Panasonic SA-BTT770EG / SA-BTT770EP / SA-BTT775EB / SA-BTT775EE / SA-BTT775GN / SC-BTT775EEK Service Manual ▷ View online
49
7.3.4.
Service Mode Table 4
6. Disc maker ID is displayed for 5
seconds.
seconds.
7. Factor of drive error (hexadeci-
mal) occurring is left displayed.
mal) occurring is left displayed.
In case that the maker cannot be
identified, display is blackout.
identified, display is blackout.
Item
FL display
Key operation
Mode name
Description
(Remote controller key)
50
7.3.5.
Service Mode Table 5
CEC (H) output
Check of the CEC terminal high output of
HDMI.
HDMI.
Press [5] [5] in service mode.
CEC (L) output
Check of the CEC terminal low output of
HDMI.
HDMI.
Press [5] [6] in service mode.
Item
FL display
Key operation
Mode name
Description
(Remote controller key)
CECLOK
CECHOK
CECLNG
NO DATA
CECHNG
Manufacturing Date
Read out the manufacturing date of the unit.
YY: Year
MM: Month
DD: Day
MM: Month
DD: Day
Press [6] [1] in service mode.
&&
8. When the last error doesn’t exist
51
7.3.6.
Service Mode Table 6
52
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
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
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)
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 17.8) for
terminal pin count on primary and
secondary terminals
SMPS Circuit (Item 17.8)
2) Refer to Schematic Diagram of
1) Refer to Fig. 2. Main P.C.B.
Digital(Micon)
Circuit (Item 17.2 / 3)
2) Refer to Schematic diagram of
1) Refer to Fig. 2. Main P.C.B.
Digital(Micon)
Circuit (Item 17.2 / 3)
2) Refer to Schematic diagram of
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