminal
27 F1/P1/C1OInput fs cal. sig. out / data type out / input word inf. output terminal
28 F2/P2/C2OInput fs cal. sig. out / data type out / input word inf. output terminal
29 VF/P3/C3OValidity flag out / data type out / input word inf. output terminal
30 DVDDDigital power supply
31 DGNDDigital GND
32 AUTOONon PCM burst data transfer detect sig. output terminal
33 BPSYNCONon PCM burst data preamble Pa, Pb, Pc, Pd sync sig. output terminal
34 ERROROPLL lock error, data error flag output terminal
35 DOOCPU I/F read data output terminal
36 DIICPU I/F write data input terminal
37 CEICPU I/F chip enable input terminal
38 CLICPU I/F clock input terminal
39 XSELIFrequency select input pin of XIN X′tal osc. (24.576MHz or 12.288MHz)
40 MODE0IMode setting input terminal
41 MODE1IMode setting input terminal
42 DGNDDigital GND
43 DVDDDigital power supply
44 DOSEL0IData output format select input terminal
45 DOSEL1IData output format select input terminal
46 CKSEL0IOutput clock select input terminal
47 CKSEL1IOutput clock select input terminal
48 XMODEIReset input terminal
* For latch-up countermeasure, set digital (DVDD) and analog (AVDD) power on/off in the same timing.
16
M35015-210SP (AC: IC308)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
OSC1
OSC2
CS
SCK
SIN
AC
V
DD2
CVIDEO
LECHA
CVIN
V
DD1
VERT*
HOR*
OSCIN
OSCOUT
P3
P2
P1
P0
Vss
CS
SCK
SIN
V
DD1
20
AC
Vss
V
DD2
P1
P0
CVIN
LECHA
CVIDEO
OSCOUT
OSCIN
HOR*VERT*OSC2OSC1
IN P U T
CONTROL
CIRCUIT
INDICATIO N
O S C ILLA TO R
DATA
CONTROL
CIRCUIT
ADDRESS
CONTROL
CIRCUIT
TIM ING
GENERATO R
INDICATIO N
CONTROL
REG ISTER
INDICATIO N RAM
INDICATIO N CHARACTER ROM
BLINKING CIRCUIT
SHIFT R EGISTER
INDICATIO N
CONTROL CIRCUIT
READ O UT ADDRESS
CONTROL CIRCUIT
IIND ICATION LOCATION
DETECTION CIRCUIT
H COUNTER
SYNC SIG NAL
SW ITCHING CIRCUIT
S Y N C S IG N A L D IS -
CRIM INATING CIRCUIT
OSC CIRCUIT
FOR SYNC SIG NAL
GENERATIO N
TIM ING
GENERATO R
NTSC
VIDEO OUTPUT
CIRCUIT
6
11
5
4
3
7
121918
17
16
8
9
10
12
13
P2
14
P3
15
AVR-3801
M35015-210SP Terminal Function
Pin No. SymbolNameI/OFunction
1OSC1Osc. circuit ext.IExternal terminal for indication oscillator circuit. Standard OSC. freq. is approx. 7MHz.
2OSC2terminal.OWith this OSC. freq., decides horizontal indicatin and character width.
3CSChip select inputI
4SCKSerial clock inputI
5SINSerial data inputI
6ACAuto-clear inputI
DD2
7V
8CVIDEO
9LECHA
10CVIN
Power supply
Combined
video output
Character level
input
Combined video
input
11VssGround
12P0Output port p0O
13P1Output port P1O
14P2Output port P2O
15P3Output port P3O
16OSCOUTOTerminal for external use of sync signal OSC. circuit. Use the freq.: 14.32MHz at NTSC
17OSCINIsystem, 17.73MHz at PAL. system, 14.30MHz at MPAL system.
18HOR*
19VERT*
20V
DD1
Ext. terminal
for sync sig.
OSC. Circuit
Horizontal sync
signal
Vertical sync
signal
Power supplyIPower supply terminal of digital system. Connect to +5V.
Chip select terminal and turns to “L” when transfer serial data.
Hysteresis input. Pull up resistor is built-in.
Takes in serial data of SIN at SCK rise when CS terminal is in “L”.
Hysteresis input. Pull up rersist is built-in.
Serial input of register for indication control and data, and address for indication data
memory. Hysteresis input. Pull up rersistor is built-in.
Resets internal circuit of IC at “L” mode.
Hysteresi input. Pull up resistor is built-in.
Power supply terminal of analog system. Connect to +5V.
Output terminal of combined video signal. Outputs 2Vp-p combined signal. Character
O
output, etc. Overlap CVIN signal and outputs at superimpose.
Input terminal deciding character output level in combined video signal. color of character
I
is white.
Input terminal of external combined video signal.
I
Character output etc. overlap this external combined video signal.
Ground terminal. Connect to GND.
General output or character background signal BL NK1* output is switchable.
Polarity can be selected at ROM mask.
General output or character background signal CO1* output is switchable.
Polarity can be selected at ROM mask.
General output or character background signal BLNK2* output is switchable.
Polarity can be selected at ROM mask.
General output or character background signal CO2* output is switchable.
Polarity can be selected at ROM mask.
Inputs horizontal sync signal.
I
Hysteresis input.
Input vertical sync signal. Hysteresis input. Polarity can be selected at ROM mask.
Q1DIRECTDIRECT relay control (H: DIRECT)
Q2S1Video signal switching control output
Q3S2Video signal switching control output
Q4SB/MULTI
Q5NC
Q6NC
Q7NC
Q8NC
SymbolFunction
S.BACK/MULTI switching control (H: MULTI (Power AMP Assignment))
Terminal Function
No.
NameFunction
I/O
1 AINRIRch analog input pin
2 AINLILch analog input pin
3 VREFO Ref. V out pin
4 VCOMO Common V out pin
5 AGND Analog GND pin
6VA Analog power pin, +2.7~+5.5V
7VD Digital power pin, +2.7~+5.5V
8 DGND Digital GND pin
9 SDTOO Serial data out pin, 2's complement, MSB first out, at power down: L
10 LRCKIL/R clock pin
11 MCLKIMaster clock input pin
12 SCLKISerial data clock input pin, A/D data out at SCLK falling edge
13 PDNIPower down pin, L: Power down mode
14 DIFISerial interface format pin (L: Firward, H: I2S)
15 TTLIDigital input level select pin, L: CMOS level, H: TTL level
16 TSTITest pin (inter nal pull-down)
TC9274N-011 (AU: IC107)
S1S2S3S4S5S6S7S8S9
41
V
DD
42
V
SS
1
234567891011 12 13 14
S1S2S3S4S5S6S7S8S9
36
38
37
3940
18
S10
S11
32
3435
18 bit Latch Circuit (Rch)
(Lch) Same as Rch
3031
33
S10
S11
TC9274N-012 (IC312)
S12
S13
S14
S15
S16
S17
2728
16
S15
25
17 18 19
S16
S17
24
23
STB
22
DATA
V
21
CK
L e v e l S h ift + S h ift R e g is te r C irc u it
20
GND
S18
29
15
S12
S13
S14
S18
26
S1S2S3S4S5S6S7S8S9
41
DD
42
V
SS
1
234567891011 121314
S1S2S3S4S5S6S7S8S9
36
38
37
3940
18 bit Latch Circuit (Rch)
S10
32
3435
33
(Lch) Same as Rch
S10
S11
S12
S13
S14
S15
S16
S17
S18
26
2728
16
S15
25
17 18 19
S16
S17
24
23
STB
22
DATA
21
CK
L e v e l S h ift + S h ift R e g is te r C irc u it