Panasonic gp9de thxxpx60, thxxpx600 service guide Service Manual
Panasonic
16/03/2007
1
THxxPX60, THxxPX600, GP9DE CHASSIS
SERVICE GUIDE
OVERVIEW OF BOOT UP SEQUENCE FOR PSU:
5-1. Power Supply Overview (1/2)
<Block Diagram>
PFC
Circuit
AC Plug
Power
MCU
Power
MCU
P
STB_5V
Relay
ON/OFF
Relay
D
DG
Standby
Power
Circuit
12V
Micom
Micom
Panel_STB_ON
Panel_ON
Micom
Micom
TV_SUB_ON
Vlow
ON/OFF
PA
S
Power SW
CONV.
F_STB_14V
F_STB
ON/OFF
<Load Circuit>
CONV.
MAIN/SUB 5V
MAIN SUB 9V
MAIN SUB 9V
TV_MAIN_ON
Vsus
ON/OFF
ACFB
Circuit
15V
Vsus
Vda
SW
SW
STB_PS
SS
1. The voltage driving each circuit is made by P board.
2. The circuit of P board consists of “standby power circuit”, “PFC circuit” and
2. The circuit of P board consists of “standby power circuit”, “PFC circuit” and
“ACFB circuit”.
STANDBY produces 5V and 12V, PFC produces 390V, ACFB produces Vsus,
Vda, 15V, 12V
3. These power circuits are controlled by micros on P board and D, DG boards.
4. DG BOARD PSU CONTROL SIGNALS:
Vda, 15V, 12V
3. These power circuits are controlled by micros on P board and D, DG boards.
4. DG BOARD PSU CONTROL SIGNALS:
• “TUNER SUB” pin 216 IC1103. This signal goes to P board but its
name changes to “FSTBY ON” to P25 connector pin 13. This goes
high after DG board boots up. This turns on the PFC circuit to produce
380V.
high after DG board boots up. This turns on the PFC circuit to produce
380V.
• “TUNER MAIN” pin 215 IC1103 comes on to turn on PA board
supplies, will go H when active
• “PANEL STBY ON” pin 5 IC1103 line goes high to switch on 3.3V
STBY for the D board micro IC9003. This allows the D board to then
operate:-
operate:-