Sharp BD-HP22H (serv.man4) Service Manual ▷ View online
BD-HP22H/S
4 – 5
3. OPERATION/LCD UNIT
The reproduced audio signal does not come from each audio output terminal.
Is the audio signal outputted from J2401?
YES
NO
Check the pattern up to J2401.
Check the connected cable and its connection tightness.
Check also the input of connected TV set or amplifier.
Check also the input of connected TV set or amplifier.
Disconnect CN2301. Is there the audio signal at SC5601?
Does the mute circuit function?
Is the audio signal inputted to J2401?
Check the mute circuit and the AUDIO_MUTE signal lines.
Muting occurs when AUDIO_MUTE signal are at "H" level.
Muting occurs when AUDIO_MUTE signal are at "H" level.
YES
NO
Are there the following input audio signals at CN2301?
pin (16)
AUD_MAIN_L
pin (18)
AUD_MAIN_R
MAIN FLOW CHART No.4
NO
NO
YES
YES
Check the pattern up to R2212 and R2213.
NO
Check each terminal.
YES
FLOW CHART No.2
The remote controller does not function.
The main unit controls function, but the remote controller
controls fail to function.
controls fail to function.
YES
YES
Check the line between pin (1) of RMC1101 and pin (23) of IC2503.
Check the remote control codes 1, 2 and 3.
Using the remote controller, is the "L" pulse signal outputted
from pin (1) of RMC1101?
from pin (1) of RMC1101?
Is the "L" pulse signal inputted to pin (23) of IC2503?
Replace RMC1101 or the remote control receiver.
NO
NO
Is the remote control code as specified?
NO
YES
Is the 5V voltage applied to pin (3) of the RMC1101 remote
control receiver?
control receiver?
Check the AT_5V line.
NO
YES
Check IC2503. Replace it as required.
YES
FLOW CHART No.1
BD-HP22H/S
4 – 6
The LCD display fails to light up.
Is the LCD unit cracked or otherwise damaged?
NO
NO
Check all the signal lines between SC1101 and IC1101.
Replace LCD1101.
Are there the following inputs to the following pins: 5V at pin
(37), LCD_RST at pin (36), LCD_CS at pin (42), LCD_CLK at
pin (43) and LCD_DATA at pin (44), all on IC1101?
(37), LCD_RST at pin (36), LCD_CS at pin (42), LCD_CLK at
pin (43) and LCD_DATA at pin (44), all on IC1101?
Are there the following outputs from the following pins: 5V at
pin (1), LCD_CS at pin (10), LCD_DATA at pin (12),
LCD_CLK at pin (11) and LCD_RST at pin (7), all on SC1101?
pin (1), LCD_CS at pin (10), LCD_DATA at pin (12),
LCD_CLK at pin (11) and LCD_RST at pin (7), all on SC1101?
Check IC1101 and its peripheral circuits. Or replace IC1101 as
required.
required.
YES
YES
Check the connection between CN2501 and CN1101.
YES
Is the display-designated SEG or COM signal inputted to
LCD1101?
LCD1101?
YES
Replace LCD1101.
YES
NO
Are the signals outputted from pins (1 thru 17, 33, 34 and 35)
of IC1101?
of IC1101?
Check the pattern between IC1101 and LCD1101.
YES
NO
Are there the following inputs to the following pins: 5V at pin
(1), LCD_CS at pin (10), LCD_DATA at pin (12), LCD_CLK
at pin (11) and LCD_RST at pin (7), all on CN2501?
(1), LCD_CS at pin (10), LCD_DATA at pin (12), LCD_CLK
at pin (11) and LCD_RST at pin (7), all on CN2501?
NO
Check the following signal flows:
LCD_DATA; Pin (99) of IC2503 to pin (12) of CN2501
LCD_CLK; Pin (100) of IC2503 to pin (11) of CN2501
LCD_RST; Pin (1) of IC2503 to pin (7) of CN2501
LCD_CS; Pin (45) of IC2503 to pin (10) of CN2501
Check also IC2503 and its peripheral circuits.
LCD_DATA; Pin (99) of IC2503 to pin (12) of CN2501
LCD_CLK; Pin (100) of IC2503 to pin (11) of CN2501
LCD_RST; Pin (1) of IC2503 to pin (7) of CN2501
LCD_CS; Pin (45) of IC2503 to pin (10) of CN2501
Check also IC2503 and its peripheral circuits.
NO
Is the 5V signal fed to pin (1) of CN2501?
NO
Check the AT_5V line.
FLOW CHART No.2
The LCD backlight fails to light up.
Is the "H" voltage applied at the non-base-connected side of
Q1107 on R1138?
Q1107 on R1138?
NO
NO
Check the pattern between pin (6) of SC1101 and R1138.
Is the "H" potential outputted from pin (38) (LED_BL_LCD) of
IC2503?
IC2503?
Check IC2503 and its peripheral circuits.
Or replace IC2503 as required.
Or replace IC2503 as required.
Check the line between pin (38) of IC2503and pin (6) of CN2501.
YES
Is the "H" potential applied at pin (6) (BL_LCD) of SC1101?
YES
Check Q1107, LED and the current-limiting resistor.
YES
NO
Is the "H" potential applied at pin (6) (BL_LCD) of CN2501?
Check the FFC between SC1101 and CN2501.
YES
NO
FLOW CHART No.3
BD-HP22H/S
4 – 7
The LED power indicator fails to light up.
Is the power as specified?
YES
NO
Check each transistor, LED and the current-limiting resistor.
Is there the "H" potential at pin (4) (LED_STBY) or pin (5)
(LED_PON) of P902?
(LED_PON) of P902?
Is the "H" potential outputted from pin (51) (LED_STBY) or pin
(49) (LED_PON) of IC2503?
(49) (LED_PON) of IC2503?
Check the connector between SC1201 and P902.
YES
Check the line between IC2503 and P902.
YES
Is the "H" potential applied at the base of Q1202 or Q1203?
YES
POWER FLOW CHART No.1 or POWER FLOW CHART No.3
NO
NO
Check IC2503 and its peripheral circuits. Or replace IC2503 as
required.
required.
NO
Is there the "H" potential at pin (4) (LED_STBY) or pin (5)
(LED_PON) of SC1201?
(LED_PON) of SC1201?
Check the line between SC1201 and the base of each transistor.
YES
NO
FLOW CHART No.4
The LED mode display indicator fails to light up.
* White LED: Blinking while the disc is being loaded.
* White LED: Blinking while the disc is being loaded.
Lights up when the disc has been recognized.
* Blue LED:
While the disc is being played back.
Is the "H" potential applied at the base of Q1104 or Q1105?
NO
NO
Check the line between SC1101 and the base of each transistor.
Is there the "H" potential output from the following pins in each
mode: Pin (52), (LED_MODE) or pin (53) (LED_PLAY),
all on IC2503?
mode: Pin (52), (LED_MODE) or pin (53) (LED_PLAY),
all on IC2503?
Check IC2503 and its peripheral circuits. Or replace IC2503
as required.
as required.
Check the line between IC2503 and CN2501.
YES
Is there the "H" potential at pin (5) (LED_MODE) or pin
(4) (LED_PLAY) of SC1101?
(4) (LED_PLAY) of SC1101?
YES
Check each transistor, LED and the current-limiting resistor.
YES
NO
Is there the "H" potential at pin (5) (LED_MODE) or pin (4)
(LED_PLAY) of CN2501?
(LED_PLAY) of CN2501?
Check the FFC between SC1101 and CN2501.
YES
NO
FLOW CHART No.5
BD-HP22H/S
4 – 8
4. ETHER UNIT
A button fails to work.
Is the button switch contact and tightness as specified?
YES
YES
Check the line between each button and IC2503. Or check the
pull-up resistor at pin (72) of IC2503. (R2578)
pull-up resistor at pin (72) of IC2503. (R2578)
Is the control voltage properly applied at pin (72) (KEY_EJCT)
and pin (73) (KEY_STBY) of IC2503? (While the relevant
button is held down, the "H" level changes to "L" level.)
and pin (73) (KEY_STBY) of IC2503? (While the relevant
button is held down, the "H" level changes to "L" level.)
NO
Check the relevant switch. Replace it as required.
NO
Check IC2503 and its peripheral circuits. Or replace IC2503
as required.
as required.
FLOW CHART No.6
Internet connection impossible with Ether terminal.
Still malfunctioning even by replacing the cable.
NO
YES
Is any signal input into pins (1)/(2)/(4)/(5) of the J7001?
Check the J7001 contact.
Cable defective.
YES
NO
Is any signal input into pins (28)/(29)/(31)/(32) of the IC7001?
Check the peripheral circuits of J7001.
YES
Check or replace the peripheral circuits of X7001 and R7024.
NO
Check the peripheral circuits of FB7001, FB9004 and IC9002.
NO
YES
Is 50MHz clock detected at pin (14) of IC7001?
Is 3.3V supplied to pins (7)/(25)/(30)/(33)/(35) of IC7001?
YES
Check or replace the peripheral circuits of IC7201.
YES
Is any signal input into the R7004 - 7012?
YES
Check or replace the peripheral circuits of IC7001.
NO
Is 50MHz clock detected of R7027?
NO
Check or replace the peripheral circuits of IC7201.
YES
FLOW CHART No.1
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