Service Manual
Page 37
...C133 C134 C135 C136 39p 39p 39p 39p C131 NA MIC_P MIC_N HEADSET_MIC_P HEADSET_MIC_N CLOSE TO AD6537B R111 4.7 R114 4.7 C139 39p HEADSET_SPK_P HEADSET_SPK_N RINGTONE C140 C141 39p 39p REC_P REC_N From Headset Microphone LGND DGND M2 N15 R8 C143 C144 39p 39p To Headset Speaker SGND1 SGND2 Figure 3-...19 B2050 HEADSET SPEAKER/MIC CIRCUIT (AD6537B) AIN3L R13 AIN3R R14 P15 AIN2P AIN2N R15 AIN1P P16 R16 AIN1N NC_R12 R12 AOUT1P J15 AOUT1N K15...
...C133 C134 C135 C136 39p 39p 39p 39p C131 NA MIC_P MIC_N HEADSET_MIC_P HEADSET_MIC_N CLOSE TO AD6537B R111 4.7 R114 4.7 C139 39p HEADSET_SPK_P HEADSET_SPK_N RINGTONE C140 C141 39p 39p REC_P REC_N From Headset Microphone LGND DGND M2 N15 R8 C143 C144 39p 39p To Headset Speaker SGND1 SGND2 Figure 3-...19 B2050 HEADSET SPEAKER/MIC CIRCUIT (AD6537B) AIN3L R13 AIN3R R14 P15 AIN2P AIN2N R15 AIN1P P16 R16 AIN1N NC_R12 R12 AOUT1P J15 AOUT1N K15...
Service Manual
Page 39
... PWRON _RESET RADIO_STO RADIO_DETECT SPK_RADIO_SEL RADIO_SEL LCD_DIM_CTRL RADIO_SDA ONNOFF RADIO_SCL 2 PWRON 1 _F_WP DSR _MIDI_RESET HOOK_DETECT RADIO_VOL_CLK _LCD_RESET LCD_ID SPK_SEL DEBUG_RX DEBUG_TX RADIO_AMP_SHDN C14S02050 _MIDI_IRQ BATT_EPROM RINGTONE M JACK_DETECT RADIO_VOL_CTRL R117 4.7K R118 10K AMP_EN LCD_BL_EN V1 U1 P5 T4 V2 V4 T5 V6 N9 V7 N10 P13 C9 E9 F9 V3 L18...
... PWRON _RESET RADIO_STO RADIO_DETECT SPK_RADIO_SEL RADIO_SEL LCD_DIM_CTRL RADIO_SDA ONNOFF RADIO_SCL 2 PWRON 1 _F_WP DSR _MIDI_RESET HOOK_DETECT RADIO_VOL_CLK _LCD_RESET LCD_ID SPK_SEL DEBUG_RX DEBUG_TX RADIO_AMP_SHDN C14S02050 _MIDI_IRQ BATT_EPROM RINGTONE M JACK_DETECT RADIO_VOL_CTRL R117 4.7K R118 10K AMP_EN LCD_BL_EN V1 U1 P5 T4 V2 V4 T5 V6 N9 V7 N10 P13 C9 E9 F9 V3 L18...
Service Manual
Page 79
4 . TROUBLE SHOOTING 4.11 Receiver Trouble TEST POINT CIRCUIT DIAGRAM AGND2 AGND1 SGND1 SGND2 DGND LGND AOUT1P J15 K15 AOUT1N AOUT2P1 AOUT2P2 AOUT2N1 R11 T11 T9 R9 AOUT2N2 AOUT3P J16 AOUT3N K16 C2 GPI C143 C144 39p 39p R111 4.7 R114 4.7 C139 39p HEADSET_SPK_P HEADSET_SPK_N RINGTONE C140 C141 39p 39p REC_P REC_N VBAT C220 10u SPK_P SPK_SEL REC_P U202 NLAS4684MR2 1 V+ 10 NO2 2 NO1 9 COM2 3 COM1 8 IN2 4 IN1 7 NC2 5 NC1 6 GND C299 NA SPK_N CN200 1 2 C298 NA REC_N A11 B16 T8 R8 M2 N15 - 78 -
4 . TROUBLE SHOOTING 4.11 Receiver Trouble TEST POINT CIRCUIT DIAGRAM AGND2 AGND1 SGND1 SGND2 DGND LGND AOUT1P J15 K15 AOUT1N AOUT2P1 AOUT2P2 AOUT2N1 R11 T11 T9 R9 AOUT2N2 AOUT3P J16 AOUT3N K16 C2 GPI C143 C144 39p 39p R111 4.7 R114 4.7 C139 39p HEADSET_SPK_P HEADSET_SPK_N RINGTONE C140 C141 39p 39p REC_P REC_N VBAT C220 10u SPK_P SPK_SEL REC_P U202 NLAS4684MR2 1 V+ 10 NO2 2 NO1 9 COM2 3 COM1 8 IN2 4 IN1 7 NC2 5 NC1 6 GND C299 NA SPK_N CN200 1 2 C298 NA REC_N A11 B16 T8 R8 M2 N15 - 78 -
Service Manual
Page 98
... ONNOFF RADIO_SCL PWRON _F_WP DSR _MIDI_RESET HOOK_DETECT RADIO_VOL_CLK _LCD_RESET LCD_ID SPK_SEL DEBUG_RX DEBUG_TX R130 100K VA333 RADIO_AMP_SHDN AVLC14S02050 _MIDI_IRQ BATT_EPROM RINGTONE R131 100K VA332 AVLC14S02050 2V8_VMEM JACK_DETECT RADIO_VOL_CTRL R117 4.7K R118 10K AMP_EN LCD_BL_EN KEY_ROW0 KEY_ROW1 GPIO_55 GPIO_56 BOOT MODE KEY_ROW2... 12.08 Sign & Name MODEL KIM H.J. Ver.1.0 1 2 3 4 5 LGIC(42)-A-5505-10:01 LG Electronics Inc. - 97 - DRAWING NAME B2050 Sheet/Sheets 1/5 Hermes 6527 ,Typhoon 6537B A9 VSSRTC P10 VSSUSB D4 GND1 V15 N16 P7 N12 M5 N5 ...
... ONNOFF RADIO_SCL PWRON _F_WP DSR _MIDI_RESET HOOK_DETECT RADIO_VOL_CLK _LCD_RESET LCD_ID SPK_SEL DEBUG_RX DEBUG_TX R130 100K VA333 RADIO_AMP_SHDN AVLC14S02050 _MIDI_IRQ BATT_EPROM RINGTONE R131 100K VA332 AVLC14S02050 2V8_VMEM JACK_DETECT RADIO_VOL_CTRL R117 4.7K R118 10K AMP_EN LCD_BL_EN KEY_ROW0 KEY_ROW1 GPIO_55 GPIO_56 BOOT MODE KEY_ROW2... 12.08 Sign & Name MODEL KIM H.J. Ver.1.0 1 2 3 4 5 LGIC(42)-A-5505-10:01 LG Electronics Inc. - 97 - DRAWING NAME B2050 Sheet/Sheets 1/5 Hermes 6527 ,Typhoon 6537B A9 VSSRTC P10 VSSUSB D4 GND1 V15 N16 P7 N12 M5 N5 ...