No Sound. Noise Generated; Common (Power, Control Signal) - Marantz HD-AMP1/U1B/N1B/N1SG Service Manual

2. No Sound. Noise generated

2.1.1. COMMON (POWER, control signal)

Check Power Supply Voltages for USB-A / MLC3730S [IC21].
DIGITAL PCB
[IC21] U9, T16, D14, P14, A10, D4, P4pin : +3.3V
[IC21] E9, A9, J4, J14, U4, T10pin : +1.2V
[IC21] P12pin : +1.2V
[IC21] A4pin : +3.3V
[IC21] P9, B7, U5, U6pin : +1.2V
Check Power Supply Voltages for USB-B / XS1U8A128FB217C10
[IC25].
DIGITAL PCB
[IC25] K1, K2, N1, W1, W7, V7pin : +3.3V
Check Power Supply Voltages for DIR / PCM9211PTR [IC31].
DIGITAL PCB
[IC31] 22, 36, 42pin : +3.3V
Check Power Supply Voltages for DAC / ES9010k2M [IC52].
MAIN (DAC) PCB
[IC52] 18pin : +3.3V
[IC52] 21pin : +1.3V
Check Power Supply Voltages for TONE / NJW1163V [IC66].
MAIN PCB
[IC66] 17pin : +12V
O.K.
O.K.
O.K.
O.K.
O.K.
N.G.
Check Soldering or replace device / SPMS.
SMPS PCB ➡ DIGITAL PCB
[BN93] 7, 8pin ➡ [CN93] 7, 8pin : +5V ➡ [L113]
➡ [IC17] 1pin : +5V, 3pin : +3.3V ➡ [L206]
[BN93] 7, 8pin ➡ [CN93] 7, 8pin : +5V ➡ [L113]
➡ [IC17] 1pin : +5V, 3pin : +3.3V ➡ [L104]
➡ [IC18] 3pin : +3.3V, 2pin : 1.2V ➡ [L203]
[BN93] 7, 8pin ➡ [CN93] 7, 8pin : +5V ➡ [L113]
➡ [IC17] 1pin : +5V, 3pin : +3.3V ➡ [L104]
➡ [IC18] 3pin : +3.3V, 2pin : 1.2V ➡ [L204]
[BN93] 7, 8pin ➡ [CN93] 7, 8pin : +5V ➡ [L113]
➡ [IC17] 1pin : +5V, 3pin : +3.3V ➡ [L208]
[BN93] 7, 8pin ➡ [CN93] 7, 8pin : +5V ➡ [L113]
➡ [IC17] 1pin : +5V, 3pin : +3.3V ➡ [L104]
➡ [IC18] 3pin : +3.3V, 2pin : 1.2V ➡ [L205]
N.G.
Check Soldering or replace device / SPMS.
SMPS PCB ➡ DIGITAL PCB
[BN93] 7, 8pin ➡ [CN93] 7, 8pin : +5V ➡ [L112]
➡ [IC10] 1pin : +5V, 3pin : +3.3V ➡ [L211]
N.G.
Check Soldering or replace device / SPMS.
SMPS PCB ➡ DIGITAL PCB
[BN93] 7, 8pin ➡ [CN93] 7, 8pin : +5V
➡ [IC16] 3pin : +5V, 2pin : +3.3V
Check Soldering or replace device / SPMS.
N.G.
SMPS PCB ➡ MAIN PCB
[BN92] 7pin ➡ [CN92] 7pin : +12V
➡ [L706] ➡ [CN66] 13pin
[BN92] 7pin ➡ [CN92] 7pin : +12V
➡ [L706] ➡ [CN66] 13pin
N.G.
Check Soldering or replace device / SPMS.
SMPS PCB ➡ MAIN PCB
[BN92] 7pin ➡ [CN92] 7pin : +12V
➡ [L706]
35
➡ MAIN(DAC) PCB
➡ [BN66] 13pin ➡ [L506]
➡ [IC53] 3pin : 12V, 2pin : 3.3V
➡ [BN66] 13pin ➡ [L506]
➡ [IC53] 3pin : 12V, 2pin : 3.3V
➡ [IC51] 1pin : 3.3V, 5pin : 1.3V
➡ [L507]