Panasonic SC-HTB70P, Service Manual, Page: 23 / 147

23
9 Troubleshooting Guide
䞉
How to reset (factory setup condition)
䠍䠊
Turn on the power of main set.
䠎䠊 Press and hold the power button for 5 seconds.
(Repeat the flashing of all LED twice)
3 䠊 Turn off the power.
䞉
The entering method of Service Mode
㻌
(after turn off the power, you can exit from Service Mode)
䠍䠊
Setting main set in power on status.
䠎䠊 Press the main set [Volume-] button, then continue press the [SUB -] & [SUB+] of remote control.
(All LEDs will blink four times, followed by all LEDs OFF)
SC-HTB70
Main set power ON Power do not turn on Power on by remote control ・ OK
Power on by remote control ・ NG
- Check the connection of FFC connector (Main PCB
-->LED PCB)
- Check the connection of Key Button wire (Key
Button PCB-->Main PCB)
- FFC & wire checking
- Switch operation checking
- LED display checking
(The input display LED not lit
）
Power input but turn off immediately
・ Check the 8P of [LED]-[Main] & 30P of [HDMI]-[Main] & each FFC connector.
・ Check the 6P of [Key Button]-[Main].
・ Check the 8P of [LED]-[Main] & 30P of [HDMI]-[Main] & each FFC connector, & 6P of Button wire.
・ The both end voltage of [Panel] power switch S6101 is press →0V, release →3.3V
- Check the connection of FFC connector & wire
- Checking the system 5V circuit
- Checking the AC inlet code
- Checking fuse cut
・ Check [LED] CN6001(1)→3.3V, CN6001(8)→6V & FFC connector of 8P connection.
・ [Switching power module] JW1(5 ） →3.8V to 5V 、 [Main] IC2202 （ 4)→3.6V to 3.8V
・ Check [Switching power module]-[ACinlet] wire & patterns 、 solder.
・ Check the continuity of [Switching power module] F1.
・
Check the IC overcurrent
・
overheating
・
failure of [Digital Amplifier] → [Digital Amplifier] exchange.
Fuse cut
LED display checking
After replacement, cut again at The primary side of main power supply
abnormal
Check the continuity of primary side power circuit
outlet connection
・
Short-open power transformer, electrolytic diode IC · [switching power module].
・
(D5701,C5712,IC5701,T5701)
After replacement, cut again at
power on
The secondary side of main power supply
abnormal
Check the continuity of secondary side power circuit ・ Short-open power-electrolytic IC diode [switching power module]
・ (D5802,C5805,IC5801)
Check the display by Service Mode Some not lighting ・ not light off Failure of drive IC ・ Failur of not lights up LED ・ [LED] IC6001(5,6,7,8,9,10,11,12,13,14,15,16)) LED ： ON→0V, OFF→3.3V
All not lighting Check drive IC ・ serial signal ・ FFC ・ [LED] IC6001(18)→3.3V
・ Check [LED] IC6001 （ 2,3,4 ） serial signal
Audio confirmation No audio output
（
OPT input
）
AUX input voice appear Check the OPT terminal and OPT cable
・
Check [AUX] JK3003(1)→3.3V, output (3) SPDIF waveform.
・ Check the [AUX]-[Main] 9P FFC & connector
No audio output
（
AUX input
）
OPT input voice appear Check the AUX terminal and AUX cable
・
Check [AUX] CN3001(7,8,9)
・ Check the [AUX]-[Main] 9P FFC & connector
No audio output (OPT & AUX input) Check output line to speaker Check speaker connector & cable
Parts & solderbility condition
・ Check[Main] CN5101, CN5100
・ Check [Main] : IC2000(86)
・ Check [Main] : IC2000(23,25)
・ Front Right Line :
- Check [Main] : C5313,C5327,C5310,C5308,C5312,C5315,C5311
- Check PWM waveform [Main] : Q5303(3), Q5304(3)
・ Front Left Line :
- Check [Main] : C5413,C5427,C5410,C5408,C5412,C5415,C5411
- Check PWM waveform [Main] : Q5403(3), Q5404(3)
・
Subwoofer Line :
- Check [Main] : C5513,C5527,C5510,C5508,C5512,C5515,C5511
- Check PWM waveform [Main] : Q5503(3), Q5504(3)
Check Input line which are going to AVNERA IC
Error contents F61
Error contents F76 Television LED flashing, power off
・ Check the each power (FAN,DAMP,+12V,+5.6,+3.3,+1.8V) Television & external 1 LED flashing, power off
Power input but LED error display
・
[Main] DSP & communication error of the microcomputer → [Main] board exchange.
・
[Main], IC of [Digital Amplifier] DAMP & communication error of the microcomputer → [Digital Amplifier] baord exchange.
・ [Main] IC of HDMI & communication error of the microcomputer → [Main] board.
Error contents U701/703/704
Error contents F70 DSP
Error contents F70 DAP
Error contents F70 HDMI
Television & external 1, dolby LED flashing
Television & external 1, dolby, DTS LED flashing
Television & external 1, dolby, DTS , AAC
LED flashing
・
Try once to "On / Off" the power of the connected device. Try to connect or disconnect the HDMI cable. External 1 LED only repeat flashing
Audio confirmation Sound skip from front speaker Check the radio wave interference of other wireless
equipment (cordless phone, microwave oven, WiFi,
other BT devices).
(Bluetooth input)
・ Place subwoofer & other wireless equipment more than 2 meters away from main unit
No sound from front speaker
(Bluetooth input)
BT LED blinks quickly then becomes steady
(PAIRING OK)
Check the connection to front speaker
Check BT module connection to main board
・ Check Main board (Micon/DSP & Digital Amplifier Circuit)--> Main board change
・
Check Main board CN2002(1) and IC2203(1)-->3.3V;
・ Check L2003 or R2029,R2030
・ Check LB2005 and LB2003
・ Check USB Switch circuit --> IC2003(10)-->+5V
If all above are OK, replace BT module
BT LED does not blink quickly/no change
(PAIRING FAILED)
OPT Input
AUX Input
Unable to view HTBx70 in list of BT devices
in external BT device
Bluetooth (BT)
Module