Before servicing this unit, familiarize yourself with the following precautions:
1. Many electrical and mechanical parts in this
chassis have special safety characteristics that
often pass unnoticed and the protection
afforded by them cannot necessarily be
obtained by using replacement components
rated for higher voltage, wattage, etc.
Replacement parts that have these special
safety characteristics are identified in this
manual and its supplements: electrical
components having such features are identified
by in the schematic diagram and the parts
list.
Before replacing any of these components,
read the parts list in this manual carefully. The
use of substitute replacement parts that do not
have the same safety characteristics as
specified in the parts list may create shock, fire,
or other hazards.
2. Before returning the set to the customer,
always do an AC leakage current check on the
exposed metal parts of the cabinet, such as
terminals, screw heads, and metal overlays, to
be sure the set is safe to operate danger of
electrical shock. Plug the AC line cord directly
into a 120 V AC outlet(USA Version) or 230 V
AC outlet(EU Version). (Do not use a line
isolation transformer during this check.) Be sure
your AC voltmeter has a sensitivity of 5000 Ω
per volt or greater. Then connect a 1500 Ω 10
watt resistor, paralleled by a 0.15 µF 150 V AC
capacitor, between a known good earth
ground(such as a water pipe, or conduit) and the
exposed metallic parts, one at a time. Measure
the AC voltage across the combination of a 1500
Ω resistor and a 0.15 µF capacitor. Reverse the
AC plug at the AC outlet and repeat AC voltage
measurements for each exposed metalic part.
Voltage measured must not exceed 0.75 V
RMS. This corresponds to 0.2 mA AC. Any
value exceeding this limit constitutes a potential
shock hazard and must be corrected
immediately.
Notes 1. Available only in the μPD78F0536, 78F0537, and 78F0537D.
2. Available only in the μPD78F0534, 78F0535, 78F0536, 78F0537, and 78F0537D.
3. Available only in the μPD78F0537D.
Note2
Note2
Note1
Note2
Note2
Note3
8
INTERRUPT
CONTROL
2
4
PORT 0
7
P00 to P06
PORT 1
8
P10 to P17
PORT 2
8
P20 to P27
PORT 3
4
P30 to P33
PORT 4
4
P40 to P43
PORT 5
4
P50 to P53
PORT 6
4
P60 to P63
PORT 7
8
P70 to P77
PORT 12
5
P120 to P124
PORT 13
P130
PORT 14
2
P140, P141
BUZZER OUTPUT
BUZ/P141
CLOCK OUTPUT
CONTROL
PCL/P140
KEY RETURN
8
KR0/P70 to
KR7/P77
RESET CONTROL
MULTIPLIER &
DIVIDER
ON-CHIP DEBUG
SYSTEM
CONTROL
INTERNAL
HIGH-SPEED
OSCILLATOR
VOLT AGE
REGULATOR
POWER ON CLEAR/
LOW VOLTAGE
INDICATOR
EXLVI/P120
RESET
REGC
X1/P121
X2/EXCLK/P122
XT1/P123
XT2/EXCLKS/P124
POC/LVI
CONTROL
FLASH
MEMORY
INTERNAL
HIGH-SPEED
RAM
INTERNAL
EXPANSION
RAM
VDD,
EV
DD
VSS,
EV
SS
FLMD0
OCD0A
Note 3
/X1, OCD1A
Note 3
/P31
OCD0B
Note 3
/X2, OCD1A
Note 3
/P32
SI11
Note 2
/P03
SO11
Note 2
/P02
SCK11
Note 2
/P04
SSI11
Note 2
/P05
EXSCL0/P62
SDA0/P61
SCL0/P60
ANI0/P20 to
ANI7/P27
AV
REF
AVSS
RxD6/P14 (LINSEL)
INTP0/P120 (LINSEL)
INTP1/P30 to
INTP4/P33
INTP5/P16
INTP6/P140,
INTP7/P141
2. Block Diagram
3. Pin Functions
No.Pin NamePin SymbolI/OPin Description
1P120/INTP0/EXLVIPROTECTIONIInput for protection
2P43VOL_UPIInput for volume up
3P42VOL_DNIInput for volume down
4P41H/P_RLYOOutput for headphone relay
5P40C_RLYOOutput for center speaker relay
6RESETRESETIInput for u-com reset
7P124/XT2/EXCLKSS_RLYOOutput for surround speaker relay
8P123/XT1F_RLYOOutput for front speaker relay
9IC/FLMD0FLMD0OPort for flash mode setting
10P122/X2/EXCLKV1 OUT_MUTEOOutput for VIDEO1 OUT MUTE
11P121/X1TRIG CONTROLOOutput for DC TRIGGER ON/OFF
12REGCConnect to ground via 0.47uF/50V E.Cap
13VSSVSSGround
14EVSSEVSSGround
15VDDVDD3V3
16EVDDEVDD3V3
17P60/SCLOVIDEO_MUTEOOutput for video mute
18P61/SDA0VIDEO_S1/HDMI_S2OOutput for video/HDMI function IC switching
19P62/EXSCL0VIDEO_S2/HDMI_S1OOutput for video/HDMI function IC switching
20P63TUNEDIInput for tuner "TUNED" condition (L is active)
21P33/TI51/TO51/INTP4RDS_CLKIClock signal input from tuner pack
22P77/KR7RDS_DATAIInput for RDS data from tuner pack
23P76/KR6PLL_CEOChip select output for tuner pack
24P75/KR5PLL_DOOData output for tuner pack
25P74/KR4SW_MUTEOOutput for subwoofer channel mute
26P73/KR3C_MUTEOOutput for center channel mute
27P72/KR2S_MUTEOOutput for surround channel mute
28P71/KR1F_MUTEOOutput for front channel mute
29P70/KR0USB_PCOOutput for IC108(REGULATOR) ON/OFF
30P06/TI011/TO01R2A1521FP_CLKOClock signal output for R2A1521FP
31P05/TI001/SSI11R2A1521FP_DATAOOutput for R2A1521FP control data
32P32/INTP3P32Port for flash upgrade
33P31/INTP2P31Port for flash upgrade
34P50DSP/DIR_CCLKOClock signal output for DIR/DSP
35P51DSP/DIR_CDINI/OInput & output for DIR/DSP control data
36P52DSP_RESETOOutput for DSP reset
37P53DSP_RDYIInput for DSP enable
38P30/INTP1DSP_CEOChip select output for NJW1153
39P17/TI50/TO05DSP_ABOOTOOuput for DSP Auto boot
40P16/TOH1/INTP5DSP_INTREQIInterrupt signal output to DSP
41P15/TOH0DIR_PDNOOutput for DIR power down
42P14/RXD6RxDIInput for flash upgrade
43P13/TXD6TxDOOutput for flash upgrade
44P12/SO10Front B RLYOOutput for SPK B ON/OFF
45P11/SI10/RXD024C08_SCLKOClock signal output for 24C08
46P10/SCK10/TXD024C08_SDAI/OInput & output for 24C08 control data
47AVREFAVREF3V3
48AVSSAVSSGROUND
49P27/ANI7KEY2IInput for KEY2 scan
50P26/ANI6KEY3IInput for KEY3 scan
51P25/ANI5KEY1IInput for KEY1 scan
52P24/ANI4BT/THERMAL_DETIBLUETOOTH DETECT
53P23/ANI3HDMI_HPDOOuput for HDMI HPD(NOT USED)
54P22/ANI2HDMI_S2OOuput for HDMI S2 CONTROL(NOT USED)
55P21/ANI1HDMI_S2OOuput for HDMI S1 CONTROL(NOT USED)
56P20/ANI0FUNC_DNIInput for function encoder down
57P130ST/BY_LEDOOuput for standby led
58P04/SCK11ST/BY_RLYOOnput for standby relay
59P03/S111FUNC_UPIInput for function encoder up
60P02/S011FLT/PLL_DATAOOutput for FLT/PLL control data
61P01/TI010/TO00FLT/PLL_CLKOClock signal output for FLT/PLL
62P00/TI000RMCIInput for remocon data
63P141/BUZ/INTP7FLT_CEOChip select output for FLT
64P140/PCL/INTP6POWER_DOWNIInput for power down