Panasonic SA-XH70PH, Руководство по обслуживанию

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10 Troubleshooting Guide
10.1. Troubleshooting Guide for F61 and/or F76
This section illustrates the checking procedures when upon detecting the error of “F61” and/or “F76” after power up of the unit. It is
for purpose of troubleshooting and checking in SMPS P.C.B..
Symptom(s)
Checking items
Possible Fault(s)
Remarks
Set cannot Power ON:
Condition 1: With
Standby LED on
1
2
1
Solder crack,dry joint ,short
circuit,open circuit,etc
AC cord
AC Inlet P5701
1 Faulty AC cord, loose
connection
2
2
Solder crack,dry joint ,short
circuit,open circuit,etc 2
P5701 solder crack, dry joint
etc
Faulty IC2900 (No +12V
output)
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
Standby LED Off or
flickering
3
1
3 F1 Fuse open Fuse F1
DC-DC circuit
1 Thermal Diode D5706
2 Photocoupler PC701
1 Transformer T5701
2 Photocoupler PC701
1a Pin 14/15 shorted to pin 12/13
1b Fan unit defective
1a Loose connection at CN100
(No +23V), check cable
connection between CN100 &
H2016.
1b No +6V voltage output at pin3,
IC106.
1d Q100 faulty (No +5V voltage
output at pin1,2,5 & 6).
1e Q107 & D114 faulty (No +9V
voltage).
1c L125 open circuit.
1a
1b
Improper contact between
D5706 to heatsink
OTP (thermal) protection
trigger prematurely
1f IC107 faulty (No +3.3V voltage
output at pin1).
1g K102, K105, K304 open circuit
(+3.3V line going to Panel
P.C.B. at CN203).
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 17.5) for
terminal pin count on primary and
secondary terminals
SMPS Circuit (Item 17.5)
2) Refer to Schematic Diagram of
1) Refer to Fig. 2. Main P.C.B.
Main Circuit (Item 17.3)
2) Refer to Schematic diagram of
1 Regulator IC IC2900