DOWNLOAD Panasonic SA-BTT270EB / SA-BTT270EE / SA-BTT270EG / SA-BTT270EP / SA-BTT270GN / SC-BTT270EEK Service Manual ↓ Size: 18.43 MB | Pages: 127 in PDF or view online for FREE

Model
SA-BTT270EB SA-BTT270EE SA-BTT270EG SA-BTT270EP SA-BTT270GN SC-BTT270EEK
Pages
127
Size
18.43 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio / BLU-RAY DISC HOME THEATER SOUND SYSTEM
File
sa-btt270eb-sa-btt270ee-sa-btt270eg-sa-btt270ep-sa.pdf
Date
PREV: Panasonic SA-BTT190EB / SA-BTT190EG / SA-BTT190EP / SA-BTT190GN / SA-BTT195EE / SA-BTT195EP / SC-BTT195EEK Service Manual

Panasonic SA-BTT270EB / SA-BTT270EE / SA-BTT270EG / SA-BTT270EP / SA-BTT270GN / SC-BTT270EEK Service Manual ▷ View online

45
8 Troubleshooting Guide
8.1.
Troubleshooting Guide for F61 and/or F76
Symptom(s)
Checking items
Possible Fault(s)
Remarks
Set cannot Power ON:
Condition 1: With 
Stanby LED on
1
2
3
1
2
3
Photocoupler PC5702,
PC5799
1
2
PC5702/PC5799 solder crack,
dry joint ,short circuit,open 
circuit,etc
Solder crack,dry joint ,short 
circuit,open circuit,etc
Switching IC IC5701
AC cord
AC Inlet P5701
1 Faulty AC cord, loose 
connection
2
2
Solder crack,dry joint ,short 
circuit,open circuit,etc
4
Check FFC connection/
alignment from SMPS (JW2) 
to Main (CN2004)
2
P5701 solder crack, dry joint 
etc
Faulty IC5701, pin 1 and 2 
shorted, VCC short to GND, etc
Faulty IC5799, pin 5 and 7 
shorted, VCC short to GND, etc
Switching IC IC5799
Set can Power ON 
then F61
Set can Power ON 
then F76
Set can Power ON 
working normally for 
sometime then F61
Condition 2: With 
Stanby LED Off or 
flickering
3
1
2
3
3 F1 Fuse open
Fuse F1
DC-DC circuit
1 Thermal Diode D5802
SMPS FFC loose
LDO regulator
4 Photocoupler PC5720
1 Transformer T5701
2 Photocoupler PC5720
1a Pin 11/12 shorted to pin 13/14
1b
1a
1b
Pin 16 shorted to pin 17
L2902 Open (no input to 
IC2901)
Faulty IC2901 (no output 
voltage at pin 10 and 11)
1a
1b
Improper contact between 
D5802 to heatsink
OTP (thermal) protection 
trigger prematurely
3a Faulty QR7071
   Transistor diode
check (cannot switch ON then
NO +9V)
3b LB2843 Open (+12V line going
to Panel PCB CN2002)
1c Faulty Q2902 and Q2903 
(regulator)
1d L2908 open (No DC +5V)
1e R7003 open (No DC +9V)
1) Refer to Fig. 1. SMPS P.C.B.
Refer to Fig. 1. SMPS P.C.B.
Refer to Fig. 1. SMPS P.C.B.
Refer to Fig. 1. SMPS P.C.B.
Refer to Schematic Diagram of
SMPS Circuit (Item 17.7) for 
terminal pin count on primary and 
secondary terminals
SMPS Circuit (Item 17.7)
2) Refer to Schematic Diagram of
1) Refer to Fig. 2. Digital P.C.B.
Digital (Power) Circuit (Item 17.2)
2) Refer to Schematic diagram of
1) Refer to Fig. 2. Digital P.C.B.
Digital (Power) Circuit (Item 17.2)
2) Refer to Schematic diagram of
46
8.1.1.
SMPS P.C.B.
Figure 1. SMPS P.C.B.
Photocouple:
PC5702, PC5799
Switching IC: IC5799
Switching IC: IC5701
Transformer: T5701
Photocouple: PC5720
Thermal Diode: D5802
47
8.1.2.
Digital P.C.B.
Fig 2. Digita P.C.B.
(Side B of Digital P.C.B.)
(Side A of Digital P.C.B.)
Transistor : QR7071
Transistor : Q2902
Transistor : Q2903
INTEGRATED CIRCUIT : IC2901
Inductor : LB2843
Inductor : L2908
Inductor : L2902
Resistor : R7003
Resistor : R2908
48
9 Service Fixture & Tools
9.1.
Service Tools and Equipment
Prepare service tools before process service position.
Ref. No
Service Tools
Remarks
SFT1
Digital P.C.B. (CN2002) - Panel P.C.B. (P6001)
RFKZBTT270K1 (13P FFC)
SFT2
Digital P.C.B. (CN2004) - SMPS P.C.B. (JW2)
RFKZBTT270K2 (10P FFC)
SFT3
Digital P.C.B. (CN2006) - D.Amp P.C.B. (CN5402)
RFKZBTT270K3 (18P FFC)
Page of 127
Display

Click on the first or last page to see other SA-BTT270EB / SA-BTT270EE / SA-BTT270EG / SA-BTT270EP / SA-BTT270GN / SC-BTT270EEK service manuals if exist.

RANDOM: