Kenwood KVT-910DVD Service Manual page 16

KVT-910DVD/920DVD/930DVD/
940DVD/960DVD
GSUB-CIRCUIT UNIT (X13-9770-00)
Ref.No. Component name
IC1 NJM2406F
GDVD UNIT (X37-1010-02)
Ref.No. Component name
IC1 SP3721A
IC2 NJM2125F
IC3 NJU7093A
IC4 NJM2406F
IC5 NJM2100M
IC6 LA6393M
IC7 L88MS05T
IC8 LA6553
IC9 BD6661FV
IC10 NJU7096AR
IC11 SN74AHC1G08D
IC12 NJM2125F
IC13 SN74AHC1G08D
IC14 CXD1867R
IC15 L88M33T
IC16 IS41C16256
IC17 SN74AHC2GU04H
IC19 SN74AHC1GU04D
IC20 CXD3008Q
IC21 L88MS05T
IC22 HD6433062G24XI
IC23 BR24C04FV-W
Q1 MCH6101
Q2 MCH6101
Q3 2SB1295
Q5 DTC124EUA
Q4 3LN01M
Q6 3LP01M
Q7 DTC124EUA
Q8 2SB1295
Q9 DTC124EUA
Q10 2SC4081
Q11 2SA1576A
Q12 2SC4081
Q13 DTC124EUA
Q27 CPH3105
Q14 2SB1295
Q15 DTC124EUA
Q16 3LP01M
Q17 DTC124EUA
Q18 DTC124EUA
Q23 DTC124EUA
Q24 2SB1295
Q25 3LN01M
Q26 UMC2N
18
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COMPONENTS DESCRIPTION
Application / Functions
Comparator
Application / Functions
RF signal processing IC
Op-Amplifier
Op-Amplifier
Comparator
Op-Amplifier
Comparator
5V AVR
4chBTL driver
3-phase motor driver
Op-Amplifier
AND gate
Op-Amplifier
AND gate
Signal processing decoder IC
3.3V AVR
DRAM
Inverter
Inverter
Digital signal processing IC
5V AVR
Mechanism micom
EEPROM
DVD APC
CD APC
DVD laser high-frequency
redundancy circuit SW
DFT level conversion
Layer jump monitor
Layer gain SW
Thread movement detection circuit SW When Q9 base becomes Hi, Q8 comes ON.
Layer jump control SW
Layer jump control SW
IC20 power supply SW
Disc detection circuit SW
FDCHG inverter
HRES- inverter
IC7 power supply SW
IC9 VCC SW
MIRR level conversion
IFSEL SW
Operation / Conditions / Compatibility
Thread pulse wave rectifying
Operation / Conditions / Compatibility
RF signal processing (AGC,EQ, etc.),Servo signal
processing (FE,TE,CE,DFCT,MIRR,APC, etc.)
VC(2.5V) buffer (voltage follower)
Jitter signal amplifier
FOK signal generation (PI converter)
Layer jump monitor (FE signal reversal, LPF)
Layer jump monitor (window comparator)
For RF amplifier, pickup, and servo
Focus tracking actuator, thread loading motor driver
For PWM driver spindle motor
Spindle servo (SPO) signal amplifier (LPF, gain rectifying)
RESET control
VC2(1.65V) buffer (voltage follower)
Clock ON/OFF control
Functions for CD-ROM decoder, ATAPI I/F, AV decoder I/F, DVD
PLL, DVD error correction,Buffered Audio Play, and Subcode data
Power supply for IC14
EDO DRAM 4Mbit
Clock oscillation for IC14,20, and buffer (33.86MHz)
"HRES-" reversal
Error correction for CD PLL and CD, digital serve (focus,
tracking, thread) function, automatic adjustment
Power supply for IC14,20 and digital systems
Backup memory (coefficient and others)
DVD laser amount control
CD laser amount control
When Q5 base becomes Hi, Q3 comes ON.
When the base becomes Hi, comes ON and sets the gain to Lo.
For Lo kick
For Hi kick
When Q12 base becomes Hi, Q11 comes ON.
When Q13 base becomes Hi, Q27 comes ON.
When Q15 base becomes Hi, Q14 comes ON.
FDCHG logic reversal
When base becoes Hi, comes ON. AVR functions.
When Q23 base becomes Hi, Q24 comes ON. IC9 functions.
When base becoes Hi, comes ON.