Panasonic PT-RZ21KE / PT-RS20K Service Manual ▷ View online
INF-39
SECTION 1 SERVICE INFORMATION
< RZ21K / RS20K >
5. 4. Troubleshooting
• The letters in the left of inspection items indicate the P.C. Boards related to their respective descriptions.
■ Power does not turn ON. ([ON/STANDBY] LED does not light in red)
Check the connection of each connector.
R1 - G17, PB3 - G3, S1 - G31
NG
Connect the cables firmly.
G Check the voltage 3.3V at pin 1 of connector G3.
NG
PF
PB
Check cable connector PF5 - PB1 / PB2.
Replace the [PF]/[PB] P.C.Board.
G Check and replace the [G] P.C.Board.
OK
OK
• Please take care for electro-static discharges by using grounded wrist straps to release the electricity from
the body.
■ Light source does not turn on. (Both of [LIGHT1, LIGHT2] LED blink 3 times)
Check the connection of each connector.
PF3/PF4 - D1, G5/G6 - D3, D2 - DR2/DR5, D5 - DR7/DR8,
DR1/DR3/DR4/DR6 - LD
NG
Connect the cables firmly.
D
Check the driver input voltage.
Check the voltage DC380V between pin 1 and 3, and
voltage DC16V between pin 4 and 3, of connector D1
at the lighting mode.
NG
PF
PB Replace [PF] or [PB] P.C.Board
PB Replace [PF] or [PB] P.C.Board
D
Check the driver input voltage.
Check the voltage DC12V at pin 13 of connector D3, at the
lighting mode.
NG
G Replace [G] P.C.Board
D
DR Replace [D] or [DR] P.C.Board
OK
OK
OK
INF-40
SECTION 1 SERVICE INFORMATION
< RZ21K / RS20K >
■ Light source does not turn on. (Either of [LIGHT1 or LIGHT2] LED blinks 3 times)
■ Light source does not turn on. (Either of [LIGHT1 or LIGHT2] LED blinks twice)
Check the connection of each connector.
PF3/PF4 - D1, G5/G6 - D3, D2 - DR2/DR5, D5 - DR7/DR8,
DR1/DR3/DR4/DR6 - LD
NG
Connect the cables firmly.
Check up the failure part on the LD with the self-check or logs.
D
Check the driver input voltage.
Check the voltage DC380V between pin 1 and 3, and voltage
DC16V between pin 4 and 3, of connector D1 at the lighting
mode.
NG
PF
PB Replace [PF] or [PB] P.C.Board
D
Check the connection of each connector.
D2 - DR2/DR5, D5 - DR7/DR8, DR1/DR3/DR4/DR6 - LD
NG
Connect the cables firmly.
Reset the status of the LD units with the LD reset tool.
D
DR Replace [D] or [DR] P.C.Board
Replace appropriate LD unit.
OK
OK
OK
OK
INF-41
SECTION 1 SERVICE INFORMATION
< RZ21K / RS20K >
■ No picture or abnormal picture is output
Check connection of each connector.
Check the input image other than solid black image.
Connect the cables firmly.
j
OK
OK
OK
NG
Is a menu screen displayed ?
No image is displayed
j
NG
Is the test pattern displayed?
NG
NG
NG
NG
NG
NG
NG
NG
NG
NG
OK
A Check IC3058 and peripheral circuit.
No image with VIDEO input.
Follow the section "VIDEO input check"
No image with Y/C input.
Follow the section "Y/C input check"
No image with RGB1 input.
Follow the section "RGB1 input check"
No image with RGB2 input.
Follow the section "RGB2 input check"
No image with DVI-D input.
Follow the section "DVI-D input check"
No image with HDMI input.
Follow the section "HDMI input check"
No image with DIGITAL LINK input.
Follow the section "DIGITAL LINK input check"
No image with SDI1 input.
Follow the section "SDI1 input check"
No image with SDI2 input.
Follow the section "SDI2 input check"
A Check the signal waveform at pin 20 of connector A2.
(ADG_LVDSL_CKP)
NG
Follow the section "A-P.C.Board operation check"
A Check the voltage 3.3V at pin 106 of connector A2.
(FM_RESET).
NG
Follow the section "Main microprocessor operation check"
A Check the voltage 3.3V at pin 107 of connector A2.
(PWRGOOD2).
NG
Check IC3501 (Main CPU) and IC3515 (AND gate) and
peripheral circuit, or replace [PF]/[PB]-P.C.Board.
Follow the section "DG/FM-P.C.Board operation check"
OK
OK
OK
INF-42
SECTION 1 SERVICE INFORMATION
< RZ21K / RS20K >
■ VIDEO input check
A Check the waveform at C3013.
OK
A Check IC3501, X3501 and peripheral circuit.
A Check the waveform at C3011(Y signal) and at C3012 (C signal). OK
A Check IC3501, X3501 and peripheral circuit.
A Check the waveform at C3005.
OK
A Check IC3062 and peripheral circuit.
A Check the waveform at C3003 (Y signal) and at C3004 (C
signal).
OK
A Check IC3062 and peripheral circuit.
A Check the waveform at C3049.
OK
A Check IC3075 and peripheral circuit.
A Check the waveform at C3239.
OK
A Check Q3036 and peripheral circuit.
A Check L3042 and peripheral circuit.
A Check L3043, L3044, Q3037, Q3038 and peripheral circuit.
OK
OK
NG
NG
NG
NG
NG
NG
One of the input (Y/C, RGB2, HDMI) can be displayed.
NG
Follow the section "A-P.C.Board operation check"
Is the image displayed with VIDEO input?
NG
Follow the section "A-P.C.Board operation check"
■ Y/C input check
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